The URL can be used to link to this page

Home My WebLink AboutWPO202100058 VSMP - SWPPP 2021-10-07�osAlrlCOUNTY OF ALBEMARLE � Department of Community Development ." ++ 401 McIntire Road, North Wing Charlottesville, Virginia 22902-4596 Tel. (434) 296-5832 • Fax (434) 972-4126 Stormwater Pollution Prevention Plan (SWPPP) Project Name: Address: For Construction Activities At: Seminole Trail and Ashwood Blvd. Arbemarle County, Virginia Prepared by: Name: Ryan T. Yauger, P.E. Prepared for: Name SWPPP Preparation Date: October 7, 2021 (This document is to be made publicly available according to 9VAC25-880-70, Part II, section D) APPROVED by the Albemarle County Community Development Department Date 07/07/2022 File WP0202100038 Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County CONTENTS: (from Albemarle County Code Sec. 17-405) 1. Registration statement 2. Notice of general permit coverage 3. Nature of activity 4. Erosion and Sediment Control Plan. 5. Stormwater Management Plan 6. Pollution Prevention Plan. 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. 8. Qualified personnel 9. Signed Certification 10. Delegation of authority. 11. General permit copy 12. Inspection logs Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 1. Registration statement (Provide a signed completed copy of the DEQ registration statement) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY GENERAL VPDES PERMIT FOR DISCHARGES OF STORMWATER FROM CONSTRUCTION ACTIVITIES (VAR10) REGISTRATION STATEMENT 2019 Application type. ® NEW PERMIT ISSUANCE (CHOOSE ONE) ❑ MODIFICATION WITH ACREAGE INCREASE ❑ MODIFICATION WITHOUT ACREAGE INCREASE ❑ EXISTING PERMIT RE -ISSUANCE Section I. Operator/Permittee Information. PERMIT #: PLAN/ID #: TECHNICAL CRITERIA: IIB ❑ IIC ❑ A. Construction Activity Operator (Permittee). The person or entity that is applying for permit coverage and will have operational control over construction activities to ensure compliance with the general permit. A person with signatory authority for this operator must sign the certification in Section V. (per Part III. K. of the VAR10 Permit). Operator Name: Contact person: Alex Mays Address: 168 Business Park DriveSuite City, State and Zip Code: Virginia Beach VA 23462 Phone Number: 202-498-0317 Primary and CC Email: aleX rstdevel0 ment.com / au er(cDbohleren .com B. Electronic correspondence. To receive an emailed coverage letter or to pay by credit card, you must choose YES and include a valid email. May we transmit correspondence electronically? YES a) NO ❑ Section II. Construction Activity Information. A. Include a site map showing the location of the existing or proposed land -disturbing activities, the limits of land disturbance, construction entrances and all waterbodies receiving stormwater discharges from the site. B. Project site location information. Construction Activity Name: RST Residences Address: Seminole Trail and Ashwood Blvd. City and/or County and Zip Code: Chartoftesville. VA 22911 Construction Activity Entrance Location (description, street address and/or latitude/longitude in decimal degrees): On Ashwood Blvd between Seminole Trail and Ashland Drive 38.112566:-78.451508 Latitude and Longitude (6-digit, decimal degrees format): 1 38.1100537 -78.441985 C. Acreage totals for all land -disturbing activities to be included under this permit coverage. Report to the nearest one -hundredth of an acre. Total land area of development (include entire area to be disturbed as approved in the Stormwater Management Plan): 19.51 Acres Primary estimated area to be disturbed (include portions with Erosion and Sediment Control Plan approval only): 18.55 Acres Off -site estimated area to be disturbed (if applicable): D. Property Owner Status: FEDERAL ❑ STATE ❑ PUBLIC ❑ PRIVATE E. Nature of the Construction Activity Description (i.e. commercial, industrial, residential, agricultural, environmental, utility): Residential F. Municipal Separate Storm Sewer System (MS4) name(s) (if the site is discharging to a MS4): VAR040051 G. Estimated Project Dates (MM/DD/YYYY). Start Date: 07/01/2022 Completion Date: H. Is this construction activity part of a larger common plan of development or sale? YES ❑ NO 29 Rev 11/2020 PAGE 1) 6 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019 I. 6'^ Order Hydrologic Unit Code (HUC) and Receiving Water Name(s). Include additional areas on a separate page. HUC NAME(S) OF RECEIVING WATERBODY South Fork Rivanna River Section III. Off -site Support Activity Location Information. List all off -site support activities and excavated material disposal areas being utilized for this project. Include additional areas on a separate page. Off -site Activity Name: Address: City or County: Off -site Activity Entrance Location (description, street address and/or latitude/longitude in decimal degrees): N/A Latitude and Longitude (6-digit, decimal degrees format): N/A Is this off -site activity an excavated material disposal area? YES ❑ NO 09 If this off -site activity is an excavated material disposal area, list the contents of the excavated fill material: N/A Will a separate VPDES permit cover this off -site activity? YES ❑ NO EN Section IV. Other Information. A. A stormwater pollution prevention plan (SWPPP) must be prepared in accordance with the requirements of the General VPDES Permit for Discharges of Stormwater from Construction Activities prior to submitting the Registration Statement. By signing the Registration Statement, the operator is certifying that the SWPPP has been prepared. B. Has an Erosion and Sediment Control Plan been submitted to the VESC Authority for review? YES X NO ❑ Erosion and Sediment Control Plan Approval Date (for the estimated area to be disturbed MM/DD/YYYY): TBD C. Has land -disturbance commenced? YES ❑ NO D. Annual Standards and Specifications. If this project is utilizing approved Annual Standards and Specifications (AS&S), attached the completed AS&S Entity Form. AS&S Entity Name (if different from the Operator identified in Section 1): 1 N/A E. Billing information (leave blank if same as the Operator identified in Section I. above). This entity will receive Annual Permit Maintenance and Permit Modification Fee invoices (if applicable). Billing Name: Contact Name: Address: City, State and Zip Code: Phone Number: Primary and CC Email: Rev 11/2020 PAGE 2 16 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019 Section V. Certification. A person representing the operator as identified in Section I. A. and meeting the requirements of 9VAC25-880-70. Part III. K must physically sign this certification. A typed signature is not acceptable. Please note that operator is defined in 9VAC25-870-10 as follows: "Operator" means the owner or operator of any facility or activity subject to the Act and this chapter. In the context of stormwater associated with a large or small construction activity, operator means any person associated with a construction project that meets either of the following two criteria: (i) the person has direct operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications or (ii) the person has day-to-day operational control of those activities at a project that are necessary to ensure compliance with a stormwater pollution prevention plan for the site or other state permit or VSMP authority permit conditions (i.e., they are authorized to direct workers at a site to carry out activities required by the stormwater pollution prevention plan or comply with other permit conditions). In the context of stormwater discharges from Municipal Separate Storm Sewer Systems (MS4s), operator means the operator of the regulated MS4 system. 9VAC25-880-70. Part III. K. Signatory Requirements. Registration Statement. All Registration Statements shall be signed as follows: a. For a corporation: by a responsible corporate officer. For the purpose of this chapter, a responsible corporate officer means: (i) a president secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy -making or decision -making functions for the corporation; or (ll) the manager of one or more manufacturing, production, or operating facilities, provided the manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for state permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures; b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or c. For a municipality, state, federal, or other public agency: by either a principal executive officer or ranking elected official. For purposes of this chapter, a principal executive officer of a public agency includes: (i) the chief executive officer of the agency or (li) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency. Certification: "I certify under penalty of law that I have read and understand this Registration Statement and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for submitting false information including the possibility of fine and imprisonment for knowing violations." Printed Name: Signature (signed in ink): Date Signed: Section VI. Submittal Instructions. Submit this form to the VSMP Authority. If the locality is the VSMP Authority, please send your Registration Statement submittal directly to the locality; do NOT send this form to DEQ. A list of local VSMP Authorities is available here: VSMP Authorities. If DEQ is the VSMP Authority, please send to: If the locality is the VSMP Authorityplease send to: Department of Environmental Quality Office of Stormwater Management Suite 1400 PO Box 1105 Richmond VA 23218 constructiongp@deg.virginia.gov Albemarle County Department of Community Development 401 McIntire Road Charlottesville. VA 22902 Rev 11/2020 PAGE 3 1 6 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 20191NSTRUCTIONS PLEASE DO NOT PRINT OR SUBMIT This Registration Statement is for coverage under the General VPDES Permit for Discharges of Stormwater from Construction Activities. This form covers the following permit actions: new permit issuance, existing permit modification with an increase in acreage, existing permit modifications that result in a plan modification but do not result in an increase in disturbed acreage, and reissuance of an active permit coverage. Application type. Select NEW PERMIT ISSUANCE to obtain a new permit coverage. Modifications are for modifying an existing, active permit coverage. Select MODIFICATION WITH ACREAGE INCREASE when the previously approved acreage(s) increases (permit modifications are not performed for decreases in acreage unless they result in plan changes — see Modification WITHOUT Acreage Increase). Select MODIFICATION WITHOUT ACREAGE INCREASE when there is a change to the site design resulting in a change to the approved plans with no increase in acreage(s). Select EXISTING PERMIT REISSUANCE to extend an expiring permit coverage for the next permit cycle and include the existing permit number. Section I. Operator/Permittee Information. A. Construction Activity Operator (Permittee). The person or entity that is applying for permit coverage and will have operational control over construction activities to ensure compliance with the general permit. For companies, use the complete, active, legal entity name as registered with a state corporation commission. Entities that are considered operators commonly consist of the property owner, developer of a project (the party with control of project plans and specifications), or general contractor (the party with day-to-day operational control of the activities at the project site that are necessary to ensure compliance with the general permit). If an individual person is listed as the operator, that person (or a legal representative of) must sign the certification in Section V. An operator may be one of the following: 9VAC25-870-10. Definitions "Operator" means the owner or operator of any facility or activity subject to the Act and this chapter. In the context of stormwater associated with a large or small construction activity, operator means any person associated with a construction project that meets either of the following two criteria: (i) the person has direct operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications or (H) the person has day-to-day operational control of those activities at a project that are necessary to ensure compliance with a stormwater pollution prevention plan for the site or other state permit or VSMP authority permit conditions (i.e., they are authorized to direct workers at a site to carry out activities required by the stormwater pollution prevention plan or comply with other permit conditions). In the context of stormwoter discharges from Municipal Separate Storm Sewer Systems (MS4s), operator means the operator of the regulated MS4 system. "Owner" means the Commonwealth or any of its political subdivisions including, but not limited to, sanitation district commissions and authorities, and any public or private institution, corporation, association, firm or company organized or existing under the laws of this or any other state or country, or any officer or agency of the United States, or any person or group of persons acting individually or as a group that owns, operates, charters, rents, or otherwise exercises control over or is responsible for any actual or potential discharge of sewage, industrial wastes, or other wastes or pollutants to state waters, or any facility or operation that has the capability to alter the physical, chemical, or biological properties of state waters in contravention of § 62.1-44.5 of the Code of Virginia, the Act and this chapter. "Person " means any individual, corporation, partnership, association, state, municipality, commission, or political subdivision of a state, governmental body, including a federal, state, or local entity as applicable, any interstate body or any other legal entity. B. May we transmit correspondence electronically? If you choose YES to this question and provide an email address in Section I. A., all correspondence, forms, invoices and notifications will be transmitted by email to the operator. This will also give the operator the ability to pay by credit card and to receive permit coverage aooroval letters immediately upon permit aoorovai. Section IL Construction Activity Information. A. A site map indicating the location of the existing or proposed land -disturbing activities, the limits of land disturbance, construction entrances and all water bodies receiving stormwater discharges from the site must be included with the submittal of this form. Aerial imagery maps or topographic maps showing the required items are acceptable. Plan sheet sized site maps are not required. Please consult your VSMP authority if you have additional questions regarding site map requirements. B. Construction Activity Name and location. Provide a descriptive project name (it is helpful to use the same naming convention as listed on the Stormwater Management plans), 911 street address (if available), city/county of the construction activity, and the 6-digit latitude and longitude in decimal degrees format for the centroid, main construction entrance or start and end points for linear projects (i.e. 37.1234N/-77.1234W). C. Acreage totals for all land -disturbing activities, on- and off -site, to be included under this permit. Acreages are to be reported to the nearest one -hundredth acre (two decimal places; i.e. 1.15 acres). Provide the total acreage of the primary development site as approved on the Stormwater Management Plans and the primary on -site estimated acreage to be disturbed by the construction activity as approved under the Erosion and Sediment Control Plans. The off -site estimated area to be disturbed is the sum of the disturbed acreages for all off -site support activities to be covered under this general permit. Do not include the off -site acreage totals in the primary, on -site total and estimated disturbed acreage totals. Permit fees are calculated based on your disturbed acreage total for all on- and off -site areas being disturbed under this permit coverage (the sum of all on -site and off -site disturbed acreages). D. Property owner status. The status of the construction activity property owner. Any property not owned by a government entity or agency (i.e. federal, state or local governments) is PRIVATE. Rev 11/2020 PAGE 4 16 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019INSTRUCTIONS PLEASE DO NOT PRINT OR SUBMIT E. Nature of the construction activity description. Choose the designation that best describes the post -construction use of this project (you may choose more than one). (i.e. Residential, Commercial, Industrial, Agricultural, Environmental, Educational, Oil and Gas, Utility, Transportation, Institutional, etc.). Describe the post -construction use of the project (i.e. Commercial —one new office building and associated parking and utilities; Transportation — Linear roads, sidewalks and utilities; Agricultural — 3 Poultry Houses, etc.). F. Municipal Separate Storm Sewer System (MS4) name(s) if discharging to a MS4. If stormwater is discharged through a MS4 (either partially or completely), provide the name of the M54(s) that will be receiving water from this construction activity. The MS4 name is typically the town, city, county, institute or federal facility where the construction activity is located. G. Estimated project dates. Provide the estimated project start date and completion date in Month/Day/year or MM/DD/YYYY format (i.e. 07/30/2019). H. Is this construction activity is part of a larger common plan of development or sale? "Common plan of development or sale" means a contiguous area where separate and distinct construction activities may be taking place at different times on different schedules per 9VAC25-870-10. Definitions. Le. a subdivision, commercial development, business park, etc. 1. 6th Order Hydrologic Unit Code (HUC) and associated Receiving Water Name(s). Provide all 6th order HUCs and receiving waterbody names, for the primary site and any Off -site areas included under this permit coverage, that could potentially receive stormwater runoff discharging from this activity. The HUC can be either a 12-cligit number (i.e. 0208010101) or 2-letter, 2-number code (i.e. JL52). Include additional HUCs or receiving waters on a separate page. You may utilize DEQ's web -based GIS application, VEGIS, to obtain this information. • VEGIS application link: DEQ's VEGIS Mapping Application • Instructions for utilizing DEQ's VEGIS application link: CGP-GIS HUC Instructions Section III. Off -site Support Activity Location Information. This general permit also authorizes stormwater discharges from support activities (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, borrow areas) located on -site or off -site provided that (i) the support activity is directly related to a construction activity that is required to have general permit coverage; (ii) the support activity is not a commercial operation, nor does it serve multiple unrelated construction activities by different operators; (ill) the support activity does not operate beyond the completion of the construction activity it supports; (iv) the support activity is identified in the Registration Statement at the time of general permit coverage; (v) appropriate control measures are identified in a SWPPP and implemented to address the discharges from the support activity areas; and (vi) all applicable state, federal, and local approvals are obtained for the support activity. Off -site activity name and location information. Provide a descriptive off -site project name, 911 street address (if available), construction entrance location (address or decimal degrees coordinates and description), city/county and the 6-digit latitude and longitude in decimal degrees (i.e. 37.1234N, 77.1234W) of all off -site support activities. Indicate whether the off -site support activity will be covered under this general permit or a separate VPDES permit. If excavated material (i.e., fill) will be transported off -site for disposal, the name and physical location address, when available, of all off -site excavated material disposal areas including city or county; 6-digit latitude and longitude in decimal degrees (i.e. 37.1234N,-77.1234W) and the contents of the excavated material. List additional off -site areas to be included under this permit coverage on a separate page. Off -site areas not included on this registration will need to obtain coverage under a separate VPDES permit. Section IV. Other Information. A. A stormwater pollution prevention plan (SWPPP) must be prepared prior to submitting the Registration Statement per 9VAC25-880. See 9VAC25-880-70. Part II. of the General Permit for the SWPPP requirements. B. If the Erosion and Sediment Control Plan for the estimated area to be disturbed listed in Section II. C. has been submitted to the VESC Authority for review and plan approval, choose YES. If you are submitting this application to reissue an existing permit coverage, please provide the date that the VESC Authority approved the Erosion and Sediment Control Plan for the estimated area to be disturbed. C. If land disturbance has commenced, choose YES. "Land disturbance" or "land -disturbing activity" means a man-made change to the land surface that may result in soil erosion or has the potential to change its runoff characteristics, including construction activity such as the clearing, grading, excavating, or filling of land per 462.1-44.15:24. Definitions. D. If this project is using approved Annual Standards and Specifications (AS&S), attach the completed AS&S Entity Form. If the AS&S Entity is different from the operator identified in Section I. A., list the AS&S Entity Name. The AS&S entity is the entity or agency that holds the approved annual standards & specification. Please indicate if this project is also requesting a plan waiver. • AS&S Entity Form link: Annual Standards and Specifications Entity Information Form Rev 11/2020 PAGE 5 16 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 20191NSTRUCTIONS PLEASE DO NOT PRINT OR SUBMIT E. Billing information. If the person or entity responsible for billing/invoicing is different from the operator, please complete this section. If they are the same, leave this section blank. Section V. Certification. A properly authorized individual associated with the operator identified in Section I. A. of the Registration Statement is responsible for certifying and signing the Registration Statement. A person must physically sign the certification, a typed signature is unacceptable. State statutes provide for severe penalties for submitting false information on the Registration Statement. State regulations require that the Registration Statement be signed as follows per 9VAC25-880-70 Part III. K. 1.: a. For a corporation: by a responsible corporate officer. For the purpose of this port, a responsible corporate officer means: (i) A president secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy -making or decision -making functions for the corporation, or (ii) the manager of one or more manufacturing, production, or operating facilities, provided the manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations, the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively. c. For a municipality, state, federal, or other public agency., by either a principal executive officer or ranking elected official. For purposes of this part a principal executive officer of a public agency includes: (i) The chief executive officer of the agency, or (ii) A senior executive officer having responsibilityfor the overall operations of a principal geographic unit of the agency. Section VI. Submittal Instructions. Submit this form to the VSMP Authority that has jurisdiction for your construction activity. The VSMP Authority may be either DEQor your locality depending on the location and type of project. If your project is under the jurisdiction of a Local VSMP Authority, please contact the locality for additional submittal instructions. A blank area is provided for the Local VSMP Authority's mailing address. Who is the VSMP Authority(army oroiect? DEQ or the locality? • DEQ: DEQ is the VSMP Authority and administers permit coverage for land -disturbing activities that are: • within a locality that is not a VSMP Authority; ➢ owned by the State or Federal government; or D utilizing approved Annual Standards and Specifications. • The Locality: The local government (locality) is the VSMP Authority and administers permit coverage for all other projects not covered by DEQ as listed above. For these projects, please submit permit forms directly to the Local VSMP Authority. A list of Local VSMP Authorities is available on DEQ's website here: Local VSMP Authority List. www.deci.virginia.gov/Programs/Water/StormwaterManagement/VSM PPermits/ConstructionGeneralPermit.aspx Email the completed and signed form to: constructiongp@deg.virginia.gov Rev 11/2020 PAGE 6 16 Section 2. Notice of general permit coverage (This notice is to be posted near the main entrance according to 9VAC25-880-70, Part II, section C.) (Provide a copy of the DEQ coverage letter when obtained) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 3. Nature of activity (Provide a detailed narrative of the construction activities. Include or reference a construction schedule and sequence. Include any phasing.) 1.0 SITE DESCRIPTION a. Nature of the Construction Activity The subject site is located along us route 29 Seminole Trail Road and Ashwood Boulevard the total disturbed area for the work proposed with this plan is 18.78 acres. The purpose of this project is to construct four (4) apartment buildings and six (6) strips of townhomes, as well as amenity areas and associate parking. To service the proposed development this plan will also include the installation of sanitary sewer, water lines, and storm infrastructure that will serve the proposed parking areas. There will also be two (2) underground detention systems with an isolator row pretreatment structure constructed with this plan. The total project is anticipated to take eighteen (18) months to complete. b. Intended Sequence of Major Soil -Disturbing Activities This project includes the attached general construction elements in order of the sequence of construction: 'See attached' c. Estimated Total Site Area to be Disturbed The construction limits encompass an area of disturbance that is approximately 18.78 acres of land. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 4. Erosion and Sediment Control Plan. (Provide a reduced, 11x17 copy of the latest Erosion and Sediment Control Plan. Do not reference only.) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County IN I / IN \- 29 1 .'' "I v 1� 0 AAA \ \ yy , p , _ -- / 9d ----------------------------- ----------------------------------- 190 i / A 1 - -- - - ------------------------ I _ ------ `1 G n N 1 N , N V -________, PHASE ►A SEQUENCE OF CONSTRUCTION Z 1. OBTAIN ALL REQUIRED PERMITS. Z_ W U 2. ATTEND PRE -CONSTRUCTION MEETING. C7 Z j Z to C 3. CONTRACTOR SHALL CONTACT JURISDICTION AT LEAST 1 WEEK PRIOR TO COMMENCING CONSTRUCTION. WW (0 ,2 U U_ 0 4. CONTRACTOR SHALL STAKE AND FLAG LIMITS OF DISTURBANCE. Z W H W of CO 5. CONTRACTOR TO USE THE EXISTING ENTRANCE ON SITE AS CONSTRUCTION ENTRANCES PRIOR TO H I j a = p of --- ', / GRADING AND INSTALLING THE PROPOSED CONSTRUCTION ENTRANCE ALONG ASHWOOD BLVD. > Z J ✓� C 6. DEMO ALL FEATURES NEEDED TO INSTALL ALL PERIMETER CONTROLS. mej z J) (A Z)M Q Q Z < -' 7. PERFORM GRADING SHOWN IN PHASE IA TO INSTALL THE CONSTRUCTION ENTRANCES PRIOR TO THE 0 p MWF d Z H O _ / ( START OF ANY MASS EARTH MOVING ACTIVITIES. 0 Q U 0 \ _ ., 8. CONTRACTOR TO GRADE AND INSTALL ALL SEDIMENT TRAPS AND SEDIMENT BASINS AS SHOWN IN PHASE IA Z J 0 co \ __ _ OF THE EROSION AND SEDIMENT CONTROL PLAN. J W Z � d ` _ 9. CONTRACTOR TO PROVIDE TEMPORARY SEEDING AND DUST CONTROL OF ALL DISTURBED AREAS AS J 0 `\I ` -- \ / / a NEEDED. (J O W ---__ -- _ NOTE: _ �- -- _ _- . INITIAL DISTURBANCE SHALL BE LIMITED TO ONLY THE DISTURBANCE NECESSARY TO INSTALL INITIAL � _ IN PERIMETER CONTROL AND MEASURES. • CONTRACTOR SHALL NOT COMMENCE PHASE IB OF THE EROSION AND SEDIMENT CONTROL PLAN PRIOR TO THE `\ \ \ COUNTY EROSION AND SEDIMENT CONTROL INSPECTORS APPROVAL AND COMPLETION OF ALL PHASE IA /' CONSTRUCTION. � \` `l�✓ f REVISIONS \`JyODQ�PROPER� /NUEST�GIEf�%TS,'1L�' '`, By )e78`PC 3B0 ;' ' REV DATE COMMENT dON(N6 f�l'`�RESID LJi 1 05/18/22 COUNTYCOMMENTS $E SIN \FAM/LY RE57V N114L / 4 i ,-- \\ \\\ `\ 2 07/01/22 COUNTY COMMENETS `SRO. C=0.60 400 LF. SF CROAK-H�! 215 L.F. SFI0.25 AC ✓ T� �LDy ; \ ; / `\\,/ `\` \ '`, '`\ '`\ �`\ 1 I, '1 `\I \ i EASEMENT r / I IN N, �:IN . / TAO ST-2 _ - - 502 5, _ � \ \ \ / / -_ 500 Od-001a0 IN ; !;ITOfVELOPMENT) `� �✓A„✓- IR�� ti :,ANT ` ` 49B'" /ryIOjr Qp�par� \ \ \ k I / 1 , 4, � � � R � / � � ��. ®� I 480 , SF C-0.fi0 \---------- OU ST-36 c=0so �OO 472O C��!/\� I 104 LF SFF 0.25 ✓", - - I-- -"i 1 'I _ '�' -,_ %'lam/' SF RII1G�n �«re" 2� e C_` -.'— -✓ _' �, y ,. l //�,' �� -- A v v ,r LANDS N/F,% CIP j T-3VA RANCES'BREEDEN BR/CWfyEA� AND W/LLARD HOWARD BR/�K/1EAl� I FAM/L Y 7R Er L _ r _WB A, 719 I I 1 \ \ TMP.• 04600- 00 Od-O�B✓d, I /� ; \ ; , . �/ �F /' a A� . �v 1v ZON/NG' Rl l �R4�S/DN L)'I I ` j l j / `I l 1 . 1 e ' *SB-1 „ USE. S/N�LE F�M/L RES/ ENTIAL I �^ F �/ ✓ , �Y --j _ `_`,,T.\` NWT I 1 1 I , I 77 tt ]� PROP. r \ I TEMPORARY TEM PO ) 1 `CIRCLE _ % e""�, ,� I / / / kF10 - \ STOCKPILE �\ IN. ,. 1 >i' / , / - I . \ r` `� 1. t, _r"'.'• 1 1 \ \ -- ll--- a I \ \\ V )J \\ C7 1 1 480 — I I \ \ I \ II t < 0 470 / 1 1 \ I t C=0.60 F \ i , I \` ` \ 1 1 1\\\ T- C-060 I aso aso / -CWP C 0.60 r� ✓�" II i `v 450 B- SOD,.� 1" PIPE FOUND I `, I 05'-A9OVE ORAUE 1 COUIVION AREA OTT 17 �— �\ LOCK ✓-TEit (fWQOQ PHASE 2 _ `' L I WD COMMON EA CLOCK ✓-TEA_KWOOD PHASE 2 / _ FOREST L 4<21-SOUT/f \ KES SOUTH I ; `� /✓� TOWN_N E S FORDS-T 4A (ES,SOU;: � v` D. 42�PG. 383 D B. �7467-�G. 55B G ,' (/D (PL 4NNED �Y/N%/ >f/E�Oh�NT% o \ LOT )�N/NUSEUDNG E IAMQYNL%DE!/ECOP�IENT / 20N E lJSE. \SNyGYE PA�12 X RES10 T%qL Z r /NO PUS �PL4NNED UNIT DE! ELOPM NTH y /NCLE FAM1L1'`RES/DENT/AL / / i \ ` B YJLX( -� �ObTJ PHAS � % / F E5T �4KS SOUTH _ 'J642 PC. 39 - - J HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL E SAFETY FENCE SAF E I ®TEMPORARYSTONE �� r.T.11Y CONSTRUCTION ENTRANC 3.05 SILT FENCE 3.07 RM DRAIN NLOETTPROTECTION IP 3.08 CULVERT INLET PROTECTION CAP 3.09 TEMPORARY DIVERSION Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OAP- 0 PROJECT: V►RGIN►A STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA :31:3] TEMPORARY SEDIMENT TRAP ST BOHLER// E TEMPORARY SEDIMENT BASIN SB 3.18 OUTLET PROTECTION OP ETEMPORARY SEEDING TS TS 3.38 TREE AND PRO ECTIONION TP TP 3.39 DUST CONTROL 60 30 15 0 60 1 "= 60' 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com .4ALTH e.. RTAN YAUUER Lic. No. 0402056625 6, 07/01/2022 j SHEET TITLE: OVERALL EROSION AND SEDIMENT CONTROL PHASE IA SHEET NUMBER C-600 REVISION 2 - 07/01/22 n / / -SLOP SEMENT 6B6 PG / \ 4J ------ --- ------------ ------------- IN \ \ -- IIN - -- --- -------'-- -- - 1 / (r /NNN ' / Its \\ / �t .l'n ig, \ - rtcr�. ) i , r v7 �.r. vrt o.7•so . ` \ \\ `` ` 93 I I \\ _ \� \ o L\4NP.S N%f� \ I IN COPh�PER7Y`/NVE5VFN)S,' I Ts 4600T00 `00 028A1 ,b/ DID, / _ II �\ �\ \ �n ;>i RT`,�RYR� /DEl✓ SIF IN IN 496 00 IN IN TP / DC ---- -- / / — 00 u' / s /DO TS TIP ,r y 13- / me 939 `(ibM\-------- SF / I A \\ \\ '/\ SF 1 $F � o Oda' i (� ✓' / �� / ' DG � ', `, ', TPb S1RUT¶ OOZ.1� soo` _ �A Y Y \ I rs GOSE��60iq C= 0.60 I II l J SEE o PR° , �, 400 LF. SF jC �1 `"'' _ ;�,, �\ J ENCROACHMENT ONTO �•-� '` /'\ \ APPROX. L S2 -EAlETERY PROPER7, \\ /' �r 215 L.F. SF/ 0.25 AC IF OF VEP EASEMENT B.Q, 527 PG. 177 BB 466 . 491 (l B.B. 297 PC i92 �TBlJ �`;14Y DO r /' v Soo 34 ROP. WET STORAGE ELEVATION'464.5 .. v TP TS .RESS EASEMENT \ r ; ' I / / w / \ v (FO) 0029-002-L35 \ 1\�- �' / �' I r DC i / / _ SF TP DD --- \ mC, 11- �\ ='�' O.BF66'P��4,(TBV '� T_2 DID -z / &�O =CUL PERT (19R) < �- T01 X -- -- � tJ tJt�� A APPRO/t'-'COL: A1' -- v\ TP \ If OF/10' VEPCO EASEMENT TP .�� SF /ee" %\ 0..9..;466PG. 494(TBv� \�'' ��-_v v \ /-------- - �',- %NLET(TBR,` \� 498- ✓ 60 ROA AWAY / I �v "toll v� i IN IN IMATCHLINE - SHEET C-602� aILERT ( MATCHLINE - SHEET C-603 ■ I IN \IN I IN SEE INSET SHEET SEE INSET SHEET -604 \ r ` - - IN IN IN / r , zz-� Itto IN o � �� - _. � - /NV=47J28 TEMPORARY 6vN571?1U1CA01#V\ o " ENTVNP EASEMENT /\\\ r / / / eo �' / SF i / �1' p0'\,00000 RP. WET STORAGE 000,/'/' /' // ELEVATION: 477 \ DID 66 i 19TP TS / , SF If HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL El SAFETY FENCE SAF ■TEMPORARYSTONE CONSTRUCTION EN re. �� E SILT FENCE SF XX 3.07STORM DRAIN INLET PROTECTION Ir 3.08 CULVERT INLET PROTECTION CIP 3.09 TEMPORARY DIVERSION DIKE 3.13 TEMPORARY SEDIMENT 3.14 TEMPORARY SEDIMENT BASIN SB 3.18 OUTLET PROTECTION 3.31 TEMPORARYSEEDING TS TS H AND PROTECTIONION Tr TP E DUST CONTROL 30 15 7.5 0 30 1 "= 30' LU z_ D_ W W W 0 z z- D Wz wLu�WU �zwwEL ju ZYCD~0 oj0 " Z' W 2 ,W< WES z U 7 2 u 1 Z F H �zC Q< c z J z 0- 0 �o�W� Q �z�o_< d J OH O U W E- REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AN DIOR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 10/7/2021 CAD I.D.: OAP- 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com .p Lic. No. 0402056625 4r k 07/01/2022 `4ONA1. Eft SHEET TITLE: EROSION AND SEDIMENT CONTROL PLAN PHASE IA SHEET NUMBER: C-601 REVISION 2 - 07/01/22 1 � 1 1 � / I I 1 1 1 I 1 I I I I 1 I / / / � 1 / I 1 I 1 / / 1 I / 1 I I I i \ � l n N I N , N s1 / MATC_ H_L I N E - SHEETC-601 TP i SF 498 ------------------- / I I' � i/I / ��u A V--ate-. �•= I _ _ I _ DC I\ \ - I CWP I - _ \ 466 P.O. COc. \ \ C= 0•60 OF 1d_VE-PCO EASEMENT / A-- DC - -_OB. 466 PG: 494 _ -------------------------- 1 �LANOS N/F TP uy \ \ _ == _ '" /� ✓ /'�\, ERA (tgR) .�` \\ COMMON*EAZTH <oo\,D.B. 063 OE D_ = 1�✓FR %-;" /,BEXI wm� lD4"" ST3A ----------P-------- Oh PU29 EO UN/ U�V - I USE. �\ 22' 60k GRa \ O \ r GRATE INC BRJ o �\ RIM= .14 \ INV A 4 39 INV B 2 �\ I I P 25 LF. -18" CMP WAT gib\ o 01\ CLEAN ER PIPE 0 \,\ rk I` C= 0.60 a\ SF I I I l F I \ 1 ' Doi I \\ // AREA = 1.70 A . ------- C= i PROP. WET STORAGE ��/��— --__ ,_pl, ��qqq E PROK COC �y,J ELEVATION: 473 r/n' , - LEVROP.WETST6RAGE �1 1„ � d� ST 3B 494 POO ESMT ' �Ti n DC / 1 RKE 0; (TBVJ U R ELEVATION: 474 TS . / 1 I 472 AREA 1.65 AG. / q12 T 3 I 31' / 111 C= 0.60 i � � I C 1 /CIPI N I E DU STE \ \ W C7 T-3�� / _ Nf4 wr —HAZARDOUS II it F \ 111 DC MATERIALS STORAGE \ AREA IV O474 1 ' APPROX LOC�— 1 IP C= 0.60 ? OF 10' VEPCD EASE/jlENT ` % D.B. 466 PC. 494 (TbVJLU C dG S, SOLVEN ILL AREA TO ENSURE J WASTE WATER OF DRAINAGE TO ST-3A N AREA AM NI ES J / - l _l \ ' Qz VEHICLE FUELING AREA I AND SPILL CONTAINMENT I � q STAGING AREA. RAIN GAUGE,BPORTABLE RK E TOILETS 1-� _ / 'V� 1 �Tglo / NCRETE WASHOUT AREA ------- Il \y�� / APPROW I OF10'lE,P0 EASE P.B. 46B;P6. 494 5 �\\ X wv I ; TS ram\ X - -IT \ PRIVA ROADWAY (TBR� v � 7f — 1 Ilk \`\ ASPNALi� EX \ FX ---------- --- W------ AGE 1 ROP ET _ __ELEVATION: 467 i DC T I 47D _- y� it 470- \ i DC OF 10' VEPCO i \ \ I I V �,D.9.. 466 Pc 4 C= 0.60 vv v i Ts I ( PED. (TB� /4 CWP 28' AREA = 0.24 AC. PIP / TP s ----- ASHLANO COMMON AREA f Old I 1 V0 0 `oo --- a TP o SF o � � o \ \ x Er AS 11 MH \ 47250 TPV /N = 46381 moo v /NV OUT = 46971 EX 2o:S4N ESMT EX 9" SANITARY \ EX Mh APPROX ZX4T/ON PER AS BU/CT \ PROVIDED BY ROUOA8615/1 GAZE & ASSOC, INC T/TZEDI ASHZAND TOWNHOUSES AS BU/CT WATER` ZINE AND SANMARY SEl!'ER" ?o \ DATED 1012911994 RZY/SED 01/09/1995� o EX AS- Mf � R/M = 46709 HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL SAFETY FENCE E TEMPORARYSTONE CONSTRUCTION ENTRANCE 1 j j� 3.05 SILT FENCE Sr X X- 3.07STORM DRAIN INLET PROTECTION Ir 3.08 CULVERT INLET PROTECTION Clr 3.09 TEMPORARY DIVERSION 3.13 TEMPORARY SEDIMENT TRAP S I 3.14 TEMPORARY SEDIMENT BASIN SB 3.18 OUTLET PROTECTION Or 3.31 TEMPORARY SEEDING TJ TS 3.38 TREE AND PRO ECTIONION Tr TP 3.39 DUST CONTROL 30 15 7.5 0 30 1 "= 30' U Nz LL W W F S W (/ z u Wz Wlgw �zWw� ju zrCD�0 W, ~ W < 2 W >zUWv5C U) 7 m< Q Z< zu)M W ZPF �z < - L, < J W zcf) 0 a< a J o O U W H REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OAP- 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com _0110.a kmv e.. RTAN YAUUER Lic. No. 0402056625 6, 07/01/2022 j SHEET TITLE: EROSION AND SEDIMENT CONTROL PLAN PHASE IA SHEET NUMBER C-602 REVISION 2 - 07/01/22 n - LMATC H L I N E- SHEET C-601� soo \\ / A mo "IOC \\\ ---- [!98 OF/10' VEPCO EASEMENT \\ i�----- �\�.� TP SF ,i, f� V /466Pa.. 494 (7BVJ \��' - --_�� - �\ 1 „ -CRATE V AV A 4.9B'- �!/ / ji oo WAY o _ ) �I K E ,,,CRT -� i o' V SF c' \\ \Y \YNEE7(TBR) �- `�7� i'/' .��6' < /y `\\ \\ �' `� �/' \ TP \ - ' '" / C / ji \ �\ �1✓� �`, I 'I LANDS --------' -01 C `� �/'� PETE� A. I20�L/S iNO 1I/ERA /A ZO[7lfS� �/ \ G' ' G0� / / / . \ \' `\Y'� \\ /`�IAPPROX. D.R. 650 PG'\507 '`, a COG: �� \ E�' , ' / / \,� \\ ,.� / / 1 �' OF 10'`VEPCO LASEMEN7, `TMf • O�600-00-OQ-02MO \\ \ - CO EASEMENT i' / C i " D.B. 466 P 494 (IBVJ / -_ - -- N G. , R?', (RESIQENT/ALJ' \ \\ _----- / / \ `(/S 5 _ FA* Y RE:�'/DENT/AL \ \ GDO I I - ----------------- SF ! \ \ Q w , PRO j AP X COC 1 LilSEMEN 0..8. 466 PG 494 (TBVJ j -/ C\;BR) (reRJ ems' /' % ' _ �' OF /0' VEPCO EASEMENT - --1`v _ N �RJ�611466-P6 494^ , I ,,, " ' OtVE 1T 1 U /SF — --- --. /�itT ,,"—' �\ ,"---- A m \\ - f-------------------- '�/ , " EA`•flLbLrRT'(T�1 \\ 1 �� EX. `�, \, -0.59 AG \ TP— ,.- (TO IRAF�fC S/GN \ C= 0.60 t' r' q� \ / 11 _ ram` 245 LF. SF N ; k } " '(�. C ' � � - �� ---- � � V vvv ,, �v �/ `'---------- � l l ='-G' BOGOAVA �B�r="---- - �� () 5 - -_ y 'a TBR 104 LF SF I 0 2 AC j '' G NAB -' W � ° 1 ��R I v \ PR �j ' i '�' � ,GOLVER� � BALi RA // - 2 _ "_-- __------- ------------ ----' -- I v �APPROX. LOG. - OF 10� �PLO,fASEMENT 494 PG. 540 (16VJ LPRL?X Lac. ��. _ LANDS N/F J C \ I 6_7 FRANCE.S BREEDEN BR/CKHEAD AND ' ? OF 10' V£PL'0 EASE,J/ENT L \ \ �-' •A D.B. 466 PG: 494 W/LLARD'HQIyARO BR/CKHEAQ TEST, ET AL I APPR0.1�` LOG: W 9.. 128I PG 719 U �.`�jVERi �i h� f OF 10' VEPCO EASEMENT\, / l / PEQ (TBRJ TMP' 04600-LiQ-00-028✓Q n \� _ \ ZONING.' Rl (li'ESIOENT/AL) \ OB 494 PG 540 / � � , SINGLE FA RESN L 1 I - U TP S E GO�V�R \ 11 �PEO (TBRJ; ' �� / -- SF S B 1 /' \ V 1 • �,�, �� ,�� APPROX LOG: EJ1'T ,r (iBRYk ---------- AREA \ - i 1 DO oe 4 a PO 540 �VJ /� �Ri = 66..30 ACC �- X X / vI l 1 `,vv / \ Tn,rr ` .-----f1P,PROX. LOG: l 10' VEPCO EASEMENT : O.B. 466 PG: 494 y\ "/ APPROX. COG OF 10' IfReO EASEMENT a \ - � / N (A ' , 1, / \ PROP. TEMPORARY x 1 IN W W W ' O.B. 466/PG 494 (7BVJ 'I W C , / DC STOCKPILE'-x-�_ , <+, PED (TBRJ C31 a , ) ` 11 ,T•rr i-rrri rrri O 90 m ni `---------- ... , F / TITLE PARCEL'ONE f �� C ;-IjlA�C "r\ c 1,' /�/I � 11 11 � APOFOIO� �D LASEA%fNT I � j /' ! 1 Ts HP -PARK LP ' ' ------ A _ 1 494 PG. \ E. (TB\ 1 '-aB. 540 (TBVJ I D.B. 1883 PG 298 TMP: 04600-00 0i)-10900 `-- w x 1 err, rrr "� \V I A A: 670,929 S.F,,6R 15.540 AC (M) \\ j AREA: 15.558 AC. (R) (T \\��& A A I a i rog 1 1 a \ ` �4v `. \ ROP. 36" RISER �JITH \ 460 \\ 1\1 �'� PROP. 130' BAFFLE - / / \ 54" TRASH RACK -Tl � - - ` '� 11 '�•_ APPROA." LOG: ' ^ ---------- ` , 1 �k 450 � _ ` 450 _ R 0 EASL',�/ENT PROP. TEMPORARY 21" 4 540 ,rIBVJ CMP @ 2.5% \ I , NV. 447 B- 1, 12' 450 ', I oC \ 1 8 \ a PED (TBR) \ ,APPROr LOC. 11 V A li V II OF 10' V£PCO EASEMENT COVER (IBRJ `, f O.8 494 PG. 540 (TBVJ �I DO -�SF PROP, TEMPORARY?11' \ �' (i OF 10' EASE E DO I \ DO t Cro1P @ 2.� k ) .446 SPOP�v1ERGENCY V O.B. 494 PG:/ T J I I III Trr' rrTiirrri my `, ') / ! I___�� ,, _ 1"/RONP/PE FOUND -- SF 05' ABOVE GRADE TP S _ TP HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL 3.07 SAFETY FENCE SAF H SILT FENCE SF XX 3.07STORM DRAIN INLET PROTECTION IP 3.08 CULVERTINLETPROTECTION Cep 3.09 TEMPORARY DIVERSION DIKE 3.13 TEMPORARY SEDIMENT TRAP S I 3.14 TEMPORARY SEDIMENT BASIN SB 3.18 OUTLET PROTECTION Op 3.31 TEMPORARY SEEDING TS TS 3.38TREE AND PRO ECTIONION Tp TP H DUST CONTROL 30 15 7.5 0 30 1 "= 30' Z W W W (/ z F W U Wz W19w9 rC9EWpD'o z ~Wax w- >z(.)wc/5 Q Q Z < ej Z (n2 W ZFH 0zaQQ~C Z J � D_co W 0 D W L Q z�a< 0 J 0 O CJ W H REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD LID.: OAP- 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com .4ALTH e.. RYANYAUUER Lic. No. 0402056625 6, 07/01/2022 j SHEET TITLE: EROSION AND SEDIMENT CONTROL PLAN PHASE IA SHEET NUMBER C-603 S65°54'00"W 1025.97' (R) REVISION 2 - 07/01/22 1 1 1 1 1 I I I I I I 1 I I I I I I 1 I 1 \ I I I 1 � 1 l I I I I � / I � ' / 1 ' I I � I I � I I � I 1 1 I \ , I I 1 I \; ` I I /\ I I 1 I \ 1 \ 1 I I I 1 1 1 I I I I I I I I I I JI I 1 I / I - - - - - - - - - - - - - - - - - 472 1 -- \\ 1 \ I I B INLET R/M=471.87 INV A=i46790 , -- --------------_ i---- INV B-46Z22 I/ / /vl III r I 11 I 0 I SEM/NOLE TRAIL - U.S. /4TE,29 �_ -- - ---- _ -_--------------- \\``\ _ - - - --- _ `-----_- -CURB /INLE/ " __ - ___ _ --``-�_ __ � - - __________________________ ____ _ — ---- R/ - - _ CURB-YNLE3 _ - INV A-469.28 i ASPHALT PAVED PUBLIC ROAON'AY \ � _ -------------__ __ __---------- _ ------ -- ---- _--- ---- \ INV 8=46923 \ \ _ _______________ __________________ - �/ 38QL� - — —__ — — —_ — — — — — — — — —____� _--- ------------------------ — — — —� -� -1 - - - ____ -- _ _ _ - c-_ _ _ _ _ -_ -_ __________________________ ___________ _______ __ IP 47bTTF _ ____ _________ ___ _________________________ ____ __ v I- _ _____________ _ � 1 1 __ _T , I T i i �a01 a07 _ _ a0l _ - -a01 a0l LOD TS 2656d'00 -�-�'� — ________________ 2657t00 �LOD� ` + -"---- -- L •� OD--- _ -- If 0 i IOf) LOD — -- ------ -I --- O 1 - X3�L00`L _ �- - ------_ --- / /L - - --- CUR& 5vr l / - �� =477� ; ,- --- - - ------ - I - - ---- - - ........SUM!/ OLE TRA/L U.S. RTf 25 -------------------------- '� \ / 7361' - r\. EHRB-INL£T---- ---- T C7JRB7NLEi-{T8R --- - - - ------------- --\\I --48B.3r---- ---- _------------RIM=48L79 ------------------ ------ -- - _ I - - 1 ` '---- - ' _ ------------------------------- ------- - --- ` ---- ----- -- — ---------------- - ----- '------' /NV 4iT6f � � �• - I 7 n � ------------------------ ---------------------- vR/Mr47A30 / - - — - - - - - - -- -a01 001 (101 dales—aol ao, aol aol-- aol 001 ao 001a0l a0i 001_cjol 7 i --------------------------------------- _ - - - - - -- Z- - ----- a _ — — — — — — — — — — — _� — — = _ _ ------------------ - - - - - - - - - - --- �— — — —! - -- -- - - - - - - - - - ----- __ SF 9 --�+ --- -- --- --- ------------------------------------------- - 8 , (R) 12 all •..0 ENTRANCE EASE �RY CDNSTRUCT/ON � � YW,l E45ZY ZNT R J� --------------- -_ b -- ---- - _ .. e— APPROX. COC. \ OF VEPCO EASEMENT rS HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT „ I t, z EE W LU W (n Z I.-W W z W��w� LU22U-U� C7W W�>W 0 w > Z Fwwz z 0 O U Z) 2 Q Q z Q zU)2 W ZFH °zW<Q~0 Qof J W D� W Z z aQ > a- < of U W H to REVISIONS REV DATE I COMMENT DRAwx er CRECKED er 1 05/18/22 COUNTY COMMENTS PCM RTY 2 07/01/22 COUNTY COMMENETS PCM I Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION VIRGINIA UNIFORM CODING SYSTEM DOCUMENT UNLESS INDICATED OHERW SE. FOR EROSION AND SEDIMENT CONTROL PRACTICES PROJECT V1920 M DRAWN BY:: MEG / PM CHECKED BY: RTY NO. /2021 TITLE KEY SYMBOL DATE: 101 AP-0 CAD LID.: OAP-0 PROJECT: '__________ 3.01 SAFETY FENCE SAF VIRGINIA ---=-=---------- -- _; STORMWATER W ---- �-- ___"___ MANAGEMENT PLAN TEMPORARY STONE (�[ 1 TW \ 3.02 CONSTRUCTION ENTRANCE l/C �E FOR i \ -c \ RST RESIDENCES I 3.05 SILT FENCE SF XX ________--6 266 ----- ------ 2663f00 f INLET PROTECTION _,-_ ___________________ PROPOSED LOCATION. _______________________________ __-- _________ STORM DRAIN ___ 3.07 IP SEMINOLE TRAIL rae�E wro IL -" �1 i4 "' 9 - — — E TRAIL ----------------------------------------- _ - TH RIGHT-OF-WAY W----------- / — —--------- ASPHA\PAVED PUBLIC ROAON'AY --- I --- "-- AL AR OE, A - -- - - BEM LE C O n CHARLOTTESVILLE, VA22911 CULVERT INLET PROTECTION CIP �yy COUNTY, V —001-14001 a0 `---_-IF BO7TOM=47J79 - `--- - = _ f - oo--►=—►- B 0 H L E R // 1 3.09 TEMPORARY DIVERSION DIKE O SF U ;' -M _ 9100 ARBORETUM PKWY, SUITE 360 777 —X - RI HM ND VIRGINIA 2 - X _" ---i CIP _ _ 3 13 TEMPORARY SEDIMENT TRAP O Phone ( ) 93 8200 6 Q - x _ / ---- C O G 3 3 y� 804 8 / F ; j� ST VA@BohlerEng.com 626.68'(RSM) \ TEMPORARY SEDIMENT BASIN SD ® T , N YA R 1pp L31 OUTLET PROTECTION OP .0 Lic. No. 0402056625 no BOA 07/01/20222 3.31 TEMPORARY SEEDING TS TS AL SHEET TITLE: EROSION AND TREE 3.38 AND PR0 ECTIONION TP TP SEDIMENT CONTROL PLAN 3.39 DUST CONTROL DC �� PHASE IA SHEET NUMBER: C-604 30 15 7.5 0 30 1^=30' REVISION 2 - 07/01/22 n 1 \1'<! ;`.---_�,;))� r i ice' , , I / _ 1 U" , , t yr i I / T __ ' '�1/ Q ' I v 4'--------------------------- .Y ---------- - -- — L �- �0 / 4 -- ---- ---------------------------------- ------------ \ __ --- --- -- -- -- ------ ---- -_ -- PHASE IB SEQUENCE OF CONSTRUCTION ' 1. CONTRACTOR TO BEGIN MASS EARTHWORK OPERATION TO REACH PROPOSED PAD ELEVATIONS. AS THE F EARTHWORK OPERATION IS BEING PERFORMED CONTRACTOR TO ENSURE THAT ALL TEMPORARY DIVERSIONS d ARE MAINTAINED TO KEEP RUNOFF DIRECTED TO THE EROSION AND SEDIMENT CONTROL MEASURES SHOWN IN C7 8 % / \ PHASE IB OF THE EROSION AND SEDIMENT CONTROL PLAN. Z-Q, a 2. CONTRACTOR SHALL GRADE AND BUILD THE SIX TOWNHOMES PROPOSED WITHIN SB-1 LAST SO THAT SB-1 CAN U.1 § S REMAIN IN USE UNTIL THE SITE ADJACENT AND UPHILL OF THE SEDIMENT BASIN IS PERMANENTLY STABILIZED. W o (f) 3. ONCE SITE IS STABILIZED AND STORM DRAINAGE NETWORK IS INSTALLED AND IN USE, CONTRACTOR TO MUSK OUT z FCC U ti SEDIMENT BASIN AND OVEREXCAVATE TO UNSATURATED SOIL. CONTRACTOR TO BEGIN WALL CONSTRUCTION TO Z W H z W > \ BRING REST OF SITE UP TO GRADE AND FINALIZE TOWNHOME PADS. W _�_-' ,\ •` 1 \ 4. CONTRACTOR SHALL KEEP ST-1, ST-2, ST-3A, ST-4, AND SB-1 OPERATING UNTIL SITE IMMEDIATELY ADJACENT AND UPHILL (D Z W W W j W w y OF THE SEDIMENT TRAPS IS PERMANENTLY STABILIZED. Z U W z g s FW Q2 WZ 5. CONTRACTOR TO BEGIN INSTALLATION OF ADS SYSTEM 1. J> Z U J (A U 5.1. STORMTECH MC-7200 CHAMBERS SHALL NOT BE INSTALLED UNTIL THE MANUFACTURER'S REPRESENTATIVE HAS j Q Q Z Q =N COMPLETED A PRE -CONSTRUCTION MEETING WITH THE INSTALLERS OR PRIOR TO UPSLOPE STABILIZATION. Z J) W Z F F § 5.2. STORMTECH MC-7200 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-7200 0 Q Q Q H 0_ g N CONSTRUCTION GUIDE". Z I- U &o Q CO U U d w� 5.3. CHAMBERS ARE NOT TO BE BACKFILLED WITH A DOZER OR EXCAVATOR SITUATED OVER THE CHAMBERS Z J O p W <g STORMTECH RECOMMENDS 3 BACKFILL METHODS: J a Z a Q a / 5.3.1. STONESHOOTER LOCATED OFF THE CHAMBER BED. m _ Q o _ 5.3.2. BACKFILL AS ROWS ARE BUILT USING AN EXCAVATOR ON THE FOUNDATION STONE OR SUBGRADE U 5.3.3. BACKFILL FROM OUTSIDE THE EXCAVATION USING A LONG BOOM HOE OR EXCAVATOR. U.1$ 1 5.4. THE FOUNDATION STONE SHALL BE LEVELED AND COMPACTED PRIOR TO PLACING CHAMBERS. I_ 82 - ---PROPERLY§ Q JOINTS BETWEEN CHAMBERS HALL BE EATED PRI R T T NE. '-_ 55 JO S C SSS O OS O O 5.6. MAINTAIN MINIMUM - 9" (230 MM) SPACING BETWEEN THE CHAMBER ROWS. s 5 5.7. INLET AND OUTLET MANIFOLDS MUST BE INSERTED A MINIMUM OF 12" (300 MM) INTO CHAMBER END CAPS. < 5.8. EMBEDMENT STONE SURROUNDING CHAMBERS MUST BE A CLEAN, CRUSHED, ANGULAR STONE MEETING THE 8 AASHTO M43 DESIGNATION OF #3 OR #4. _ \ I 5.9. STONE SHALL BE BROUGHT UP EVENLY AROUND CHAMBERS SO AS NOT TO DISTORT THE CHAMBER SHAPE. STONE DEPTHS SHOULD NEVER DIFFER BY MORE THAN 12" (300 MM) BETWEEN ADJACENT CHAMBER ROWS. 5.10. STONE MUST BE PLACED ON THE TOP CENTER OF THE CHAMBER TO ANCHOR THE CHAMBERS IN PLACE AND �, •` \\ `, 1�4(✓Ds`W�.E %: ,' % PRESERVE ROW SPACING. REVISIONS - \ --- - -- 486 \ PE(�7X'1A!UES.T �T�tL \ - - _ , , / 5.11. THE CONTRACTOR MUST REPORT ANY DISCREPANCIES WITH CHAMBER FOUNDATION MATERIAL BEARING / \ _ CAPACITIES TO THE SITE DESIGN ENGINEER DRAWN BY %.IIII \ \ — — _ _ %\`, - , i O III '' - A ``'` \ `\ `, \,7 L9 i I',-'i I I l r REV DATE COMMENT _ - \ ------------ ,,, " / _ _- - m `\`,` , `� - - 1 1 \ 5.12. ADS RECOMMENDS THE USE OF "FLEXSTORM CATCH IT' INSERTS DURING CONSTRUCTION FOR ALL INLETS TO cxBCNED er \ / _ �r •Q B��G-3B - \ %%/ /i I C 0.60 _ 9 __ _ o ` , \�� `Y�� d1 ` PROTECT THE SUBSURFACE STORMWATER MANAGEMENT SYSTEM FROM CONSTRUCTION SITE RUNOFF. PCM __ ________ ________'" I I �, � � _. ` ,� ,\�d `1` ( i ; ; i 1 05/18/22 COUNTY COMMENTS // \� �' %a°'�/� I 400 LF SF � S I _1 .. \. �'p\�'"j}1)'�;,� ��ii . ` RES)D�, L� \ __ - _--_____ �— / \`, `(,lL.Y RENT%AG RTY - -- -- j / /- �� / - / / ` ` - , SEE SHEET C-908 AND C-909 FOR MORE INFORMATION REGARDING THE ADS STORMTECH SYSTEMS. TM --' �` 'l /i' " //.'' m = /49 _ - \ \ `. I 2 07/01/22 COUNTY COMMENETS _ j' C-0.60 `I '`; `` , \ •I NOTE: THE COUNTY E&S INSPECTOR SHALL APPROVE PREVIOUS PHASE PRIOR TO THE NEXT PHASE COMMENCING. _ \ _ __ � —V - V . ` \ i'O / ' � \O°1 �Y✓/ , �j. � / ___ � -'"� i � � � I � b, l i' i j l i i i `, �l , , , , .. ; i � �� r , , A, A v , V v %/� ,V __ \ \ I I✓ , O 1 \ _ \ 475 / , r \ \ \ 1 \ , \ '\ II \l \ , , , \` \\ `, \` GO60 _ D U /1 400 LF. SF _. _ - � - 1 l' ! `.A ` '•` v`v 'vA \ \ V `, � - � �' ', '1 I '1 '' ` \ \ I I 01 - `` IGIBW what's below. , CBII before you dig. p '\ ALWAYS CALL 811 HATCH LEGEND _ _ It's fast. It's free. It's the law. _ JT � \ \ / MANAGED SLOPES i ' %� I' � � �_�, zTH OF ,, _'-_- � 4 NOT APPROVED FOR / i i'// i' irii I� '"� 20�•'� l �i. i BB� i r / _ �j1_ h - 5�� - , ,' i i / 66 ` \ / PRESERVED $LCPE$ / TMP. 04BB9 Q0 OO d0 `'�� ,\ � ® CONSTRUCTION �PLAN/J/ED,%!/N�T11 1, - QR ENT)! 4ae / l\- • \ ` r n , _ \' _ ,' \ ` �` PRESERVED SLOPE FIELD -VERIFIED �\nl,` 1 (/,�`E 11CANT `\ \ \ p9ti-- ______ � i f ' ' `` _ ��\'\ <25%PER SLOPE PERCENTAGE EXHIBIT THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY l ` ` , / I ' ` �y \-T \ \ REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION /" •, �' /�' ` - s-_-"-�\ ` DOCUMENTUNLESS INDICATED OTHERIMSE. 1 95 V + PROJECT No.: V192076 95 z'' -' - / �.� � _ I i ° � DRAWN BY: ME G / PM i \\ d'�ils � I - Al 1 D.�-- ---- ( O 1` _ -------------- - OC / ------------- - - --- _ I ' ' j'/ i / �'% bLO � � 1 \ ` (']\ \I 49� _____ - -- ✓�• ' , 1 I ' ' ' 487 ___ -- _ J'� � I j -- - `- � 480 I O� /� - _, - - -_-_ `- ------------- EA 1.22 AC - - ` •` vI, 1 _ 40 ,I i i ; ', l ,ri> �V A 11 465 1586LF.SF T-3 'I 25L .SFI0.25 AC ID \I\ IIII', C=6.60 47 I I I 1\ I I / 1 I I I 1, / I I I \ 1 \\ y \I II II"`;\ 1`\` ,, Or 11j i O -_ - _ -_- /; ; / / I IP III oa _ _-- _____ __ , 1 � 490 ST-4 0 T_ � � i'1� c=o6o A ' _4 p \ -----`--"""-- USA•-:§YNG�E" LANDS N/F I BREEDEN BR/CKHEAD AND / _ - -{4fUb4�0 HOWARD BR/CKHEAD 482 - _ FWIZ Y TRUST, ET AL - - - ` 128 PG 719 ,TMP.• 04600-00-00-028✓O � 1 h 'v` o \, \ \ �� \ZONWO.- R1 (RES/DENT/ALA USE- ';51NGLE FAMILY RESIDENT/AL 9 � r \ I r a I I - B I ' 476 I ' I 1 ' 475 I , 470 If I 465 e 460 I 1 I I ' I 'I Il 44 450 SB- 450 < ^ 1 "IRON PIPE FOUND 05' A901'F GRADE _ --, _, ,. -_- J \ ll�9Clj (; cHK w i✓ r'.r I t <_, BLOCK ✓-TEAKWOOD PHASE 2 _ \ EST, SOOXt� F . . 4 KEPS SOUTH \ Yj l'l D 2 G383 558 j /;;F//Yi�61t LOPMENT� 20N/NG• PUD (PLA WED UNIT OPMENTA // USE:F�b1l }'.'RE�'OZ*7/AL LOT 18 �£1�ELOPMENT� / ; \, BLOCK!✓ -TEAKWOOD PHAS 2USE. S/NOLE FAM/LYRES/%SENT/AL Y_ _N,T/AL; / �F, FORFST /AKFS' .SOUTH / VIRGINIA UNIFORM CODING SYSTEM CHECKED BY: RTY DATE: 10/7/2021 FOR EROSION AND SEDIMENT CONTROL PRACTICES CAD I.D.: OBP - 0 NTITLE Y SYMBOL PROJECT. O. KE VIRGINIA STORMWATER H SAFETY FENCE SAF MANAGEMENT PLAN FOR H TEMPORARY STONE CONSTRUCTION ENTRANCE lJC RST RESIDENCES H SILT FENCE SF XX PROPOSED LOCATION: SEMINOLE TRAIL 3.07 LPROTECTION STORM IP AND ASHWOOD BLVD. A INLET 2 CHARLOTTESVILLE, VA ALBEMARLE COUNTY, VA H CULVERT INLET PROTECTION CIP O BOHLER// H OUTLET PROTECTION OP - O El TEMPORARY SEEDING TS TS El PERMANENT SEEDING PS PS O 3.38TREE ION AND PROTECTION Tp TP H DUST CONTROL 60 30 15 0 60 1"= 60' 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA 23236 Phone: (804) 893-8200 VA@BohlerEng.com LTH OF 2 V N YA R y .0 Lic. No. 0402056625 4. 07/01/2022 igr SHEET TITLE: OVERALL EROSION AND SEDIMENT CONTROL PHASE IB SHEET NUMBER C-605 REVISION 2 - 07/01/22 ;- v lJG es�?c 4; ------------------------ _____ _ \ \ - \ 1 \\------- `\ \--__-------- _ , / _-1zb Al 00000 SF , ' - ` / 34 - - / I C- 0.60 �\ TS , / 215 L.F. SF/ 0.25 AC _ ,\\ f k I el ,- TS ♦ _ - ----------- NZ 1000 00 SHEET \ \ / --" Ng Al Al% \\ TEM,0ORARY' LvNSrRUCrI iII' `\\ \ 1 'i / \ •� '� ENTRAN/' EASFMEVT ' DB 4699100. 4.3 \ \ 00 \ „ / - -- \1 PROP. WE STORAGE -" , ELEVATION: 47----------------- 7 \•\\�\`�` / / / q) 66 , C= 0.60 TS _ TIP------------- - 4� r r SIF SF TS 5 1 - A r , \ h o 0 y OF/0E�E"r 0�9� S F --- — / _ ----- I / / gM1' A /T Eft pa9"I ' �Ilk V° C= 0.60 \ 400 LF. SF _ y � j ` 215 L.F. SF/ 0.25 AC Z a7 4/ X1 G k ---- _ __ - -_ J------------------- ---------------- J MATCHLINE - SHEET ■ --------- - ■ --SOp DC DC I / TS '500 48s 34' I `\�\\\�A 1 FZ PkW TSTORAGE EL NTION: 480 ` 1 a SF \ _ a / ^ T P I T P \ ST_2 \ — \ MATCHLINE - SHEET C-613 HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25% PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL 3.01 SAFETY FENCE SAF TION ENTRANCE ESILT FENCE SF X X 3.07STORM DRAIN INLET PROTECTION IP 3.08 CULVERT INLET PROTECTION CIP 3.18 OUTLET PROTECTION OP 3.31 TEMPORARY SEEDING TS TS 3.32 PERMANENT SEEDING PS PS 3.38 TREE AND PRO ECTIONION TP TP E DUST CONTROL DC pC 30 15 7.5 0 30 1 "= 30' U z a w w Z F w o � u Wz Wlgw �zWwUL ju ~wax0 w- L_j>zUwv)C Qz< u00<CL—FF z,<Q c < W cf) LU 0 Z) w L Q �zUa< > o J o O U w 1- REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OBP - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com ww _ TH pF` c� Z V N YA R y .p Lic. No. 0402056625 � BOA 07/01/202��1�� SHEET TITLE: EROSION AND SEDIMENT CONTROL PLAN PHASE IB SHEET NUMBER C-606 REVISION 2 - 07/01/22 111111111 N I N 1 N s1 �; � ,' _- --- \ , -- -y--- - - - --- ;; , ' „ ;. �_�` I I I 7'/ / _____ _____ i / / / __ \ i ' ' / / / / I _ / ice\-- \`\ �\\� ��_ I l I / `\ ` _,//'I1/ j i j// i/ � / // / / i __ __ - --. `\ \ \ \�_\ \ i i i / i i / r /� �/�`', / ��'' / 7 i/ ll i � , / II i ______________ �/'___ - '�� TP _�505'\ —� / I �� I I vv 7il' /'l �. .' 1 ' I '__ 0 `\ \ I \ i i i ( � I I \�: i i i i I i' i i� 7 / i i l ' / l II i __\_ .-�� ____,,;' - � TP ' __ � \ I \ I 1 / - , I I ,III / ,' I I l l I � \__ \`�\ _ _- 1 \_ �\ __ ,I II I V / I I 'I \\ ' I � I .r � 1 � � V AV \\ I I I 1 A\ � I I / 1 - VA � , p�� '� 495 / � h '� s � \ vv I v • I � v I � 1 , _ vA po,9 N. � � , I I \ \ 1 1 I • � I r A A A , I � ' ' ' / C _ � \ \ �. . f \ � ., ,v � .v ,v 'v / ` a _ _ _ '', ,III ..�. _ ` - _- v , _ i , , , V dl � , _ _ - --- J ` ' ' � � ` � \ � � ` ` I ' - / , � � III\` iL�J ji ---• --� a ------- �`� - __-- `oo -- --- TP ' SF ...-\ o � �\ o � `..,. \ x \ \ // I , / _ _____. , -___ ` __ ' �- -' _ �J' % � / �, � 1 \ram -, � I\ ' \________________________________ _ ___ _-______ - '-- -_ ___ ___-_______________ - TS --_- _ _ fo O` h�' `��\ , i , l T .'' v �� .- �- A I vI � �' _ _ -_ _ _ _ , //"- / _ _ / , /,i/,,; ;, _ „ � % / / ' � 1, I m -o�. � \ \ O --' '--- ----- � _- � '-- � �_ -'" --' 1 � _ / `' / EX 20 SAN ESMT' , _ ''': , _ _ __ _ .I / , c� o , 1 \ _ _ _ - / T � _--__, 1`I gw -� '\ \ \ �'---- --- --' ___--___- �---__-_-\�\ - - Oi - ;%' -'/� 'I '; \ EX 8""SANITARY / / / / �o�y. �. ,r* � � � ,----"---_-- � ____- __ _ ,` � �� _ --,, /_ APPROXLOCAT/ON PERAS-BU/LT � / / / / / \ \, \ '�' o � O \ p � \�, '\ � �� ''-' - _ --- -- - \ / -__ __ __; _ � -/'''� PROUIOED BY ROUOABUSH, GACE & ASSOC., /NC _-'_ ,. � � �. `\ \ \, � „_ a1 �j '�, � ' --- �, - _- __ - __- � 4g5 - - � �,''� , -- T/TLED� ASHLAND T04YNHOUSES AS BU/LT WATER I I / / / _ ( / / 7 1 � / '��-_�' \ \` I' 0` \` ` IMO/' SALT \ RG A- - TP ---'- _ -- --- - 5 \ \ - - — I -�_--- �, � . ! L/NE AND SAN/TARY SEIYER" I I I �\ '` � ` � � � - � -__ _ / / "_ _ - I a � � I / ` DATED 994 REY/SED 995 j j I j i ;' ,% � ;� ,,-. �'� \ � .II I � � ��` \\ o C��9��OE�• ',� 65� -- ----- __h __ \ / ,, � lD/2a/� D//a9/� t !o \ o \ ., �. I _ ST- A �� ., �. � ., � � I 'I I � � �ON / UD� (f Lill,' E ( D �-''-� --" ----- "? — , ,. - - I � -_ , �, '�. I 'I � I \USE,• ---- -' / \ _- / -- --- - AREA =1.9 A ' ' / - "� �� I / , , , , , ` --' '" l I ' / � I / I V . i ' � - / / / V � � � � � � ___ � . i / i � i i O N J PROP. WET STORAGE � �`� �_� ___- ��' ' i i i / , \ W \ `- ELEVATION: 473 �' � _. - , => - } / � i II 1 / 1 \ \ - -, ,¢ - � I I , I I `V A � .�, �, 1 LG� I I v � _____ -0.� __ I ' _ vv Iv � � � � � - - � - TS I � I I / \ \\ 1\ 1 � I II I � ` \�'_ � I l l , i/ \\ \ \ I \ o",, ! CT C 475 /� ''� `\\' l I i i II /, % / I, /l /, ,.� �—�\ `\ i I � \ I '\ ��"', $ CXl � I 41� �� J ' I II I i � it / / � / / / / � v � I 'I I C10 Ci\ 0+ 64_ __ � I' v i II � i i i i ____•\ \ \ \ \ I t \ I �1xx' \' ' _- ' I P 25 LF�- 18" P _---' T i \ I / , ' i , / - \ \ \1 i �\ `\ �C\ ` ' I r CLEAN WATER P � � I i i I i / I I I �' /' /' i i � ```\ \ \\ \ \\ it '\ \` �\ '\ \'-�' O 00 � i i I � W I � , , ; ; I ; �,V A AV , I A \ � , J � _> _ I I � I r ' i i ' ' \\ `I \ `, \\ `\� i\\ '`\ \\ AZARD i DG i ' ' I I i v v vI v ii�l r� v <$ �_ _— __ " � MATERIALS ! II I ' I I , ` \ , ' II In \ \ �` � � STORAGE 1 I I I , � I Iln\ t\ � , �' TS 1 , I 1 1 I, J 1 , I II V, A �� l 1 I 1 I �'' 1, 1 III�IIn \\ \ \\\\ � \\ / py� I I r r i 1 1 II IIIA A \ �V I �: 1' � 47 • ' I i � � I � , II i li Ili `v `v `v � `v ` ! , 1 _ i� -, IP 2 / ' i I i I� I Il�ill vv `v ` v � � 'I ,' i � ll �'�' / ' ' � � � I v`v y iliil V `v A V� � ',/' O �� SF � SOAPS4DETERGENTS, SOLVEN \ u I II I \ \ \ \ \ ;`� . � 'I, � \�` AND WASTE WATER OF Z /� / ,% \\ / 1111111 \ `\ \\ \\ � \, � '- CONSTRUCTION AREA AMENITIES �'� I n III r `r I I \ II II II gyp\ r r \ r \ / /. / _____ / \ III IIIIII\\ \ \\ \ \ \ 1 I Ili � %C O p // / I , v,Illnll I V `t `v `v `v� vI Iv ,______� �, �� a VEHICLE FUELING AREA � 4a0 I II nu I \\\ r \ � r i T / I cull \ \ \ \ u AND SPILL 2 \\\ / 'llilhl I^ \\\ \ \ \\ \ `\ � � 1� \\ 1 SF � c CONTAIN ENT\ � / / III IIII II\ r \ \ \ � r \7 In IIIIIII `\ \ r \ \ \ \ r i1 p III nu l' \ `\ \ t `\ ` O I -' _ ' 4 ,. (IIIIIII II V A A A A,� \ / � > / .\ , _ ,, , ___� Illllllll ll , \ \ \\ \ \ , \ \ --_.,II IIII rl `\ , \ , , \ �' I Ilhi iip v v `v I v I �v �� // I ��_ '��Iryllllll `V A `V A A` I A A // I I 'I \ \ \ \ ' _/i,�O IIII \ \ \ \ \ \ ` I I f i I / - Ilnll \ \ \ \ \ , \ I \ 1 o CE STAGING AREA, RAIN III o IIIIf\ \ ` \ \\ \ \ ` \ I'-1�`` 1x,'�. A GAUGE,BPORTABLE I I `* .-,. ' / ', ,/•��J \ \\ \ `\ \\\ \\ I \ \ � ' TOILETS � • ' %� , J \ \I I i I I I I �\ `\ `\ `\ \, I I `\ `\ I / ' i � i � i I \ `\ ` `\ \\ \ It \ \ \ I gF p1� CONCRETE WASHOUT i - � �' r \, ,\\ \I\ _ I - i - � � / I I IIIIII I\ \ \ \ 1 \\ \\ 1 ` rOx / AREA I ___ I 1 I I \ \ \ \ \ I / __ -- IIII 11 \\ \\`\ \ \\ \\ `\\ �� _ I ---- ----- _ -/ ,/ IIIIII` \\`\I\ I\\ \\ � ___ --- __ _ ��G� _-_ I r / �_ _- I \I 1 \\1 � � _ _ __ - I - _ i - I � _ � _ � I - _ - � I I I v \ \ `\ \ 0. r - _ -- _ _- � \ \ - ' - ` _ '`• I _ _ I - - \ 1 _ - _ _ / / II _ 1 _ I \ � - _ / i I \ _ - _ - _ I I \ \ \ \ O I I I _ - \ O I - - I \ _ _ - I I` I \_ _ I ' I - - I \ \ 1 \ _ / _ 'I \ - _ __ _ _ / _ \\ \ 1 \ O � \ _ - _ I ---- / 0 - � / I - - �- I _ I 1 DC 4 - - I I I _ - _ - I I 4 ' I I - _ I \ - - - / / -''- -'' '' �-- / / _'-- '� _. i i I i I\ • \� � \ `\ `` \ \ I\ `, \,\ � II / I � / Iq - I i I` i l , / -- --_' --' --'- / _ '- / IIII ... / \ .. I , \ \ \ \ ` I � � I I I ' TP < \i / -/' -i''' _ -i'" � / / _ _ �-''' �-'' / / -_ II I� III II / `. I `I I\ `\ `I I \ � I IIII I I I � . , 1 I -.. - / III' \ 1 I1 ` \ I '' 1 i I SF I i \ i \ I I ___, / / / - '' - _-' / / --'' - i _ '_... l r \ 1 I1 IIII I I , I ` i I I I I I I `� I \\ i , I( II I I IIII@I I _ i / / 1 ,' ,I' ' � ,' � ,- ,- / / � �� I, `, III BF �I I v I � � I � I DD � � 180� `v c I II I I �J � ' i �� / �' 111j I r I I J III ___ __-_ ��-\ ` \\ � I ! I i i� � ' ' ' -� --� - � � � .IIII , l 0o I I ICI I � � _____ - - _ ,� � `v / ', � I ----- - %; % / ;' %' �' , / ,' �' / 1 \ I!'II II{1'I III 'I ' I li-------- - --- \\ — — - - - � % / � / ' � � ` 'I 'IIII I i -- - ---- ,I � I I �,� , ' I I � TP _ — �.. � n , , , , , , ,.' , , ' � / , ----- - _ , ' , _ _ ------ I P __ - G T " `^' � I , / / /'r t \ I. o ROP WET STORA E \ DC � S �� I II II 1 � � _ -- - ---- - I L T I I ---- - - � I -- 10 ' / , , , � ,,' ' / I I N I I r ' �. ,' , , , , -- ' I E EVA 467 \ 1 Tg I AAA' I I ' / 'I 'I � t I , , -_ �� I I, I. I i I I I ___ , ' '',, � II k I I I I I r '& I AR .�� _ � v DG = I I I I --- - --- - __ - - - _,, ' / ,,,� �I'�.- k � ! i � � III I' I'II C= 0.60 _I o .�$ ,�' `,A _ _ , ' ;' -- - J — I - _ -- - - -__ ,' ------ " --_' I ,; , ' 'i, � I . . ; I I I, II T � ; C 0 60 II I II _ ;;,; _ ----- / -- - - v. I -_ 6 I I I I I / I a \ I �— __- '- ' ' I C I I I R I _— � � A 1 I -- _ , --= - - -- - I � I I ', � �� 37 � _ I _ - _ _ '� F I I I I 1 -- — - � - / � ' � �I I I � I , , , �. III � I --- _-- -- �, I __---'�/ / `, %-' � 1J / i i i � SEE INSET�THIS SHEET IP �� ' � / I -- - __ - _ __ _ I ,I , � ; ' - - I ; � ' �� -- -, - \ 58 LF. - 12" CA4� ' -- ,� -' _ , I II - - -- _; _ _ .� � I ii' _-- I I I � I '--__: / i ' ' I I e ,j * 1 e/ CLEANWAIE PIP '1 , ��_ _- - -- -- '' I , -" SEE INSET ' ' � ,' �% / � _, `' — i i THIS SHEET �` 1 i�'�O�s - _/"7 480 � _ / � I � � '/� // I i � i� � `\\ o III `C�i _- �/ 48 0 1 , ,' I , I I I .� ,' -_ __ , __ ' :- ,' ';� * P -- `�� .� , ' .% ,: ' :� ,, � � II / '� � ;' ' i ;" ,' / i \ \ _ _ >_ AS-11 MH = 47250 /N = 46381 OUT = 46J7> EX AS-10 Mf R/M = 46709 HATCH LEGEND aMANAGED SLOPES OPRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM POR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL 3.01 SAFETY FENCE SAF ® "��d ��. 3.05 SILT FENCE SF X X 3.07 NLOET PROTECTION IP O 3.OB CULVERT INLET PROTECTION CIP 3.18 OUTLET PROTECTION OP 3.31 TEMPORARY SEEDING TS TS 3.32 PERMANENT SEEDING PS PS 3.38 AND PROTECTIONION TP TP 3.39 DUST CONTROL �� pC 30 15 7.5 0 30 1 "= 30' z w W W U z F � u Wz W��w wC7gU—UO C7zwwcn ju ZrCOt=wpIYU ~wax w� �>zUWv�C � 7 � Q Q Z < Z (n�wZFH �zaQQ~C Z J � � � � U � 0 � W e Q �z�a< o_ J D O U w H REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's bBIDW. �311 before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OBP - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLER// 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com ww TH pF` c� Z V N YA R y .p Lic. No. 0402056625 � ��.o o7/ov2o2z�� ` TONAL SHEET TITLE: EROSION AND SEDIMENT CONTROL PHASE PLAN IB SHEET NUMBER C-607 REVISION 2 - 07/01/22 m N I N , N s1 EMA::T:::C::HL1NE - SHEET :C:�611 - = -- - C= 0.60 IN --- IN 1 — 489IN IN IN IN �� /•�' //\ / / '1 II' r\ \ _ 495 _ / `� / ' I /IN IN IN 1 / 1 c \ , ----------------------------- - ------------ 487, - -- ----------------- I _ -------------------- �C V -- 'iIN /------" \ TS ' IN DC Ts — / \IN — / --------------- IN IN ----- 11 ----------- 1 _____ IN 'IN Z1 IN ININN IN I 1 1 1 / I ! 1 (/ I 1 1 ! 1 1 � , '1 qg5 ' 1 1 I 3 ' 1 11 , i 1 _ IN IN eo \ \ , IN / R 1 — 465 — IS \\ \�� IN \ / C= 0.60 / l IN IN IN DC Ts IN\ IN IN It \\ \\ \\ IN l / r / / , , i' i �' iIN I / ' ' \\ \ ,IN \ \ / I , ; , , , , / ' I ' �� IN` IN I IN --- -- \ A'19 I \\`\ \ r \\` \ \1'\ l', IN/ --- \ \ -\, '\ \ \ IN IN DC 476 \\ \ '' ' ' 11 IN IN - vie PROP. 103' iPPI� �... 161 oMP DI, INV. 446 ,1 1 �I�I/Jib • 1 0 1 • IN I \ \ I� \\`\ \\\\'1 \\\\1 \ IN I \\1 \ IN IN IN \ IN IN, \\ '\ \ IN 11 1' 1, I `, \\1 `\ \`\\ IN \ TP \\, `\ 1' LAND N F A� /E J7. ��Pt z/ �QN EY�APH/A\\ZO[7L�S� TM� '',0¢6�JO�OD�dQ—Q2BAQ \'\ IN I -- \ ` SFIN IN 'IN I I\IN I I '1 1I I IN I ININ I IN -f 1 ------------- ' 1 1 SF `=\-------------------- TP O 1 EA =1.22 AC ---- - - �. C= 0.60 - ---------------- -- 1 586 LF. SF ; ' /-_---�`\ \ HATCH LEGEND ')L . SF / 0.25 AC `---- / \ 1 MANAGED SLOPES 1 / 1 1 PRESERVED SLOPES --- - PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT LAN l -fI—?Av �-BREEDSN-RR/CA(HEAD ANq l i VIRGINIA UNIFORM CODING SYSTEM _-- W/LLARZ;' / RD 9f ICKHEAD FOR EROSION AND SEDIMENT CONTROL PRACTICES FAMILY T%NST, ET AL I rW.B. 129IPC 7a9 I NO. TITLE SYMBOL aga• O4600-�-00-'''p2a✓a KEY Z01V11,VG.• R1 (/DES/DEFT/AL) U TP S//tICLE FAM/�Y RE9YDEN,�/AL ; ; SAFETY FENCE SAF SIF 3.02 TEMPORARY STONE CONSTRUCTION ENTRANCE �!C 1 , SILT FENCE SF X X IIN 1 1 \ 1 1 1 , (O (S1 O '1 `, O STORM DRAIN Ip ill �l^ _0 1 1 , \ 3.07 INLET PROTECTION 'v 0 1 ', 1 Lo 90 O 1 1 ' �, `1 '1 '',:308] CULVERT INLET PROTECTION Clp I, I 1 1 3.18 OUTLET PROTECTION Op SYSTEM 1: I I PROP. t 87,000 CIF INI ; UNDERGROUND DETENTION SYSTEM WITH ISOLATOR ROW NN\kI O \ "I I :33:1] TEMPORARY SEEDING TS TS I , \ � I 1 PERMANENT SEEDING pS PS \ t \ I 1 " /RO(✓ P/PE F0UN0--' SF 0.5' m�WE TP ✓ \ L s_ TREE PRESERVATION Tp TP AND PROTECTION E DUST CONTROL DC pC 30 15 7.5 0 30 1 "= 30' LU z a W W z W co z Wu'2F � W w u WC7gU—UO C7KWWcnju zr<Eo 'o W \-,= W >zUwc/5 Dof tnZ)maQz< zcamwz_FH uzo< ~c c/) W < W co 0 Z) W e z�a< o J o O U W 1-- REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OBP - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com ,4 kmv e.. RTAN YAIJUER Lic. No. 0402056625 6, 07/01/2022 SHEET TITLE: EROSION AND SEDIMENT CONTROL PHASE PLAN IB SHEET NUMBER C-608 REVISION 2 - 07/01/22 111111111 I I I 1 I/ 1 \ I I I � I 1 � I I I I I I I I 1 I 1 I I 1 I I Ir / 1 I I I 1 I 1 I I I 1 I 1 I I I 1 I I 1 I 1 I I 1 I I L I 1 1 I Ir 1 I 1 1 , \ 472 - \ 1 `\ I I I ! � ' 1 I , I I / ' 1 � I � 1 / ' I 1 1 1 r I I I A I klM=eTCat --- /NV / , I i l i I / o / I , 01 r(� 1 \ I I I I I I I /��//qy E CURB I LET I' `I � - =4 I \ dSR IP /NV A 6928 I I I / V =46927 I N B , I 1 n0��n0� 007_ OOl- - / r 2656100 _ R/M=47776 I#V`A-47361 /NV B=47351 \ ; ` •\\ ``�NlNl1111 1\`\• •\ `\ 11 1 1 '1. '1 1 I 'I j , j , J M�1 - - '/ I _ __ --__ - _ / l/lll�ll' I I \ \ \ \ `_ - ` I I, \ \\ - _ I I I im ---------------- _ 1 - -- '- --- -_ - `- '-- - ----- - - - _ ----_ -_------------------------------ - - �i -' '----------- '1 1 I-------------- �001 LOD 265E+Odl — ; ( ; 26599 00 2660t00 ----"" �R4�Lp9� - \ 266{ A00 'i —� 1 I-" -----'' i f _----= -__--- _ - - - - -- - - - - --_-- -- --- - - - E -_----___-_----_-_-_- - - - - 1 1 - _ TE.26 \ - - - - ------_-_ -------- I RA/ US, R - E - - -- - - - -- — 'y -or vl r S ----- - E' tih II',r----_-_----------------------- -- ---- ---- ------ -- ' AS ACT Alf-O`PUBYC iv '� - ------ — `----- _ ----------------- v 80 = -- / O 1 \ I 1 � SA SF x x- % I -dP IX11�11\M11 M 41 i7 \ i X SF Sq - / —-- 485 -- — - - W W V U) W Z .J U T P IP Aa- r 2 7 lj CRATE /NCET7"/ —d yill 1, �-_`- Ol OOl OdT _ OOl OOl OOl OOI ,, '" OOl OOl OOl OOl OOl Or1� OOl �b�o 0�' OOl _�_ O- ----------- �� IP --- b�� SF \ _____ � - - SF - o o - -N --- --------- - x -_— x X X ilr x 485 485 ___ 487 TS 489 ego 1 `\ 1 1 TEM ARY CONSTRUCT/ON o a S x p \\ ' \1 ' ENT I I \ �_ l" ------------- 1 \ \ , - '�'------------------------: — \ I - - __ -- - ------------- --------------------------- -- ----- -- _________________________� M = _--______________ - E TRA/L - L/. RTE: �'J --o/ - --_;_;-- --- --_ ------- -- -------- ------ -- - ----v------Q---- ---" -7 —OOl001�O _--- -- IF, 90170M=47379 - --_ �w SF —X - - T- X X -__ ' -. _ -X - -,CIP /__________ ___________. ________ --------- - - - - - - - - - ------------------___------- 626.66' (R8M) SF ' 1 � HATCH LEGEND IMANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL 3.01 SAFETY FENCE SAF TEMPORARYSTONE CONSTRUCTION ENTRA• E SILT FENCE SF X X 3.07STORM DRAIN INLET PROTECTION IP 3.08 CULVERT INLET PROTECTION CIP 3.18 OUTLET PROTECTION OP 3.31 TEMPORARY SEEDING TS TS R PERMANENT SEEDING PS PS R TREE AND PROTECTION ION TP TP R DUST CONTROL DC pC W W rU) V �LU z Ir W W Z W U F S u z Wlgw w -U U g U o W U - z u w U _ > W I_ w Z C'J U - o' F W z 2 w W C �>ZUwc/5C r=n��a<Z< Z 0W Z F H 0zD< < c < 0 c/) 0_ CO Z) W L rz�a< o - > O U W H REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS I Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OBP - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLER// 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com ,4 kmv e.. RTAN YAIJUER Lic. No. 0402056625 6, 07/01/2022 j SHEET TITLE: EROSION AND SEDIMENT CONTROL PHASE PLAN IB SHEET NUMBER C-609 30 15 7.5 0 30 1 "= 30' REVISION 2 - 07/01/22 0 Fc xgPHASE 11 SEQUENCE OF CONSTRUCTION \ 1. CONTRACTOR TO INSTALL REMAINING UTILITIES ON SITE INCLUDING PROPOSED WATERLINE, SANITARY MAIN, ANDIP 3 STORM SEWER. U 8� 2. CONTRACTOR TO INSTALL STORM INLET PROTECTION IMMEDIATELY AFTER PROPOSED STORM INLETS ARE INSTALLED. 3. CONTRACTOR TO BEGIN CONSTRUCTION OF THE PROPOSED BUILDINGS. U.] ` `` `` `. ``. \ `\ i / = .-" 4. CONTRACTOR TO CONSTRUCT THE REMAINING CURB AND GUTTER FOR THE PARKING AREAS. Z_ W U �\ ,'', 5. CONTRACTOR TO INSTALL THE PROPOSED ISOLATOR ROW. C7 Z Z) Z to U `A` \� __ �� /',,','�' \ \/ \ V\ 6. CONTRACTOR TO BASE PAVE THE PARKING AREAS. W W U $ ' 7. CONTRACTOR TO BEGIN INSTALLATION OF ADS SYSTEM 2. Z r U H W � W � Z § 7.1. STORMTECH MC-7200 CHAMBERS SHALL NOT BE INSTALLED UNTIL THE MANUFACTURER'S REPRESENTATIVE HAS COMPLETED A PRE -CONSTRUCTION MEETING WITH THE INSTALLERS OR PRIOR TO UPSLOPE STABILIZATION. J i Z U W Q w 7.2. STORMTECH MC-7200 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-7200 Ix of Q CD C') I- w ao XTM CONSTRUCTION GUIDE" Z U) W Z H H `w �i�� _ - i i ' 7.3. CHAMBERS ARE NOT TO BE BACKFILLED WITH A DOZER OR EXCAVATOR SITUATED OVER THE CHAMBERS O d Q H mej - r _ 'f ✓� V O \ \\` \ ,\ � ��`�`. '.`\ \\� i U Q � U O pro STORMTECH RECOMMENDS 3 BACKFILL METHODS' o ---- ' i ' -- / \ \ t� \ - \ 7.3.1. STONESHOOTER LOCATED OFF THE CHAMBER BED. Z J 0 W <& 7.3.2- BACKFILL AS ROWS E BUILT USING AN CAVATO ON THE FOUNDATION STONE OR \ `\\ `` \ ` ` \ 7.3.3. BACKFILL FROM OUTSIDE THE EXCAVATION USING ALONG BOOM HOE OR EXCAVATORS J d J ELo /,/, -----------------. � O H-10 \ � `� \ �� ;`�` `� \�� __- _1 � �_,, /,.= 7.4. THE FOUNDATION STONE SHALL BE LEVELED AND COMPACTED PRIOR TO PLACING CHAMBERS.0 =o _________ �.�..__ __ ING STONE. ----- � �,;;�/ / 7 % �'; �%' � / - _ _I ,� � � _ _ _ ```, `�- 7 5 JOINTS BETWEEN CHAMBERS SHALL BE PROPERLY SEATED PRIOR TO PLAC H 5 & G / --- ---- - , s,%' - - 7.6. MAINTAIN MINIMUM - 9" (230 MM) SPACING BETWEEN THE CHAMBER ROWS. _ _ _ _ _ _ _ / O� �.';, ,,. _-�`;;`_ _ _ �\;4 \ /'/'-__- �`�;�" - 7.7. INLET AND OUTLET MANIFOLDS MUST BE INSERTED A MINIMUM OF 12" (300 MM) INTO CHAMBER END CAPS. U ____ -___ 'rI �' / ^ -� ` ` `, .- 7.8. EMBEDMENT STONE SURROUNDING CHAMBERS MUST BE A CLEAN, CRUSHED, ANGULAR STONE MEETING THE -.6 -A o �� -� \; ' s5 1. ,v AASHTO M43 DESIGNATION OF #3 OR #4 _- ---- _-------------------- 2� \ G _ _ _ _„ _ 7.9. STONE SHALL BE BROUGHT UP EVENLY AROUND CHAMBERS SO AS NOT TO DISTORT THE CHAMBER SHAPE. STONE --- --__ _-_ �� `J��^' �\ `STM \\ `�,\`; \` \\_' i DEPTHS SHOULD NEVER DIFFER BY MORE THAN 12" (300 MM) BETWEEN ADJACENT CHAMBER ROWS =a 7.10. STONE MUST BE PLACED ON THE TOP CENTER OF THE CHAMBER TO ANCHOR THE CHAMBERS IN PLACE AND _, _ PRESERVE ROW SPACING ------ - ------ _______ ----- --- G`p� - Ap qag - \\�\ `�\\ ` e�, `` 7.11. THE CONTRACTOR MUST REPORT ANY DISCREPANCIES WITH CHAMBER FOUNDATION MATERIAL BEARING _ - --_ - _ _ -__ STM - , � 3 � 6 - , A-90 P I r \ THEUSEOF 'FLEXSTORM CATCH IT' INSERTS DURING CONSTRUCTION FOR ALL INLETS TO SITERUNOFF. \ j?y7(✓D$�`.(lr �: ; `,' . CAPACITIES TO THE SITE REV , ADS RECOMMENDS TH E SUBSURFACE STORMWATER MANAGEMENT SYSTEM FROM CONSTRUCTION SITDnAwx er _--- - PROTECT THE REV DATE COMMENT O r 78`�G-3B - - --'- _ � I - ,- '' - ' � ' ' '� ! SEE SHEET C-908 AND C-909 FOR MORE INFORMATION REGARDING THE ADS STORMTECH SYSTEMS. cxECKEo BY - _ - - - - / 4 / , I C=0.85 w � �? OWpl" - 2O-Gj f} 1 ' ' _ _-- _ _ ___-_ 00'\ - " I % _ STM / C=0.85 `o` o \ '. `a f7��\rRES)DFi LJi I /' ; r 8. CONTRACTOR TO INSTALL ALL PROPOSED SIDEWALKS. 1 05/18/22 COUNTY COMMENTS RTM ; � _ _ --"- - ( / so 0d�;E'Ab1J6Y RESNT/4L'\ \ 9. CONTRACTOR TO PERMANENTLY SEED ALL DISTURBED AREAS AS SOON AS FINAL GRADE IS MET. PCM - ----- -- `�� ,-' ` `\ - " ` ` G S C 2 07/01/22 COUNTY COMMENETS ��`� / . �� - - --------- --- ------ - --- C1 / k9h STM ;===i i' �` �, `` `, ` �` I" ` ` `, � �``� �`. 10. CONTRACTOR SHALL KEEP ST-1, ST-2, ST-3A, ST-4, AND SB-1 OPERATIN UNTIL ITE IMMEDIATELY ADJA ENT AND RTy O - / pA / \` `\:,`\ - --- ------ -_� - --__ -" p6ti _ -c_ A - _ AO �- ,` `� ,�\;`�; 'I \ , UPHILL OF THE SEDIMENT TRAPS IS PERMANENTLY STABILIZED. - ` \ _ - _ - _ / Q -'i \ ,� \ \ , , , \ \``, ;,;`,\; 1 11. CONTRACTOR TO BUILD WALLS AND SIX (6) TOWNHOMES IN THE SOUTHEAST CORNER OF THE SITE ONCE VAULT 1 - _ - - - ----- IS FULLY OPERATING AND SITE IMMEDIATELY ADJACENT AND UPHILL IS PERMANENTLY STABILIZED. C - -- 00� Cph'L <�gyj _ ___ - ._ v ; �\ `, �, �, , , ` ; I II I I ( \ ', \ `, \ ', NOTE: THE COUNTY E&S INSPECTOR SHALL APPROVE PREVIOUS PHASE PRIOR TO THE NEXT PHASE COMMENCING. 0.75 = G0.88 I ________ _ \ _ / � 00� ST �"✓ "00 < 1�. C O.aO , �� I. � �� , 4 465 "� i�I h, v` `\ - _____ \ `\ ✓ / d. , 11 - ` `� � � CC-1 y C `'S A-70v,, v -62.1 STM \ , v v \ A-71 I ^ �2 c oho A-71 / '� , • ,, v v - Know what's below. �� .1\\„\ ` - / -._ - call before you dig. p - A� < _ ------ HATCH LEGEND A�-F= ;, - --- ALWAYS CALL 811 ------------ 0,- Ifs fast. Ifs free. It's the law. s -- /' NL7Sr N'F, �\ - \''.. -.$$Q-23 � MANAGED SLOPES -__ _= 4- ho a/ "\✓i S< aab° NOT APPROVED FOR i'�/_ ® PRESERVED SLOPES � 5L / , ' : 4 A-62 A-61 � ao.90 ,` , / • I y� \ " �y� T;l%D, �PLA U ED% L N/T _-- CONSTRUCTION '1 PRESERVEDSLOPERCENVERIFIED USE ✓ CAMI, ,, \ \ c� _ ---- C�.85 `\ - \ \ <25%PER SLOPE PERCENTAGE EXHIBIT THIS DRAWING IS INTENDED FOR MUNIDED AS ACONSTRUAGENCYI \I ` __ a°' A°�ti - C�.65 /I I A-61 �' � ` \` � REVIEW AND APPROVAL. IT IS NOT INTENDED ASACONSTRUCTION - - --/.'- ' _ \ `,\ \ DOCUMENT UNLESS INDICATED OTHERWISE. \ \ `, PROJECT No.: V192076 A-50 - _ ,, `,,\ `�� _ �`\ \ DRAWN BY: MEG / PM , ., Y % / %' =4 /�' sTM`' VIR A UNIFORM CODING SYSTEM CHECKED BY: RTY cZ. �` `` ` / _ _ \ \` _ _ A - ' / ` - _ _ \ , ` ,' I„ I \' ,, .' VIRGINIA DATE: 1017/2021 G , ,'„ ' A-64.1 -so c=oss \ ' o , \ \, , ' ' ` FOR EROSION AND SEDIMENT CONTROL PRACTICES CAD LD.: OBP- 0 ,� ` STM \ 'i '�\`��, L I `_ PROJECT: A-63 TITLE KEY SYMBOL A- 0 `\ VIRGINIA -ass A-22 J/� cos° A 51 STORMWATER 6' , c - c=oso \ 3.0, SAFETY FENCE SAF MANAGEMENT PLAN A-64 c=oso \ ' I ❑ O FOR 0.88. , -00 ' ' /'- i ', '� \ `\ `\ \` - TEMPORARY STONE i i i" `� '� \ `` i - - \ 1 3.02 CONSTRUCTION ENTRANCE A-41 sTM - `- \ ` CE CE RST RESIDENCES TA \`------ SILT FENCE O - C-065 4 C�.Bo f STM -- SF PROPOSED LOCATION: C-41 G- N 485 0.911 A-20 ' A-21 I ' ' v o ( A-33 - �' LANDS /1 SEMINOLE TRAIL �' ` `\ d\ O r - q8J Ash - ' ', ' ', ' `,� , � `\ ,1;� � c=oso � � � 4sa PA7UL'ES BREEDEN BR/CKHEAD AND STORM DRAIN AND ASHWOOD BLVD. \` \ `, IP` \ \ 0 STM $TM , 4 4B) C=0.85 _ - D 3.07 IP ``, `, ;'ii� ' ! /;' �' S /L-LARD HOWARD BR/CKHEA ❑ INLET PROTECTION CHARLOTTESVILLE, VA 22911 TRUST, ET AL ALBEMARLE COUNTY, VA J STM 9 / / ' � ' A I C 41 , In `I7illl`v� , r0 -��' $TM A 481 �3 i I I , , JI y II \ \ \ \ , .... 4b1 q p , 478 i I I `,'\' 'I'll' I ` \" I �• / II III .o _: '+ / - -- _ 88 '.• \' I ' ', \ D-21-40 ---- _- _ - j; ,- i_. ' EX-F1 D-10 C=0.80 c�.eo 41a c=os5 4� --------'- / i i ' / - - - _ _ i ----------------- r - , _ _ F20 STM $T 3 1 , S Sr 6-0Ot-,,'\�\Ft -3 STM I I TM I / - 4 / 473 ' 475 480 477 i' 474 . . X-F I 0 _5_--OO�i 475 480• \ , ' `\ 470 `.. , 'i 5, 490 4a0 480 - 5 EX-F2 � I I - -D f1.�A6fOlEL '�+s.' I , 1 / DB.'y46%leG 558 bPMENTv / --- S'NGlf"FAM{Li `/?ES/DENTLALI // 1 _ -USE.•-- i GV4 128 PG 719 TIP. 07,-00-00-029X SON/NG R1 (RES/DENT/AL) USE.• /NGLE FAM/L Y RESIDENT/AL I I I I l h - I it it Y �I ii q B-30 + V S a I �II I I^I C�.85 C=0.88 /I C=0.88 h I� IIII I AREA CA' ✓-TEA WY O \PHASE Qa - y ` Cp.•,/(%fl.(PL,�{iY�N�:t//y/iE�OPMENT� 7/SE; S/LL/LYf Fb1l'4E�(DDiVT/AL LOT 18 BLOCKI✓-TEAKWOOD I F(WF.S7 /AKF.S .S LOT 17 BLOCK . i-TEAKWOOD PHASE 2 F LAKES SOUTH D. 42 PG -781 / ZONING.• PUD (10ZAII UNIT DEVELOPMENT PHAS 2 USE• S/NGLE FAM/L Y RESI%�ENT/AL OUTH� / H CULVERT INLET PROTECTION CAP BOHLER// 3.18 OUTLET PROTECTION OP ' 3.31 TEMPORARY SEEDING TJ TS O 3.32 PERMANENT SEEDING PS PS 3.38 TREE AND PRO ECTIONION TP TP E DUST CONTROL 60 30 15 0 60 1 "= 60' 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com TH pF` V N YA R y .p Lic. No. 0402056625 ��A 07/01/2022 & � �oNAL SHEET TITLE: OVERALL EROSION AND SEDIMENT :ONTROL PHASE 11 SHEET NUMBER: C-610 REVISION 2 - 07/01/22 Q. N I N , N s1 i , stoPE`EasEMENr ' P.8 PC 00 SEE SHEET V �`�\ ----- ` .�Lb ------------- -TP -0 0 1, 1 \ SF 00 / V 01 i 5N)O ' / --� TEMPORARYCvNSTRUCl/ON \ -_� � 1�---.\ `�� \\ __ _--_- 1 I�11 / N `A> IRAN1 EASEMENT _ . \\; 1 ____ �V/ \ I �'"1\ 4699 PG 43 - — „ i' ' S ' j-- --- - a _ lZ 1 - d0 �0 10 A-90 N�. Ps \\ ; \ , \, ,, \ 400 ;d.•. \ Ph�OR �N S�LJENF �%r' ! C=0.85 ''�' �'/''' � -- // ' i i I I i - 1� "_ '- `\/ ', o � �7(Y✓LVN-VV �V6`U/1J 40") SF \ C=0.85 ,j,,4A#Z � sIQEiW O - / \-_ - -- - /� - b0 ' PS \ -------------------- J n - - TP C=0.75 X t,� � 0S51EUt 9007,1 1 � � EQ� 0) ��Q`G PR EP Fs - - - DC ------------- I ' a - _ _-_- _ _ -- __ _ - --" - " ----- �- - _ J ---------- I, ------- PEDESTRIAN .�� CEMETERY [MATCHLINE - SHEET C-612 0 A 71 C=0.80 Y9 / - A-63.1 - 5 -'" C=0.65 ' Z 7 C=0.88 LINE - SHEET HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL 3.01 SAFETY FENCE SAF CONSTRUCTION ,_, ,�•�; E SILT FENCE SF X X 3.07STORM DRAIN INLET PROTECTION IP 3.08 CULVERT INLET PROTECTION CIP OUTLET PROTECTION OP TEMPORARY SEEDING TS TS 3.32 PERMANENT SEEDINGTREE PS PS AND PRO ECTIONION TP TP DUST CONTROL DC pC 30 15 7.5 0 30 1 "= 30' F V Z a W W W U z F � u Wz Wu,gws �zWwW ju ~wax w- > Z W C/) r53 'In Z < zz WzFF 0za<Q c J �CO Z D_ < 0 Z) z W, Q ��a o J o O U w H REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OBP - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com ww _ TH pF` c� Z V N YA R y .p Lic. No. 0402056625 � BOA 07/01/202��1�� s's'�oNA►. SHEET TITLE: EROSION AND SEDIMENT CONTROL PLAN PHASE 11 SHEET NUMBER: C-611 REVISION 2 - 07/01/22 -,MATCHLINE -SHEET ------------ i 1 1 / \ ------------ 1 / - i , LANDS\ COMMONGYEALT RG/AHA TP � _ -- _ L 0.9 2063' 65 _ - " - - - TMP.• 0466?5 0 . 00 -- - ----- _ -- -- - -- - - 0 >D4 _ \ PUO' (PLANNED l�N D NT _' '' — _ - --- - 4an;- — r USE.'\ l7 '__ -— ----_---------- - --- Cam' 0B2 0UF GRAD _ Iev ' I $ { _ _ IP / $ AD _20 C21 \ �G _ j C=0.65 _ �� - C41 / -- r 00 1\ .77 AC; C=0.60 \ __ ___ TERIAL$ ` 1 ' ii in v �` �` - - `I �t ' ' TORAGE I IP $TM , ` n\ \ ` _ _ __ O „i , QI i `� R C-20 C-2 �/ I A`,\ I I PS Ps IF SF SOAPS, DETERGENTS, SOLVEN / AND WASTE WATER OF / ON TR CTI NAREA AMENITIES ^> " ----- -_- IF IF C-41 o v 0 VEHIOLE Fl1ELIN AREA I I \ \ \ 1 \' '� 1 SF c ONTAINMENT STM II, T / 111lln hl `, A AAAA �,�-- --_�IIIIII STM CE C-00 STAGING AREA RAIN GAUGE. $ PORTABLE TOILETS IJ-r\� 1 p I II qj 0 \;\`\\`, CONCRETEWASHOUT `I III s v vV1 �, G p9A _ AREAI 1`\\`\ o�, � I I of III I IIII I 1 C=0.88 Wj - ' _ "_-''-_ -'-'' _ _--'''/ / _ _--' -,•-' / / / i i I -' i ; i�\ \ `, 11 `, �\ \ `\ \ \ \ r I o I II III i li � q)q TP li li li I C 40 SF II II II II!' a1'l'i EX F1 I I 1 - I '' '1\ C=0.83 I i ii it I �' \ 1, i ,- - SF , r / g�' i---- UJ A C 0.75 C 0 35 TP I \ / r 't� /l\ 11 I - �' --- L\ ------ ------ - ----- - /%;' %% �'�V F20 , �:_ __ STM ----------------- ---------- IF ---- - _ / _ ; • Ili V (A �, IF - / /� 1 I p STM p �R/M-46562 i �I F_20 470 1 SEE INSET�HIS HEET i� IP� - /' j T1 475 ' , , I SEE INSET , THIS SHEET , , " I X-F -------------- SF ytN — S i EDESTRIAN 501 CONNECTION TO CEMETERY 00 4P5 a�\p96 \ _ 49� A-64.1 --- - 1,11 Z 1 111 II'II111 L•JL �' / EX-F2 II -- � , --- TP SF x C=0.50 N \ / 489 < 1p\ EX 20 SDW ESMT EX. 9" SANITARY /, PROX LOCAT/ON PER AS-BU/LT ' ( 487 - A 64 PRONDED BC' ABUSH, CALE & ASSOC, INC ` TILED- ASHLAN 6YNHOUSES AS BU/LT HATER INE AND SAN/TARP SEIYER" DATED 10/28 94 REY/SED 01/09/1995 C=0.88 NEVIN -�C �'rrD. all - P - D-3 -- C=0.80 I I U W W 2 W Z 2 U Q HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT AS-11 1W = 472.50 IN = 46381 OUT = 46971 EX A5-10 M/ R/Af = 46709 VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL E SAFETY FENCE SAF 3.02 CONSTRUCTIONONE ENTRANCE 3.05 SILT FENCESTORM DRAIN SF X X 3.07 INLET PROTECTION 3.08 CULVERT INLET PROTECTION Clr 3.18 OUTLET PROTECTION Or 3.31 TEMPORARY SEEDING TS TS 3.32 PERMANENT SEEDING PS PS z EE W w w o z F � u Wz Wlgw Cw7zWw� ju zrCDt=po 0 ~wax w� L_j>zUwv)C meja Q z < zcnMWzFH �za<Q —!z' z J mc � D _ coUoDof Q �z�a< a J o O U w H REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OBP - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com ww _ TH pF` c� Z V N YA R y .p Lic. No. 0402056625 li 3.38 TREE PRESERVATION AND PROTECTION ��ONAL� TS� 3.39 DUST CONTROL DC pC SHEET TITLE: EROSION AND ' SEDIMENT CONTROL 185 PHASE PLAN 11 30 15 7.5 0 30 1 "= 30' SHEET NUMBER: C-612 REVISION 2 - 07/01/22 tmi MATCH PS '" - ------ A-6 F- , 11500 I A-62 I TP \ � ` SF ' _ k 4 """ p9ti -- - --- C=0.65 C=0.85 /__ � PS - ','""'��'� 487 I A-61 - PS --'496 489 $TM A-64.1/ STM 490 C=0.75 A-63 --- LINE, — SHEET C-611,y-�,� a _ `I - 1 C=0.90 1, � *� n 0.07 AC 1'1 0.16 AC i lil - iTAWN r 'ram Si.'i: I I J •W•sr• .•�•♦qrN♦yqr♦♦•VPOr• •♦j�NQ�Qj♦rNi••w♦ii ihiipQ ,NA♦♦iN��I NN•iw••q♦qN�N �♦i Aw♦•NA� oNAO•NA♦ •Nws� I ♦ rN♦♦• p ♦ qo♦VN♦ • ♦ iN•i♦r••O • iN•i♦VN•♦♦•WN♦♦i V!♦ - ON OiNNNiP ♦VNO�.♦•Nrt , ♦♦rr• •rV' iN♦N�N• I ♦QV•♦'•i�� rN♦Nq•♦♦rNrNw♦w♦, •NA♦♦•N�•♦ •o♦♦rNgw�.�N ' A♦♦rNr•♦. � ♦�A♦♦iV ♦♦•NA♦♦iV Ii ••i♦ijN I . \ A♦♦,NAB ' A�♦ •q♦�,NA♦ o �' 1 �♦ii •ArN��i�r \ VNi `�Q�,..N.♦♦NrN. ..y ,�pF, ,••w•••N.�♦NNE' tp ,q�♦s, II ' �, . . iN•i♦NrN•i• riN.iN•i♦i• �7,/ , Fii•i yA•i♦ii i 1•N•i♦rNA♦•i ®• '� N•gr�j�•�•�O�Ni••i♦•.00 0 �NIiN.N �....�.•.--i��•qi-ay.♦♦rN�NIvN9�♦ ,�iNA•♦♦•Niriii♦•0 8•ii:NA•�� N°iwi •N•wwrNi'M.♦•N•\ ♦rN♦N, 1 • , �� 1 N�µ,Y��t��'♦iNi q•Iyi•�Nli�•ei♦iNY�N♦♦i iN A•i%fiDciewiryjNrm jN��{•y�s�yNiQ�� 'i gc 1 • 1 0.1� ti m ' 1 /I -- , D-30 u , 1.19 AC 1 1 / , C=0.80 C=0.65 1 ' 1 I T PS , 1 1 I I I 1 I I ✓ \ I \ D-30 i i 'i ' , i I, I , � `k � ' `I � S. \ 1 (n � I I I 1 .I •�" 1 � to ,•t I I - A, �• IP B-40 J. a ` lye • v 480 482 -5F ` \ \ 470 , " -- 485 , I 1 - S65°54'00"W 1025 9T (R) I \ 0 _ p6$ \\ k - Ps AHATCH END C=0.90 --- - _------- A- 20 MANAGED SLOPES ------------- � -%' , � — // �' ' ® PRESERVED SLOPES 48q 0. _ -- PRESERVED SLOPE FIELD -VERIFIED C=0.85 �' /<25%PER SLOPE PERCENTAGE EXHIBIT I I l l LANQ.� N/F VIRGINIA UNIFORM CODING SYSTEM ae2 ` , Sao srM � ;' �; -20 --- - FRANCE.S BREEDE/V`RR/CIfHEAO ANL� j jl PS P$ -- W/LLARQ-A0HA1 RO '5�/0fHEAD FOR EROSION AND SEDIMENT CONTROL PRACTICES FAMILY TkuST, L-7 AL W.B. 126'IPG 719 ! NO. TITLE KEY SYMBOL \ \ — iaO..• 04600—dQ-00—�928,14 w \ w PS ZONING. R1 (I ESIDE/YT/ALA; U TP SING/ Z FAM14Y RE4IDEN{rIAL -10 '` I ' i i 3.01 SAFETY FENCE SAF SF TM ::3.02 TEMPORARY STONE 1I I I I 1 CONSTRUCTION ENTRANCE �! DC IIIII I1 I1 '1 1 '. \\-� ``` _ - II II II II II II I II 11 I ;i i '1 ', I '1 '', [: 3.05 SILT FENCE SF X X , 1 ` 1 II II 11 II II I II II - N N k , 11 11 11 11 11 II II W W co ', 1, II II 11 11 II 11 11 11 `�� I Q (;1 O , '1 STORM DRAIN In 1 II II 11 11 II II I II o 1 �, I 3.07 r 1 II II II II II II II I N N ', 1 ❑ INLET PROTECTION 1 11 Ij 1 1j Ij 1 I II 11 �` , 1 ' B 30 1 I , I I 1 �1 B 20 1 1 I fr m O 1j B-1 0 II Ij 11 1 ', I '', 3.08 CULVERT INLET PROTECTION CIP 1 Ij II 1111 �I II Ij �� I I I 1.09 AG I I I I 0.38 AC C=0.85Ub AU P$ n C-0.88 I II 3.18 OUTLET PROTECTION Or C=0.88 , I ` I I II II II II 11 II 11 ', ' ` 1 1 II II II II II 11 11 11 � I I I ` 1 11 II II 11 II II II 11 ; T TEMPORARY SEEDING S TS 1 1` �'k 1 1j 11 1j 11 II 11 II I / ` � 1 11 II 11 11 II 11 II II`a � k i ' I \ 1 II II II II 11 II II 11 \ ', O PERMANENT SEEDING 1 II II II 11 II I� 1� /1 Q � I I � I 11 II II II 11 I e I ,` � ` i• �� 1 11 II II 11 II 11 e � ` Yj6, \ II II II 11 II 11 i k � a 1 Ij II 11 11 II 11 �. 3.38 TREE PRESERVATION 11 II II 11 II 11 I AND PROTECTION -- _ -� "o I I II II II II II 11 s - - _ 11 II 11 II II II DUST CONTROL O pC DC STM 11 II II 11 II II\ — I II II II II It 11 , B-20 1 IP 1 II II \ 75 RD DUMPSTER 4 J 5 45 I' IRO P/PE FOUNO�� ' J _ SF 0.5-A 00E RAGE m O \ \ TP �' 30 15 7.5 0 30 k �W z W W W 0 z F D Wz W��w CW7rzWwC�� Wju o z� ~ W Q 2 W �>zUWcaC U) 7 m Q Q Z< Z (n� W ZFH �zQQQ~C Z J rn 0 Q �zc�D_< 0 J 0 O U W I- REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OBP - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com ww TH pF` c� Z V N YA R y •0 Lic. No. 0402056625 � BOA 07/01/2022��1�� N TONAL SHEET TITLE: EROSION AND SEDIMENT CONTROL PHASE PLAN ►► SHEET NUMBER: C-613 REVISION 2 - 07/01/22 N l l NII \ \ \ 1 1 1 I I --------------------------- - 1 1 \ \ \\ \\ \`\ \ L� \ sin , - - ---- 'i - - - - —EURB LET ` -_--- -_- ----- - _- - ----------_--------_-_---_-_____-_-____-_______-_-___-_____-____________==-__r_ ---_---___ - \ -- /IIIIj I �J p UAR/4BLE W/OTH R/GHT-OF-6YAY- \ `------_ - --- ___ __________ ___ ___ ____________________ _ „\ `� - \ \ _— _ - -- - srtf __ymtE3_- �__- -__ ---- --_-- - --- - A=469.ZBi ASPHALTPAI/EOPURL/CFOAOINAY \-- _ - - _-- _—_------_---- -J ---- _3L12Zr_�_ I - ------ -- /V94692J; -- 11 11 - \� -- - ---- IP ;l-414-T? ___.__ —_— _ ----_ , --- _ —= =__ _____ �- ____ � —� ----_ - - - - HATCH LEGEND MANAGED SLOPES ® PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT _______________: I, -_ \ ----- ------------- -- \" _ _ — I `\LLI W1 1 _ - I 1 --- -------------------_ --------- - --------- -_ ____________-�-— _--`------- -"/L - U. S-29 " 4/L - U.S. RTE. 5 VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL 3.01 SAFETY FENCE SAF ®TEMPORARYSTONE CONSTRUCTION ENTRANC]EM • • • • • E SILT FENCE SF X X 3.07 STORM DRAIN INLET PROTECTION IP 3.08 CULVERT INLET PROTECTION CIP R OUTLET PROTECTION OP R TEMPORARY SEEDING TS TS R PERMANENT SEEDING PS PS R AND PROTECTION TREE ION TP TP R DUST CONTROL DC pC W W r2 V W t, z EE W W W (n Z_ F W W U C7 Z� Z W H 2 W OKWw2jw w zrCD—oaU FWax WZ Hof Ix-j r=n a Q z Q zJ) WzFI- zzaaQ~O Q J DOf � W Z Z aQ aQ of J 1-- 0 W H to REVISIONS REV I DATE I COMMENT 1 105/18/22 1 COUNTY COMMENTS I 2 107/01/22 1 COUNTY COMMENETS I 15 Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD LID.: OBP - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com TH RTAN YAUUER Lic. No. 0402056625 07/01 /2022 SHEET TITLE: EROSION AND SEDIMENT CONTROL PHASE PLAN ►► SHEET NUMBER: C-614 30 15 7.5 0 30 1 "= 30' REVISION 2 - 07/01/22 W n EROSION CONTROL MINIMUM STANDARDS MS-1: PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN (7) DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE (1) YEAR. ACTION: SEE EROSION AND SEDIMENT CONTROL NARRATIVE SECTION X. PERMANENT STABILIZATION. MS-2: DURING CONSTRUCTION OF THE PROJECT SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. ACTION: STOCKPILES SHALL COMPLY WITH MS-2 BY PROVIDING SILT FENCING AROUND THE BASE OF THE STOCKPILE. TEMPORARY SOIL STABILIZATION MEASURES NOTED IN MS-1 ABOVE SHALL COMPLY. MS-3: A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT IS UNIFORM MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. ACTION: SEE EROSION AND SEDIMENT CONTROL NARRATIVE, SECTION X. PERMANENT STABILIZATION. MS-4: SEDIMENT BASINS AND TRAPS PERIMETER DIKES SEDIMENT BARRIERS AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND -DISTURBING ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. ACTION: SEE EROSION AND SEDIMENT CONTROL NARRATIVE, SECTION Vlll. SEQUENCE OF CONSTRUCTION, PHASE 1. MS-5: STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. ACTION: EARTHEN STRUCTURES SHALL BE STABILIZED USING TEMPORARY SOIL STABILIZATION MEASURES AS NOTED IN MS-1 ABOVE SHALL APPLY. MS-6: SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN. a. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA AND THE TRAP SHALL ONLY CONTROL DRAINAGE AREAS LESS THAN THREE ACRES. b. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER THAN OR EQUAL TO THREE ACRES SHALL BE CONTROLLED BY A SEDIMENT BASIN. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA. THE OUTFALL SYSTEM SHALL, AT A MINIMUM, MAINTAIN THE STRUCTURAL INTEGRITY OF THE BASIN DURING A TWENTY-FIVE YEAR STORM OF 24-HOUR DURATION. RUNOFF COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TO A BARE EARTH CONDITION OR THOSE CONDITIONS EXPECTED TO EXIST WHILE THE SEDIMENT BASIN IS UTILIZED. ACTION: THE BASINS AND TRAPS HAVE BEEN DESIGNED TO ACCOUNT FOR THE ENTIRE DRAINAGE AREA CONTRIBUTING TO THEM. THE APPROPRIATE SIZING AND STORM CRITERIA HAVE BEEN USED IN THE DESIGNS. MS-7: CUT AND FILL SLOPES SHALL BE ASSIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE (1) YEAR OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. ACTION: THE CONTRACTOR SHALL STABILIZE THE ULTIMATE CUT AND FILL SLOPES AS FINAL GRADES ARE REACHED. MS-8: CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE. ACTION: CONCENTRATED RUNOFF WILL BE CONTAINED WITH AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL. MS-9: WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED. ACTION: ADEQUATE DRAINAGE AND PROTECTION WILL BE PROVIDED. MS-10: ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT -LADEN WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT. ACTION: ALL STORM SEWER INLETS WILL BE PROTECTED DURING CONSTRUCTION. MS-11: BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE CHANNELS OR PIPES ARE MADE OPERATIONAL, ADEQUATE OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL. ACTION: ACKNOWLEDGED. MS-12: WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST EXTENT POSSIBLE DURING CONSTRUCTION. NON -ERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THESE STRUCTURES IF ARMORED BY NON -ERODIBLE COVER MATERIALS. ACTION: NOT APPLICABLE. MS-13: WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY SIX (6) MONTH PERIOD, A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF NON -ERODIBLE MATERIALS SHALL BE PROVIDED. ACTION: NOT APPLICABLE. MS-14: ALL APPLICABLE FEDERAL, STATE, AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE MET. ACTION: NOT APPLICABLE. MS-15: THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETED. ACTION: NOT APPLICABLE. MS-16: UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION TO OTHER APPLICABLE CRITERIA: a. NO MORE THAN 500 LINEAR FEET OF TRENCH SHALL BE OPENED AT ONE TIME. b. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. c. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OFFSITE PROPERTY. d. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE STABILIZATION. e. RE -STABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS. f. APPLICABLE SAFETY REGULATIONS SHALL BE COMPLIED WITH. ACTION: INSTALLATION OF UNDERGROUND UTILITY LINES SHALL COMPLY WITH MS-16. MS-17: WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND -DISTURBING ACTIVITIES. ACTION: A CONSTRUCTION ENTRANCE WITH WASHRACK HAS BEEN PROVIDED. MS-18: ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. ACTION: SEE EROSION AND SEDIMENT CONTROL NARRATIVE, SECTION Vlll. SEQUENCE OF CONSTRUCTION, PHASE It. MS-19: PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION IN ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA: a. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR MAN-MADE RECEIVING CHANNEL, PIPE OR STORM SEWER SYSTEM. FOR THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE SYSTEM SHALL BE PERFORMED. b. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN THE FOLLOWING MANNER: (1) THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL DRAINAGE AREA TO THE POINT OF ANALYSIS WITHIN THE CHANNEL IS ONE HUNDRED TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA OF THE PROJECT IN QUESTION; OR (2) (a) NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A TWO (2) YEAR STORM TO VERIFY THAT STORMWATER WILL NOT OVERTOP CHANNEL BANKS NOR CAUSE EROSION OF CHANNEL BED OR BANKS; AND (b) ALL PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS SHALL BE ANALYZED BY THE USE OF A TEN (I 0) YEAR STORM TO VERIFY THAT STORMWATER WILL NOT OVERTOP ITS BANKS BY THE USE OF A TWO (2) YEAR STORM TO DEMONSTRATE THAT STORMWATER WILL NOT CAUSE EROSION OF CHANNEL BED OR BANKS; AND (c) PIPES AND STORM SEWER SYSTEMS SHALL BE ANALYZED BY THE USE OF A TEN (10) YEAR STORM TO VERIFY THAT STORMWATER WILL BE CONTAINED WITHIN THE PIPE OR SYSTEM. c.IF EXISTING NATURAL RECEIVING CHANNELS OR PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS OR PIPES ARE NOT ADEQUATE, THE APPLICANT SHALL: (1) IMPROVE THE CHANNEL TO A CONDITION WHERE A TEN (10) YEAR STORM WILL NOT OVERTOP THE BANKS AND A TWO (2) YEAR STORM WILL NOT CAUSE EROSION TO THE CHANNEL BED OR BANKS; OR (2) IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE TEN (10) YEAR STORM IS CONTAINED WITHIN THE APPURTENANCES;OR 3 DEVELOP A SITE DESIGN THAT WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A TWO 2 YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A NATURAL CHANNEL OR WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A TEN (1 0) YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A MAN-MADE CHANNEL; OR (4) PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT, STORMWATER DETENTION OR OTHER MEASURE WHICH IS SATISFACTORY TO THE PLAN -APPROVING AUTHORITY TO PREVENT DOWNSTREAM EROSION. d. THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO MAKE THE IMPROVEMENTS. e. ALL HYDROLOGIC ANALYSES SHALL BE CASED ON THE EXISTING WATERSHED CHARACTERISTICS AND THE ULTIMATE DEVELOPMENT OF THE SUBJECT PROJECT. f. IF THE APPLICANT CHOOSES AN OPTION THAT INCLUDES STORMWATER DETENTION HE SHALL OBTAIN APPROVAL FROM THE LOCALITY OF A PLAN FOR MAINTENANCE OF THE DETENTION FACILITIES. THE PLAN SHALL SET FORTH THE MAINTENANCE REQUIREMENTS OF THE FACILITY AND THE PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE. g. OUTFALL FROM A DETENTION FACILITY SHALL BE DISCHARGED TO A RECEIVING CHANNEL, AND ENERGY DISSIPATERS SHALL BE PLACED AT THE OUTFALL OF ALL DETENTION FACILITIES AS NECESSARY TO PROVIDE A STABILIZED TRANSITION FROM THE FACILITY TO THE RECEIVING CHANNEL. h. ALL ON -SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE. i. INCREASED VOLUMES OF SHEET FLOWS THAT MAY CAUSE EROSION OR SEDIMENTATION ON ADJACENT PROPERTY SHALL BE DIVERTED TO A STABLE OUTLET, ADEQUATE CHANNEL, PIPE OR PIPE SYSTEM, OR TO A DETENTION FACILITY. j. IN APPLYING THESE STORMWATER RUNOFF CRITERIA, INDIVIDUAL LOTS OR PARCELS IN A RESIDENTIAL, COMMERCIAL OR INDUSTRIAL DEVELOPMENT SHALL NOT BE CONSIDERED TO BE SEPARATE DEVELOPMENT PROJECTS. INSTEAD THE DEVELOPMENT, AS A WHOLE, SHALL BE CONSIDERED TO BE A SINGLE DEVELOPMENT PROJECT. HYDROLOGIC PARAMETERS THAT REFLECT THE ULTIMATE DEVELOPMENT CONDITION SHALL BE USED IN ALL ENGINEERING CALCULATIONS. k. ALL MEASURES USED TO PROTECT PROPERTIES AND WATERWAYS SHALL BE EMPLOYED IN A MANNER WHICH MINIMIZES IMPACTS ON THE PHYSICAL, CHEMICAL AND BIOLOGICAL INTEGRITY OF RIVERS, STREAMS AND OTHER WATERS OF THE STATE. ACTION: IT IS THE OPINION OF THE ENGINEER THAT THE EXISTING STORM SEWER IS ADEQUATE TO CONVEY STORMWATER FOR THIS SITE. I. PROJECT DESCRIPTION: THE SUBJECT SITE IS LOCATED ALONG US ROUTE 29 SEMINOLE TRAIL ROAD AND ASHWOOD BOULEVARD THE TOTAL DISTURBED AREA FOR THE WORK PROPOSED WITH THIS PLAN IS 18.78 ACRES. THE PURPOSE OF THIS PROJECT IS TO CONSTRUCT FOUR (4) APARTMENT BUILDINGS AND SD((6) STRIPS OF TOWNHOMES, AS WELL AS AMENITY AREAS AND ASSOCIATE PARKING. TO SERVICE THE PROPOSED DEVELOPMENT THIS PLAN WILL ALSO INCLUDE THE INSTALLATION OF SANITARY SEWER, WATER LINES, AND STORM INFRASTRUCTURE THAT WILL SERVE THE PROPOSED PARKING AREAS. THERE WILL ALSO BE TWO (2) UNDERGROUND DETENTION SYSTEMS WITH AN ISOLATOR ROW PRETREATMENT STRUCTURE CONSTRUCTED WITH THIS PLAN. THE TOTAL PROJECT IS ANTICIPATED TO TAKE EIGHTEEN (18) MONTHS TO COMPLETE. II. EXISTING SITE CONDITIONS: THE EXISTING SITE CONSISTS OF ABOUT 4.04 ACRES OF IMPERVIOUS AREA WITH SEVERAL TRAILERS AND GRAVEL LOTS SURROUNDED BY DEVELOPED GRASSED AREA. THE REMAINDER OF THE SITE CONSIST OF MOSTLY WOODED AREAS. EXISTING GRADES ON SITE ARE MOSTLY BETWEEN 0 AND 50 % WITH SEVERAL AREAS OF PRESERVED STEEP SLOPES AS INDICATED ON THE PLANS. THE TWO PROPOSED PARCELS WITHIN THIS PLAN DO NOT CONTAIN AREAS OF THE 100-YEAR FLOODPLAIN, AND NO WETLANDS OR STREAM CORRIDORS ARE IDENTIFIED. III. ADJACENT PROPERTY: THE SITE IS BORDERED TO THE NORTH BY SEMINOLE TRAIL, ROUTE 29 TO THE EAST BY SINGLE FAMILY RESIDENTIAL PARCELS, TO THE SOUTH BY THE FOREST LAKES RESIDENTIAL DEVELOPMENT, AND TO THE WEST BY ASHWOOD BOULEVARD. IV_ OFFSITE AREAS: THE PROPOSED PROJECT HAS BEEN DESIGNED TO MINIMIZE THE IMPORT AND/OR EXPORT OF DIRT FOR THE SITE. HOWEVER, IT IS ANTICIPATED THAT THERE WILL BE EXCESS FILL NEEDED TO BE TRANSPORTED ON SITE DURING CONSTRUCTION.THE CONTRACTOR IS RESPONSIBLE FOR COORDINATING ANY DISTURBANCE OFFSITE AND FOR ANY REQUIRED PLANS AND PERMITS THAT MAY BE REQUIRED. V. SOILS: A STUDY WILL BE PREPARED AT A FUTURE DATE. PER THE USGS WEB SOIL SURVEY, THE SOILS OF THE SUBJECT SITE ARE ENTIRELY HSG B. VI. CRITICALAREAS: THERE ARE SEVERAL EXISTING CRITICAL AREAS ON THE SITE INCLUDING AREAS OF PRESERVED SLOPES. APPROPRIATE MEASURES HAVE BEEN BUT INTO PLACE TO MINIMIZE THE IMPACT TO ALL CRITICAL AREAS THAT ARE IN CLOSE PROXIMITY TO THE PROPOSED PROJECT AREA ASSOCIATED WITH THIS PLAN. VII. EROSION AND SEDIMENT CONTROL MEASURES: UNLESS OTHERWISE NOTED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK (VESCH). THE MINIMUM STANDARDS OF VESCH SHALL BE ADHERED TO UNLESS OTHERWISE WAIVED OR APPROVED BY A VARIANCE. SPECIFIC EROSION AND SEDIMENT CONTROL MEASURES UTILIZED IN THIS PROJECT INCLUDE THE FOLLOWING: 1. SAFETY FENCE -3.01 • A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. SAFETY FENCE SHALL BE INSTALLED AROUND THE LIMITS OF DISTURBANCE TO PREVENT PEDESTRIAN TRAFFIC ON SITE 2. TEMPORARY STONE CONSTRUCTION ENTRANCE - 3.02 • A STABILIZED STONE PAN WITH A FILER FABRIC UNDERLINER LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE 3. SILT FENCE- 3.05 • A PROTECTIVE BARRIER TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE. 4. SUPER SILT FENCE - N/A • REINFORCED SILT FENCE TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PRESENT SEDIMENT FROM LEAVING THE SITE. 5. STORM DRAIN INLET PROTECTION - 3.07 • A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET. 6. CULVERT INLET PROTECTION - 3.08 • A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS. 7. TEMPORARY DIVERSION DIKE -3.09 • A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. 8. TEMPORARY SEDIMENT TRAP -3.13 • A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. 9. TEMPORARY SEDIMENT BASIN - 3.14 • A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWATER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. 10. TEMPORARY SLOPE DRAIN - 3.15 • A FLEXIBLE TUBING OR CONDUIT EXTENDING FROM THE TOP TO THE BOTTOM OF A CUT OR FILL SLOPE. 11. OUTLET PROTECTION - 3.18 • STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED AT 12. TOPSOILING-3.30 • METHODS OF PRESERVING AND USING THE SURFACE LAYER OF UNDISTURBED SOIL, OFTEN ENRICHED IN ORGANIC MATTER, IN ORDER TO OBTAIN A MORE DESIRABLE PLANTING AND GROWTH MEDIUM. 13. TEMPORARY SEEDING - 3.31 • THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. 14. PERMANENT SEEDING -3.32 • THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING SEED. 15. SOIL STABILIZATION BLANKETS & MATTING - 3.36 • THE INSTALLATION OF A PROTECTIVE COVERING (BLANKET) OR A SOIL STABILIZATION MAT ON A PREPARED PLANTING AREA OF A STEEP SLOPE, CHANNEL OR SHORELINE 16. TREE PRESERVATION & PROTECTION - 3.38 • PROTECTION OF DESIRABLE TREES FROM MECHANICAL AND OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. 17. DUST CONTROL - 3.39 • REDUCING SURFACE AND AIR MOVEMENTS OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. ALL MATERIALS INDICATED ON THESE PLANS SHALL CONFORM TO THE SPECIFICATIONS AND INSTALLATION GUIDELINES SET FORTH IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK (LATEST EDITION), AND THE DETAILS AND SPECIFICATIONS SHOWN HEREIN. Vill. SEQUENCE OF CONSTRUCTION: PHASE IA SEQUENCE OF CONSTRUCTION 1. OBTAIN ALL REQUIRED PERMITS. 2. ATTEND PRE -CONSTRUCTION MEETING. 3. CONTRACTOR SHALL CONTACT JURISDICTION AT LEAST 1 WEEK PRIOR TO COMMENCING CONSTRUCTION. 4. CONTRACTOR SHALL STAKE AND FLAG LIMITS OF DISTURBANCE. 5. CONTRACTOR TO USE THE EXISTING ENTRANCE ON SITE AS CONSTRUCTION ENTRANCES PRIOR TO GRADING AND INSTALLING THE PROPOSED CONSTRUCTION ENTRANCE ALONG ASHWOOD BLVD. 6. DEMO ALL FEATURES NEEDED TO INSTALL ALL PERIMETER CONTROLS. 7. PERFORM GRADING SHOWN IN PHASE IA TO INSTALL THE CONSTRUCTION ENTRANCES PRIOR TO THE START OF ANY MASS EARTH MOVING ACTIVITIES. 8. CONTRACTOR TO GRADE AND INSTALL ALL SEDIMENT TRAPS AND SEDIMENT BASINS AS SHOWN IN PHASE OF THE EROSION AND SEDIMENT CONTROL PLAN. 9. CONTRACTOR TO PROVIDE TEMPORARY SEEDING AND DUST CONTROL OF ALL DISTURBED AREAS AS NEEDED. NOTE: • INITIAL DISTURBANCE SHALL BE LIMITED TO ONLY THE DISTURBANCE NECESSARY TO INSTALL INITIAL PERIMETER CONTROL AND MEASURES. • CONTRACTOR SHALL NOT COMMENCE PHASE IB OF THE EROSION AND SEDIMENT CONTROL PLAN PRIOR TO THE COUNTY EROSION AND SEDIMENT CONTROL INSPECTORS APPROVAL AND COMPLETION OF ALL PHASE IA CONSTRUCTION. PHASE IB SEQUENCE OF CONSTRUCTION 1. CONTRACTOR TO BEGIN MASS EARTHWORK OPERATION TO REACH PROPOSED PAD ELEVATIONS. AS THE EARTHWORK OPERATION IS BEING PERFORMED CONTRACTOR TO ENSURE THAT ALL TEMPORARY DIVERSIONS ARE MAINTAINED TO KEEP RUNOFF DIRECTED TO THE EROSION AND SEDIMENT CONTROL MEASURES SHOWN IN PHASE IB OF THE EROSION AND SEDIMENT CONTROL PLAN. 2. CONTRACTOR SHALL GRADE AND BUILD THE SD( TOWNHOMES PROPOSED WITHIN SB-1 LAST SO THAT SB-1 CAN REMAIN IN USE UNTIL THE SITE ADJACENT AND UPHILL OF THE SEDIMENT BASIN IS PERMANENTLY STABILIZED. 3. ONCE SITE IS STABILIZED AND STORM DRAINAGE NETWORK IS INSTALLED AND IN USE, CONTRACTOR TO MUSK OUT SEDIMENT BASIN AND OVEREXCAVATE TO UNSATURATED SOIL. CONTRACTOR TO BEGIN WALL CONSTRUCTION TO BRING REST OF SITE UP TO GRADE AND FINALIZE TOWNHOME PADS. 4. CONTRACTOR SHALL KEEP ST-1 ST-2 ST-3A ST4 AND SB-1 OPERATING UNTIL SITE IMMEDIATELY ADJACENT AND UPHILL OF THE SEDIMENT TRAPS IS PERMANENTLY STABILIZED. 5. CONTRACTOR TO BEGIN INSTALLATION OF ADS SYSTEM 1. 5.1. STORMTECH MC-7200 CHAMBERS SHALL NOT BE INSTALLED UNTIL THE MANUFACTURER'S REPRESENTATIVE HAS COMPLETED A PRE -CONSTRUCTION MEETING WITH THE INSTALLERS OR PRIOR TO UPSLOPE STABILIZATION. 5.2. STORMTECH MC-7200 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-7200 CONSTRUCTION GUIDE". 5.3. CHAMBERS ARE NOT TO BE BACKFILLED WITH A DOZER OR EXCAVATOR SITUATED OVER THE CHAMBERS STORMTECH RECOMMENDS 3 BACKFILL METHODS: 5.3.1. STONESHOOTER LOCATED OFF THE CHAMBER BED. 5.3.2. BACKFILL AS ROWS ARE BUILT USING AN EXCAVATOR ON THE FOUNDATION STONE OR SUBGRADE. 5.3.3. BACKFILL FROM OUTSIDE THE EXCAVATION USING A LONG BOOM HOE OR EXCAVATOR. 5.4. THE FOUNDATION STONE SHALL BE LEVELED AND COMPACTED PRIOR TO PLACING CHAMBERS. 5.5. JOINTS BETWEEN CHAMBERS SHALL BE PROPERLY SEATED PRIOR TO PLACING STONE. 5.6. MAINTAIN MINIMUM - 9" (230 MM) SPACING BETWEEN THE CHAMBER ROWS. 5.7. INLET AND OUTLET MANIFOLDS MUST BE INSERTED A MINIMUM OF 12" (300 MM) INTO CHAMBER END CAPS. 5.8. EMBEDMENT STONE SURROUNDING CHAMBERS MUST BE A CLEAN, CRUSHED, ANGULAR STONE MEETING THE AASHTO M43 DESIGNATION OF #3 OR #4. 5.9. STONE SHALL BE BROUGHT UP EVENLY AROUND CHAMBERS SO AS NOT TO DISTORT THE CHAMBER SHAPE. STONE DEPTHS SHOULD NEVER DIFFER BY MORE THAN 12" (300 MM) BETWEEN ADJACENT CHAMBER ROWS. 5.10. STONE MUST BE PLACED ON THE TOP CENTER OF THE CHAMBER TO ANCHOR THE CHAMBERS IN PLACE AND PRESERVE ROW SPACING. 5.11. THE CONTRACTOR MUST REPORT ANY DISCREPANCIES WITH CHAMBER FOUNDATION MATERIAL BEARING CAPACITIES TO THE SITE DESIGN ENGINEER 5.12. ADS RECOMMENDS THE USE OF "FLEXSTORM CATCH IT" INSERTS DURING CONSTRUCTION FOR ALL INLETS TO PROTECT THE SUBSURFACE STORMWATER MANAGEMENT SYSTEM FROM CONSTRUCTION SITE RUNOFF SEE SHEET C-908 AND C-909 FOR MORE INFORMATION REGARDING THE ADS STORMTECH SYSTEMS. NOTE: THE COUNTY E&S INSPECTOR SHALL APPROVE PREVIOUS PHASE PRIOR TO THE NEXT PHASE COMMENCING. PHASE II SEQUENCE OF CONSTRUCTION 1. CONTRACTOR TO INSTALL REMAINING UTILITIES ON SITE INCLUDING PROPOSED WATERLINE, SANITARY MAIN, AND STORM SEWER. 2. CONTRACTOR TO INSTALL STORM INLET PROTECTION IMMEDIATELY AFTER PROPOSED STORM INLETS ARE INSTALLED. 3. CONTRACTOR TO BEGIN CONSTRUCTION OF THE PROPOSED BUILDINGS. 4. CONTRACTOR TO CONSTRUCT THE REMAINING CURB AND GUTTER FOR THE PARKING AREAS. 5. CONTRACTOR TO INSTALL THE PROPOSED ISOLATOR ROW. 6. CONTRACTOR TO BASE PAVE THE PARKING AREAS. 7. CONTRACTOR TO BEGIN INSTALLATION OF ADS SYSTEM 2. 7.1. FOLLOW SYSTEM 1 INSTALLATION NOTES IN PHASE IB SEQUENCE ABOVE. SEE SHEET C-908 AND C-909 FOR MORE INFORMATION REGARDING THE ADS STORMTECH SYSTEMS. 8. CONTRACTOR TO INSTALL ALL PROPOSED SIDEWALKS. 9. CONTRACTOR TO PERMANENTLY SEED ALL DISTURBED AREAS AS SOON AS FINAL GRADE IS MET. 10. CONTRACTOR SHALL KEEP ST-1, ST-2, ST-3A, ST4, AND SB-1 OPERATING UNTIL SITE IMMEDIATELY ADJACENT AND UPHILL OF THE SEDIMENT TRAPS IS PERMANENTLY STABILIZED. 11. CONTRACTOR TO BUILD WALLS AND SIX (6) TOWNHOMES IN THE SOUTHEAST CORNER OF THE SITE ONCE SYSTEM 1 IS FULLY OPERATING AND SITE IMMEDIATELY ADJACENT AND UPHILL IS PERMANENTLY STABILIZED. NOTE: THE COUNTY E&S INSPECTOR SHALL APPROVE PREVIOUS PHASE PRIOR TO THE NEXT PHASE COMMENCING IX. MAINTENANCE PROGRAM: 1. SAFETY FENCE -3.01 SAFETY FENCE SHALL BE CHECKED REGULARLY FOR WEATHER -RELATED OR OTHER DAMAGE. ANY NECESSARY REPAIRS MUST BE MADE IMMEDIATELY. CARE SHOULD BE TAKEN TO SECURE ALL ACCESS POINTS (GATES) AT THE END OF EACH WORKING DAY. ALL LOCKING DEVICES MUST BE REPAIRED OR REPLACED AS NECESSARY. 2. TEMPORARY STONE CONSTRUCTION ENTRANCE - 3.02 THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOW OF MUD ONTO PUBLIC RIGHTS -OF -WAY. THIS MAY REQUIRE PERIODIC TOP DRESSING WITH ADDITIONAL STONE OR THE WASHING AND REWORKING OF EXISTING STONE AS CONDITIONS DEMAND AND REPAIR AND/OR CLEANOUT OF ANY STRUCTURES USED TO TRAP SEDIMENT. ALL MATERIALS SPILLED, DROPPED, WASHED, OR TRACKED FROM VEHICLES ONTO ROADWAYS OR INTO STORM DRAINS MUST BE REMOVED IMMEDIATELY. THE USE OF WATER TRUCKS TO REMOVE MATERIAL DROPPED, WASHED, OR TRACKED ONTO ROADWAYS WILL NOT BE PERMITTED UNDER ANY CIRCUMSTANCES. 5. SILT FENCE - 3.05 SILT FENCES SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. ANY REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY. . CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCES RESULTING FROM END RUNS AND UNDERCUTTING. . SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. . SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN THE LEVEL OF DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIERS. . ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED AND SEEDED. 6. SUPER SILT FENCE - N/A . SILT FENCES SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. ANY REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY. . CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCES RESULTING FROM END RUNS AND UNDERCUTTING- . SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN THE LEVEL OF DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIERS. . ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED AND SEEDED. 8. STORM DRAIN INLET PROTECTION - 3.07 . THE STRUCTURE SHALL BE INSPECTED AFTER EACH RAIN AND REPAIRS MADE AS NEEDED. SEDIMENT SHALL BE REMOVED AND THE TRAP RESTORED TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE HALF THE DESIGN DEPTH OF THE TRAP. REMOVED SEDIMENT SHALL BE DEPOSITED IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE. . STRUCTURES SHALL BE REMOVED AND THE AREA STABILIZED WHEN THE REMAINING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED. 9. CULVERT INLET PROTECTION - 3.08 . THE STRUCTURE SHALL BE INSPECTED AFTER EACH RAIN AND REPAIRS MADE AS NEEDED. . AGGREGATE SHALL BE REPLACED OR CLEANED WHEN INSPECTION REVEALS THAT CLOGGED VOIDS ARE CAUSING PONDING PROBLEMS WHICH INTERFERE WITH ON -SITE CONSTRUCTION. . SEDIMENT SHALL BE REMOVED AND THE IMPOUNDMENT RESTORED TO ITS ORIGINAL DIMENSIONS WHEN SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DESIGN DEPTH. REMOVED SEDIMENT SHALL BE DEPOSITED IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE AND CAUSE SEDIMENTATION PROBLEMS. . TEMPORARY STRUCTURES SHALL BE REMOVED WHEN THEY HAVE SERVED THEIR USEFUL PURPOSE, BUT NOT BEFORE THE UPSLOPE AREA HAS BEEN PERMANENTLY STABILIZED. 10. TEMPORARY DIVERSION DIKE -3.09 • THE MEASURE SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET OR SEDIMENT TRAPPING FACILITY, AS NECESSARY. ONCE EVERY TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED. DAMAGES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END OF EACH WORKING DAY. 14. TEMPORARY SEDIMENT TRAP - 3.13 • SEDIMENT SHALL BE REMOVED AND THE TRAP RESTORED TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE HALF THE DESIGN VOLUME OF THE WET STORAGE. SEDIMENT REMOVAL FROM THE BASIN SHALL BE DEPOSITED IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE AND CAUSE SEDIMENTATION PROBLEMS. • FILTER STONE SHALL BE REGULARLY CHECKED TO ENSURE THAT FILTRATION PERFORMANCE IS MAINTAINED. STONE CHOKED WITH SEDIMENT SHALL BE REMOVED AND CLEANED OR REPLACED. • THE STRUCTURE SHOULD BE CHECKED REGULARLY TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT. THE HEIGHT OF THE STONE OUTLET SHOULD BE CHECKED TO ENSURE THAT ITS CENTER IS AT LEAST 1 FOOT BELOW THE TOP OF THE EMBANKMENT. 15. TEMPORARY SEDIMENT BASIN - 3.14 • THE BASIN EMBANKMENT SHOULD BE CHECKED REGULARLY TO ENSURE THAT IT IS STRUCTURALLY SOUNDS AND HAS NOT BEEN DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT. • THE EMERGENCY SPILLWAY SHOULD BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION -RESISTANT. • THE BASIN SHOULD BE CHECKED AFTER EACH RUNOFF -PRODUCING RAINFALL FOR SEDIMENT CLEANOUT. WHEN THE SEDIMENT REACHES THE CLEAN -OUT LEVEL, IT SHALL BE REMOVED AND PROPERLY DISPOSED OF. 16. TEMPORARY SLOPE DRAIN - 3.15 THE SLOPE DRAIN STRUCTURE SHALL BE INSPECTED WEEKLY AND AFTER EVERY STORM, AND REPAIRS MADE IF NECESSARY. THE CONTRACTOR SHOULD AVOID THE PLACEMENT OF ANY MATERIAL ON AND PREVENT CONSTRUCTION TRAFFIC ACROSS THE SLOPE DRAIN. 20. ROCK CHECK DAMS - 3.20 • CHECK DAMS SHOULD BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EACH RUNOFF -PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. • REGULAR INSPECTIONS SHOULD BE MADE TO INSURE THAT THE CENTER OF THE DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 31. SOIL STABILIZATION BLANKETS & MATTING - 3.36 . ALL SOIL STABILIZATION BLANKETS AND MATTING SHOULD BE INSPECTED PERIODICALLY FOLLOWING INSTALLATION, PARTICULARLY AFTER RAINSTORMS TO CHECK FOR EROSION AND UNDERMINING. ANY DISLOCATION OR FAILURE SHOULD BE REPAIRED IMMEDIATELY. IF WASHOUTS OR BREAKAGE OCCURS, REINSTALL THE MATERIAL AFTER REPAIRING DAMAGE TO THE SLOPE OR DITCH. CONTINUE TO MONITOR THESE AREAS UNTIL WHICH TIME THEY BECOME PERMANENTLY STABILIZED; AT THAT TIME AN ANNUAL INSPECTION SHOULD BE ADEQUATE. X. STABILIZATION: TEMPORARY SEEDING WILL BE PROVIDED IN ACCORDANCE TO VESCH REQUIREMENTS THROUGHOUT CONSTRUCTION. FINAL SEEDING AND SODDING INSTALLATION PER THE SPECIFICATIONS PROVIDED ON SHEET C-617 WILL OCCUR ONCE THE SITE HAS BEEN FINAL GRADED AND THE IMPROVEMENTS ARE COMPLETE. XI. STORMWATER RUNOFF CONSIDERATIONS: REFER TO SHEETS C-901 TO C-908 FOR STORMWATER RUNOFF CONSIDERATIONS. XII. CALCULATIONS: REFER TO SHEETS C-901 TO C-909 FOR STORMWATER RUNOFF CONSIDERATIONS. XIII. OTHER IMPORTANT NOTES: 1. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLANS SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 2. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NOT SHOWN HEREON THAT ARE DEEMED NECESSARY BY THE APPROVING AUTHORITY AND/OR SITE INSPECTOR. 4. ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING AND GRADING. 5. THE CONTRACTOR SHALL PROVIDE ADEQUATE MEANS OF CLEANING MUD FROM TRUCKS AND/OR OTHER EQUIPMENT PRIOR TO ENTERING THE PUBLIC RIGHT-OF-WAY. WATER TRUCKS SHALL BE UTILIZED IN THE EVENT THAT A PUBLIC WATER SOURCE IS NOT AVAILABLE. IT IS THE CONTRACTOR'S RESPONSIBILITY TO CLEAR THE STREETS AND TAKE WHATEVER MEASURES NECESSARY TO ENSURE THAT THE STREETS ARE MAINTAINED IN A CLEAN AND DUST -FREE CONDITION AT ALL TIMES. 6. IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO PERFORM THE WORK IN SUCH A MANNER AS TO PREVENT THE WASHING OF ANY TOPSOIL OR DEBRIS ONTO ADJACENT PROPERTIES. 7. THE CONTRACTOR SHALL ENSURE THAT ALL DEWATERING OPERATIONS ON THE SITE PASS THROUGH AN APPROVED EROSION AND SEDIMENT CONTROL DEVICE SUCH AS SILT FENCING, SEDIMENT TRAPS, OR SEDIMENT FILTER BAGS. EROSION AND SEDIMENT CONTROL NOTES 1. UNLESS OTHERWISE NOTED, ALL VEGETATIVE AND EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED IN ACCORDANCE WITH THE MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK (LATEST EDITION). 2. FOR ADDITIONAL DETAILS AND SPECIFICATIONS NOT SHOWN HEREON, REFER TO THE LATEST EDITION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 3. ALL EROSION CONTROL MEASURES SHALL BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING AND GRADING. 4. ALL AREAS TO BE PAVED MAYBE STABILIZED BY INSTALLATION OF BASE AND SUBBASE MATERIALS INSTEAD OF TEMPORARY VEGETATION COVER. 5. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON -SITE AT ALL TIMES. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES AS NECESSARY TO PREVENT POSSIBLE FUTURE OFF -SITE CONTAMINATION. 7. THE CONTRACTOR SHALL INSPECT ALL EROSION AND SEDIMENT CONTROL DEVICES DAILY. ANY DAMAGED CONTROLS SHALL BE REPAIRED OR REPLACED BY THE CLOSE OF EACH WORKING DAY. 8. THE CONTRACTOR MUST NOTIFY THE LANDSCAPING SUPERVISOR PRIOR TO THE INSTALLATION OF ANY TREE PROTECTION OR PLANT MATERIAL. 9. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN THOSE INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 10. THE CONTRACTOR SHALL PROVIDE ADEQUATE MEANS OF CLEANING MUD FROM TRUCKS AND/OR OTHER EQUIPMENT PRIOR TO ENTERING THE PUBLIC RIGHT-OF-WAY. IT IS THE CONTRACTORS RESPONSIBILITY TO TAKE MEASURES NECESSARY TO ENSURE THAT ADJACENT STREETS ARE MAINTAINED IN A CLEAN AND DUST -FREE CONDITION AT ALL TIMES. 11.THE CONTRACTOR SHALL ENSURE THAT ALL DEWATERING OPERATIONS ON THE SITE PASS THROUGH AN APPROVED EROSION AND SEDIMENT CONTROL DEVICE SUCH AS SILT FENCING, SEDIMENT TRAPS, OR SEDIMENT FILTER BAGS. 12. THE CONTRACTOR IS RESPONSIBLE FOR PERFORMING SITE WORK IN SUCH A MANNER AS TO PREVENT THE WASHING OF ANY TOPSOIL OR DEBRIS ONTO THE ADJACENT PROPERTIES. 13. ALL STORM AND SANITARY SEWER LINES, NOT IN STREETS, SHALL BE SEEDED AND MULCHED WITHIN 14 DAYS AFTER BACKFILL. 14. ELECTRICAL POWER, GAS SUPPLY, AND TELEPHONE TRENCHES SHALL BE COMPACTED, SEEDED, AND MULCHED WITHIN 14 DAYS AFTER BACKFILL. 15. AT THE COMPLETION OF CONSTRUCTION AND PRIOR TO ANY BOND RELEASE, ALL TEMPORARY SEDIMENT CONTROLS SHALL BE REMOVED AND ALL DENUDED AREAS STABILIZED. 16. WORK WITHIN THE RIGHT-OF-WAY SHALL BE PERFORMED IN A MANNER SO AS TO LIMIT THE DISTURBANCE TO PUBLIC TRAFFIC INCLUDING PEDESTRIAN AND BICYCLE ACCESS. ALBEMARLE COUNTY GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS: 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED DESIGNATED BORROW AREA. 11.ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14.BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:OOAM TO 9:OOPM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 16.THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 17.TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 18.PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 19.MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20.ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 21.THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G.) 22.PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER PROTECTION ORDINANCE SECTION 17-207B.) W mej x O Im 0 z EE W w w m z F of W C7 Z � Z U Z W - W H �ZL�jJ W�>W H��O) Fwa= wz W D>zU cap (q7 aQza z J)M W zp1- Of °zof aaa~o U H 0 a c9 a J (/) � Q OZ�az > a _j Ir U W H to REVISIONS REV DATE COMMENT Nx IKED BY 1 05/18/22 COUNTY COMMENTS PCM RTY 2 07/01/22 1 COUNTY COMMENETS PCM • Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 10/7/2021 CAD I.D.: ODS-O PROJECT VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLER// 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com TH RYANYAUUER Lic. No. 0402056625 07/01 /2022 SHEET TITLE: EROSION NOTES SHEET NUMBER: C-615 REVISION 2 - 07/01/22 0 rT PLATE SAFETY FENCE 3.1- PERSPECTIVE VIEW M �� va 4 3-" lyl WIRE FABRIC 'J LINE POST I'1 BRACING='� 10' GROUND LINE CONCRETE FOOTING PERSPECTIVE VIEW PLASTIC FENCE SOURCE: CONWED PLASTICS, VDOT ROAD AND BRIDGE BLOCK1 GRAVEL I'1' INLET SEDIMENT CONCRETEWIRE SCREEN BLOCK i rW rww , • 11 i��t GRAVEL FILTER WIRE SCREEN j��R wj IrIT1 �,w+. Tas.�r��"i��`,ri�i►a! `�sPi��t'r�r;�� y �•` 'IIII, j�.�� /. FILTERED WATER OVERFLOW RUNOFF WATER WITH SEDIMENT ROP INLET WITH GATE SEDIMENT SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE WHERE HEAVY FLOWS ARE EXPECTED AND WHERE AN OVERFLOW CAPACITY IS NECESSARY TO PREVENT EXCESSIVE PENDING AROUND THE STRUCTURE. * GRAVEL SHALL BE VDOT 13, 1357 OR 15 COARSE AGGREGATE. SOURCE: VA DSWC PIPE OUTLET CONDITIONS PLATE 318-1 A A 3da do PIPE OUTLET TO FLAT AREA WITH NO. DEFINED CHANNEL PLAN VIEW La 0 - d SECTION A -A ALTER CLOTF KEY IN 6"A"; RECOMMENDED FOR ENTIRE PERIMETER A A R (MIN.) da �— PIPE OUTLET TO WELL DEFINED CHANNEL PLAN VIEW 1 La d SECTION A -A FILTER CLOTH KEY IN 3"A"; RECOMMENDED NOTES: FOR ENTIRE PERIMETER 1. APRON UNING MAY BE RIPRAP, GROUTED RIPRAP, GABION BASKET, OR CONCRETE, 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED USING PLATES 3.18-3 AND 118-4. 3. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT LESS THAN 6 INCHES. SOURCE: VA. DSWC PERSPECTIVE VIEW METAL FENCE VA DSWC STONE CONSTRUCTION ENTRANCE PLATE 2-1 75' MIN, EXISTING Al 3 PAVEMENT 1 5:1 FILTER CLOTH A MOUNTABLE BERM 6° MIN. (OPTIONAL) SIDE ELEVATION EXIST[/GRGUNI 5 MIN 10' MIN. PTIONAL) 0/—WASHRACK E ' MIN 10' MIN. EX,SNNG PAVEMENT MIN. VDOT 11 GOURSE POSITIVE DRAINAGE 10 AGGREGATE B TO SEDIMENT TRAPPING DEVICE * MUST EXTEND FULL WIDTH OF INGRESS AND EGRESS PLAN VIEW OPERATION 12' MIN. 3" MIN. 3" MIN. FILTER cLOTH SECTION A -A REINFORCED CONCRETE DRNN SPACE SECTION B-B SOURCE: ADAPTED FROM 1983 MARYLAND STANDARDS FOR SOIL EROSION AND SEDIMENT CONTROL, AND VA. DSWC GRAVEL CURB INLET SEDIMENT 3 PLATE FILTER r GRAVEL* FILTER 12^ RUNOFF WATER WIRE MESH WITH SEDIMENT � IY/ FILTERED WATER B III IIII - tl n `P d:6..t__T LI�il �Lil d.. I SEDIMENT CONCRETE GUTTER 12 CURB INLET SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE PENDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. * GRAVEL SHALL BE VDOT 13, 1357 OR 5 COARSE AGGREGATE. SOURCE: VA DSWC FENCING AND ARMORING PLAE 3.38T2 DRIP SNOW BOAR[ METHODS OF TREE FENCING NCE ON as - Pi. ^"Mnn.. TRIANGULAR BOARD FENCE CORRECT TRUNK ARMORING SOURCE: VA DSWC CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) 3 STE2 I. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6'MN. / / J IIII rmw - III 3. STAPLE FILTER MATERIAL 4. BACKFILL AND COMPACT TO STAKES AND EXTEND THE EXCAVATED SOIL. y. IT INTO THE TRENCH. � IIII. � IUI nnw SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) `aw \\\ POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) SOURCE: ADAPTED FROM INSTALLATION OF STRAW AND FABRIC FILTER BARRIERS FOR SEDIMENT CONTROL,VA, DSWC, SHERWOOD AND WYANT BLOCK & GRAVEL CURB INLET 3 o7T $ SEDIMENT FILTER -CURB INLET WIRE SCREEN CONCRETE BLOCK GRAVEL FILTER 7 RUNOFF WATER WITH OVERFLOW FILTERED WATER SEDIMEN F t - II-- r SEDIMENT WIRE SCRREEN ' 2" X 4' WOOD STUD CURB INLET SPECIAL APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE AN OVERFLOW CAPABILITY IS NECESSARY TO PREVENT EXCESSIVE PENDING IN FRONT OF THE STRUCTURE. * GRAVEL SHALL BE VDOT 13, 1357 OR 15 COARSE AGGREGATE SOURCE: VA DSWC TABLE 331-B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS" Rate Planting Dates Species (lbs./acre Sept. I - Feb. 15 50150 Mix of Annual Ryegrass (Lolium multi-florum) & 50- 100 Cereal (Winter) Rye (Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass 60 - 100 (L.olium multi-florum) May 1 - Aug 31 German Millet 50 (Setaria italics) Source: Va. DSWC SILT FENCE DROP INLET PROTECTION 2 X 4" WOOD FRAME DROP INLET TWITH GRATE 1.5' MAX. FRAME 3' MIN. GATHER EXCESS AT CORNERS V PERSPECTIVE VIEWS STAKE FABRIC V9 I' MIN. ELEVATION OF STAKE AND FABRIC ORIENTATION DETAIL A SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION 15 APPLICABLE WHERE THE INLET DRAINS A RELATIVELY FLAT AREA (SLOPE NO GREATER THAN 5%) WHERE THE INLET SHEET OR OVERLAND FLOWS (NOT EXCEEDING 1 C.F.S.) ARE TYPICAL. THE METHOD SHALL NOT APPLY TO INLETS RECEIVING CONCENTRATED FLOWS, SUCH AS IN STREET OR HIGHWAY MEDIANS. SOURCE: N.C. EROSION AND SEDIMENT CONTROL PLANNING AND DESIGN MANUAL, 1988 SILT FENCE CULVERT INLET PLTE 3 08-1 PROTECTION �NDwaLL TOE OF FILL �ULVERT 3 TOE OF FILL SILT FENC o *DISTANCE IS 6' MINIMUM IF FLOW IS L FLOW TOWARD EMBANKMENT *OPTIONAL STONE COMBINATION FLOW - 2.5' - VDOT 13, 1357, 15, 156 OR 157/ CLASS I RIPRAP COARSE AGGREGATE TO REPLACE SILT FENCE IN "HORSESHOE' WHEN HIGH VELOCITY OF FLOW IS EXPECTED SOURCE: ADAPTED from VDOT Standard Sheets and Va. DSWC 1992 339 STD & SPEC 3.39 DUST CONTROL pC Definition Reducing surface and air movement of dust during land disturbing, demolition and construction activities. To prevent surface and air movement of dust from exposed sail surfaces and reduce the presence of airborne substances which may present health hazards, traffic safety problems or harm animal or plant life. Conditions Where Practice Applies In areas subject to surface and air movement of dust where on -site and off -site damage is likely to occur if preventive measures are not taken. ITT 414 GRAVEL AND WIRE MESH DROP 30 T? INLET SEDIMENT FILTER FILTERED WATER SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE WHERE HEAVY CONCENTRATED FLOWS ARE EXPECTED BUT NOT WHERE PENDING AROUND THE STRUCTURE MIGHT CAUSE EXCESSIVE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. * GRAVEL SHALL BE VDOT 13, 1357 OR 15 COARSE AGGREGATE. SOURCE: VA DSWC TEMPORARY DIVERSION DIKE SOURCE: VA. DSWC Comnacted Soil TABLE 3.31-A LIMING REQUIREMENTS FOR TEMPORARY SITES Recommended Application pH Test of Agricultural Limestone below 4.2 3 tons per acre 4.2 to 5.2 2 tons per acre 5.2 to 6 1 ton per acre TABLE 3.31-C TEMPORARY SEEDING PLANT MATERIALS, SEEDING RATES, AND DATES PLATE 3.09-1 SEEDING RATE NORTH° SOUTHh PLANT SPECIES 3A SII 8/IS 2/IS 511 9/1 CHARAcTBwsTTCS Alto 1000 Rt to W to to to to 4/30 8/l5 11/1 4130 9/1 11115 OATS T Hu. (up to top lbs., 2 lbs. X - - X - - Use sprang varieties (e.g., Noble). (Avena w1u), out less than 50 lbs.) RYEe 2 bu. (up to 110 lbs., 2.5 lbs. X - X X - X Use for late fall seodings, winter Usmitle cereale) not less thin 50 lbs.) cover. Tolerates cold and low moisture. GERMAN MILLET SO lbs. approx. 1 Dr. - X - - X - Warm -season annual. Dire a1 first Setaria imlica frost. May be added to summer, mixm. ANNUAL RYEGRASS° 60111 /SS lbs. X - X X - X May be added in mixes. Will (Colin- multi-Eomm) uww not of most stands. WEEPING 15 lbs. 5'4ou. - X - - X - warm -season perennial. May LOVEGRASS bunch. Tolerates hot, dry slopes (Eaerosliscurvula and acid, infertile its. May be added to rmxe6. KOREAN 25 lbs. approx. I'h X X - X X - warm season aortal legume. LESPEDEZA` IS.. I Tolerates acid its. May be d.m sti ulacea added to mixes. a Northern Piedmont and Mountain region. See Plates 3.22-1 and 3.22-2. b Southern Piedmont and Coastal Plain. May be used as a cover crop with spring seeding. d May be used as a cover crop with fall seeding. X May be planted between these dates. . May oot be planted between these dates. g c w Z s W w m Z W, LLI Wz W- Z) 1�_wXo ('Zw Lu U, 5:C $ Z�('iH 0OfZ g ~wax w J>ZULU CD,0MIJ 0 Op<aZ~O 0 Q 0 U d& Z JIt(n Of a Q aL Z < d J of — U O w a Lu U) s O REVISIONS REV DATE COMMENT oaA1 CHECI 1 05/18/22 COUNTY COMMENTS PC R 2 07/01/22 COUNTY COMMENETS PC Know what's below. Fall before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: ODS-0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com _00.4ALTH 1"n RTAN YAUI Lic. No. 0402056625 ;� 07/01/2022 SHEET TITLE: EROSION DETAILS SHEET NUMBER: C-616 REVISION 2 - 07/01/22 0 n FLEXSTORM CATCH -IT FILTERS FOR TEMPORARY INLET PROTECTI❑N PRODUCT SELECTION AND SPECIFICATION DRAWING GALVANIZED STEEL FRAMING GALVANIZE➢ STEEL W/LIF7 HANDLES /GALA HANDLES ��_ i UL iIMA1E dvPF$$� UL' ARE \__01 -REPLACEABLE FILTER BAG W/STAINLESS CLAMPING BAND FLEI(STORM CAT01-R INIFT FILTERS FLEXSTONM CAT04 IT INLET FIRERS FOR FOR ROUND OFENIMG SQUNILIftCTA UTA OPENINGS B GUARD FLAP NETIC TIE DOWNS FILTER BAG W/STAINLESS CLAMPING PAN FUEXSTORM CATOI-I IN ET FIRERS FOR CURB BOX OFENINGS IMW/WM CUTS WAIF) Product selection for FLEXSTORM CATCHdT Filters (Temporary Inlet Protection) JR HOE JBS Ctlafog Bag Cep. FX Flow TOOT Standard Cato ft # NNt Type Orate 8W Opening Ike Ratings ADS PM FS TROT aid. 012, 3123 Curb Box (CB) 36.25 x 21,75 32.0 x 17.75 3.4 2.0 62LCBFX 010, 025, 041 TDOT aid. #18 3061 Square/Rect (SO) 24.875 x 20.25 (4) 48 IT 24 6.2 3.8 62XLSOFX HOE 518 4254 Squere/Rect (SO) 24 x 36 22 IT 34 3.5 2.4 62LS02436FX FLOE 525 3080 Curb Box (CB) 35.5 x 17.5 33.0 x 16.0 3.8 2.2 62LCBEXTFX Nestwile. TN std. 33W Curb Box (CB) 31.375 x 21.375 29.5 IT 19.0 3.3 2.0 62LCBFX CB HOE 280 4075 Square/Rest (So) 24 x 24 22 x 22 2.2 1.8 62MS220FX Mornphs TN Bid HOE 320 4190 Squere/Rect (SO) 25.75 x 25.75 23.75 x 23-75 3.1 1.9 62MSQFX *10 #1 4220/4330 Square/Red (So) 27.75 x 27.75 26 IT 26 5.0 2.3 62LSQFX Metro Nashville FIDE 568 4300/7310/4 Square/Red (SO) 31.5 x 31.5 30.0 x 30.0 5.4 2.5 62XLSQFX TROT aid. #42 HOE 595 4200/4260 Square/Red (SO) 35.5 IT 35.5 33.25 X 33.25 6.1 2.8 62XLSGFX .FLOW RATINGS SHOWN ARE 50X MAXIMIUM NOTES, INSTALLATION, ALL FRAMING IS CONSTRUCTED OF CORROSION RESISTANT STEEL FRAMING FOR 1. REMOVE GRATE PROLONGED PRODUCT LIFE. 2. DROP FLEXSTORM INLET 2. TOTAL BYPASS CAPACITY WILL VARY WITH EACH SIZED DRAINAGE STRUCTURE. FILTER ONTO LOAD BEARING FLEXSTORM DESIGNS FRAMING BYPASS TO MEET OR EXCEED THE DESIGN FLOW OF THE LIP OF CASTING OR PARTICULAR DRAINAGE STRUCTURE CONCRETE STRUCUTRES MAY REWIRE ADDITIONAL CONCRETE STRUCTURE REVIEW. 3. REPLACE GRATE 3. UPON ORDERING THE ADS P/N CONFIRMATION OF THE DOT CALLOUT. FLEXSTORM ITEM CODE, CASTING MAKE AND MODEL, OR DETAILED DIMENSIONAL FORMS MUST BE PROVIDED. 4. FOR WRITTEN SPECIFICATIONS AND MAINTENANCE GUIDELINES VISIT V V W.INLETFILTERS.CDM RISER PIPE BASE CONDITIONS PLAE 314T3 III - I II I ,- 1I -II-III= IIII 1�1-1I6 IIIIIIIIIIIIIII N d0i_ IIh III: 11= III o I�li�lll-III III I1111 10 III: III 111II- JIIIII IW IIIIII m IIIIII IIIIII Ililll III-III-IIIIII SOURCE: VA DSWC EXCAVATED EARTH SPILLWAY PLATE 3.14-9 LEVEL PDRTION � P � CREST AND CONTROL SECTION CHANNEL BERM N DUT SECTOR NOTE: NEITHER THE LOCATION NOR ALIGNMENT OF THE CONTROL SECTION HAS TO COINCIDE WITH THE CENTERLINE OF THE EMBANKMENT it PLAN VIEW WATER SURFACE X- LENGTH OF EXIT CHANNEL STAGE (Hp) - - CONTROL SECTION AN Ir LEVEL OR -lllu�l EXIT SECTOR APPROACH GREATER CHANNEL S PROFILE ALONG CENTERLINE d CROSS-SECTION AT CONTROL SECTION SOURCE: USDA-SCS PLATE ANTI -SEEP COLLAR 3.14-4 SOURCE: VA DSWC ANTI -VORTEX DEVICE DESIGN 3.14T10 oF� iw `�" in m w 020 two ¢o alr ¢3W a'o 8 �Ow Q~ QH U= o y o o o¢ w LL< a n Z N O O O U_ E � O w 3 O N O O O aN it 0 0 � I w a � - Z Z - o a - � d U O w SOURCE: USDA-SCS TEMPORARY SEDIMENT TRAP 1-1 VARIABLE ORIGINAL OROU VARIABLE UN. tA' - 67 CU. YD./ACRE VARMeE 67 W. YD./ACRE IT OaVAMD) v MA)(. FLTIR CLOTH KXBO GRd1ND f1EV. SEE PUTE 3.13-1 COARSE AGGREGATECIASS I RPRAP CROSS SECTION OF OUTLET CUSS I RIPRAP X1EAB DRMAA DNERSION DIKE �g COARGE �REGATE EXCAVATED (/"FILTER CLOTH / "COARSE AGGREGATE SHALL BE VOOT /3, /357 OR j5 OUTLET (PERSPECTIVE VIEW) EMERGENCY SPILLWAY PLAE 3. 4T 5 0 3 o w ��oLL SOURCE: VA DSWC DETAILS OF CORRUGARED METAL 314-13 ANTI -SEEP COLLAR INSTALL COLLAR WITH CORRUGATIONS VERTICAL COLLAR TO BE OF SAME CAGE AS CONTINUOUS THE PIPE WITH WHICH IT IS USED WELD 1/2" X 2" SLOTTED 1Y HOLES FOR 3/8' MIN. + e DIAMETER BOLTS. T2• BAND WELD BDIB S/DES L DONBNUOUS SLOTTED LYIRRUGATED METAL W50 NocLs AT SECTION B-B sNEEr MELDED ro B 8 C.C. CENLER OF BAW ELEVATION OF UNASSEMBLED COLLAR 3. UNASSEMBLED COLLARS SHALL BE MARKED BY PAINTING NOTES FOR COLLARS: OR TAGGING TO IDENTIFY MATCHING PAIRS. 1. ALL MATERIALS TO BE IN ACCORDANCE WITH 4. THE LAP BETWEEN THE TWO HALF SECTIONS AND CONSTRUCTION AND CONSTRUCTION MATERIAL BETWEEN THE PIPE AND CONNECTING BAND SHALL BE SPECIFICATIONS. CAULKED WITH ASPHALT MASTIC AT TIME OF 2. WHEN SPECIFIED ON THE PLANS, COATING OF INSTALLATION. COLLARS SHALL BE IN ACCORDANCE WITH 5. EACH COLLAR SHALL BE FURNISHED WITH TWO 1/2" CONSTRUCTION AND CONSTRUCTION MATERIAL DIAMETER RODS WITH STANDARD TANK LUGS FOR SPECIFICATIONS. CONNECTING COLLARS TO PIPE. DETAIL OF HELICAL PIPE ANTI -SEEP COLLAR SIZE AND SPACING OF SLOTTED WELD 1 1/8" X 1 1/8" X 1 1/8' ANGLES TO COLLAR OR OPENINGS SHALL BE THE SAME BEND A RD ANGLE 1 1/8" WIDE AS SHOWN IN DRAWING. AS SHOWN FOR CM COLLAR. USE RODS AND LUGS TO CLAMP 11/8 NOTE FOR BANDS AND COLLARS: BANDS SECURELY TO PIPE. MODIFICATIONS OF THE DETAILS SHOWN MAY BE USED PROVIDING EQUAL WATERTIGHTNESS �J1 8 IS MAINTAINED AND DETAILED DRAWINGS 12° ARE SUBMITTED AND APPROVED BY THE MIN. 2` ENGINEER PRIOR TO DELIVERY. BAND OF HELICAL PIPE ISOMETRIC VIEW SHEET METAL COLLAR SHALL BE CUT TO FIT CORRUGATIONS ROD AND LUG OF HELICAL BAND, AND WELDED WITH A CONTINUOUS WELD. NOTE: FOR DETAILS OF FABRICATION DIMENSIONS, MINIMUM GAGES, SLOTTED HOLES, AND NOTES, SEE DETAIL ABOVE. METAL COLLAR TO BE NOTE: TWO OTHER TYPES OF ANTI -SEEP COLLARS ARE: WELDED TO CENTER 1. CORRUGATED METAL, SIMILAR TO UPPER, EXCEPT SHOP WELDED TO A OF HELICAL PIPE BAND SHORT (AFT) SECTION OF THE PIPE AND CONNECTED WITH CONNECTING BANDS TO THE PIPE. PARTIAL ELEVATION 2. CONCRETE, SIX INCHES THICK FORMED AROUND THE PIPE WITH f3 REF ENGR FELD MANLWL REBAR SPACED 15" HORIZONTALLY AND VERTICALLY. SOURCE: USDA-SCS MINIMUM STORAGE VOLUME AND 3L4TE1 SEDIMENT STORAGE 67 C.Y./ AC.. "DRY" STORAGE DEWATERING DEVICE SEDIMENT CLEMOUT POINT (VU'STORAGE REDUCED TO 34 C.Y./ ACRE) SOURCE: VA DSWC EXAMPLE PLAN VIEWS OF BAFFLE PLAE 3.14T 6 LOCATIONS IN SEDIMENT BASINS D 2 ON SCALE INFLow-- a � RISER SHEETS OF 4' X 8' X 1/2" EXTERIOR PLYWOOD OR EQUIVALENT 4' 8' SOURCE: USDA-SCS L =TOTAL DISTANCE FROM THE POINT OF INFLOW AROUND THE BAFFLE TO THE RISER. 6' RISER CREST ELEVATION �POSIS MIN. SIZE 4" SQUARE OR 5" ROUND, SET AT LEAST 3' INTO THE GROUND. PT RISER PIPE BASE CONDITIONS 314-14 FOR EMBANKMENTS LESS THAN 10' HIGH CONCRETE BASE FOR EMBANKMENT 10' OR LESS IN HEIGHT STEEL BASE FOR EMBANKMENT 10' OR LESS IN HEIGHT SOURCE: VA DSWC 2SS SS SEDIMENT BASIN SCHEMATIC PLAE 314T2 ELEVATIONS CREST OF DESIGN HIGH WATER WATER EMERGENCY (25-YR. STORM SPILLWAY 1.0 MIN. 05 MIN. 1.0' MIN, 67 CY./ AC. RISER CREST "DRY" STORAGE DEWATERING DEVICE 67 C.Y/ AC. "WET" STORAGE SEDIMENT CLEANOUT POINT ('NET" STORAGE REDUCED TO 34 C.Y./ ACRE) DESIGN ELEVATIONS WITH EMERGENCY SPILLWAY DESIGN HIGH WATER (254R. STORM ELEV.) 2.0" MIN 0.5 MIN. 30'1MIN. 1.0' MIN. 67 C.Y./AC. °DRY sTORAG 67 C.Y./ AC �'---- - -_ _ _ __ RISER CREST 'WET' STORAGE _ DEWATERING DEVICE SEDIMENT CLEANOUI POINT DESIGN ELEVATIONS WITHOUT EMERGENCY SPILLWAY (RISER PASSES 25-YR. EVENT) SOURCE: VA DSWC PRINCIPAL SPILLWAY DESIGN PLATE17 EMERGENCY SPILLWAY DESIGN HIGH WATER CREST h ANTI -VORTEX DEVICE Br ANTI -SEEP COLLARS RISER RISER L BARREL Do I Ircl � 111 1�1 iI�T�UI- � I Ila CONICRDE BASE L H = HEAD ON PIPE THROUGH EMBANKMENT IT = HEAD OVER RISER CREST L = LENGTH OF PIPE THROUGH EMBANKMENT Dp = DIAMETER OF PIPE THROUGH EMBANKMENT Dr = DIAMETER OF RISER SOURCE: VA DSWC PLATE RECOMMENDED DEWATERING 3.14-15 SYSTEM FOR SEDIMENT BASINS SOURCE: VA DSWC PROVIDE ADEQUATE STRAPPING POLYETHYLENE CAP DEPTH VARIES AS REQUIRED PERFORATED POLYETHYLENE' FOR "DRY" DRAINAGE TUBING, DIAMETER STORAGE VARIES (SEE CALCULATIONS IN APPENDIX 3.14-A) WET 1 "FERNCO-STYLE" COUPLING STORAGE DEWATERING ORIFICE, SCHEDULE 40 STEEL STUB 1-FOOT MINIMUM, DIAMETER VARIES CORRUGATED METAL RISER (SEE CALCULATIONS IN APPENDIX 3.14-A) NOTE: WITH CONCRETE RISER, USE PVC SCHEDULE 40 STUB FOR DEWATERING ORIFICE 'DRAINAGE TUBING SHALL COMPLY WITH ASTM F667 AND AASHTO M294 LU wa Z SS W a W w Z w Sg `ti - Wz Mb-wp m wZ W $ LLU(nUUU Z_}(.9HQofTn LUZ g§ ~wax >ZULUIp0 IT) 7 2 Q Q Q oW <W o mej Z Z U) 2 w Z F I- how OZ�QFFO &Qm Ofzz00::)Q IL s o > U wm O LU U) zW s o� oa REVISIONS REV DATE COMMENT CHECKED DRAMN BY BY 1 05/18/22 COUNTY COMMENTS PCM PITY 2 07/01/22 COUNTY COMMENETS PCM Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: PITY DATE: 10/7/2021 CAD I.D.: ODS-0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com rv4.pLTH en. RVAN YAUUER Lic. No. 0402056625 ;� 07/01/2022 SHEET TITLE: EROSION DETAILS SHEET NUMBER: C-617 REVISION 2 - 07/01/22 SEDIMENT TRAP DESIGN PH IB Trap Drainage Storage Volume Dimensions Elevations Embankment Outlet Top Spillway ID Area (ac) Total "Wet" "Dry" "Wet" * L x W x D (ft) "Dry" ** L x W x D (ft) Storage Trap Bottom (ft) Clean Out***Ho (ft) El7He(H!g ( Height (ft) Width W (ft) Dimensions LxW (ft) Req. (cy) Prov. (cy) Req. (cy) Prov. (cy) Req. (cy) Prov. (cy) "Wet" (ft) "Dry" (ft) ST-1 2.00 268 325 134 135 134 190 69 x 31 x 2 77 x 39 x 2 477 479 475 476 480 3.0 2.0 2.5 12' x 14.5' ST-2 0.61 82 375 41 157 41 218 73 x 34 x 2 81 x 42 x 2 480.0 482.0 478.0 479.0 483 3.0 2.0 2.5 4' x 14.5' ST-3A 1.91 256 310 128 129 128 181 64 x 32 x 2 72 x 40 x 2 473.0 475.0 471.0 472.0 476 3.0 2.0 2.5 12' x 14.5' ST-4 2.53 340 406 170 171 170 235 74 x 37 x 2 82 x 45 x 2 467 469 465 466 470 3.0 2.0 2.5 16x 14.6 NOTES * WET DIMENSIONS: LENGTH AND WIDTH ARE AT BASE OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET DOWN TO BOTTOM OF TRAP. ** DRY DIMENSIONS: LENGTH AND WIDTH ARE AT CREST OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET UP TO CREST OF STONE OUTLET. *** THE CLEAN OUT ELEVATION SHALL BE MARKED USING STAKE OR SPRAY PAINT ON THE RISER ANTI -FLOTATION CALCULATIONS RISER DIMENSIONS BUOYANCY CALCULATIONS INTERNAL WIDTH 3 it VOLUME DISPLACED INTERNAL LENGTH 3 it RISER VOLUME = 92.01 cu. ft. WALL THICKNESS 8 in FOOTER VOLUME = 54.00 cu. ft. TOP ELEVATION 452.4 ft RISER INVERT 447.50 ft TOTAL VOLUME = 146.01 cu. ft. CONC. FILL DEPTH 0 ft BUOYANCY FORCE = 9111.09 lb. BASE WIDTH 0.00 ft BASELENGTH 0.00 ft DOWNWARD/RESISTANT FORCE VOLUME OF CONCRETE CONC. FOOTER DEPTH 1.5 ft RISER = 47.91 cu. ft. FOOTER WIDTH 6.00 ft FOOTER & FILL = 54.00 cu. ft. FOOTER LENGTH 6.00 ft OPENINGS = 1.66 cu. ft. RISER OPENINGS TOTAL CONCRETE VOL. = 100.25 cu. ft. PIPE DIAMETER 21 in ORIFICE 1 AREA 0.09 sq. ft. ORIFICE 2 AREA sq. ft. RESISTANCE FORCE = 15037.4 lb. ORIFICE 3 AREA sq. ft. WEIR 1 WIDTH ft WEIR 1 INVERT ft BUOYANCY FACTOR (MUST BE GREATER THAN 1.25 TO BE ACCEPTABLE) RESISTANT FORCE BUOYANCY FORCE BUOYANCY FACTOR 15037 / 9111 = 1.65 1.65 > 1.25 SEDIMENT TRAP DESIGN PH IA Trap Drainage Storage Volume Dimensions Elevations Embankment Outlet Top Spillway ID Area (ac) Total "Wet" "Dry" "Wet"* L x W x D (ft) "Dry"** L x W x D (ft) Storage Trap Bottom (ft) Clean Out`** (ft) Elev. (ft) Height H (ft) Height Ho (ft) Width W (ft) Dimensions L x W (ft) Req. (cy) Prov. (cy) Req. (cy) Prov. (cy) Req. (cy) Prov. (cy) "Wet" (ft) "Dry" (ft) ST-1 2.00 268 325 134 135 134 190 69 x 31 x 2 77 x 39 x 2 477 479 475 476 480 3.0 2.0 2.5 12' x 14.5' ST-2 2.15 290 375 145 157 145 218 73 x 34 x 2 81 x 42 x 2 464.5 466.5 462.5 463.5 467.5 3.0 2.0 2.5 13' x 14.5' ST-3A 1.70 228 281 114 116 114 165 61 x 30 x 2 69 x 38 x 2 473 475 471 472 476 3.0 2.0 2.5 1 V x 14.5' ST-313 1.65 222 294 111 122 111 172 62 x 31 x 2 70 x 39 x 2 474 476 472 473 477 3.0 2.0 2.5 10' x 14.5' ST-4 1.19 160 247 80 101 80 146 57 x 28 x 2 65 x 36 x 2 467 469 465 466 470 3.0 2.0 2.5 8' x 14.5' NOTES * WET DIMENSIONS: LENGTH AND WIDTH ARE AT BASE OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET DOWN TO BOTTOM OF TRAP. ** DRY DIMENSIONS: LENGTH AND WIDTH ARE AT CREST OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET UP TO CREST OF STONE OUTLET *** THE CLEAN OUT ELEVATION SHALL BE MARKED USING STAKE OR SPRAY PAINT ON THE RISER SED I M ENT BASI N D ESI GN DATA SH EET WITH AN EMERGENCY SPILLWAY PROJECT : RST RESIDENCES LOCATION : SE CORNER OF SITE BASIN ID : 1 DRAINAGE AREA : 7.90 ACRES BASIN VOLUME DESIGN WET STORAGE 1. MINIMUM REQUIRED VOLUME = 67 CU. YDS. x TOTAL DRAINAGE AREA (ACRES) 67 CY x 7.90 ACRES = 529.30 CY 2. AVAILABLE BASIN VOLUME = 529.30 CY AT ELEVATION 450.40 (FROM STORAGE - ELEVATION CURVE) 3. EXCAVATE 529.30 CY TO OBTAIN REQUIRED VOLUME * ELEVATION CORRESPONDING TO REQUIRED VOLUME = INVERT OF THE DEWATERING ORIFICE. 4. AVAILABLE VOLUME BEFORE CLEANOUT REQUIRED 33 CY x 7.90 ACRES = 264.65 CY 5. ELEVATION CORRESPONDING TO CLEANOUT LEVEL = 449.20 (FROM STORAGE - ELEVATION CURVE) 6. DISTANCE FROM INVERT OF THE DEWATERING ORIFICE TO CLEANOUT LEVEL = 1.2 FT (MIN. = 1.0 FT) DRY STORAGE 7. MINIMUM REQUIRED VOLUME = 67 CY x TOTAL DRAINAGE AREA (ACRES) 67 CY x 7.90 ACRES = 529.30 CY 8. TOTAL AVAILABLE BASIN VOLUME AT CREST OF RISER = 1,058.60 CY AT ELEVATION 452.40 (FROM STORAGE - ELEVATION CURVE) 9. DIAMETER OF DEWATERING ORIFICE = 4 IN. 10. DIAMETER OF FLEXIBLE TUBING = 6 IN. (DIAMETER OF DEWATERING ORIFICE PLUS 2 INCHES). PRELIMINARY DESIGN ELEVATIONS 11. CREST OF RISER = 452.40 TOP OF DAM = 455.00 UPSTREAM TOE OF DAM = 447.00 DESIGN HIGH WATER = 453.30 BASIN SHAPE 12. LENGTH OF FLOW (L) 115 FT 2.1 EFFECTIVE WIDTH (We) 6294 SF / 115 FT IF > 2, BAFFLES ARE NOT REQUIRED [ X ] IF < 2, BAFFLES ARE REQUIRED RUNOFF 13. Q 2 = 23.79 CFS (FROM CHAPTER 5) (7.90 ACRES x 0.60 'C' X 5.02 IN/HR AT 5 MIN Tc) 14. Q 25 = 35.46 CFS (FROM CHAPTER 5) (7.90 ACRES x 0.60 'C' X 7.48 IN/HR AT 5 MIN Tc) PRINCIPAL SPILLWAY DESIGN 15. WITH EMERGENCY SPILLWAY, REQUIRED SPILLWAY CAPACITY Qp = Q2 = 23.79 CFS (RISER AND BARREL) 16. WITH EMERGENCY SPILLWAY, ASSUMED AVAILABLE HEAD (h) = 1.0 FT (USING Q 2) h = CREST OF EMERGENCY SPILLWAY ELEVATION - CREST OF RISER ELEVATION 17. RISER DIAMETER (Dr) = 36 IN. ... ACTUAL HEAD (h) 0.9 FT (FROM PLATE 3.14-8) NOTE: AVOID ORIFICE FLOW CONDITIONS RISER CALCULATED USING THE TOTAL FLOW - 23.79 CFS 18. BARREL LENGTH (1) = 45.00 FT HEAD (H) ON BARREL THROUGH EMBANKMENT = 8.0 FT (FROM PLATE 3.14-7) 19. BARREL DIAMETER = 21" - CORRUGATED METAL PIPE (CMP) (FROM PLATE 3.14-B [CONCRETE PIPE] OR PLATE 3.14-A [CORRUGATED PIPE]) 20. TRASH RACK ANTI -VORTEX DEVICE DIAMETER = 54 IN. HEIGHT = 17 IN. (FROM TABLE 3.14-D) EMERGENCY SPILLWAY DESIGN (IN USE) 21. REQUIRED SPILLWAY CAPACITY Qe = Q25 - Qp = 11.66 CFS 22. BOTTOM WIDTH (b) = 12 FT EXIT CHANNEL SLOPE (S) = 3.70 % EXIT CHANNEL MINIMUM LENGTH (x) = 36 FT (FROM TABLE 3.14-C) ANTI -SEEP COLLAR DESIGN (IN USE) 23. DEPTH OF WATER AT PRINCIPAL SPILLWAY CREST (Y) = 5.40 FT SLOPE OF UPSTREAM FACE OF EMBANKMENT (Z) = 2.00 FT SLOPE OF PRINCIPAL SPILLWAY BARREL (Sb) = 0.0222 FT/FT LENGTH OF BARREL IN SATURATED ZONED (Ls) = 36 FT 24. NUMBER OF COLLARS REQUIRED = 1 DIMENSIONS = 5.7' x 5.7' (PER PLATE 3.14-12) FINAL DESIGN ELEVATIONS 25. TOP OF DAM = 454.90 (+0.00) DESIGN HIGH WATER = 453.90 (-1.00) EMERGENCY SPILLWAY CREST = 453.30 (IN USE) (-1.60) PRINCIPAL SPILLWAY CREST / DRY STORAGE ELEVATION = 452.40 (-2.50) DEWATERING ORIFICE INVERT / WET STORAGE ELEVATION = 450.40 (-4.50) CLEANOUT ELEVATION = 449.20 ELEVATION OF UPSTREAM TOE OF DAM = 447.00 (OR EXCAVATED BOTTOM OF "WET STORAGE AREA" IF EXCAVATION WAS PERFORMED) ELEV. AREA SF) ACC. VOL. (CF) ACC. VOL. CY 447.00 2,061 0 0 448.00 3,275 2,668 99 449.00 4,514 6,563 243 450.00 5,778 11,709 434 451.00 1 7,067 1 18,131 1 672 452.00 8,381 25,855 958 453.00 9,720 34,906 1 1,293 454.00 11,085 45,308 1 1,678 455.00 12,474 57,0881 2,114 PLATE SEDIMENT BASIN SCHEMATIC ELEVATIONS DESIGN HIGH WATER (25-YR. STORM ELEV. 453.9) 0.5 MIN. .0' MIN. 67 C.Y./ AC. "DRY" STORAGE �.- ELEV. 452.a 67 C.Y./ AC. 'WET" STORAGE ELEV. 450.4 SEDIMENT CLEANOUT POINT ELEV. 449.2 1.5, ('WEr" STORAGE REDUCED TO 34 C.Y./ ACRE) TOP OF DAM ELEV. 454.9 CREST OF EMERGENCY T SPILLWAY ELEV. 453.3 RISER CREST ELEV. 452.4 DEWATERING DEVICE ELEV. 450.4 TOP OF DAM ELEV. 454.9 ANTI -ROTATION CONCRETE BASE 6 DESIGN ELEVATIONS WITH EMERGENCY SPILLWAY SOURCE: VA DSWC W ma O In w U) F LJ w i w�(Dw> 1 z w w N j w W Q 2 W Z >zUwcn0 i 2 a Q z a u)2wzFE �ZO Q< CL 0 CJ0C]�wZ z aQ a.J REVISIONS REV DATE I COMMENT oxawx er cxecxeo ev 1 05/18/22 COUNTY COMMENTS PCM RTY 2 07/01/22 COUNTY COMMENETS PCM ju Know what§ below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AN DIOR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V 192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 101712021 CAD I.D.: ODS-0 PROJECT VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA 22911 ALBEMARLE COUNTY, VA BOHLER// I 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA 23236 Phone: (804)893-8200 VA@BohlerEng.com .T TH nt006_ Lic. No. 0402056625 6� 07/01/2022 4 SHEET TITLE: SEDIMENT TRAP AND BASIN DETAILS SHEET NUMBER: C-618 REVISION 2 - 07/01/22 OTHER REFERENCED PLANS SWPPP requirements may be fulfilled by incorporating, by reference, other plans. All Plans incorporated by reference become enforceable under the VSMP Permit Regulations and General Permit VAR10 for Discharges of Stormwater from Construction Activities. If a plan incorporated by reference does not contain all of the required elements of the PPP, the operator must develop the missing elements and include them in the SWPPP. Independent Plans Incorporated by Reference Date Approved Stormwater Management Plans (Regional or Master) THIS APP. Spill Prevention, Control, and Countermeasure Plans N/A Off -Site Stockpile N/A Off -Site Borrow Area N/A POTENTIAL POLLUTANT SOURCES The following sources of potential pollutants must be addressed in the Pollution Prevention Plan. Various controls and/or measures designed to prevent and/or minimize pollutants in stormwater discharges from the project site must be applied to the sources found on the site. Additional information concerning the follovng controls and/or measures may be found in the SWPPP. LEAKS. SPILLS. AND OTHER RELEASES ✓ The operator(s) shall ensure procedures are in place to prevent and respond to all leaks, spills and other releases of pollutants. ✓ The operator(s) shall ensure all leaks, spills and other releases of pollutant are contained and cleaned immediately upon discovery. Any contaminated materials are to be disposed in accordance with federal, state, and/or local requirements. ✓ The operator(s) shall ensure spill containment kits containing appropriate materials (e.g., absorbent material and pads, brooms, gloves, sand, etc.) are available at appropriate locations, including, but not limited to: designated areas for vehicle and equipment maintenance, vehicle and equipment fueling; storage and disposal of construction materials, products, and waste; and storage and disposal of hazardous and toxic materials; and sanitary waste facilities. ✓ The locations of the spill containment kits are identified as described below: Date Shown on Plan Sheet #S Location Approved Plan C-602 West side of the site near construction entrance. REVISIONS TO LOCATIONS Date Shown on Plan Sheet #s Location Operator(s) Initials ✓ The operator(s) shall notify the Department of Environmental Quality of leaks, spills, and other releases that discharge to or have the potential to discharge to surface waters immediately upon discovery of the discharge but in no case later than 24 after the discovery. EQUIPMENT 1 VEHICLE WASHING ✓ Washing must be conducted in a dedicated area that is located to maximize the distance from storm drain inlets, ditches, waterbodies or wetlands but no less than 50 feet from those features. ✓ All wash water used in vehicle wheel washing must be directed to a sediment basinttrap. ✓ All vehicle washing activities other than wheel washing must have secondary containment. ✓ Each facility must have appropriate signage to inform users where the dedicated areas) are located. Location of Shown on Source Activity Dedicated Area PlanWater Location Sheet s Wheel Wash West side C-602 PROP FIRELINE OR CORP STOP Other Wash West side C-602 PROP FIRELINE OR CORP STOP Areas REVISIONS TO LOCATIONS Location of Shown on Water Source Operator's Activity Dedicated Area(s) Plan Location Initials Sheet # s VEHICLE FUELING AND MAINTENANCE ✓ Conduct regular maintenance in a dedicated area that is located to maximize the distance from storm drain inlets ditches waterbodies or wetlands but no less than 50 feet from those features. ✓ If fueling is conducted at a dedicated area, the location must be located to maximize the distance from storm drain inlets, ditches, waterbodies or wetlands but no less than 50 feet from those features. ✓ The dedicated areas must be designed to eliminate the discharge of spilled and leaked fuels and chemicals from vehicle fueling and maintenance activities by providing secondary containment (spill berms, decks, spill containment pallets, providing cover where appropriate, and having spill kits readily available). ✓ Each facility must have appropriate signage to inform users where the dedicated areas) are located. Date Shown on Plan Sheet s Location of Dedicated Areas) Approved Plan C-602 West side of the site near construction entrance. REVISIONS TO LOCATIONS Date Shown on Plan Sheet s Location of Dedicated Area(s) Operator's Operat Initials ✓ If mobile fueling will be used, the fueling must be done in an area that located to maximize the distance from storm drain inlets, ditches, waterbodies or wetlands but no less than 50 feet from those features. ✓ Spill kits must be readily available at all mobile fueling locations. ✓ On -site storage tanks must have a means of secondary containment (spill berms, decks, spill containment pallets, etc.) and must be covered where appropriate. ✓ All vehicles on site must be monitored for leaks and receive regular preventive maintenance to reduce the chance of leakage. C•] �K•P► 6'i I :i 1 L•� i [•P► � � :Z•] •11 L•� L^� tfi /Lr ii � :7/�1 �c�_1 � I •lUf /�F.� ii � ✓ Storage of construction products, materials, and waste is to be conducted in dedicated areas. ✓ The dedicated area must be located to maximize the distance from storm drain inlets, ditches, waterbodies or wetlands but no less than 50 feet from those features. Separations of less than 50 feet may be approved by the Environmental Inspector. ✓ The dedicated areas must be designed to minimize the discharge of pollutants from storage, handling, and disposal of construction products, materials and wastes including (i) building products such as asphalt sealants, copper flashing, roofing materials, adhesives, concrete admixtures; (ii) pesticides, herbicides, insecticides, fertilizers, and landscape materials; and (iii) construction and domestic wastes such as packaging materials, scrap construction materials, masonry products, timber, pipe and electrical cuttings, plastics, Styrofoam, concrete and other trash or building products.. ✓ Each facility must have appropriate signage to inform users where the dedicated area(s) are located. Date Shown on Plan Sheet s Location(s) of Dedicated Area(s) for storage of construction products and materials Approved Plan C-602 West side of the site near construction entrance. REVISIONS TO LOCATIONS Date Shown on Plan Sheet S Location(s) of Dedicated Areas) for storage of construction products and materials Operator(s) Initials Shown on Location(s) of Dedicated Area(s) for waste from Date Plan Sheet construction products and materials #s Approved C3.1 WEST CORNER OF SITE Plan REVISIONS TO LOCATIONS Shown on Location(s) of Dedicated Areas) for waste Operator(s) Date Plan Sheet from construction products and materials Initials #s ✓ Follow all federal, state, and local requirements that apply to the use, handling and disposal of pesticides, herbicides, and fertilizers. ✓ Keep chemicals on -site in small quantities and in closed, well marked containers. ✓ Clean up solid waste, including building materials, garbage, and debris on a daily basis and deposit into covered dumpsters that are periodically emptied. ✓ Schedule waste collection to prevent exceeding the capacity of onsite containers. Additional containers may be necessary depending on the phase of construction (e.g., demolition, etc.) ✓ Dispose of all solid waste at an authorized disposal site. ✓ Ensure that containers have lids or are otherwise protected from exposure to precipitation. DISCHARGES FROM OTHER POTENTIAL POLLUTANT SOURCES ✓ Discharges from other pollutant sources (e.g., water line flushing, storm sewer flushing, above ground storage tanks, etc.) not mentioned elsewhere must be addressed. ✓ Above ground oil storage tanks with a storage capacity exceeding 1,320 gallons and have a reasonable expectation of a discharge into or upon Waters of the United States are required to have a Spill Prevention Control and Countermeasure (SPCC) Plan. ✓ The discharge of contaminated flush water and material removed during flushing operations must be collected and disposed of in accordance with appropriate federal, state, and local requirements. DISCHARGES FROM CONCRETE RELATED WASH ACTIVITIES Concrete trucks are not allowed to wash out or surplus discharge concrete or drum wash water on site except in a dedicated area(s) that is located to prevent discharge to storm drain inlets, ditches, waterbodies or wetlands but no less than 50 feet from those features. Each facilitymust have a stabilized access to revert mud tracking into the street. P 9 ✓ Each facility must have appropriate signage to inform users where the dedicated area(s) are located. Shown on Date Plan Location of Dedicated Area(s) Sheet # s Approved Plan C-602 West side of the site near construction entrance. REVISIONS TO LOCATIONS Shown on Operators Date Plan Location of DedicatedArea(s) Initials Sheet # s ✓ Facilities must be cleaned, or new facilities constructed, once the washout area is two-thirds (2/3) full. t 1:):1W01'1W;7-,l*1=We]ZA;ia147MT—9:Cfl111 0CD CD 0 0 CD O O O 10' MIN. 10' MIN. ^ A O O 0 CD 0 18' MIN. 1e, MIN. 3' MIN. _? 10'MIN. SECTION A ABOVE GRADE CONCRETE WASHOUT AREA STAPLE DETAIL 4" Xs' dia. steel wire 2" bale or metal stakes (2 aw bale) DISCHARGES OF SOAPS, DETERGENTS, SOLVENTS, AND WASH WATER FROM CONSTRUCTION ACTIVITIES SUCH AS CLEANUP OF STUCCO, PAINT, FORM RELEASE OILS, AND CURING COMPOUNDS ✓ Washing activities associated with construction activities other than vehicle and equipment washing, such as clean up of stucco, paint, form release oils, and curing compounds are to be conducted in a dedicated area. ✓ The dedicated area must be located to maximize the distance from storm drain inlets, ditches, waterbodies or wetlands but no less than 50 feet from those features. Separations of less than 50 feet may be approved by the Environmental Inspector. ✓ The dedicated areas must be designed to prevent the discharge of soaps, detergents, solvents, and wash water. Shown on Date Plan Location(s) of Dedicated Area(s) Sheet # s Approved Plan C-602 West side of the site near construction entrance. REVISIONS TO LOCATIONS Shown on Date Plan Location(s) of Dedicated Area(s) Operator(s) Sheet # s Initials) ✓ The dedicated area must be covered (e.g., plastic sheeting, temporary roof, etc.) to prevent contact with stormwater. ✓ The contaminated wastewater from the dedicated area must be collected for disposal by a waste hauler or discharged to the sanitary sewer. ✓ In situations where these pollutants are or could be generated at locations other than at the designated area (e.g.. concrete pours, building washing, etc.), cover (e.g., plastic sheeting, temporary roof, etc.) must be provided to prevent contact with stormwater and the contaminated wastewater from the activity must be collected for disposal by a waste hauler or discharged to the sanitary sewer. DISCHARGES OF HAZARDOUS, TOXI AND SANITARY WASTE ✓ Storage and disposal of hazardous, toxic and sanitary wastes are to be conducted in dedicated areas. ✓ The dedicated areas must be located to maximize the distance from storm drain inlets, ditches, waterbodies or wetlands but no less than 50 feet from those features. Separations of less than 50 feet may be approved by the Environmental Inspector. ✓ The dedicated areas must be designed to prevent the discharge of hazardous, toxic and sanitary waste by avoiding contact with precipitation ✓ Each facility must have appropriate signage to inform users where the dedicated areas are located. Shown on Location(s) of Dedicated Areas) for storage and disposal of Date Plan hazardous and toxic wastes Sheet # s Approved C-602 West side of the site near construction entrance. Plan REVISIONS TO LOCATIONS Shown on Location(s) of Dedicated Area(s) for storage Operator(s) Date Plan and disposal of hazardous and toxic wastes Initials Sheet # s Date Shown on Plan Sheet # s Location(s) of Dedicated Areas) for portable toilets Approved Plan C-602 West side of the site near construction entrance. REVISIONS TO LOCATIONS Date Shown on Plan Sheet # s Locations) of Dedicated Area(s) for portable toilets Operators) Initials ✓ Consult with local waste management authorities or private firms about the requirements for disposing of hazardous materials and/or soils that may be contaminated with hazardous materials. ✓ Never remove the original product label from the container. Follow the manufacturers recommended method of disposal. ✓ Schedule periodic pumping of portable toilets and dispose of waste ✓ Dispose of all solid waste at an authorized disposal site. SECTION B SWPPP MODIFICATIONS AND REVISIONS The operator(s) shall ensure the SWPPP is modified and/or revised to reflect: ✓ Changes in qualified personnel; delegated authorities or other personnel required as a condition of the General Construction Permit; ✓ Changes in site conditions; 1' ✓ Changes in the design, construction, operation, or maintenance of the construction min. site that affect the potential for discharges of pollutants that are not addressed in the 71 normal implementation of the plan, and 3'MIN. "=r' ✓ Ineffective control measures identified during inspections or investigations =1-1 conducted by the operator's qualified personnel or local, state or federal officials. —I I Modifications/revisions to the SWPPP shall include additional or modified control SECTION C measures to address the identified deficiencies. CONCRETE WASHOUT AREA NOTES ✓ The facility must be lined with 10 mil plastic lining that is free from holes, tears, or other defects that might compromise the material's impermeability. ✓ The lining must be anchored with staples (2' spacing) or sandbags. ✓ Side slopes must be 1:1 (horizontal:vertical) or flatter. ✓ Stone access must be provided between the street and the concrete washout area. ✓ A "Concrete Washout" sign must be installed within 30 feet of the washout facility. The sign must be no smaller than 2' tall by 4' wide. If the necessary modifications/revisions require approval by the Administrator or DEQ, the modifications/revisions must be implemented no later than seven (7) calendar days following approval. If the necessary modifications/revisions do not require approval by the Administrator, the modifications/revisions must be implemented prior to the next anticipated storm event or as soon as practicable. SWPPP UPDATES The operator(s) shall update the SWPPP to include: A record of dates when 1 major grading activities occur, 2 construction activities 1 9 9 ) temporarily or permanently cease on a portion of the site, and 3) stabilization measures are initiated; ✓ Documentation of modifications and revisions to the SWPPP; Areas that have reached final stabilization where no further SWPPP or inspection requirements apply; ✓ All properties that are no longer under the legal control of the operator and the dates on which the operator no longer had legal control over each property; and ✓ The date, volume, and corrective/preventative actions implemented for any prohibited discharge. The operator(s) shall update the SWPPP no later than seven (7) days following any of the situations identified above. OPERATOR INSPECTIONS The operator(s) identified below shall provide for inspections of the permitted land - disturbing activities by the qualified personnel identified below. The inspections will be conducted (select one the following options): ❑ at least once every four (4) business days; or ❑ at least once every five (5) business days and no later than 24 hours following any measurable storm event. Where areas are in a stabilized condition or runoff is unlikely due to winter conditions, the inspection frequency may be reduced to once every 30 days while these conditions exist. Otherwise, the operator(s) shall resume the regular inspection frequency identified above. The operator(s) shall provide for inspections of the permitted land -disturbing activity to ensure implementation and continued maintenance of all requirements of the Stormwater Pollution Prevention Plan (Erosion and Sediment Control Plan, Stormwater Management Plan, Pollution Prevention Plan, TMDL requirements, etc.). Records of the required inspections must be maintained and included in the SWPPP binder. The qualified personnel are encouraged to use the Operator Inspection form provided in the SWPPP binder to document the required inspections. If inspections are conducted once every five (5) business days and no later than 24 hours following any measureable storm event, the location of the rain gauge used to determine the amount of rain must be included in the SWPPP and documented in the inspection report. ACKNOWLEDGEMENTS I certify under penalty of law that the qualified personnel identified below a. has been designated by the Operator to conduct inspections of the permitted site; b. is knowledgeable in the principles and practices of erosion and sediment control and stormwater management; C. possesses the skills to assess conditions at the permitted site for the Operators) that could impact stormwater quality and quantity; d. will assess the effectiveness of any erosion and sediment control measures or stormwater management facilities selected to control the stormwater discharges from the permitted site; and e. will conduct inspections in accordance with the frequency noted above in the OPERATOR INSPECTIONS section of this sheet. QUALIFIED PERSONNEL Name (print) ALEX MAYS Phone Additional information is located in Tab 6 of the SWPPP Binder. As the Operator(s) or Delegated Authority, Itwe understand that prior to initiating land disturbance, the potential pollutant sources, appropriate control measures, and all responsible parties (operator, qualified inspection personnel, contractors, etc.) required as a condition of the General Construction Permit (GCP) and the Stormwater Pollution Prevention Plan (SWPPP) must be identified. I also understand this information must be updated as necessary throughout all phases of construction until the GCP is terminated. Furthermore, I/we certify under penalty of law that I/we have read and understand all requirements of the SWPPP (erosion and sediment control plan, stormwater management plan, pollution prevention plan, TMDL provisions, administrative requirements, etc.) and GCP and that the information herein is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine or imprisonment for knowing violations. Itwe understand that I/we are ultimately responsible for compliance with all conditions and requirements of the SWPPP and GCP and for ensuring all contractors and subcontractors on the permitted site are aware of the conditions and requirements of the SWPPP and GCP. I/we shall comply with all conditions and requirements of the SWPPP and shall at all times properly operate and maintain all measures and control (and related appurtenances) which are installed or used to achieve compliance with the conditions of the GCP. Proper opration and maintenance also includes adequate funding and adequate staffing. I/we shall take all reasonable steps to minimize or prevent any discharge in violation of the SWPPP and/or GCP. Itwe understand that if it determined by the Department of Environmental Quality (DEQ) in consultation with the State Water Control Board at any time that stormwater discharges are causing, have reasonable potential to cause, or contribute to and excursion above any applicable water quality standard, the DEQ may, in consultation with the Administrator, take appropriate enforcement action and require: a. Modification of control measures to adequately address water quality concerns; b. Submission of valid and verifiable data and information that are representative of ambient conditions and indicate that the receiving water is attaining water quality standards; or C. Cessation of discharges of pollutants from construction activity and submit an individual permit application according to 4VAC25-870410. OPERATOR(S) / DELEGATED AUTHORITY Name(print) Signature Date ALEX MAYS Additional contact information can be found in the SWPPP Binder. Z C) Z W WNN 1..1� 0. Z C) J O^ CL. W MIJ O m z w w w U) w O ZZ) U z Z 20-0ix (9ZWWU) jw ZrCO1--Luofra Fwax wZ _J > Z U w u) O r=n Q Q z Q ZraMwzFi- 0ZOf< O Q J Of 0 U) w Z Z aQ > a < Ir U w I- U) REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS� • I Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION NL DOCUMENT UESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 10/7/2021 CAD I.D.: SDP-0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com TH R4%N YAUUER Lic. No. 0402056625 07/01 /2022 SHEET TITLE: POLLUTION PREVENTION PLAN SHEET NUMBER: C-619 REVISION 2 - 07/01/22 Section 5. Stormwater Management Plan (Provide a reduced 11x17 copy of the latest stormwater management plan. Do not reference only.) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County 44 _ ______ -- _____ -- _________ __________________ --- - ---- -- --- _ - - - - ------ ------ ------------------------- --- --- — __ ---- - -- sau - _ -- - ---------------------- ---------------- ------------------- --- -- ---- - —'=j o -- - - --- � — — — ---- ----- _ \�\ y / ST 1 ` � 0 - - IN AQ INI 1M©NdyEsYG/OF Y1R1 _ _ - QIO+O,O*d,10— �/� ANM D' I1A11T; D ,ELOPMENTJ \ \\\\ ; ; \If S\\IN VA�V♦,A A11A�I I , _ ♦ _ 1 ' \ \ IIII\\\1_ --- \\ — - 11 11 0 / o , N � N , N sc r 0 IN IN — IN IN IN IN I INN, - IN IN I IN I IN IN INN \ \` IN INN I \ ' IN IN IN \�:.. VOI IN \ RE �X ✓aUE r�LIff Ll� `�`;` 1 0 ';, t\ ;`; `\\` dm\110r�� ` \ ?`♦ fRESIfJ�I /I �aLy ; ♦.'\ `, \ 1 ' 0 IN N, IN\ IN 'IN `\\\\\` \\ 1\\````'I 111�'11'I\'I\I \ \\\1\\♦\)) \INN ` If IN,` ` '` ` STM If ♦ \\A\1\ `\\ `\ `I \`\ \`\\I', '''I 111'I I '11 'II '11 I '11 'II I♦ ` -�\♦``, '\ \\ \\ \ 1 \ 11, '11 '1 '1T'1 �I11 I 1 I I ' IN P01 3 \ �`\ \ \; \`I \\\ �\ \ \ \'I ''I'''I I'1 '1'I '11'''I I ' \� \\ \i\ T 1 \ \ \, 'lll IIII ', ', I\ 1, \``♦ , ` :: �� \``\'\I'I''I''I \`\` ` �� CN-12 `V1AA A IIII IIII,\'i A\I A III A �77__ _ v v =A A I (f✓.�fE3N-zfi -�-- - - - , v 1 IN -- DB'y6%�G 558/ I ;; \ ;3,IN :;�;♦�\a(N4 ---- '-;*5A/rAr/,`'.%Prri7 /PIAAIAFf�--IIAII /1y1iF11?PA1FA1TJ .� l '� % �` \;�:;`\`:`:��``�\\\`.k i� ---- ---\ nY�'j\\♦N`♦ IN �: \III `I ♦1 `,�\„ `'IN \ N. I \ :IN 1 \ \IN IN IN If I 1 ' LANDS M/2 %IIIII'' RANGES BREEDEN B/r'�'IOHy�Ab; AN lyrZ-WIZHOWARo ¢✓i�r �d;' FA('1✓L Y TRCFIT 1 � l W's I PG(71Q TMP. b46Q0 USE. '$'✓NG,LE'',FAA-NLY/RF$✓DEN71AL '1 II i I 1 1 1 i i IN If IN IN INN \IN IN IN If IN IN \ 1 1 1 I 1 ♦ INN I IN ♦`1 I I I I I I 1 I I I 1 1 I , I I 1 1 ♦`\ 1 I\ 1 1 , I, \ 1♦ I \ `I 1' 1 I I I I I I I I 1 \ 1 1 I I I l , I I - -_; ,, v v LLJC/C ✓ TE4KJY000 PF✓ASf � v v v vI I EF 5-0TN '11,2611VIN6. R - P, kNN_ ur Qr L ePn E \)" l FUSE. S/NeL �i?MQYRE5L064trlAL z W W W u z F u LUz wos �LDw Z w w N 5 u Z_yC0�01u ~w¢x w� E>zUwv)� U)� m Q Q (ZD< zU)2 W ZCL _FP c)zQQQ~C Z J O U) D_' u 0D 0 W Q �zu�o d J OU W H REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what§ below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V 192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 101712021 CAD I.D.: HDP- 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA 22911 ALBEMARLE COUNTY, VA LEGEND B O H L E R I POI STORMWATER POINT OF INTEREST 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA 23236 Phone: (804)893-8200 EXISTING IMPERVIOUS AREA VA@BohlerEng.com 4.04 AC (21.5%) TH pA. EXISTING PERVIOUS AREA Z 14.74 AC (78.5%) V N YA R a .0 I-C. No. 0402056625 07/01/2022 SHEET TITLE: PRE DEVELOPMENT DRAINAGE AREA MAP SHEET NUMBER: 60 30 15 0 60 C 901 1"= 60' REVISION 2 - 07/01/22 0 r ,IN N N O O NN �.. / - �''__ =; ✓ c Ro OF \I 1 p o� 069 OTM 45 --,,; - ------- '�" RPM PSpp'P� Ot RSp \ � p S r1-10 , - --- -- _ 100 -- I�O V 1' 0 46 - as 3 \ _ _� o� is i 486 \\ --- -- F ____ _____ ______ _ __ STA/ 4a9 � •O \ - A 96 ❑ _ - - , - /i \ -__-___ ---- _----_ _ -_ _ , e __ ,, '-. ' STM \ `/ ` \ \ -- - - ;ice �, /\ / o STM _--------- ____ - - - _ - _ - STM -- - - - � to v� A 80 -- - - - \ / � 9 P014 STM rt/ cE BUILDING TO" INLET O� \' FFE = 490.25 AREA=0.51 _/. LOD� , , CN 83 J A-70 / ;A '� �� ,V ♦ STM ` r / MM 8 � T BUILDING 490.25 /r , / 1 n i ,o CO!--- N*E4iGH 1 Of G'.• i66 i '<j� _ ------- P�O� \ a' 4 /'� , STM p 8 ////`` -� / - a- l i ' I I ��_ .... ; _ J .,� /. / n O' '% A-61 Tir1P.iO4BB 0, d0 D,O '- PLAN ED/ l.,INIT'D ,ELOPMENT � ��- �I, USf V46AN7, 00" �1�11 -__ -_-_-_-_ \ _ _ \ \ r \`\;, �; \'� `� `\ \ ;; \ ``; �'; ;`��b✓a M7R�x,'✓avEsr��L'Ll� �\�o ;`•\\;` ;�`� � �\��;�,�`�`,d�)10/y'�`�'`�✓�>",fRESlTJ�II��1LJ' � \\ %/' , Nnoi ❑ I' "1 I' / 1 i '\ `\\` 1\ 1\ \ ` 1 I `I\\ \ ` `II 11 \ `I /,�' I' `\`\ ``\\ \\\1 \ \'1 \\\ 1'`, 1`I P01 3 STM 470 4B5 CC -1 ❑ 1 III 1 I 1 1 1 A 1 \I'I''I i t I' 1 i'1i��1 \I'llll'',I�', `\ � t` VAAA A A A 11 'II1111A1 , A 'lll'I'1'I'1\\'\1 STM\ul A-23 .\` `\�\\\\`\ \` \\ `, IIII, `I \I 111\1 '\'�\�`, 1 \ \ \ \1 22 9 \ krmsmw \� �\ ,,\\\`\\\,\-___ `� )/ -- _ , IIZI.,, , \\\, \\\ I I I I ____ _ _-- _ - \\, i - - _. / 489 \ BUILLDI`NNG1 1�\\\\ r;,' FFE 48Z50 --------------- ----------------- BUILDING2 /4117= FFE=487.50 Ili STM I-- I � , To VAULT 1 I AREA 1051 AC 481 JJ -�' 485 _ Q�, �: Hun �" ;p - LANDS N/� O �r Vim, r 1 484 °� �RAN'CES BREEOEN B` �OH Ab; l AN i '1 \ `, i\ y _ 1 < STM $TM , ♦. $ 1 \ STM `` '`\ \ `, ` /i ,,I ) /1 1\ r ,)1 1' , ', `, `1IIYI,1I,I�IIIrI'III i^ II'I'i�l\\'lp,\ �\\� �„``,,A `,\�v`\\ ,\QO II 1 !i a4ST5M _-__o ❑v � - n,j - -hh 1��.. 0.1� pc0 -�AC -20 . ... C -21 / i / �r ',_'4824ay , - 4�8Z ' " ✓ML%��,. ��,4'6HQOI 01 YAII R0i I 9�rI /D�'�j L7BE�1✓ b0rI ✓I AiI / ST 482 A(VIZY rR( 4�%�?p481 111l1l14,`\\ \T 0 STM ZONING t? 1-5-5, py Z P01 2 STM STM US Al STM I L I I ` o TO VAULT 2- ' o M r AREA =4.55 --Iili`�``v� `�v` �' A CN=83 8 o. 481 Al �� i I I I I I I ,I83.17 FIFE48 FFE 4867FFE = 4FFE = 481.00 _ _ GFE_482 50 0 GFE_480 33GFE=478.00 ..100GFE=48200 GFE=47900 GFE it FFE=478.00 FFE=482.00 FFE =482.50 FFE=478.33 FFE GFE=47733 GFE=481.83 GFE=479.67 GFE=478.33 FFE8 GFE=481.33 =8000 PO (GFE433 I1 ` I. i"i\\``,' 1 O FFE=481.83 FIFE FE=47967 .' ' 1 FFE=477.33 N FFE=481.33 O FFE=478.33 FFE=478.33 = ' I 1'1Ii„I, FE = 481.17 GFE = 479.00480.67UNDETAINED GFE = 476.67 GFE=477.67 i, AREA =0.8 CN FE=481.17 FE=479.007480.67 , FFE=477.67 f FIFE =479.67 GFE=476.00 , GFE=480.50 GFE-47833 ' '. ' GFE = 480.00 GFE = 477.00'r FIFE =476.00 ( FFE = 480.00 FIFE FFE =478.33 6 4 .� - FFE = 477 00 , 'GFE=47767 79..00 '1 `\', 79.33 = GFE=475.33 GFE=4FFE=4 I 1,11 ,1 111 ,1 11 In', I I'II', IIIII 1, II ( II n, FFE=479.83 O FFE -47700 / i FFE =476.33 'O FFE=478.33 111 1' „ Y, I _ ,II, O FFE=475.33 M FFE=47933 GFE=479.17 GFE=477.00 GFE=475.67 GFE=477.67 I I , 1 , GFE=474.67 STM GFE=47867 I ' I FFE-474.67 FFE=47867 ' FFE =479.17 FFE =477.00 FFE=475.67 FIFE I I` GFE=474.00 • '`GFE=478.00 GFE=47&50 - 1 GFE 476.33 S = i g�6 GFE=477.00 _ _ _ O STM STM STM P> _ GFE 475 00 1 I ''' 111'Iy,l 11„ iill ,.� I IIi ST D-10 - D-20 D30xlI I POI STM STM I �$TM i ci 1 `\,-00 4 STM \ STM -10 \ I, ,� i o . � q �� UNDETAINED I I I°� I ( POI AREA =0.87 \ STM ` 1, i M �O 473 _- -� 480 �477 474 47 CN=62 i X_F \� 0 GG-\ GD/� 475 480 - 482 480 470 _ _ STM 72 STM f_ 4I0 1 480 468 -- --- - r 5 I� 4 �'i ` _ V 465 u yr, I'II ii 1 ��t 484 SLOD LO'YI 447 48 6 J P012''''I'I - - o . L LOT 17 _- � _-�: _�� '____ IIII •',�� ,\,\ ,,,` ,ILl7C/C✓- Sf TE4KJY000`BF/A�'" �` - N© Gi✓.f6N zfiRfA _�'aa }_ , \ ,\, , , \ ;>� " TwN✓✓07��';:`: '`,� '/= '------- , _• IIIII �� ' , _-----' 'ZAf�F�"' Sl1UFf% / I' 'I 'I ' ; � ��; �❑;:� �, `:`,�'\\ `, '' �:' . , \\ \ `\ `\ ,\ `, �, OB'�1Szl� P� :y'9s r. ----- ' / ' _-' "" __-_ I ` \ 1c� /N�; (%1T.�RLQ FJN/fll��(ENr% \ 2YJN/NL' R✓/{}_ LAN_ UNIT PYECORA�E �y'46% AG: .Tu'f ` -' / \ "�n`•.///7 /P/AA/A/F�� Y1PA/FA/T) FUSE.• S✓NCtE�ibbfQYRESQ,jT64(rIAL LEGEND STORMWATER POINT OF INTEREST �/ PROPOSED IMPERVIOUS AREA 12.52 AC (66.7%) STORMWATER POINT OF INTEREST PROPOSED PERVIOUS AREA 6.26 AC (33.3%) PROPOSED UNDERGROUND STORMWATER VAULT • CDS HYDRODYNAMIC SEPARATOR 60 30 15 0 60 1 "= 60' k � \ S M Z =_ W Z W cn o F � W U p- Z W H w> o W Z W U W U o W Z W w W Z _ > W W Z}U' -00'U o= ~w<x wz =z J>z0w cn0 =� co2< ZQ aW OQ <a�~W(D m ZU n- pS < �2 Z a- p& az 0- < s� < - J H op LU bo O ys REVISIONS REV DATE COMMENT DUNI CHECM 1 05/18/22 COUNTY COMMENTS PCI RT 2 07/01/22 COUNTY COMMENETS PCI Know what§ below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V 192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 101712021 CAD I.D.: - 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA 22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA 23236 Phone: (804)893-8200 VA@BohlerEng.com _.aALTH il- Lic. No. 0402056625 6, 07/01/2022 j SHEET TITLE: POST DEVELOPMENT DRAINAGE AREA MAP SHEET NUMBER C-902 oo� REVISION 2 - 07/01/22 DEQ Virginia Runoff Reduction Method Re -Development Compliance Spreadsheet - Version 3.0 BMP Design Specifications List: 2011 Stds & Specs Site Summary Project Title: RST Development Date: 44248 Total Rainfall (in): 43 Total Disturbed Acreage: 18.78 Site Land Cover Summary Pre -Re Development Land Cover (acres) A soils BSoils CSoils DSoils Totals %af Total Forest/Open (acres) 0.00 7.06 0.00 0.00 7.06 38 Managed Turf (acres) 0.00 7.68 0.00 0.00 7.68 41 Impervious Cover (acres) 0.00 4.04 0.00 0.00 4.04 22 18.78 100 Post-ReDevelopment Land Cover (acres) A soils BSoils CSoils DSoils Totals %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf (acres) 0.00 6.26 0.00 0.00 6.26 33 Impervious Cover (acres) 0.00 12.52 0.00 0.00 12,52 67 18,78 100 Site Tv and Land Cover Nutrient Loads Final Post -Development post- Port - Adjusted Pre- (Post-ReDevelopment ReDevelopment Development ReDevelopment e & New Impervious) (New Impervious) Site Rv 0.70 0.49 0.95 0.49 Treatment Volume (ft3) 47,720 18,477 29,243 18,477 TP Load (Ib/yr) 29.98 11.61 18.37 11.61 Total TP Load Reduction Required (lb/yr) 17.22 2.32 14.90 Final Post -Development Load (Post-ReDevelopment & New Impervious) Pre- ReDevelopment TN Load (lb/yr) 214.49 91.14 VRRM REDEVELOPMENT CALCULATIONS Pre - ReDevelopment Final Post -Development Post-ReDevelopment TP TP Load per acre TP Load per acre Load per acre (lb/acre/yr) (lb/acre/yr) (lb/acre/yr) 1.13 1.60 1.13 10 YEAR EX STORM COMPUTATIONS (EXISTING CONDITION) Drainage Area A Summary Land Cover Summary Site Compliance Summary Maximum % Reduction Required Below 20% Pre-ReDevelopment Load Total Runoff Volume Reduction (ft 3) 0 Total TP Load Reduction Achieved (I b/yr) 12.92 Total TN Load Reduction Achieved (lb/yr) 0.00 Remaining Post Development TP Load (lb/yr) 17.06 Remaining TP Load Reduction (lb/yr) Required 4.30 ASoils BSoils CSoils DSoils Total %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf (acres) 0.00 2.81 0.00 0.00 2.81 20 Impervious Cover (acres) 0.00 11.39 0.00 0.00 1 11.39 80 14.20 BMP Selections Managed Turf Impervious BMP Treatment TP Load from Untreated TP Load TP Removed TP Remaining Downstream Treatment Practice Credit Area Cover Credit Volume (ft) Upstream to Practice (Ibs) (Ib/yr) (lb/yr) to be Employed (acres) Area (acres) Practices (Ibs) 14.a. Manufactured Treatment Device- 1.86 9.61 34,490.45 0.00 21.65 4.33 17.32 14.1a. MTD - Filtering Hydrodynamic 14.b. Manufactured Treatment Device- Filtering 0.9 1.75 41,178.72 17.32 4.20 8.61 12.91 Total Impervious Cover Treated(acres) 11.39 Total Turf Area Treated (acres) 2.81 Total TP Load Reduction Achieved in D.A. 12.92 (lb/yr) Total TN Load Reduction Achieved in D.A. (lb/yr) 0.00 From Point To Point Drain. Area (acres) Runoff Coeff. C CA Inlet Time (min) Rainfall Intensity (in/hr) Q Invert Elev. Length (ft) Slope ( %) Dia. (in) in Capacity (cfs) Velocity (fps) Flow Time Q / Qfull V / Vfull Vfull Remarks rev6/24 Incr. F Incr. (cfs) Known (cfs) F (cfs) Upper (ft) Lower (ft) Incr. (min) i (min) 4.30 - 4.30 458.12 455.37 81.00 3.40% 18 EX-F1 EX-F2 1.62 0.40 0.65 0.65 5.00 6.62 0.013 19.41 8.52 0.16 5.16 0.22 0.78 10.98 EX-F2 EX-F3 1.30 0.55 0.72 1.37 5.16 6.58 4.74 - 9.02 455.27 448.87 95.00 6.74% 18 0.013 27.34 13.60 0.12 5.28 0.33 0.88 15.47 H-10 EX-H1 0.92 0.50 0.46 0.46 5.00 6.62 3.05 - 3.05 477.61 473.80 215.00 1.77% 15 0.013 8.62 6.34 0.57 5.57 0.35 0.90 7.03 1-10 EX-11 0.97 0.48 0.47 0.47 5.00 6.62 3.11 - 3.11 476.00 475.46 37.50 1.44% 15 0.013 7.77 5.98 0.10 5.10 0.40 0.94 6.33 EX-J1 EX-J2 0.13 0.80 0.10 0.10 5.00 6.62 0.66 - 0.66 476.74 469.28 300.00 2.49% 15 0.013 10.21 4.48 1.12 6.12 0.06 0.54 8.32 EX-J2 EX-J3 0.34 0.80 0.27 0.37 6.12 6.32 1.71 - 2.34 469.23 459.30 292.00 3.40% 15 0.013 11.94 7.27 0.67 6.79 0.20 0.75 9.73 EX-J3 EX-J4 0.35 0.85 0.30 0.67 6.79 6.15 i 1.84 - i 4.11 457.66 453.40 266.00 1.60% 15 0.013 8.20 6.68 10.66 7.45 0.50 i 1.00 6.68 10 YEAR STORM COMPUTATIONS (PROPOSED CONDITION) From Point To Point Drain. Area (acres) Runoff Coeff. C CA Inlet Time (min) Rainfall Intensity (in/hr) Q Invert Elev. Length (ft) Slope ( % ) Dia. (in) n Capacity (cfs) Velocity (fps) Flow Time Q / Qfull V / Vfull Vfull Remarks rev6/29 Incr. F Incr. (cfs) Known (cfs) F (cfs) Upper (ft) Lower (ft) Incr. (min) f (min) UG-F EX-F1 - - - - - - - 16.03 16.03 459.50 458.22 35.59 3.60% 18 0.013 19.97 12.48 0.05 5.05 0.80 1.10 11.30 EX-F1 EX-F2 0.56 0.35 0.20 0.20 5.05 6.61 1.32 - 17.35 458.12 455.37 81.00 3.40% 18 0.013 19.41 12.37 0.11 5.16 0.89 1.13 10.98 EX-F2 F-20 1.16 0.50 0.58 0.78 5.16 6.58 3.82 - 21.17 455.27 454.03 20.00 6.20% 18 0.013 26.23 16.50 0.02 5.18 0.81 1.11 14.84 F-20 EX-F3 0.15 0.90 0.14 0.92 5.18 6.57 0.92 - 22.08 453.93 448.87 75.00 6.75% 18 0.013 27.36 17.22 0.07 5.25 0.81 1.11 15.48 H-10 EX-H1 0.90 0.60 0.54 0.54 5.00 6.62 3.57 - 3.57 475.10 473.80 73.50 1.77% 15 0.013 8.61 6.63 0.18 5.18 0.41 0.94 7.02 1-10 EX-11 0.97 0.52 0.50 0.50 5.00 6.62 3.31 - 3.31 475.81 475.46 24.00 1.46% 15 0.013 7.82 6.02 0.07 5.07 0.42 0.94 6.37 EX-J1 EX-J2 0.13 0.80 0.10 0.10 5.00 6.62 0.66 - 0.66 476.74 469.28 300.00 2.49% 15 0.013 10.21 4.48 1.12 6.12 0.06 0.54 8.32 EX-J2 EX-J3 0.34 0.82 0.28 0.38 6.12 6.32 1.77 - 2.40 469.23 459.30 292.00 3.40% 15 0.013 11.94 7.55 0.64 6.76 0.20 0.78 9.73 EX-J3 EX-J4 0.35 0.85 0.30 0.68 6.76 6.16 1.85 - 4.19 457.66 453.40 266.00 1.60% 15 0.013 8.20 6.68 0.66 7.42 0.51 1.00 6.68 EX-K1 EX -K2 0.30 0.30 0.09 0.09 5.00 6.62 0.60 - 0.60 460.18 460.00 15.00 1..20% 18 0.013 11.54 323 0.08 5.08 0.05 0.50 6.53 2 YEAR INLET COMPUTATIONS (EXISTING CONDITION) NUTRIENT CREDIT AVAILABILITY LETTER Riranna hirer Nutrient Bank October 6, 2021 Bohler Engineering Attention Pilar Moore, Senior Design Engineer Certificate No..lames-039 Project: RST Development Location: Albemarle County at the intersection of Seminole Trail and Ashwood Boulevard HUC8: 02080204 Credits required: 4.3 Price per LB of Phosphorous: $13,500.00 Dear Pilar, This letter is to confirm the availability to your project (referenced above) of authorized Nutrient Credits sufficient to meet your above referenced estimated requirements of Nutrient Credits at our Rivanna River nutrient offset credit bank facility (the "Bank"). The Bank has been registered with the Virginia Department of Environmental Quality (DEQ). These Nutrient Credits are generated and managed under the terms of the Reduction Implementation Plan for the Bank dated November 2017, which was authorized by (DEQ) on September 5, 2018. The Bank has been authorized to provide Nutrient Credits for use in the James River watershed. These credits are transferable to those entities regulated under DEQ's Storm Water Management program in accordance with VA Code 62.144.15:27. if we can provide 1'urthe istance please feel free to contact our office. Hotel Street Capi , LC, Bank Sponsor By [ISM '1 ,Igraes ss H Nutrient Offset Trading Bank, 31 Garrett Street, Warrenton, Virginia 20186 STORMWATER NARRATIVE THE EXISTING SITE CONSISTS OF 2 PARCELS WITH A COMBINED AREA OF 19.51 ACRES. THE SITE HAS ABOUT 4.05 ACRES OF IMPERVIOUS AREA WITH SEVERAL TRAILERS AND GRAVEL LOTS SURROUNDED BY DEVELOPED GRASSED AREA. THE REMAINDER OF THE SITE CONSIST OF MOSTLY WOODED AREAS. EXISTING GRADES ON SITE ARE MOSTLY BETWEEN 1 % AND 50 %WITH SEVERAL AREAS OF PRESERVED STEEP SLOPES AS INDICATED ON THE PLANS. PART OF THE SITE DRAINS TO A SWALE RUNNING FROM NORTH TO SOUTH WITHIN THE PROPERTY LINE AND OUTFALLS TO POI 1 AT THE SOUTHERN PROPERTY LINE. THE WEST SIDE OF THE SITE DRAINS TO AN EXISTING INLET NEAR THE RIGHT OF WAY AND OUTFALLS ON THE OTHER SIDE OF ASHWOOD BOULEVARD AT POI 2. THE REMAINDER OF THE SITE MOSTLY SHEET FLOWS TO POI 3 ON THE EAST PROPERTY LINE. AREAS ALONG SEMINOLE ROAD ROUTE 29 WITHIN THE LOD CURRENTLY ARE CURBED AND DRAIN TO EXISTING INLETS ALONG ROUTE 29. PROPOSEDIMPROVEMENTS THE PURPOSE OF THIS PROJECT IS CONSTRUCT 4 APARTMENT BUILDINGS, 6 STRIPS OF TOWNHOMES, AMENITY AREAS, ASSOCIATED PARKING AND UTILITY IMPROVEMENTS, AS WELL AS AN ON -SITE UNDERGROUND DETENTION SYSTEM. THE TOTAL DISTURBED AREA FOR THE CONSTRUCTION ACTIVITY IS ANTICIPATED TO BE APPROXIMATELY 18.78 ACRES. THERE WILL BE APPROXIMATELY 12.52 ACRES OF IMPERVIOUS AREA. STORMWATER NARRATIVE WATER QUALITY REQUIREMENTS FOR THIS SITE WILL BE MET THROUGH THE USE OF THE STORMTECH ISOLATOR ROW UNDERGROUND DETENTION SYSTEM (APPROVED BY DEQ FOR 40% TP REMOVAL EFFICIENCY), CONTECH CDs HYDRODYNAMIC SEPARATOR (APPROVED BY DEQ FOR 20% TP REMOVAL EFFICIENCY), AND BY PURCHASING 4.3 POUNDS OF NUTRIENT CREDITS TO ENSURE THERE IS NO DEGRADATION TO THE STORMWATER QUALITY CAUSED BY THE DEVELOPMENT OF THIS SITE. WATER QUANTITY REQUIREMENTS WILL BE MET THROUGH THE USE OF THE ON -SITE UNDERGROUND DETENTION SYSTEM. THE SYSTEM WILL USE A WEIR OUTFALL STRUCTURE WITH A LOW -FLOW ORIFICE TO ATTENUATE THE POST DEVELOPMENT FLOWS TO MEET THE CHANNEL AND FLOOD PROTECTION REQUIREMENTS. THE PRE AND POST -DEVELOPMENT FLOW RATES FOR THE 1-YEAR, 2-YEAR, AND 10-YEAR STORM EVENTS FOR THIS SITE WERE CALCULATED USING THE SCS TR-55 METHOD IN THE PROGRAM AUTOCAD HYDRAFLOW HYDROGRAPHS, AS SHOWN ON SHEETS C-904 - C-906. THE CURVE NUMBERS USED IN THESE CALCULATIONS WERE CALCULATED USING THE VALUES FROM THE NRCS TR-55 TECHNICAL MANUAL, TABLE 2.2A, "RUNOFF CURVE NUMBERS FOR URBAN AREAS". RAINFALL DEPTHS USED TO CALCULATE FLOWS WERE FROM NOAA ATLAS-14 DATA FOR THE PROJECT SITE. PRE -DEVELOPMENT FLOWS: POI 1 POI 2 POI 3 1-YEAR 8.80 CFS 7.32 CFS 7.31 CFS 2-YEAR 13.45 CFS 11.31 CFS 11.13 CFS 10-YEAR 29.12 CFS 24.90 CFS 23.99 CFS POST -DEVELOPMENT FLOWS: POI 1 POI 2 POI 3 1-YEAR 1.65 CFS 3.79 CFS 2.43 CFS 2-YEAR 3.00 CFS 5.89 CFS 3.84 CFS 10-YEAR 28.93 CFS 19.48 CFS 8.69 CFS AS SHOWN, THE RUNOFF FROM THE 10-YEAR STORM EVENT HAS BEEN REDUCED IN THE POST -DEVELOPMENT CONDITION TO LEVELS BELOW THE PRE -DEVELOPMENT CONDITION; THEREFORE MEETING THE FLOOD PROTECTION REQUIREMENT UNDER 9VAC 25-870-66.C2.B. AS SHOWN ON THE ENERGY BALANCE CALCULATIONS ON THIS SHEET, THE REDUCTION IN THE POST -DEVELOPMENT FLOWS IS SUFFICIENT TO SATISFY THE ENERGY BALANCE EQUATION; THEREFORE MEETING THE CHANNEL PROTECTION REQUIREMENT UNDER 9VAC 25-870-66.B.1.B. DRAINAGE FROM THE OFFSITE IMPROVEMENTS ON ROUTE 29 SHEET FLOW TO EXISTING INLETS. INLET CALCULATIONS WERE PERFORMED ON BOTH INLETS FOR PREDEVELOPMENT AND POST DEVELOPMENT CONDITIONS AND IT WAS DETERMINED THAT NO MAJOR IMPACTS TO THE EXISTING SYSTEM WOULD BE CAUSED BY THE SLIGHT INCREASED IMPERVIOUS AREA. BOTH CHANNEL PROTECTION AND FLOOD PROTECTION REQUIREMENTS ARE MET FOR POI 4 UNDER SUBSECTION D OF REGULATION 9VAC25-870-66. BEST MANAGEMENT PRACTICES NARRATIVE SINCE THE SUBJECT SITE IS AN EXISTING DEVELOPED SITE, WATER QUALITY REQUIREMENTS FOR THE DEVELOPMENT OF THIS SITE WERE CALCULATED USING THE VIRGINIA RUNOFF REDUCTION METHOD (VRRM) REDEVELOPMENT SPREADSHEET. USING THIS SPREADSHEET IT WAS DETERMINED THAT THE DEVELOPMENT OF THIS SITE WOULD REQUIRE THE TREATMENT OF A TOTAL OF 17.22 LB/YEAR OF PHOSPHORUS REMOVAL. THE REMOVAL REQUIREMENT WILL BE MET THROUGH THE STORMTECH ISOLATOR ROW FILTRATION SYSTEM, CONTECH CDS HYDRODYNAMIC SEPARATORS, AND THE PURCHASE OF NUTRIENT CREDITS FOR THE REMAINING 25% OF THE REQUIREMENT. A NUTRIENT CREDIT AVAILABILITY LETTER HAS BEEN PROVIDED ON THIS SHEET, SHOWING MORE NUTRIENT OFFSET CREDITS ARE AVAILABLE TO BE PURCHASED WITHIN THE WATERSHED THAN ARE REQUIRED. SINCE THE PHOSPHORUS REMOVAL ACHIEVED BY THESE MEASURES MEETS THE AMOUNT REQUIRED BY THE VRRM REDEVELOPMENT SPREADSHEET, ALL STORMWATER QUALITY REQUIREMENTS FOR THIS PROJECT HAVE BEEN MET AND NO FURTHER ANALYSIS IS REQUIRED. CONCLUSION 0 Z EE W W LLl U) Z F W W Z W H W Ix (DZW W V)W Z>- (DHQof FWQ= WZ >Z0Wwo to 7 2 Q Q Z Q Z (nM W ZFp 0Zof< O Q J OO D W Z z aQ > a < Ir (J W H to REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS� io Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 SINCE THE 1-YEAR FLOW RATE IN THE POST DEVELOPED CONDITION MEETS ENERGY BALANCE REQUIREMENTS; AND THE 10-YEAR DRAWN BY: MEG / PM FLOW RATE IN POST DEVELOPED CONDITION IS LOWER THAN THE EXISTING FLOW RATE; AND THE PHOSPHORUS REMOVAL RATE CHECKED BY: RTY MEETS THE VRRM REDEVELOPMENT PHOSPHORUS REMOVAL REQUIREMENT; IT IS THE OPINION OF THE ENGINEER THAT DATE: 10/7/2021 STORMWATER QUANTITY AND QUALITY REQUIREMENTS ARE SATISFIED FOR THIS PROJECT. CAD I.D.: SWP-0 ADEQUATE OUTFALL NARRATIVE THE EXISTING SITE DRAINS INTO A STORMWATER CONVEYANCE SYSTEM VIA AN EXISTING SWALE (IDENTIFIED AS POI 1) TO THE SOUTH OF THE SITE. IN THE PROPOSED CONDITIONS, THE DISTURBED AREA IS ROUTED THROUGH THE ONSITE, UNDERGROUND DETENTION SYSTEM CONTROLLED BY A WEIR STRUCTURE. THE UNDERGROUND DETENTION OUTFALLS INTO A RIPRAP OUTLET PROTECTION TO POI 1 WITH NO INCREASE IN FLOW. THE EXISTING POI 2 DRAINAGE AREA DRAINS TO AN EXISTING 18" RCP PIPE VIA A GRATE INLET. IN THE PROPOSED CONDITIONS, THE DISTURBED AREA IS ROUTED THROUGH THE ONSITE, UNDERGROUND DETENTION SYSTEM CONTROLLED BY A WEIR STRUCTURE. THE UNDERGROUND DETENTION OUTFALLS INTO THE EXISTING 18" RCP SYSTEM WITH NO INCREASE IN FLOWS. THE EXISTING POI 3 DRAINAGE AREA SHEET FLOWS OFF THE SITE TO THE EAST PROPERTY LINE. IN THE PROPOSED CONDITION, THE AREA SIGNIFICANTLY DECREASE TO POI 3; THEREFORE, THERE IS NO INCREASE IN FLOW TO POI 3. BASED ON AN ANALYSIS OF THE EXISTING INLETS IN THE EXISTING AND PROPOSED CONDITION, IT WAS DETERMINED THAT THE DRAINAGE AREA TO P014 CAUSES NO MAJOR IMPACTS TO THE EXISTING SYSTEM. SINCE THE OVERALL FLOWS TO POI 1, 2, AND 3 FOR THE 1-YEAR AND 10-YEAR STORM EVENTS ARE REDUCED WITH THE DEVELOPMENT OF THIS SITE, AND THE ROAD IMPROVEMENTS DRAINAGE TO POI 4 CAUSES NO MAJOR IMPACTS TO THE EXISTING SYSTEM, THE OUTFALLS SHOULD BE CONSIDERED ADEQUATE. AS SUCH, IT IS THE OPINION OF THE ENGINEER THAT ADEQUATE OUTFALL REQUIREMENTS HAVE BEEN MET FOR THE SUBJECT SITE. Inlet DA C I Q Qb Qt S Sx In T W Sw On Grade Inlets Only Sag Inlets Only Remarks No. Type Length (ft) Drain Area (acres) Runoff Coeff- icient Inten -sity (in/hr) Incr. Flow (cfs) Carry -over Flow (cfs) Accum. Flow (cfs) Gutter Slope (%) Pvmt Cross Slope (%) Spread On Grade (ft) Gutter Width (11t) W / T Gutter Cross Slope (%) Sw / Sx Eo (App. 9C-8) a (in) S'w = a / (12W) (%) Se=Sx + S'w (Eo) (%) Lt,Comp. Length (9C-17) (ft) L,Spec -ified Length (ft) L I Lt E Qi Qb Down Qi d In (ft) d / h Ts rev6/24 Eff. (9C-18) InVx Flow (cfs) Byp. Flow (cfs) Stream Int'x Flow (cfs) Depth (ft) Spread In Sag (ft) Stir. H-10 Curb DI-3B 8.00 0.92 0.50 5.02 2.31 0.00 2.31 1.00 2.00 0.02 8.41 2.00 0.24 8.33 4.17 0.66 3.52 14.66 11.74 9.63 8.00 0.83 0.96 2.22 0.09 0.00 0.00 0.00 0.00 0.00 0.00 On Grade 1-10 Curb DI-3B 8.00 0.97 0.48 5.02 2.34 0.00 2.34 1.00 2.00 0.02 8.46 2.00 0.24 8.33 4.17 0.66 3.52 14.66 11.69 9.70 8.00 0.83 0.96 2.24 0.10 0.00 0.00 0.00 0.00 0.00 0.00 On Grade EX-J1 Ex. Curb DI-3B 8.00 0.13 0.80 5.02 0.52 0.00 0.52 1.00 2.00 0.02 3.07 2.00 0.65 8.33 4.17 0.99 3.52 14.66 16.48 4.21 8.00 1.90 1.00 0.52 0.00 0.00 0.00 0.00 0.00 0.00 0.00 On Grade EX-J2 Ex. Curb DI-3B 8.00 0.34 0.80 5.02 1.37 0.00 1.37 3.20 2.00 0.02 4.33 2.00 0.46 8.33 4.17 0.93 3.52 14.66 15.66 9.20 8.00 0.87 0.97 1.33 0.04 0.00 0.00 0.00 0.00 0.00 0.00 On Grade EX-J3 Ex. Curb DI-3B 8.00 0.35 0.85 5.02 1.49 0.00 1.49 4.00 2.00 0.02 4.26 2.00 0.47 8.33 4.17 0.94 3.52 14.66 15.72 10.19 8.00 0.78 0.94 1.40 0.09 0.00 0.00 0.00 0.00 0.00 0.00 On Grade 2 YEAR INLET COMPUTATIONS (PROPOSED CONDITION) Inlet DA C I Q Qb Qt S Sx n T W Sw On Grade Inlets Only Sag Inlets Only Remarks No. Type Length (ft) Drain Area (acres) Runoff Coeff- icient Inten -sity (in/hr) Incr. Flow (cfs) Carry -over Flow (cfs) Accum. Flow (cfs) Gutter Slope (%) Pvmt Cross Slope (%) Spread On Grade (ft) Gutter Width (ft) W / T Gutter Cross Slope (%) Sw I Sx Eo (App. 9C-8) a (in) S'w = a / (12W) (%) Se=Sx + S'w (Eo) (%) Lt,Comp. Length (9C-17) (ft) L,Spec -ified Length (ft) L I Lt E Qi Qb Down QJ d h (ft) d / h Ts rev6/29 Eff. (9C-18) Int'x Flow (cfs) Byp. Flow (cfs) Stream Inrx Flow (cfs) Depth (ft) Spread In Sag (ft) Str. H-10 Curb DI-3B 8.00 0.90 0.60 5.02 2.71 0.00 2.71 1.00 2.00 0.02 9.09 2.00 0.22 8.33 4.17 0.63 3.52 14.66 11.17 10.61 8.00 0.75 0.92 2.49 0.22 0.00 0.00 0.00 0.00 0.00 0.00 On Grade 1-10 Curb DI-3B 8.00 0.97 0.52 5.02 2.53 0.00 2.53 1.00 2.00 0.02 8.80 2.00 0.23 8.33 4.17 0.64 3.52 14.66 11.41 10.18 8.00 0.79 0.94 2.37 0.16 0.00 0.00 0.00 0.00 0.00 0.00 On Grade EX-J1 Ex. Curb DI-3B 8.00 0.13 0.80 5.02 0.52 0.00 0.52 1.00 2.00 0.02 3.07 2.00 0.65 8.33 4.17 0.99 3.52 14.66 16.48 4.21 8.00 1.90 1.00 0.52 0.00 0.00 0.00 0.00 0.00 0.00 0.00 On Grade EX-J2 Ex. Curb DI-3B 8.00 0.34 0.82 5.02 1.40 0.00 1.40 3.20 2.00 0.02 4.42 2.00 0.45 8.33 4.17 0.93 3.52 14.66 15.59 9.33 8.00 0.86 0.97 1.36 0.04 0.00 0.00 0.00 0.00 0.00 0.00 On Grade EX-J3 Ex. Curb DI-3B 8.00 0.35 0.85 5.02 1.49 0.00 1.49 4.00 2.00 0.02 4.26 2.00 0.47 8.33 4.17 0.94 3.52 14.66 15.72 10.19 8.00 0.78 0.94 1.40 0.09 0.00 0.00 0.00 0.00 0.00 0.00 On Grade F-20 Curb DI-3C 8.00 0.15 0.90 5.02 0.68 0.00 0.68 2.00 0.02 0.00 2.00 8.33 3.52 0.00 0.00 0.00 0.68 0.09 0.46 0.19 1.04 In Sag ENERGY BALANCE Site: RST Residences County: Albemarle Storm Event: 1 Year 24-Hour Rainfall Depth: 3.0" (PerNOAA Atlas 14) Point of Interest ID 1 1 2 1 3 1 Comments Pre -Development Q, Flow (cfs) 8.80 7.32 7.31 CN, Curve Number 71 73 72 RV, Runoff Depth (in) 0.76 0.86 0.81 RV per Tables 11-C-27,11-C- 30,11-G32, 11-C-38 Drainage Area, Ac 6.95 6.34 5.90 RV, Runoff Volume (Ac-In) 5.28 5.44 4.77 Post -Development Q, Flow (cfs) 1.65 3.79 2.43 I.F. 0.80 0.80 0.80 Improvement Factor CN, Curve Number 89 82 69 RV, Runoff Depth (in) 1.90 1.38 0.67 RV per Table 11 -C-27,1 1 -C- 36,11-C-37, 11-C-43 Area, Ac 11.44 5.53 2.22 RV, Runoff Volume 21.73 7.63 1.49 Energy Balance (EB) Q, Post-Dev (cfs) 1.65 1 3.79 2.43 I.F. ' Q pre ` RV pre 1.71 4.17 7.31 Q, Post-Dev Allowable (cfs) RV post EB Achieved Yes Yes Yes Notes: 1. Q Post-Dev must always be less than or equal to Q Pre-Dev 2. Q Post-Dev is not required to be less than that calculated in the equation (Cl forest x RV forest)/RV Post-Dev 3. I.F. = 0.8 for sites > 1.0 acre, 0.9 for sites <_ 1.0 acre 4. RV tables per VA SWM Handbook, CH 11, App 11-C PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com TH RVAN YAUUER Lic. No. 0402056625 07/01 /2022 SHEET TITLE: STORMWATER COMPLIANCE SHEET SHEET NUMBER: C-903 REVISION 2 - 07/01/22 Di Virginia Runoff Reduction Method Re -Development Compliance Spreadsheet - Version 3.0 L 2011 BMP Standards and Specifications 112013 Draft BMP Standards and Specifications Project Name: RST Development data )rap des h Date: 2/21/2021 canstaM values Ungar Development Project? No calculation cells Site Information Post -Development Project (Treatment Volume and Loads) Enter Total Disturbed Area (acres) la.7s Check: 2011 s&Spm & BMPDes Ions Lht r •. Unear project? No Lend cover areas entered correctly? Total disturbed area entered? Pre-ReDevelopment Land Cover (acres) A Soils Broils CSolis DSoils Totals Forest/Open Space (acres) - undisturbed est/opern space 7.06 Z06 Managed Turf (acres)- disturbed, graded for yards or other turf to be mowed/managed 7.68 1 7'68 laxpendoes Cover (acres) 4.04 4,04 18.78 Post -Development Land Cover (acres) A Soils BSolis CSolis DSoils Totals FaresVOpan Spero (acres) -undisturbed, protected forest/open space or reforested land 0.00 Managed Turf (acres)- disturbed, graded for yards or other turf to be mowed/managed 6.26 6,26 Impervious; Cover (acres) 12.52 12.52 Area Check OR. OK. OR. OK. 18.78 Constants Runoff Coefficients (Rv) Annual RelMall(inches) 43 ASolls BSolls Csoib DSoils Target Rainfall Event (inches) 1.D0 ForesUOpen Space 0.02 0.03 0.04 0.05 Total Phosphorus RP) EMC (mg/L) 0.26 Managed Turf OAS 0.20 0.22 0.25 Total Nitrogen (TN) EMC (malt) 1.86 Impervious Cover 0.95 0.95 0.95 0.95 Target TP Load file/acre/yr) .4 PJ(unitlesconectlunfaaor) 00;01 LAND COVER SUMMARY -- PRE-REDEVELOPMENTa COVER SUMMARY POST DEVELOPMENT Land Cover Summai Land Cover Summery-Post(Flnol) Lad Cover Summary -Post Land Cover Summary -Post Pre-ReDevelopment Listed Adlusteds Post ReOew&New Impervious Post-ReDevelopment Post -Development New Impervious Forest/Open Space Cover (acres) 7.06 0.00 Forest/Open Space 0.00 Forest/Open Space 0.00 Cover (acres) Cower (acres) 0.00 0% 6.26 Weighted Rv(forest) 0.03 0.00 Weighted Rv(foment) 0.00 Weighted Rv(farest) %Forest 38% D% %Forest 0% %Forest Managed Turf cover (acres) 7.68 6.26 Managed Turf Cover 626 Managed TurfCover (acres) (sues) 0.20 61% 404 Newlmpervious Cover 848 Weighted Rv(turf) 0.20 0.20 Weighted Far (turf) 0.20 Weighted Rv (turf) %Managed Turf 41% 61% %Managed Turf 33% %Managed Turf Impervious Cover(acres) 4.04 4.04 Impervious Cover (acres) 12.52 ReDev. Impervious (ac Coverres) (acres) Rv(impervious) 0.95 0.95 Rv(impervious) 0.95 Rv(lmpwvious) 0.95 Rv(impervious) 0.95 %Impervious 22% 39% %ImpeMous 67% %Impervious 39% Total Site Area (acres) 18.78 20.30 Fioal Site Aree(acres) 28.78 Total Re0er, she Areas 10.30 (acres) Site IN 0.30 0.49 Final Post Bev She Rv 0.70 ReDev Site AN, 0.49 Treatment Volume and Nutrient Load Treatment Volume and Nutrient Load Poet-ReDevelopment Past -Development Pre-ReDevelopment Treatment Volume Final Port -Development (acre-k) 0.4655 0.4242 Treatment Volume 1.0955 Treatment Volume 0.4242 Treatment Volume 0.6713 (ac ft) (•ae-ft) lacrrk) I Port-ReDevelopment Post -Development Pre-ReDevelopment Treatment Volume Final Port -Development (cubic feet) 20,276 18,477 Treatment Volume 47,720 Treatment Volume 18,477 Treatment Volume (cubic 29,243 (cubic feet) (cMNCfeet) feet) Post-ReDevelopment Post -Development TP Leatl� Pre-ReDevelopment TP Load Final Post. (lb/yr) 12.74 11.61 Development TP Load 29.98 Load (TP) 11.62 (lb/yr) 18.37 (lbi (lb/yr)* Post -ReDevelopment TP Pre-ReDavlopment TP Load per acre Final Post Development TP (Ile/aere/yr) 0.68 1.13:: Load Par acre 1.60 Load per Doe 1.13 (Ile/acre/W) (lb/acre/yr) Baseline TP load (lb/yr) Max. Reduction Required (0.41Ite/aoe/w applied to pro -redevelopment area exclulingpervious 4.22 (Below Pre 20% land proposed for new impervious cover) ReDevelopment Load) 'Adjusted Land Cover Summary: TP Load Reduction TP Load Reduction Pre ReDevelopment land cover minus pervious land cover goresoiaxen spare or managed Required for 2.32 Required for New 14.90 Redeveloped Area topacreapepropasedfw rsew/mperv/ous rover. Impervious Area lib/yr) Ib/yr) Adjusted Malxrea9e isromittent with Past-ReDevelopment acreage (minus arreape of newimpaviouscoved. Column I shows load reduction requdement farnew impervious cover(basedon drew developmerd load limit. 0.41 /M/acre/year). Post-Development Load Reduction Required (Ile/yr) 17.22 Nitrogen Loads (Informational Purposes Only) Final Post -Development TN Load Pre-ReDevelopment TN Load (Iterm) 91.14 (Post-ReDevelopment & New Impervious) 214.49 (lb/yr) Drainage Area A Drainage Area A land Cover (acres) A Solis Bsolls Csees DSoils Totals Land Cover Rv Furest7OPan Space acres) 0.00 0.00 Managed Turf (acres) 2.81 2.81 0.20 Impervious over (saes) 11.39 11.39 0.95 Total 14.20 Stormwater Best Mara Bement Practices (RR = Runoff Reduction) Total Phosphorus Available for Removal in D.A. A 0b/yr) 25.96 Post Development Treatment Volume in D.A. A Ift') 41,318 --Select from droadown lists - Runoff Managed Impervious Volume from Runoff Remaining Total BMP Phosphorus Phosphorus Load Untreated Phosphorus Remaining Practice Reduction Turf Credit Cover Credit Upstream Runoff Treatment Removal from Upstream Phosphorus Load Removed By Phosphorus Wad Downstream Practice to be Credit (%) Area (acres) a a Reduction (ft) Area (acres) Practice (ft) a Volume (ft) a Volume (ft) Efficiency (%) Pra«ices file) to Practice fib) Practice lib) file) Employed i.e. Vegetated Roof al (spec M) 45 0 0 a 0 0.00 0.00 0.00 I.b. Vegetated Roof a2 (Spec 1 60 0 0 0 0 O.W 0.00 0.0D 2. Rooftop Disconnection (RR) 2a. Ample Duciumealcm to A/B balls (Spec al) 50 0 0 0 0 0 0.00 0.00 0.00 0.00 2.1b. Ample Disconnection to CID sells (Spec s3) 25 0 0 0 0 0 0.00 0.00 0.00 0.00 2.c. To Sell Amended Filter Path as per 0 0 D a o O.W 0.00 0.00 O.W spedfica0ons (existing C/O sells) (Spec ail) 2.d. To Dry Well or French Drain ai, Micrminfilretton ai (Spec Al) 50 0 0 0 0 25 O.W O.W 0.0 O.W 2.e. To Dry Well or French Dreln s2, W 0 0 0 0 25 aw 0.00 0.00 0.00 Micro-Infiltratlon a2(Spec a8) 21 To Rain Garden al, Mism atnerention 01(Spee 0) 40 0 0 0 0 25 O.W 0.D0 0.00 O.W 28. To Rain Garden a2' 80 0 0 0 0 50 O.W O.W 0.00 O.W Mlao-Bioretention a2 (Spec 49) 2.1.To Balnwaterflumating(Spee"i 0 0 0 0 O 0 0.00 0.00 0.00 0.00 2.1. To Stomxvater Plarnen Urban Bhureentlon (Spec a9, Appendix A) 40 0 0 0 0 25 0100 0.00 0.00 0.00 Parri Pavement (RR) 3.a. Permeable Pavement #1 (SW 97) 45 0 0 0 0 25 O.W 0.00 0.00 O.W 3.6. Permeable Pavement a2(Spec a7) 75 0 0 0 25 0.00 0.00 O.OD 4. Grass Channel IRS) 4a. Grass Channel "If Sells (So. ail 20 0 0 D 0 15 0.00 om 0.00 am 4.1, Grass Channel CID sells (Sped a3) SO 0 0 0 0 15 0.00 0.00 Bag 0.00 4.C. Gross Channel with Compost AmendedSells as per spear (ace Spec Bill 30 a 0 0 D 15 0.W 0.00 0.00ON s S.a. Dry Swale#1(Spec a10) 40 a 0 0 0 20 Doo BLIND BAD OM SAL Dry Swale a2(Sped 410) W 0 0 0 0 40 O.W 0.00 0.00 0.00 6.a•Bioretention sl or Woo-eimatervon 91 or Urban Bioretention(Spec a9) 0 0 0 0 25 0.00 0.000.00 0.00 6.6. Bioretentlon a3 or Mlao-BioreteMlon KZ (Spec 419) BO 0 0 0 0 50 O.W 0.0 0.00 0.00 Infiltration 7. (RR) 7a, Infiltration al(Sped 48) 5o 0 0 0 0 25 O.W OM 0.00 ODO 71. Infiltration s2 ISM M) 90 0 0 0 0 25 0.00 0.00 0.00 0.00 8. Extended Detention Pond (RR) B.a. ED#1(Spec sly) 0 0 0 0 0 15 0.00 0.00 0.00 0.00 Be ED a2(Spec a15) 15 0 0 0 0 15 am O.W ON 0.00 Be. Sheediow to Conservation Area, Ala Soils (Spec a2) 75 0 0 0 0 0 am O.W 0.00 am 91. Sheediow to Conservation Area, C/o Sdis (Spec s2) SO 0 0 0 0 D 0.D0 0.00 0.00 ow 9.c Sheetflow, to Vegetated Filter Strip, A Soils or Campost Amended B/C/B sails 5o 0 0 0 0 0 O.W 0.00 0.00 O.W (Spec p2 & ail( TOTAL IMPERVIOUS COVER TREATED (*&) 0.00 AREA CHECK: OR. TOTAL MANAGED TURF AREA TREATED (arc) 1 0.00 AREA CHECK: OK. TOTAL RUNOFF REDUCTION IN D.A. A (Hall 0 TOTAL PHOSPHORUS AVAILABLE FOR REMOVAL IN D.A. A (Ib/yr) 25.96 TOTAL PHOSPHORUS REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr) 0.00 TOTAL PHOSPHORUS REMAINING AFTER APPLYING RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr) 25,96 SEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS 10u. Wet Swale #1(Specall) a 0 0 a 0 20 O.W 0.0 0,00 0.00 10.b. We Swale al (Spec all) 0 D o D o 40 O.W O.W 0.00 0.00 1. Flltn,mgPmcticdp(nmRR) II.a.Flherm, Prectira al(Sped a121 0 0 0 0 0 60 0.00 ON O.W 0.00 IS.b. Rltering Practice R Isaac all) 0 a 0 0 0 65 0.00 0.00 0.00 0.00 12. Constructed Wetland (no RR) 13A.Conctrueted Wetland al (SPec a13) 0 0 0 0 o so o.00 a- 0-0 a- 121 Constrected Wetland a2(SPac a131 0 0 0 0 0 75 0.00 0.00 0.00 0.00 13. Wet Ponds (no RR) 13.a. Wet Pond al(SPac a14) 0 0 0 0 0 50 0.00 0.00 0.00 0.00 14.b. MM-Blwaing 13.b. Wait Pond al(Coastal Plain)(SW Nit) 0 0 0 0 a 45 O.W OM 0.00 am 13.c. Wet Pond a2(SPaC I114) 0 0 0 0 0 75 0.00 0.00 0.00 0.00 134 Wait Ford #2(Coasol Plain)(5pec a14) D o 0 0 a 65 O.W 0.00 0.00 o.W 14a. Manufactured Treatment Dealce- Hydrodynamic D 1.D BAB a 0 33,873 33,873 20 am 21.26 4.25 17.01 14.b. MTD- Filtering 14.1b. Manufactured Treatment Devlce-Fiitedna 0 1.04 1.94 33,873 0 41,318 41,318 40 17.01 4.67 8.67 13.01 14.c. Manufactured Treatment OevlceGenedc 0 o B D o 50 Doo O.W 0.00 O.W TOTAL IMPERVIOUS COVER TREATED lac) 11.39 AREA CHECK: OK. TOTAL MANAGED TURF AREA TREATED(ac) 1 2.81 AREA CHECK: OK. TOTAL PHOSPHORUS REMOVAL REQUIRED ON SITE(Ib/yr) 17.22 TOTAL PHOSPHORUS AVAILABLE FOR REMOVAL IN D.A. A lib/yr)X1304 TOTAL PHOSPHORUS REMOVED WITHOUT RUNOFF REDUCTION PRACTICES IN D.A. A (Ib/yr) TOTAL PHOSPHORUS REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. A Qb/yr) TOTAL PHOSPHORUS LOAD REDUCTION ACHIEVED IN D.A. A (lb/yr) TOTAL PHOSPHORUS REMAINING AFTER APPLYING BMP LOAD REDUCTIONS IN D.A. A (lb/yr) ISEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS NITROGEN REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr) OAO NITROGEN REMOVED WITHOUT RUNOFF REDUCTION PRACTICES IN D.A. A (lb/yr) 0.00 TOTAL NITROGEN REMOVED PRACTICES: D.A. A (lb/yr) 0.00 Nitrogen Nitrogen Load Untreated Nitrogen Remaining Removal from Upstream Nitrogen Load Removed By Nitrogen Load Eifldency 1%) Practices (Ibs) to Practice (Ibs) Practice Iles) fibs) 0 0.00 0.00 0.00 0 0.00 0.00 0.00 2. Rooftop Disconnection (RR) 0 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 G 0.00 0.00 BLIND 0.00 15 one 0.00 0.00 0.00 15 0.00 0.00 0.00 ow 40 0.00 o.W 0.00 0.00 60 0.00 O.W O.W 0.00 0 0.00 0.00 0.00 0.00 40 0.00 0.00 O.W 0.00 3. Permeable Pavement (RR) 4. Grass Channel 20 (RR) 0.00 ON BLIND 0.00 20 0.00 0.00 0.00 0.00 20 0.00 s 25 0.00 0.00 0.00 O.W 35 0100 aw 0.00 O.W 40 non Ban 0.00 0.00 60 0,00 0.00 B.W am 7. Infiltration IRK) is a.oD 0.00 B.W 0.00 15 0.00 0.00 0.00 0.00 8. Extended Detention Pond (RR) 9. Sheetflow to Filter/Open Space IRR) 0 TOTAL RUNOFF REDUCTION IN D.A. A (fta) 0 NITROGEN REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A. A flb/yr) 0.00 SEE WATER QUALITY COMPLIANCE TAB FOR SITE CALCULATIONS (Information Only) 10. Wet Swale (Coastal Plain) (no RR) 11. Filtering Practices (no RR) 12. Constructed xs Worland (no RR) a.o0 0.00 DDO 0.00 55 0.00 0.00 0.00 0.DO 13. Wet Ponds 30 (no RR) 0.00 0.00 O.m 0.00 20 ODD O.W 0.W OM 40 0.00 0.00 0.00 0.00 30 0.00 O.W 0.00 0.00 14. Manufactured BMP RR) 0 (no 0.00 152.09 B.W 152.08 0 152.08 33A3 0.00 185.51 a 0.00 am 0.00 B.W W mi O m z EE w Lll LLI fro Z F W W Z W H 0 W Ur KW W0 jW z>-O - W W Fwax wz _J>Z0UJW0 u55M<QzQ z(n�LLIcl.ZFH 0zaQQ~O Q J 0C 0 U) W z z a Q > a < Ir U W 1- U) REVISIONS REV I DATE I COMMENT 1 105/18/22 1 COUNTY COMMENTS I i 2 107/01/22 1 COUNTY COMMENETS I i 1 Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 10/7/2021 CAD I.D.: SWP-0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com TH RTAN YAUUER Lic. No. 0402056625 07/01 /2022 SHEET TITLE: STORMWATER BMP DETAILS SHEET NUMBER: C-903A REVISION 2 - 07/01/22 1 YEAR STORM HYDROGRAPHS 1 2 3 4 7 Hydrograph Report Hydrograph Report Hydrograph Report Hydrograph Report Hydrograph Report Hyd,b1. HydrogapheExlenslcnfor Autod.WCM1300 by Aubtlesk, Inc. QUO Thursday, 03/3/2022 Hydaflow Hydragraplu Exenslon for AutodmW CMI 3M by Autodesk. Inc. Q020 Thursday, 03/312022 Hydreflow Hydregrapks E#enslcnforAutodeaWCM1300 by Autodmk, lm. Q020 Thursday, 03/3/2022 Hydraflav Hydrograpbs Etlens0onforAutamMCM1300 by Autotlesk, Inc. Q020 Thursday, 031312OU Hydmflav HydmgmpN E#enslonfor Auta mWCI,41300 by Pnlotlesk, Inc. QUO Tburstlay, 0313/2022 Hyd. No. 1 Hyd. No. 3 Hyd. No. 4 Hyd. No. 5 Hyd. No. 7 Pre-Dev POI #1 Post-Dev to POI #1 Post-Dev Undetained to POI #1 Post-Dev to System 1 Total Post-Dev POI #1 Hydrograph type = SCS Runoff Peak discharge = 8.802 cfs Hydrograph type = SCS Runoff Peak discharge = 35.77 cis Hydrograph type = SCS Runoff Peak discharge = 0.472 cis Hydrograph type = Reservoir Peak discharge = 1.340 cis Hydrograph type = Combine Peak discharge = 1.653 cfs Storm frequency = 1 yrs Time to peak = 718 min Storm frequency = 1 yrs Time to peak = 716 min Storm frequency = 1 yrs Time to peak = 718 min Storm frequency = 1 yrs Time to peak = 808 min Storm frequency = 1 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume Y = 17 985 cult Time interval = 2 min Hyd. volume Y = 74 503 cult Time interval = 2 min Hyd. volume Y = 1 179 cult Time interval = 2 min Hyd. volume Y = 74 311 cult Time interval = 2 min Hyd. volume Y = 75,490 cult Drainage area = 6.950 ac Curve number = 71" Drainage area = 10.570 ac Curve number = 91" Drainage area = 0.870 ac Curve number = 62" Inflow hyd. No. = 3 -Post-Dav to POI 91 Max. Elevation = 467.64 ft Inflow hyds. = 4, 5 Contrib. drain. area = 0.870 ac Basin Sloe P 0 = 0.0 /o Hydraulic length Y 9 = 0 ft Basin Sloe P 0 = 0.0 /o Hydraulic length Y 9t = 0 ft 4 Basin Sloe = 0.0 /o P Hydraulic length Y = 0 ft Reservoir name = System 1 Ys Max. Story 9e = 42,979 tuft Tc method =User Time of coot. (Tc) = 6.50 min Tc method =User Time of coot. (Tc) = 5.00 min Tc method =User . Time of coot. (Tc) = 5.00 min Total precip. = 3.00 in Distribution = Type II Total precip. = 3.00 in Distribution = Type II Total precip. = 3.00 in Distribution = Type II storage lnd'cedon meted used. Stone duration = 24 hrs Shape factor = 484 Stone duration = 24 hrs Shape factor = 484 Stone duration = 24 hrs Shape factor = 484 Comp ft(AssICN)=1(1.410 x0)•(2.800 x SO)•(2.740 x 69)]/ 6.950 'Com"Re(Aree/CN)=I(8.66o x0)•(0.300 x 60)•(1,610 x 61H I to.670 Composts(AraeICN)= 1(0.W0 x 98)•(0.850 x 61)I 10.870 Pre-Dev POI #1 Post-Dev to POI #1 Post-Dev Undetained to Pot #1 Q (cfs) Q (cts) Q (cis) Hyd. (cfs) Q (ors) Q (ors) Q (cfs) Hyd. No. 1 - i Year Hyd. No. 3 -1 Year Hyd. No. 4 -1 Year 10.00 8.00 6.00 4.00 2.00 0 00 0.50 40.00 0.45 0.40 30.00 0.35 0.30 0.25 20.00 0.20 0.15 10.00 0.10 0.05 Post-Dev to System 1 Hyd. No. 5 -- 1 Year Q (ors) Q (cfs) 40.00 2.00 30.00 20.00 1.00 10.00 0.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 0 120 240 360 480 600 720 840 960 1080 1200 1320 0 120 240 360 400 600 720 840 960 1080 1200 1320 1440 1560 0 240 480 720 960 1200 1440 1580 1920 2160 2400 - Hyd No. 1 Time (min) -Hyd No. 3 Time (min) -Hyd No. 4 Time (min) Time (min) o. o. 3 Totalstorage used=42,979 cult 10.00 40.00 8.00 30.00 6.00 20.00 4.00 10.00 2.00 000 000 40.00 0.50 0.45 0.40 30.00 0.35 0.30 20.00 0.25 0.20 0.15 10.00 0.10 0.05 000 000 Total Post-Dev POI 01 Hyd. No. 7 -1 Year Q (afs) 2.00 1.00 0.00 - - 0.00 0 240 480 720 960 1200 we 1580 1920 2160 2400 - Hyd No. 7 - Hyd No. 4 - Hyd No. 5 Time (min) Hydrograph Report 6 Hydrograph Report 6 Hydrograph Report 9 Hydrograph Report 10 Hydrograph Report 12 Hydaflow Hydrographs Extension for MbcdmW CM13M by Autodesk, Inc. ✓e020 Thursday, 03 / 3/ 2022 Hyd. No. 6 Pre-Dev POI #2 Hydrograph type = SCS Runoff Peak discharge = 7.320 cis Stone frequency = 1 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 17,500 cuft Drainage area = 6.340 ac Curve number = 71" Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of cone. (Tc) = 8.70 min Total precip. = 3.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Composh,(MeICN)=1(I Mx0)+(2.a60 x60)+(2230 x%H/6.340 Pre-Dev POI #2 Q (cfs) Hyd. No. 6 - i Year 8.00 8.00 4.00 2.00 0 00 Hydaflox Hydrograph% Extension for AutodmW CMI 3M by Autodesk. Inc. QUO Thursday, 03 / 3/ 2022 Hyd. No. 8 Post-Dev to POI #2 Hydrograph type = SCS Runoff Peak discharge = 11.09 cis Storm frequency = 1 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 22,399 cuft Drainage area = 4.550 ac Curve number = 83" Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of cone. (Tc) = 5.00 min Total precip. = 3.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Hydraflav Hydregaphs Extension for Autode kW CMI 3M by Autodesk, Inc. Q020 Thursday, 03 / 3 / 2022 Hyd. No. 9 Post-Dev Undetained to POI #2 Hydrograph type = SCS Runoff Peak discharge = 1.598 cis Storm frequency = 1 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 3,204 cuft Drainage area = 0.980 ac Curve number = 75" Basin Slope = 0.0 % Hydraulic length = 0 ft Te method = User Time of cone. (Tc) = 5.00 min Total precip. = 3.00 in Distribution = Type II Storm duration = 24 his Shape factor = 484 OompoaRe (AraeICN)=1(2.740 x0)+(0.440 x GO) +(1.370 x SIH 14.550 ' Compceile (MeICN)=I(0.370 xW+(0.610 x61H 10" Post-Dev to POI #2 Post-Dev Undetained to POI 92 Q () Q (ors) Hyd. No. 8 - t Year Q (ors) Q (cfs) Hyd. No. 9 -1 Year 8.00 12.00 10.00 6.00 8.00 4.00 6.00 4.00 2.00 2,00 000 000 12.00 2.00 10.00 8,00 6.00 1.00 4.00 2.00 000 000 Hydaflow Hydragaphs Extension for MbbdesW Civil 3M by Autodesk, Inc. QU2 Tuesday, 06 / 28 Mn Hyd. No. 10 Post-Dev to System 2 Hydrograph type = Reservoir Peak discharge = 2.486 cis Storm frequency = 1 yrs Time to peak = 726 min Time interval = 2 min Hyd. volume = 22,399 cuft Inflow hyd. No. = 8 - Post-Dev to POI #2 Max. Elevation = 462.42 ft Reservoir name = System 2 Max. Storage = 6,861 cuft Storage Indication me6od used. Hydraflm Hydrogaphs Extension for AutpdmW Civil 3M by Autodesk, Inc, Q022 Tuesday, 06128 12022 Hyd. No. 11 Total Post-Dev POI #2 Hydrograph type = Combine Peak discharge = 3.792 cis Storm frequency = 1 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 25,603 cuft Inflow hyds. = 9, 10 Contrib. drain. area = 0.980 ac Post-Dev to System 2 Q O Q (ors) Hyd. No. 10 - 1 Year Q ids) Q O 12.00 4.00 10.00 3.00 8.00 6.00 2.00 4.00 1.00 2.00 Total Post-Dev POI #2 Hyd. No. 11 - 1 Year Q (cfs) 4.00 3.00 2.00 1.00 0.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 15W 0 120 240 360 480 600 72D 840 960 1080 1200 1320 1440 1560 0 120 240 360 400 600 72D 840 960 1080 1200 1320 1440 1560 Time (min) Time (min) Time (min) Time (min) Time (min) - Hyd No. 6 -Hyd Nab -Hyd No. 9 -Hyd No. 10 -Hyd No. 8 ®Total storage used = 6,861 cub - Hyd No. 11 -Hyd No. 9 -Hyd No. 10 2.00 12.00 10.00 8.00 1.00 6.00 4.00 2.00 000 000 Hydrograph Report Hydnalm Hydrographa Edemion forAubdmke CNR 30e by Autodmk, Ina QUO Hyd. No. 12 Pre-Dev POI #3 Hydrograph type = SCS Runoff Stone frequency = 1 yrs Time interval = 2 min Drainage area = 5.900 ac Basin Slope = 0.0 % Tc method = TR55 Total precip. = 3.00 in Stone duration = 24 hrs 13 14 Hydrograph Report Thursday. 03/3/2812 Hydraflow Hydragreplls Edemioa for Au 10 CM 30e byPNpdeek, toa QUO Thursday, 03/3/2022 Hyd. No. 13 Post-Dev POI #3 Peak discharge = 7.314 cfs Hydrograph type = SCS Runoff Peak discharge = 2.430 cfs Time to peak = 720 min Stone frequency = 1 yrs Time to peak = 718 min Hyd. volume = 17,307 tuft Time interval = 2 min Hyd. volume = 5,059 cult Curve number = 72" Drainage area = 2.220 ac Curve number = 69" Hydraulic length = 0 ft Basin Slope = 0.0 % Hydraulic length = 0 ft Time of cone. (Tc) = 8.50 min Tc method = User Time of cone. (Tc) = 5.00 min Distribution = Type II Total precip. = 3.00 in Distribution = Type II Shape factor = 484 Stone duration = 24 hrs Shape factor = 484 • CQmpoaRe (AreeICN)=1(1.1 W x98) • (2.1tOx80) • r2.810x WH / 6.91x1 Pre-Dev POI #3 0 (da) Hyd. No. 12 -1 Year 8.00 6.00 4.00 2.00 ' CompmRe (AreelcM=1(oAfiO x98) • (1.7m x81)1/2.220 Post-Dev POI #3 Q (ds) Q (da) Hyd. No. 13 - 1 Year 8.00 3.00 6.00 2.00 4.00 1.00 2.00 Q (cfs) 3.00 2.00 1.00 F� w W s; Z R; W W Z w 2Fas Iz > w C70w s� f 8: Ur Z W W V0 j w w1 zrCOt=wofU P: W z g � z w r J > U J O Q (7 H i HOf 0 z w U P 2 a- Z J U U of U a£ J az�a< a: Q of - J F 0 of O U) os Im o[ REVISIONS DRAV REV DATE COMMENT cxEcxE:11 1 05/18/22 COUNTY COMMENTS PC Rl 2 07/01/22 COUNTY COMMENETS PC Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL ANDIOR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 10/7/2021 CAD I.D.: SWP-0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com .a.ALTH e.. RYANYAUUER Lic. No. 0402056625 ;� 07/01/2022 SHEET TITLE: STORMWATER COMPLIANCE SHEET SHEET NUMBER C-904 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 15W - Hyd No. 12 Time (min) 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 - Hyd No. 13 Time (min) REVISION 2 - 07/01/22 2 YEAR STORM HYDROGRAPHS Hydrograph Report 15 Hydrograph Report 16 Hydrograph Report 17 Hydrograph Report 16 Hydrograph Report Hydri Hydngmphs E nsbn for AumtleskW CIv1130W by Autadesk, Inc. v2020 Thursday, 03/3/WV Hyd. No. 1 Pre-Dev POI #1 Hydrograph type = SCS Runoff Peak discharge = 13.45 cfs Storm frequency = 2 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 26,982 cult Drainage area = 6.950 ac Curve number = 71' Basin Slope = 0.0 % Hydraulic length = 0 ft To method = User Time of conc. (To) = 6.50 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 • Composite (AresICN)= [OA10 x 98)+(2.800 x 60) r (2.740 a69)] 16.950 Pre-Dev POI #1 Q (ds) Hyd. No. 1- 2 Year Q (ds) 14.00 12.00 10.00 8.00 6.00 4.00 2.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 - Hyd No. 1 Time (min) 14.00 12.00 10.00 8.00 6.00 4.00 2.00 0 00 19 Hydrograph Report Hydmflow Hydrogmphs Extension for AutodeskW Civi130W by Autadesk, Inc. v2020 Thursday, 031312022 Hyd. No. 6 Pre-Dev POI #2 Hydrograph type = SCS Runoff Peak discharge = 11.31 cfs Storm frequency = 2 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 26,255 cult Drainage area = 6.340 ac Curve number = 71' Basin Slope = 0.0 % Hydraulic length = Off To method = TR55 Time of conc. (To) = 8.70 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 • Comibses (ArmxN) _ [(1260 x 98) +(2.850 x 50)+(1.230 x 6911 6.810 Pre-Dev POI 92 Q (ds) Hyd. No. 6- 2 Year Q We) 12.00 10.00 8.00 6.00 4.00 2.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 - Hyd No 6 Time (min) 12.00 10.00 8.00 6.00 4.00 2.00 0 00 HydreOav Hydmgrali Extension for AutoxisIMilb CM130W by Aubtleiii Inc. Q020 Thursday, 03 13 12022 Hyd. No. 3 Post-Dev to POI #1 Hydrograph type = SCS Runoff Peak discharge = 45.23 cfs Storm frequency = 2 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 95,500 cult Drainage area = 10.570 ac Curve number = 91' Basin Slope = 0.0 % Hydraulic length = 0lt To method = User Time of oonc. (To) = 5.00 min Total precip. = 3.62 in Distribution = Type II Stone duration = 24 hrs Shape factor = 484 111 11111111111111111111111111111,11111111111111,11111111111111,------ 111 ---------- 1 1I)IIIIIIIIIIIII,IIIIIIIIIIIIII,IIIIIIIIIIIIII,IIIIIIIIIIIIII,-�---- 111 11111111111111,--------- 111 111 11 111 11111111111111,11111111111111, 11111111111111--rj_- 111 1 1 .1 .1 .:1 .11 r :.1 •.1 1:1 11 21 Hydrograph Report Hydmfl°ry Hydrogmphs Extension for AutodesMc Civil 30W by Autodesk. Inc. ao20 Thursday, 03 / 3/ 2022 Hyd. No. 8 Post-Dev to POI #2 Hydrograph type = SCS Runoff Peak discharge = 14.98 cfs Storm frequency = 2 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 30,348 cult Drainage area = 4.550 ac Curve number = 83` Basin Slope = 0.0 % Hydraulic length = 0 ft To method = User Time of conc. (To) = 5.00 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 • Composite (A saICN)=1/2.7aa x 90) + (0A40 x W) + (1.370 x 613 14.590 Post-Dev to POI #2 a (ors) Hyd. No. 8 - 2 Year Q (ds) 15.00 15.00 12.00 12.00 9.00 9.00 6.00 6-00 3.00 3.00 0.00 0.00 0 120 240 360 480 600 72D 840 960 1080 1200 1320 1440 - Hyd No. 8 Time (min) Hydrallm Hydragmphs Extension for Autodeska CM130W by Autpdesk, Inc. v2020 Hyd. No. 4 Post-Dev Undetained to POI #1 Hydrograph type = SCS Runoff Storm frequency = 2 yrs Time interval = 2 min Drainage area = 0.870 ac Basin Slope = 0.0 % To method = User Total precip. = 3.62 in Stone duration = 24 hrs Thursday, 03131 WV Peak discharge = 0.918 cfs Time to peak = 718 min Hyd. volume = 1,991 cult Curve number = 62' Hydraulic length = 0 ft Time of conc. (Tc) = 5.00 min Distribution = Type II Shape factor = 484 • Composte (ArwICN) _ [(0.020 x90)+(0.050 x 61)] / 0.870 Post-Dev Undetained to POI #1 Q Wall Hyd. No. 4 - 2 Year Q (ds) 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0 00 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0 120 240 360 480 600 720 540 960 1080 1200 1320 1440 1560 0.00 - Hyd No. 4 Time (min) 22 Hydrograph Report Hydral Hydmgmphs Extension for Aulocki CWiI3DW by Auladesk, Inc. v2020 Thursday, 0313 / 2022 Hyd. No. 9 Post-Dev Undetained to POI #2 Hydrograph type = SCS Runoff Peak discharge = 2.313 cfs Storm frequency = 2 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 4,627 cuft Drainage area = 0.980 ac Curve number = 75' Basin Slope = 0.0 % Hydraulic length = Oft To method = User Time of conc. (To) = 5.00 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Comlwim (AnadCN) = I10.970 x 90) + (0.610 x 61)] 10.980 Post-Dev Undetained to POI #2 Q (cfs) Hyd. No. 9 - 2 Year 3.00 2.00 1.00 Q (ds) 3.00 2.00 1.00 0.00 1 0.00 0 12D 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 - Hyd No. 9 Time (min) Hydrybow Hydrographs Extension for AutodeskW CM13DW by Autadesk, Inc. v2020 Thursday. 03 / 3 / 2022 Hyd. No. 5 Post-Dev to System 1 Hydrograph type = Reservoir Peak discharge = 2.909 cfs Stone frequency = 2 yrs Time to peak = 754 min Time interval = 2 min Hyd. volume = 95,309 cult Inflow hY d. No. = 3 - Post-Dev to POI 91 Max. Elevation = 468.37 ft Reservoir name =System 1 Max. Storage = 52,704 sift Smre9e lndibabn sysi od used. Q(ds) Post-Dev to System 1 Hyd. No. 5- 2 Year Hydreflox Hydrogrophs Eidenslon for Autodeska CMI30W by Autodesk. Inc. v2020 Hyd. No. 7 Total Post-Dev POI #1 Hydrograph type = Combine Storm frequency = 2 yrs Time interval = 2 min Inflow hY ds. = 4 5 11111111111111,_�------- 1 11 1 11 1 11 --- ------- --- ------- g 3 Z s W w zo z F � w � Z W�Zw> o Thursday, 03/3/2022 w (D U - U x w ozwww5w - Z5:('i~QtYU g Fwax wz � D LY Q LY J 0 � Peak discharge 2.999 cfs U) 7 2 Q Q Z Q Time to peak - 754 min=1j Z (� 2 w Z H 1-- Hyd. volume = 97,300 cult O 0 Q O- Q F O p Contrib. drain. area = 0.870 so Q Q d' U 0- QJO0c)Wz g J o_ z o_ of of J y- U O w a i7 Total Post-Dev POI #1 Hyd. No. 7 - 2 Year O(sl LJI to REVISIONS MI 2.00 REV DATE COMMENT Owl GIECI 1 05/18/22 COUNTY COMMENTS R. R 2 07/0 //22 COUNTY COMMENETS P( 1.00 _ 0 240 480 720 960 1200 1440 1880 1920 2180 2400 0 240 480 720 960 1200 1440 1680 1920 2180 2400 0.00 - Hyd No. 5 - Hyd No. 3 ®I Total storage used = 52,704 cult Time (min) _ Hyd No. 7 - Hyd No. 4 - Hyd No. 5 Time (min) 23 24 • Hydrograph Report Hydrograph Report Hydni Hydrogmphs Ddensbn for Auccleske, WI 3DW by Autadesk, Inc. v2022 Tuesday, 06/28/2022 Hydmflow Hidngmpbs Extension for AutodeskW Civil 306 by Aut°dask, Inc. v2022 Tuesday, 06/28/2022 Hyd. No. 10 Hyd. No. 11 Know what's below. Post-Dev to System 2 Total Post-Dev POI #2 Call before you dig. Hydrograph type = Reservoir Peak discharge = 4.859 cfs Hydrograph type = Combine Peak discharge = 5.889 cfs ALWAYS CALL 811 Stone frequency = 2 yrs Time to peak = 724 min Storm frequency = 2 yrs Time to peak = 722 min Time interval = 2 min Hyd. volume = 30,348 cult Time interval = 2 min Hyd. volume = 34,975 cult It's fast. It's free. It's the law. Inflow hyd. No. = 8 - Post-Dev to POI #2 Max. Elevation = 46324 ft Inflow hyds. = 9, 10 Contrib. drain. area = 0.980 so Reservoir name = System 2 Max. Storage = 9,483 cuft amre9e lndice80n metlrotl ueetl. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION Post-Dev to System 2 Total Post-Dev POI #2 DOCUMENT UNLESS INDICATED OTHERWISE. Q Will Hyd. No. 10 - 2 Year Q (dill a (crs) Hyd. No. 11 - 2 Year Q (ds) PROJECT No.: V192076 15.00 15.00 5.00 6.00 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 10/7/2021 5.00 5.00 CAD I.D.: SWP-0 12.00 12.00 PROJECT: 4.00 4.00 VIRGINIA 9.00 9.00 STORMWATER 3.09 3.00 MANAGEMENT PLAN 5:00 6.00 FOR 2.00 2.00 3.°° 3.°° 1.00 1.00 RST RESIDENCES inku 0.00 0.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 - Hyd No. 10 - Hyd No. 8 ® Total storage used = 9,483 cut Time (min) - Hyd No. 11 - Hyd No. 9 - Hyd No. 10 Time (min) PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 25 26 ALBEMARLE COUNTY, VA Hydrograph Report Hydrograph Report Hydr mHydrompha Extensionfor AumOeskWCMI 306by Aumdeek, lac.J2020 Thursday, 09/3/2W2 Hyd. No. 12 Pre-Dev POI #3 Hydrograph type = SCS Runoff Peak discharge = 11.13 cfs Storm frequency = 2 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 25,703 cult Drainage area = 5.900 ac Curve number = 72- Basin Slope = 0.0 % Hydraulic length = 0 ft To method = TR55 Time of conc. (To) = 8.50 min Total precip. = 3.62 in Distribution = Type II Stone duration = 24 hrs Shape factor = 484 - Composite (AresICN) = lr.180 x 90) + (2.110 x 60) + (2TH 0 x 698 / Sa00 Pre-Dev POI #3 Hydreflov Hydrogrephs E#ensbn fa AumdeskW CMI 3010 by Aumdesk, Inc. v2020 Thursday, 03 / 3/ 2022 Hyd. No. 13 Post-Dev POI #3 Hydrograph type = SCS Runoff Peak discharge = 3.839 cfs Storm frequency = 2 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 7,756 cuff Drainage area = 2.220 ac Curve number = 69• Basin Slope = 0.0 % Hydraulic length = 0 ft To method = User Time of conc. (To) = 5.00 min Total precip. = 3.62 in Distribution = Type II Stone duration = 24 hrs Shape factor = 484 • Composte (Ar MX"=R0" x90)+n.770 x 61)] /2.220 Q (ds) Hyd. No. 12 - 2 Year Q (ds) Q (ds) 12.00 10.00 6-00 6.00 4.00 2.00 (Too Post-Dev POI #3 Hyd. No. 13 -- 2 Year Q ids) 4.00 3.00 BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com ,4.pLTH e.. R9%N YAUUER Lic. No. 0402056625 0, 07/01/2022 4 SHEET TITLE: 2.00 STORMWATER COMPLIANCE 1.00 SHEET 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Time (min) - Hyd No. 12 -Hyd No. 13 12.00 4.00 10.00 3.00 8.00 6.00 2.00 4.00 1.00 2.00 000 000 SHEET NUMBER C-905 REVISION 2 - 07/01/22 28.00 24.00 20.00 16.00 12.00 8.00 4.00 000 Hydrograph Report 27 Hydmflow Hydngmphs EManslon for AubtlasW Ovil"by Autadesk, Inc. v2020 Thursday, 03 13 1 WV Hyd. No. 1 Pre-Dev POI #1 Hydrograph type = SCS Runoff Peak discharge = 29.12 cis Storm frequency = 10 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 58,608 cuft Drainage area = 6.950 ac Curve number = 71' Basin Slope = 0.0 °h Hydraulic length = 0lt Tc method = User Time of conc. (Tc) = 6.50 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Hydrograph Report 26 Hydrsflow Hydrographs Extension for Aubdel CMI 3M by Aulodesk, Inc. Q020 Thursday, 03 13 12022 Hyd. No. 3 Post-Dev to POI #1 Hydrograph type = SCS Runoff Peak discharge = 73.24 cis Storm frequency = 10 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 159,690 cuft Drainage area = 10.570 ac Curve number = 91a Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of oonc. (Tc) = 5.00 min Total precip. = 5.47 in Distribution = Type II Stone duration = 24 his Shape factor = 484 ------ ---- r---- �� rrr ------•--- rrr Itttttt�ltttttt�ltttttt�ltttttt�ltttttt��l�� rr -----��,�------ rrr rrr -------I---� -----��__--� Iitititt�litititt�litititt�litititt�llllllllllr� r r .r .r .:r .rr r :-r •.r r:r rr r ..r .r r r .r .r :r .rr I :.r e:r r:r rr 31 Hydrograph Report Hydmflow Hydrogmphs Extension for Autadesk® Civil "by Autadesk, Inc. v2020 Thursday, 0313 12022 Hyd. No. 6 Pre-Dev POI #2 Hydrograph type = SCS Runoff Peak discharge = 24.90 cis Storm frequency = 10 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 57,028 cult Drainage area = 6.340 ac Curve number = 71' Basin Slope = 0.0 % Hydraulic length = Off Tc method = TR55 Time of conc. (Tc) = 8.70 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 • Compoe6e(ArmxN)=[01 x98)+(2.050x 60)+(2.230 x 61/ 6.3r0 Pre-Dev POI 92 q (cfs) Hyd. No. 6 -10 Year Q Will) 28.00 24.00 20.00 16.00 12.00 8.00 4.00 000 33 Hydrograph Report Hydraflov Hydrographs Extension for MlixlecW Civil 3D® by Autodesk. Inc. v2020 Thusday, 03 / 3/ 2022 Hyd. No. 8 Post-Dev to POI #2 Hydrograph type = SCS Runoff Peak discharge = 27.00 cfs Storm frequency = 10 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 55,779 tuft Drainage area = 4.550 ac Curve number = 83` Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 • Compoabs (Arae/CN)=1(2.740 x 90) + (0440 x W) + (1.370 x 613 / 4.550 Post-Dev to POI #2 o (crs) Hyd. No. 8 - 10 Year Q (cfs) 28.00 24.00 20.00 16.00 12.00 8.00 4.00 000 28.00 24.00 20.00 16.00 12.00 8.00 4.00 000 10 YEAR STORM HYDROGRAPHS Hydrograph Report 29 Hydrallox Hydragraphs E4enslon for Aubdesk® CM1"by AuMmk, Inc. v2020 Hyd. No. 4 Post-Dev Undetained to POI #1 Hydrograph type = SCS Runoff Storm frequency = 10 yrs Time interval = 2 min Drainage area = 0.870 ac Basin Slope = 0.0 % Tc method = User Total precip. = 5.47 in Storm duration = 24 hrs Thursday, 03131 WV Peak discharge = 2.563 cis Time to peak = 718 min Hyd. volume = 5,141 cuft Curve number = 62' Hydraulic length = 0 ft Time of conc. (Tc) = 5.00 min Distribution = Type II Shape factor = 484 Composis (A2e/CN) = [to.020 x 90) + (0.050 x 61)] / 0.8m Post-Dev Undetained to POI #1 Q (ds) Hyd. No. 4 -10 Year 3.00 2.00 1.00 Q(ots) 3.00 2.00 1.00 0.00 - I I . 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1660 - Hyd No. 4 Time (min) 34 Hydrograph Report Hydral Hydmgmphs Emnslon for Autbi CW i"by Aubdesk, Inc. v2020 Thursday, 03 13 2022 Hyd. No. 9 Post-Dev Undetained to POI #2 Hydrograph type = SCS Runoff Peak discharge = 4.678 cis Storm frequency = 10 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 9,457 cuft Drainage area = 0.980 ac Curve number = 75• Basin Slope = 0.0 % Hydraulic length = Oft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Comlwile (A,..rA = ((0.370 x 90) + (0.610 x 61)] 10.9810 Post -Dery Undetained to POI #2 Q (cfs) Hyd. No. 9 -10 Year Q (dis) 5.00 4.00 3.00 2.00 1.00 000 5.00 4.00 3.00 2.00 1.00 000 g 3 Z s W a W U) 30 32 Z W Hydrograph Report Hydrograph Report af W z WFzw� Hydrylim Hydrographs Extension for Autotleske CMl3Db by Autodesk, Inc. v2020 Thursday. 03/3/2022 Hydri Hydrogrophs Extension for AutoCeilvs"I30® by Aut°desk. Inc. v2020 Thursday, 03 13 2022 W () U - rJ of (DZW W V)>W $ Hyd. No. 5 Hyd. No. 7 z w Q= LU w z g Post-Dev to System t Total Post-Dev POI #1 J > Z 0 W (n O_ "1 Hydrograph type =Reservoir Peak discharge = 27.55 cfs Hydrograph type =Combine Peak discharge = 28.93 ds U) j M Q "D C7 ~ Stone frequency = 10 yrs Time to peak = 722 min Storm frequency = 10 yrs Time to peak = 722 min=1j Z U) W Z z < Time interval = 2 min Hyd. volume = 159,499 cult Time interval = 2 min Hyd. volume = 164,640 cuft O 0 Q O- Q F Of p Inflow hyd. No. = 3 - Post-Dev to POI 91 Max. Elevation = 47023 ft Inflow hyds. = 4, 5 Contrib. drain. area = 0.870 ac (J Z 0_ U H 0- Reservoir name = System 1 Max. Storage = 74,262 cult Z < (7 0 U) O 0 � W Z Q (n s 0_ z EL Stp Indrea0on ntemm used of of rasa J o_ J F 0 O W b F- n, Post-Dev to System 1 Total Post-Dev POI 1111 a(cr8) Hyd. No. 5 - 10 Year Hyd. No. 7-10 Year Q(crs) s 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 000 .g 70.00 60.00 20.00 50.00 .rrr 15.00 rrr10.00 5.rr --------- I r r rrr 1100 rrr20.00 r10.00 m� • �� --- ------ ■�COUNTYCOMMENTS a �� --- -_---- Ell -------- . ■■ �� i ==®ICE=iiW ■� -- 0 240 480 720 960 1200 1440 1680 1020 2160 0 240 480 720 960 1200 1440 1680 1920 21fi0 Time (min) Time (min) - Hyd No. 5 - Hyd No. 3 ® Total storage used = 74,262 wit - Hyd No. 7 - Hyd No. 4 - Hyd No. 5 35 36 • Hydrograph Report Hydrograph Report Hydri Hydrognsins Ddensbn Ces for Autoke Autad WI" by esk, Inc. v2022 Tuesday, 06/28/2022 Hydmow flHydrogmphs Extension for AutodeckO Civil 309 by Aubdesk, Inc. v2022 Tuesday. o6: 2ai 2022 Hyd. No. 10 Hyd. No. 11 Know what's below. Post-Dev to System 2 Total Post-Dev POI #2 Call before you dig. Hydrograph type = Reservoir Peak discharge = 16.03 cfs Hydrogmph type = Combine Peak discharge = 19.48 cis ALWAYS CALL 811 Stone frequency = 10 yrs Time to peak = 722 min Storm frequency = 10 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 55,779 tuft Time interval = 2 min Hyd. volume = 65,236 tuft It's fast. It's free. It's the law. Inflow hyd. No. = 8 - Post-Dev to POI #2 Max. Elevation = 465.34 ft Inflow hyds. = 9, 10 Contrib. drain. area = 0.980 ac Reservoir name = System 2 Max. Storage = 15,075 tuft storage lndice00n rnsiti ueed NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION Post-Dev to System 2 Total Post-Dev POI #2 DOCUMENT UNLESS INDICATED OTHERWISE. o (cfs) Hyd. No. 10 -10 Year Q (cfs) 0 Ida) Hyd. No. 11 -10 Year Q (cfs) PROJECT No.: V192076 28.00 24.00 20.00 16.00 12.00 8.00 4.00 000 r r r•r • ______ _____ I r rrr DRAWN BY: MEIG I r I I I I I ______ �_�____ PROJECT VIRGINIA STORMWATER MANAGEMENTPLA FOR RST RESIDENCES 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 0 120 240 360 480 600 72D 840 960 1080 1200 1320 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 - Hyd No. 6 Time (min) - Hyd No. 8 Time (min) _ Hyd No. 9 Time (min) - Hyd No. 10 - Hyd No. 8 ® Total storage used = 15,075 CUR Time (min) Hyd No. 11 - Hyd No. 9 - Hyd No. 10 Time (min) PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 37 36 ALBEMARLE COUNTY, VA Hydrograph Report Hydrograph Report Hydralim Hydro9repha Edenaion for AubOasMD Civil 309 by A.rhx",, Inc. v= Thusday, 09 / 3/ 2W2 Hyd. No. 12 Pre-Dev POI #3 Hydrograph type = SCS Runoff Peak discharge = 23.99 cfs Storm frequency = 10 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 54,951 tuft Drainage area = 5.900 ac Curve number = 72' Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 8.50 min Total precip. = 5.47 in Distribution = Type II Stone duration = 24 hrs Shape factor = 484 Cunt o ite(Area/CN)=JOAN x 98)+(2.110 x 60)+(2.610 x ME) 5" Pre-Dev POI 93 Hydiaflow Hydrographa E#ensbn for A Mlb L1vil 306 by Aubdask, Inc. v2020 TMvadey, 03/3/2022 Hyd. No. 13 Post-Dev POI #3 Hydrograph type = SCS Runoff Peak discharge = 8.687 cfs Storm frequency = 10 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 17,418 cuff Drainage area = 2.220 ac Curve number = 61 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 5.47 in Distribution = Type II Stone duration = 24 hrs Shape factor = 484 • composes (Aram=60.450 x90) 4 (1.770 x 61)] /2.220 Post-Dev POI #3 BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com . ZTH e.. 0 (cfs) Hyd. No. 12 -10 Year Q (ds) Q Ida) Hyd. No. 13 -- 10 Year Q (CB) 24.00 V N YA R y 20.00 16.00 12.00 8.00 4.00 000 24.00 10.00 20.00 8.00 16.00 6.00 12.00 4.00 8.00 2.00 4.00 000 000 10.00 .p Lic. No. 0402056625 4• 8.00 �� 07/01/2022 A1.F_.��j 6.00 SHEET TITLE: 4.00 STORMWATER COMPLIANCE 2.00 SHEET SHEET NUMBER: °° C 906 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 - Hyd No. 12 -Hyd No. 13 Time (min) Time (min) REVISION 2 - 07/01/22 PRO- ' 164 _ ISOLATOR ROIN J' , '`q19 II ♦b�� ``\\\`1` `\ \\ III III a \ O \ n p19 \ \ ,, p11 ♦ .� II \ \ \ ♦\♦ ` III 60 `\ Q, \ _ \`♦�\ ♦� Ili �. � � ♦.\�``` ____�� A `I 11 Ili 1 ,'.I 4 v I STM � �� e� � STM I II 8-10 � II 30 B-20 \ v 473 x x 472 x , (ST ,'I y 5 1 / STM / r NNNNIF NNNI ® \ \\ 460 � � 1 \ TL1L� �v �i err-ttd��r -''i va o�.00 SYSTEM 1 PLAN VIEW SCALE: 1" = 30' I I �1 11 II Pond Report 5 Hydre6ow Hydroglapns Eldension for AutodereS CNi13De by Aukdak, Inc. v2020 Tburedry. 03 131 2022 Pond No. i - System t - 1 I Pond Data I1 it I1 I1 II Pond storage is based on userdefined values. if I Stage / Storage Table II II II are IN) Elevation IN) Contourara(sgN) Incr. Siorags loan) Total stores. (cum 000 a3.00 Na 0 0 1 0.08 as N No 553 553 0.50 483m We 2.785 3918 1.00 aalm No 3,318 6,,0315 -. 1.50 464.50 We 3,318 9"N's 2.00 465.00 We 3.318 13.279 I z 3.00 466m Na 3,318 19,909 II I 3.50 as 50 We 7,179 27.080 (I 4.11 arm as 7,080 a4,160 4.50 ai'.50 Na 8,945 41.113 5.00 468.00 Ne 6,768 47.081 II li 1.11 a8.So Na 615/.6 84,416 II I.e. all 00 We 61263 Ise 689 II rn I 6.50 409.50 we 5,we 66,597 [, 7.00 4Mm Na 5,442 72.039 I1Y 7.50 470.50 Na 4,752 76.791 431 lit �I r 8.50 471.SO Na 3,318 83,749 83' I I `ice II I\ I I 1.110 4nm we 3,318 8],007 II II II Culvert otlgce Structures Weir Structures II II II i1 II \ �` [A] [S] ED] [PrfRsrl [A] [B] [C] ED) 11 II \ SYSTEM 1: Rise (in) = 2Am sm 0.00 0.00 Gat Len No = 2.00 2.W 0.W 0.W 1 II \ PROP. ± 87,000 CIF span gal = 24.00 5.00 0.00 0.00 treat EI. to = 461 460.00 O.Da 0.00 v 11 II .I I 11 UNDERGROUND 11 1/ , DETENTION_ SYSTEM No. Navels = 1 lnwd El.(R) =463.00 1 0 463.01 0.00 0 0.00 Wabcdee. Weir Type = 3.33 3.33 =Ret at R 3.33 - 3.33 - ot 11 If 11 11 11/ WITH ISOLATOR ROW Lengtb(IN =7.60 0.87 0.00 0.00 MulfiSfage =Ya Yea No No 11 it 11 11 11 SloP. M) =3.50 0.00 0.00 We 11 II 11 11 NNelue = .013 .013 .013 Na 11 II 11 11 11 VARIABLE WIDTH' once coeR. a0.60 0.6o 0.60 0.6o Wl.(Inlhr) = 0.000(by Wet area) 11 �I �I �I �li SWM FACILITY MUHI-Stags =Na Va No No TINEIev. (n) =0.00 ,I __T" 4T3 ' J � �n \ ,\ 11 , i „ m •, \ 1 \ \ \ `\ `♦ `I ` `y II ', PROP. "KEEP I ' 1 I I 1 I v 1\ \♦`� ` \ ` / �h v v♦ v 1 - RIGHT" SIGN ♦V A\ V ♦V AI `\� ` Q� ` .1 7 `\ \ `♦ \ \ \ ` \ \\ / I I I 1 I 1 1 \ \ \ 1 llg\�\\ `♦ � I I II I 1 1 III'1 , , 1 `, `, 1 1 1 \ TM I !:N\\ n 1 1 1 \\\ \♦ , `, \I \ ROP "KEEP oI Ir `L. 1 1 Ir GHT'ST`*4, i \ \ `♦ `\ `\ `, \ `, '1 `, \ (R4-7r, J �I i �. � I, 1. I° , i I 1 �O � I I II A ♦ 1 , , 11 ♦♦ ♦ Ir v v 1 1 1 ♦ ♦ II i- ] 1 ' p1ti/ A1Q 16 ' 0 \ 1 `,'` `♦� \11 1I `\ \ \ \ 1\ 1 ♦` . 11 ,` , I, \ O` � I'I, �; -" i I \, ♦1 ♦Il II' I V A, 1 A ` ♦ ♦ AI , `, 1 \ ♦ , , ' y�. • , , , l , VARIABLE WIDTH 0 SWM FACILITY oe II ', 1, L _+Ili EASEMENT o I _0 o J I 11 I- III 11� IIII�II 0 ��I II � 1111h1 1 1 1 1 ^ 1 1 1129.1' o ' - 4 SYSTEM 2: o I II PROP. ± 17,000 CIF UNDERGROUND DETENTION SYSTEM , - `,WITH ISOLATOR ROW, O / • I I I I I I I I I 1 11 1 1 D i I Ij Il /l I, I,i I, 1 1 1 1 � 11®\I 11 lit IIII III 'I I r J 11 1 1 III � 1 I I 1% 1\, `I I I O -- I`,. \ -- - 1© 111 IIII IIII II /I ' I I I 1I II1I III1I II 1I1 II1 III IIi IIII lII i'II lI I III iIII 1UBLIC DRAINAGE% 20'PEASEMENT � 18"I RP �- i �'111 IIIIIIIIIIIIIh r \ II 11 II II II II i II II i i i i i i Ili O I I-11'I 'I II II III III II 'Il l'III III 1 1 �, 1 II II II I I I I II II II '� II I l i i I'll I 1 � ill 'ill II III III IIII 'II II IIII I'1 i � `I II II IIIII�I111111;11 IIII 1 1 , I I I I I I I; 1 1 l 1 ♦ j, I 1 1 11 II STM ♦ � \ \\`♦♦� �{\`� \ \♦ `♦ ,� • 1 1 0 1 STM X-F 1 1. INLET ➢i 146562 EASEMENT 30 15 7.5 0 30 1 "= 30' r , II II O, 1 i I `-`I'll l II __ - i -., - 6� / I IS 11 I �- Im alwrta ous-ueerelya ...... ('emacad(as lleot a ndr.aeomemonM1 .rannaileamrssisco). Surge (IN Stage/Discharge ass, IN) 10.00 473.00 8m 471.00 6m 09.00 4.00 07.00 om 463.00 0.00 4.00 am 1200 16.00 20m moo moo 3200 36.00 am 44.00 Tatel D Dlscbelge(oh) Pond Report 11 Hydre6ox HydregrepM Exlereion in AukMeek®Cm13De by Autodesk, Inc. v2l) 2 Tuesday, 06 1281 Pond No. 2 - System 2 Pond Data Pond storage is based on usuckifined values. Stage / Storage Table Stages) Elevation(N) Contour area(sgrt) Incr. Storage(cuN) Total storage oum 0.00 4a000 we 0 0 0.08 a0m Na 137 137 0.50 460.50 Ne des 822 1.00 aim ran 1275 21097 1.50 461,54) Na 1712 3,808 200 46200 Na 1m SA93 2.51 m2.50 rue 1,848 7,141 3.00 463.00 Na L601 8,742 3.50 463.Me We 1,543 10.205 4.00 a4m Na 1,460 11,754 4.50 as 50 Na 1,374 13,128 5.00 465.00 We 1,246 14,3274 5.50 4a5.50 Na 1,018 15,392 6.00 as 00 We 841 16.233 6.50 as 50 Na 822 17,00 8.71 065.75 Na 411 1],486 Culvert/Odgce Structures Weir Structures [A] [S] [C] [PrfRarl [A] 031 [C] ED] Rise (in) = 18.00 am 0.00 0.00 Crest Len IN) = 3.00 Im am 0.00 Spa (in) = raw S00 0.00 0.00 Crest EL (it) = 46580 46260 0.00 D.00 No. Barrels = 1 1 0 0 Weir Coee. = 3.33 3.33 3.33 in Invert El. In) = 459.50 459.51 0.00 0.00 Weir Type =Rat Rest - -- Length IN) = 36.80 0.67 0.00 0.00 Multi -Stage = Year Year No No Slope(%) = 3.60 0.00 0.00 Na N-Value = .013 .013 .013 We OHfla Coen. =0.60 0.60 OIN 060 EaN(Inlbr) = 0.000(by Wet area) MUNISIega = we Yea No No TIN Bev. IN) = 0.00 ��IQiI�CCIT��IOI� ��rrrrrrrrrrrrarrrrrrrrrrrra�� i��rrrrrrrrrr-��rrrrrrrrrr-r�� 'ilriir�i�l_✓� ��_ I� SECTION A -A SECTION A -A PS/LADD INV=463.00 SYSTEM 1 OUTLET STRUCTURE DETAIL NOT TO SCALE NOTE: CONTRACTOR TO PROVIDE SHOP DRAWINGS TO BOHLER ENGINEERING FOR REVIEW AND APPROVAL PRIOR TO INSTALLATION PS/LADD SYSTEM 2 OUTLET STRUCTURE DETAIL NOT TO SCALE NOTE: CONTRACTOR TO PROVIDE SHOP DRAWINGS TO BOHLER ENGINEERING FOR REVIEW AND APPROVAL PRIOR TO INSTALLATION SECTION B-B M� z w w W u z I.-- Wu WLU W0�w 0Zw W(n �LDI z_7- H Wp Of ~ W < 2 W ; J>z0WcoC rnZ)M<Qz< z U)M W zFF C)z<Q<~C z J 0 � of0 mo OoDwU < Xzc�o < d < 0 O (J W F REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 10/7/2021 CAD I.D.: SWP-0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com -allp-q1ki 6 RYAN YAIJUER Lic. No. 0402056625 ;� 07/01/2022 SHEET TITLE: STORMWATER BMP DETAILS SHEET NUMBER: C-907 N l N r N SYSTEM 2 PLAN VIEW SCALE: 1" = 30' 30 15 7.5 0 30 1"= 30' S a ' REVISION 2 - 07/01/22 z • FIBERGLASS SEPARATION CYLINDER CENTER OF CDs STRUCTURE, AND INLET SCREEN AND SUMP OPENING TOP SLAB ACCESS P (SEE FRAME AND COVER DETAIL) A 7 FLOW c � TOP SLAB ACCESS 72• [18291 I.D. MANHOLESTRUCTURE y MAY, MAX. PLAN VIEW B-B N.T.S. CONTRACTOR TO GROUT TO FINISHED GRADE GRADE FIBERGLASS ` SEPARATION CYLINDER AND INLET r I III II I B INLET PIPE (MULTIPLE INLET PIPES MAY BE ACCOMMODATED) II `N�' OUTLET PIPE PERMANENT POOL ELEV. r � ---- --- m (V OIL BAFFLE •�-I SKIRT I I 1-9" [5331 m SEPARATION ;v SCREEN SOLIDS STORAGE a ELEVATION A -A N.T.S. CDS3020-6-C DESIGN NOTES THE STANDARD CDS3020-6-C CONFIGURATION IS SHOWN. ALTERNATE CONFIGURATIONS ARE AVAILABLE AND ARE LISTED BELOW. SOME CONFIGURATIONS MAY BE COMBINED TO SUIT SITE REQUIREMENTS. CONFIGURATION DESCRIPTION GRATED INLET ONLY (NO INLET PIPE) GRATED INLET WITH INLET PIPE OR PIPES CURB INLET ONLY (NO INLET PIPE) CURB INLET WITH INLET PIPE OR PIPES SEPARATE OIL BAFFLE (SINGLE INLET PIPE REQUIRED FOR THIS CONFIGURATION) SEDIMENT WEIR FOR NJDEP / NJCAT CONFORMING UNITS FRAME AND COVER I(DIAMETER VARIES) B N.T.S. SITE SPECIFIC DATA REQUIREMENTS STRUCTURED WATER QUALITY FLOW RATE (CPS OR US) ` PEAK FLOW RATE (CFS OR US) ' RETURN PERIOD OF PEAK FLOW (YRS) ' SCREEN APERTURE (2400 OR 4700) ` PIPE DATA: I.E. MATERIAL DIAMETER INLET PIPE 1 ' INLET PIPE 2 ' OUTLET PIPE ' RIM ELEVATION ' ANTI -FLOTATION BALLAST WIDTH HEIGHT S/SPECIAL REQUIREMENTS: FENGINEER OF RECORD GENERAL NOTES 1. CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE. 2. DIMENSIONS MARKED WITH () ARE REFERENCE DIMENSIONS. ACTUAL DIMENSIONS MAY VARY. 3. FOR FABRICATION DRAWINGS WITH DETAILED STRUCTURE DIMENSIONS AND WEIGHTS, PLEASE CONTACT YOUR CONTECH ENGINEERED SOLUTIONS LLC REPRESENTATIVE. w .mntwhES.com 4. CDS WATER QUALITY STRUCTURE SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA AND INFORMATION CONTAINED IN THIS DRAWING. 5. STRUCTURE SHALL MEET AASHTO HS20 AND CASTINGS SHALL MEET HS20 (AASHTO M 306) LOAD RATING, ASSUMING GROUNDWATER ELEVATION AT, OR BELOW, THE OUTLET PIPE INVERT ELEVATION. ENGINEER OF RECORD TO CONFIRM ACTUAL GROUNDWATER ELEVATION. 6. PVC HYDRAULIC SHEAR PLATE IS PLACED ON SHELF AT BOTTOM OF SCREEN CYLINDER. REMOVE AND REPLACE AS NECESSARY DURING MAINTENANCE CLEANING. INSTALLATION NOTES A. ANY SUB -BASE, BACKFILL DEPTH, AND/OR ANTI -FLOTATION PROVISIONS ARE SITE -SPECIFIC DESIGN CONSIDERATIONS AND SHALL BE SPECIFIED BY ENGINEER OF RECORD. B. CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFTAND SET THE CDS MANHOLE STRUCTURE (LIFTING CLUTCHES PROVIDED). C. CONTRACTOR TO ADD JOINT SEALANT BETWEEN ALL STRUCTURE SECTIONS, AND ASSEMBLE STRUCTURE. D. CONTRACTOR TO PROVIDE, INSTALL, AND GROUT PIPES. MATCH PIPE INVERTS WITH ELEVATIONS SHOWN. E. CONTRACTOR TO TAKE APPROPRIATE MEASURES TO ASSURE UNIT IS WATER TIGHT, HOLDING WATER TO FLOWLINE INVERT MINIMUM. IT IS SUGGESTED THAT ALL JOINTS BELOW PIPE INVERTS ARE GROUTED. CDS TYPICAL DETAIL PROPOSED LAYOUT PROPOSED ELEVATIONS 'INVERT ABOVE BASE OF CHAMBER 04LAY u sF d PART TYPE FLAMP MANIFOLD ITEM MOV A B DESCRIPTION INSTALL 2 ACCESS ART#: MC720024 A 8" x 18" BOTTOM MANIFOLD. ADS N-12 NVER 1.97"r6STONE MAX FLOW STORMTECH MC-7200 CHAMBERS 472.92 STORMTECH MC-720EEND CAPS 468.4 I d67.9 VOID In IMINI 467'yMANIFOLD C 18" x 18' BOTTOM MANIFOLD. AOS N42 1,97• CONCRETE STRUCTURE D (DE IG BY ENGINEER / VI E Y OTHERS) 8.0 CFS OUTw N56. ( ) OP OF STONE: 466.9 zCONCRETE TOP OF MC-7200 CHAMBER: 465.9 STRUCTURE W/WEIR E (DESIGN BY ENGINEER / PROVIDED BY OTHERS) 11.0 CFS IN (PERIMETER STONE INCLUDED) _I U) J w 4" ISOLATOR ROW PLUS INVERT: 461.11 (COVER STONE INCLUDED) LU j = 24" ISOLATOR ROW PLUS INVERT: 461.11 CONCRETE STRUCTURE WIWEIR F (DESIGN BY ENGINEER I PROVIDED BY OTHERS)Z BASE STONE INCLUDED 18" x 18"BOTTOM MANIFOLD INVERT: 461.0 bY b I tM VtKIML I tR (n) 18" x 18" BOTTOM MANIFOLD INVERT: 461. UNDERDRAIN G 6" ADS N-12 DUAL WALL PERFORATED HOPE UNDERDRAIN O 18" BOTTOM CONNECTION INVERT: 461.0 INSPECTION PORT H AIL 4" SEE DETAIL BOTTOM OF MC-7200 CHAMBER: 460.92 ¢ W U y UNDERDRAIN INVERT: 457.9 E BOTTOM OF STONE 1 457.9 of u a6 13 U D jn of W Q F Q a in d Wp WWI F a� 'r U 150.02' 143,89' z tt W ��G D 0 6S C n q}y� F O `7 ox e /.L�l / /��LLJlLAl L U) .'. ,`;//,/ i!!f%I�/i/!C=J , E - V a m O E g B� mr7 a �j Or la KO� y;B;qq - ISOLATOR ROW PLUS 6 SEE DETAIL dl NOTES PLACE MINIMUM 50 O ADS LUSt 5 OVEN GEOTEXTILE OVER BEDDING FOR MANIFOLD SIZING GUIDANCE. 17. F ADSPLUS175 W A MANIFOLD SIZE TO BE DETERMINED A SITE DESIGN ENGINEER. SEE TECH NOTE DESIGN DUET THE ADAPTATION OF THIS CHAMBER SYSTEM TO SPECIFIC SITE AND DESIGN CONSTRAINTS IT MAY BE NECESSARY T CUT AND COUPLE ADDITIONAL PIPE TO STANDARD MANIFOLD STONE AND UNDERNEATH CHAMBER FEET FOR SCOUR PROTECTION AT ALL O A EO COMPONENTS IN THE FIELD. §.� 0 i 0 z - - ie CHAMBER INLET ROWS ARE MET. • THE SITE DESIGN ENGINEER MUST REVIEW ELEVATIONS AND IF NECESSARY ADJUST GRADING TO ENSURE THE CHAMBER COVER RE UDESIGN 8 THIS CHAMBER SYSTEM WAS DESIGNED WITHOUT SITE -SPECIFIC INFORMATION ON SOIL CONDITIONS OR BEARING CAPACITY. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR E 119. SHEET DETERMINING - -BED LIMITS THE SUITABILITY OF THE SOIL AND PROVIDING THE BEARING CAPACITY OF THE INSITU SOILS. THE BASE STONE DEPTH MAY BE INCREASED OR DECREASED ONCE THIS INFORMATION IS PROVIDED. • NOT FOR CONSTRUCTION: THIS LAYOUT IS FOR DIMENSIONAL PURPOSES ONLY TO PROVE CONCEPT S THE REQUIRED STORAGE VOLUME CAN BE ACHIEVED ON SITE. 2 OF 5 INSTALL FLAMP ON 24" (600 mm) ACCESS PIPE OPTIONAL INSPECTION PORT 04 PART#: MC720024RAMP 2 # COVER PIPE CONNECTION TO END CAP WITH ADS w GEOSYNTHETICS 601T NON -WOVEN GEOTEXTILE MC4200 CHAMBER � Z MC-7200 END CAP ¢ V) Z U1 STORMTECH HIGHLY RECOMMENDS ".y ne w N <3< o U FLEXSTORM INSERTS IN ANY UPSTREAM'♦ry' STRUCTURES WITH OPEN GRATES •SM1 'li 1 0.°'e' 4 �M "ti • sia0.` I� yb �y% Ry t1 }+Sf�.T 8 U + �%y+% sty °ay+ p+>:y�ap.>3+d1+2 .<"•a +. •� `:° ..• °. "'� .L" +:°•R,` as 4'•ar a""+a •a'0.4 ,�: Z o # W O U) U w 0 ii i U) w o a CATCH BASIN OR MANHOLE ,-„% 6 z a 0 SUMP DEPTH TBD BY _ V. w SITE DESIGN ENGINEER O € (24" [600 mm) MIN RECOMMENDED) 24" (B00 mm) HOPE ACCESS PIPE REQUIRED USE ONE LAYER OF ADSPLUS175 WOVEN GEOTEXTILE BETWEEN FACTORY PARTIAL CUT END CAP PART #: FOUNDATION STONE AND CHAMBERS 4 m MC72001EPP248 OR MC72001EPP248W 10.3' (3.1 m) MIN WIDE CONTINUOUS FABRIC WITHOUT SEAMS MC-7200 ISOLATOR ROW PLUS DETAIL I I I N. INSPECTION & MAINTENANCE STEP 1) INSPECT ISOLATOR ROW PLUS FOR SEDIMENT A. INSPECTION PORTS (IF PRESENT) A.I. REMOVE/OPEN LID ON NYLOPLAST INLINE DRAIN A.2. REMOVE AND CLEAN FLEXSTORM FILTER IF INSTALLED A.3, USING A FLASHLIGHT AND STADIA ROD, MEASURE DEPTH OF SEDIMENT AND RECORD ON MAINTENANCE LOG AA LOWER A CAMERA INTO ISOLATOR ROW PLUS FOR VISUAL INSPECTION OF SEDIMENT LEVELS (OPTIONAL) A.5. IF SEDIMENT IS AT, OR ABOVE. r (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. B. ALL ISOLATOR PLUS ROWS B.I. REMOVE COVER FROM STRUCTURE AT UPSTREAM END OF ISOLATOR ROW PLUS B.2. USING A FLASHLIGHT, INSPECT DOWN THE ISOLATOR ROW PLUS THROUGH OUTLET PIPE i) MIRRORS ON POLES OR CAMERAS MAY BE USED TO AVOID A CONFINED SPACE ENTRY H) FOLLOW OSHA REGULATIONS FOR CONFINED SPACE ENTRY IF ENTERING MANHOLE B.3. IF SEDIMENT IS AT. OR ABOVE, r (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. 5I EP 21 CLEAN OUT ISOLATOR ROW PLUS USING THE JETVAC PROCESS A. A FIXED CULVERT CLEANING NOZZLE WITH REAR FACING SPREAD OF 4T (1.1 m) OR MORE IS PREFERRED B. APPLY MULTIPLE PASSES OF JETVAC UNTIL BACKFLUSH WATER IS CLEAN C. VACUUM STRUCTURE SUMP AS REQUIRED STEP 3) REPLACE ALL COVERS, GRATES, FILTERS, AND LIDS: RECORD OBSERVATIONS AND ACTIONS. STEP 4) INSPECT AND CLEAN BASINS AND MANHOLES UPSTREAM OF THE STORMTECH SYSTEM. NOTES 1. INSPECT EVERY 6 MONTHS DURING THE FIRST YEAR OF OPERATION. ADJUST THE INSPECTION INTERVAL BASED ON PREVIOUS OBSERVATIONS OF SEDIMENT ACCUMULATION AND HIGH WATER ELEVATIONS. 2. CONDUCT JETTING AND VACTORING ANNUALLY OR WHEN INSPECTION SHOWS THAT MAINTENANCE IS NECESSARY. CONCRETE( PAVEN CONCRETE SLAB 6" (150 mm) MIN THICKNE STORMTECH CHAMBER 12" (300 mm) MIN WIDTH CONCRETE COLLAR NOT REQUIRED FOR UNPAVED APPLICATIONS W NYLOPLAST INSPECTION PORT BODY (PART# 2706AG41PKM OR TRAFFIC RATED BOX W/SOLID LOCKING COVER 4' (100 mm) SDR 35 PIPE 4' (100 mm) INSERTA TEE TO BE CENTERED ON CORRUGATION VALLEY NOTE: INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION VALLEY. 4" PVC INSPECTION PORT DETAIL (MC SERIES CHAMBER) NTS ISOLATOR ROW TYPICAL DETAIL PROPOSED LAYOUT PROPOSED ELEVATIONS STORMTECH MC-7200 CHAMBERS 478.0 PART TYPE YOU DESCRIPTION 87068 (PERIMETER STONE INCLUDED) TOP OF MC-7200 CHAMBER: 471p UUNUHtlt a KUUIUnt t walvcaury of ovvnvccrv�rnvvvcv of vin (COVER STONE INCLUDED) 24" z 24" BOTTOM MANIFOLD INVERT: 466.1 CONCRETE STRUCTURE F (DESIGN BY ENGINEER / PROVIDED BY OTHERS) BASE STONE INCLUDED 4"x 24'BOTTOMMANIFOLDINVERT: 466.1 WIWEIR 165915Yb I hM AREA (F) 4° x 24' BOTTOM MANIFOLD INVERT: 466.1 CONCRoETE STRUCTURE G (DESIGN 8Y ENGINEER /PROVIDED BY OTHERS) ISOLATOR ROW PLUS SEE DETAIL PLACE MINIMUM 17.50' OF ADSPLUS175 WOVEN GEOTEXTILE OVER BEDDING STONE AND UNDERNEATH CHAMBER FEET FOR SCOUR PROTECTION AT ALL CHAMBER INLET ROWS BED LIMITS 0 6' JO F Zpn o J Y 2 J O 5� EF u� SHEET 4OF5 )F CHAMBER L' MAX FLOW S Fw- 4 n rcS nI IT I `4 i t 41.5 CFS IN 19.0 CFS IN 0a U �F A w kw B I I__ �-_ �_ I F _ - .- _ v E-IT z d w 3 = F jI F 0 E 9 ON pW 0Y <_< F j 66�y ¢p¢n o-g QJp] N V ESE '^ x 51ZE TO BE DETERMINED SITE DESIGN ENGINEER. SEE TECH NOTE FOR MANIFOLD SIZING GUIDANCE. y' �m AD CONSTRAINTS. IT MAY BE NECESSARY TO CUT AND COUPLE ADDITIONAL PIPE TO STANDARD MANIFOLD ADAPTATION OF THIS CHAMBER SYSTEM TO SPECIFIC SITE AND DESIGN THE FIELD. -SIGN ENGINEER MUST REVIEW ELEVATIONS AND IF NECESSARY ADJUST GRACING TO ENSURE THE CHAMBER COVER REQUIREMENTS ARE MET. _ 3ER SYSTEM WAS DESIGNED WITHOUT SITE -SPECIFIC INFORMATION ON SOIL CONDITIONS OR BEARING CAPACITY. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR SHEET OF THE SOIL AND PROVIDING THE BEARING CAPACITY OF THE INSITU SOILS. THE BASE STONE DEPTH MAY BE INCREASED OR DECREASED ONCE THIS INFORMATION IS I CONSTRUCTION: THIS LAYOUT IS FOR DIMENSIONAL PURPOSES ONLY TO PROVE CONCEPT 6 THE REQUIRED STORAGE VOLUME CAN BE ACHIEVED ON SITE. F2 OF 5 SYSTEM 1 id Z SS of of R UJ w CID Z w ti E_ of W��w��m Wz ;ZWWVJ;W $ z 0t=o of CO wZ g§ Fw2x >zUwvJO 7 2Q Q Q oW <W o mej(n Z Z U)2 Ed z p: H how OZ�QFF0 &Q0. U) J�Cn of U) Q Z Z 0L Q s a of >_ U wm O H �& CID zW s s� oa REVISIONS REV DATE COMMENT Dm"Br er CSECxeD 1 05/18/22 COUNTY COMMENTS PCM RTY 2 07/01/22 COUNTY COMMENETS PCM 15 Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 10/7/2021 CAD I.D.: SWP-0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com rv4ALTH en. RVAN YAUUER Lic. No. 0402056625 ;� 07/01/2022 SHEET TITLE: STORMWATER BMP DETAILS SHEET NUMBER: C-908 SYSTEM 2 REVISION 2 - 07/01/22 PROJECT INFORMATION ENGINEERED PRODUCT MANAGER ADS SALES REP PROJECT NO. 1�"w Advanced Drainage Systems, Inc. RST RESIDENCES - SYSTEM 1 CHARLOTTESVILLE, VA MC-7200 STORMTECH CHAMBER SPECIFICATIONS 1. CHAMBERS SHALL BE STORMTECH MC-7200. 2, CHAMBERS SHALL BE ARCH -SHAPED AND SHALL BE MANUFACTURED FROM VIRGIN, IMPACT -MODIFIED POLYPROPYLENE COPOLYMERS. 3. CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" CHAMBER CLASSIFICATION 60001. 4. CHAMBER ROWS SHALL PROVIDE CONTINUOUS, UNOBSTRUCTED INTERNAL SPACE WITH NO INTERNAL SUPPORTS THAT WOULD IMPEDE FLOW OR LIMIT ACCESS FOR INSPECTION. 5. THE STRUCTURAL DESIGN OF THE CHAMBERS, THE STRUCTURAL BACKFILL, AND THE INSTALLATION REQUIREMENTS SHALL ENSURE THAT THE LOAD FACTORS SPECIFIED IN THE AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS, SECTION 12.12. ARE MET FOR: 1) LONG -DURATION DEAD LOADS AND 2) SHORT -DURATION LIVE LOADS, BASED ON THE AASHTO DESIGN TRUCK WITH CONSIDERATION FOR IMPACT AND MULTIPLE VEHICLE PRESENCES. 6. CHAMBERS SHALL BE DESIGNED, TESTED AND ALLOWABLE LOAD CONFIGURATIONS DETERMINED IN ACCORDANCE WITH ASTM F2787, 'STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS'. LOAD CONFIGURATIONS SHALL INCLUDE: 1) INSTANTANEOUS (0 MIN) AASHTO DESIGN TRUCK LIVE LOAD ON MINIMUM COVER 2) MAXIMUM PERMANENT (75-YR) COVER LOAD AND 3) ALLOWABLE COVER WITH PARKED (1-WEEK) AASHTO DESIGN TRUCK. 7. REQUIREMENTS FOR HANDLING AND INSTALLATION: • TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. • TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 3". • TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT SHALL BE GREATER THAN OR EQUAL TO 450 LBS/FTPA. THE ASC IS DEFINED IN SECTION 6.2.8 OF ASTM F2418. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73" F 123- C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS. 8. ONLY CHAMBERS THAT ARE APPROVED BY THE SITE DESIGN ENGINEER WILL BE ALLOWED. UPON REQUEST BY THE SITE DESIGN ENGINEER OR OWNER, THE CHAMBER MANUFACTURER SHALL SUBMIT A STRUCTURAL EVALUATION FOR APPROVAL BEFORE DELIVERING CHAMBERS TO THE PROJECT SITE AS FOLLOWS: • THE STRUCTURAL EVALUATION SHALL BE SEALED BY A REGISTERED PROFESSIONAL ENGINEER, • THE STRUCTURAL EVALUATION SHALL DEMONSTRATE THAT THE SAFETY FACTORS ARE GREATER THAN OR EQUAL TO 1.95 FOR DEAD LOAD AND 1.75 FOR LIVE LOAD, THE MINIMUM REQUIRED BY ASTM F2787 AND BY SECTIONS 3 AND 12.12 OF THE AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS FOR THERMOPLASTIC PIPE. • THE TEST DERIVED CREEP MODULUS AS SPECIFIED IN ASTM F2418 SHALL BE USED FOR PERMANENT DEAD LOAD DESIGN EXCEPT THAT IT SHALL BE THE 75-YEAR MODULUS USED FOR DESIGN. 9. CHAMBERS AND END CAPS SHALL BE PRODUCED AT AN ISO 9001 CERTIFIED MANUFACTURING FACILITY. -1122M)SJ!W COVER PIPE CONNECTION TO END CAP WITH ADS GEOSYNTHETICS 601T NON -WOVEN GEOTEXTILE STORMTECH HIGHLY RECOMMENDS f� FLEXSTORM INSERTS IN ANY UPSTREAM STRUCTURES WITH OPEN GRATES CATCH BASIN OR MANHOLE SUMP DEPTH TBD BY SITE DESIGN ENGINEER (24" (600 mml MIN RECOMMENDED) INSPECTION & MAINTENANCE STEP 1) INSPECT ISOLATOR ROW PLUS FOR SEDIMENT A SIteASSISf FOR STORMTECH INSTALLATION INSTRUCTIONS VISIT OUR APR IMPORTANT - NOTES FOR THE BIDDING AND INSTALLATION OF MC-7200 CHAMBER SYSTEM 1. STORMTECH MC-7200 CHAMBERS SHALL NOT BE INSTALLED UNTIL THE MANUFACTURER'S REPRESENTATIVE HAS COMPLETED A PRE -CONSTRUCTION MEETING WITH THE INSTALLERS. 2. STORMTECH MC-7200 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-7200 CONSTRUCTION GUIDE". 3. CHAMBERS ARE NOT TO BE BACKFILLED WITH A DOZER OR EXCAVATOR SITUATED OVER THE CHAMBERS. STORMTECH RECOMMENDS 3 BACKFILL METHODS: • STONESHOOTER LOCATED OFF THE CHAMBER BED. • BACKFILL AS ROWS ARE BUILT USING AN EXCAVATOR ON THE FOUNDATION STONE OR SUBGRADE • BACKFILL FROM OUTSIDE THE EXCAVATION USING ALONG BOOM HOE OR EXCAVATOR. 4. THE FOUNDATION STONE SHALL BE LEVELED AND COMPACTED PRIOR TO PLACING CHAMBERS, 5. JOINTS BETWEEN CHAMBERS SHALL BE PROPERLY SEATED PRIOR TO PLACING STONE. C MAINTAIN MINIMUM -9' (230 mm) SPACING BETWEEN THE CHAMBER ROWS. 7. INLET AND OUTLET MANIFOLDS MUST BE INSERTED A MINIMUM OF 12" (300 mm) INTO CHAMBER END CAPS. 8. EMBEDMENT STONE SURROUNDING CHAMBERS MUST BE A CLEAN, CRUSHED, ANGULAR STONE MEETING THE AASHTO M43 DESIGNATION OF #3 OR #4. 9. STONE SHALL BE BROUGHT UP EVENLY AROUND CHAMBERS SO AS NOTTO DISTORT THE CHAMBER SHAPE. STONE DEPTHS SHOULD NEVER DIFFER BY MORE THAN 12" (300 mm) BETWEEN ADJACENT CHAMBER ROWS. 10. STONE MUST BE PLACED ON THE TOP CENTER OF THE CHAMBER TO ANCHOR THE CHAMBERS IN PLACE AND PRESERVE ROW SPACING. 11. THE CONTRACTOR MUST REPORT ANY DISCREPANCIES WITH CHAMBER FOUNDATION MATERIAL BEARING CAPACITIES TO THE SITE DESIGN ENGINEER. 12. ADS RECOMMENDS THE USE OF "FLEXSTORM CATCH IT INSERTS DURING CONSTRUCTION FOR ALL INLETS TO PROTECT THE SUBSURFACE STORMWATER MANAGEMENT SYSTEM FROM CONSTRUCTION SITE RUNOFF. NOTES FOR CONSTRUCTION EQUIPMENT 1. STORMTECH MC-7200 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-7200 CONSTRUCTION GUIDE". 2. THE USE OF EQUIPMENT OVER MC-7200 CHAMBERS IS LIMITED: • NO EQUIPMENT IS ALLOWED ON BARE CHAMBERS. • NO RUBBER TIRED LOADER DUMP TRUCK OR EXCAVATORS ARE ALLOWED UNTIL PROPER FILL DEPTHS ARE REACHED IN ACCORDANCE WITH THE "STORMTECH MC-35001MC-7200 CONSTRUCTION GUIDE". • WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT CAN BE FOUND IN THE "STORMTECH MC-7200 CONSTRUCTION GUIDE". 3, FULL 36" (900 mm) OF STABILIZED COVER MATERIALS OVER THE CHAMBERS IS REQUIRED FOR DUMP TRUCK TRAVEL OR DUMPING. USE OF A DOZER TO PUSH EMBEDMENT STONE BETWEEN THE ROWS OF CHAMBERS MAY CAUSE DAMAGE TO CHAMBERS AND IS NOT AN ACCEPTABLE BACKFILL METHOD. ANY CHAMBERS DAMAGED BY USING THE "DUMP AND PUSH" METHOD ARE NOT COVERED UNDER THE STORMTECH STANDARD WARRANTY. CONTACT STORMTECH AT 1-888-892-2694 WITH ANY QUESTIONS ON INSTALLATION REQUIREMENTS OR WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT, INSTALL FLAMP ON 24" (800 mm) ACCESS PIPE PART#: MC720024RAMP MC-7200 CHAMBER 24" (600 mm) HOPE ACCESS PIPE REQUIRED USE FACTORY PARTIAL CUT END CAP PART #: MC72001EPP24B OR MC72001EPP246W MC-7200 ISOLATOR ROW PLUS DETAIL A. INSPECTION PORTS (IF PRESENT) A. 1. REMOVE/OPEN LID ON NYLOPLAST INLINE DRAIN A.2. REMOVE AND CLEAN FLEXSTORM FILTER IF INSTALLED A.3, USING A FLASHLIGHT AND STADIA ROD, MEASURE DEPTH OF SEDIMENT AND RECORD ON MAINTENANCE LOG AA LOWER A CAMERA INTO ISOLATOR ROW PLUS FOR VISUAL INSPECTION OF SEDIMENT LEVELS (OPTIONAL) A.S. IF SEDIMENT IS AT, OR ABOVE. 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. B. ALL ISOLATOR PLUS ROWS B.I. REMOVE COVER FROM STRUCTURE AT UPSTREAM END OF ISOLATOR ROW PLUS B.2. USING A FLASHLIGHT, INSPECT DOWN THE ISOLATOR ROW PLUS THROUGH OUTLET PIPE i) MIRRORS ON POLES OR CAMERAS MAY BE USED TO AVOID A CONFINED SPACE ENTRY 5) FOLLOW OSHA REGULATIONS FOR CONFINED SPACE ENTRY IF ENTERING MANHOLE 3.3. IF SEDIMENT IS AT. OR ABOVE, r (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. STEP 2) CLEAN OUT ISOLATOR ROW PLUS USING THE JENAC PROCESS A. A FIXED CULVERT CLEANING NOZZLE WITH REAR FACING SPREAD OF 45" (1.1 m) OR MORE IS PREFERRED B. APPLY MULTIPLE PASSES OF JET7AC UNTIL BACKPLUSH WATER IS CLEAN C. VACUUM STRUCTURE SUMP AS REQUIRED STEP 3) REPLACE ALL COVERS, GRATES, FILTERS, AND LIDS; RECORD OBSERVATIONS AND ACTIONS. STEP 4) INSPECT AND CLEAN BASINS AND MANHOLES UPSTREAM OF THE STORMTECH SYSTEM. NOTES 1. INSPECT EVERY 6 MONTHS DURING THE FIRST YEAR OF OPERATION. ADJUST THE INSPECTION INTERVAL BASED ON PREVIOUS OBSERVATIONS OF SEDIMENT ACCUMULATION AND HIGH WATER ELEVATIONS. 2 CONDUCT JETTING AND VACTORING ANNUALLY OR WHEN INSPECTION SHOWS THAT MAINTENANCE IS NECESSARY. CONCRETEC PAVEM CONCRETE SLAB 6" (150 mm) MIN THICKNE: STORMTECH CHAMBER OPTIONAL INSPECTION PORT MC-7200 END CAP ONE LAYER OF ADSPLUS175 WOVEN GEOTEXTILE BETWEEN FOUNDATION STONE AND CHAMBERS 10.3' (3.1 m) MIN WIDE CONTINUOUS FABRIC WITHOUT SEAMS )NCRETE COLLAR NOT REQUIRED IR UNPAVED APPLICATIONS W NYLOPLAST INSPECTION PORT BODY (PART# 270aAG41PKFT) OR TRAFFIC RATED BOX W/SOLID LOCKING COVER 4' (100 mm) SDR 35 PIPE 4" (100 mm) INSERTA TEE TO BE CENTERED ON CORRUGATION VALLEY NOTE: INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION VALLEY. 4" PVC INSPECTION PORT DETAIL (MC SERIES CHAMBER) NTS N LU F z "- } > W L) O U Z i BE ° W 0 3 � s � s oe Q8 J N ¢ Zen ow O^ e axS. a- a 9� it E� SHEET 4OF5 ACCEPTABLE FILL MATERIALS: STORMTECH MC-7200 CHAMBER SYSTEMS AASHTO MATERIAL MATERIAL LOCATION DESCRIPTION COMPACTION / DENSITY REQUIREMENT CLASSIFICATIONS FINAL FILL: FILL MATERIAL FOR LAYER'D' STARTS FROM THE PREPARE PER SITE DESIGN ENGINEER'S PLANS. PAVED D TOP OF THE'C' LAVER TO THE BOTTOM OF FLEXIBLE ANY SOIUROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS. NIA INSTALLATIONS MAY HAVE STRINGENT MATERIAL AND PAVEMENT OR UNPAVED FINISHED GRADE ABOVE, NOTE THAT CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS. PREPARATION REQUIREMENTS. D' PAVEMENT SUBBASE MAY BE PART OF THE'LAYER AASHTO M145' INITIAL FILL: FILL MATERIAL FOR LAYER'C' STARTS FROM THE GRANULAR WELL -GRADED SOIUAGGREGATE MIXTURES, Gf.5% FINES OR A-1, A-24, A-3 BEGIN COMPACTIONS AFTER 24" (6DO mm) OF MATERIAL OVER TOP OF THE EMBEDMENT STONE IS' LAYER) TO 24" (600 mm) PROCESSED AGGREGATE, THE CHAMBERS IS REACHED. COMPACT ADDITIONAL LAYERS IN L ABOVE THE TOP OF THE CHAMBER. NOTE THAT PAVEMENT OR 12' (300 mm) MAX LIFTS TO A MIN. 95%PROCTOR DENSITY FOR SUBBASE MAY BE A PART OF THE'C' LAYER. MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THIS WELL GRADED MATERIAL AND 95% RELATIVE DENSITY FOR LAYER. AASHTO M43' PROCESSED AGGREGATE MATERIALS. 3, 357, 4, 467, 5. 56, 57, 6, 67, 68, 7, 78, 8, 89, 9. 10 EMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS AASHTO M43' B FROM THE FOUNDATION STONE ('A' LAYER) TO THE 'C' LAYER CLEAN, CRUSHED, ANGULAR STONE 3.4 NO COMPACTION REQUIRED. ABOVE. A FOUNDATION STONE: FILL BELOW CHAMBERS FROM THE CLEAN, CRUSHED, ANGULAR STONE AASHTO M43' PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE.23 SUBGRADE UP TO THE FOOT (BOTTOM) OF THE CHAMBER. 3.4 PLEASE NOTE: 1. THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR. FOR EXAMPLE, A SPECIFICATION FOR #4 STONE WOULD STATE: 'CLEAN, CRUSHED, ANGULAR NO. 4 (AASHTO M43) STONE'. 2. STORMTECH COMPACTION REQUIREMENTS ARE MET FORA' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 9" (230 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR. 3. WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS. A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION EQUIPMENT. FOR SPECIAL LOAD DESIGNS- CONTACT STORMTECH FOR COMPACTION REQUIREMENTS. 4. ONCE LAYER'C' IS PLACED. ANY SOIUMATERIAL CAN BE PLACED IN LAYER IY UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OF LAYER 'C' OR'D' AT THE SITE DESIGN ENGINEER'S DISCRETION, PERIMETER STONE (SEE NOTE 4) EXCAVATION WALL (CAN BE SLOPED OR VERTICAL) 12"(30 ADS GEOSYNTHETICS 601T NON -WOVEN GEOTEXTILE ALL AROUND CLEAN. CRUSHED, ANGULAR STONE IN A 8 B LAYERS &A • SUBGRADE SOILS (SEE NOTE 3) PAVEMENT LAYER (DESIGNED BY SITE DESIGN ENGINEER) i06p1TOM pF FlF%ISLE PI,VEMENT FOR UNPAVED UATIONS WHERE RU1TM FROM VEHICLES WY OCCUR. 7.O' INCREASE GOVFR TO JO'11'A mml 24' (21 m) (600 mm) MIN' MAX 12" (300 mm) MIN L 80" (1525 mm) DEPTH OF STONE TO BE DETERMINED I _ �Ti�I (• ,7j� 1 ICJ �J „JII BY SITE DESIGN ENGINEER 9" (230 rI MIN 10001""((2540 mm) 12'(300 mm) MIN (230 MM) MIN NOTES: 1 CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418. "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" CHAMBER CLASSIFICATION 6OX101 2. MC-7200 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS", 3, THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITH CONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURE CONDITIONS. 4. PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS. 5. REQUIREMENTS FOR HANDLING AND INSTALLATION: • TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. • TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 3'. • TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION. a) THE ARCH STIFFNESS CONSTANT SHALL BE GREATER THAN OR EQUAL TO 450 LBS/FT/%. THE ASC IS DEFINED IN SECTION 6.2.8 OF ASTM F2418. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73" F / 23' C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS. UNDERDRAIN DETAIL TUTS STORMTECH CHAMBER RMTECH END CAP 'LET MANIFOLD FOUNDATION, STONE BENEATH CHAMBERS ADS GEOSYNTHETICS601T NON -WOVEN GEOTEXTILE STORMTECH END CAP FOUNDATION STONE BENEATH CHAMBERS ADS GEOSYNTHETIC7 S601T NON -WOVEN GEOTEXTILE .. -ITE DESIGN ENGINEER 4' (100 mm) TYP FOR SC-310 8 SC,16OLP SYSTEMS 6" (150 mm) TYP FOR SC-740, DC-780. MC-3500, MC-4500 8 MC-7200 SYSTEMS MC -SERIES END CAP INSERTION DETAIL 12" (300 mm) MIN INSERTION MANIFOLD STUB MANIFOLD HEADER 12" (300 mm) MIN SEPARATION STORMTECH END CAP L 12'(300 mm) III"` MIN INSERTION NOTE: MANIFOLD STUB MUST BE LAID HORIZONTAL FOR A PROPER FIT IN END CAP OPENING. WALL :GRATED ERDRAIN SECTION B-B 7 (20 INV MC-7200 TECHNICAL SPECIFICATION NTS VALLEY STIFFENING RIB LOWER JOINT CORRUGATION 1m) CREST WEB UPPER JOINT CORRUGATION CREST STIFFENING RIB 40 BUILD ROW IN THIS DIRECTION ` FOOT 6D.0" ' 32.8" (1524 mm) 61.0' (833 MM) (1 m) INSTALLED %I AR-1 100.0' (2540 mm) 90.0" (2286 mm) NOMINAL CHAMBER SPECIFICATIONS SIZE (W X H X INSTALLED LENGTH) 100.0' X 60.0" X 79.1" (2540 mm X 1524 mm X 2010 mm) CHAMBER STORAGE 175.9 CUBIC FEET (4.98 W) MINIMUM INSTALLED STORAGE' 267.3 CUBIC FEET (7.56 W) WEIGHT (NOMINAL) 205 tbs. (92.9 kg) NOMINAL END CAP SPECIFICATIONS 3_ SIZE (W X H X INSTALLED LENGTH) 90.0" X 61.0" X 32.8" (2286 mm X 1549 mm X 833 mm) (965 END CAP STORAGE 39.5 CUBIC FEET (1.12 m>) MINIMUM INSTALLED STORAGE" 115.3 CUBIC FEET (3.26 W) WEIGHT (NOMINAL) 90 tbs, (40.8 kg) 'ASSUMES 12" (305 mm) STONE ABOVE, V (229 mm) STONE FOUNDATION AND BETWEEN CHAMBERS, 12" (305 mm) STONE PERIMETER IN FRONT OF END CAPS AND 40% STONE POROSITY. 12'(300 mm) MIN SEPARATION PARTIAL CUT HOLES AT BOTTOM OF END CAP FOR PART NUMBERS ENDING WITH "B" PARTIAL CUT HOLES AT TOP OF END CAP FOR PART NUMBERS ENDING WITH T END CAPS WITH A PREFABRICATED WELDED STUB END WITH 9M MANIFOLD HEADER MANIFOLD STUB PART # STUB B C MC72001EPP06T 6" (150 mm) 42'54' (1D81 mm) - MC72001EPP06B - 0.86" (22 mm) MC72001EPP08T 8" (200 mm) 40.50' (1D29 mm) - MC72001EPP08B - 1.01" (26 mm) MC72001EPP10T 10" (250 mm) 38.37" (975 mm) - MC72001EPPi0B MG72001EPP12T (300 mm) 35.69" (907 mm)12" MC72001EPP12B - M072001EPPi 5T (375 mm) 32J2"(631 mm)15" MC72001EPP15B - M(43 MC72001EPP18T28.36'(746 mm)MC72001EPP18TW18"(450mm)MC72001EPP188MC7200IEPP18BW MC72001EPP24T 24' (600 mm) 23.05" (585 mm) - MC72001EPP24T W MC72001EPP248 2.28'(67 mm) MC72001EPP24BW MC72001EPP3013W 30'(750mm) -- 2.95"(75 mm) MC72001EPP36BW 36' (900 mm) -- 3.25" (83 mm), MC72001EPP42BW 42" (1050 mm) --- 3.55" (90 mm) NOTE: ALL DIMENSIONS ARE NOMINAL UU UU j W a w w W N U �' o � Z p z Da LU U s Of g X �m J � m OJ Zen ax^ IIL,On MajA r�^ J J ex� SHEET 3OF5 N UJ F a Uj N , i UU m ° Z o IJU 9 x LLI O of u II - co r Qm J � mn L Ze axe wO^ Maio n CUSTOM PREFABRICATED INVERTS o - ARE AVAILABLE UPON REQUEST. = m INVENTORIED MANIFOLDS INCLUDE 12-24" (300-600 mm) SIZE ON SIZE AND 15.48' (375-1200 mm) ECCENTRIC MANIFOLDS, CUSTOM INVERT LOCATIONS ON THE MC-7200 END CAP CUT IN THE FIELD ARE NOT RECOMMENDED FOR PIPE SIZES GREATER THAN 10' (250 mm). THE INVERT LOCATION IN COLUMNS' ARE THE HIGHEST POSSIBLE FOR SHEET THE PIPE SIZE. 50F5 W U) F W ZL.IF-(DL L LL.I� Z W W N W W Q 2 0 W Z J>Z(Jw(7)0 �»WaQZQ Z F H )ZO a< 0 IL J 0 0 W Z Z o Q a.J REVISIONS REV DATE COMMENT oxnwNsv cxecxeo BY 1 05/18/22 COUNTY COMMENTS PCM RTY 2 07/01/22 COUNTY COMMENETS PCM 1 Know what§ below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AN DIOR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V 192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 101712021 CAD I.D.: SWR-0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA 22911 ALBEMARLE COUNTY, VA BOHLER p1 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA 23236 Phone: (804)893-8200 VA@BohlerEng.com .G.ALTH Aw Lic. No. 0402056625 07/01/2022 SHEET TITLE: STORMWATER BMP DETAILS SHEET NUMBER: C-909 REVISION 2 - 07/01/22 Section 6. Pollution Prevention Plan. (reference County Code 17-404 and State Regulation 9VAC25-880-70 part II section A.4) A. Plan showing pollution activities and prevention practices (Provide a reduced I Ix17 copy of a site plan on which all of the following activity locations are clearly marked. Keep this plan up-to-date with ongoing site changes and inspections.) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County 1 � 1 1 � / I I 1 1 1 I 1 I I I I 1 I / / / � 1 / I 1 I 1 / / 1 I / 1 I I I i \ � l n N I N , N s1 / MATC_ H_L I N E - SHEETC-601 TP i SF 498 ------------------- / I I' � i/I / ��u A V--ate-. �•= I _ _ I _ DC I\ \ - I CWP I - _ \ 466 P.O. COc. \ \ C= 0•60 OF 1d_VE-PCO EASEMENT / A-- DC - -_OB. 466 PG: 494 _ -------------------------- 1 �LANOS N/F TP uy \ \ _ == _ '" /� ✓ /'�\, ERA (tgR) .�` \\ COMMON*EAZTH <oo\,D.B. 063 OE D_ = 1�✓FR %-;" /,BEXI wm� lD4"" ST3A ----------P-------- Oh PU29 EO UN/ U�V - I USE. �\ 22' 60k GRa \ O \ r GRATE INC BRJ o �\ RIM= .14 \ INV A 4 39 INV B 2 �\ I I P 25 LF. -18" CMP WAT gib\ o 01\ CLEAN ER PIPE 0 \,\ rk I` C= 0.60 a\ SF I I I l F I \ 1 ' Doi I \\ // AREA = 1.70 A . ------- C= i PROP. WET STORAGE ��/��— --__ ,_pl, ��qqq E PROK COC �y,J ELEVATION: 473 r/n' , - LEVROP.WETST6RAGE �1 1„ � d� ST 3B 494 POO ESMT ' �Ti n DC / 1 RKE 0; (TBVJ U R ELEVATION: 474 TS . / 1 I 472 AREA 1.65 AG. / q12 T 3 I 31' / 111 C= 0.60 i � � I C 1 /CIPI N I E DU STE \ \ W C7 T-3�� / _ Nf4 wr —HAZARDOUS II it F \ 111 DC MATERIALS STORAGE \ AREA IV O474 1 ' APPROX LOC�— 1 IP C= 0.60 ? OF 10' VEPCD EASE/jlENT ` % D.B. 466 PC. 494 (TbVJLU C dG S, SOLVEN ILL AREA TO ENSURE J WASTE WATER OF DRAINAGE TO ST-3A N AREA AM NI ES J / - l _l \ ' Qz VEHICLE FUELING AREA I AND SPILL CONTAINMENT I � q STAGING AREA. RAIN GAUGE,BPORTABLE RK E TOILETS 1-� _ / 'V� 1 �Tglo / NCRETE WASHOUT AREA ------- Il \y�� / APPROW I OF10'lE,P0 EASE P.B. 46B;P6. 494 5 �\\ X wv I ; TS ram\ X - -IT \ PRIVA ROADWAY (TBR� v � 7f — 1 Ilk \`\ ASPNALi� EX \ FX ---------- --- W------ AGE 1 ROP ET _ __ELEVATION: 467 i DC T I 47D _- y� it 470- \ i DC OF 10' VEPCO i \ \ I I V �,D.9.. 466 Pc 4 C= 0.60 vv v i Ts I ( PED. (TB� /4 CWP 28' AREA = 0.24 AC. PIP / TP s ----- ASHLANO COMMON AREA f Old I 1 V0 0 `oo --- a TP o SF o � � o \ \ x Er AS 11 MH \ 47250 TPV /N = 46381 moo v /NV OUT = 46971 EX 2o:S4N ESMT EX 9" SANITARY \ EX Mh APPROX ZX4T/ON PER AS BU/CT \ PROVIDED BY ROUOA8615/1 GAZE & ASSOC, INC T/TZEDI ASHZAND TOWNHOUSES AS BU/CT WATER` ZINE AND SANMARY SEl!'ER" ?o \ DATED 1012911994 RZY/SED 01/09/1995� o EX AS- Mf � R/M = 46709 HATCH LEGEND MANAGED SLOPES PRESERVED SLOPES PRESERVED SLOPE FIELD -VERIFIED <25%PER SLOPE PERCENTAGE EXHIBIT VIRGINIA UNIFORM CODING SYSTEM FOR EROSION AND SEDIMENT CONTROL PRACTICES NO. TITLE KEY SYMBOL SAFETY FENCE E TEMPORARYSTONE CONSTRUCTION ENTRANCE 1 j j� 3.05 SILT FENCE Sr X X- 3.07STORM DRAIN INLET PROTECTION Ir 3.08 CULVERT INLET PROTECTION Clr 3.09 TEMPORARY DIVERSION 3.13 TEMPORARY SEDIMENT TRAP S I 3.14 TEMPORARY SEDIMENT BASIN SB 3.18 OUTLET PROTECTION Or 3.31 TEMPORARY SEEDING TJ TS 3.38 TREE AND PRO ECTIONION Tr TP 3.39 DUST CONTROL 30 15 7.5 0 30 1 "= 30' U Nz LL W W F S W (/ z u Wz Wlgw �zWw� ju zrCD�0 W, ~ W < 2 W >zUWv5C U) 7 m< Q Z< zu)M W ZPF �z < - L, < J W zcf) 0 a< a J o O U W H REVISIONS REV DATE COMMENT 1 05/18/22 COUNTY COMMENTS 2 07/01/22 COUNTY COMMENETS Know what's below. Call before you dig. ALWAYS CALL 811 It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION THIS DRAWING IS INTENDED FOR MUNICIPAL AND/OR AGENCY REVIEW AND APPROVAL. IT IS NOT INTENDED AS A CONSTRUCTION DOCUMENT UNLESS INDICATED OTHERWISE. PROJECT No.: V192076 DRAWN BY: MEG / PM CHECKED BY: RTY DATE: 1017/2021 CAD I.D.: OAP- 0 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR RST RESIDENCES PROPOSED LOCATION: SEMINOLE TRAIL AND ASHWOOD BLVD. CHARLOTTESVILLE, VA22911 ALBEMARLE COUNTY, VA BOHLERI 9100 ARBORETUM PKWY, SUITE 360 RICHMOND, VIRGINIA23236 Phone: (804)893-8200 VA@BohlerEng.com _0110.a kmv e.. RTAN YAUUER Lic. No. 0402056625 6, 07/01/2022 j SHEET TITLE: EROSION AND SEDIMENT CONTROL PLAN PHASE IA SHEET NUMBER C-602 REVISION 2 - 07/01/22 B. Sources of Pollutants, locations, and prevention practices Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures below C. Sources of Pollutants, continued. Common activities and minimum control and prevention ractices Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Follow Erosion and Sediment Control Clearing, grading, excavating, and on- Land disturbance area Plan. Dispose of clearing debris at stabilized areas acceptable disposal sites. Seed and mulch, or sod within 7 da s of land clearing Cover stem drain inlets and use drip Paving operations Roads and driveways pans and absorbentloil dry for all paving machines to limit leaks and spills Direct concrete wash water into a leak - Concrete washout Current location and detail shown proof container or leak -proof settling and cement waste on plan basin that is designed so that no overflows can occur Enclose or cover material storage areas. Mix paint indoors in a containment area or Structure construction, stucco, Structures in a flat unpaved area. Prevent the painting, and cleaning discharge of soaps, solvents, detergents and wash water, paint, form release oils and curing compounds. Water shall be filtered, settled or similarly Dewatering operations Dewatering sites shown on plan treated prior to discharge as shown on plan. Designated areas for material delivery Material delivery and storage Designated area shown on plan and storage. Placed near construction entrances, away from waterways and drainage paths Material use during building process Building areas Follow manufacturer's instructions . MSDS's attached, waste collection area will not receive a substantial amount of runoff from upland Solid waste disposal Current designated container areas areas and does not drain directly to a on plan waterway. Containers have lids covered before periods of rain, or are in a covered area. Scheduled collection to prevent Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures overfilling. MATERIALS NOT TO BE BURIED ON -SITE Convenient and well -maintained portable sanitary facilities will be Sanitary waste Current locations shown on plan provided, and located away from waterways or inlets. Such facilities shall be regularly maintained. Apply fertilizers in accordance with Landscaping operations Landscape areas shown on plan manufacturer's recommendations and not during rainfall events To be treated in a sediment basin or Wash Waters Wash areas shown on plan better control as specified on plan. Minimize the discharge of pollutants from equipment and vehicle washing Vehicle and equipment washing Designated areas and details shown on Provide containment and filtering for all plan wash waters per the plan Minimization of exposure to precipitation and stormwater. Minimize the exposure of building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials present on the site to precipitation and to stormwater. (Identify all non-stormwater discharges to occur on your site. Keep this plan up-to-date with ongoing site changes and inspections. See CGP, 9VAC25-880-70 section E for examples of non-stormwater discharges.) I13 Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County E. Persons responsible for pollution prevention practices (Provide the names and contact information for all persons responsible for prevention practices as listed above.) lex Mays (RST Development, LLC) F. Response and reporting practices Minimize discharges from spills and leaks. Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures as follows. Respond to all spills, leaks and discharges as follows, Report all spills, leaks and discharges as follows, (Provide detailed response and reporting practices according to 9VAC25-880-70, Part II, section A.4.e.) G. Pollution Prevention Awareness (Describe training and procedures to provide awareness and compliance for all measures in this document; waste management, wash waters, prevention measures, etc.) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County F. Response and reportin¢ practices 1. Stormwater Management/BMP's (1) The project proposes BMP's and SWM facilities to meet the water quality requirements of the subject property. BMP's and SWM facilities include three (3) Contech CDS Hydrodynamic Separators, two (2) ADS Isolator Rows, and two (2) underground vaults. These are proposed to meet state and local regulations. See Appendix E, Site Plan Excerpts for details. 2. Other Controls (1) No solid materials, including building materials, garbage and debris shall be discharged to surface waters of the State, except as authorized by a Clean Water Act §404 permit. (2) Where construction vehicle access routes intersect paved public and private roadways, provisions will be made to minimize the transport of sediment by vehicular tracking onto the paved surface. Where sediment is transported onto a road surface, the road will be cleaned thoroughly at the end of each day. Sediment will be removed from the roads by shoveling or sweeping and transported to a sediment disposal area. Street washing will be allowed only after sediment is removed in this manner. Bulk clearing of accumulated sediment will not include flushing the areas with water. Cleared sediment will be returned to the point of likely origin or other suitable location. (3) The contractor shall ensure that compliance with applicable state or local waste disposal, sanitary sewer or septic system regulations is attained. (4) Contractor will ensure that no discharges from any temporary asphalt paving operations are allowed to enter into the stormwater system. (5) Contractor will ensure that any other potential pollution sources such as the storage of fertilizers, chemicals, vehicle fueling, sanitary waste facilities, etc. will be managed in a manner consistent with local and state regulations. The contractor will provide the owner with a list of any hazardous materials at least 48 hours before bringing the materials onsite. Materials will be handled in a controlled manner with as few handlings as possible. Materials will be stored and protected in accordance with the manufacturer's recommendations and requirements of the project specifications. G. Pollution Prevention Plan (1) Short and Long -Term Goals and Criteria (a) The construction -phase erosion and sediment controls will be designed to retain sediment on site to the maximum extent practicable and to eliminate or reduce discharges of oil, grease, floatables, suspended sediments or dissolved pollutants to receiving waters. (b) All Control measures must be properly installed and maintained in accordance with the manufacturers' specifications and good engineering practices. If periodic inspections or other information indicates a control has been used inappropriately or incorrectly, the contractor must replace or modify the control for site situations. (c) If sediment escapes the construction site, off -site accumulations of sediment must be removed by Contractor at a frequency sufficient to minimize off -site impacts (e.g., sediment in the street could be washed into storm sewers by the next rain and/or pose a safety hazard to users of public streets). (d) Contractor must remove sediment from sediment traps or sedimentation ponds when the volume of the wet storage has been reduced by 50%. (e) Litter, construction debris, and construction chemicals exposed to storm water will be prevented from becoming a pollutant source for storm water discharges (e.g., screening outfalls, picked up daily). Contractor will clean storm water inlets as required to ensure that grounds and public properties are maintained free from accumulations of waste materials and rubbish. All waste materials will be removed from the site and legally disposed at public or private dumping areas. Contractor will provide on -site containers for collection of waste materials, debris, and rubbish. The disposal of solid waste in open dumps is prohibited. The disposal of wastes into the storm drainage system or waterways is prohibited. The contractor will completely remove temporary materials and equipment when their use is no longer required. At the completion of the project, the contractor will remove waste materials, rubbish, tools, equipment, machinery, and surplus materials, and clean all sight -exposed surfaces. The project site will be left clean and ready for public use. All cleaning and disposal operations will be conducted in accordance with all current local, state, and federal codes, laws, ordinances, regulations, rules, standards, etc. Disposal of demolition and debris materials will be in landfills approved for such use by local, state, and federal regulatory agencies. Debris, rubbish, concrete, and other demolition material will be removed and transported in a manner that will prevent spillage on pavements, streets, and adjacent areas. Spillage that occurs will be cleaned up. Volatile wastes will be stored in covered metal containers and removed from the premises daily. The disposal of volatile wastes in storm or sanitary drains is prohibited. The contractor will prevent the accumulation of wastes, which create hazardous conditions. (2) Inspections The contractor will bear primary responsibility for daily inspections of all E&S devices and pollution prevention measures to ensure continuing effectiveness. A record of inspections and corrective actions shall be kept on -site. The contractor will bear primary responsibility for daily inspections of all E&S devices and pollution prevention measures to ensure continuing effectiveness. A record of inspections and corrective actions shall be kept on -site. This inspection frequency shall be modified to every four (4) business days if a TMDL or exceptional waterway impacted by the construction is identified in this SWPPP. Contractor inspections shall be conducted as follows: At least once every five (5) business days. Within 48 hours of the end of a storm event that results in runoff. Where areas have been finally or temporarily stabilized or runoff is unlikely due to winter conditions (e.g., the site is covered with snow or ice, or frozen ground exists) such inspections shall be conducted at least once every month. Disturbed areas and areas used for storage of materials that are exposed to precipitation shall be inspected for evidence of, or the potential for, pollutants entering the drainage system. Erosion and sediment control measures identified in the plan shall be observed to ensure that they are operating correctly. Where discharge locations or points are accessible, they shall be inspected to ascertain whether erosion control measures are effective in preventing significant impacts to receiving waters. Where discharge locations are inaccessible, nearby downstream locations shall be inspected to the extent that such inspections are practicable. Locations where vehicles enter or exit the site shall be inspected for evidence of offsite sediment tracking. Based on the results of the inspection, if contractor believes that stormwater controls are not operating effectively he will report such to the Design Engineer. The design engineer will revise the stormwater pollution prevention devices as appropriate, but in no case later than seven (7) calendar days following the inspection. If the existing erosion and sediment controls need to be modified or if additional erosion and sediment controls are necessary, implementation will be completed before the next anticipated storm event. If implementation before the next anticipated stone event is impracticable, they shall be implemented as soon as practicable. Such modifications will provide for timely implementation of any changes to the plan within seven (7) calendar days following the inspection. Contractor shall prepare a report summarizing the scope of the inspection, names and qualifications of personnel making the inspection, the dates of the inspection, major observations relating to the implementation of the stormwater pollution prevention plan, and actions taken in accordance with Part II F.4 and II G of the DEQ Stonnwater Regulations. The report shall be made and retained as part of the stormwater pollution prevention plan in accordance with Part II B of the regulations. Major observations should include: the location(s) of discharges of sediment or other pollutants from the site; location(s) of erosion and sediment controls that need to be maintained; location(s) of erosion and sediment controls that failed to operate as designed or proved inadequate for a particular location; and location(s) where additional erosion and sediment controls are needed that did not exist at the time of inspection. Such reports shall identify any incidents of noncompliance. Where a report does not identify any incidents of noncompliance, the report shall contain a certification that the facility is in compliance with the stormwater pollution prevention plan and this permit. The report shall be signed in accordance with Part III K of this permit. Copies of the report forms to be completed by the inspector are attached in Appendix B. The inspection reports will be signed in accordance with the permit requirements. These reports will be provided to the construction manager at the completion of the project. Section 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. (Provide detailed measures for any applicable TMDL) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 8. Qualified personnel The following personnel are responsible for inspections; (Provide the name, telephone number, and qualifications of the qualified personnel conducting inspections.) ex Mays (RST Development, LLC) Issued — 10/2014 Stormwater Pollution Prevention Plan (S WPPP) Albemarle County Section 9. Signed Certification (Provide certification accordimu to 9VAC25-870-3170) CERTIFICATION "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Operator Name: Alex Mays Company: RST Development, LLC. Title: Signature: Date: Issued — 10/2014 Stormwater Pollution Prevention Plan (S WPPP) Albemarle County Section 10. Delegation of authority. (Provide the persons or positions with authority to sign inspection reports or to modify the stormwater pollution prevention plan. A formal, signed delegation of authority is needed.) Delegation of Authority I, (name), hereby designate the person or specifically described position below to be a duly authorized representative for the purpose of overseeing compliance with environmental requirements, including the Construction General Permit, at the construction site. The designee is authorized to sign any reports, stormwater pollution prevention plans and all other documents required by the permit. (name of person or position) (company) (address) (city, state, zip) (phone) By signing this authorization, I confirm that I meet the requirements to make such a designation as set forth in the Construction General Permit (CGP), and that the designee above meets the definition of a "duly authorized representative". Operator Name: Company: Title: Signature: Date: Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 11. General permit copy (Provide a copy of the construction general permit, 9VAC25-880) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Virginia Administrative Code Title 9. Environment Agency 25. State Water Control Board Chapter 880. General VPDES Permit for Discharges of Stormwater from Construction Activities 9VAC25-880-70. General permit. Any operator whose registration statement is accepted by the board will receive the following general permit and shall comply with the requirements contained therein and be subject to all requirements of 9VAC25-870. General Permit No.: VAR10 Effective Date: July 1, 2019 Expiration Date: June 30, 2024 GENERAL VPDES PERMIT FOR DISCHARGES OF STORMWATER FROM CONSTRUCTION ACTIVITIES AUTHORIZATION TO DISCHARGE UNDER THE VIRGINIA STORMWATER MANAGEMENT PROGRAM AND THE VIRGINIA STORMWATER MANAGEMENT ACT In compliance with the provisions of the Clean Water Act, as amended, and pursuant to the Virginia Stormwater Management Act and regulations adopted pursuant thereto, operators of construction activities are authorized to discharge to surface waters within the boundaries of the Commonwealth of Virginia, except those specifically named in State Water Control Board regulations that prohibit such discharges. The authorized discharge shall be in accordance with the registration statement filed with the Department of Environmental Quality, this cover page, Part I - Discharge Authorization and Special Conditions, Part II - Stormwater Pollution Prevention Plan, and Part III - Conditions Applicable to All VPDES Permits as set forth in this general permit. A. Coverage under this general permit. 1. During the period beginning with the date of coverage under this general permit and lasting until the general permit's expiration date, the operator is authorized to discharge stormwater from construction activities. 2. This general permit also authorizes stormwater discharges from support activities (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, borrow areas) located on -site or off -site provided that: a. The support activity is directly related to the construction activity that is required to have general permit coverage for discharges of stormwater from construction activities; b. The support activity is not a commercial operation, nor does it serve multiple unrelated construction activities by different operators; c. The support activity does not operate beyond the completion of the last construction activity it supports; d. The support activity is identified in the registration statement at the time of general permit coverage; e. Appropriate control measures are identified in a stormwater pollution prevention plan and implemented to address the discharges from the support activity areas; and E All applicable state, federal, and local approvals are obtained for the support activity. B. Limitations on coverage. 1. Post -construction discharges. This general permit does not authorize stormwater discharges that originate from the site after construction activities have been completed and the site, including any support activity sites covered under the general permit registration, has undergone final stabilization. Post -construction industrial stormwater discharges may need to be covered by a separate VPDES permit. 2. Discharges mixed with nonstormwater. This general permit does not authorize discharges that are mixed with sources of nonstormwater, other than those discharges that are identified in Part I E (Authorized nonstormwater discharges) and are in compliance with this general permit. 3. Discharges covered by another state permit. This general permit does not authorize discharges of stormwater from construction activities that have been covered under an individual permit or required to obtain coverage under an alternative general permit. 4. Impaired waters and total maximum daily load (TMDL) limitation. a. Nutrient and sediment impaired waters. Discharges of stormwater from construction activities to surface waters identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit for (i) sediment or a sediment -related parameter (i.e., total suspended solids or turbidity) or (ii) nutrients (i.e., nitrogen or phosphorus) are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a stormwater pollution prevention plan (SWPPP) in accordance with Part II B 5 of this permit that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations and implements an inspection frequency consistent with Part II G 2 a. b. Polychlorinated biphenyl (PCB) impaired waters. Discharges of stormwater from construction activities that include the demolition of any structure with at least 10,000 square feet of floor space built or renovated before January 1, 1980, to surface waters identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit for PCB are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a SWPPP in accordance with Part II B 6 of this permit that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations, and implements an inspection frequency consistent with Part IIG2a. S. Exceptional waters limitation. Discharges of stormwater from construction activities not previously covered under the general permit effective on July 1, 2014, to exceptional waters identified in 9VAC25-260-30 A 3 c are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a SWPPP in accordance with Part II B 7 of this permit and implements an inspection frequency consistent with Part II G 2 a. 6. There shall be no discharge of floating solids or visible foam in other than trace amounts. C. Commingled discharges. Discharges authorized by this general permit may be commingled with other sources of stormwater that are not required to be covered under a state permit, so long as the commingled discharge is in compliance with this general permit. Discharges authorized by a separate state or VPDES permit may be commingled with discharges authorized by this general permit so long as all such discharges comply with all applicable state and VPDES permit requirements. D. Prohibition of nonstormwater discharges. Except as provided in Parts I A 2, I C, and I E, all discharges covered by this general permit shall be composed entirely of stormwater associated with construction activities. All other discharges including the following are prohibited: 1. Wastewater from washout of concrete; 2. Wastewater from the washout and cleanout of stucco, paint, form release oils, curing compounds, and other construction materials; 3. Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance; 4.Oils, toxic substances, or hazardous substances from spills or other releases; and S. Soaps, solvents, or detergents used in equipment and vehicle washing. E. Authorized nonstormwater discharges. The following nonstormwater discharges from construction activities are authorized by this general permit when discharged in compliance with this general permit: 1. Discharges from firefighting activities; 2. Fire hydrant flushings; 3. Waters used to wash vehicles or equipment where soaps, solvents, or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge; 4. Water used to control dust that has been filtered, settled, or similarly treated prior to discharge; S. Potable water sources, including uncontaminated waterline flushings, managed in a manner to avoid an instream impact; 6. Routine external building wash down where soaps, solvents or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge; 7. Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (or where all spilled or leaked material has been removed prior to washing); where soaps, solvents, or detergents have not been used; and where the wash water has been filtered, settled, or similarly treated prior to discharge; 8. Uncontaminated air conditioning or compressor condensate; 9. Uncontaminated ground water or spring water; 10. Foundation or footing drains where flows are not contaminated with process materials such as solvents; 11. Uncontaminated excavation dewatering, including dewatering of trenches and excavations that have been filtered, settled, or similarly treated prior to discharge; and 12. Landscape irrigation. F. Termination of general permit coverage. 1. The operator of the construction activity shall submit a notice of termination in accordance with 9VAC25-880-60, unless a registration statement was not required to be submitted in accordance with 9VAC25-880-50 A 1 c or A 2 b for single-family detached residential structures, to the VSMP authority after one or more of the following conditions have been met: a. Necessary permanent control measures included in the SWPPP for the site are in place and functioning effectively and final stabilization has been achieved on all portions of the site for which the operator has operational control. When applicable, long term responsibility and maintenance requirements for permanent control measures shall be recorded in the local land records prior to the submission of a complete and accurate notice of termination and the construction record drawing prepared; b. Another operator has assumed control over all areas of the site that have not been finally stabilized and obtained coverage for the ongoing discharge; c. Coverage under an alternative VPDES or state permit has been obtained; or d. For individual lots in residential construction only, final stabilization as defined in 9VAC25-880-1 has been completed, including providing written notification to the homeowner and incorporating a copy of the notification and signed certification statement into the SWPPP, and the residence has been transferred to the homeowner. 2. The notice of termination shall be submitted no later than 30 days after one of the above conditions in subdivision 1 of this subsection is met. 3. Termination of authorization to discharge for the conditions set forth in subdivision 1 a of this subsection shall be effective upon notification from the department that the provisions of subdivision 1 a of this subsection have been met or 60 days after submittal of a complete and accurate notice of termination in accordance with 9VAC25-880-60 C, whichever occurs first. 4. Authorization to discharge terminates at midnight on the date that the notice of termination is submitted for the conditions set forth in subdivisions 1 b through 1 d of this subsection unless otherwise notified by the VSMP authority or department. S. The notice of termination shall be signed in accordance with Part III K of this general permit. G. Water quality protection. 1. The operator shall select, install, implement, and maintain control measures as identified in the SWPPP at the construction site that minimize pollutants in the discharge as necessary to ensure that the operator's discharge does not cause or contribute to an excursion above any applicable water quality standard. 2. If it is determined by the department that the operator's discharges are causing, have reasonable potential to cause, or are contributing to an excursion above any applicable water quality standard, the department, in consultation with the VSMP authority, may take appropriate enforcement action and require the operator to: a. Modify or implement additional control measures in accordance with Part II C to adequately address the identified water quality concerns; b. Submit valid and verifiable data and information that are representative of ambient conditions and indicate that the receiving water is attaining water quality standards; or c. Submit an individual permit application in accordance with 9VAC25-870-410 B 3. All written responses required under this chapter shall include a signed certification consistent with Part III K. Part II STORMWATER POLLUTION PREVENTION PLAN A. Stormwater pollution prevent plan. 1. A stormwater pollution prevention plan (SWPPP) shall be developed prior to the submission of a registration statement and implemented for the construction activity, including any support activity, covered by this general permit. SWPPPs shall be prepared in accordance with good engineering practices. Construction activities that are part of a larger common plan of development or sale and disturb less than one acre may utilize a SWPPP template provided by the department and need not provide a separate stormwater management plan if one has been prepared and implemented for the larger common plan of development or sale. 2. The SWPPP requirements of this general permit may be fulfilled by incorporating by reference other plans such as a spill prevention control and countermeasure (SPCC) plan developed for the site under § 311 of the federal Clean Water Act or best management practices (BMP) programs otherwise required for the facility provided that the incorporated plan meets or exceeds the SWPPP requirements of Part II B. All plans incorporated by reference into the SWPPP become enforceable under this general permit. If a plan incorporated by reference does not contain all of the required elements of the SWPPP, the operator shall develop the missing elements and include them in the SWPPP. 3. Any operator that was authorized to discharge under the general permit effective July 1, 2014, and that intends to continue coverage under this general permit, shall update its stormwater pollution prevention plan to comply with the requirements of this general permit no later than 60 days after the date of coverage under this general permit. B. Contents. The SWPPP shall include the following items: 1. General information. a. A signed copy of the registration statement, if required, for coverage under the general VPDES permit for discharges of stormwater from construction activities; b. Upon receipt, a copy of the notice of coverage under the general VPDES permit for discharges of stormwater from construction activities (i.e., notice of coverage letter); c. Upon receipt, a copy of the general VPDES permit for discharges of stormwater from construction activities; d. A narrative description of the nature of the construction activity, including the function of the project (e.g., low density residential, shopping mall, highway, etc.); e. A legible site plan identifying: (1) Directions of stormwater flow and approximate slopes anticipated after major grading activities; (2) Limits of land disturbance including steep slopes and natural buffers around surface waters that will not be disturbed; (3) Locations of major structural and nonstructural control measures, including sediment basins and traps, perimeter dikes, sediment barriers, and other measures intended to filter, settle, or similarly treat sediment, that will be installed between disturbed areas and the undisturbed vegetated areas in order to increase sediment removal and maximize stormwater infiltration; (4) Locations of surface waters; (5) Locations where concentrated stormwater is discharged; (6) Locations of any support activities, including (i) areas where equipment and vehicle washing, wheel wash water, and other wash water is to occur; (ii) storage areas for chemicals such as acids, fuels, fertilizers, and other lawn care chemicals; (iii) concrete wash out areas; (iv) vehicle fueling and maintenance areas; (v) sanitary waste facilities, including those temporarily placed on the construction site; and (vi) construction waste storage; and (7) When applicable, the location of the on -site rain gauge or the methodology established in consultation with the VSMP authority used to identify measurable storm events for inspection as allowed by Part II G 2 a (1) (ii) or 2 b (2). 2. Erosion and sediment control plan. a. An erosion and sediment control plan designed and approved in accordance with the Virginia Erosion and Sediment Control Regulations (9VAC25-840), an "agreement in lieu of a plan" as defined in 9VAC25-840-10 from the VESCP authority, or an erosion and sediment control plan prepared in accordance with annual standards and specifications approved by the department. b. All erosion and sediment control plans shall include a statement describing the maintenance responsibilities required for the erosion and sediment controls used. c. An approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department -approved annual standards and specifications, implemented to: (1) Control the volume and velocity of stormwater runoff within the site to minimize soil erosion; (2) Control stormwater discharges, including peak flow rates and total stormwater volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion; (3) Minimize the amount of soil exposed during the construction activity; (4) Minimize the disturbance of steep slopes; (5) Minimize sediment discharges from the site in a manner that addresses (i) the amount, frequency, intensity, and duration of precipitation; (ii) the nature of resulting stormwater runoff; and (iii) soil characteristics, including the range of soil particle sizes present on the site; (6) Provide and maintain natural buffers around surface waters, direct stormwater to vegetated areas to increase sediment removal, and maximize stormwater infiltration, unless infeasible; (7) Minimize soil compaction and, unless infeasible, preserve topsoil; (8) Ensure initiation of stabilization activities, as defined in 9VAC25-880-1, of disturbed areas immediately whenever any clearing, grading, excavating, or other land -disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 days; and (9) Utilize outlet structures that withdraw stormwater from the surface (i.e., above the permanent pool or wet storage water surface elevation), unless infeasible, when discharging from sediment basins or sediment traps. 3. Stormwater management plan. a. Except for those projects identified in Part II B 3 b, a stormwater management plan approved by the VSMP authority as authorized under the Virginia Stormwater Management Program (VSMP) Regulation (9VAC25-870), or an "agreement in lieu of a stormwater management plan" as defined in 9VAC25-870-10 from the VSMP authority, or a stormwater management plan prepared in accordance with annual standards and specifications approved by the department. b. For any operator meeting the conditions of 9VAC25-870-47 B of the VSMP regulation, an approved stormwater management plan is not required. In lieu of an approved stormwater management plan, the SWPPP shall include a description of, and all necessary calculations supporting, all post -construction stormwater management measures that will be installed prior to the completion of the construction process to control pollutants in stormwater discharges after construction operations have been completed. Structural measures should be placed on upland soils to the degree possible. Such measures must be designed and installed in accordance with applicable VESCP authority, VSMP authority, state, and federal requirements, and any necessary permits must be obtained. 4. Pollution prevention plan. A pollution prevention plan that addresses potential pollutant -generating activities that may reasonably be expected to affect the quality of stormwater discharges from the construction activity, including any support activity. The pollution prevention plan shall: a. Identify the potential pollutant -generating activities and the pollutant that is expected to be exposed to stormwater; b. Describe the location where the potential pollutant -generating activities will occur, or if identified on the site plan, reference the site plan; c. Identify all nonstormwater discharges, as authorized in Part I E of this general permit, that are or will be commingled with stormwater discharges from the construction activity, including any applicable support activity; d. Identify the person responsible for implementing the pollution prevention practice or practices for each pollutant -generating activity (if other than the person listed as the qualified personnel); e. Describe the pollution prevention practices and procedures that will be implemented to: (1) Prevent and respond to leaks, spills, and other releases including (i) procedures for expeditiously stopping, containing, and cleaning up spills, leaks, and other releases; and (ii) procedures for reporting leaks, spills, and other releases in accordance with Part III G; (2) Prevent the discharge of spilled and leaked fuels and chemicals from vehicle fueling and maintenance activities (e.g., providing secondary containment such as spill berms, decks, spill containment pallets, providing cover where appropriate, and having spill kits readily available); (3) Prevent the discharge of soaps, solvents, detergents, and wash water from construction materials, including the clean-up of stucco, paint, form release oils, and curing compounds (e.g., providing (i) cover (e.g., plastic sheeting or temporary roofs) to prevent contact with stormwater; (ii) collection and proper disposal in a manner to prevent contact with stormwater; and (iii) a similarly effective means designed to prevent discharge of these pollutants); (4) Minimize the discharge of pollutants from vehicle and equipment washing, wheel wash water, and other types of washing (e.g., locating activities away from surface waters and stormwater inlets or conveyance and directing wash waters to sediment basins or traps, using filtration devices such as filter bags or sand filters, or using similarly effective controls); (5) Direct concrete wash water into a leak -proof container or leak -proof settling basin. The container or basin shall be designed so that no overflows can occur due to inadequate sizing or precipitation. Hardened concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wastes. Liquid concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wash waters and shall not be discharged to surface waters; (6) Minimize the discharge of pollutants from storage, handling, and disposal of construction products, materials, and wastes including (i) building products such as asphalt sealants, copper flashing, roofing materials, adhesives, and concrete admixtures; (ii) pesticides, herbicides, insecticides, fertilizers, and landscape materials; and (iii) construction and domestic wastes such as packaging materials, scrap construction materials, masonry products, timber, pipe and electrical cuttings, plastics, Styrofoam, concrete, and other trash or building materials; (7) Prevent the discharge of fuels, oils, and other petroleum products, hazardous or toxic wastes, waste concrete, and sanitary wastes; (8) Address any other discharge from the potential pollutant -generating activities not addressed above; and (9) Minimize the exposure of waste materials to precipitation by closing or covering waste containers during precipitation events and at the end of the business day, or implementing other similarly effective practices. Minimization of exposure is not required in cases where the exposure to precipitation will not result in a discharge of pollutants; and f. Describe procedures for providing pollution prevention awareness of all applicable wastes, including any wash water, disposal practices, and applicable disposal locations of such wastes, to personnel in order to comply with the conditions of this general permit. The operator shall implement the procedures described in the SWPPP. S. SWPPP requirements for discharges to nutrient and sediment impaired waters. For discharges to surface waters (i) identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or (ii) with an applicable TMDL wasteload allocation established and approved prior to the term of this general permit for sediment for a sediment -related parameter (i.e., total suspended solids or turbidity) or nutrients (i.e., nitrogen or phosphorus), the operator shall: a. Identify the impaired waters, approved TMDLs, and pollutants of concern in the SWPPP; and b. Provide clear direction in the SWPPP that: (1) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; (2) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and (3) A modified inspection schedule shall be implemented in accordance with Part II G 2 a. 6. SWPPP requirements for discharges to polychlorinated biphenyl (PCB) impaired waters. For discharges from construction activities that include the demolition of any structure with at least 10,000 square feet of floor space built or renovated before January 1, 1980, to surface waters (i) identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or (ii) with an applicable TMDL wasteload allocation established and approved prior to the term of this general permit for PCB, the operator shall: a. Identify the impaired waters, approved TMDLs, and pollutant of concern in the SWPPP; b. Implement the approved erosion and sediment control plan in accordance with Part IIB2; c. Dispose of waste materials in compliance with applicable state, federal, and local requirements; and d. Implement a modified inspection schedule in accordance with Part II G 2 a. 7. SWPPP requirements for discharges to exceptional waters. For discharges to surface waters identified in 9VAC25-260-30 A 3 c as an exceptional water, the operator shall: a. Identify the exceptional surface waters in the SWPPP; and b. Provide clear direction in the SWPPP that: (1) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; (2) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and (3) A modified inspection schedule shall be implemented in accordance with Part II G 2 a. 8. Identification of qualified personnel. The name, phone number, and qualifications of the qualified personnel conducting inspections required by this general permit. 9. Delegation of authority. The individuals or positions with delegated authority, in accordance with Part III K, to sign inspection reports or modify the SWPPP. 10. SWPPP signature. The SWPPP shall be signed and dated in accordance with Part III K. C. SWPPP amendments, modification, and updates. 1. The operator shall amend the SWPPP whenever there is a change in the design, construction, operation, or maintenance that has a significant effect on the discharge of pollutants to surface waters and that has not been previously addressed in the SWPPP. 2. The SWPPP shall be amended if, during inspections or investigations by the operator's qualified personnel, or by local, state, or federal officials, it is determined that the existing control measures are ineffective in minimizing pollutants in discharges from the construction activity. Revisions to the SWPPP shall include additional or modified control measures designed and implemented to correct problems identified. If approval by the VESCP authority, VSMP authority, or department is necessary for the control measure, revisions to the SWPPP shall be completed no later than seven calendar days following approval. Implementation of these additional or modified control measures shall be accomplished as described in Part II H. 3. The SWPPP shall clearly identify the contractors that will implement and maintain each control measure identified in the SWPPP. The SWPPP shall be amended to identify any new contractor that will implement and maintain a control measure. 4. The operator shall update the SWPPP as soon as possible but no later than seven days following any modification to its implementation. All modifications or updates to the SWPPP shall be noted and shall include the following items: a. A record of dates when: (1) Major grading activities occur; (2) Construction activities temporarily or permanently cease on a portion of the site; and (3) Stabilization measures are initiated; b. Documentation of replaced or modified controls where periodic inspections or other information have indicated that the controls have been used inappropriately or incorrectly and were modified; c. Areas that have reached final stabilization and where no further SWPPP or inspection requirements apply; d. All properties that are no longer under the legal control of the operator and the dates on which the operator no longer had legal control over each property; e. The date of any prohibited discharges, the discharge volume released, and what actions were taken to minimize the impact of the release; f. Measures taken to prevent the reoccurrence of any prohibited discharge; and g. Measures taken to address any evidence identified as a result of an inspection required under Part II G. S. Amendments, modifications, or updates to the SWPPP shall be signed in accordance with Part III K. D. Public notification. Upon commencement of land disturbance, the operator shall post conspicuously a copy of the notice of coverage letter near the main entrance of the construction activity. For linear projects, the operator shall post the notice of coverage letter at a publicly accessible location near an active part of the construction project (e.g., where a pipeline crosses a public road). The operator shall maintain the posted information until termination of general permit coverage as specified in Part I F. E. SWPPP availability. 1. Operators with day-to-day operational control over SWPPP implementation shall have a copy of the SWPPP available at a central location on -site for use by those identified as having responsibilities under the SWPPP whenever they are on the construction site. 2. The operator shall make the SWPPP and all amendments, modifications, and updates available upon request to the department, the VSMP authority, the EPA, the VESCP authority, local government officials, or the operator of a municipal separate storm sewer system receiving discharges from the construction activity. If an on -site location is unavailable to store the SWPPP when no personnel are present, notice of the SWPPP's location shall be posted near the main entrance of the construction site. 3. The operator shall make the SWPPP available for public review in an electronic format or in hard copy. Information for public access to the SWPPP shall be posted and maintained in accordance with Part II D. If not provided electronically, public access to the SWPPP may be arranged upon request at a time and at a publicly accessible location convenient to the operator or his designee but shall be no less than once per month and shall be during normal business hours. Information not required to be contained within the SWPPP by this general permit is not required to be released. F. SWPPP implementation. The operator shall implement the SWPPP and subsequent amendments, modifications, and updates from commencement of land disturbance until termination of general permit coverage as specified in Part I F. 1. All control measures shall be properly maintained in effective operating condition in accordance with good engineering practices and, where applicable, manufacturer specifications. If a site inspection required by Part II G identifies a control measure that is not operating effectively, corrective actions shall be completed as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority, to maintain the continued effectiveness of the control measures. 2. If site inspections required by Part II G identify an existing control measure that needs to be modified or if an additional or alternative control measure is necessary for any reason, implementation shall be completed prior to the next anticipated measurable storm event. If implementation prior to the next anticipated measurable storm event is impracticable, then additional or alternative control measures shall be implemented as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority. G. SWPPP Inspections. 1. Personnel responsible for on -site and off -site inspections. Inspections required by this general permit shall be conducted by the qualified personnel identified by the operator in the SWPPP. The operator is responsible for ensuring that the qualified personnel conduct the inspection. 2. Inspection schedule. a. For construction activities that discharge to a surface water identified in Part II B S and B 6 as impaired or having an approved TMDL or Part II B 7 as exceptional, the following inspection schedule requirements apply: (1) Inspections shall be conducted at a frequency of (i) at least once every four business days or (ii) at least once every five business days and no later than 24 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 24 hours between business days, the inspection shall be conducted on the next business day; and (2) Representative inspections as authorized in Part II G 2 d shall not be allowed. b. Except as specified in Part II G 2 a, inspections shall be conducted at a frequency of: (1) At least once every five business days; or (2) At least once every 10 business days and no later than 24 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 24 hours between business days, the inspection shall be conducted on the next business day. c. Where areas have been temporarily stabilized or land -disturbing activities will be suspended due to continuous frozen ground conditions and stormwater discharges are unlikely, the inspection frequency described in Part II G 2 a and 2 b may be reduced to once per month. If weather conditions (such as above freezing temperatures or rain or snow events) make discharges likely, the operator shall immediately resume the regular inspection frequency. d. Except as prohibited in Part II G 2 a (2), representative inspections may be utilized for utility line installation, pipeline construction, or other similar linear construction activities provided that: (1) Temporary or permanent soil stabilization has been installed and vehicle access may compromise the temporary or permanent soil stabilization and potentially cause additional land disturbance increasing the potential for erosion; (2) Inspections occur on the same frequency as other construction activities; (3) Control measures are inspected along the construction site 0.25 miles above and below each access point (i.e., where a roadway, undisturbed right-of-way, or other similar feature intersects the construction activity and access does not compromise temporary or permanent soil stabilization); and (4) Inspection locations are provided in the inspection report required by Part II G. e. If adverse weather causes the safety of the inspection personnel to be in jeopardy, the inspection may be delayed until the next business day on which it is safe to perform the inspection. Any time inspections are delayed due to adverse weather conditions, evidence of the adverse weather conditions shall be included in the SWPPP with the dates of occurrence. 3. Inspection requirements. a. As part of the inspection, the qualified personnel shall: (1) Record the date and time of the inspection and, when applicable, the date and rainfall amount of the last measurable storm event; (2) Record the information and a description of any discharges occurring at the time of the inspection or evidence of discharges occurring prior to the inspection; (3) Record any land -disturbing activities that have occurred outside of the approved erosion and sediment control plan; (4) Inspect the following for installation in accordance with the approved erosion and sediment control plan, identification of any maintenance needs, and evaluation of effectiveness in minimizing sediment discharge, including whether the control has been inappropriately or incorrectly used: (a) All perimeter erosion and sediment controls, such as silt fence; (b) Soil stockpiles, when applicable, and borrow areas for stabilization or sediment trapping measures; (c) Completed earthen structures, such as dams, dikes, ditches, and diversions for stabilization and effective impoundment or flow control; (d) Cut and fill slopes; (e) Sediment basins and traps, sediment barriers, and other measures installed to control sediment discharge from stormwater; (f) Temporary or permanent channels, flumes, or other slope drain structures installed to convey concentrated runoff down cut and fill slopes; (g) Storm inlets that have been made operational to ensure that sediment laden stormwater does not enter without first being filtered or similarly treated; and (h) Construction vehicle access routes that intersect or access paved or public roads for minimizing sediment tracking; (5) Inspect areas that have reached final grade or that will remain dormant for more than 14 days to ensure: (a) Initiation of stabilization activities have occurred immediately, as defined in 9VAC25-880-1; and (b) Stabilization activities have been completed within seven days of reaching grade or stopping work; (6) Inspect for evidence that the approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department -approved annual standards and specifications has not been properly implemented. This includes: (a) Concentrated flows of stormwater in conveyances such as rills, rivulets, or channels that have not been filtered, settled, or similarly treated prior to discharge, or evidence thereof; (b) Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove sediments prior to discharge; (c) Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that discharge to surface waters. Inlets and catch basins with failing sediment controls due to improper installation, lack of maintenance, or inadequate design are considered unprotected; (d) Sediment deposition on any property (including public and private streets) outside of the construction activity covered by this general permit; (e) Required stabilization has not been initiated or completed or is not effective on portions of the site; (f) Sediment basins without adequate wet or dry storage volume or sediment basins that allow the discharge of stormwater from below the surface of the wet storage portion of the basin; (g) Sediment traps without adequate wet or dry storage or sediment traps that allow the discharge of stormwater from below the surface of the wet storage portion of the trap; and (h) Land disturbance or sediment deposition outside of the approved area to be disturbed; (7) Inspect pollutant generating activities identified in the pollution prevention plan for the proper implementation, maintenance, and effectiveness of the procedures and practices; (8) Identify any pollutant generating activities not identified in the pollution prevention plan; and (9) Identify and document the presence of any evidence of the discharge of pollutants prohibited by this general permit. 4. Inspection report. Each inspection report shall include the following items: a. The date and time of the inspection and, when applicable, the date and rainfall amount of the last measurable storm event; b. Summarized findings of the inspection; c. The locations of prohibited discharges; d. The locations of control measures that require maintenance; e. The locations of control measures that failed to operate as designed or proved inadequate or inappropriate for a particular location; L The locations where any evidence identified under Part II G 3 a (6) exists; g. The locations where any additional control measure is needed; h. A list of corrective actions required (including any changes to the SWPPP that are necessary) as a result of the inspection or to maintain permit compliance; i. Documentation of any corrective actions required from a previous inspection that have not been implemented; and j. The date and signature of the qualified personnel and the operator or its duly authorized representative. S. The inspection report shall be included into the SWPPP no later than four business days after the inspection is complete. 6. The inspection report and any actions taken in accordance with Part II shall be retained by the operator as part of the SWPPP for at least three years from the date that general permit coverage expires or is terminated. The inspection report shall identify any incidents of noncompliance. Where an inspection report does not identify any incidents of noncompliance, the report shall contain a certification that the construction activity is in compliance with the SWPPP and this general permit. The report shall be signed in accordance with Part III K of this general permit. H. Corrective actions. 1. The operator shall implement the corrective actions identified as a result of an inspection as soon as practicable but no later than seven days after discovery or a longer period as approved by the VSMP authority. If approval of a corrective action by a regulatory authority (e.g., VSMP authority, VESCP authority, or the department) is necessary, additional control measures shall be implemented to minimize pollutants in stormwater discharges until such approvals can be obtained. 2. The operator may be required to remove accumulated sediment deposits located outside of the construction activity covered by this general permit as soon as practicable in order to minimize environmental impacts. The operator shall notify the VSMP authority and the department as well as obtain all applicable federal, state, and local authorizations, approvals, and permits prior to the removal of sediments accumulated in surface waters including wetlands. Part III CONDITIONS APPLICABLE TO ALL VPDES PERMITS NOTE: Discharge monitoring is not required for this general permit. If the operator chooses to monitor stormwater discharges or control measures, the operator shall comply with the requirements of subsections A, B, and C, as appropriate. A. Monitoring. 1. Samples and measurements taken for the purpose of monitoring shall be representative of the monitoring activity. 2. Monitoring shall be conducted according to procedures approved under 40 CFR Part 136 or alternative methods approved by the U.S. Environmental Protection Agency, unless other procedures have been specified in this general permit. Analyses performed according to test procedures approved under 40 CFR Part 136 shall be performed by an environmental laboratory certified under regulations adopted by the Department of General Services (lVAC30-45 or 1VAC30-46). 3. The operator shall periodically calibrate and perform maintenance procedures on all monitoring and analytical instrumentation at intervals that will ensure accuracy of measurements. B. Records. 1. Monitoring records and reports shall include: a. The date, exact place, and time of sampling or measurements; b. The individuals who performed the sampling or measurements; c. The dates and times analyses were performed; d. The individuals who performed the analyses; e. The analytical techniques or methods used; and f. The results of such analyses. 2. The operator shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this general permit, and records of all data used to complete the registration statement for this general permit, for a period of at least three years from the date of the sample, measurement, report or request for coverage. This period of retention shall be extended automatically during the course of any unresolved litigation regarding the regulated activity or regarding control standards applicable to the operator, or as requested by the board. C. Reporting monitoring results. 1. The operator shall update the SWPPP to include the results of the monitoring as may be performed in accordance with this general permit, unless another reporting schedule is specified elsewhere in this general permit. 2. Monitoring results shall be reported on a discharge monitoring report (DMR); on forms provided, approved or specified by the department; or in any format provided that the date, location, parameter, method, and result of the monitoring activity are included. 3. If the operator monitors any pollutant specifically addressed by this general permit more frequently than required by this general permit using test procedures approved under 40 CFR Part 136 or using other test procedures approved by the U.S. Environmental Protection Agency or using procedures specified in this general permit, the results of this monitoring shall be included in the calculation and reporting of the data submitted in the DMR or reporting form specified by the department. 4. Calculations for all limitations which require averaging of measurements shall utilize an arithmetic mean unless otherwise specified in this general permit. D. Duty to provide information. The operator shall furnish, within a reasonable time, any information which the board may request to determine whether cause exists for terminating this general permit coverage or to determine compliance with this general permit. The board, department, EPA, or VSMP authority may require the operator to furnish, upon request, such plans, specifications, and other pertinent information as may be necessary to determine the effect of the wastes from his discharge on the quality of surface waters, or such other information as may be necessary to accomplish the purposes of the CWA and the Virginia Stormwater Management Act. The operator shall also furnish to the board, department, EPA, or VSMP authority, upon request, copies of records required to be kept by this general permit. E. Compliance schedule reports. Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule of this general permit shall be submitted no later than 14 days following each schedule date. F. Unauthorized stormwater discharges. Pursuant to § 62.1-44.5 of the Code of Virginia, except in compliance with a state permit issued by the department, it shall be unlawful to cause a stormwater discharge from a construction activity. G. Reports of unauthorized discharges. Any operator who discharges or causes or allows a discharge of sewage, industrial waste, other wastes or any noxious or deleterious substance or a hazardous substance or oil in an amount equal to or in excess of a reportable quantity established under either 40 CFR Part 110, 40 CFR Part 117, 40 CFR Part 302, or § 62.1- 44.34:19 of the Code of Virginia that occurs during a 24-hour period into or upon surface waters or who discharges or causes or allows a discharge that may reasonably be expected to enter surface waters, shall notify the Department of Environmental Quality of the discharge immediately upon discovery of the discharge, but in no case later than within 24 hours after said discovery. A written report of the unauthorized discharge shall be submitted to the department and the VSMP authority within five days of discovery of the discharge. The written report shall contain: 1. A description of the nature and location of the discharge; 2. The cause of the discharge; 3. The date on which the discharge occurred; 4. The length of time that the discharge continued; S. The volume of the discharge; 6. If the discharge is continuing, how long it is expected to continue; 7. If the discharge is continuing, what the expected total volume of the discharge will be; and 8. Any steps planned or taken to reduce, eliminate and prevent a recurrence of the present discharge or any future discharges not authorized by this general permit. Discharges reportable to the department and the VSMP authority under the immediate reporting requirements of other regulations are exempted from this requirement. H. Reports of unusual or extraordinary discharges. If any unusual or extraordinary discharge including a "bypass" or "upset," as defined in this general permit, should occur from a facility and the discharge enters or could be expected to enter surface waters, the operator shall promptly notify, in no case later than within 24 hours, the department and the VSMP authority by telephone after the discovery of the discharge. This notification shall provide all available details of the incident, including any adverse effects on aquatic life and the known number of fish killed. The operator shall reduce the report to writing and shall submit it to the department and the VSMP authority within five days of discovery of the discharge in accordance with Part 11112. Unusual and extraordinary discharges include any discharge resulting from: 1. Unusual spillage of materials resulting directly or indirectly from processing operations; 2. Breakdown of processing or accessory equipment; 3. Failure or taking out of service of some or all of the facilities; and 4. Flooding or other acts of nature. I. Reports of noncompliance. The operator shall report any noncompliance which may adversely affect surface waters or may endanger public health. 1. An oral report to the department and the VSMP authority shall be provided within 24 hours from the time the operator becomes aware of the circumstances. The following shall be included as information that shall be reported within 24 hours under this subdivision: a. Any unanticipated bypass; and b. Any upset that causes a discharge to surface waters. 2. A written report shall be submitted within five days and shall contain: a. A description of the noncompliance and its cause; b. The period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and c. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. The department may waive the written report on a case -by -case basis for reports of noncompliance under Part III I if the oral report has been received within 24 hours and no adverse impact on surface waters has been reported. 3. The operator shall report all instances of noncompliance not reported under Part III 11 or 2 in writing as part of the SWPPP. The reports shall contain the information listed in Part 11112. NOTE: The reports required in Part III G, H and I shall be made to the department and the VSMP authority. Reports may be made by telephone, email, or by fax. For reports outside normal working hours, leaving a recorded message shall fulfill the immediate reporting requirement. For emergencies, the Virginia Department of Emergency Management maintains a 24-hour telephone service at 1-800-468-8892. 4. Where the operator becomes aware of a failure to submit any relevant facts, or submittal of incorrect information in any report, including a registration statement, to the department or the VSMP authority, the operator shall promptly submit such facts or correct information. j. Notice of planned changes. 1. The operator shall give notice to the department and the VSMP authority as soon as possible of any planned physical alterations or additions to the permitted facility or activity. Notice is required only when: a. The operator plans an alteration or addition to any building, structure, facility, or installation that may meet one of the criteria for determining whether a facility is a new source in 9VAC2S-870-420; b. The operator plans an alteration or addition that would significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants that are not subject to effluent limitations in this general permit; or 2. The operator shall give advance notice to the department and VSMP authority of any planned changes in the permitted facility or activity, which may result in noncompliance with state permit requirements. K. Signatory requirements. 1. Registration statement. All registration statements shall be signed as follows: a. For a corporation: by a responsible corporate officer. For the purpose of this chapter, a responsible corporate officer means: (i) a president, secretary, treasurer, or vice- president of the corporation in charge of a principal business function, or any other person who performs similar policy -making or decision -making functions for the corporation; or (ii) the manager of one or more manufacturing, production, or operating facilities, provided the manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for state permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures; b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or c. For a municipality, state, federal, or other public agency: by either a principal executive officer or ranking elected official. For purposes of this chapter, a principal executive officer of a public agency includes (i) the chief executive officer of the agency or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency. 2. Reports and other information. All reports required by this general permit, including SWPPPs, and other information requested by the board or the department shall be signed by a person described in Part III K 1 or by a duly authorized representative of that person. A person is a duly authorized representative only if: a. The authorization is made in writing by a person described in Part III K 1; b. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the operator. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and c. The signed and dated written authorization is included in the SWPPP. A copy shall be provided to the department and VSMP authority, if requested. 3. Changes to authorization. If an authorization under Part III K 2 is no longer accurate because a different individual or position has responsibility for the overall operation of the construction activity, a new authorization satisfying the requirements of Part III K 2 shall be submitted to the VSMP authority as the administering entity for the board prior to or together with any reports or information to be signed by an authorized representative. 4. Certification. Any person signing a document under Part III K 1 or 2 shall make the following certification: "I certify under penalty of law that I have read and understand this document and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." L. Duty to comply. The operator shall comply with all conditions of this general permit. Any state permit noncompliance constitutes a violation of the Virginia Stormwater Management Act and the Clean Water Act, except that noncompliance with certain provisions of this general permit may constitute a violation of the Virginia Stormwater Management Act but not the Clean Water Act. Permit noncompliance is grounds for enforcement action; for state permit coverage, termination, revocation and reissuance, or modification; or denial of a state permit renewal application. The operator shall comply with effluent standards or prohibitions established under § 307(a) of the Clean Water Act for toxic pollutants within the time provided in the regulations that establish these standards or prohibitions or standards for sewage sludge use or disposal, even if this general permit has not yet been modified to incorporate the requirement. M. Duty to reapply. If the operator wishes to continue an activity regulated by this general permit after the expiration date of this general permit, the operator shall submit a new registration statement at least 60 days before the expiration date of the existing general permit, unless permission for a later date has been granted by the board. The board shall not grant permission for registration statements to be submitted later than the expiration date of the existing general permit. N. Effect of a state permit. This general permit does not convey any property rights in either real or personal property or any exclusive privileges, nor does it authorize any injury to private property or invasion of personal rights, or any infringement of federal, state or local law or regulations. O. State law. Nothing in this general permit shall be construed to preclude the institution of any legal action under, or relieve the operator from any responsibilities, liabilities, or penalties established pursuant to any other state law or regulation or under authority preserved by § 510 of the Clean Water Act. Except as provided in general permit conditions on "bypassing" (Part III U) and "upset" (Part III V), nothing in this general permit shall be construed to relieve the operator from civil and criminal penalties for noncompliance. P. Oil and hazardous substance liability. Nothing in this general permit shall be construed to preclude the institution of any legal action or relieve the operator from any responsibilities, liabilities, or penalties to which the operator is or may be subject under §§ 62.1-44.34:14 through 62.1-44.34:23 of the State Water Control Law or § 311 of the Clean Water Act. Q. Proper operation and maintenance. The operator shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances), which are installed or used by the operator to achieve compliance with the conditions of this general permit. Proper operation and maintenance also includes effective plant performance, adequate funding, adequate staffing, and adequate laboratory and process controls, including appropriate quality assurance procedures. This provision requires the operation of back-up or auxiliary facilities or similar systems, which are installed by the operator only when the operation is necessary to achieve compliance with the conditions of this general permit. R. Disposal of solids or sludges. Solids, sludges or other pollutants removed in the course of treatment or management of pollutants shall be disposed of in a manner so as to prevent any pollutant from such materials from entering surface waters and in compliance with all applicable state and federal laws and regulations. S. Duty to mitigate. The operator shall take all steps to minimize or prevent any discharge in violation of this general permit that has a reasonable likelihood of adversely affecting human health or the environment. T. Need to halt or reduce activity not a defense. It shall not be a defense for an operator in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this general permit. U. Bypass. 1. "Bypass," as defined in 9VAC25-870-10, means the intentional diversion of waste streams from any portion of a treatment facility. The operator may allow any bypass to occur that does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to ensure efficient operation. These bypasses are not subject to the provisions of Part III U 2 and 3. 2. Notice. a. Anticipated bypass. If the operator knows in advance of the need for a bypass, the operator shall submit prior notice to the department, if possible at least 10 days before the date of the bypass. b. Unanticipated bypass. The operator shall submit notice of an unanticipated bypass as required in Part III I. 3. Prohibition of bypass. a. Except as provided in Part III U 1, bypass is prohibited, and the board or department may take enforcement action against an operator for bypass unless: (1) Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage. Severe property damage means substantial physical damage to property, damage to the treatment facilities that causes them to become inoperable, or substantial and permanent loss of natural resources that can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production; (2) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass that occurred during normal periods of equipment downtime or preventive maintenance; and (3) The operator submitted notices as required under Part III U 2. b. The department may approve an anticipated bypass, after considering its adverse effects, if the department determines that it will meet the three conditions listed in Part III U3a. V. Upset. 1. An "upset," as defined in 9VAC25-870-10, means an exceptional incident in which there is unintentional and temporary noncompliance with technology -based state permit effluent limitations because of factors beyond the reasonable control of the operator. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation. 2. An upset constitutes an affirmative defense to an action brought for noncompliance with technology -based state permit effluent limitations if the requirements of Part III V 4 are met. A determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance, is not a final administrative action subject to judicial review. 3. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation. 4. An operator who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs or other relevant evidence that: a. An upset occurred and that the operator can identify the cause of the upset; b. The permitted facility was at the time being properly operated; c. The operator submitted notice of the upset as required in Part III I; and d. The operator complied with any remedial measures required under Part III S. S. In any enforcement proceeding, the operator seeking to establish the occurrence of an upset has the burden of proof. W. Inspection and entry. The operator shall allow the department as the board's designee, the VSMP authority, EPA, or an authorized representative of either entity (including an authorized contractor), upon presentation of credentials and other documents as may be required by law to: 1. Enter upon the operator's premises where a regulated facility or activity is located or conducted, or where records shall be kept under the conditions of this general permit; 2. Have access to and copy, at reasonable times, any records that shall be kept under the conditions of this general permit; 3. Inspect and photograph at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this general permit; and 4. Sample or monitor at reasonable times, for the purposes of ensuring state permit compliance or as otherwise authorized by the Clean Water Act or the Virginia Stormwater Management Act, any substances or parameters at any location. For purposes of this section, the time for inspection shall be deemed reasonable during regular business hours, and whenever the facility is discharging. Nothing contained herein shall make an inspection unreasonable during an emergency. X. State permit actions. State permit coverage may be modified, revoked and reissued, or terminated for cause. The filing of a request by the operator for a state permit modification, revocation and reissuance, or termination, or a notification of planned changes or anticipated noncompliance does not stay any state permit condition. Y. Transfer of state permit coverage. 1. State permits are not transferable to any person except after notice to the department. Except as provided in Part III Y 2, a state permit may be transferred by the operator to a new operator only if the state permit has been modified or revoked and reissued, or a minor modification made, to identify the new operator and incorporate such other requirements as may be necessary under the Virginia Stormwater Management Act and the Clean Water Act. 2. As an alternative to transfers under Part III Y 1, this state permit may be automatically transferred to a new operator if: a. The current operator notifies the department at least 30 days in advance of the proposed transfer of the title to the facility or property; b. The notice includes a written agreement between the existing and new operators containing a specific date for transfer of state permit responsibility, coverage, and liability between them; and c. The department does not notify the existing operator and the proposed new operator of its intent to modify or revoke and reissue the state permit. If this notice is not received, the transfer is effective on the date specified in the agreement mentioned in Part III Y2b. 3. For ongoing construction activity involving a change of operator, the new operator shall accept and maintain the existing SWPPP, or prepare and implement a new SWPPP prior to taking over operations at the site. Z. Severability. The provisions of this general permit are severable, and if any provision of this general permit or the application of any provision of this state permit to any circumstance, is held invalid, the application of such provision to other circumstances and the remainder of this general permit shall not be affected thereby. Statutory Authority § 62.1-44.15:25 of the Code of Virginia. Historical Notes Former 4VAC50-60-1170 derived from Virginia Register Volume 21, Issue 3, eff. January 29, 2005; amended, Virginia Register Volume 25, Issue 16, eff. May 13, 2009; Volume 29, Issue 4, eff. November 21, 2012; amended and renumbered, Virginia Register Volume 30, Issue 2, eff. October 23, 2013; amended, Virginia Register Volume 30, Issue 13, eff. July 1, 2014; Volume 30, Issue 24, eff. July 1, 2014; Errata 31:1 VA.R. 68 September 8, 2014; amended, Virginia Register Volume 35, Issue 19, eff. July 1, 2019. Section 12. Inspection logs (Provide templates for your inspections. Requirements are listed in 9VAC25-880-70, Part II, section B and F.) Issued — 10/2014 Stormwater Pollution Prevention Plan (S WPPP) Albemarle County Record of Site Inspection (Example) (Attach as many sheets as necessary, including maps) Location Control Measure Incident of Non - Complianc a (YIN)' Comments Type Maintenance Req'd (YIN) Additional E&S Controls Req'd (YIN) Name: Title: Date: Signature: If no incidents of Non -Compliance have been noted above, I certify that the site is in compliance with the provisions of the Plan and Permit Record of Site Inspection (Attach as many sheets as necessary, including maps) Control Measure Incident of Non - Additional Location Maintenance E&S Complianc Comments Type Req'd Controls a (YIN)' (YIN) Req'd (YIN) Sectionl Silt fence nearly collapsed along stream — reinforce with super silt Perimeter Controls Y Y N fence along stream as shown on attached map. No material left site. Sediment Sediment volume reaching 50% - schedule clean out this week Trap 1 Y N N before rain predicted for Friday. Sediment N N N Trap 2 SWIM Normal pool too high — check for clogging. Facility 1 Y N N Fueling N N N Area Constructio Dirt is being tracked on County roads. Ensure wash rack is Y N Y operational and being used properly. Remove material on County n Entrance roads and dispose of on -site. Section 2 Temporary Stockpile seeding washed off in recent storm. Re -seed and mulch. Stabilizatio Y N N n Diversion N N N Dikes Minor scouring at the end of riprap at Outfall 2. Extend riprap 10 ft as Outfalls 1-3 Y N N shown on attached plan. Name: Joe Smith Title: Site Superintendent Date: February 12 Si nature: If no incidents of Non -Compliance have been noted above, I certify that the site is in compliance with the provisions of the Plan and Permit