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HomeMy WebLinkAboutWPO202100063 VSMP - SWPPP 2022-05-20 z ....,,of Al,k, COUNTY OF ALBEMARLE .44.rr le, Department of Community Development �� 401 McIntire Road,North Wing "a. Charlottesville,Virginia 22902-4596 �1 i �' Tel. (434)296-5832 • Fax(434)972-4126 Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At: Project Name:DUNLORA VILLAGE Address:Fowler Street,Charlottesville,VA 22901 Prepared by: Name: Roudabush, Gale & Associates Inc., Nicole Jamison Prepared for: Name: Towne District, LLC Charlie Armstrong SWPPP Preparation Date: November 4,2021 Revised: May 18,2022 (This document is to be made publicly available according to 9VAC25-880-70, Part II, section D) 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 General Site Information Adjacent Areas Sequence of Major Activities 4. Erosion and Sediment Control Plan. General Construction Notes for Erosion and Sediment Control Structural and Vegetative Practices 5. Stormwater Management Plan 6. Pollution Prevention Plan. A. Plan Showing Pollution Prevention Activities and Prevention Practices B. Sources of Pollutants,Locations,and Prevention Practices C. Non-Stormwater Discharges D. Person Responsible for Pollution Prevention Practices E. Response and Reporting Practices F. Pollution Prevention Awareness 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. Name of Receiving Waters Measures for Applicable TMDL 8. Qualified personnel 9. Signed Certification 10. Delegation of authority. 11. General permit copy 12. Inspection logs 13. Additional Information and Logs Special Conditions Related to TMDL Grading and Stabilization Activities Log SWPPP Amendment Log Pollution Prevention Training Log Procedure for Spills of Non-Reportable Quantities Factsheets Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 1. Registration statement Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY PERMIT#: GENERAL VPDES PERMIT FOR DISCHARGES OF STORMWATER FROM PLAN/ID#: CONSTRUCTION ACTIVITIES (VAR10) TECHNICAL CRITERIA: IIB ❑ IIC E 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. 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: Towne District, LLC Contact person: Charlie Armstrong Address: 142 South Pantops Drive City, State and Zip Code: Charlottesville,VA 22911 Phone Number: 434-245-0894 Primary and CC Email: CharlesA@southern-development.com cc; njamison@roudabush.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 El 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: Dunlora Village Address: Fowler St. City and/or County and Zip Code: Charlottesville,VA 22902 Construction Activity Entrance Location (description,street address and/or Enter from Belvedere Phase 5 Subdivision, Fowler Street latitude/longitude in decimal degrees): Latitude and Longitude (6-digit, decimal degrees format): 38.074210, 78.450151 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): 80.77 acres Primary estimated area to be disturbed (include portions with Erosion and Sediment Control Plan approval only): 66.27 acres Off-site estimated area to be disturbed (if applicable): D. Property Owner Status: FEDERAL❑ STATE ❑ PUBLIC ❑ PRIVATE ❑x 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): G. Estimated Project Dates (MM/DD/YYYY). Start Date: July 1, 2022 Completion Date: May 311 2024 H. Is this construction activity part of a larger common plan of YES ❑ NO x❑ development or sale? Rev 11/2020 PAGE 1 16 CONSTRUCTION GENERAL PERMIT(VAR10) REGISTRATION STATEMENT 2019 I. 6th Order Hydrologic Unit Code (HUC) and Receiving Water Name(s). Include additional areas on a separate page. HUC NAME(S)OF RECEIVING WATERBODY JR14 (020802040401) Meadow Creek-Rivanna River JR08 (020802040203) 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): Latitude and Longitude (6-digit, decimal degrees format): Is this off-site activity an excavated material disposal YES ❑ NO ❑ area? If this off-site activity is an excavated material disposal area, list the contents of the excavated fill material: Will a separate VPDES permit cover this off-site activity? YES ❑ NO ❑ 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 YES © NO ❑ submitted to the VESC Authority for review? Erosion and Sediment Control Plan Approval Date(for the estimated area to be disturbed MM/DD/YYYY): C. Has land-disturbance commenced? YES ❑ NO ❑x 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 I): 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 Ill. 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 storm water 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 storm water 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 storm water pollution prevention plan or comply with other permit conditions). In the context of storm water 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(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. 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: Charlie Arm trong Signature (signed in ink): Date Signed: 5/19/22 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 Authority, please send to: Department of Environmental Quality The Local VSMP Authority (insert address below) Office of Stormwater Management Suite 1400 Albemarle County PO Box 1105 Department of Community Development Richmond VA 23218 401 McIntire Rd. constructiongp@deq.virginia.gov Charlottesville, VA 22902 Rev 11/2020 PAGE 3 16 Section 2. Notice of general permit coverage his notice is to be posted near the main entrance according to 9VAC25-880-70, Part II, sectionC. Issued— 10/2014 Stormwater Pollution Prevention Plan(SWPPP)Albemarle County Section 3. Nature of activity ENERAL SITE INFORMATION: This development is comprised of an 80.77 ac farm parcel.and is a portion of TMP 62-16a. The parcel is comprised of an existing plantation house,accompanying slave quarters,and would include the removal of the existing supporting infrastructure. Known infrastructure consists of various out-buildings,private utilities, including power poles and services, well and septic drain-fields. In particular,the slave quarters shall be refurbished and moved to a new permanent location. Additionally,a small family cemetery will be preserved in its original location. The development project and subsequent land disturbance area for improvements to this 66.27-acre land disturbance area contains numerous mature trees most all of which will require removal, as depicted on the existing conditions and erosion control plans.These plans propose approximately 270 single family and townhouse parcels to be implemented in 4 phases. The disturbed area currently contains some steep slopes to be impacted with public facilities need for development of the parcels. In particular,road construction,utilities,and required, permanent storm sewer are located just-into or immediately adjacent to steep slopes,wetlands and the resource protection buffer. Heavy vegetation removal,earth moving and clearing will be required to install the permanent storm-water management facilities and sediment trapping facilities. Most of the slopes within the disturbed area range between 5%and 24%,and the head of wetlands located at the site outfall locations shall be controlled with super silt fence; install outlet protection,temporary diversions,sediment trapping facilities and perimeter protections,as appropriate. There are adjacent wetlands to remain and are to be protected by super silt fence barricade shall be utilized to delineate areas of non-disturbance and shall be installed as needed to define and protect. See COE permit for specifics relating to approved wetland or W.U.S. impacts. Special attention shall be placed upon stabilization of all cut&fill slopes along the site perimeter,ensuring that all runoff potentially acquirable is directed into the sediment trapping facilities at all times. The storm runoff analysis is quantified for the entirety of this development.Sustainable management of this site includes numerous sediment basins and traps,sized to capture most of the runoff during cut and fill operations. Sediment trapping facilities that are to become permanent shall be de-mucked,re-graded,stabilized and converted to the permanent BMP facility per specifications,and ensuring that the required pond volumes are provided. Refer to SWM conversion details. 'MP conversions shall not take place until the entire contributing upstream watershed is stabilized. Sand filtration systems call be kept offline until upstream stabilization of the contributing drainage area is completed. Phase 1 of the subdivision shall utilize a level 1,filtration(spec 12)and includes downstream level 1 extended detention facility including runoff reduction to capture,treat and convey most of the managed turf and impervious surfaces proposed within this phase. In combination with preserved open space dedication,the proposed BMP will facilitate the water quality and quantity requirements(channel and flood protection,as required for the entirety of phase 1 within this development. Phase 2 of the subdivision shall utilize a level 1 filtration device(spec 12)to treat and convey the acquirable managed turf and impervious surfaces proposed within this phase. This measure will ultimately connect to another phase 2 storm-water filtration facility with runoff reduction.Additionally,the phase 1 &2 measures will facilitate the water quality and quantity requirements(channel and flood protection, as required for the entirety of phase 1 and 2 of this development.The lower portion of the cul-de-sac,unmanaged by the BMP,will require conversion of the sediment trap into a managed outfall location with a level spreader appropriately sized for returning the concentrated release into sheet-flow. Phase 3 of the subdivision shall utilize a level 1 filtration(spec 12)facility to capture,treat and convey a large portion of the managed turf and impervious surfaces proposed within phase 3 and phase 4. The upper and lower filtration measures together will facilitate the water quality and quantity reduction requirements(channel and flood protection, as required for the final phases of this development. In addition to providing runoff treatment, Dunlora Village WPO provides a total of 14.5 acres of preserved-undisturbed open space for dedication and restriction to land disturbance. The preserved areas consist of the designated steep slope areas and remote perimeter areas surrounding the lots and open space where remaining undisturbed. ADJACENT AREAS: here are multiple environmentally sensitive areas to remain onsite;to include the adjacent Rivanna River and tributaries ..sere to;wetlands and steep slopes located immediately adjacent to the disturbance also exist and shall be protected to remain. Perimeter erosion control measures must be properly maintained to prevent unintended impacts to any offsite areas,and prevent any sediment laden water from entering the offsite watershed. Issued— 10/2014 Stormwater Pollution Prevention Plan(SWPPP)Albemarle County SEOUENCE OF MAJOR ACTIVITIES: I-IASE 1 1. Contractor shall coordinate inspections,as required by the VSMP permit prior to any site clearing or grading operations. 2. Contractor to install construction entrance,tree protection,perimeter silt fencing,staging areas and SWPPP measures- as first step in construction. 3. Clearing and grubbing shall first be limited to that necessary to install perimeter control devices,the temporary sediment traps, basins,earthen berm construction including outfall structures,outlet protection. Riser and modified outlet protection at any and all concentrated outfall locations. 4. Install additional perimeter controls: such as silt fence,super silt fence and diversion dikes as necessary to direct sediment latent runoff to each trap and basin. 5. Sediment basin shall be made functional prior to any onsite grading or grubbing operations. PHASE 2 1. Clear and grub the remainder of the site to begin the earthwork operations as necessary to achieve final grades. 2. Soil stockpiles shall be located in areas that will not interfere with construction phases and at least 15 feet away from areas of concentrated flows or pavement.The side slopes of the stockpile will be roughened by equipment tracking and will not exceed 2:1 and shall have silt fence installed along the perimeter toe. 3. Denuded areas shall drain to an approved erosion control measures at all times during construction. 4. Install utilities and complete access road stabilization and construction. 5. Install storm sewer inlets, pipes and culverts as phased,ensuring that all denuded areas drain to an approved sediment trapping device at all times. 6. Lime,fertilize and apply temporary or permanent seeding to all denuded areas immediately after achieving final grades. 7. After the contributing area to each trap or basin is fully stabilized,and prior to applying topcoat asphalt to the paved areas, obtain approval from the erosion control inspector to convert and deconstruct sediment traps or convert sediment basins to the permanent SWM/BMP facility. See conversion details and specifications for each of four basin conversions. 8. Permanent or temporary soil stabilization shall be applied to all denuded areas within seven days after final grade is reached on any portion of the site.Temporary soil stabilization shall be applied within fourteen days to denuded areas that may not be at final grade but will remain dormant for longer than 30 days.Permanent stabilization shall be applied to areas that are to be left dormant for more than one year. 9. Prior to any de-construction of ESC measures,coordinate their removal with the appropriate inspector. Particularly, sediment trap#8 shall not be removed until the storm sewer and accompanying outfall are re-directing towards sediment basin#2. 10. .Convert sediment basins to permanent SWM facilities per specifications ensuring adequate volumes and slopes are functional to final design specification. Install sand filters and install dewatering holes per specifications. Remove silt fencing, inlet protection and other remaining erosion control measures.Ensure level spreaders and all permanent outlet protection are stabilized and sustainable. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 4. Erosion and Sediment Control Plan. (Provide a reduced, 1 1 x 17 copy of the latest Erosion and Sediment Control Plan. Do not reference only.) Approved erosion and sediment control plans for Dunlora Village are incorporated by reference as part of this Storm\\ater Pollution Prevention Plan. Approved plans are included in this SWPPP binder. GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL: 1. The purpose of the erosion control measures shown on these plans shall be to preclude the transport of all waterborne sediments resulting from construction activities from entering onto adjacent properties of state waters. If field inspection reveals the inadequacy of the plan to confine sediment to the project site,appropriate modifications will be made to correct any plan deficiencies. In addition to these notes, all provisions of the Virginia Erosion and Sediment Control Regulations shall apply to this project. 2. All erosion and sediment control measures shall be installed and maintained in accordance with the Virginia Erosion and sediment Control Handbook(3`d Edition, 1992)and Virginia Regulations 9VAC25-840 Erosion and Sediment control Regulations. The contractor shall be thoroughly familiar with all applicable measures contained therein which may be pertinent to this project. 3. All points of construction ingress and egress shall be protected by a construction entrance to prevent tracking of mud onto public right-of-way. An entrance permit from VDOT is required prior to any construction activities within state rights-of-way. Where sediment is transported onto a public road surface,the road shall be thoroughly cleaned 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. 4. A copy of the approved erosion and sediment control plan shall be maintained on the site at all times. 5. Sediment basins and traps,perimeter dikes,sediment barriers,and other measures intended to trap sediment onsite must be constructed as a first step in grading and be made functional before upslope land disturbance takes place. Earthen structures such as dams,dikes,and diversions must be seeded and mulched immediately after installation. Periodic inspections of the erosion control measures shall be made to assess their condition. Any necessary maintenance of the measures shall be accomplished immediately upon notification by the SWPPP Inspector and shall include the repair of measures damaged by any subcontractor including those of the public utility companies. 6. Sediment traps and sediment basin 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(see sizing table for dimensions). 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. 7. 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. Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County 8. All disturbed areas are to drain to approved sediment control measures at all times during all land disturbing activities and during site development until final stabilization is achieved. 9. Sediment control measures may require minor field adjustments at time of construction to ensure their intended purpose is accomplished. Division of code compliance approval will be required for other deviations from the approved plans. 10. Concentrated runoff shall not flow down cut or fill slopes unless contained within an adequate temporary or permanent channel,flume or slope drain structure. 11. The contractor shall place soil stockpiles at the locations shown on the SWPPP plan sheet for each area of construction, or as directed by design engineer. During construction,soil stockpiles shall be stabilized or protected with sediment trapping measures immediately. Offsite waste or borrow areas shall be approved by the division of code compliance prior to the import of any borrow or export of any waste to or from the project. 12. Prior to commencing land disturbing activities in areas other than indicated on these plans(including,but not limited to,offsite 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. 13. Permanent or temporary soil stabilization must be applied to all denuded areas within 7 days after final grade is reached on any portion of the site. Temporary soil stabilization shall be applied within seven days to denuded areas that may not be at final grade but will remain dormant for longer than 14 days.Permanent stabilization shall be applied to areas that are to be left dormant for more than one year. Soil stabilization measures include vegetative establishment,mulching and the early application of gravel base material on areas to be paved. Contractor shall establish a stabilized site and not allow any erosion or sediment to exit. 14. If disturbed area stabilization is to be accomplished during the months of November,December,January or February, stabilization shall be accomplished by permanently seeding the area with a seeding mixture that includes the seasonal nurse crop for the Piedmont area,which is Winter Rye. See Table 3.32-D for a list of site-specific seeding mixtures for the Piedmont area. This is in accordance with Specification 3.32 from the Virginia Erosion and Sediment Control Handbook(VESCH). The seeding area will also need to be mulched in order to assist the growth of the seeding in the winter months(Specification 3.35 of the VESCH).For temporary seeding stabilization during these months,a 50/50 mix of annual ryegrass and winter ryegrass,as well as a mulching cover should be put down according to Specification 3.31 of the VESCH,Table 3.31-B. 15. The term seeding,final vegetative cover or stabilization,on this plan shall mean the successful germination and establishment of a stable grass cover from a properly prepared seedbed containing the specified amounts of seed, lime,and fertilizing in accordance with Specification 3.32, permanent seeding. Irrigation shall be required as necessary to ensure establishment of grass cover. 16. Underground utility lines(water, sewer,power,cable,or gas)shall be installed in accordance with the following standards in addition to other applicable criteria. a.No more than 500 linear feet of trench may 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 off-site property. d. Material used for back filling 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. Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County 17. Cut and fill slopes shall be designed and constructed in a manner that will minimize erosion. Slopes that re found to be eroding excessively within one year of permanent stabilization shall be provided with additional slope stabilizing measures until the problem is resolved. 18. All storm sewer inlets that are made 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. 19. Before newly constructed storm water 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. 20. 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 administrator. Trapped sediment and disturbed soil areas resulting from the disposition of temporary measures shall be permanently stabilized to prevent further erosion and sedimentation. STRUCTURAL AND VEGETATIVE PRACTICES: The following erosion and sediment control structural and vegetative practices will be incorporated on the project site: 1. Construction Entrance(3.02)-A temporary construction entrance shall be installed at the site entrance as shown on the erosion and sediment control plan. 2. Construction Road Stabilization(3.03)-Access roads,parking areas and other on-site vehicle transportation routes shall be stabilized with stone immediately after grading. '' Silt Fence(3.05)- Silt fence barriers will be installed to filter runoff from sheet flow as shown on the erosion and sediment control plan. 4. Safety Fence(3.01)-A temporary safety fence shall be erected to prohibit public access to the project area and around sensitive areas to protect them from construction traffic. 5. Diversion Dikes(3.12)-A system of diversion dikes to direct flow into the sediment trap will be installed as shown on the erosion and sediment control plans. 6. Sediment Basin(3.14)-A sediment basin is to be constructed as shown on the erosion and sediment control plan. Calculations for the sediment basin are shown with the erosion and sediment control detail for the sediment basin. 7. Sediment Traps(3.13)-A temporary sediment trap is to be constructed in conjunction with culvert inlet protection. Calculations for the sediment trap are shown with the erosion and sediment control details. 8. Inlet Protection(3.07)- Inlet protection will be installed at all proposed storm drain inlets installed prior to final stabilization of the site. 9. Outlet Protection(3.18)-Outlet protection will be installed at the end of all storm sewer pipes. Calculations for the outlet protection are shown with the erosion and sediment control details. The riprap should be checked periodically to ensure scouring is not occurring beneath fabric underlining of the riprap layer. 10. Dust Control(3.39)-Dust control methods must be used to reduce the amount of airborne dust during all phases of construction where soil is exposed or disturbed. 11. Permanent(3.32)-Areas brought to final grade or those construction areas that will remain dormant for a year or more shall be stabilized with a permanent seed mixture acceptable to that time of year.Prepare surface with approved treatment and additives prior to applying seed. 12. Temporary Seeding(3.31)- Areas not brought to final grade for a period of more than 14 days shall be stabilized with a temporary seed mixture acceptable for that time of year. Crimping,punch roller-type rollers,or track walking may be used to incorporate straw mulch into the soil on slopes if straw is to be used. 13. Mulching(3.35)-Plant residues or other suitable materials shall be applied to disturbed surfaces to prevent erosion and reduce overland flow velocities. This practice should be applied to all seeding operations,other planter materials which do not provide adequate soil protection by themselves,and bare areas which cannot be seeded due to the season but which still need protection to prevent soil loss.Crimping, punch roller-type rollers,or track walking may be used to incorporate straw mulch into the soil on slopes if straw is to be used. 14. Tree Preservation and Protection(3.38)-The tree fence barrier will be installed to protect the trees outside of the limits of disturbance as shown on the erosion and sediment control plan. Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County I�n II'i�l I, ? InII�Il�nl II III lI1IhlIIIIIjII pii,l pII I q �IUI AIM IIIII IIIII III III I ullr ci 1 II ominillll I lummNll I II III nlllnunll nimnleimiunu 1j u I I�IIIIIIIIIT�II Ipl4 IIIIII IIII Iql 111 4 iI II II I' II 1`1` Illtll �f I III IIIIIIInn�1. IIIIII„„,„,,,IIIII 11 IIIIIIIn,,,1„,nplllllll L.ill) 1�I, 1111111111111111111111 IIIIIIIIIIIIIIIIIIIII'4II Ilul. IIIIIIIIpnI�Vlll IIIIIIIIIiIIIIIIIIINIIIII il c VSMP & SWM PLAN IN Nwi`. WPO#2021 00063 i o � � vs aN�o ww wz zQ TMP 62-16A RIO MAGISTERIAL DISTRICT, COUNTY OF ALBEMARLE, VA SITE DATA ipp.. . E L B ANN P PHI W PS �� PHILIPS WING TRUST / ETAL C/O CAROLINE MOLINA-RAY {I L- 6704 MENCHACA ROAD J UNIT 33 f AUSTIN TX 78745 DEVELOPER SOUTHERN DEVELOPMENT GROUP INC �" \ / 142 SOUTH PANTOPS DRNE / CHARLOTTESMLLE VA 22911 � P i { Sheet List Table PLAN PREPARER ROUDABUSH GALE 8ASSOCIATES 999 SECOND STREET NV VA 22902pilk ., 7 '� (4341-977-02(6 Sheet Number Sheet Title TAX MAP PARCEL No OE200-0OLC�.'16AC ,,' 9EL E jE / I 1 COVER SHEET TCTAL PARCEL AREA 8C 77 AC(PORTION OF TMP 62-16A) %QE4. 2 PROJECT NOTES 8 OVERALL PLAN �p3 SOIL.8 EMTING CONDMON PLAN ZONING R4 RESIDENTIAL ,St 0',, _j BELVEDERE eE / 4 CONSTRUCTION ACCESS 8 DEMOLITION PLAN z v,v, �y . 1 5 EROSION B SEDIMENT CONTROL NARRATNE n z W CURRENT USE 2 EXISTING SINGLE FAMILY DETACHED(SfD)HOMES i6y� - l R4 STANDARD DENSITY 4 DU/AC , 1 I / 6 EROSION 8 SEDIMENT CONTROL PLAN-PHASE ¢M M w O SITE 7 EROSION 8 SEDIMENT CONTROL PLAN-PHASE II O 8 0 ALLOWABLE UNITS 4 DU/AC-323 D U LOCATION 8 EROSION&SEDIMENT CONTROL DETAIL Z==Z PROPOSED USE PHASE 1 697 641 S F=16.02 ACRES TOTAL 1 / 9 SEEDING NOTES&DETAILS O U 571 773 S F .13 13 ACRES LOT AREA]77 R-4 LOTS-20 ATTACHED UNITS] ' 46 125.868 S F=-2 89 ACRES ROW AREA 10 PRE-DEVELOPMENT DRAINAGE MAP PHASE 2 �'.`'' '/- 2P/ \ 11 POST-DEVELOPMENT DRAINAGE MAP o 0 848.122 S F=19A7 ACRES TOTAL _H' 12 STORMWATER OUTFACE COMPLIANCE 5 706 791 S F 1623 ACRES LOT AREA '`,'^'fj}� 141 331 S F=3 24 ACRES ROW AREA / f „, 13 SB7 8 SWM POND CONVERSION PHASE 3 _ `I \ 14 S82 8 SWM POND CONVERSION 585 701 S.F 13.45 ACRES TOTAL i Q,p / 15 SB3 8 SWM POND CONVERSION m 501 367 S F -11 51 ACRES LOT AREA R- 84 334 S.F =.1 94 ACRES ROW AREA - -.J��, / 16 6B4&SWM POND CONVERSION �,_iv - PFIASE 4 ___. 289.544 S F =6.65 ACRES TOTAL _ 1 17 STORMWATER MANAGEMENT DETAILS w 216 101 S F -4.96 ACRES LOT AREA 1 18 LAND USE ANALYSIS O = 73443SF --1.69 ACRES ROW AREA ''' 1. —' / $ / 19 BASIN 8 STORMWATER DETAILS REQUIRED OPEN SPACE 25%MIN PER ZONING(PER PHASE) �.\ N TOTAL SHEETS=19 9 4.00 Acres-PHASE t ' 4.87 Acres-PHASE 2 " 3.36 Acres-PHASES yTx of 1.6E Aces-PHASE a '1 1/4‘. l7 c, H FOFEST/OPEN SPACE DEDICATED 14.5 ACRES ` _ C HUC NUMBER 02080204 .� p M/ 1P \ 2 CN1OPM Walloon C lligon i OFFSITE NUTRIENT CREDITS 16.33 LBS/ACIYR NUTRIENT CREDITS FROM -• uc.NO g OFFSITE NUTRIENT BANK ISLAND HILL SUBDIVISION p]te72 -17 1 LBS/ACNR ORIGINAL �a I II YU..„, 05 Y2,22 Ae°}� 1685 LBS CREDITS REMAINING - - - _ _- -- an FOREST OPEN SPACE EASEMENT CCIRCUIT COURT OFFLWANNA VA INST.210001961 VICINITY MAP SCALE:1e=1000 FEET k w A (R V w 0 J w z w Q a CC r w g w v O > O l o J Z w E APPROVALS o 7 DEPANTIEN► SIGNATURE DATE oEPANI►IBt OF 0016AUNIry DEVHDPI IT' B OINEEN IG CATE '.2 NCV 2 ,Q J SCALE I DCC' INSPECTIONS �, ,i08. 20,-674 if C] WPC CC11100'065 el _ _E. CF _ 0 �- -- `_ SITE DATA r. I ,1/ [" - /I I PROPOSED IMPERVIOS AREA 275 ACRES V TMP 62A3-1 B i NEW BELVEDERE INC I I I PROPOSED MANAGED TURF AREA 4144 ACRES '� p( ZONING MAD / ) .'' OPEN SPACE FRONDED 14.5C ACRES C F TMP 62-160 / I \ MAGISTERIAL DISTRICT RIC MAGISTERIAL DISTRICT C V NEW BELVEDERE INC E z ZONING. R4 TMP 62-2C \ CRMCAL SLOPES PRESERVED 8 MANAGED SLOPES SHOWN PER APPROVED STEEP SLOPE o w �+�; ini l ) COUNTY OF NINGNM ALBEMARLE \ EXHIBIT BY ROUDOABUSH GALE 8 ASSOCIATES DATED 03,23,21 O F Q I ;.`^.F / I THERE SHALL BE NO DISTURBANCE BUILDINGS SITES OR STRUCTURES ❑ T m 3 PROPOSED PERMITTED OR ALLOWED ON ANY EXISTING SLOPES GREATER G7 m 5 zo N A ail TMP 62F1-0 ,d, \ \ THAN 4 t PRESERVED STEEP SLOPES ARE SHADED.SEE LEGEND �1' r7 w 11aU DUNLORA COMMUNITY i�a 0 z Qo z ASSOCIATIONC INC / -- V T STORMWATER MANAGEMENT (5)LEVEL 1 FILTRATION FACILITY(SPECIFICATION*12) Cif ¢ti 8i-a ZONING R4 / 1 „ (1)LEVEL I EXTENDED DETENTION FACILITY(SPECIFICATION 415)• ►a 1 F�+ aN SWM A �� ( • \ WATERSHED THE SITE LIES IN THE RNANNA RIVER WATERSHED 1 /� \ 1 PHASE I i 14.5 AC.OPEN SPACE ',t' HLID• H CB 02080204 HLILt2 020e024040' 1111111' ® \l \ �"' i PHASED MINIMUMS +. \ BOUNDARY SOURCE ALTA SURVEY PREPARED JULV 24 2020 BY RODUABUSH GALE INC 0 �� �� 1 PHI=4.0 AC. ASSOCIATES INC p4 f / PH II=4.0 AC. 1 ' TOPOGRAPHY• FILTTERED BY ROUDAB SH TH DEM FROM DGAI F AND ASSOCIATES INCI POINT CLOUD DATA i PH III=4.0 AC. i + BENCHMARK SURVEY FROM FIELDWORK PERFORMED - I / PH IV=2.5 AC. . UNN2020 BYROUDABSHGALE AND ASSOCIATES INC / d SWAB V DATUM HORZ NAVD 83 VERT NEED 88 /arr • j / FLOODPLAIN A PORTION OF THE PROJECT SITE SHOWN HEREON IS LOCATED WITHIN FLOOD / HAZARD ZONE"AV FOR A 100-YEAR FLOOD AS SHOWN ON FEMA MAP PHASE I I 51003CO279D EFFECTIVE 2r3/2005 DETERMINATION HAS BY _SWM C --�--J GRAPHIC METHODS NO ELEVATIONTHIS STUDY HAS BEEN PREFORMEDBEEN ASMADE A -- PORTION OF THIS PROJECT STREAM BUFFER THERE ARE STREAM BUFFERS LOCATED ON THE PROJECT SITE NC IMPACTS ARE PLANNED OR ANTICIPATED ,I I f PHASE III HISTORICAL SIGNIFICANCE COORDINATION WITH FOR PRESERVATION OR RELOCATION OF EXISTING STRUCTURES AND/OR ARTIFACTS SHALL BE DIRECTED BY THE OWNER CEMETERIES AN EXISTING CEMETARY EXISTS WITHIN THE SUBJECT PARCEL AND WILL z REMAIN F z z 1 ,, P HAS E I V I THE SUBJECT PROPERTY IS NOT LOCATED WITHIN AN AGRICULTURAL-FORESTAL DISTRICT. El III,0 r TMP 62-16C THIS SITE IS NOT LOCATED WITHIN THE WATERSHED OF A COUNTY PUBUC WATER SUPPLY RESERVOIR o y U it t l N/F MORGOGLIONE, THERESA E OR JOHN D SCHIJIE G > ZONING R4 �� �4NF S ¢a-. ( ¢ o w I LI s s 250 0 250 500 750 // SITINCtim SO a'1\// ,/ - SCALE 1-.250. - _ -__ -- _ ,-4-,N 0 2 -n z ALBEMARLE COUNTY FINAL PLAN GENERAL NOTES GENERAL CONSTRUCTION NOTES �.Rs' of PTA 1 PRIOR TC ANY CONSTRUCTION WITHIN ANY EXISTING PUBLIC RIGHT-OF-WAY INCLUDING 1C TRAFFIC CONTROL OR OTHER REGULATORY SIGNS OF BARRICADES SHALL BE IN STAUFD BY THE p p CONNECTION TC ANY EXISTING ROAD A PERMIT SHALL BE OBTAINED FROM THE VIRGINIA DEVELOPER WHEN IN THE OPINION OF THE COUNTY ENGINEER OF DESIGNEE THEY ARE DEEMED ;Z 'y DEPARTMENT OF TRANSPORTATION(SOOT)THIS PLAN AS DRAWN MAY NOT ACCURATELY NECESSARY IN ORDER TO PROVIDE SAFE ANC CONVENIENT ACCESS - C REFLECT THE REQUIREMENTS OF THE PERMIT WHERE ANY DISCREPANCIES OCCUR THE 11 THE SPEED LIMITS TO BE POSTED ON SPEED LIMIT SIGNS ARE 5API-BELOW THE DESIGN SPEED I / • REQUIREMENTS OF THE PERMIT SHALL GOVERN OR AS DETERMINED BY VD°T FOR PUBLIC ROADS Christopher C Mulligan 12 VDOT STANDARD CD-1 OR CD-2 CROSS-DRAINS UNDER TO BE INSTALLED UNDER THE SUBBASE lie.No 2 ALL MATERIALS AND CONSTRUCTION METHODS SHALL CONFORM TO CURRENT SPECIFICATIONS MATERIAL AT ALL CUT AND FILL TRANSITIONS AND GRADE SAG POINTS AS SHOWN ON THE ROAD ;d A COUNTY OF ALBEMARLE i 031672 AND STANDARDS TA ION CONTROL UNLESS OTHERWISE NOTED PROFILES W.--in'_); Depnnuem of community Developtnnt r 05n2 22 A..4 s. 3 EROSION AND SILTATION MEASURES SHALL BE PROVIDED IN ACCORDANCE WITH THE 13 A VIDEO CAMERA INSPECTION IS REQUIRED FOR ALL STORM SEWERS AND CULVERTS THAT ARE1.45.0 4414v41.s4 APPROVED EROSION CONTROL PLAN AND SHALL BE INSTALLED PRIOR TO ANY CLEARING GRADING OR OTHER CONSTRUCTION DEEMED INACCESSIBLE TO VDOT OR COUNTY INSPECTIONS THE VIDEO INSPECTION SHALL BE Construction Record Drawings(As-built)for VSMP 4 ALL SLOPES AND DISTURBED AREAS ARE TO BE FERTILIZED SEEDED AND MULCHED CONDUCTED IN ACCORDANCE WITH VDOTS VIDEO CAMERA INSPECTION PROCEDURE ANC WITH A 5 THE MAXIMUM ALLOWABLE SLOPE IS 2 1(HORIZONTAL VERTICAL)WHERE REASONABLY VDOT OR COUNTY INSPECTOR PRESENT OBTAINABLE LESSER SLOPES OF 3 1 OR BETTER ARE 70 BE ACHIEVED The following is a list of information required on construction record drawings for 6 PAVED RIP-RAP OR STABILIZATION MAT LINED DITCH MAY BE REQUIRED WHEN IN THE OPINION OF stormwater facilities(reference Water Protection Ordinance 17-422) it is preferable that the THE COUNTY ENGINEER OR DESIGNEE IT IS DEEMED NECESSARY IN ORDER 70 STABILIZE A construction record drawing be prepared by someone other than the designer Please do not W DRAINAGE CHANNEL ALBEMARLE COUNTY ESC NOTES provide design drawings as construction record drawings Z 7 ALL TRAFFIC CONTROL SIGNS SHALL CONFORM WITH THE VIRGINIA MANUAL FOR UNIFORM TRAFFIC CONTROL DEVICESCD B UNLESS OTHERWISE NOTED ALL CONCRETE PIPE SHALL BE REINFORCED CONCRETE PIPE-CLASS A A signed and dated pmfessrunal seal of the preparing engineer or surveyor I SILT FENCE SEDIMENT TRAPS AND OTHER PROTECTIVE MEASURES SHALL BE PROVIDED IN AREAS CL R WHERE SEDIMENT FROM DISTURBED AREAS MAY LEAVE THE SITE AND MST BE PROPERLY INSTALLED B The name and address of the him and individual prcpanng the drawings on the title shell. 9 ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS BEFORE LAND DISTURBANCE THESE MEASURES MUST REMAIN INSTALLED ANC MAINTAINED UNTIL C The constructed Iseauon of all items associated with each Iacthty,and the Incpectarm records to verify LEGEND J FOR THE CONSTRUCTION INDUSTRY(29 CFR PART 192E) dimensions.muenals ami m.callanon The ilemn include.bul arc riot lunmed to the(olloxtn J ADEQUATE STABILIZATION IS ACHIEVED AS DETERMINED BV THE PROGRAM AUTHORITY pro er g- Q GENERAL CONSTRUCTION NOTES FOR STREETS(THIS LET IS IN ADDITION TC THE GENERAL 2 ALL EROSION MEASURES ARE SUBJECT TC INSPECTION PERIODICALLY ANC ASTER EACH I Inspection Records and photographs for pipe trenches and bedding including underd ems RUNOFF-PRODUCING RAINFALL EEVENT ANY NECESSARY REPAIRS TO MAINTAIN THE EFFECTIVENESS 2 Video Pipe Inspection for am pipes whlah are not aceessthle or viewable LLf CONSTRUCTION NOTES EXISTING INTEPMEDIATE CONTOUR EXETING WATERLINE CF THE EROSION CONTROL DEVICES ANC CLEANUP CF SEDIMENTATION MUST BE MACE IMMEDIATELY v t plated Location w ah gee-co ordinates of all faCllities O CONSTRUCTION INSPECTIC N CF ALL FRCFOSEC ROADS WITHIN THE CEV'ELCF MENT WILL BE MACE IF EECC DCNTFCL MEASURES AVE POLING TC EE INACEGL''AT G CF IN NEED CF REPAIR Es A 4 Verified Drainage Area maps lily the drainage area treated.and for drainage In the facilities EXISTING INDEX CONTOUR ---- --- PROPOSED WATERLINE - :CLINT,INSPECT:V J..WILL EE NCTI NEC A FEE CF 3 tSI LYE C-ARGEC F_R EPC� Curren)physical and lu ra w suite)for all earthen structures Ponds should include a surveyCI- BY THE CCL'NTY THE CONTRACTOR MUST NOTIFY TFE DEPARTMENT CF COMMUNITY REINSFECTICN TEAT L NECESSARY 5 P PROPOSED CONTOUR EXISTING FIRE HYDRANT _zr CEVELCFMENT(29e-58C2,4E HOURS IN ADVANCE CF THE START OF CONSTRUCTION - A TEMPORAcY S7pNE CCNSTRLCTION ENTRANCE STALL EE PRCVI^E'WHEREVER TRAFFIC WILL BE of the pond bottom Surveil should verify pxnld volumes am per design Corrections ma}he reginned KJ UFCN COMPLETICI.CF FINE GRACING ANC PREPARATION OF THE RLACBEC St,'BGRADE TH£ LEAVING A CC NSTRUCTICN SITE ANC WHERE THERE EXISTS 7H ROSS� for aheranons Intm the design EXISTING EDGE OF PAVEMENT PROPOSED FIRE HYDRANT ♦ E (BILIT,CF TRANSPORTING ML'C w CONTRACTOR SI-ALL HAVE CBS TESTS PERFORMED CA THE SL:BGRALE SOIL.THREE IC COPIESD 6 Plants.Neatian and IY PROPOSED EDGE OF PAVEMENT EXETING WATER VALVECC OF THE TEST RESULTS SHALL BE SUBMITTED TO THE COUNTY IF A SUBGRADE SOIL CBF OF 1C OF DILL DEN ONTO A SROAD'T E SITE FHA L AREA Pe _ - > o GREATER IS NOT OBTAINABLE A REVISED PAVEMENT DESIGN SHALL BE MADE BY THE DESIGN 4 ALL DENUDED AREAS E THE SITE SHALL BE STABILIZED C COVER R SUN pt DAYS OF FINAL FCING 7 Plans and profiles of dr for allrueturculverts,Pipes.Risers.Wese and Drainage Structures or ends r Display the EXISTING CURB AND GUTTER PROPOSED WATER VALVE > Z WITH PERMANENT VEGETATION OR P PROTECTIVE GFOUNL COVER SUITABLE FOR THE TIME OF vEAF installed typef dame a rtactures cuheN i size.weirs.materials inlets or end Ircaimrnusl SG� O Z ENGINEER AND SUBMITTED WITH THE TEST RESULTS FOR APPROVAL Tn g P S PROPOSED CURB AND GUTTER ---- -- ----- PROPOSED WATER METER EMPORARI SOIL AL GRADE BU SHALL BE AIN DAPPLIED WITHIN SEVEN(7 DPVS TO DENUDED AREA THAT Inlet and outlet protection h alignment and invert elevations cod and to dent n ., SURFACE DRAINAGE ANC PIPE DISCHARGE MUST BE RETAINED WITHIN THE PUBLIC RIGHT-OF-WAY MAY NOT TPs a F P F - BE AT FINAL GRADE 6VT WILL REMAIN DORMANT(UNDISTURBED,FC'R LONGER THAN THIRTt % ('Om laliORs:For ci ntna'alli del tenon.from design de sealed computation,I4natn.xrnf Ine Ulnl TRANSITION FROM CO•B ROLL-TOP EXISTING REDUCER OR WITHIN EASEMENTS PRIOR TC ACCEPTANCE BY THE COUNTY ALL DRAINAGE OUTFALL pasg gn provide pas y DAYS the as-butt condition t. Ulxalent nr better than desi n PROPOSED REDUCER .. •--- FAEMENI5ARE TO BE EXTENDED TC A BOUNDARY LINE OR A NATURAL WATERCOURSEe'4 g EXISTING STORM SEWER A PERMANENT SOONTHS OF THEGETATIVE COVER SHALL BE ESTABLISHED Oh ALL DENUDED AREAS W 4 GUARDRAIL LJCATIOFE ARE APPROXIMATE EXACT LENGTH LOCATION ANC APPROPRIATE ENE WITHIN NINE(9 MONTHS OF THE START OF CLEARING OR GRADING UNLESS DOCUMENTED IN WRITING ') Ditch Lines-Di+play the construct.]bnanon of all ditch 11nes and channels including lypaaal HANDICAP RAMP tw12) �� TREATMENTS WILL BE FIELD VERIFIED AT THE TIME OF CONSTRUCTION ADDITIONAL GUARDRAIL TO THE PROGRAM AUTHORITY AT THE START OF LAND DISTURBANCE THE NINE(9 MONTHS SHALL BE sections:Ind liningti PROPOSED STORM SEWER �.acic,lic ri� wwsw ��{/ MAY BE REQUIRED AT LOCATIONS NOT SHOWN WHEN IN THE OPINION OF THE COUNTY ENGINEER MEASURED FROM THE PERMIT ISSUANCE DATE IF AN EXTENSION IS NECESSARY ANC CONSTRUCTION III.Easements-Show all platted easements with dead Ixsrk references labeled Facilities and drainage EXISTING SANITARY SEWER OR DESIGNEE IT IS DEEMED NECESSARY WHEN GUARDRAIL IS REQUIRED IT SHALL BE INSTALLED n MARKING INDICATOR. ...rs O 0 CC FOUR(4,FEET OFFSET FROM THE EDGE OF PAVEMENT TO THE FACE OF GUARDRAIL AND EXTENDS FOR MORE THAN A YEAR A PERMIT RENEWAL FEE OF s-5C WILL BE REOUIREL iva le wiIhin platted easement Provide copies of recorded"instructed ents PROPOSED SANITARY SEWER .. - QCL 6 DURING CONSTRUCTION OP THE PROJECT SOIL STOCKPILES AND BORROW AREAS SHALL BE I I Guardrail,fences or other safety pros ititats-Display the"instructed location of all safety PROPERTY LINE BENCHMARK ROADWAY SHOULDER WIDTHS SHALL BE INCREASED TO SEVEN(S)FEET STABILIZED COVERED OF PROTECTED WITH SEDIMENT TRAPPING MEASURES WHERE URBAN CROSS SECTIONS ARE INSTALLED ALL RESIDENTIAL DRIVEWAY ENTRANCES SHALL Pros loons fences guardrail.including the type-length and applied end treatments compared to S. 7 ALL STORM SEWER INLETS THAT ARE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO deli EASEMENT LINE PROPERTY BOUNDARY CONFORM TO VDCT CG-9(A B OR C' THAT SEDIMENT-LADEN WATER CANNOT ENTER THE STORM WATER CONVEYANCE SYSTEM WITHOUT design CENTERLINE — 6 WHERE RURAL CROSS SECTIONS ARE INSTALLED ALL RESIDENTIAL DRIVEWAY ENTRANCES SHALL 12 Material layers-btofiher medu.stone layers sand layer.keyways and cores must be cenfied as to FIRST BEING FILTERED OR OTHERWISE TREATED TC REMOVE SEDIMENT CONFORM TO VOJT STANDARD PE-1 8 ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL NOT BE REMOVED-UNTIL material types a ld depths Include inspection rcpains Mnng or test pit reports and materials LIMITS OF CLEARING GRADING VEHICLES PER DAY COUNT 1.134 VPD 7. COMPLIANCE WITH THE MINIMUM PAVEMENT WIDTH SHOULDER WIDTH AND DITCH SECTIONS AS DISTURBED AREAS ARE STABIUZED AFTER STABILIZATION IS COMPLETE ALL MEASURES SHALL BE ce0rlaanons Blofilter nieda must he an app owed slate mix EXISTING SPOT ELEVATION s SHOWN ON THE TYPICAL PAVEMENT SECTION DETAIL SHALL BE STRICTLY ADHERED TO PROPOSED STREET NAME SIGN DATE NCR 2: REMOVED WITHIN SC DAYS UNLESS OTHERWISE AUTHORIZED ev THE PROGRAM AUTHORITY TRAPPED 13 Access mats-show hKation of access nods.surface trealmou.drainage.etc as applicable PROPOSED SPOT ELEVATION LIDO 5C e PCAC FLAN APPROVAL FOP SUBDIVISIONS IS SUBJECT TO FINAL SUBCNISICN FLAT VALIDATION SCALE . 25C' SEDIMENT ANC THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION CF TEMPORARY I4.Compaction repnrLs arc=mired to verify till compaction In duns EXISTING SIGN iC.'E74 SHOULD THE FINAL FLAT FOR THIS PROJECT EXPIRE PRIOR TC SIGNING ANL RECORCATICN'THENEXISTING TREE DRIP LINELACE APPRCVAL OF THESE PLANS SHALL BE NULL ANC VOID MEASURES SHALL BE PERMANENTLY STABILIZED TC PREVENT FURTHER EROSION ANC SEDIMENTATION 15 Nlanufacturers cerliftcatiolts for proprietary BMP'e centfynng proper installation and functioning PROPOSED SIGN O WFC CCC-00065 9. ALL SIGNS CR OTHER REGULATORY DEVICES SHALL CONFORM WITH THE VIRGINIA MANUAL FOE EXISTING TREE UNIFORM TRAFFIC CONTROL DEVICES ANC THE ALBEMARLE COUNTY ROAD NAMING ANC SANITARY MANHOLE IDENTIFIER PROPERTY NUMBERING ORDINANCE ANC MANUAL 1a PROPOSED TREE OAK STORM DRAIN STRUCTURE IDENTIFIER SHEET CF 9 �Imo '! -\. • •^ / _ \ `.,` / IIM ^w: NA r ! • TMP 6 NG HOLDINGS LLL NEWLS T BE�VED RE E INC ' ;tea_ . �' N/F 6ELVEDERE LA W��� A x.�L OIL: m,_= ZONING R4 ZONING. NrND �j rt�f, ' ; ?� 7,'%r ; , J \/\ ,_: N./; L I k O • SCIL INS i ` oN 39D '• ' �; �'4 y TMP 62F 1- F uuE r o LJ z J. �C� , I ' ,, �� DUNLORA COMMUCIDNITY y s o e D N/TY a NE i ' • I G� ��,I ASSOCIAT/ON INC • . • • I w z h oz°a J ZONING. R4 „ �� o a • 95 I y gg-d r , • `�X', / /// • - i ff`'• I I' I _ ,~ _ • SSWR MH I 6. • • • 1 ��•, • 278 t• i' 39D �- • III I UTILITY POE( I • ' • • �'>� /�. v A\ TMP 62FI-B 1 ' '•rn�,cr+n`c c • -- " --eHE„ =cacsrm. �� '�� -, - I x I i I \ \ \ DUNLORA COMMUNITY •� " ••• , I I I r i b ASSOCIATION INC a t °�� & �} • TMP 62-16A ��\ Z. N \ \ ZONING. R4 + a w WARE • 1 • �� N/F PHILLIPS, E L & ANN P • 'i ` r 1 d ' I i I' — r•,. ••• \ __ ZONING. R4 I I • __ , \ / Lac ____\ i .—J t r,� \ I • .- + I • r v • / / _ - , , , , � - �N_ i' 1� I Cl s s • \ / /l r/ - '� I. //,.. • - 27C` ,� .7 I ,z /I T 1 /' . 26222 /A Ara°CtE, F • I I U U \ : � h GUY WIRE, N \\, f \ \`\' �I / - •�• ___j•' Y I, J, • ssWR wH ¢ 0 )1 Y. / \ 111 I Y 7 � -..• _ n-rr off,;n�Rr zrNc �� ,� Y /• '/.// _ -. \ , ,.. >,\ 1I I \ - �' / rorF BacKENJ �'' Q/ 0' I r1 , _..., \-:\.3 cc \ N * I- 1 11 1 1 II I,.� EUREL'CAPU • '// w�.- i r ; % / / W RI t'l _ _ • • \\ „' . •1 ,I i.. I, I 11 I I I ; - ' �- I 27B /• • JII+, % •//+/ $ • 40E • , I I ,I • L / % ,,d o. • • • • • 1 . 1 UiK r ,�•GUP , InEFY \ '. �. , - 1 / Cn I Pn.C Mulligan ,Or• -__ __ - ___ TMP 62-16C �.R.. j \ " +// )�> Y 1{, 1 r I r i • N/F MORGOGLIONE, THERESA E OR `4 cen2n2 0•lan 44 i mu �� 27C'y " �. y i 1 / JOHN D SCHUTTE °4,ow.v a+ / '' •'• / ' j -' %/ ZONING' R4 • I r .t C / • / / _ ' �' , . / + / SOILS INFORMATION. I 1 I sswR uH . ,V• t �' i' - ) �/•� • // 2C-ALBEMARLE FINE SANDY LOAM 7 TO 15 PERCENT SLOPES 40.801NCHES TO -/ •^o_✓l i - (I �I - f _ - -- -_ - 3-�V • ' RESTRICTIVE FEATURES WELL DRAINED HYDROLOGIC GROUP C CD rf / 1 - / I I • J •'F \ 1. //+ / 1fi-CORDORUS SILT LOAM 0 TO 2 PERCENT SLOPES MORE THAN RE INCHES TC Z ,•'•• • RESTRICTIVE FEATURES SOMEWHAT POORLY DRAINED HYDROLOGIC GROUP E": O f / 4 • .•... •;' .7E-EUOAV LOAM 2 TO 7 PERCENT SLOPES MORE THAN 8C INCHES TC RESTRICTIVE 1 � 1 / // FEATURES WELL DRAINED HYDROLC C GROUP F J ~ • ' / /•/ 27C E..CAV_CAM 7'C E PERCENT SLOPE MOPE TV-AN EC,N_VP_ PE"'PO" - Z z I • • // / .EAT-PE W .:AP NEE v:.RCLCG L GEL'_ E / t F a TMP 62F1-A _3 j / I / _4C GENE C AM 7 PPFCEN PE MC'HE'�PNB IN,.•-P 'C i \\ 0 CL'B DUNLORA LLC 39D • 27B // FaTFICTIVEEEPT•RE_WEL [PAINS Y RCL CAC;FCLP E < - z ZONING R4 I • / // 39C-HAZEL L.,AM 7 TO'S PEFCENT SLOPE..25-4C INCHES TL.FESTFI]TIVE PEAT„HES I j • / EXCESSIVELY DRAINED HYDROLOGIC GROUP E 1, // - ' / /~/ 39p-HAZEL LOAM IS T_25 PERCENT SLOPES 2C-4C INCHES TO RESTRICTIVE 0 x / / / FEATURES EXCESSIVELY CRAINEC HYDROLCGI_GROUP F w • \\ / / / • / /` / 4CE-HAZEL LOAM 24 TO 45 PERCENTSLCPES MORE THAN BC INCHES TO RESTRICTIVE Z • 0.5 / FEATURES EXCESSIVELY CFAINEC HYDROLOGICGROJF B CO ///'ly/I',,V //• 7E-DAN RIVER_CAM;TC 2 PERCENT SLOPES MORE THAN BO INCHES TO RESTRICTIVE O '� -, /,a-E /i/• - --~ • / • / FEATURES WEL_ORAINEC HYDROLCGC GROUP E 0 (n 1 / / �,•6- - 34C / / / T / ' - / 83-CGLVARC FINE SANDY LOAM C TC 2- EFCENT SLOPES MORE THAN Bc INCHES TC // j •.•• / / RESTRICTIVE FEATURES WELL DRAINED HYDROLOGIC GROUP A 39D• , ; / LATE NOV 2 \N TMP 62-16C _ / ioo 0 goo zoo 300 ALE ,cc' .CE C.'E7a i I / '._,� , \ I / / - N/F MORGOGLIONE, THERESA E SCALE 1'=100' W*C '2,2,••-,CCE= / L. OR JOHN D SCHUTTE / ' �� ZONING.' R4 « �'� y i ssWR UH EE 3 CI _ i • - �/ l , 1 I 'may- ,. ! 1 I ., \ on aroma:,•FEH W R_ �� , / ! / I '� \\ - ; ALAT . - E O u , ,, , , , } , ' f 111���/// I 4 (. �} 1/ - ! / PROPOSED CONSTRUCTION \ N - - .� U r "� �. 1 .f��•� ! ACCESS LOCATION .. _ \ ` ' _ „�,- i I 'V r 1� /'r ./ k �� ° c� 0 - - r - - / , , I/1/ \ `a\ i - -- / ' ' Jq Ogg ;, .-- __,_1 I 7-'',,„. ,\ ''\ . \ ''., , „---- , / , (\ I I ( ' . I ! 1 , i ( \ \ / POLE ! '9'rB�i - Wltlri _ , _ PLC[& \ i l , 1 1 O PO�f O s.�O ' ! I / ' �— ��‘ 01�LI E w , .j,,,.___, ' ' ' i ' ,.mot / : / BEECH i— �/ I �u�i ii / f '� /� / / , / , / m 1 s<% gRa,oER sor / / 1i z z j ; - z,;/2; / fL„Y=CLE/ #1. 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I � 1 SSWR AIM / /`/ p TO BE REMOVED-EXISTING BUILDING&ASSOCIATED APPURTENANCES 1(-J�--W Z -- -. .I ( ,/ 0 TO BE REMOVED-EXISTING STRUCTURE V 0 / J / / / 0 T• O BE REMOVED-EXISTING OVERHEAD UTILITY&LINES Oc / /w / L y I ' / /„ / SO TC BE REMOVED-EXISTING ELECTRICAL J wjJ d - I / / f I T:BE REMOVE: EXISTING NAL. /e/ AEATEMENT Cr EXISTING`.ECTI"'TYS'EV ANC DRAIN FIEL: /� - (n \ - I //^ / OO CCNT'nACTCF TC CCCFGIM1ATE REMCVPL CL W °-� 4- / / 0 CC NC'DIE TRLE EXISTING STFLCTLFE TC PE PRESERVEC AVE RELOCATE= U • / / I // /~/ I0 DO NOT DISTURB EXISTING CEMETER"TC BE PRESERVED 0 > U '' f i / j 10 DC NOT DISTURB-EXISTING WALL TO BE PRESERVED J O ..- , \ \ _ i / CC 1 '/ 0 co // / . 0 / ,.„....___)....\ / i� / 1 /77; III ' _.r J1 !r / e/e/ LATE .NCv 2'/ � / / / SCALE OC' 7 .� /�//- \ \ / OB EC 1E74 / WPC CC'.OCGfS r 4 ! - / —5 SSA&MO- .. .EET CF • EROSION AND SEDIMENT CONTROL MINIMUM STANDARDS ACRES UNDER NO CONDITION SHALL C =C Des Pre-Dor NOR SHALL C BE EROSION CONTROL MEASURES 2 MATERIALS AND WORKMANSHIP ALL MATERIALS AND WORKMANHFPSIALLBEIN ACCORDANCE PITH THELATEST REQUIRED TO BE LESS THAN THAT C •RV 1/RE De. Dee Forest Fseesl OR IN THE ESC IMPROVEMENTS CAN ADEQUATELY CONTROL EROSION AND CFFSITE SEDIMENTATION USING DUST EDITIONS OF ACCORDANCE WITH ANOTHER METHODOLOGY THAT(5 DEMONSTRATED BY THE VSMP CONTROLS A CONSTRUCTION ENTRANCE DIVERSIONS SILT FENCE TREE PROTECTION INLET PROTECTION A THE 2016 VCOT ROAD AND BRIDGE SPECIFICATIONS V 1 PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN AUTHORITY TC ACHIEVE EQUIVALENT RESULTS ANC IS APPROVED BY THE BOARD O <- OUTLET PROTECTION AND CULVERT INLET PROTECTION LOCALIZED SEDIMENT TRAPS 8 BASINS ARE INSTALLED B TIE 201R SOOT ROAD AND BRIDGE STANDARDS DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE TEMPORARY SOIL STABILIZATION 0.80(27.82.2419 ec-R)/3.094 ec-tt —17 4 cis Prat INITIALLY TO CAPTURE RUNOFF PRIOR TO DRAINING ONTO STEEP SLOPES OR THE ORIGINAL OUTFALL LOCATION C APPUCALEC200T/OFALBEMARLERLE ORDNANCS AND PROTECTINMANWL SHALL BE APPUED WITHIN SEVEN DAYS TO DENUDED AREAS THAT Y NOT BE AT FINAL GRADE RUT WILL D. DE LATEST CURRENTDE 2015 REVISION OFREGULATIONS S ORDINANCES PROTECTION TON MAY GRADING OPERATIONS INVOLVE EXTENSIVE CUT AND FILL OPERATIONS IN PREPARATION OF THE BASIN E TIE LATEST RULES AND REGAATION GOVERNING CONSTRUCTION DEMOLITION AND EXCAVATION AS ADOPTED BY REMAIN DORMANT FOR LONGER THAN 30 DAYS PERMANENT STABILIZATION SHALL BE APPLIED TC AREAS ESC MINIMUM STANDARDS CONTINUED ROADWAYS ANC BUILDING PAC SITES INSTALLATION OF THE TREE PROTECTION SILT FENCE ANC SEDIMENT THE SAFETY CODES COMPASSION OF THE COMONA'1EALTH OF VIRGINIA AND 04A THAT ARE TC BE LEFT DORMANT FOR MORE THAN ONE YEAR CONTRACTOR SHALL ESTABLISH A TRAPS OR BASINS SHALL OCCUR AS THE FIRST MAJOR STEP IN CONSTRUCTION AND PRIOR TO ANY ADDITIONAL STABILIZED SITE ANC NOT ALLOW ANY EROSION OF SEDIMENT TO DOT 1 STORMWATER MODELED TC INCLUDE POND ROUTINGS DEPICTING THE REQUIRED RUNOFF REDUCTION GRADING OR ADDED EARTH MOVING OPERATIONS ANY ANC ALL SEDIMENT AND EROSION SHALL BE MINIMIZED 3 DEVIATION FROM PLANS ND DEVunON FROM THESE PUNS HILL BE AVOWED NITHOLR PRIOR WRITTEN APPROVAL Z 2 DURING CONSTRUCTION OF THE PROJECT SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED of TIE GM.ES ENGINEER ANDAFFEOTED VOVERNMENTPL AGENCIES y C!,I0� VOLUME.THE EXTENDED DETENTION FACILITIES SHALL PROVIDE MANAGEMENT OF THE 1 2&10 YEAR UNTIL THE FACILITIES AFE FULLY OPERATIONAL SHOULD THE CGNTPACTOF ENCOUNTER AN CVEF-BURDEN OF F 3; CR PROTECTED WITH SEDIMENT TRAPPING MEASURES THE APPLICANT IS RESPONSIBLE FOR THE STORM EVENTS CUTFALL WILL REMAIN THE UNDERDFAIN FROM THE FILTRATION BASIN WILL CONTINUALLY BEDROCK DURING GRADING OPERATIONS CONSULT WITH ENGINEER ANC OWNER TC INVESTIGATE DESIGN 4 CLEARING AND GRUBBING TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS SUPPLY HYDRATION SIMILAR TO PRE-DEVELOPED FLOWY RATES LARGERSTORM EVENTS ARE MANAGED BY ALTERNATIVES A AG GROWTH OF TREES OTHER VEGETATION ANC OBJECTIONABLE DEBRIS SHALL BE CLEARED AND GRUBBED FROM �' THE PROPOSED PAVED AND BUILDING AREAS AS WELL AS AREAS.INDICATED TO BE GRADED ON TIE PLANS d V BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE LOCATE SOIL THE INTERACTION AMONGST BOTH FACILITIES AND ADDITIONAL DETENTION WAS PROVIDED TO REDUCE THE B ALL CLEARING AND GRUBBING WITHIN THE UTILITY EASEMENTS AND SPECIAL FILL AREAS SHALL BE TO THE LENGTH tL STOCKPILES WITH PERIMETER SILT FENCE AND UPSTREAM OF TRAPS&BASINS AS SHOWN PRE-DEVELOPED 25 YEAR STORM EVENT AT THE IXISTING I5'CULVERT OUTFAWNG THE SITE UNDER HULL DRAINAGE AND WIDTH NECESSARY TO COFETRNGT THE IMPROVEMENTS SHOWN ON THE PUNS. pig 0 N y?AliG 3 A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE STREET ROAD THE LAND DISTURBANCE WITH THIS PLAN IS LOCATED ON THE DUNLORA PLANTATION SITE CONSISTING OF C ALL TREES BRANCHES VEGETATION AND DEBRIS SHALL BE DISPOSED OF INC LEGAL MANNER ACCEPTABLE TO TIE J i q i PERMANENTLVSTABILIZED PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UMILA I.A (2)NATURAL STORMWATER CONVEYANCE SYSTEM'MEANS THE MAIN CHANNEL OF A NATURAL STREAM GRASSED AREAS AND A MOSTLY WOODED SITE ADJACENT TO AN IXISTING APPROVED DEVELOPMENT BELVEDERE ON?RRANDENOWEER BURNING PERMITS WILL BE OBTAINED BY TIE CONTRACTOR ATLAS EXPENSE GROUND COVER IS ACHIEVED THAT IS UNIFORM MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION AND THE FLOOD-PRONE AREA ADJACENT TO THE MAIN CHANNEL OR THE CHANGES IN RUN-OFF SUBDIVISION FROM WHICH PUBLIC ROADS AND UTILITIES WILL BE EXTENDED MOST CONCENTRATED ANG D. ALL TREES PNDVEGETATION WHICH OBSTRU AT EACH CT SIGHT DISTANCES ADROADINTERSECTION SHILL BE REMOVED 50 0 �� o-'ARE CONTRACTOR SHALL ESTABLISHAVEGETATIVE COVER ON ALL DENUDED AREAS ASSOCIATED WITH THE DEVELOPMENT ARE OUANTIFlED IN THE HYDROLOGIC ANALYSIS AND IMPERVIOUS COVER DRAINAGE FROM THE SITE WILL BE INTERCEPTED BV CURB INLETS ANG CONVEYED WITH AS TO OBTAIN TIERSIGHT SHALL REMOVE EOVEECTION �5 p� � 4 SEDIMENT BASINS AND TRAPS PERIMETER DIKES SEGMENT BARRIERS AND OTHER MEASURES INTENDED 6 TOPSOIL STRIPPING CONTRACTOR SHALL REMOVE TOPSOIL TO ITS ENTIRE DEPTH FROM ALL AREAS TO 1E GRADED w C7 CT TO TRAP SEGMENT SHALL BE CONSTRUCTED AS AFIRST STEP IN ANY LAND-DISTURBING ACTIVITY AND SUMMARIZED IN THE NARRATIVE HYDROLOGIC CHANGES ARE MINIMAL DUE TO IMPLEMENTATION OF STORM SEWER INTO THE NUMEROUS BMP LOCATIONS SMALL PORTIONS OF THE SITE ALONG THE PERIMETER AND OR FILLED HE SHALL STOCK%LE OR REMWEAEPLACRAMEFD THE TOPSOIL AT OWNERS DIRECTION. LLO� 00¢ SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE THE SEDIMENT TRAPS MULTIPLE EXTENDED DETENTION PONDS AND THE STAGED DEDICATION OF OPEN SPACE DETENTION SHALL IXIT AS SHEET-FLOW.WHILE MOST OF THE REAR YARDS AND TOE OF DISTURBANCE AREA WILL BE DIRECTED 7 GRADING PRIOR TO RELEASE INTO THE OVERFLOW CHANNEL PROPOSED ALONG HULL STREET ROAD THE INTO THE ADJACENT SWM FACILITIES OR LEVEL SPREADER OUTFACE LOCATIONS A ROADWAYS EASEMENTS AND SPECIAL FILL AREAS TO BE GRADED AND COMPACTED TO THE FINISHED SIRGRADE OR C6 %w rn DC u &BASINS SHALL BE CONSTRUCTED AS THE FIRST STEP IN CONSTRUCTION UNDER-DRAIN FROM EACH FILTER CONTINUALLY SATURATES THE EXISTING OFFSITE WETLAND GRADES AS SHOWN ON THE PLANS OWNER SHALL HAVE REPRESENTATIVE SUBGRADE COO TEST RUN AND SHALL Q N 5 STABILIZATION MEASURES SHALL BE APPUED TO EARTHEN STRUCTURES SUCH AS DAMS DIKES AND OUTFACE STORMWATER RUN-OFF REPORT TO THE OWNER ENGINEER AND ANY AFFECTED GOVERNMENTAL AGENCIES ANY CONTINUALLY SATURATED DIVERSIONS IMMEDIATELY AFTER INSTALLATION CONTRACTOR SHALL INSPECT EROSION CONTROL 1B (3) RESTORED STORMWATER CONVEYANCE SYSTEM'MEANS A STORMWATER CONVEYANCE SYSTEM THE PROJECT AREA CONSIST OF B077 ACRES MOST OF WHICH IS CURRENTLY COVERED BY MATURE TREES OR POOR SOILS IF TESTED RESULTS WHICH SHOW A CBR OF LESS THAN 10 SHALL BE ADDRESSED AND RESOLVED TO MEASURES WEEKLY 8 AFTER EACH RAINFALL EVENT MEET THE MINIMUM REQUIREMENTS IN SUCH CASE ROAD PAVEMENT DESIGN MAY HAVE TO BE REDESIGNED TO MEET THAT HAS BEEN DESIGNED AND CONSTRUCTED USING NATURAL CHANNEL DESIGN CONCEPTS GRASSED FIELDS MULTIPLE OLD HOMESTEES AND STRUCTURES UTILIZING SCS METHODOLOGY AND NOAA ATLAS WITH THE ACTUAL SOIL CONDITIONS ENCOUNTERED G 6 SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE RESTORED STORMWATER CONVEYANCE SYSTEMS INCLUDE THE MAIN CHANNEL AND THE FLOOD-PRONE 14 RAINFALL DATA THE EXISTING 1 YEAR RUNOFF FROM THIS SITE IS ESTIMATED TO BE 271 cis WHERE THE B IF UNSUTABLE MATERIAL IS ENCOUNTERED WITHIN THE ROADWAY.PARKING AREA OR ANY SPECIAL FILL AREA IT a TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN THE TEMPORARY SEDIMENT BASIN SHALL BE AREA ADJACENT TO THE MAIN CHANNEL (a)THE DEVELOPMENT SHALL BE CONSISTENT IN DUSTING 2 YEAR RUN-OFF FROM THIS SITE IS ABOUT 54.3 Cis.THE PRE-DEVELOPED DISTURBED AREA CONSISTS OF SHALL BE REMOVED FROM THE ENTIRE PROPOSED PAVED AREA OR ELL AREA AND REPLACED WITH SELECT BACKFILL O SIZED FOR RUNOFF FROM THE ENTIRE CONTRIBUTING WATERSHED COMBINATION WITH OTHER STORMWATEF RUNOFF WITH THE DESIGN PARAMETERS Of THE RESTORED THE STEEP SLOPES THE CLEARED&GRASSED AREAS INCLUDING THE OLD HOMESITES AND ACCESS ROAD WHICH E SUITABLE FOR ROADWAY TOR BUILDING SITE)OONTRIDTION AS PER YDOT REQUIREMENTS AND ANY A THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER ACRE OF STORMWATER CONVEYANCE SYSTEM THAT IS FUNCTIONING IN ACCORDANCE WITH THE DESIGN IMPROVEMENTS THE ESTIMATED PRE-DEVELOPED CN VALUE IS 63 BASED ON THESE PAST GRADING AND SPECIAL REQUIREMENTS OF THE COUNTY LINER ENGINEER AMOANY AFFECTED GOVERNMENTAL AGENCIES ONLY CONTROL DRAINAGE AREAS LESS THAN THREE ACRES C FILL AND BAC FILL MATERIAL SHILL BE COMPACTED TO W N STD PROCTOR DENRV AT OPTIMUM MOISTURE DU% DRAINAGE AREA AND THE TRAP SHALLSONG TABLES FOR OBJECTIVES (b)THE PEAK DISCHARGE REQUIREMENTS FORMETSEE CONCENTRATED STORMWATER FLOW TO HOMESTEAD IMPROVEMENTS THE POST-DEVELOPED RUNOFF LOCATIONS ARE BEING MANAGED SO THEY WILL UNLESS SPECIFIED OTHERWISE ON THE PLAN. THERE ARE NUMEROUS SEDIMENT TRAPS PROPOSED REFER TO THE S NATURAL STORMWATER CONVEYANCE SYSTEMS SHALL BE SE I9(B)(1)(b) NOT OFFER ANY SIGNIFICANT CHANGE TO THE EXISTING RUN!-OFF CONDITIONS AT EACH CONCENTRATED OUTFALL a ALL GRADING OPERATIONS SHALL BED SEE IN SLURS MANNER SO AS TO PROVIDE POSRNE DBE AT ALL TIMES CONSTRUCTIONURFAC LOCATION THE GOOD FORESTED'CONDITION FOR THIS SITE INDICATES A CORRESPONDING 1 YEAR E. AT ALL ROAD INTERSECTION IN A CUT SECTION THE MACS SLOPES AND VEGETATION SHALLBE CHIT BACK SODS TO B SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS PRE-DEVELOPED RUNOFF RATE OF 4.85 cis FROM THE SAME DISTURBED AREA AS DESIGNED THERE WILL BE A PROVIDE THE BEST POSSIBLE SIGHT DISTANCE SITE NARRATIVE F STANDARD SPRING BOXES ISB-1)AIL ROADWAY UNDERDRAIN SYSTEM(LACER-DRAINS A.CROSS-DRAINS)WILL BE GREATER THAN OR EQUAL TO THREE ACRES SHALL BE CONTROLLED BYA SEDIMENT BASIN THE SIGNIFICANT REDUCTION OF RUNOFF EXITING THE SITE ESPECIALLY WITH THE PROTECTIONS ALONG THE STEEP INSTALLED AT LOCATION SHOWN ON TIE ROAD PLAN OR WHEREVER000 ER FIELD CONDITIONS WARRANT MINIMUM STORAGEETYOSASEDIMENTSBAT1A SHALL BE 134 MAINTAIN NTANTHE YARDS PER ACRE OF SLOPING AREA AND DEDICATED CONSERVATION OPEN SPACE DUE TO THE ONSITE SOILS THE 1 INCH 24 HOUR G ALL PIPE CULVERTS AND STORM SEWER SYSTEMS WITHIN THE VDOT RIGHT OF WAY SHALL UTILIZE THE PIPE DIAMETER OF THE AAREA THE OUTFALLNSYSTEM SHALL AT A MINIMUM.MAINTAIN THESTRUCTURALCOEFFICIENTS DESCRIPTION RAINFALL RUNOFF EVENT IS NEGLIGIBLE THE ESTIMATED OVERALL POST DEVELOPED CN-71 AND THE AND BE CONSTRUCTED OF THE SPECIFIED MATERIAL,HAVING A NNMUM COVER AS SPECIFIED ON TIE PLANS OF THE BASIN DURING A TWENTY-FIVE YEAR STORM OF 24-HOUR DURATION RUNOFF COEFFICIENTS THIS DEVELOPMENT IS COMPRISED OF AN 8077 AC FARM PARCEL AND IS A PORTION OF IMP 62-16A THE PARCEL ACCOMPANYING TVPICA 11NCH-24 HOUR)SITE RUNOFF TO EACH CONCENTRATED OUTFALL lS REQUIRED TO BE H BACKFlLL FOR ALL MUTES WITHIN PROPOSED STREETS SHALL IS.PULED GENERALLY wACCORDANICE MATH USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TOA BARE EARTH CONDITION OR THOSE IS COMPRISED OF AN IXISTING PLANTATION HOUSE ACCOMPANYING SLAVE QUARTERS AND WOULD INCLUDE THE 80%OFTHE PRE-DEVELOPED CONDITION ALSO NEGLIGIBLE REFER TO THE RUNOFF REDUCTION VOLUMES COUNTY OF ALBEMARLE SEWER AND WATER SPEGFICATIONIACSA)AND SPECIFICALLY IN ACCORDANCE NITHVDOT REMOVAL OF THE EXISTING SUPPORTING INFRASTRUCTURE KNOWN INFRASTRUCTURE CONSISTS OF VARIOUS SPECIFICATIONS FOR HACNc AROUND Lf11unE5 AND THE FOLLOWING CRITERIAAS COORDINATED WITH TIE CONDITIONS EXPECTED TO EXIST WHILE THE SEDIMENT BASIN IS UTILIZED THE SEDIMENT BASIN PROVIDED A WELL AS THE WATERSHED H1'UROLOGV MODELS POND ROUTING SUMMARIES LAND-USE AND TRENCHESHNICAL REPORT SHALL BE LOCATED AND SIZED TO RECEIVE THE LARGEST RUNOFF AREA THE RISER AND BARREL IS OUT-BUILDINGS PRIVATE UTILITIES INCLUDING POWER POLES AND SERVICES WELL AND SEPTIC DRAIN-FIELDS IN STORM EVENT SUMMARY TABLES I SHALL TOA MNMUA OF 41ND11E5 THE BOTTOM OF TIE BARREL OF TIE PIPE ANDA TO BE CONSTRUCTED ONCE AND LATER CONVERTED TO THE PERMANENT OUTFALL STRUCTURE PARTICULAR THE SLAVE QUARTERS SHALL BE REFURBISHED AND MOVED TO A NEW PERMANENT LOCATION. BEDDING SHALL BE BE EXCAVATED AND INSTALLED OFF 4INC ES BELOWL SUITABLE TO MEET SOOT PB-I PIPE INSTALLATION ADDITIONALLY A SMALL FAMILY CEMETERY WILL BE PRESERVED IN ITS ORIGINAL LOCATION THE DEVELOPMENT REQUIREMENTS TRENCHES SHALL NOT BE CUT OVER 16 INCHES WIDER THAN THE OUTSIDE DIAMETER OF THE PIPE 7 CUT AND FILL SLOPES SHALL BE DESIGNEDBEAND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE ADJACENT AREAS PROJECT AND SUBSEQUENT LAND DISTURBANCE AREA FOR IMPROVEMENTS TO THIS 66.27 ACRE LAND UNLESS AN UNSUITABLE FOUNDATION MATERIAL IS ENCOUNTERED EROSION SLOPES THAT ARE FOUND WITHADDITIONAL ERODING EXCESS TABI WITHIN ONE YEAR UNTILOF PERMANENT DISTURBANCE AREA CONTAINS NUMEROUS MATURE TREES MOST ALL OF WHICH WILL REQUIRE REMOVAL AS THERE ARE MULTIPLE ENVIRONMENTALLY SENSITIVE AREAS TO REMAIN ONSITE TO INCLUDE THE ADJACENT 7 BASE AND PAVEMENT ITEMS STABILIZATION SHALL BE PROVIDED SLOPE STABILIZING MEASURES THE PROBLEM RIVANNA RIVER AND TRIBUTARIES THERE TO.WETLANDS AND STEEP SLOPES LOCATED IMMEDIATELY ADJACENT TO IS CORRECTED THIS APPLIES TO THE PROPOSED FILL SLOPES ALONG THE PROPOSED ROADWAYS AND DEPICTED ON THE EXISTING CONDITIONS ANC EROSION CONTROL PLANS THESE PLANS PROPOSE THE DISTURBANCE ALSO EXIST AND SHALL BE PROTECTED TO REMAIN PERIMETER EROSION CONTROL MEASURES A SUBGRPDE MUST BE CHECKED fiV AFFECTED GOVERNMENTAL OFFICIALS AND OWNER FOR GRADE TEMPLATE AND THE CUT/FILL SLOPES LOCATED AT THE PERIPHERY OF THE SITE APPROXIMATELY 270 SINGLE FAMILY AND TOWNHOUSE PARCELS TO BE IMPLEMENTED IN 4 PHASES MUST BE PROPERLY MAINTAINED TO PREVENT UNINTENDED IMPACTS TO ANY OFFSITE AREAS AND PREVENT ANY COMPACTION BEFORE BASE IS APPUED B BASE AND PAVEMENT MATERIALS SHALL MEET ALL YDGT SPECIFICATION AND SHILL BE APPUED IN ACCORDANCE 8 CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN THE DISTURBED AREA CURRENTLY CONTAINS SOME STEEP SLOPES TC BE IMPACTED WITH PUBLIC FACILITIES NEED SEDIMENT LADEN WATER FROM ENTERING THE OFFSITE WATERSHED WITH THE CURRENT MDT SPECIFICATIONS ALL MATERIALS MUST BE TESTED AND APPROVED BY SCOT OR ADEQUATE N TEMPORARYCINAHTFLOW PERMANENT CHANNELAE OR SLOPE DRAIN ION OF RUN SITEF FF FOR DEVELOPMENT OF THE PARCELS IN PARTICULAR ROAD CONSTRUCTION UTILITIES AND REQUIRED APPLICABLE GOVERNMENTAL AGENCY OFFICIALS PRIOR TO EMPLACEMEAND NT WILL BE RTEEP SLOPE AREAS LOW PATTERN DISCOURAGINGSSHALLBE TO RUNOFF CTACROSSHETHE PERMANENT STORM SEWER ARE LOCATED JUST-INTO OR IMMEDIATELY ADJACENT TC STEEP SLOPES.WETLANDS GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL C AUTHOOPERONOFLBEMARLE BE STARTEDORDVDOTBETWEENIALS AND THE OWERRILIWITIOUTWRITTEN FILL OF STEEP SLOPE AREAS DIVERSION DITCHES SHALL G LOCATED TO DIRECT RUNOFF 7C THE WHEN U AUTHORIZATION OF GM AGGREGATE COUNTY OR OFFICALS AND THE OWNER N SEDIMENT TRAPPING DEVICES ADJUST DIVERSIONS ALONG PERIMETER AS SITE GRADES APPROACH FINAL ANC THE RESOURCE PROTECTION BUFFER HEAVY VEGETATION REMOVAL EARTH MOVING AND CLEARING WILL PLANS D WHEN USING PUG FOR AGGREGATE BASE MATERIAL MACH E TESTED BE LE AT THE PLANT THE Z v GRADES BE REQUIRED TO INSTALL THE PERMANENT STORM-WATER MANAGEMENT FACILITIES ANC SEDIMENT TRAPPING TEST WILL BE GOOD FOR 60 DAYS OBEY ADDITIONAL IN PUCE'TEST SHALL BE MADE AFTER W DAYS 0 W w 8 SEEDING AND MULCHING.ETC(TO COORDINATE WITH LANDSCAPE SPECS.) FACILITIES MOST OF THE SLOPES WITHIN THE DISTURBED AREA RANGE BETWEEN 5%AND 24%AND THE HEAD OF T THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE-CONSTRUCTION A ALL FERTILIZING SEEDING WING AND MMULGHND WILL BE DONE AT TIE EROSIDN6 SEDIMENT CONTROL HANDBOOK P.M M WHENEVERE WATER SEEPS FROM A N CRITICAL FACE AREAS KNOWN7E DRAINAGE ORN OTHER GEOTECH IF AN SHALL BE (7, M 2 PROVIDED THERE ARE NO KNOWN ONSITE CONSULT IF AREAS OF WETLANDS LOCATED AT THE SITE OUTFACE LOCATIONS SHALL BE CONTROLLED WITH SUPER SILT FENCE INSTALL CONFERENCE ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY AND ONE WEEK SPECIFIED APPAUCIRAN RATES UNLESS SPECIFIED OTHERWISE IN PLANS SEE TEMPORARY PERMANNTAGO O Q SEEPAGE ARE ENCOUNTERED OUTLET PROTECTION TEMPORARY DIVERSIONS SEDIMENT TRAPPING FACILITIES AND PERIMETER PROTECTIONS PERT UZATMONS SPEC FICATON CHARTS 10 ALL STORM SEWER INLETS THAT ARE MADE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT AS APPROPRIATE THERE ARE ADJACENT WETLANDS TO REMAIN AND ARE TO BE PROTECTED BY SUPER SILT FENCE PRIOR TO THE FINAL INSPECTION o 0 cD 2 ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING B PERMITS ALL PERMITS,NECESSARY TO WORK IN PUBLIC ROADS(ENTRANCE OR OTHERWISE)MUST BE OBTAINED BY TIE SEDIMENT-LADEN WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BONG FILTERED OR BARRICADE TAPE SHALL BE UTILIZED TO DELINEATE AREAS OF NON-DISTURBANCE AND SHALL BE INSTALLED AS CONRRACTOR PRIOR TO CONSTRUCTION ALL OTIER PERMITS NECESSARY TO UNDERTAKE THIS PROJECT MUST BE 0 2' NEEDED TO DEFINE AND PROTECT SEE COE PERMIT FOR SPECIFICS RELATING TO APPROVED WETLAND OR W U S TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL O O OTHERWISE TREATED TO REMOVE SEDIMENT EXISTING AND PROPOSED INLETS SHALL BE PROTECTED OBTAINED BY THE CONTRACTOR PRIOR TO CONSTRUCTION REFER TO COVER SHEET OF THESE CONSTRUCTION PUN O IMPACTS SPECIAL ATTENTION SHALL BE PLACED UPON STABILIZATION OF ALL CUT&FILL SLOPES ALONG THE SITE HANDBOOK AND AND SEDIMENT A REGULATIONS VR SURE EROSION AND SEGMENT CONTROL REGULATIONS 5 w w 3 ALL EROSION SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN ID DRAINAGE STRUCTURES WITH INLET PROTECTION CONSTRUCTED CONSTRUCTED A ALL CURB AND GUTTER AND STORM SEWER TO BE LOCATED IN ANY GOVERNMENTAL RIGHT OF WAY STALL BE W PERIMETER ENSURING THE ALL RUNOFF RUNOFF A POTENTIALLY ACQUIRABLE IS DIRECTED ENTIRETYINTO THE SEDIMENT TRAPPING CLEARING t t BEFORE NEWLY ADEQUATE OUTLET STORM WATER CONVEYANCE CHANNELS OR PIPES ARE MADE COORDINATEDIMTH V.D.O T AND COUNTY ENGINEER PRIOR TO INSTALLATION. O o OPERATIONAL ADEQUATE PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT FACILITIES AT ALL TIMES STORM ANALYSES IS QUANTIFIEDDIFOR THE OF THIS DEVELOPMENT 4 ACOPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL SUSTAINABLE MANAGEMENT OF THIS SITE INCLUDES NUMEROUS SEDIMENT BASINS AND TRAPS SIZED TO B A JOIN!.CUR DROP LITE ION UNLESS SIEHALLALY NOEDWII.THESE ON TIE NLAN SAME GRADE AS TIE APPUCABLE TO PERMANENT OUTFALL PIPES AND OVERFLOW CHANNEL EXITING FROM TRAPS OR BASINS CAPTURE MOST OF THE RUNOFF DURING CUT AND FILL OPERATIONS SEDIMENT TRAPPING FACILITIES THAT ARE ALL TIMES ADJOINING GARB AND ALL BE WOE PIPE ASTA MS lMLE55 SPECIFICALLY NOTED OTIERWISS ON TIE PUN T- TO BECOME PERMANENT SHALL BE DE-MUCKED RE-GRADED STABILIZED AND CONVERTED TO THE PERMANENT 5 PRIOR TO COMMENCING LAND DISTURBING A BORROWE5 IN AREAS OTHER THAN INDICATED ON THESE PLANS D ALL STORM STRUCTURES SHALL BE OTHER PRECAST OOR CAST-IN PU ESS III RCP EXCEPT WHERE NOTED 0 ALL - T 12 WHEN ACHK IN A CO CONTROL SEDIMENTD ISTRANSPORT PERFORMED DR STABILIZE THE SHALL BE TAKEN THE MINIMIZE (INCLUDING BUT NOT LIMITED TO OFF-SITE OR WASTE AREAS)THE CONTRACTOR SHALL SUBMITAT ENCROACHMENT CONTROL AND STABILIZE WORK AREA TO GREATEST BMP FACILITY PER SPECIFICATIONS AND ENSURING THAT THE REQUIRED POND VOLUMES ARE PROVIDED REFER it CONSTRUCTION SOAKING ALL CONSTRUCTION OR AND SURVEYOR YOReE LESS AGREED CONTRACTOR'S EXPENSE UTILIZING I A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN VIRGNP CERTIFIES.STAKING ENGINEER TI LAND SUNG WILL UNLESS UPON BY THE ORDER LI WRITING TO SHIM CONVERSION DETAILS BMP CONVERSIONS SHALL NOT TAKE PLACE UNTIL THE ENTIRE CONTRIBUTING APPROVING AUTHORITY c5 C5 EXTENT POSSIBLE DURING CONSTRUCTION NON-ERODIBLE MATERIAL SHALL BE USED FOR THE COPIES OF ALL SREWORK CUR SHEETS ARE TO BE RANCHED TO ENGINEER FOR HS REVIEW PRIOR TO CONSTRUCTION B CE CI CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS EARTHEN FILL MAY BE USED FOR THESE UPSTREAM WATERSHED IS STABILIZED SAND FILTRATION SYSTEMS SHALL BE KEPT OFFLINE UNTIL USPSTREAM 6 THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURESADVERSE _STRUCTURES IF ARMORED BY NON-ERODIBLE COVER MATERIALS THERE ARE NO WE WATER COURSES STABIZATION OF THE CONTRIBUTING DRAINAGE AREA IS COMPLETEDCONTRACTOR R ORLL coNSTR ET1ON COSTOFEREvIE CONSEQUENCES BE ISURNE OH C S ARE NET PROVIDED TO ENGINEER FOR NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING Hs REVIEW PRIOR To wNTTiINCTbN. of THE REVIEW TO BORNE By wurnAcrGt �FA THE DISTURBED AREA ON THESE PLANS PHASE 1 OF THE SUBDIVISION SHALL UTILIZE A LEVEL 1 FlLTRATION(SPEC 12,AND INCLUDES DOWNSTREAM LEVEL 1 AUTHORITY w$FA 13 WHEN A WE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY 7 ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING SIX-MONTH PERIOD A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF NON-ERODIBLE EXTENDED DETENTION FACILITY INCLUDING RUNOFF REDUCTION TO CAPTURE TREAT AND CONVEY MOST OF THE LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION E ACHIEVED SEQUENCE OF CONSTRUCTI o MATERIAL SHALL BE PROVIDED THERE ARE NO WE WATER COURSES TO BE CROSSED BY CONSTRUCTION MANAGED TURF AND IMPERVIOUS SURFACES PROPOSED WITHIN THIS PHASE IN COMBINATION WITH PRESERVED 8 DURING DEWATERING OPERATIONS WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE PHASE I 8 8 OPEN SPACE DEDICATION THE PROPOSED BMP WILL FACILITATE THE WATER QUALITY AND QUANTITY 9 THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH VEHICLES FOR THE ENTIRETY OF PHASE I WITHIN THIS T 14 ALL APPLICABLE FEDERAL STATE AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING REQUIREMENTS(CHANNEL AND FLOOD PROTECTION AS REQUIREDRUNOFF-PRODUCING RAINFALL EVENT ANL NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE WE WATERCOURSES SHALLBE MET THERE ARE NO WATER COURSES TO BE CROSSED DEVELOPMENT EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY 1 CONTRACTOR SHALL COORDINATE INSPECTIONS AS REQUIRED BY THE VSMP PERMIT PRIOR TO ANY 15 THE BED ANC BANKS OF A WATERCOURSE SHALL BE STATA BILIZED IMMEDIATELY AFTER WORK IN THE IC ALL FILL MATERIAL TC BE TAKEN FROM AN APPROVED DESIGNATED BORROW AREA SITE CLEARING OR GRADING OPERATIONS PHASE 2 OF THE ION SHALL UTILIZE A LEVEL 1 FILTRATION DEVICE(SPEC 12)TO TREAT AND CONVEY THE 11 ALL WASTE MATERIALS SHALL BE TAKEN TC AN APPROVED WASTE AREA.EARTH FILL SHALL BE INERT WATERCOURSE IS COMPLETED THERE ARE NC WE WATER COURSES TG BE IMPACTED ACQUIRABLE MANAGED TURF AND IMPERVIOUS SURFACES PROPOSED WITHIN THIS PHASE THIS MEASURE WILL 2 CONTRACTOR INSTALL CONSTRUCTION ENTRANCE TREE PROTECTION PERIMETER SILT FENCING ?4F,N5Te op FAR t6 UNDERGROUNDDIONTO UTILITY LCLINES SHALL CRITERIA INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN MATERIALS ONLY FREE OF ROOTS STUMPS WOOD RUBBISH ANC OTHER DEBRIS ADDITION TO OTHER APPLICABLE OF ULTIMATELY CONNECT TO ANOTHER PHASE 2 STORM-WATER FILTRATION FACILITY WITH RUNOFF REDUCTION 12 BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING STAGING AREAS ANC SWPPP MEASURES-AS FIRST STEP IN CONSTRUCTION A NO MORE THAN 50C LINEAR FEET OF TRENCH MAYBE OPENED AT ONE TIME ADDITIONALLY THE PHASE^&2 MEASURES WILL FACILITATE THE WATER QUALITY AND QUANTITY REQUIREMENTS ORDINANCE SECTION 5 128 5 B EXCAVATED MATERIAL SHALL RE PLACED ON THE UPHILL SIDE OF TRENCHES (CHANNEL AND FLOOD PROTECTION AS REQUIRED FOR THE ENTIRETY OF PHASE I ANC 2 OF THIS DEVELOPMENT 13 ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OFP- C EFFLUENT FROM DEWATERING DEVICE LNG OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN APPROVED THE LOWER PORTION OF THE CUL-DE-SAC UNMANAGED BY THE BMP WILL REQUIRE CONVERSION OF THEALBE 3 CLEARING ANC GRUBBING SHALL FIRST BE LIMITED TC THAT NECESSARY TO INSTALL PERIMETER SEDIMENT TRAP INTO A MANAGED OUTFALL LOCATION WITH A LEVEL SPREADER APPROPRIATELY SIZED FOR BORROW FLE CONTROL DEVICES THE STRUCTURES OUTLET TRAPSBASINS EARTHEN READ CONSTRUCTION SEDIMENT]RAPPING E M S OF BOTH AND DISCHAFGEC IN A MANNER THAT DOES NCT ADVERSELY 14 BORROW FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL-TYPE POWER EQUIPMENT SHALLBE LIMITED TO INCLUDING EVICES HE TETURESSEDIINTPROTECTION RISER SPREADERSBERM CO AND MODIFIED Christopher C Mulligan AFFECT FLOWING STREAMS OR OFF-SITE PROPERTY RETURNING THE CONCENTRATED RELEASE INTO SHEET-FLOW THE HOURS OF 7OOAM TO 9.00PM OUTLET PROTECTION AT ANY AND ALL CONCENTRATED OUTFALL LOCATIONS U.NoD MATERIAL USED FOR BACK FILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO PHASE 3 OF THE SUBDIVISION SHALL UTILIZE A LEVEL 1 FILTAATION-SPEC 12)FACILITY TO CAPTURE TREAT AND 15. BORROW FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN MAINTAINS LATERAL c„ 031672 MINIMIZE EROSION AND PROMOTE STABILIZATION CONVEY A LARGE PORTION OF THE MANAGED TURF AND IMPERVIOUS SURFACES PROPOSED WITHIN PHASE 3 AND SUPPORT OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS PHYSICAL DAMAGE TO ADJACENT LAND ANDOSIe'L'22 a°r?" 4 INSTALL ADDITIONAL PERIMETER CONTROLS SUCH AS SILT FENCE SUPER SILT FENCE AND DIVERSION e46 a E RESTABIUZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS PHASE 4 THE UPPER AND LOWER FILTRATION MEASURES TOGETHER WILL FACILITATE THE WATER QUALITY ANG IMPROVEMENTS AND DAMAGE TO ANY PUBLIC STREET BECAUSE O SLIDES SINKING OR COLLAPSE DIKES AS NECESSARY TO DIRECT SEDIMENT LATENT RUNOFF TO EACH TRAP AND BASIN F APPUCABLE SAFETY REGULATIONS SHALLBE COMPLIED WITH ADHERE TO THESE APPLICABLE 16 THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL MAINTAIN REMOVE OR CONVERT TO PERMANENT QUANTITY REDUCTION REQUIREMENTS(CHANNEL AND FLOOD PROTECTION AS REQUIRED FOR THE FINAL PHASES STANDARDS FOR PRIVATE AND PUBLIC UTILTY INSTALLATION OF THIS DEVELOPMENT STORMWATER MANAGEMENT FACILITIES WHERE APPUCABLE ALL EROSION CONTROL MEASURES REQUIRED 5 SEGMENT BASIN SHALL BE MADE FUNCTIONAL PRIOR TO ANY ADDITIONAL ONSITE GRADING OR 17 WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS PROVISIONS BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT UNIT BUILDING OR OTHER PORTION OF THE GRUBBING OPERATIONS w SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED IN ADDITION TO PROVIDING RUNOFF TREATMENT DUNLORA FARM WPC PROVIDES A TOTAL OF 14 5 ACRES OF PROPERTY SURFACE WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE THE ROAD 17 TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING SEEDING IS TO BE AT 75 > PRESERVED-UNDISTURBED OPEN SPACE FOR DEDICATION AND RESTRICTION TO LAND DISTURBANCE THE PHASE II SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY SEDIMENT SHALL BE REMOVED PRESERVED AREAS CONSIST OF THE DESIGNATED STEEP SLOPE AREAS AND REMOTE PERIMETER AREAS LBS/ACRE AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MD(OF ANNUAL FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL RYEGRASS AND CEREAL WINTER RYE OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE OR MAY AREA STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER THIS SURROUNDING THE LOTS AND OPEN SPACE WHERE REMAINING UNDISTURBED THROUGH AUGUST TO CONSIST OF GERMANE MILLET STRAW MULCH IS TO BE APPLIED A7 BOLBS/LOOSE 1 CLEAR AND GRUB THE REMAINDER OF THE SITE TO BEGIN THE EARTHWORK OPERATIONSACC PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND-DISTURBING ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR NECESSARY TO ACHIEVE FINAL GRADES ACTIVITIES CONTRACTOR SHALL MAKE PROVISIONS TO KEEP ADJACENT ROADS CLEAN FROM SOIL SOTS. 18 PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER PERMANENT SEEDING AND MULCH 0 < BUILD-UP THE EXISTING NATIVE AND UNDERLYING SOIL TYPE PRESENT WITHIN THE DISTURBED AREA ONSITE CONSIST OF AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBSI1000SF INCORPORATED INTO THE TOP 4-6 2 SOIL STOCKPILER SHALL BE LOCATED IN AREAS THAT WILL NOT INTERFERE WITH CONSTRUCTION Q le ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS LOAM N-SANG LOAM CLAYEY SUBSTRATUM(59ECNU BOURNE-COLFAX CL DE OD RATED INCHES OF SOIL FERTILIVR SHALL BE APPUED AT IOOOLBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT PHASES AND AT LEAST 15 FEET AWAY FROM AREAS OF CONCENTRATED FLOWS OR PAVEMENT THE SIDE Z AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE ND LONGER NEEDED UNLESS LOAM CLASSIFIED AS HYDROLOGIC GROUPS ARE CONSIDERED WELL DRAINED AND INCLUDE MODERATELY HIGH MIX PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95%KENTUCKY 31 OR SLOPES OF THE STOCKPILE WILL BE ROUGHENED BY EQUIPMENT TRACKING AND WILL NOT EXCEED'2 I J OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM AUTHORITY TRAPPED SEDIMENT AND THE DISTURBED TO HIGH ABSORPTION RATES(Ksat) THE PROPOSED SLOPES WITHIN THE AREA OF LAIC DISTURBANCE ARE TALL FESCUE AND 0-5%PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS STRAW MULCH IS TO BE ANC SHALL HAVE SILT FENCE INSTALLED ALONG THE PERIMETER TOE 0 SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY GENERALLY 3 1 BUT ARE 2 5 1 ALONG THE TOE OF SWM E' BOURNE-COLFAX COMPLEX CLASSIFIED AS APPLIED AT BOLBS'100SF ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL CC STABILIZED TO PREVENT FUFTHEP EROSION ANC SEDIMENTATION CONTRACTOR SHALL STABILIZE SITE HYDROLOGIC GROUP C IS CONSIDERED THE GRADED AREAS OUTFALL INTO A MANMADE GRASS DITCH ANO DENUDED AREAS SHALL DRAIN TC AN APPROVED EROSION CONTROL MEASURE AT ALL TIMES DURING S TCRM SEWER SYSTEM BEFORE BEING CONVEYED INTC TWO FILTFATIHE BMFs WITH EXTENDED DETENTION THE INSPECTOR ANC CROWN INSPECTOR APPROVAL PRIOR TC REMOVING EC MEASURES UPON APPROVAL CF THE LEVEL 2 FI�TFp710N FACILITY HA A FOREBAY AREA ISOLATED FFCM THE FILTER WITH A GA61ON WEIF WALL 1.2 MAINTENANCE ALL MEASURES ARE TC BE INSPECTED WEEKLY ANC AFTER EACH RAINFALL ANY DAMAGE CONSTRUCTION Z Z ENVIRONMENTAL INEFEC TOR COVERT BASIN TO PERMANENT FILTRATION EMP4 ALMOST ALL OF THE FPCPCSEC IMFERVI'JS RUNOFF SHALL BE DIRECTED INTO THEF F CR CLOGGING TC-TRJCTL_'RAL MEASURES IS TO BE PEFAIF IMMEDIATELY SILT TRAPS APE TO EE CLEANED J EMc FACILITIES C 4 INSTALL UTILITIES ANC COMPLETE ACCESS BOAC S"APIJZATICN ANC CCNSTFUCTICN U 0 Ic FRCFERTIES ANL WATERWAYS DOWNSTREAM PROM LEVELCFMENT SITES SHALL BE PROTECTED RON WHEN 52%CF THE WE STORAGE VOLUME IS FE.EC WITH SEDIMENT ALL SEEDED AREA AFE TC EE SEDIMENT DEF CS TICK EROSION ANC DAMAGE CUE TO INCREASES IN VOLUME VELOCITY ANC PEAK PLOW RETENTION&TREATMENT THE ULTIMATE DRAINAGE CONNECTINGS 1THFCUGH MANMADE ANC NATL'FAL CONVEYANCE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS SILT FENCE ANC DIVERSION DYKES 1 SYSTEMS INTO UPPER SWIFT CREEK ULTIMATELY C APPOMATTOX RIVER - INSTAL_STORM SEWER INLETS FIFES AMC CULVERTS A PHASED'ENSURING THAT ALL DENUDE. Q Cl_CC 2 Z RATE CF STORM WATER RUNOFF FOR THE STATED FREQUENCY STORM CF 24+•CUR DURATION IN IAHICI-ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED ANC REPAIRED ACCCRDAN'CE WITH THE FC CLEWING STANDARDS ANC CRITERIA ALL CONCENTRATED RL'N-CFO FROM THE WATER CUAUTY IMMEDIATELY AREA DRAIN TO AN APPROVED SEDIMENT TRARPING DEVICE AT ALL TIMES PROPOSED DEVELOPMENT AREA SHALL BE DIRECTED INTO THE STORM SEWER SYSTEM WHICH ACCORDING OUTFALLS 21 ALL TEMPORARY EROSION ANC SEDIMENT CONTROL MEASURES ARE TC BE REMOVED WITHIN 30 DAYS OF W INTO THE FOREBAY SPILLS INTO THE DETENTION AREAS AND IS MANAGED AND CONTROLLED ACCORDING THE SITE IS LOCATED WITHIN HUC SITE INCLUDING FNANNA FINER WATERSHED-PORTION OF NTO HPEAKE BAY FINAL SITE STABILIZATION WHEN MEASURES ARE NC LONGER NEEDED SUBJECT TC APPROVAL BY THE 6 LIME FERTILIZE AND APPLY TEMPORARY OR PERMANENT SEEDING TO ALL DENUDED AREA cc TO THE CURRENT VaRRM RUNOFF REDUCTION REQUIREMENTS FOR NATURAL CHANNELS WATERSHED A PORTION OF THE ADJACENT OFFSITE AREAS DRAINS INTO THE PHASE 1 COUNTY EROSION CONTROL INSPECTOR IMMEDIATELY AFTER ACHIEVING FINAL GRADES 0 > L 19 1 CONCENTRATED STORM WATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED STORM-WATER FACILITY(SWM-A DFNNAGE INTO THE FILTRATION DEVICE HAS BOTH WET AND DRY 0 DIRECTLY INTO AN ADEQUATE NATURAL OR MAN-MADE RECEIVING CHANNEL PIPE OR STORM SEWER PRE-TREATMENT CELLS TO MAXIMIZE THE LONGEVITY OF THE FILTRATION MEASURE PHASE 2OF THE M APTEF THE AREA TO EACH TRAP OR BASIN IS FULLY STABILIZED AND PRIOR TO SYSTEM FOR THOSE SITES WHERE RUNOFF IS DISCHARGES INTO A PIPE OR PIPE SYSTEM DEVELOPMENT CONSISTS OF CONVERSION AND CONNECTION OF MULTIPLE SEDIMENT TRAPPING DEVICES INTO(21 GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS AFTER TH TOPCOAT CONTRIBUTING A TO THE PAVED AREAS OBTAIN APPROYTA FROM THE EROSION =N'F=L Cr) 06 DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE SYSTEM SHALL BE LEVEL 1 FILTRATION FACILITIESISWM 6 8 CI.PHASE 3 OF THE DEVELOPMENT CONSISTS OF CONVERTING AN INSPECTOR CONVERT GECONTRUCT SEDIMENT TRAPS OR CONVERT SEDIMENT BASINS TC TEE Z PERFORMED ALL CONCENTRATED RUN-OFF I5 CONVEYED TO AN EXTENDED DETENTION POND IXISTING SEDIMENT BASIN INTO A LEVEL t FILTRATION FACIUTY(SWM E)PHASE 4 FILTRATION FACILITY(SWM DL 1 ALL GAMS ANL CONSTRUCTED FILL TC BE WITHIN 95%OF MAXIMUM DRY DENSITY ANU 2%GF OPTIMUM PERMANENT TO 1vVE P FACILITY SEE CONVERSION DETAILS AND SPECIFICATIONS FOR EACH,c FOUP RUNOFF REDUCTION IS PROVIDED CONNECTS INTO THE PHASE 3 FACILITY(SWM El TO SHARE A COMMON OUTFALL LOCATION INCLUDING RUNOFF MOISTURE CONTENT ALL FILL MATERIAL TO BE APPROVED RYA GEOTECHNICAL ENGINEER A BASIN CONVERSIONS Z Z REDUCTION THERE ARE A FEW CONCENTRATED DRAINAGE LOCATIONS THAT WERE UNABLE TO BE DIRECTED GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS Z A ADEQUACY OF ALL CHANNELS ANC PIPES SHALLBE VERIFIED USING THE VSMP CHANNEL PROTECTION 2 PIPE ANG RISER JOINTS ARE TO 6E WATERTIGHT WITHIN STORMWATEF MANAGEMENT FACILITIES 0 TOWARDS A PERMANENT BMP FACILITY DUE TO TOPOGRAPHICAL CONSTRAINTS THESE LOCATION HAVE 8 PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPUED TO ALL DENUDED AREAS WITHIN CRITERIA STORMWATER DISCHARGES ARE CLASSIFIED INTO ONE OF THREE TYPES OF CHANNEL APPROPRIATELY SIZED LEVEL SPREADERS LOCATED AT THE CONCENTRATED OUTFALL LOCATIONS SYNONYMOUS 3 FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT SEVEN DAYS AFTER FINAL GRADE IS REACHED ON PNIY PORTION OF THE SITE TEMPORARY SOIL Q B (1)'MANMADE STORMWATER CONVEYANCE SYSTEM'MEANS A PIPE DITCH VEGETATED SWALE OR TO THE IXISTING RUNOFF LOCATIONS THE REMAINDER OF THE MANAGED TURF IMPROVEMENTS NOT DIRECTING STORMWATER MANAGEMENT FACILITIES CONVERSION IS NOT TC TAKE PLACE UNTIL THE SITE IS 0 ITGACONCENTRATED OUTFACE LOCATION BMP OR TO OPEN SPACE SHALL OTHER STORMWATER CONVEYANCE SYSTEM CONSTRUCTED BY MAN EXCEPT FOR RESTORED BE FINAL GRADED SO AS TO PROMOTE STABILIZED AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR STABILIZATION SHALL BE APPLIED WITHIN FOURTEEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT STORMWATER CONVEYANCE SYSTEMS OR FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 30 DAYS PERMANENT STABILIZATION CC 190 1 1 SS)THE MANMADE STORMWATER CONVEYANCE SYSTEM SHALL CONVEY THE SHEET-FLOW PRIOR TO EXITING THE DISTURBED AREAS IN70 NON-STEEP SLOPE LOCATIONS SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR U J GENERAL NOTES POST-DEVELOPMENT PEAK FLOW RATE FROM THE TWO-YEAR EVENT WITHOUT CAUSING THE(51 PROPOSED FILTRATION FACILITIES(SWM A-SWM El WHERE SWM A SHALL INCLUDE DOWNSTREAM THE EROSION OF THE SYSTEM DETENTION OF THE STORMWATER OR DOWNSTREAM t E%ISTING UTILITIES THE LECAIDN of EwsTING SEWER wATER PowER ws TELLPHOrvE Arvc on1ER unuTIES AND 9 PRIOR TO ANY DE-CONTRUCTION OF ESC MEASURES COORDINATE THEIR REMOVAL WITH EXTENDED DETENTION(SPEC 15)DEDICATION OF UNDISTURBED OPEN SPACE AND THE TRANSFER OF OFFSRE APPROPRIATE INSPECTOR PARTICULARLY SEDIMENT TRAP I8 SHALL NOT BE REMOVED UNTIL THE IMPROVEMENTS MAY BE INCORPORATED INTO THE APPROVED LAND-DISTURBING ACTMTY TO STRUCTURES WHICH.APE LOCATED ACROSS UNDERNEATH ALONG.):MEIN-HE LRAM OF I,PROPOSED WORE APE NoT CATE NOV MEET THIS CRITERIA AT THE DISCRETION OF THE STORMWATER PROGRAM ADMINISTRATIVE NUTRIENT CREDITS EQUAL TC 16.33 LBS/AC/VF PROVIDE THE FHCSPHOPOL6 REMOVAL(INCREASEC GFFSRE STORM SEWER ANC ACCOMPANYING OUTFALL ARE RE-DIRECTING TOWARDS SEDIMENT BASIN*2 CREDITING DUE TC HARDSHIP CONDITIONS;ANL RUNOFF REDUCTION FOR THIS LEVELCFMENT THOUGH NOT NECEs;,ux-v SHawI.cn THE PUNS Any WHERE SHOWN ARE cntr APPROXIMATE,CORRECT PRgR TO CONSTRUCTION THE SCALE - AUTHORITY THE ENTIRE DEVELOPMENT AREA CLRFALLS INTO MULTIPLE TRIBUTARIES APPLIED IN THE H'YDFAULIC ANALYST.`INCREASED FLOW-PATH LENGTHS WERE IMFLEMENTEC TC FURTHER ASSIST CDNTRACTER SHALL NCTIM THE UIDEPGPCANC PROTECTION CENTER,LASS LIMY A-'.NIX-SS:.TOE ANC C HE OWN°CET CONNECTING TC THE RIVANNA RIVER THE STORM SEWER CUTFALL LOCATION FROM EACH PRI'THE LOCATIONS ANC ELE5UVENSEF ALL EXEINO LTIUTES VATHIA.THE LIMITS CF CONSTRUCTION HE SHALL NCTIY THE 1C CONVERT SEDIMENT BASIN TC PERMANENT SHIM FACWTIES PER SPECIFICATIONS ENSURING ..CS. 20.�674 IN MINIMIZING THE DEVELOPED PEAK FLOWS THE SWM FACILITIES EACH PROVIDE 2 YEAR ANC 10 YEAR FRE-POST ENGINEER MMEOMTELS IF`HERE APPEARS IC SE A CC1ETRLCTICI CONFLICT OR UPCE CISCC'ERR CF ANN LTIUN NC SHOWN ON ADEQUATE VOLUMES AND SLOPES ARE FUNCTIONAL TC FINAL DESIGN SPECIFICATION INSTALL SANE WPC D02 F06S DETENTION POND IS TO MEET NATURAL GUTFPLL CONDITIONS DETENTION FOP EACH CONCENTRATED DISCHARGE INTC EACH CORRESPONDING OL1TFALL SEE CUTFALL THE FUN THE cCNTSACTCR SHALL BE LIABLE Fat:ALL DAMAGE CONE TC ANY SIPUC%EES cP PROPERTY THROUGH HE :P C,2 ICI.THE PEAK DISCHARGERGE REQUIREMENTS FOR CONCENTRATES STORMWATER FLOW TO c4PELES.Sn'ES£OF NEGLIGENCE An+GFPGE b eSET Hues ETc CESTPCYEC AMu eE FEFLPCEC a-THE CCNIaPCTCPS EXPENSE FILTERS&INSTALL DEWATERING HOLES PER SPECIFICATIONS.REMOVE SILT FENCING INLET NATURAL STORMWATER CONVEYANCE SYSTEMS SHALL BE MET C < I F•(C •RV ANALYSIS PROTECTION ANC OTHER REMAINING EROSION CONTROL MEASURES ENSURE LEVEL SPREADERS ANL �/RV Ges Pre-Gev Des Pre-Crw I F C P FOR SITES-1 ACRE I F C 9 FOR SITES.. 1 LE cenTPACTO START NC TI•THE ACE EECJ E GC VERNMENTAL FL wcRKL PLELk Lnun CHAP-WENT WELT AT LEAST ALL PERMANENT CUTLET PROTECTION ARE STABILIZED AND SL'STAINAELE UP„PROF TC START CF NCRr CN THE FPCJECr SHEET OF E. \\. , II,, `, -- I,:.; \ N\ ., - „ , I. \ \ 1 I.�.I - CLEARInG 4 ��J • ` c, CR GRAPHICAL 1 ( • 1 \•\ 'f,PCSES v f� - r' ',- FFELIMINARY LIMITS OF 4 '� 1 .- ' i `{ `: \\\ DISTLFEANCE • .. ..-c.w _--'� - �� p¢ ' w •nn, KsN f t 1 `I \4 {X - _ -. - - Y WASH RACK :_ _, ' - P / - lI Z F? U 1 I 1 >., 4 _ / - •S - la ;-__7Ant SEDIMENT BASIN#1 - - - o • 1 i. 1 - .k �c�IMEn'TPA'fr 5� _ - _ -_ Z q' r - - `- i r - -®10.3 AC DRAINAGE AREA O 5 p 5 gi p J ! Y I r l (SEE SHEET FOFDETAIL) - '� j 1 , ia, 3 0 Ac DRAINAGE AREA I. 11 ` ®' • - STORAGE REOU 1 3B0 CV w O 'u,G //[ z cc , + , y ,'�.-_ .: / TOTAL STORAGE REQUIRED 402.0 CV\ 1 - - 1 \ _ BOTTOM E.-STORAGE PLEV=362.00 ¢ y~O I i £ TOTAL STORAGE PROVIDED, 405.9 CV• .,,.; '1 / -TOP OF DAM ELEV=375.67 _ y a 5 0_ r y BOTTOM ELEV 39e.oc i 'DA=3 0 Ac y; ( J i� a" ' x 1 ( Fj .,._ - TOP OF DAM ELEV 40455 WASH RACK - 1 A\ % -: SEDIMENT TRAP#2® �` o ®SEDIMENT TRAP#6 1„' -SF _ Vd „svl (SEE SHEET 8 FOR DETAIL) i 1 • (SEE SHEET a FOR DETAIL) _ 3 ( �� '" _-- / 2 1 Ac DRAINAGE AREA + o / ♦V \Jw •19 AC DRAINAGE AREA �� TOTAL STORAGE REQUIRED 281.4 CV '- LIMITS OF CLEARING I TOTAL STORAGE REQUIRED=254 E0 CV r It TOTAL STORAGE PROVIDED=281.4CVft � f OFFSET FOR GRAPHICAL 1 DA=1 9 Ac. PRELIMINARY LIMITS OF TOTAL STORAGE PROVIDED 258.3 CY P/••1 t,// BOTTOM ELEV=372.00 PURPOSES SF _ / DISTURBANCE s \ BOTTOM ELEV=40•9 75 \ TOP OF DAM ELEV 378 55 .. - �1�, A • SF A / Xt • TOP OF DAM ELEV 410 75 �\ , - - . i 1 -_i / s 4, J�___r--'I „/ 75 DC �N.. / 65 _ - //))/ ` '•. ,' - SEDIMENT TRAP SPILLWAY V' '�- a SEGIMENT TRAP SPILLWAY ei,(�� k ( / TS �'/j i)/' - r "- \ WEIR LENGTH t2.6' ) WEIR LENGTH-18' :•{{ PARKING 1j { S STOCKPILE / 1 \ - ,f /l) _ SEE SHEET 8 FOR DETAILS "a'- •� l STAGING AND o.. 1"\ ! r 1 ` V SEE SHEET S FOR DETAILS EI �(, \ Q -p `ram (��� """��. 1 I_ sT / ' ;•• , DA=21 Ac. F Sc3 e 1 / ,.}` ! SEDE SHEET B FOR DETAIL) IMENT TRAP#7 \ ` / /ST _ \!! � �,��i 19AC DRAINAGE AREA �,,✓ RAGE AREA i . 1 1.. ' ' f X�ww...,,,...]33 t ..✓ !.�.##4' ,i •. '� ti -1 �� /(,TOTAL STORAGE REQUIRED 25460 CV \ 1 1 t 1 / !ti<. '51 ' -{ - SEDIMENT TRAP SPILLWAY .4 r0A=19AC "9. - 7�'T TOTAL STORAGE PROVIDED=29970 CV ; ., \\ ' 1 [ ,, �_y/ / ,♦�` `..- ',p{ r y BOTTOM WEIR LENGTHS 6' ♦ XX _".. . '�/ `BOTTOM ELEV=374.00 50 ` / i 1 ` / +L 4 , - •/7���'' ! r SEE DETAIL ON SHEET ♦X , TOP OF DAM ELEV-379 DA=O 77 Ac / / DA=O 65 Ac.. 1 / ♦ f CIMENT TRAP FL 1tiAv SEDIMENT TRAP SPILLWAY �I 1 1 ` f ! i 1 1 2 AC may_i Y t I .� W IF LEn TI- 4 �..-wE1R LENGTH=t,4' i \ i ��1Y •^ ` r EE SHEET 8 FOR DETAILS r ). /� ( DA �si�� �' F+.- t `��i eEE�r,EE e=cRcerAl.1 ` t I 1 `" /'• �r„y,r�.� Y 'PRELIMINARY LIMITS {. r13,7 ! v /'/' / ) t l��(, 1 '® _ • vim.. •.6..r' + OF DISTURBANCE a41/ 1 1 I 1 \ _ _ z v,ut A ♦ a i0 1 /` XI SEDIMENT TFAF SPILLWAY O SEDIMENT TRAP#5 '� V ♦F - -.+�' - .. ,f J FOR STAGING .�, f n w w ' (SEE SHEET 8 FOR DETAIL)® 1L�� - 7-- "`'• ,rST SEDIMENT TFAF#4 tl - - \�'�% - 4.•."®. -'0 A DRAINAGE AREA `' ' /h MOBILIZATION 6 � / '.SEE SHEE i WEIR TT a FOR DETAILS N 12 Ac DRAINAGE AREA .. _ c / tJ N ;` /' �'..� - ,.+ram A' TOTAL STORAGE REQUIRED-2fi8 CV - / E "C.5`»W I,C` f' f' wo O O /iti TOTAL STORAGE REQUIRED-160.8 CY - - + 'Id /� iJ TOTAL STORAGE PROVIDED 1626 CV ' I yy,„':- \ g,.'/H'TOTAL STORAGE PROVIDED-839CY ' / / F', w /' BOTTOM ELF\ 378 00 ' `aE - p - BOTTOM ELEV=400,00 ,/�/ y ST SEDIMENT TRAP#3 /•,) Z z ' r - r 1 1 TOP OF DAM ELEV-408 00 � w (SEE SHEET a FOF DETAIL) A=0 6 x �,,s+V• L" "" "' SEDIMENT TRAP#12 O >> TOP OF pAM E-1 38480 / `' *`/ SEESHEETBFORDETAIL) '`>`• \ \ I ,�1 i+ t 1 0 AC DRANAGE AREA k C,..‘\.. 1:�[" M1 .,-J 0.6 Ac DRAINAGE AREA ¢¢ ,, ..� J /fig {- ,- ,., %....-•v -- , ! ) STORAGE RE09=1340 CV • ` SEDIMENT; TTRAP SPILLWAY TOTAL STORAGE REQUIRED B04 CV a u - , '�rid i _ - / 3 STORAGE PROV9 1444 CV !, WEIR LENGTH=7.7 TOTAL STORAGE PROVIDED=80 4 CY w o Alq 11� (✓✓/j 0 SEDIMENT BASIN#2 SF t ��J�� 1 `�� BOTTOM ELEV=426.00 e SEE SHEET 8 FOR DETAILS • BOTTOM ELEV•-4 t 4.00 �, S 5\ \ .4 SEDIMENT TRA S I_SAT 1 I 1 '/////7/�j fi 6t AC DRPINAGE AREA _ TOP OF DAM ELEV 429 50 DA=1 20 Act WEIR LENGTH 7 \- ,! STORAGE RE09 885 7 CY ' / } 1 } ♦ \ t ,/ 7` 70P OF DAM ELEV•420 33 cc- lie _, - SEE SHEET 8 FOR DETAILS ' -I x l I/ STORAGE PROVD=1.339.4 CV / i T / 1 f•j , {J / - " -^-- r✓� r BOTTOM ELEV 36e.03 DA 5 9 Ac.i 6 t t ( i l ✓7 ,r""'• r TOP OF DAM ELEV=38267 - /‘;/ �•-: `'^+� 1 ! t T/Jf{ m cl Pc r, DA€9Ac X"a } _y�. �i 1 7 S �.•:^"" HATCH DENOTES r d /•-""'•# { • ' 1 • / - ., WETLAND IMPACT AREAS i- I h1 o A /t j 1? wY: / NOTE i 1 - ! ®- i ; ~�`' ACOE PERMIT REQUIRED '•-. K/`/ {•----/ y `T''� ' +J .®SEDIMENT TRAP#13 11 lSEDIMENT TRAP SPILLWAY °X PRIOR TO DISTURBANCE / I S ) - ",•r !"`"`' '''' (SEE SHEET a FOR DETAIL) p ' I ( ----`a WEIR LENGTH=9' „�� ^ j 1 ,� 1 ." ((ff 1 [f /.,'E 1 1 12 Ac DRAINAGE AREA 1 CRITICAL SLOPES TO BE FENCED OFF PRIOR TO STARTING $IT { 7• SEE SHEET 8 FOR DETAILS f , �. .1 . 5, `% 1 g 7 ` TOTAL STORAGE REQUIRED=160 8 CV CONSTRUCTION PROPOSED PRELIMINARY LIMITS OF SEDIMENT TRAP#14® ' .'� 3 `,•, ,J I J DISTURBANCE IS CONCURRENT WITH AND DOES NOT (SEE SHEET 8 FOR DETAIL)) { ♦ ,.per TOTAL STORAGE PROVIDED-•181 6 CY O 1 t 1,-,-/7;74,1:,) ' ENCROACH INTO THE CRITICAL SLOPES 90.90 Ac DRAINAGE AREA 1{ `., ` SF '�;"•-i i 1.. ~ \i - __ _,� ._. ] BOTTOM ELEV 422.00 N TOTAL STORAGE REQUIRED=120.6 CY A 1t \ `DA 1 5 AC r,. 1 - 1 TOP OF GAM ELEV=426 00 TOTAL STORAGE PROVIDED=120 6 CY• 1 ( y., ` /'' 1I 1 2 SILT FENCING SNAIL BE UTIUZEC AT THE PERIMETER OF c BOTTOM ELEV=36C•OC N t N.�j 1 , ALL CLEARING 8 GRUBBING AREAS TREE ROTECTIpN / 1� I �f1iSHALL BE IMPLEMENTED ADJACENT TO SILT FENCE ON 4,'i•l3 0f F/1TOP OF CAM ELEV-370 OC // 1 1 1-!. ) !1rhlk- .., 1 {._ ,,.," - J" ,r � UPHILL SLOPES WHERE APPLICABLE OF AS DIRECTEC 7C �' 'r"• / / / 1 / )I R/ ,) . ;,,,,yam lJ!//y - - ' ,• ff. :. 1 _ ____ s PRESERVE S7AN OF TREES THAT SHALL REMAIN s , SEDIMENT TRAP#8 ST * ,1 45• 7r a ° -/ , 1 f € PRESERVED STEEP SLOPES(=2`%;TC BE MARKED IN THE (SEE SHEET 8 FOR DETAIL) 1, "'" .•a "'>i" _ -- 1 R X F FIELD BY ALBEMARLE COUNTY ESC INSPECTOR PRIOR TO Chrrsloph■r C Mulligan 1.5 Ac DRAINAGE AREA ' m i _ - "]r• ' LAND DISTURBANCE ND 'CTAL STORAGE REQUIRED-201 0 CV + I ®LIMITS OF CLEARING / , _ m' `'t j } ` o` 03187s i` - .fi 05/14/22 - TOTAL STORAGE PROVIDED=214 1 CV I i^ OFFSET FOR GRAPHICAL / L - , DA-9 2 Ac �,.�'' 4 FIELD MARKERS DELINEATING PRESERVED STEEP SLOPES 4s +o. BOTTOM ELEV 374 00 PURPOSES - G - t DA-�3 Ac ? ARE TO BE MAINTAINED THROUGHOUT THE COURSE OF TOR OE DAV ELEV 37e 5c y I " A, t / - _- ', LIMITS OF CLEARING 1 /r / THE PROJECT AND ARE TO BE REPLACED IF DAMAGED -/ / ,} - r /1' )� I "^-•--`- DA=1 5 Ac '• f/ ®SEDIMENT BASIN#4X ,0 OFFSETFOR GRAPHICAL / 5 EOoxa1- / . 1 ,: \_ 17.5ACDRAINAGEAREA ` PURPOSES RESERVED SHEEP SLOPES IS PERMISSIBLE F -I / i STORAGE REQ'D -2,345 CY/ Lii I ®/ „ifV / _._-STORAGE PROVD -4.336 CV f /- - rI'i e ( cn / f BOTTOM ELEV 36800 i ; - I 1 1 a/ f - SEDIMENTTRAP#9 I I I `! • - SEDIMENT TRAPsPIUWAV TOP OF DAMELEV-382.00 1 "�;,, - f/ EROSION CONTROL PLAN LEGEND I I 1 / i . (SEE SHEET 8 FOR DETAIL 1 WEIR LENGTH-9' EMERGENCY SPILLWAY f • / ) • _ -- ! • f 120 CV CL 1 RIP-RAP w, / 1 5 Ac DRAINAGE AREA / ♦ / - / /tf UNDERLYING FILTER FABRIC / `{ CONSTRUCTION ♦ �� SEE SHEETS FOR DETAILS - - ♦ / • / / TOTALSTORA PE REQUIRED=2010 CV ,,,r'� / -114 302 N/ i/ y V / BOTTOM WEIR LENGTH- 4 ENTRANCE CE Z / / TOTAL STORAGE PROVIDED 3325 CV DA=1 4 AC t-" / 2 1 S S TO TOP OF DAM BOTTOM ELEV 360.00 ". _ / r M.111 CONSTRUCTION fo g g O O D M ELEV 354 SC r llI ,+' �// •K♦ '03 ROAD STABILIZATION CPS d \\ Y / p\��I ! � _ P { ✓ r-.-;=-AI, a I SILT FENCE SF - ` ! 7 ,,`\-�f) \ / (�(1�\t � ` 1 / 3Ac DRAINAGE AREA Z CC /1./ 1 W f_�_\� - / u µ / TOTAL STORAGE FROVEEC 'i47CY I-r I I STCFM CRAIN INLET Z / I { { / / f TC`Ac STORAGE FROVICEC "7 CY I '`�' - - _. _ ��r c 4 'r DA=2 0 Ac. , + +BGTTCM ELEV 4G4 o I=Fc7ecncn IP O / , / %S� i- r, �`\ ` / iIl �,' 1 TCF OF GAM ELEV 475 E4 Ii'-�; TEMFCRA.FV GCi .C1_ 1 Q d 0 -/N,`_-j 01 , / l?/ aE 2' �` SF • t 1 1 { ill • .„-.7.- 3 SEDIMENT TRAPHATCH DINSTALL DASHED�JTFALL PIE � - I 1�./" LOCALIZEDWETL4NC /WISH RACK# I ' , / ., , 3 14 SEDIMENT BASIN PERMIT REQUIRED PT UNTIL EC PH STABWZATION 8 ♦, •p / / /fY/ 1 �y.�TO DISTURBANCE INITIATING SWM O'CONVERSION W S IMEn '�< -WAY �� XXIi / /'/ /' g31 TEMPOFARYSEEDING TS ---�- Cn _ SF OMITS OF CLEARING •EE V \ //• OFFSET FOR GRAPHICAL • °,i, / / / 1 /` -�-` \ - - /;� _PURPOSES - _-_ \-'A -_ 7 I / I338I TREE PRESERVATION 7P z / : / AND ROTECTION SEDIMENT TRAM#L® ST SEDIMENT TRAP(FUTURE SB#3 / y/ /r! /r- Q (SEE SHEET 8 FOR DETAIL, , 20 Ac DRAINAGE AREA . / r I3 39 DUST CONTROL O '--f}- (n 1 4 Ac DRAINAGE AREA , _ TOTAL STORAGE REQUIRED 268 CY SEDIMENT TRAP SPILLWAV O TOTAL STORAGE REQUIRED 167 6 CY _. - TOTAL STORAGE PROVIDED- 1 6'1CY WEIR LENGTH 9' PHASE I LIMITS OE CC - TOTAL STORAGE PROVIDED 218 3 CY I BOTTOM ELEV 410.00 SEE SHEET 8 FOR DETAILS I - CLEARING 8 GRUBBING LU TOP OF DAM ELEV 41800 BOTTOM ELEV 354 50 / I 'REFERENCE THE LATEST VERSION OF THE VIRGINIA TOP OF DAM ELEV 354 50 - / / /. // 1 \ _ / EROSION ANL SEDIMENT CONTROL HANDBOOK(VESCH T1ATE NOV 2', FOR DETAILS REGARDING INDIVIDUAL CONTROL MEASURES SCALE. GC' '>• JOB 20 1E74 WPC 202 CCM /'' 7/ ' 100 0 100 200 300 - _• /// - �� �,\ ///v J '/, _ / / SCALE I"�1 6 -_ __ �/ �. - J SHEET OF 9 N N /• - ��` :X/ ! -5 ��\��rv'_�. SOIL LINE u. r• �� / - / am EXISTING ACCESS ROAD fPRN i O w ''C, -.. �I '•��•• ,,,,,,Ass,H RACK F m ..,1•1 ,10::Aiiip,.... 40).: . Cfri .'/ i_ AwNca ! !! �soWASH RACK A\ .. GRUBBING 1 0, O: \ , iiiihowier 22 f _ ) lit f 6 1• r R ' '+'W" � ,,,,, C4i 0 � � _ / �9"";%,ram- 1 �� �n l',� ,../ / C> �Cyr,-'r�ii iv `: h1. 0 \ GI MU �.' `\/ 4 . ,,,Ff.0.1. i `�� j .,� / No INSTALLATION OF STORM,. r/ I '.'i�•`���` � .. • �>]���.', .. / `•• ��• p ` - — // SEWER INLET&OUTFALL IN4O © ,r •• Q J � i •'+ vNo 1 N „ - ' 1 SBs2 MUST BE OPERATIONAL 11 •{` `Q� ��/1 �� ..... I��� PRIOR TO CONVERSION CF 1- +' {� 1�I'��^ ‘; \ tilk, 0 0 % A 1 \ ST*4 INTO THE PERMANENT C`_A/' • `�_.�,/�% Sit s�' I 0 1 4. -I-SWM B'FACILITY I •J -�. .... :.:Ri,1 F . z • _ _ [ v,y "rme ((` \ ✓ '1 L NN. '•Alit -•' 1 i U / �, -gy m ��� ©�-� `�t. A' Firm- a',` . ;\k i o / p4000046. = ' J� / 1 �. .c- / o zz i ti\ \! P.QjUBBING /j/ � �'.� r' �� G PARKING '��sie1. _ _ ///I% . ' N w /' / - �.� azo�-STOCKPILE STAGING AND I . - - Rtl -- �_ ;¢ f / / 0 AREA I STORAGE AREA IIL ' �'t\ ,�:. / • 'OMITS •/ V .-- .�� � -- ,. f i ._CLEARING& NOTE m 0 0¢.rs �� ® / ,..6 ./Si,-, ` �.�y,a� ® ��� � �-.L i _ • �i_` • __. GRUBBING�Y Nit f� - 1 CRITICAL SLOPES TO BE FENCED OFF PRIOR TO STARTING � iv I _ j ,` �_ J I w... ��_� _- CONSTRUCTION PROPOSED PRELIMINARY LIMITS OF F �/ r 1 • • I t-- DISTURBANCE IS CONCURRENT WITH AND DOES NOT c, INSTALLATI N" DDT ®• i 0 lf- 'iV .' a STORM SEWER PILE' )✓j j'" J ENCROACH INTO THE CRITICAL SLOPES $8 11 ETS&OUTFACE IN i ( / .-; STORM SEWERN PIPES 8T i �I/�`-�lilyi�/`` :`��E �4• � - ••i 2 SILT FENCING SHALL BE IfFNZEO AT THE PERIMETER OFO _ti ,Bx2 MUST BE FU=-Y I y -' • STORNI SEWER OUTFALL � °-". t ALL CLEARING&GRUBBING AREAS TREE PROTECTION z OPERATIONAL PRIOR C / �j � .,. uo�t.I SHALL BE IMPLEMENTED ADJACENT TO SILT FENCE ON ' REMOVAL OF nr T \ DASHED BELOW STFB min • ----- UPHILL SLOPES WHERE APPUCABLE OF AS DIRECTED TO --. �� ��I�y _e _ is PRESERVE STANDS OF TREES THAT SHALL REMAIN` I � IIII TC SBN2 PRIOR TO I _ I'� ," }: ., I op 49 �1 r� IlTB _ _ CONSTRUCTION -- "� tix ' - - ` PRESERVED STEEP SLOPES >25%;TO BE MARKED IN THE o`�� '•f / 1 `.-�. I �{ -•� FIELD BY ALBEMARLE COUNTY ESC INSPECTOR PRIOR TO s? ci M \ 4� _. �yW —_ _ _ LAND DISTURBANCE r C i / ' PIPES&INLETSIF _sllrAllr r� •I ' 4 DELINEATING PRESERVED STEER SLOPES Cn t ph r C MuIIigon �' / I I 1 i _ ,-,....A,.........„......--,_ � FUTURE STORM SEWER! �4- ;1 q ,,,.' "f CD _ �'. ' R MARKERS / - ``� `�0r I ARE TO BE CT NTDIARE THROUGHOUTBEREPLACED IF COURSE OF A a,sn _ j 1, _ I --- THE PROJECT AND ARE TO BE REPLACED IF DAMAGED �o �i� i. l ..�000fff1 �r)'�' s4,•e 5112Y22., • �� 1, I�I-'• _ - _ r� I 5 NO PEEMANENT OR TEMPORARY DISTURBANCE OF rax.0 4 / �� ©�® ■ , II,1f�1I'1��I�� 'Y��� � I PRESERVED STEEP SLOPES IS PERMISSIBLE / al /' ' Ai la I'DD I I , _ - -. �II•f'VI!I�"I, FUTUFE STORM PIPE56 NiEErs '.♦w � / .___ •~ EROSION CONTROL PLAN LEGEND // ( ' _ _ A _ am. �` U7IUZE DNERSION TO ` '' r 3.D2 ENTRANCE CONSTRUCTION CE w1T = z - -r _ :. -- '--•-- DIRECT RUNOFF AWAY FROM'' • I (1 1 a / �j� 1 �" I �® _ I Ir.-\� / SEDIMENT TRAP TOWARD /( f 3 CONSTRUCTION ORS `..J �i ,( , I -DOWNSTREAM SBN4 UNTIL 4 f `-' ROAD STABILIZATION z fig ! 4 ... IF CONVERSION TO EBAS / • `'...\\ , ! ',N Y -- - // ' 3.05 SILT FENCE SF d I \A 1 - _ -- -• - .•� `� ` 1 STORM CRAW INLET J %� r .,1.. �� �. �� / i.. ,_-�1 '` 3.D7 PROTECTION IP O �llll -- mI / z wail_ ,• -y� is � C ya LF' C M N'EAyq !SEDIMENT - I ( , IF -�.•.•• ` J / N EN A DIKE • %7 �J J 6 RAF Cr/ d�A O ACRES .......... L � � F,_ I � F.tea:-GeAv l''`I � I � Q � U ' ��41(007,}�� , / P / J��I�— I �i �, t 13.14I SEDIMENT BASIN SB cr > L1J Ley �t SEDIMENT 6ASIN city,O ,T���, - /• '* `. 1 I31B CUTLET PROTECTION OP O O RIP-RAP EMERGENCY ISEE SHEET 14 FnF DETAIL. 1j1 i •- y (/ _ SPILLWAY SEE DETAIL 4'e Ar DRAINAGE AFEF 4 • /if w I I TOTAL STORAGE REQUIRED 552.8 y - /~\ IC 3t l TEMPORARY SEEDING TS I--0 TOTAL STORAGE PROVIDED 748 D CV .�`••, -%� -+ i _ BOTTOM ELEV 410 DD ® • / TREE PRESEFVATbN TP - / TOP OF DAM ELEV 418 57 ULTIMATE LIMNS OF �� -- " •+/' 3�, AND PROTECTION D co Z DISTURBANCE SHAL_ L® / Q (� BE SURROUNDED By 3 DUST CONTROL O CN' / SILT FENCE -JOD - {i , - / I i. �� I &GIRB ING UING C ill / I\ // *REFERENCE THE LATEST VERSION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK T/ESCH0 GATE .:NCV.".' / FOR DETAILS REGARDING INDIVIDUAL CCNTRCL MEASURES SCALEt, 10G' ?111\\\ 0` / c 100 0 100 200 300 WPC 2CCiGrE3 i / / SCALE 1"=100• SHEET CF e tit SEDIMENT TRAPS 1 .., .1*1 I 1-81;;;I:cA�'1��i'I jlzDESCRPIpII ET1 -_ 2.1 103 ETt 3T6__ ET1 _ iT7� E.0 ETY ET10 F M11 ET72 E1.2 ETM _ f`1 �� u I OWEI'VOLUME RED. 201 CY 140.7 CY 67.0 CY 134 CY 80.4 CV 127 3 CY 127 3 CY 100.5 CY 100 5 CY 93.8 I CY{ 87.1 CY 40.2 CY 80 4 CY 80.3 CY . FPDA 3A AC 2.1 SAC- 1,1E AC; 28 AC.i 12 AC f.E AC TA (AC.I 1.0 AC 1,5 1 4 1.1 IAC 1.3 ,AC. Q6. AC 1T AC 0.9 AC. �. - �{ \. DRY VOLUTE RED. 201 CY 140 7 CY 87 0 CV 134 CY 80.1 CY 127.3 CY 127.3 CY 100.5 CY 100.5 CV 93.8 CV 87 1 CY 402 CV 80.4 CV 60 3 CY " I' 'ia �, TOTAL VOLUME RE. 402 CY 281 4 CY 134 CY 268 CY 160.8 CY 254.6 CY_254.6 1 CV 201 CY 201 CY_ 187.6 CV, 1742 -CV 80 4 CY 180 8 CV 120.6 CY • e' k a 41 o Q w?o S� (W) 240 FT 218 FT 150 FT 213 FT 165 FT 2D7 FT 207 {FT 18.4 FT 184 FT 178 FT 171 FT_ 116 FT 165 FT 14.3 FT ►i • - �• �•.• . _---__-� ,._(LI 500 FT 43.6 FT 301 FT 42.5 FT 32.9 FT 41.5 FT 41 5 1 FT 36.8 FT 36.8 FT 35.6 FT 34.3 FT 23.3 FT 329 FT 285.-. FT e P. - , H FE. 1 '�1 a OUTLET LENOTN ____ 18 FT 126 FT 6 FT 12 FT 7.2 FT 114 FT 11 4 FT 9 FT 9 FT 84 FT 0 F)S O S Z,a(DI FT `FT F FT FT 1 FT _FT FT FT FT, FT LO 78 FT 38 FT 7.2 F. 54 FT .m, ., ,.�.,, w w w^� BOTTOM TRAP EL 308.00 372.00 426.00 40000 37100 401.00 37400 374.00 98DA0 850.00 494R0 114.00 12200 470.00 '•u'Z z¢ YYEf VOL EL 401 38 375 50 427.32 402 10 3e2.23 407.81 378.35 37603 381.80 889.09� 495.75 417.82 423 55 -471 OD_ R CI) SEL,O L, p 9 DRY VOla 403.50 377.55 421353 405.00 383.75 410.00 _ 37805 37750 383.25_ 36100 1 IN.E 419.33 _ 424.75 472.00 Stikr, am TOP OF BANK 404 50 378 55 429 50 406.00 384.75 411.00 379.50 378.50 384.50 354.50 I 400 50 420 33 426.00 480.00 Ili FERSPECTNE TIEN PLASTIC PENCE`PI,E_'NE VIE!METAL FENCE w/ TP TREE PROTECTION FENCING DETAIL 0 SAFETY FENCE()ETA' W ^' 3.38-2 301-1 MINIMUM TOP WIDTH (W) DIVERSIONS REQUIRED FOR SEDIMENT ..5 _ --_,n----- TRAP EMBANKMENTS u - �� ACCORDING TO HEIGHT OF R 1111=_ -._. ,. �� SDEE ETAIDN IMI tl II II II-II - f� _ 1 EMBANKMENT (FEET) IIITYP,CAL PARABOLIC / I DIVERSION - - ""' I CROSS SECTION OF OUTLET '• II I 1.5 0.5 2.0 4. V RAP VIEW 20 10 20 -y 81 Iq1 0I- 11111i , -- / a vz,y 2.5 1.5 2.5 �"" ' • �30 20 25 / � • / \i1 35 2.5 3.0 TYPICAL TRAPEZOIDAL DIVERSION - �� ..EcnON-- o O O ^f 4.0 3.0 3.0 - - .2, --. "-- 45 3.5 40 z _ I EXCAVATED AREA 1IIaIIJIL 5.0 4.0 4.5 - I �` ""^'"''"" - _ ¢ LkL ww ow� -I - A \ 41111111 MUDEPM.4" .w.... ...ORIGINAL . \ a GROUND - Illdl,H III R='.III II � pWry„ _ECnONe-e "9 m F1EV - - - OUTLET IERSPECTNE PIM! P,S 2 SOURCE VA DSWC PLATE 3.13-1 TYPICAL VEE-SHAPED DIVERSION TEMPORARY SEDIMENT TRAP SILT FENCE DETAIL(W/WIRE$VPPORT) CONSTRUCTION ENTRANCE CFTAII >to Sours ve. s0 PMte Was-t ST . 3 13-2 SE,- .... 3 -1 30-2 Pc m ---_.- TOE REQUIREMENTS FOR ROCK CHECK DAM SEDIMENT BASIN SCHEMATIC <R R BANK STABILIZATION 2 ACRES OR Less OP DRAINAGE AREA. SrtFFNCF ELEVATIONS o 8 MEW Or 2•43023 ornwl I.Mt DWM m) O FILTER CLOTH UNDERLINER (PREFERRED) _ a....,a.�.I / z " TEMPORARY SWALE `" 10P20231, ReXLL 1 �� _ �-_ .a w. {- •^ 1 �..L% it � 6p1.131 0R.Y r E%IBTAG GROUND ��`, IDORNs'xeAP•vre.) \ ?' /R OR FLATTER Rv t", �^@�cPr�n .tr•/naem �'• / {i SLOPES i MNMU4 �� 1 .. , I C a DEPTH `,,1 IIIII, no. fi e^e^at R 'I _ O MNWMA I =1E AC .S 0 AC •���1 sr '• .. , 1 ,.,. Arm .� ^ Ch islopher C MullhgOn *MOTH C 1 MN 1 I MN ,��`• ..4' tt `.: 1 I I.a Ib D 4 MN S MN rum T.P. , ,,,, DESIGN ELEVATIONS WITH o, 031672 CROSS SECTION z-IS ACRES OF DRAINAGE AREA. EMERGENCY SPILLWAY 05n21-.' +� OUTLET TO SEDIMENT TRAPPING FACILITY SONG COmINATION fg4j 6RA1.6 GRANULAR FILTER FLOW 0.5%SLOPE MINIMUMLOW :: .. �W ) - P1LaM sue.WATER) IeL} SPECIFIC 4P;ICATION 5 MF1F0 OF P-42C1 Iq E APPIJCAD F Al n n�n n e-^FLOW ' AI /a 1=0.13J ...::� " ^ez STRUM/PE IS NOTE ILYPlOCAUSE WCCONVENI.0 OF CURB PL T'S WHERE POVDPGN ON O THE a ^ IDORxsInAM vns) \ u _ -�Azg • •GR,1vLL5Nf.1 LOOT Ya e35T OP PSCw35E twmR �J11 BE W J W. , l �w RMpw ew 0 DRAINAGE LOPEA1AREA=s.e 1MAx1 'LO' _ GRAVEL CURB INLET I-- sLDPE=Iox IMAz. DESIGN ELEVATIONS WITHOUT PLAN VIEW' r. mm••. aw•1�P ®CULVERT INI ET PROTECTION EMERGENCY SPILLWAY PROTFCTION DFTAII E OE IRaM nnn asn.twlD F IP g sOURa P new TOOT AOima-mu du wn 31 E VA.NW MATE a. wee[.TA.ewe MATE 3a 1 J CC CC STONE-LINED WATERWAYS \ Z z o % SILT FENCE OUTLET DETAIL MOP =( a Lu '-SILT -r - -_ ._ - --.._ ..----_.--- I EMERGENCY SPILLWAY h� 1.�\ CC(SPECIAL DESIGN) SET _ I..,, ,- - - ;FENCE " I • O - T EMERGENCY SPIL.WAY CONTROL SECTON- �- ��- - - - - ..+•. CO�\ I'2' "re5 \` j SHOUI.O NOT BE •• _ 0`0EXIST \) FL.7E 1 CLOTH e P . ILLLIATERMLOVER JGROUND EXIST ZELEV ‘ GROUNDw M caMtcs Ds I „y,w �� Z 275 O ,A ' xO11• 'uw ru.+m eav m roam Ctmx ^ �AI1 I• 0 OUTLET CROSS SECTOIN 1 A(37 TbO STAKEANC CEAk. "'• F BRIO OP1213 1101. e� fi�tn, RI=191 I Al}T "'tt^F P-1 4 1 slll �: -- i P -I111 JII lull L„lii• In.-III IIn =IT�,�1=T e" - -�. rjL..i• _PoI=I:I �.......�....w.,,.�....e^.1.. SPECIFIC.APPuunoN PERSPECTIVE VIEW FILTER CLOTH - It e?o?m' _ ..............�.,..A,„.....�..I...I GATE '`NOT2 w..IMee+l Ywwsw-ILO>.sFr �.. .;CE NC'E74 SOURCE VA DSWC PLATE 3.14-5 1 I ' WPC ZCc.7t,5 PARABOLIC R.1IRIMM%ITN PPM.CATER DRAB: _ _ ' .- .011•eHN.»DOOR..V w e.om...m DM 1x1OR e.Am L..1 A A' st 1 n o.. . OGL'TI ET PROTECTION ®CTF RM,FAIN INFT FFGTEC?ICN 3G7 SKEET j`SJ CF _ 3•B S.wv.LIMA-1CS EMI.317-1 Erosion&Sediment Control Technical Bulletin No.4 Erosion&Sediment Control Technical Bulletin No.4 Erosion&Sediment Control Technical Bulletin No.4 Nutrient Management for Development Sites Erosion&Sediment Control Technical Bulletin No.4 'j- Nutrient Management for Development Sites Nutrient Management for Development Sites Nutrient Management for Development Sites I� ESTABLISHMENT OF VEGETATIVE COVER 9.Hydroseeding Fertilizer Bag Amount to Fertilizer to.Apple Hydroseeding is a mechanical method of applying seed.fertilizer.and mulch to land Reads: 1 lb.of nitrogen/1000 sq.ft. C When applying maintenance fertilizer on established sod. zo Developing a fertile soil n a crucial step in the establishment of vegetation.which can reduce the development sues m one step This method is efficient in providing an immediate cover to (5 ''m amount of fertilizer required to maintain good vegetative cover A ferule soil has the capacity to denuded sites.however.the surface must be carefully repared in Order for successful seed - 6-2-0 I6 6 lb Pound.of nitrogen per 1,000 sq.K.0 the fertilizer Ia teas then 50percent WIN N the nutritional needs of the plants beingestablished Good soil qualitycharactenstres germination Hydroseed on rough.loose surfaces only Roughen the surfaceprior to application 10-10-10 1016 Type of Graze et S z supply g rice w include good soil texture.adequate nutrients available for plant growth.good moisture holding of hydroseedmg.per the specification above and in accordance with the 1992 Virginia Erasion& 16-4-8 6 2 lb Month Tall Fescue Kentucky o g N>q capacity.and the appropriate soil acidity'alkalinity balance(pH)The following is a discussion Sediment Control Handbook(Sid&Spec 3 29) Although proper soil pH is crucial in 20-5-5 5 lb Perennial Rye Bluegrass Bennudagrass, Zoysiagraas September_ J z v of the steps needed to ensure good vegetative growth establishing good vegetative cover.lime is usually not included in the hydroseed mix Therefore. 22-3-14 _ _ 4 5 Ili _ __ � --�-- -'- Q -- -0 �� �J`T m lime should he incorporated into the soil as needed when preparing the site for hydmseedmg. October nq 3-7 34 lb F�rly ctoramper � 0 0 0 0 (7 a'-,S o}`"'Z'0 I.Soil Tests Apnl 0 0 0 0 w'i w F z a Soil tests arc extremely important and should be conducted on every site Soil tests provide To avoid poor seed germination as a result of seed damage during hydroseeding.it is 1 a o O 0 specific information on the amounts of phosphorus. d.Use of Slowly Forms of Nitrogen May 0-0 5 0-0 55 1 1 i a l p osp potassium.calcium and magnesium recommended that tithe machinery breaks down from 30 minutes to 2 hours,50%more seed ---- 1 J Fertilizer bags will state the source or category from which the nitrogen is denved Nitrogen June 0 0 7 0 ►� i available for plant uptake and recommends additional obai amounts as required Sod tests are crucial must be added to the tank Beyond 2 hours.a full rate of new seed is usually necessary ---- ¢sO fertihurs have two categories Water Soluble Nitrogen 11 e.all nitrogen is immediately July/August 0 0 0 1 m �' for determining the amount of lime needed to obtain an appropriate soil pH for the vegetation �7r being established.Soil test results include recommendations specific to the site and vegetation UPDATED FERTILIZER SPECIFICATIONS AND RATES FOR ESTABLISHMENT available).and Slowly Available Mature h e.mirogen is available over an extended period of Yearry Lbs N/1000 of 2 5 2 5 2 2 being grown Soil tests recommend the amount of plant nutrients and lime needed to promote lime) The nitrogen source impacts how grass is fertilized and the rate and tuning of application ^ and maintain goad plant growth Soil tests may be performed by the Cooperative Extension Plant nutrients should be applied based upon established requirements of the plant to be grown. of fertilizer Pounds o/nitrogen per 1,000 eq.R.I the fertilizer Is more than 50 percent WIN hC•� Service Soil Testing Laboratory at VPI&St.or by a reputable commercial laboratory Also season of growth.and intended use.as specified in the 1992 Virginia Erosion and Sediment _ Tyke ne Grass a note that County Extension offices have sod testing supplies and information Central Handbook(Sid&Spec 3 31.3 32.3 33 and 3 34)The timing and rate of femhzer Choose a femhzer that has some amount of Slowly Available Nitrogen(SAN) Slowly evadable Month Tall Fescue Kentucky application depends on the type of grass There are basically two types of grasses,warm and cool nitrogen fertilizers make nitrogen available a little at a time the way most grasses need u.which Perennial Rye Bluegrass Bermudagrass Zoyswgrass reduces both the potential of excess nutnents in runoff and the leaching potential of-excess 1.15 1 5 1 5 0 0 Soil tests are not used to determine nitrogen needs Nitrogen is applied based upon established season grasses Warm season grasses(Bermuda.Zoysia)are those that go dormant in the winter _ AnAge _ �_ --._ requirements for theplant to begrown.season ofgrowth.and intended use Cool season grasses(Fescue,Bluegrass)arc those that staygreenyear round nutrients into groundwater Sources of SAN are usually stated on the label It may he stated as October 1 I 1.5 1.5 0 0 PJac gins °i°Water Insoluble Nitrogen(WIN).sulfur-coated urea.natural organic nitrogen or other qy I i 0 0 15 1 5 2.Surface Roughening 1.Recommended Season for Applying Nitrogen Fertilizers controlled release materials used to coat the fertilizer The%WIN is usually stated on the Ma 5 0 I 0 I 0 0 Provide a rough soil surface by stair-step grading,grooving.or tracking the soil to be vegetated The earliest spring application of nitrogen for cool season grasses is six weeks pnor to the last fertilizer con4vner,if the°li WIN is not fisted.assume that all the nitrogen in the fertilizer is June 0 0 1 5 1 15 or by leaving slopes in a roughened condition by not fine-grading,in accordance with the/992 average frost date(for example.February 6 for Virginia Beach and March 1 for Roanoke)The water soluble and immediately available As a general guideline.if the fertilizer has 50°-e WIN Yearly Lbs NI1000 si 3 3 3 3 Covina Erosion&Sediment Control Handbook(Sid&Spec 3 29)Seed germination is difficult latest fall application of nitrogen for cool season grasses is six weeks after the first average frost or less,it should be applied in the same manner as readily available nitrogen If the fertilizer is Covina with compacted soils Rough.loom soil surfaces helps prevent the loss of lime and fertilizer due date(for example.December 29 for Virginia Beach and December I for Roanoke) 50%WIN or greater it should be applied et a SAN to runoff.increases water infiltration,and provides seed coverage,which aids in seed germination The earliest spring application of nitrogen for warm season grasses is the last average frost date 17PDATED FERTILIZER SPECIFICATIONS AND RATES FOR MANAGEMENT for the region(for example.March 20 for\'irginia Beach and Apnl 15 for Roanoke)The latest TABLE 3.37•B 3.Soil Amendments&Soil Quality fall application of nitrogen for warm season grasses is 30 days pnor to the average first frost I.Application of Fertilizer for Maintenance Matenals such as sand.vermiculite,peat.and compost be added to soil to matllfy texture, date for thereon(for example.October 15 for Virginia Beach and September 20 for Roanoke) Apply femhzer when grass is actively growing and can utilize the nutrients Summer is best for (Revised June 2003) pits ma•yF P warm season grasses(zoysiagrass and bermudagrass)while the fall months are best for cool TEMPORARY SEEDING SPECIFICATIONS improve structure and increase the moisture holding capacity It is also recommended to season grasses(tall fescue,Kentucky bluegrass.perennial ryegeass) QUICK REFERENCE FOR ALL REGIONS conserve existing soil quality by preserving and reapplying topsoil in accordance with the/992 2.Per Application Rates Virginia Erasion&Sediment Control Handbook(Sid&Spec 3.301.Areas that have been Phosphorus(I')and potassium(E)fertilizer requirements should be determined by a soil test SEED compacted.or where duff or underlying topsoil is removed.should be amended with compost to Novo-apply more than one(I I hound of water soluble nitrogen per 1.000 sincere feet within a 30 2.Annual.Applkatioa Rates Improve soil quality day tenod.The following table itemizes the fertilization rate revisions to standards and A. When applying low.Water Soluble Ninoaen sources(those that have all the nitrogen APPLICATION DATES SPECIES APPLICATION RATES rn speeifrcations 3.31 Temporary Seeding.3 32 Permanent Seeding.3 33 Sodding.and 3 34 immediately available for plant use).the following rates apply- v Z 4.Lime Bennudagrass&Zoystagrass Establishment Sept 1-Feb 15 50/50 Mix of Annual Ryegrass(blium multi- 50-100(lbs/acre) e) i' w Adjusting the soil pH between 6.25 to 6.5 is extremely important for mass esubluhment. • Never apply more than one III pound of water soluble nitrogen per 1,000 square feet forum)&Cereal(Winner)Rye(Secaie cereale) within a 30 dav_perrod c'oC especially in the acidic soils of Virginia.A soil test Is necessary to determine the wool amount • No more than 3.5 lbs of nitrogen per of lime required to adjust the soil pH of denuded sites However,when a soil test has not been 1,000 square feet annually on cool season grass fi0-t00 Feb.16-Apr 30 Annual Ryegrass 0obum mum-forum) 1lbs/acre) i z performed.apply 2-tons'acre 190 pounds per 1.000 square feet)of pulvenzed agricultural grade • No more than 4.0 lbs of nitrogen per 1.000 square feet annually on warm season z limestone pass May 1-Aug.31 German Millet 50(Ibs/acre) Fri r.3 g o 0 p Revised 7/17/03 Page 2 of 8 Revised 717/03 Page 4 of 8 Erosion&Sediment Control Technical Bulletin No.4 FERTILIZER&LIME o Nutrient Management for Development Sites • Apply 10-10-10 fertilizer at a rate of 450 lbs i acre(or 101bs/1.000 sq fl) w w • Apply Pulverized Agricultural Limestone at a rate of 2 tons/acre(or 90 lbs/1.000 sq ft) NOTE: B When applying slowly-available nitrogen(SAN.WIN.sulfur-coated urea.natural organic 1-A sal test is necessary to determine the actual amount of lime required to adjust the soil pH of site t-m nitrogen or other controlled release matenalsl.total annual nitrogen application rates may 2-lnoarporete the lime and fertilizer into me top 4-6 inches of the soil by disking or by other means 2 be adjusted incrementally by refemng to the following figure The maximum annual 3-wren applying slowly Available Nitrogen use rates evadable in Erosion 8 Sediment Control Technical Bulletin - - - - - n rogen rates when using 50'4 or greater SAN is as hollow's it4,2003 Nutnent Management for Development Sites at http.i/www.dcrstate va.us/sw/e&s.htm#pubs w 0 o Erosion&Sediment Control Technical Bulletin No.4 Erosion&Sediment Control Technical Bulletin No.4 • No more than 5 0 lbs.of nitrogen per 1,000 square feet annually on cool sense.grass $ Nutrient Management for Development Sites Nutrient Management for Development Sites • No more than 5 5 lbs of nitrogen per 1,000 square feet annually on warm season N grass z 5.Fertiliser Summary of Fertilizer Specification Revisions for Establishment of Turf Erosion&Sediment Control Technical Bulletin No.4 TABLE 3.32{ Never apply more than I round of water soluble nitrogen nor 1.000 square feet within a 30 day (Revised June 2W3) ♦`"syIli OF fir oil Nitrogen should be applied based upon established requirements oftheplant to begrown. Nutrient Management for Development Sites �. g ed po yuuemen s 2003 Urban Nutrient Management Technical PERMANENT SEEDING SPECIFICATIONS FOR APPALACHIAN/MOUNTAIN AREA I 'Pe season of growth-and intended use Establishing a uniform dense vegetative cover with a good Standards&Specifications Bulletin -6_ root system reduces the potential for pollution by decreasing erosion and runoff.increasing the Os �• plants ability for nutrient uptake.and reducing pesticide use A detailed discussion on fertilizer 3.31 Temporary Seeding I10-10-10 fertilizer applied al a rate of 450 In I C.When applying mantic-name fertilizer on established sod, use is presided in the'Updated Fertilizer S ficatan and Rates for Establishment"section of LAND USE SPECIES APPLICATION RATES Christopher C Milligan .Pita Peet acre or 10 Its/t.000 ft` tic.No.Ihhs bulletin Po unds a nitrogen rogen p 1,000 agL I the fertiliser tea s as than 50_parcpnt WIN Tell Fescue' t 03167a Type of Gran Minimum Care Lawn Perennial Ryegrass' 0-10% a5xf43 5/1222 y.; Mixed Greases&Legumes 10-20-10 fertilizere Iced al a rate at 500 lbs.Isi.cw° 6.Incorporation acre or 12 lbs/1 Opp f' Month 7al Fescue Kentucky (Commercial or Residermall Kentucky Bluegrass 0-10% Incorporate the lime and fertilizer into the top 4-6 inches of the soil by discing or by other - -- Perennial Rye Bbegrase,Bermtidagrass. Zo imatreze TOTAL 200-250 lbs. means.Incorporation reduces the potential numeni less due to - APO,ply the equivalent of Pota00 sh i phosphate bar 1 1 0 0 Minimum of three(3)up to five(5)vanish.. rp pi muff as well as significantly not 3.32 Permanent Seeding ; Legume stands only NO NITROGEN and EN(N of Potash(Kt0)per acre September ---I of Kentucky Bluegrass from approved list TOTAL 125 lbs. October 1 1 0 0 Hid.Mamteriarrce Lawn uegr increasing the success of establishing a vegetative corer When surface roughening does not NO NITROGEN(N) 1 for use in Vrryfinie' occur prior to the application of lime and feniltzer'mix'the lime and fertilizer mto the soil.al Early November 0 0 0 0 Tall Fescue t 28 lbs. least 4 inches.by the methods described in the 1992 Virginia Erosion and.Sediment Control Grass stands only 10.20-10 fenduer applied eta rate of 500 Da I API 0 0 0 0 0-0.5 0-0 05 t 1 Red Top Grass a Creeping Red Fescue 21bs Handbook(SW&Sp.:3.29) acre or 12 lbs./1,000 fY gAuunn'______ I __ General Stove 13.1 a less) 20 lbs. 10.10.10 femf er applied al a rate d 450 its/ --- -' ----une 0 _0 , 1 0 _ Seasonal Nurse Crop' TOTAL.150 lbs CD When incomoration does not occur.and fertilizer and lime is applied directly to a smooth acre or 10 Ibs 11.000 fr NOTE For cod JulytAugust 0 0 0 1 108 lbs surface the phosphorus(P.O.)application rate must be reduced by half because of the limited 3,33 SoddingorYea Lbs N/1000 ef, 25 2 5 2 2 Tall Fescue' season grasses apply fertilizer in tall et spring M Red Top Grass or Creeping Red Fescue 2 lbs. contact area with soil and the risk of nutrients being lost m runoff For warm season grasses apply the fertilizer in Low-Maintenance Wove Seasonal Nurse Crop' 20 lbs. r1) late spring or summer only Pounds of nitrogen per 1,000 p.1L lithe fertilizer is more than 50 percent WIN (Sleeper than 3,1) 20 lbs H T of Grass Crownvetch' 7.Seeding __ Type TOTAL 150 lbs 0 nacre or lbs/1r000lred atarate additional lbs i Selectmen of Plano is based on climate topography soils land use and the planting season The )acre or 12 The;1.000 fY Apply additional Month Tail Fescue Kentucky 1-When selecting varieties of Wrtgress use the Virginia Crop Improvement Association(VOA)remmmentletl Z /992 Virginia Erosion and Sediment Control Handbook yegela0ve foyer standards and 3 34 Btmiudagruc gm s horns and potassium 30b0 days later Perennial R Bluegrass Bermuda rags rue turtgress van.list Quality seed will bear a label indicating that they are approved by VCIA.A current lurfgrass z Z .&Zoysa ss Establishment Phosphorus pp Ys ye ueg 9 IoYs'a0 spec frcations 1 31 Temporary Seeding,3 32 Permanent Seeding.3 33 Sawing.and 3 34 based on the soil test Apply an additional �ii tn115 1 5 1 5 0 0 variety list a available at me local County Extension office a through VCIA at 804-746-4804 or al \\ 0 Bermudageass&Zoystagmss,describe in detail the specifications for plant selection In bonze vision of 1 Iblt,o00 ft=ol nitrogen when October 1 1 5 1,5 ... 0 0 htip/tide.cses.yl.edit/html/Turfnud/publicatwnsroublications2himl / 'the P&K are applied -- -_-- - addition.attached are one-page updates to the segetatne corer standards and specifications. April 0 0 1 5 1 5 2-Perennial Ryegrass will germinate faster and at lower soil temperatures than Tall Fescues thereby provdmg a which provide updated lenilizer and lime rates and the seeding schedules for the deferent May 15 0 0 0 0 cover and erosion resistance for seedbed Q 3.Using Fertilizer Analysis to Calculate Nitrogen Rates June 0 0 1 5 1 5 3-Use seasonal nurse crop in accordance with seeding dales as stated below physographic regions of Vaginta I- All fertilizer packages hays three numbers present on the package(for example.10-10-HI or 16- rearry Lbs.NI7000 al 3 3 3 3 March.April-May i 5" Annual Rye CC 2 �j S.Mvkhing 4-8) These three numbers indicate the percentage of nitrogen(N I phosphorus(PtOs)and May 16°-August 15" Fogail Millet L1_ >CID 0 The application of mulch to the soil surface for both temporary and permanent seeding.is one of potash(Kt0)present by weight which is called the N-P-K rano Far example a 2(1 pound bag of August 16'-September October Annual Rye the most effective means of controlling runoff and erosion on disturbed land All permanent1 tifi-4 is 111 percent nnnrgen(2 lb.of NI 6 percent phosphate(I 2 lb of P,O.).and 4 percent FLOW_CHANNEL STABILIZATION November-February Winter Rye Z seeding must be mulched immediately upon completion of seed apphcauon.It is especially potash((1 K lb of Kt0I the remaining is inert material to facilitate even application of fertilizer GRADE a nu situ Io•<x0,x. 4-All legume seed must be property inoculated n Flatpea is used.increase to 30 Ibsiacre If Weeping p to mulch liberally in mid-summer and nor to winter Mulching eyenis erasiom.and Lenegress a used Induce in any slope or low maintenance mixture during warmer seeding gonads muease tc W important Pg PrThe W'irpnia nutrient management recommendation is to apply no more than 1 lb of nitrogen per Seer and cover meth straw mulch 30 40)bs/acre Zcip thereby polluton.by protecting the soil surface and fostering the growth of vegetation by 2 Seed and cover with Ewsicn Crnvol Matting er tins von sod increasing the mooture content and providing insulation from extreme temperatures The/99_ LOM)O square feet within a 30 day A fertilization rate of 1 lb of nitrogen per I 0 square - 4-?•stone or recycled concrete equivalent Pressed in minimum to soil in a -layer Virginia Erosion and Sediment Contra/Handbook(Sid&Spec 335)details the mulch feet can be obtained for any site byy using WO the fertiliser analyses on the bag and knowing the arcs FERTILIZER&LIME spectfOcasons and includes a list of the typtcal materials used to mulch(for example strawwood . of applicator Construction Specifications ft) Q chips.and fiber mulch) • Apply 10-20-10 fertilizer at a rate of 500 lbs-acre for 12 lbs I 1 000 sq t All temporary ssvales shall have uninterrupted positive grade tc an outlet Spot • Apply Pulverized Agricultural Limestones at a rate o(2 tons/acre(a 90 lbs r 1.000 sq ft) elevations may be necessary Icr grades less than 1% NOTE. 2 Runoff diverted horn a disturbed area snail be conveyed to a sediment trapping device -A sod test is necessary to determine the actual amount of lime required to adjust the soil pH of site 3 Runoff drvertetl from an undisturbed area shall outlet dliecty mite an undisturbed -Incorporate the lime and fertilizer Into the top 4-6 Inches of the soil by disking or by other means stabled area at a non-erosive velocity -When applying Slowly Available Nitrogen use rates available in Erosion&Sediment Control Technical Bulletin 4 All trees brush stumps obstructions and other oblectionade material shall be #4 2003 Nutrient Management for Development Sites at http.//www.du.state.vous/sw/e65.htrifffeubS Revised 7'17/03 Page 3 of K Revised 7.17'03 Page 5 of K removed and disposed of so as not to mlertere with the proper/uncbonmg of the swale DATE t-.NOV 21 5 The smile shag be excavated or shaped to line grade and cross section as required to SUALE. meet to coterie epecrhed hereir and be tree of bank projections or ease,irregularities JOB 20.1674 which wig impede normal flow WPO 252157063 6 Fig t necessary shall be compacted by earn moving equipment 7 All earth removed and not needed for construction shall be placed so that it will not interfere with the functioning of the swat. _i-SET CF 9 8 Inspection and maintenance must be provideo periodically ano aver each lair event Section 5. Stormwater Management Plan (Prov ide a reduced I 1 x 17 copy oldie latest stormk‘ater management plan. Do not reference only.) This site is located within HUC 02080205, Rivanna River watershed-portion of Chesapeake Bay watershed. A portion of the site, including adjacent offsite areas,drains into the phase 1,storm-water facility(SWM-A). Drainage into the filtration device has both wet and dry Pre-treatment cells to maximize the longevity of the filtration measure. Phase 2 of the development consists of conversion and connection of multiple sediment trapping devices into(2) level 1 filtration facilities (SWM B&C). Phase 3 of the development consists of converting an existing sediment basin into a level 1 filtration facility (SWM E): phase 4 filtration facility(SWM D)connects into the phase 3 facility(SWM E)to share a common outfall location, including runoff reduction. There are a few concentrated drainage locations that were unable to be directed towards a permanent BMP facility due to topographical constraints;these locations have appropriately sized level spreaders located at the concentrated outfall locations, synonymous to the existing runoff locations.The remainder of the managed turf improvements not directing into a concentrated outfall location, BMP or to open space shall be final graded so as to promote sheet-flow prior to exiting the disturbed areas into non-steep slope locations. The(5)proposed filtration facilities(SWM A-SWM E),where SWM a shall include downstream extended detention(spec. 15),dedication of undisturbed open space and the transfer of offsite nutrient credits equal to 16.33 lbs./ac/yr. provide the phosphorous removal(increased offsite crediting due to hardship conditions)and runoff reduction,for this development. Though not applied in the hydraulic analysis, increased flow-path lengths were implemented to further assist in minimizing the developed peak flows. The SWM facilities each provide 2 year and 10-year pre-post detention for each concentrated discharge into each corresponding outfall. See outfall analysis on plan sheets. Issued— 10/2014 Stormwater Pollution Prevention Plan(SWPPP)Albemarle County 1 011111lpin l , IIIIIINOI I InI1 I111INI I IIII IlIIIIIIIIIII IIpplllplllll II, IIIOIIlnmploriIIIIIIHIIIIIIIOIN 1 II I IIgIIIIIII II IIIIII IIII IIII IIIIIII I III, I IIII IIII IIII IIu IIIIIIII I, III 0 IIIIII I 0oE IIIIIIIIIIIIIII1111III II, 111/11111I11 nunnluu IIII IIIIIIIII IIIIIIIINIIIIi 111111 11 II INIIIppI I J (IIIIIIII ilI O zI VSMP & SWM PLAN ¢ -i W s �= WPO#2021 00063 ,,,, I TM P 62-16A RIO MAGISTERIAL DISTRICT, COUNTY OF ALBEMARLE, VA SITE DATA O III NNEY E-SRN-N=';.ILJ'S i� i W 'HI• _ICS_KING TAUS` - • E"A5_C UAFO_INE MOJNA RAV • 5 i 24 MENCHACA:JAJ JNI'33 / i- v AJSTIN TX 73745 - • e 1 DaELOR=R SOUTHERN DEVELOPMENT GROUP INC .0 i 42 SOUT4 PANTOPS DRIVE - „r \ 4AR OTTESVIL_E VA 222,' osC / PLAN PREPARER RO LCABL•SH GALL 3 ASSOCIATES 20�2 I 1' / 999 SECOND STREET P i \ Sheet List Table -HARLOTTESVIL c VA 22902 434,977.2235T 'Sheet Number Sheentle ® 3ELVECESE '; •,V. 5�EPT TAX MA A Nte 16AC ',II' �,v a / / F, 2 CT NOTES 6 OVERALLAN TCTA -A _AREA 30 77 AC RTION OP TMP_2-+SA.. >,„,,�. 3 _, vj'EH= _.I..S EXISTI\u^CO\DITI N LAN ZONING R4R=SI-=NTIAL �0V' S c"HA3E= 4 CONSTRUCTION ACC SS s,.EM:.LITION:.AN OJRR_NT-SE 2 EXISTING SINGLE-AMILY DETACHED S=J.HCME3 �� EROSION i SEDIM=NT CONTROL UARRA'N= Z z F4 STANDARD OENSIT'� 4 DUIEC ��� 16 EROSION i SEDIMENT CONTROL FLAN PI-ASESITE 7EROSIONSEDIMENTCONTROLPLAN-PHASEI UALLOWABLE UNITS 4 DU+AC-323 C U j LOCATION 6EFOSION SEDIMENT CONTROL DETAILS o PROPOSED JSE PHASE 1 fi9?641 S F 16 02 ACRES TOTAL `' ' 9 SEEDING NOTES 8 DETAILS 57'773 S F 13 13 ACRES LOT AREA 77 R-4 LOTS 20 ATTACHED UNITS] r - -- J O - - 125 868 S F 2.AR ACRES ROW AREA - 'L PRE-DEVELOPMENT DRAINAGE MAF _ PHASE 2 - - �w� \ POST-DEVELOPMENT DRAINAGE MAP 848•22 S F 19 47 ACRES TOTAL - T Pv / 12 STORMWATER OUTPAL,_COMPJANCE _ 706 791 S F -'6 23 ACRES LOT AREA _ _ .41 33'5 F 3.24 ACRES ROW AREA /— '3 SS+g SWM'080OND CONVERSION s PHASE 3 -- - S328 SWM PGND CONVERSION 5357C.SP '345 ACRES TCTA_ / / '' ?' S SR3 tlSWM POND COWRSION 52+3E7 c P t+5'ACRES�.T AREA ._ .. H`2 PC / 16 S34&SWM POND CONVERSION _ 84 334 S P 1 94 ACRES ROW AREA �<T _ PHASE 4 • / �7 STORMWATER MANAGEMENT DETAILS - 295544SP 605 ACRES TOTA.. - /' _ ,N Q I 216+3,S P 4 9E ACRES DT AREA �,,� f_. - - -- 1E LAVG JSE ANALYSIS - 73 443 5 r +.69 ACRES ROW AREA - - / t9 BASIN s STORMWATER DETAILS REDUIRED OREN.BRACE 45 2 Acres P ASEING'PER PHASE I - 4 32 Aaes PI-LASE+ _- TOTAL SHEETS=19 1 467 Acres-°HASP2 - "� 336Acres PHASES I / 6E Ac---P-ASc4 �\ J -� .,RESTrCPEN SA ACE DEDICATE: 14 5 ACRES / yyS 'P • .-! <Oc`"w Z C G SIT_NUTRIENT OREDITS +633 55,AC TR NUTRIENT CREDITS.ROM ' �a \ D ChnatopMr C Nun,% gan u°w° O-SITE NUTRIENT BANK ISLAND-0L.SU3DINSIDN = afta7Z -17•I�5lACNR ORIGINAL s 35.1222 c til 16 85 LBS CREDITS REMAINING o' FOREST OPEN SPACE EASEMENT N CIRCUIT COURT OF PLUVANNA VA INSTN 210a'96, VICINITY MAP - C SCALE:1"=1000 FEET I W CD i N g LII I— ...... z w =i = c.• Q a- C 'I a- CCCC 2 W f.s1 0 > O , U 'I o J Zz Z D Li E APPROVALS 0 2 DEPARTMENT SIGNATURE DATE I o DEPARTMENT OF COWL TV DEVELOPMENT' • _ ; ENGINEERING I CAVE :NC- -----— -- 1 --A`= -- fl olI - 1 _ cl l- -- # / t i i / �/ TMP 62-16D ♦ TM,- /_243-1 / U / / N/F1BELVEDERE LAND HOLDINGS LLC Preoe,om.?s. ^<cIN-,E I.-DERE INC V - \-: }� III,' i� t.} ZONING R4 ���� �I ZO1% __ NM2 ti y • / / ,, / ♦ r '41. / s �� 1 -C I ! 1 d !/ 1 I i • ,i // \ --"� \ \- �'�� s _ L /�� -- / -: tea. TMP 62F1 D ^/ ; aA_ /1 / // Z i f I _z o / ' ' ...... i Pre Devo a ,-1..,:-.--- -- /,'..'- I DUNLORA COMMUNITY / 11b4ecree \_ _ Ari Nr `- 1 C7 ° G ' / 7 ASSOCIATION INC 1 CN_s> v - _ j E �I I '►4" z rT I ZONING. : - _ /< 1 I R4 rc 1Ds me f 1 NING. / v1 m � • / A'\ 1 - / - _ ♦ 1C t1JmM "_ I 1 1 s / . �' Pre DevebprneM D9 / ♦ -- 1.-----,___ / a 1,18 acres —" / ♦ 4 __ _ I B / �,ti. ! Tc=10.5 net \ I - ---I 1 f 0 / _ /, / �.... \I Pre Development F2 J, / �� ,:yam I 2.O aces I i 1 ;/ / 1 CN=61 1 r - A (/ "_ "i��� /w rc=l3.e min / t \\ \\ �/. 1 I 1 / i �\ �\` Pre Development DI I / ,/"---- '.. —"\ / \ 424 acres \ / / / / \ `, t_-— — ' \ ., Tc=10.5 min / \ I / ' , \ \ / TMP 62F1-BI / 1 �.�♦ -- 1 •st_�� / i DUNLORA COMMUNITY ✓ i ��` ��__' - -- 2-16A N - //'z '�' ASSOCIATION INC. . / 1 ♦♦♦ I1 • .......... /N/F PHIL Tc=laernn �.. �__,/,' , `v v ZONING R4 L�IpS, E L & ANN P 7.��/ � / ` ` : ` '--/ ZONING R4 /-- 1 1 } i \ j 1 //Pre DereloprneM C2 / _;'\P ♦% I' ' .< l \ � / �' / 1 3.68 acres 1 / \ • •• 2 rr h \ 1 / / CN=61 I / - O 11 ,_/ j'/ , / Tc=112min / I s� i—min-- \ w • 1 / I S,. \ ! / Tc=12.4 - ♦ ,, j,i Z. \ // J' �i rPm Development "'' —� �� (� I /yam //- 1.029aea / a a \ 1 _� o . \ lc 2.4 min /' •' CN= ' 0 Ti oi L 1� Pm Dseamen:C1 i �\ //' y HIM 6.63 epee 1 \ / CN 6 i 1 v 1 Tc=112min 1 m-> I \ -------- / t 11.98 e� 'Pre- Development lZ.----- / / 1 i a A \\rye=amtn -- CN 6°8 "� —__ I 1 ( z t rh 1 I I I t / Tc=13 rMn / / -- —- I 1 1 .€ .+..' I 'J / /I ' / i 1\ I ��svT6 of 1'I /1/ ———————�'�Pre DavebprneM B7 �''II o e1 e v sheet. // 1'42 eGe6 /// CN=61 /�De elopment B /F MORGOGL IONS THERESA E OR CN=61 // rc=e " // esT acres ae 1 \ ! JOHN G SCHUT E .a Tc=5min / / CN=61 / <` ' „1.j /' / / rc=ls.4 min / // / I ZONING R4 / // '— / i i I / ' / /-/ / // // I w (Z / ��i / W // I I �// I 7. /Pre Development 82 / / / / 4.N=acres1 / (} / / // CN=61 / Z \ ; J Q I / - - 0 / MP 62F1-A // ..., \�� Q CL Z • CLUB DUNLORA LLC ��` r- //_ ��� �-- CC W I ',ZONING R4 I1 \.�-- _�/-/ ��� / /�^J•• i� /' % He.Oinlopment lK -- Pre Development B3 /•• > 3.08 acres / ` \\ -..\ ♦ / lYQ'�p;5087=`=�.l .� 1 - / ❑ } ♦* rryn r DN=el Tc=B.B min / / Lb CC ``I , / 7 , , 4.. . t �--- ----- '��.. / 1 , 100 0 100 200 300 - / 1, , TMP 62-16C X oc/ / / . ' - SCAI.El t].^.1]�116: ii / �� N/F MORGOGLIONE, THERESA E iV , \ OR JOHN D SCHUTTE ZONING R4 / seer 10 CF U// ,.... v :,,LINE P f I k et'fp 1\ d� 1 SE6.•TAILS� ,�, - � / -/ ISTING ACGES RCAU(PRN; N? C - AtoLL1 `�"+Mi � ",/-. t .l ,3 L ANFASt OF HL VHOVI StL L(J SSHAL�by Merle Al ( 1 • F• .R . . I ^.`.1 ii �� / -�- h�Wt✓ I A. r.n F.etierfn at THC Hnn .- QJQm '` , CN scree_ ; . \\ T 2 Acres '`'11rIi 4� � N'FF9('A,.�', I �,o '1 '�p CD Ns 8SA- -Ilhoier Tc=5min i � ma 7 ' �`\� '� /� I w a NOO¢ Ef� � ,� S.—� I Forest/ Open Space iw d: cl a (. L/.'- f„L. .. sn.a DA=i45Acres • oA- o.Qe. f. ® �� �,�'°'�IeTsf Y,oJ � ��.�. ._._ -7 _ J cN-ei All Non-Lot Areas O t 1 7c 16 min \ su ' ,S .e within 80.7�7 acre IX . . Ilk • BheelbwA2 4 • �' / Development o be w e/,,..-- � Devel ent t _ ` ,=1.6 81 `5��,���, .a i 'r n r L managed b HOA T 7a 5mm • $ 6 . n l g Y //,-‘4\---- -IL' \. 4. —,1 ` " ' < % ''\ --14.- sogo .‘,..„,.%.,..\ ,,,Nik. .., .7.04,...«,6L4000,_ *Iirestis,, tr_.....___ ....-.,',,.._ ,2 -- _, ....„. ��` I w-az7 aa.. ��7 1, ....a."... Post 0ev B2 �f� i. Tc=5 min C / 0.50 acre. A.,'_____ _ `. Gtltl. - .. z w CN-� �� y "EE SHEET,4 ,3 ec I 1 � ..��� -FOR„WMC CN=�B 1'-5 I r nvFRCIc N T'=s ( \ �� II i�/ IC , t9 - Poet DeV.'E3 .i - r v z z ��1'll ��.r Ka, h I I �, i?�� �F cN=e1 acres '• '9• ,f �. C. 4 � • . Tc=5 min Q a d �IlwKw �, � ) s s O � .I//��� �' ' �� , y 7l.os Post o52ec�es ¢.¢ ----- (� DA -1Y / Cu-76 / / 1lit,2ingit. 1\ r �'ir \ \ 1 �/ �/� �'� y ��'�. . \ I �) - Tc 5min ... / VI '11l! + I \ \) \\, 1 I -. 8EMISIN jS�E , ' _ z I N .mine �a Kr-, �-i ( 1 / , II , �. 1 1 11i 1 11_ •1 ' i \ __ - _ :„..,:11 OP A__ __, ' s-`--- c' rili__', , _ __ __ _ _ _ _ , , __ _..- -\ - - Christopherc Mulligan 0.92 ease / CN=81 - FUTURE STORM EWER•s,i' - 1 �i�,.,5f1222 I Tc 5 min.-. i, FIFES 81NLET5 \ I Pact Devebprrmm C2 I a -- ----•_. De-4.1 1 - _. Pool mem Cl .----- / II CN-80 FUTURE STORM SEI. B M. Tc=12 min PIPES 8INLL --' CN=80 � 1 #•..i - ������ t Tc=12 min --_.—_.___ 1 f F.�;:. _xr a AV 4' :42 '` -i -' ' •�1fIRf�1�B'R ! 1f' / I II d1 ii / �u �Iis �.r�ri� _ / f Poet Development C3 J ET 7` �_ y YI�� ` `/ W t D 5 00 Ac. 'I- d tl �': -Ll ''tRT '/ ` CN 80 f Cr V \ I f Tc-12 min t', N t+ z -- / Q z w ON 65 _ 2 2 • CA-65 1" GIA 4CENTMS \ • �� ` I O O �v=s no 1 „AGENT-c \ -+�..�. ' _ / LUNGEFO � ' _ SEE DETAIL, • �'� � _ / \. / U_I w l\\\\) Te-6min / L ❑ \ /// i �'..c.EMEt•1 FOR SWM U / /. / Cn 0 o / \ 100 vio6p0 100 200 300 SATE ':NV" SCALE ' JJ° 'SC.'E]. /' \ SCALE 1"=100. W'°C .20,'7:063 -ELT 1 1 OF AN Pre-Develcpe0#' Post Developed#1 , 11111 ii - \' '\ ac DA tox /.�OA1 mch)10 3 OO cls U \ 0(t d1) O 0 cis - O(21 357,5444 cts el 4 -O(2) 9 08 cis 0(,0) cis �� q _i lVl t / r \\ �_ \ - G(tUJ-274 ofs O I,00) c ofs / l / : 1 t > ` -,- ) ., rif//��� / � ..,,'.. SOILLINE w 1 _ ��l i/ _ EXISTING ACCESS ROAD(ERN N E. r z F O23 eott.deAl ee IL _I °oa,Dev D+ �� - . �1� 5 0�<�- el )/ `\ 2- DA=2.08 Acres / y W F ' cN=eo cN=sz �./� .f wi ' �' Tc=Smin - cc _ Tc=8min ��\� j.Lj O• OO a % SbvM'A' rJJ e=6m� I 9esObe Pre-Developed#3 Post-Developed#3 - 0.4==696ac DA 3.61ec 13,eve1 Shand Filter- - - \` r+ a-a°"" 1SY Aaes ' coN-6, , co((inch).0.0 cts DA=8. 6 ACres / Tc_15 min FOREST-PRESERVED BO ma) o o ate l 0) 5 39� • / - I OPEN SPACE �. 0(2)=5 23 ofs 0(101=164 ofs 00(100)=29.4 ofs etlerloe A2_ , , C. , . / 'NO LAND / :;�`F':462 / DISTURBANCE _ evel5preetle Read _7 PERMITTED' _ , cemuted Outfatl . A6ljass / A elc jLocation • D.s.op n1. 4 5 ACRES / - 0(1 rnch)-0 03 cts Tc rrw anus • e_10 min / / , O(1o) ss cis To_ min v DA 2.35 c --- ,/ / / - L'�I SWM 'B' -6Dr` 6 VG. - j• . / Level i Sand Filter Tp b m� Level eatler R ti / -. Fre-Ceveloaec#2 Post-Dev#2 J , • •' • DA 4.55 ac e9 DA=2.26 Acres CN-62 DA 2.5 ac 40 , oisos • \ TO acre.development Aa _ ` I Cr0(Z inch) 0.0 do ()-294cte O(2) 4.7T cis 0(,0)=H 46 cis O(10)=124 cis �y I - Tt-6min - .•_• - - C(00 253 cis O(,00.=238 cts Fast-Dev El Ds+-Et' \ 1 ' / ` Level Spreads Redo 0�ease \ DA C 27.• �� Poet Dev.B2 + v I OSOSIae�A7 C 1'inch)-C OC cts b rein \ `_ C Z 2 / I �_� 1.13 acres 012) O X cis \ z 1TO-5min _. _ _ CN=76 0(1C)=140 cis Tc=5 min ' 0(100)=2.82 cis / C O / \ .. - - - .a i Past Dev.'E3' Fre-Developed#E Post Oev#&Totals w;c Reta,em z o F _- ` DA- 81 sues DA„1)35 ac Exist Concentrated Natural Outtall O O= ��t 4,,...--i,\ CN-61 CN 61 (2)LEVEL SPREADERS-E1 8 E2 g O OU Tc-5min I 0(lm1 Gook_ 0( 130 a- �u�' 5, tP/l 0(1 ,at Die c(11.30 oo,e1: ¢ gg 1 �� / ` Past Development&3 -1 ` O(10) 428 c s O floc 25 46 h L �•� / ` 7.78 acres PC�tOM.@' / O(100)-11,cis O(100)=118cis ¢¢ t `( I1 �1 i -ice=83 DA_DS2 - Pre-Developed#4 Rost-Gevelopeo#.4 1 t TO-12 min CN=76 / `DA 10.31 ac TA i,17 ac / / S y y ry C I Tc=5 min Post-D.E2 m Pc CN=62 0(,inch)_-00 cis - - / Level Spreader Reda 0 n mph)=0.0 old 0(2) 4 36 els Level 1,Sand Filter I ♦ DA-z 38 Sac preader 4O(2) 3 cis 0(101 264 cts 0(1 inch)=000 oh LR tg�r O(10) -23.59 6cis 0(100) -323Os DA=8.9i Acres I ,/,. 134 cfs O N 0(100) 62 2 els t • !- ^ - o o 1 I- _.li I� / L -- �•T6 pF L /EXISTING'S CMP CULVERT - - - - _ J I Sheettlow . n 4s, / r; \ DA 6.66 acres C/ -s \ few CN=61 / 8min (f I D.@tls \ I Christopher Mulligan / :/ i_ . q,1-61 - -- Gf'•^'�os4c #c a 031672 � T�-5min _. I Poet DelwOprtent C2 / 7 -.- _. _ Ds=4.62 Pc. Poet Development C1 / Rost-Developed#E ) ' 1• SYY lYl'E' 1 CN-eo De 4.18 Ac. Tc-12 min GA 092 CN=80 O(, ch --00 cis / Tc-12 min - Level�r Sand Filter / a(100 6F is 1 �A=9 Acids - W C3 r �-7 PM Development C9.At' I De-5.�AO. ���_. ,.' L Tc=12 min / / ) I , Cl- fi r: - T , - ► _� SW1VI/D' I z 1 / �� LLe A t, S d Filter > u -< I DA=4.iAcres Q J - tioiii I M D6,ae `� o w \\ -� _ DA=0.28 acres - ___IQ> CN=61 = A .84 -n, L Tc 8rNn ac 0 cc CN 6 O( Inch) 00 cis Q C i2 9E3 ct:: - - _ __ ,,.r(T 654 eis 100 0 100 200 300 GATE '2 NO(2' %/, ,\ N SCALEef•=10 WPC J tE7u0<V � -__ 12 SEDIMENT BASIN PHASE 1 ESC - PLAN SWM A - 2 FILTRATION FACILITIES w/ DOWNSTREAM LEVEL 1 EXT'D DETENTION 081 4 , ---- , ,- _- ,ONVERSION 50 S B RISER • EARTHEN DAM*IMPERMEABLE , \ TOP 375 00 INSTALL-01-12 ORIFII ' i DTI SWM CLAY CORE MIN TOP WIDTH ,.: --- '--L'7 TOP ELEVATION 375 35 En 6 (SEE DAM SECTION DETAILS) / F INSERT 3E5 00 INSTALL-(1I-8 ORIFII -. ' R LT7 ast 2 INVERT 366 25 --.0(' ; INSTALL-(1)-6 ORIFII , INVERT 364 06 0 -.4. / , , 60 SEDIMENT BASIN RISER ' , , TOP 373 25 , 6 CONCRETE SPILLWAY INV 375 25 .DL'`EE-,/ - 'SEE RISER&DE-WATERING DETAILS , 2BOTTOM 24 , -fd°°°°... -'11115"'- di 81•3..- ., RI%R.4,,,R,T,',J,N,D E2RnisNEG,FD-EFA,S,RI,L ,or., Ntiiii.. .0 E L7,8 __• , :10____ OUTLET ,,,,,,, .044111\41tINN'S' OUTLET PROTECTION PROTECTION SEE,ETAIL OPIA .... 1111" OUTLET PRC,TECTION E.., SEE DETAL OP I 5'LUNG.FILI HA 110 ,,S-EE'17 SEE OP I DETAIL f-ze;::;:10.00"." ireei ON SHEET 17 .., DEMISING W ... e cir TT 00Pm=„8.390: ../C i-,..•..9.,,/,--. _.........i 0 el IOW 01.1..Iel ,jar ' 0 , ----) .--- -11". SEDIMENT BASIN WI am---- ',. — —i Pm Fc ORNNAGE AREA 5, ToTAL sToR4GE P6oulR60 1.3802 CV Top 0 Pam 37625____.------------ • - - A% ToTAL sToRAG6 mown. we co' , w,8'x 24.Conc Wet. , BOTTOM ELE,, 364.0a \ ) / I)/ ,- - Tof 05 DAM REV 3-5 35 - i :111144*Mri ofr. .410 -.. . . ---. • — T\ \ , , , I 1 \, 'TOP OF DAM 402.00.....'•,..„s..-.....:. ' - , __ \ _\ \0 - , 6 MINIMUM TOP WIDTH , sf.,,&.-., \ , .-. f ,-- . .__. lEr; -I, .- 1a3Stecl Hetaning 41416 • 3,- , \ 11.0• , W. ILIP WAU_-40. ...... C------1 ,„, 9 ... ‘1,21../..... i E-- re. . . _ ., "11 \ . .48,(4,4 :-.1111---------- \)% \ . . •,,, ..- 1.x<f/ _ . ,, - -- / k ..• I "" , - `. ` / ' ,- I 411.'Illtie... .., ,44," \ .. , . 15. _ , 2 2 ' ' \44,..t, \lir1- SEE PHASE 1 ULLORA VILLAGE ,o o LI'o c ' , ---------'-,- / , "1'4_ `''' i s ,--' , , IFY_PLANS—: , , E., . : , , - . r." • 441-9 --------- ..... Alik; . 1 l , „.•••‘‘, s\, ‘ . / ,/ 7 ,\--' _ , 14. A •'\1 s 1 _-----1- - 1 . . .. . ' . ,,,,,/, Z . / \ ' • ',\\ s , ,' . , N 2 , , SEDIMENT BASIN PHASE 1 ESC - PROFILE SB#1 CONVERSION TO SWM A g 8 43C 43C 4.:(' 43C 1 2 , Water-Tight Connections(HPDE Pipe-Manholes&Inlets): Water-Tight Connections(HPDE Pipe-Manholes&Inlets): , SWM1 DISTILLING POND RISER STA 14,32.01 425425 THE ADAPTER SHALL BE THE SOLE ELEMENT RELIED ON TO ASSURE-- A FLEXIBLE, TOP 396 65 425 THE ADAPTER SHALL BE THE SOLE ELEMENT RELIED ON TO ASSURE A FLEXIBLE, ' 407 WATERTIGHT SEAL OF THE PIPE TO THE FLEXIBLE CONNECTOR AND THROUGH THE WATERTIGHT SEAL OF THE PIPE TO THE FLEXIBLE CONNECTOR AND THROUGH THE INV OUT 392.25(61/1141 DISTILLING POND TO SAND FILTER RISER) 41,,,A.IN 0,, CONNECTOR TO THE MANHOLE OR OTHER STRUCTURE.THE ADAPTER SHALL CONNECTOR TO THE MANHOLE OR OTHER STRUCTURE.THE ADAPTER SHALL / 42C. 42C CONSIST OF A RUBBER GASKET WHICH FITS CLOSELY INTO THE CORRUGATION OF 420 e CONSIST OF A RUBBER GASKET WHICH FITS CLOSELY INTO THE CORRUGATION OF "4a. ,'" THE PIPE. THE PIPE. / C 415 415THE RUBBER GASKET ELEMENT SHALL BE CONSTRUCTED SOLELY OF SYNTHETIC OR L,E THE RUBBER GASKET ELEMENT SHALL BE CONSTRUCTED SOLELY OF SYNTHETIC OR ' / NATURAL RUBBER,AND SHALL MEET OR EXCEED THE REQUIREMENTS OF ASTM F Chnstopher C NI II, . NATURAL RUBBER,AND SHALL MEET OR EXCEED THE REQUIREMENTS OF ASTM F SINM1 SAND FILTER RISER Le No i ,2510.ASTM C 1478,AND ASTM D 2321,SECTION 7.10-MANHOLE CONNECTIONS. 2510,ASTM C 1478,AND ASTM D 2321,SECTION 7.10-MANHOLE CONNECTIONS. STA 13.28 79 POMD 41C ,E., 031872 ..., 41C / I TOP 394 40- E.., CS/12122S .Fiotd,m.‘' 1 INV IN 35C CC(SINM1 DISTILLING POND TO SANE FILTER RISER) ' 405 ' ,/- - CONVERSION TC INV OUT 386 CC(SAND FILTER TO DRY POOL) TOP OF CAM 402 00 E MINIMUM TOP WIDTH 4,5 .."' 50 S B RISEP TOP-375 00 100 YR 40C, ...„-,- / 400 INSTALL-(1)-12 ORIFII -- -10YR-11"---- REMOVE CMP " . . OUTFALL CRITERION ,,INfVERT 369 00 --- --.-— .. AN I-T VORTIX& SB1 BOTTOM RISER -- e4184.en.).212 eft INSTALL-(143 ORIFII INSTALL TRASH RACK --- 395 STA 11-09.39 ,-- 395 1124ftr Peety-..II.cfs .,INVERT 36625 ---4 2 YR 395 LLJ SWM 1 DRY POOL RISER /--, TOP 373 25- ,„../ I St%Reduction INSTALL-II,-6 ORIFII f•wf*, -- STA 12,66 06 98 "21E1% INV OUT 356 00(SB1 BOTTOM OUTFALL) / .,INVERT 364 C0 TOP 374 60- ./.. - C-.5 Z 39C 39C 39; 1 3gC INV OUT 370 00(SB1 DRY POOL TO BOTTOM BASIN) 0 SB1 BOTTOM RISER /1 / STA 11 09 39 1 / r Cn . 100 YR WSE 374 34 / CC ,.,, E.6c.0.46,a 6...• ....- '3EE TOP 373 25 IC YF VVSE 371 63 LEVE'II EXTENDED DLL NGE POOLE5E WI NV OUT 356 00(SB1 BOTTOM OUTFALL1 2 YR WSE 368 14 sun FtLyER > I TO,,ORAGE REQUIRED +3,90..-.GN 4TENTION -I , icTAL T.TORAGE PROs,10£0 '490 CY .., Y.WSE 366 54 .., I sorrom Etes 364 Of TO,rlf WA,E. .1,z5 , - Je -.:. TOP OF DAM 3,5 3:„ WOO 15 762 C F NWSE 364 00 TOP OF DAM 376 25 F MINIMUM MOO WICTH , +E. Z .......... Z 0 I E MINIM/MIDP WI DTP / ...-- C..) _ 4'325. CI- 0 i --- _ A < fa_ Z .-3JT_ET . ' 1 0 .RcTECTION -- I SEE LETA&C E -" ETE IDE-411_OP . E CONCRETE SPILLWAF INv 37S 25 CC (7) CL 2ECTTOM ca ARMOUR EACASLOPE w 50 c,.CL 0 > f 5 -F( 1E 1 _- - (--- - I , ,-. ---- ,---- _..._ ..„-...( 0 RIP RAF w P P MIN CERT, 24 SEE DEALS I II . ....1 f FFY5/ , D l OUTFALL ELEV 354 00 , OUTFALL ELEV 354 CC I 0 1 o*oo 11000 12+00 13+00 14+00 15+00 10000 11.00 12+00 13+00 14+00 la 15+00 DATE 12 NOV 21 SCALE 11 1' 40'V,' 10' SB1 PROFILE SWM POND 1 PROFILE IJOB 20.1674 H 1'=40' V 1"=10' H 1''=40', V 1"=10' WPC) _X2190060, 4 , , -. 1" . WAIIIi."11... 4C SLEET 1 3 CC .g RC 9i_E SCALE SEDIMENT TRAP #4 TO SEDIMENT BASIN #2 PH. 1 - PH. 2 ESC - PLAN SWM B & C - 3 FILTRATION FACILITIES SEDIMENT TRAP N4 1 1i // ' I �� r i > 1� t sgy (SEE SHEET B FOR DETAIL) - / 2Z2 ' Y/ �"'-'' 2' � •, '''I \ /� q F TOTAL STORAGE PROVIDED-419.6 CV - /`• �oy� - \- BOTTOM ELEV 400 00 I ,�' v 1 TOP OF DAM ELEV-aD6m l 1 \ � t� ,i. o \ ��\ Szdli o I �1 L A CO1 INLET ONTOSWM 9' Or,1 • - :MINIMUM TOP WIDTH -- w w Z _- -_. III ,I I _ — _ O. 1 I (1\ II� I/11\\\ --- Q U - SEDIMENT TRAP SPILLWAY - - - I\ \ _ WEIR LENGTH- 17 -- CL i RIP-RAP Y. T - - SEE SHEET b FOR DETAILS \ _ EMERGENCY SPILLWAY INVERT 369 75 E v CL 1 RIP-RAP EMERGENCY S%LLWAV - - ., L 16'3t5SLOPE _ ..��// - -. w„ % .AND HI_I LHS(1T MIN. 'e4 \ INVERT 369 75 - L 15 31 5-SLOPES - -- 3 WM.HLIHA •'24257k 21.25 '- SEDIMENT BASIN#2 DEMISING W :- OP SAND=37R no / SEE SHEET 15 FOR DETAIL _ CL 1 RIP-RAP - TOP -376.. - - - - ( ) EMERGENCY SPILLWAY BOTTOM 368+ -- -� T CF OF DAM 661 ACRE DRAINAGE AREA INVERT 361350 / MIN WIDTH 8' - STORAGE REM--885 7 CY L.20 3 1 5-SLOPES (SEE DETAILS - / -,/ -- . � TOP ELEV 382 CO 'STORAGE PROVD=1339 4 CY `� ..- TOP OF DAM - F'.. 4e4 -- BOTTOM ELEV-=368.00 CONVERSION TO % /•4 .®Y MIN WIDTH e' �:t`Y'' • TOP OF DAM ELEV=382.67 60 SS RISER -,�., '� \ ftam TOP ELEV-370.00 �� • TOP 36.o< " 'ap INSTALL ORIFII'u INVER276_ NJ6TALL-(3)-0ORIFI :;c37, �1 g OUTLET PROTECTION Pi' . SEE DETAIL OP2A �\�/ -i4.?. TOP OF TOP `�' I A _ ON SHEET I7 / •• :41 !le, A I I• _ , • /le' /, ./ ' ' �" 11�� .y 11.E.iiiv� MINI�MTOP WIDTH .� �P :I •\ / • .i60 S.fi RISER *.aeil. F/ • �,g�g�(ro;Ere27sEE0TEDcETTnALN,-/ i TOP-3JJ.9G �// '•F1. _ �� _ /9 / C v u1 �� - SEE DETALLS - \ dd' -- OUTLET PROTECTION /� "\- _ ,,^/ `� J CL Tc ET PROTECTION. SFE DETNL OP2Ca t t / CL'IIET PROTECTICM1 EE CETNL OP26 v \\%. % SEE DETAIL CF^ y g� ON SHEET i] VO, \ , ,g'P - ON SHEET I] � / - O O \ SHEET \ _ O> OP. �J O /l TRUCTURE </".\.),, 1 a Y/ TOP OF DAM.370 00 5..E DETAILS' ] �� , 8'MNMUM TOP N1DTH��� \N p ` / j, _ --. _ Q SEDIMENT TRAP #4 TO SEDIMENT BASIN #2 - PH. 1 - PH. 2 ESC PLAN SB#2 CONVERSION TO SWM B & C FILTRATION FACILITIES N.I 4-, NOTE: DURING PH.1,CONSTRUCTION SEDIMENT TRAP ..a., "'' 43c R'IS n4 SHALL BE UTILIZED.AS CONTRIBUTING Water-Tight Connections(HPDE Pipe-Manholes S Inlets): 1GGRR WSE-4432 } N 10 YR WSE-40432 INS TALL DFt INLET AREAS BECOME MORE STABILIZED,AND STp418 2 YR WSE=403 87 72 MP- 40365 425 eo` 42, ' NO LONGER NECESSARY FOR ESC CONTROLS, 42 42' THE ADAPTER SHALL BE THE SOLE ELEMENT RELIED ON TO ASSURE A FLEXIBLE, I YR LE/SE 403]2 INSTALL DI-1 AND OUTLET PIPE INTO SBS2 AS - WATERTIGHT SEAL OF THE PIPE TO THE FLEXIBLE CONNECTOR AND THROUGH THE Z-a ' SEDIMENT TRAP S4 - ST4 RISEF „� • ILLUSTRATED. - 2' CONNECTOR TO THE MANHOLE OR OTHER STRUCTURE.THE ADAPTER SHALL STA 14-62.20 4^_0 4«' ST4 RISER 420 .CONSIST OF A RUBBER GASKET WHICH FITS CLOSELY INTO THE CORRUGATION OF STA 14-6220 THE PIPE. TOP 403 ES - TOP 40365- INV OUT 394.00(ST4 OUTFACE; REMOVE CMP _ 4.: .,KyTK 0p 415 INV OUT 39400(ST4 CUTFALL) -- -°IF 4 •5 THE RUBBER GASKET ELEMENT SHALL BE CONSTRUCTED SOLELY OF SYNTHETIC ANTFVORTIXB 7R '"" OR NATURAL RUBBER,AND SHALL MEET OR EXCEED THE REQUIREMENTS OF ASTM I00 YB WSE 390.64 - 10 YR WSE 37880 0 TOP OF DAM-408 W INSTALL TRASH-RACK s2 41C ; - 4,C 41r F 2510,ASTM C 1476,AND ASTM O 2321,SECTION 7.10-MANHOLE CONNECTIONS. _1 YR`NSE 377.64 6'MINIMUM TOP WIDTH, I 4'C (' 1 tYR WSE-3767fi / !! r SB2 TOP RISER 1CC YR cN t pn C MuWgan SB2 TOP RIDER COhNFA510N TC _STA 13-0911 _,� _iCiYF'-- 4C= Lk.Pb 40E 4C5 4C5 _ STA 13-�ii 1 60 S.B.RISER TOP 377.90 ter• s WB]2 $ .-TCF 377 SC - TOE..3J7 90 - INV IN 372.0C(ST4 OUTFALL) '� - a4 u �Mc °� CS'1222 �`' 4cc -- INV IN 3,72 00(ST4 OUTFALL, a0� 4 INSTALL-(1)-12 O%FlI_INV CUT 364 00(SB2 TOP OUTFALL) J,-,C Roy INN CUT 364 CO(SB2 TOP OUTFALL)� - _ %.INVERT-376.06- 395 -. / 395 WINO F••D 9.614:b 9`_ 3a5. B1'%R•.M.IM. 1 so,:R WSE-366.6J— ANTI-VORTEX 8 - 10 Y WSE_367.36 2 WSE 363.58 INSTALL TRASI+PACK / - SEDtIRENT BASM / Tq ER 390 c5 V L c W MVSE+736 23 INVERT 362 JORIFA TOP OF DA 382.00 / CONVERSION ION 38, 6` co TOP OF DAM 382.00 INSTALL DI-1&OUTLET PIPE 385C't�1 Z 38:: INSTALL 8 OUTLET PIPE SB2 BOTTOM RISER 1- PRIOR TO �.,/ SB2 BOTTOM RISER / IMMEDIATELY PRIOR TO O STA 21 5 1p0 yq , 'OF ST"TO STA 11-2115 - CONVERSION OF ST,4 TO INSTALL-(3).0 5 ORIRI THE FINAL SWM2 FACILITY 3P (n tibC TOP 36708 BFOIYCNT TRAP N/4 -- 1 THE FINAL SWM'B FACILITY 3tiC 38_ TOP 36708 p INVERT 362.0o 10 INV OJT 362 Or(SB2 BOTTOM OUTFALLI REMOVE CMP is LLI INV OUT 362 C0(5E12 BOTTOM OUTFACE, 2 YRCC ANTFVORTEXB 1 J" _- INSTALL TRASH-RACK J_ Z �, I TOP OF CAM 370 00 r FILTRATION FILTERS' ! Z O 1 1 e MINIMUM TOP WIDTH __ Tv CIC"Rv'A'12 \ t�CR_ _ Al •El K ( 0'9f d ❑ - ) . _ 1 _- j 2 Filters .AI Y ..n43 /.,,.I( ,'ET, Z M c9 1 1 1 74°b 2 YR 1 74°e c O 6. 24''„ 5B'k +I 1 _ 6' 24"41' U c a �CU'TFALL ELEV 3E CC 1 �` I-t —� CL$FAL.ELEV_6,IX > 1 I O1 CUTLET FRC'ECTIOE _E 1-CU LET FRCTECTICN J um- SEE DETAIL OF2 SEE DUAL CF2 C\I ON SHEET ON SHEET�7 ( Z N CO 0 +c 10+00 11+00 12+00 13+00 14+00 15+00 10+00 11+00 12+00 13+00 14+00 15+00 SB2 PROFILE SWM POND 2 PROFILE H 1"=40' V 1"=10' DATE 12 SCALE a7 1 IC' Jc H 1"=40', V 1"=10' C F •■••••■RI�� 1111111111111 C 4C WPO 2021001363 PROFILE SCALE SHEET 14 OF '9 SEDIMENT BASIN #3 PHASE 1 ESC - PLAN SWM D - FILTRATION FACILITY w/ DOWNSTREAM CONNECTION TO SWM_E , — _ �� - 4 o j O z �( w , / !, / . li >4j• r orw0886 �a U 1 1 _ _ 402A / ,// i 1T ��� 407A. :I _ _ \, .// `` /% / 11-00 / / .Op _` IOOYRWSE-41779 , -� /< �._IOYR WSE=114.98 0 / ��� • //' // O fit O V !N0 // o k-F-F I `"2 YR WSE 413.85 b G� / / •/ b 0 / 1 <1 YR WSE'413.46 tr 0 / / ,/ R 0 ).etLI � wov6544GF J. // s'I �� DIY I 04 di - / sFL14EMB45N 44 /^ tr c0 ...� �,n NWSE413.25 �� / J J lJe, ,V / / SEE SHEET to POP OETNLI 4 ....� , -. 'y / .�� • ., J bV •��.! 2KDRWN NOW.PREP +•�.!� ��, � A _� TOTAL STORKS REWIRED-562 BCY _ ' 00 ' roTALsroPA�vPowEO-'mac l -...---1.--, / ) 1 1 ' / BOTTOMELEL .410,O0416 X - 'iI `\ ;'/�/ I I/ TOP OF DAM ELEV.41446 b� / \\ p. ' ' _ SEDIMENT BASIN3SHALL BEA 'II I __- SEDIMENT TRAP UNTIL THE STORM / II)t SEDIMENT BASIN 3 SHALL BEA / i -� - x,I.•-n SEDIMENT TRAP UNTIL THE STORM (\\/ OSEWER OUTFPLSTRU SEDIMENT ' ;S' _ \\SEWER OUTFACE INTO SEDIMENT - BASIN 4 IS CONSTRUCTED(OMIT ` •'• I !U NT OBASIN 4 E CONSTRUCTED(LIMIT ICONTRIBUTING DRAINAGE AREA TO �'�,,''''__ �`P UNOE POOL 1CONTRIBUTING DRAINAGE AREA TO / LESS THAN 3 ACRES)NOTE DIVERT !,awy � I EL-21325 1 %.:..-%... ... - RUNOFF TO SBM4 UNTIL SB113 BASIN AN: ,i I EE DETAILS) LESS THAN 3 ACRES)NOTE DIVERT V / &OUTFALL INTO SBIF4 IS FULLY ' /ALL RLRJOFF TO SBM4 UNTIL BASIN - _ / INSTALLED8 OPERATIONAL CONVERSION OF /\ ! f F�`6 SWM L1'OUTFALL IS OPERATIONAL ` � _ !, /" - - _-_ _� 36 S B PERMRISERANENT , I\ _ \ __ _TOPEPMANENT . . TOP41325 / _-- , 6-1 HOLES 2 COLUMNS / AFTER OUTFALL PIPE OUTLET i INV=-4101X / - I PROTECTION AND DOWNSTREAM IM/'•41tA0 ' ' CONVEYANCE SYSTEM IS / I \\ ¢ OPERATIONAL.INSTALL SWM to / , - .._ _-- _ .__,RISER AND UNPLUG CONNECTION - - _-._-- - -- / PIPE PREVIOUSLY INSTALLEDI _ _ • AI-\7. / � \ - - 3 8 U ' / SEDIMENT TRAP SPILLWAY 36'RCP RISEF TOF=41325 --'"- - -- -- '� /% - - - L.\ - '4 z z #111. ' WEIR LENGTH=9' s SEE SHEET B FOR DETAILS4. , ¢ O¢ - 0 w SEDIMENT BASIN #3 & OUTFALL TO SB#4 ESC - PROFILE SB#3 CONVERSION TO SWM D m si CONVERSION OF ---- ---- -_.,. 36 S.B RISER Water-Tight Connections(HPDE Pipe-Manholes&Inlets): 1 TO PERMANENT 4.iS ANEN w N N + TOP 413.25 100 YR WSE=41779 C SEDIMENT BASIN I+ s 43 6-1 HOLES 2 COLUMNS-10 YR WSE 414 9B 43 $'� .SEE SHEET I4 POPOET+L. FILTRATION FILTER I' -�- THE ADAPTER SHALL BE THE SOLE ELEMENT RELIED ON TO ASSURE A FLEXIBLE, - � _ INV=�41000 2YF WSE 413.85 WATERTIGHT SEAL OF THE PIPE TO THE FLEXIBLE CONNECTOR AND THROUGH THE 42K OPAL..AREA - - INV--411.00 1 YF WSE 413.46 O N CONNECTOR TO THE MANHOLE OR OTHER STRUCTURE.THE ADAPTER SHALL TOTa.STOPKf PEOUMEO 5626 cc. Tv (1 01'Fv'A'12 TOTAL STORAGE PROS.° 'mn Cv REFURBISH OR INSTALL WOV-6,544 C F El 25 2 4e_ ,,,NWSE=41325 TRASH RAC/ANTHVORTIX - c CONSIST OF GASKET WHICHFITS CLOSELY INTO THE CORRUGATION BOTTOM REV +t0 ao RAS K A RUBBERBBER OF TOP OFOM4 ELH-aI4s0 - Al-(Tv'tlf K'(M-atj(X) =THE PIPE. TOP OF DAM-OtB.80 / / _ -"f AI 6.725113.5)Wt 1)01.671 - _ - —120 Al � 24,@ P74 NATURAL RUBBER,AND SHALL MEET OR EXCEED THE REQUIREMENTS OF ASTM F FILTRATION 9 STORAGE VOL IOO YR SPILLWAV 41]25 ? C 2510,ASTM C 1475,AND ASTM D 2321,SECTION 7.10-MANHOLE CONNECTIONS. Tv v,�7A'Tv �� 1 yR 415 ?_ <._ 41'5 41° e'WEIR LENGTH 215.5 C _.:- C TV 6 544 L1 20 CY CL I RIPRAP w(FF • TV.41150 / > . V.Elevation-41'5C' FULL DEPTH- IB KEY 12 -. I <..:' �' - — All ,r Vr! fi550r1 . • w,� ChristopherMulligan / .-; r( ! �3E B RISER*, 4C5 <::` / q•- Ltd® 4C5E44C512 060vt 1 - ANTI-VORTEX CEMCE/- I TOP 413.25 0 • • SAN FILTER UNDER-DRAIN 400 . /'� INV OUT1 406.00 4)L C,:.. fit SWM E 400 � oCp% 4 .00 DOWNSTREAM-FUTURE6 PERFORATED .,c 4•ND ! -p-24'HOPE tot 10 71% S843 OUTFALL PIPESEWERRM JACKETUNDER RAIN w;i2 STONE • JACKET WRAPPED IN F F ;95 __ 60 LF OF 1B HPDE 395 INVERT 406.OG ' _B-N(OI/T) 402.00 MIN SLOPE I°bC FUTURE STORM SEWER 39C .J e5G -, - SYSTEM TO CONNECT SWAIM Z _ OUTFACE INTO SWM£ - 3E6O --J OEE SHEEN 1fJ- \. -_" ,_ 111,01,.. FOR SBMd& r", " LU CC -V SWM J.f1NVFFSI(7N! ._. Z z 1 _ - FUTURE STORM SLIYEF SYSTEM TO j CONNECT SWAM OUTFALL INTO SWM'E I I >7E O :F,'TURE PH�STURM SEWEP SVS'EM: ' ' 1 L u)! - - ,cI\\ O.TFALL ELEV 30+CL GCiFAED., E E 3EE CC LETL'IN ■ ' OU PRTECTK K SEE DETAIL CF3 _ SEE CEE'CRAIOLNG> j (n OK SHEET 17 ON SHEET 17 00 E Z COco € I s D u) v v e v _. v o 10+00 11+00 12+00 13+00 14+00 15+00 10+00 11+00 12+00 13+00 14+00 15+00 SB3 PROFILE 10- SWM POND 3 PROFILE H 1"=40'. V 1"=10' H 1"=40' V 1'=10' DATE 12 NOV 21 SCALE H 1' 40'V 1' 10' JOB 20.1674 40 0 40 80 120 C - WPO 202/100063 4C SCALE 1' 3C PROFILE SCALE SHEET 5 CF '9 SEDIMENT BASIN #4 PHASE 1 ESC - PLAN SWM E - FILTRATION FACILITY w/ RUNOFF REDUCTION X . . _ `L _ 1 • Pe , I , :�� - - I j; r/ ��� . z �• ��� - Ma v L ow Q I r 0�ET ��Ro I e I ��Lrr ZQ 0-1<m I, t GE SING IVA �_L I V F/5 0 w e I�g` M 60 RCP RISER st- \ L`� I TOP-'�790- L� FrS Z Z¢ t \ • Bd TTOM.=38LS 1 , 1-I a _ \ , TOP 3SSER _ {I I .E_E _\ ` $� SEE RISER / -- I� - ) - ' I. - \;-'! _ 1�.� 7'\ DE-WATERING / \��� \ �'I.-)_eL= µ- 1'-r a 5aOETARS \ 1U-1 ��, UNLORF SUBnN'16b --i+�4y,, \/c+ (\ r III . , s\ FUTURE 6TORr.1 SEWER ►CAM .- .- 1 1 IV 370 _ I I „, .��r1 1• 1� , 1 �., `:�\ -________--,7, ' / +�;��9FR:M7Y.Ie4�. !I 7,,,,,,,, I���. .1r 11.00 ., i , , xi, id-(O0.'' \ i'''' '-'-':----- --:-7.-.-‘-.-'V A I 0 I I":411ri II I I%L I� III( ii_ ,.. ....kw.._ if Sllll44' // 41\\.12- � �M.r� �.�i��0 �� :�' ' / �� 'd �__ ate_%r "'e!- ;; - Fr . `_ • Ptt SHttl 1S /,. V4 0 / SEE SHEET 19 FOR DETAIL) / .04 ^., -4"� 7 c_DRAINAGE AREA _ -. -' OTAL STORAGE REQUIRED=-2,345 0 CS' ' . - (P / SEDIMENT BASIN 44 OTAL STORAGE PROVIDED=43352 CY 10.00 _ �Nx% / z ��x,/ ,/ EMERGENCY OTTOM ELEV-366 00 K i (Mili -110W ,- V SPILLWAY OL'TFALL I.•• -,r A=- - ! '- --'" OF?w 5 - - (SEE DETAIL: I ,•' .'' ,/1' • SEDIMENT BASIN #4 PHASE 1 ESC - PROFILE SB#4 CONVERSION TO SWM E w 0 P ga Z O - N 4[3 yTM op Water-Tight Connections(HPDE Pipe-Manholes&Inlets): - SB4 RISER - -- _ SB4 RISER 100 YRWSE=3e005 „., 479 - - STA 13-27.56 CONVERSION FROM 10 YA WOE 377.85 STA 13.27.56 3 r ct- 3 TOP 37800 395 "" - TOP 37BW' W SB RISER 2YRWSE-374 10 395 THE ADAPTER SHALL BE THE SOLE ELEMENT RELIED ON TO ASSURE A FLEXIBLE, 1 YRWSE=373.04 Y^ - �. WATERTIGHT SEAL OF THE PIPE TO THE FLEXIBLE CONNECTOR AND THROUGH THE BUT 362 OC(SB4 CUTFALL) INVOUT 362.00(SB4 OLITFALL)- -' TOP-376.00 WOV-15.530C.F CONNECTOR TO THE MANHOLE OR OTHER STRUCTURE.THE ADAPTER SHALL - - - EtUIMtNI HASIN F4 OUTFACE CRITERION_ lekTALL-I1)S ORIFII a MNSE-371.60 _ Christopher C Mullr on CONSIST OF A RUBBER GASKET WHICH FITS CLOSELY INTO THE CORRUGATION OF SEE SHEET 19 FOR DETAIL) - - 4.(.Y.P'-I .3....O 'n INVERT=371.6C P 9 THE RUBBER GASKET ELEMENT SHALL BE CONSTRUCTED SOLELY OF SYNTHETIC OR T LSTORAEEREA g(1Yr.Past)=2.86 Os - INSTALL-12)-8 ORIFII ti p5/672 -- - TOTAL STORAGE REQUIRED-23450 CY 66%Reduction TOP OF CLAM•392.GC ii INVERT-272.60 REMOVE ANTEVORTEX Bd c[c es+`; 36E TOTAL STORAGE PROVIDED=4.3352 CV - --- - 18 ' s a'MNIMUM TCP WIDTH DEVICE 4INSTALL TRASH 3E5 A4 c' BOTTOM ELEV--368 00 RACK(SEE DETAIL. NATURAL RUBBER.AND SHALL MEET OR EXCEED THE REQUIREMENTS OF ASTM F -P EMERGENC,OVERFLOW _ I.F OF DAM Fl FV=-'+R96] -- 100 YI7 3� •3610,ASTM C 1478,AND ASTM 0 2321,SECTION 7.10-MANHOLE CONNECTIONS. - -- _.. INV 381.50 f - -�- - e'WEIR LENGTH 2 I S.S �0 VR _-.... 1 OUTLET 30cy CL1 RIP-RAP w, --- - -- - 3& OUTLET --" _.. PROTECTION r / PROTECTION UNDERLYING F F 2 YR 1YR 375 37E SEE DETAIL ON �/ ,r- 375 - SEE DETAIL OP4 -,-' ON SHEET 17 -`. - ON SHEET 17 / - I 1 1 1 1 370 ," 37C ::; TV=368.15 370---- C.) z 36E 3E5 'RE J 365 g w /-� 2d•HOPE V,1 45% 136 24•PDPE Cu 1 4S% �,- 36. FII TRATION FII TFR.S'F' - ' OUTFALL ELEV 36C OG I OUTFACE ELEV 36C CO TV (1,)•Rv'Ar12 I Eu.20 706/26 1-10 358cI �_ Z Z . I L / / Al !Tv'rift-K'/hf (Mph • 0 f E - / 2 REers i,r.At 10 353.1/13 543 1).,E7 I C� - I 2 PAIR E PERFORATED I 2 C,At 443 c 1 ( I - --- - LINOERDRARAISE W 12 STONE IZ r --- r JACKET WRAPPED IN F Q IM'ERi 37.OG 1 PILTRATION TV STORAGE VOLUME(EACL,. fa_ Z c. I MIN.ELOPE '4 T., IC]5''fx it ur E leval,c.�F 366-E O > J 0 k 0 10.00 11.00 12+00 13+00 14+00 10+00 11+00 12+00 13+00 14+00 IC SB4 PROFILE SWM POND 4 PROFILE 1 H 1"=40'. V 1"=10' H 1"=40' V 1"=10' DATE 12 NOV 21 SCALE H.1' 30'.V.1' 1 C' 40 0 40 BC 12C 0- JOB 20.1674 ■ ■ ■ ■ ■ r 4r WPO 2C21x063 ■ ■ ■ ■ ■ 110 MMIll SCALE 11 30' PROFILE SCALE SHEET 1 6 OF oP OUTLET PROTECTION SPECIFICATIONS Es EMERGENCY SPILLWAY SPECIFICATIONS Es 100 YEAR TOP OF DAM EMERGENCY SPILLWAY SPECIFICATIONS LEVEL SPREADER-POA 2. POA 3&POA&E1&E2 WSE 37435 WIDTH 8'Ei CL I RIP-RAP KEYED 12' ELEVATION 375 35 100 YEAR TOP OF DAM WSE 37615 WIDTH B'(i ELEVATION=376.25 b INTO NATURAL GROUND uEv LEVEE sPls.<oEr. 411) iEn MINUNDER DEPTH Ws b 4-24'PIPE ellin CO 6.1 6 t INTO Etan*w+a oIrei P UNDERSI : ;t EME5tCLIRIPRAPNE6 CONCRETE "- H°i 'i oP OUTLET PROTECTION SPECIFICATIONS Es EMERGENCY SPILLWAY SPECIFICATIONS ES#1 A ARMOUR BACKSLOPE CI) Eg a a /00 YEAR TOP OF DAM ;OF DAM OEBIca•E0 FOS STA.nr WSE-368.89 WIDTH--e'00 CREST OF ELEVATION=37000 ELEVATION=375 i_ I�OF DAM EVATION=376 25 CLIRIP-RAP KEYED 12D �' ^�,(E INTO NATURAL GROUND ® z I+w bESK+N olscHnw�E .,.n SS 18'MIN DEPTH W/ t 36 PIPE 010=37 95 c1s _ 24'HDPE PIPE M.N O 411110 UNDERLYING F F II ^i HE NANi a?. OUTLET PROTECTION �11� 20'BOTTOM OF (SEE DETAIL OPIB) i 17 APRON LENGTH•20' SPILLWAY WEIR T u+L - 3D0=9,0' EMERGENCY LENGTH - - LA=20 SPILLWAY W DO.LA-23' BREADTH=8'(a 18'CLI RIP-RAP ELEVATION•368.50 2 1 SIDE SLOPES 6'CONCRETE 290,,. Es EMERGENCY SPILLWAY SPECIFICATIONS 24'MIN CLI Figure 20:Level Spreader:Pipe or Channel Flow to Filter Strip or Preserved Open Space OUTLET PROTECTION SPECIFICATIONS TOP OF DAM RIP RAP 01-.; - W S E 4'1:/7_ WIDTH-=8'4.4 ELEVATION--418.80 Version 1.9,March 1.20 t 1 SEE SHEET 12 FOR LOCATION&DIMENSIONS Page 8 of 20 CLIRIP-RAPKEYED12' 1-� CONCRETE DEMISHING WALL SWM 'A' SWM A PLUNGE POOL WEIR BOX INTO NATURAL GROUND ® 3 ROWS OF r 24'PIPE INV. =370.00 S• N 1B'MN DEPTH W/ O TOP WALL = 39C 5C (2)-1 HOLES TOP DI-1 374 60 UNDEFLYINGFF EMERGENCY 8'BOTTOM OF 100 YR. ELEV. = 376.15 SPILLWAY INV, =371.00 SPILLWAY WEIR 2 — ELEVATION--417 INV. =372.00 O z z LENGTH CONCRETE SPILLWAY APRON LENGTH=e"2' ELEV. = 35.25 � 3DC=6.0 `_1 I RIF-RAI U M W=DO-to=24' e . o�o � ES EMERGENCY SPILLWAY SPECIFICATIONS \/ j � ' __ 0 00 TL JAM 77iL, WI h E'@ r—6" BOTTOM OF POND INV = 370.00 ¢ w L OP OUTLET PROTECTION SPECIFICATIONS ELEVATION-- 8200 3.000 PSICONC WALL ELEV = 370.00 o w 135 YEAR w/g3 REBAR 0 8'0/C INV = 364 00 IS VERTICAL ALT SIDES FROM w WSE38005 I STEM INTO FOUNDATION ACING ST'D DI-1 _ ¢ ___ CLIRIP-RAP KEYED 12' ,� r BOTTOM WALL = 388 50ii HORIZONTAL O/C(ALLP REBAR WIER BOX INTO NATURAL GROUND C�[� ® - t 1E'PIPE Ow 314 ch EMERGENCY 8'BOTTOM OF • c ' . 3'MIN FROM OUTER) t�.., SECURE DI-1 m n-¢ - --_- R 8'MIN DEPTH W/ I I GRATE TOP UNDERLYING F F SPILLWAY SPILLWAY WHIR I� II1111111 TO STRUCTURE ELEVATION-=381 50 LENGTH 2 5 APRON LENGTH 22' 18°CLI RIP-RAP 12• w 2151DE SLOPES SWM D UPPER FILTER PLUNGE POOL DEWATERING s g 3LA=2' CONCRETE DEMISHING WALL-SWM'B' w=Do-LA=265' OP OUTLET PROTECTION SPECIFICATIONS TOP WALL = 376 DO 3 ROWS OF z- - (2)-1" HOLES DI-1 INV. =406.00 TOP = 413 25 INV- =407.00 —100 YR. ELEV. = 417.79 TH Op• INV. =408.00 I•V 100 YR OVERFLOW 4,`v t'i OP OUTLET PROTECTION SPECIFICATIONS INON-TURLGROUN • INV. = 417.25 En INTO NATURAL GROUND >• J. -� " 2 IF MIN DEPTH W/ in in e-18'PIPE 010=30.6 Cc ' -�� UNDERLYING F F o,2 /, C CL RIP-RAP KEYE0 12�.. c•. / INTO NATURAL GROUND -A' Cnrlstop Christopher MulEgon K.w. Ar S®' 1E'MIN DEPTH W/ mc. 24'PIPE 3DG-4.5' •V 4r're44c5;12.22 +� UNDEFLYINGFF '�—6 BOTTOM OF POND INV = 406.00 0NAL K,.o LA-=22.0' w,000 PS CONC. WALL 4. ELEV. = 406.00 W=DC•LA=e"35• //3 REBAR O 8"O/L INV = 402.00 VERTICAL ALT SIDES FROM APRON LENGTH=TY 300 60' , STEM INTO FOUNDATION $TAD DI-1 p OP OUTLET PROTECTION SPECIFICATIONS BOTTOM WALL= 36800 i HORIZONTAL SPACING WIER BOX W DO LA 26.0' t2"0/C(ALL REBAR .I J"MIN FROM OUTER) SECURE DI-1 r •, I I I I GRATE TOP LLJ J CLI RIP-RAP KEYED 12' - '-I I I I I I I I I I TO STRUCTURE INTO NATURAL GROUND 4.5' -I Q 18'MIN R WR 4-24'PIPE /2" v L~LI oP OUTLET PROTECTION SPECIFICATIONS UNDERLYING FFa. TYPICAL DAM SECTION Q o I VDOT/e3AGGREGATE 2'MAX FROM TOP ELEV. 8 0 H IMPERVIOUS CLOY CORE �- APRON LENGTH t 2' { /(COEFFICIENT OF PERMEABILITY Z KEYED E'INTO 300 6.0' I�( EQUAL TO i X 10'LM/SEC i J L jcJ I NATURAL GROUND �e,r 6'%FE 0IC a 50 cls ) LA 12 _ 4 1 E I // 1 2 0' 1 Z L 0P2B NCER. NG f w �` f W DO P 4 2 VARIES, NNye v^e 2 w SHEET FLOW MEASURE-UNCAPTURED. NON SWM AREAS // ��9da CL CL Q EXIST GRADE 41a II�l MN{{�1 r 1 4'MIN. Q_ ZZ APRON LENGTH , 1 ��B�IuhUI'�1 Mk c''r�l' L •PROVIDE MINIMUM 6'FREEBOARD BETWEEN TOPII :.CC 2 C OF SIDE SLOPE AND DESIGN HIGH WATER EMBANKMENT MATERIAL (SELECT BORROW A E 4'MIN -- r 4 0 - COMPACT TO 95Z MAX DENSITY O > CC t1 ;- _A . 2 AS DETERMINED BY THE MODIFIED LL SHEET FLtOW MM 2 NOTES PROCTOR METHOD ASTM 0-7557) 1 I- A— __-__` i + MIN SIDE SA PTO i STRIP AND SALVAGE TOPSOIL FROM EXISTING GRADE W17hlA THE J� j Kw OUTLET PROTECTION SPECIFICATIONS venE?ur sEDnON ro OR FLTER STRIP TOE OF SLOPES PRIOR TO CONSTRUCTING THE EARTH DAM EMBANKMENT C - PAVEMENT DOE 2 PLACE SALVAGED TOPSOIL ON EARTH DAM SIDE SLOPES, D cc _ - N°s wf'r, SEED, FERTILIZE AND MULCH IN ACCORDANCE WITH VDOT SECTION 603 0 VDOT w 3 AGGREGATE - 6 t MAX 4 Q ® KEYED 6'INTO NATURAL" FILTER FABRFABRIC3 MATERIAL EXCAVATED FROM THE CLAY CORE AREA GROUND 4-E""PE 010 G 60 cts LINING AS SPECIFIED BY DESIGN ENGINEERMAY BE USED AS EMBANKMENT MATERIAL IF APPROVED S 1F MIN DEPTH W. UNDERLYING F F 6iBY THE ENGINEER TO CLEAN WASHED GRAVEL PREVENT SUBGRADE SATURATION 4 THE CONTRACTOR SHALL MAKE A DETERMINATION AS TO 1 MINIMUM VVTTM THE SOIL CONDITIONS THAT EXIST AT THE SITE IF 1 1 SIDE SLOPES UNSUITABLE SOILS ARE ENCOUNTERED(CBR OF 4 OR LESS), DATE 12 NOV 21 APRON LENGTH 6' THE CONTRACTOR SHALL UNDERCUT THE EMBANKMENT BASE --- ACC 0' --_-- ----__---., A TOTAL OF 4'BELOW GRADE WITHIN THE TOE OF SLOPES JOB 701674 A 6' NOTE UTILIZE MEASURE AS NECESSARY OR REQUIRED TO PREVENT RE-CONCENTRATION OF RUNOFF FROM AND PLACE SELECT BORROW MATERIAL WPC 202,00063 A DO LA 81l' ADJACENT IMPERVIOUS SURFACES REAP YARDS SHALL BE DIRECTED TO AN APPROVED SWM FACILITY WHEN 5 THE CONTRACTOR SHALL CONSTRUCT THE EARTH DAM EMBANKMENT POSSIBLE CONCENTRATED RUNOFF LEAVING THE REAR YARD TOWARD STEER SLOPES WITHOUT SHEET-FLOW IN ACCOR04NCE WITH VDCT STANDARD SPECIFICATIONS FOR CONSTRUCTION MANAGEMENT CR STORM-WATER MANAGEMENT CONTROLS IS PFCHIEITEC SECTION 303 SI^EET CF - �• MW.W-I gym" SAND FILTER MATERIAL SPECIFICATION I Fr•1eLr Na•. parulr(rawFs-LO.n AmR4 cum ALL !4i•"'a"eRe=M'e(00,n:,•rmnxle N113 doh SWs85pea ye SAND CLEAN SILICA BASED COARSE SAND IAASHTO M-6/ASTM C-33) VA DEO STORMWAT'ER DESIGN SPECIFICATION NO 2 SHEET FLOW TO FILTER OR OPEN SPACE Site Information ® ORGANIC LAYER THE COMPOST SHALL CONFORM TO THE REQUIREMENTS CONTAINED INSTORMWATER DESIGN SPECIFICATION NO 4 (SOIL COMPOST AMENDMENTS; SECTION 5.PHYSICAL FEASIBILITY&DESIGN APPLICATIONS SECTION 6 5 Post-Development Project(Treatment Volume and hods) 5.1 Conserved Open SpaceUNDERDRAIN USE 4 TO 6 INCH PAS NEEDED BASED ON DRAINAGE AREA)RIGID PERFORATED PIPE MEETING ASTM F758 OR ASTM F949 Vv1TH MAXIMUM PERFORATION DIMENSIONS OF IaElaer ILRTW The most common design appltcahons of Conserved Open Space are on sites that are F,T — PEr 3/8 INCH AND A MINIMUM PERFORATION INLET AREA OF 1 76 SQUARE INCHES PERAsrL •sr *01+ LINEAR FOOT OF PIPE UNDERDRAIN PIPE SUPPLIED WITH PRECISION-MACHINEDhydrologically connected to a protected stream buffer, wetland buffer floodplam forestwcawEa••,oR�...l•e.1 «.a„ SLOTS PROVIDES GREATER INTAKE CAPACITY AND SUPERIOR CLOG-RESISTANT conservation area,or other protected lands Conserved open space is an Ideal component of the >qwPa.e'.r,w.m.....a a,.,.,e w.m wn'••�4T.aiwt-.•uwN.Raawr - - DRAINAGE OF FLUIDS AS COMPARED TO STANDARD ROUND-HOLE PERFORATED "outer zone"of a stream holier,such as a Resource Protection Area(as is required m some pans o mP'^•^•'•„^•re.•.a,..."no' u a.Tr I on "'� iPIPE SLOTTED UNDERDRAIN REDUCES ENTRANCE VELOCITY INTO THE PIPE of the state),which normally receives eanotT as sheetfow Care should be taken to locate all p o r.rr..,L•.I rim 1EOWR THEREBY REDUCING THE POSSIBILITY THAT SOLIDS WILL BE CARRIED INTO THE energy dissipaters m flow spreading devices outside of the protected area w F•6,,vy,,,,�.�•eMoaa,®,�,,,e.•oe.,R„`.emoa•,,.ays WA4 SYSTEM SLOT ROWS CAN GENERALLY BE POSITIONED SYMMETRICALLY OROOASYMMETRICALLY AROUND THE PIPE CIRCUMFERENCE DEPENDING UPON THE max toAPPLICATION Designers may apply a runoff reduction credo to any impervious or managed turt cover that is t�r�F IYnMoatF..r hydrologically connected and effectively treated by a protected Conserved Open Space thatA.au.r44•..H II Sobs Va� c� t am FILTER FABRIC FOR USE UNDER THE TURF OR STONE SURFACE COVER OF A SURFACE SAND meets the following eligibility criteria. x tazl4ra r.n.I r..M'..r'wnnNarlia• os ��� '— uS oix r on FILTER AND UNDERGROUND FILTERS AN APPROPRIATE MATERIAL FOR THE r.at LI v.•... SOS a.% f a% APPLICATION BASED ON AASHTO M288-06 FABRIC SHOULD HAVE A FLOW RATE OF> • The goal of establishing Conserved Open Space is to protect a vegetated area contiguous to a Twsu.P.IS T'••^ ^' •+ F.� L125 GPM/50 FT(ASTM D4491)AND AN APPARENT OPENING SIZE(AOS)EQUIVALENTreservingNL..r. .••1t� system,such as a stream or natural channel,for treanna st0rmwator runoff TO A US#70 OR#80 SIEVE IASTM D4751) THE GEOTEXTILE AOS SELECTION ISBASED ON THE PERCENT PASSING THE NO 200 SIEVE IN A SOIL SUBGRADE,USINGEstabnshmg Iwlated Conserved Open Space pt%:kets tin a development site may not achieveFHWA OR AASHTO SELECTION CRITERIA this goal unless they effectively serve to connect the surface mnotT to the receiving system F'aR-0avalimrRent Requirement for Site Area Therefore,a locality may choose to establish goals for minimum acreage to be conserved fin MEMOMMEMMOMMEMMEMEM STONE JACKET FOR UNDERDRAIN terms of total acreage or percentage of the total project site),and the physical location (adjacent to a stream,or other criteria)in order for the cumulative conserved open space to USE CLEAN WASHED GRAVEL THAT MEETS VDOT#57 STONE SPECIFICATIONS OR qualify for the RAM credo THE ASTM EQUIVALENT(1 INCH MAXIMUM) • No major disturbance may occur within the conserved open space during or after LAND COVER SUMMRY--POST DEVELOPMENT construction(t e,no clearing or grading is allowed except temporan'disturbances associated La.Care,soma neamenratone and na,,•.t Loa. SAND FILTRATION CONSTRUCTION SEQUENCE with incidental utility construction. restoration operations,or management of nmsance vegetation) The Conserved Open Space area shall not be stnpped of topsoil Some light Fm•.vcr,e..se.,.m.«;a..,.1 - 0010 T^w.+u rwso I 1Im FOLLOWING IS flit 1'YPICAI CONSiRUC110N SLOT/FNCE To PROPERLY INSTAL I A STRi1L TI 7GLL Sgrading may be needed at the boundary using tracked vehicles to prevent compaction fORMW ATEk Ell IHIP,SE(QU SEQUENCE LAN BF MODIll1'D To tEF•7 EC7 DIEDIRINT Elt.IY.R DESIGNS SITE • The limits of disturbance should be clearly shown on all construction drawings and protected rla.4nlee Re lame: am Treatment Volum pa,Ime ix. I CONDITIONS ANT) THY SIZE. L(tMPLFXITY AM) cONFIGilR4 noN OF THE PROPOSED FIT TERING by acceptablestgnage and erosion control measures %Emit IRS T•'ad RwI' nD AIYI IL Ant iN • A long term vegetation management plan must be prepared to maintain the Conserved Open STEP I.LSE OF FII TERING PRACTICES AS 4N ERA CONTROL.THE FUrIREICATION OF A I71 TERING Space in a natural vegetative condition Generally.Conserved Open Space management PRACTICE MAY BE USED AS fill SI ll'or-11CA•Dti)RARY SEDIMENT OR TRAY DURING SI TL plans do not encourage or even allow any active management.However.a specific plan illiiiiiiiiiill® CONSTRUCTION AS LUNG AS DESIGN EL.EV ATIONS ARE SET Kl Ell FTHAT. CLEANOID AND CON should be developed to manage the unintended consequences of passive recreation,control VT.RSION IN MINT) 'DIE BOTTOM ELEVATION OF THE MITERING PRACTICE SHOULD BEim'astvc species,provide for tree and understory maintenance,etc Managed turf is not LOWER THAN TH1 BI1TRlhi El EN,ATtN OF THI TEMPORARY SYDIktNT BASIN APPROPRIATE considered an acceptable form of vegetative management.and only the passive recreation PRtx'EDI,RFS SHUUL ll III IM'11'M NTEU TO PREVENT DISCHARGE uF RRH711 WATERS WHEN should of dedicated parkland are eligible for the practice leg..the actively used portions of r11,0..•1 ass THE!TMI)RAR).BASIN IS CONY,ER I'll)TOA Ill CIRINO PRACTICE ball fields and golf courses arc not ellgi hie l.although conservation areas can be ideal z x....a.P 136 STEPS STABILIZE DRAINAGE AREA Ell.TERING PRACTICES SHOOT D[INI 1 BF CONSTRUCTED Ok treatment practices at the edges attar(-intensive land uses E-w w - .— --------- OPENED TO RUNOFF AFTER THE LONTKIHI'nNG DRAINAGE AREA Tel THE F ACILITS IS • The Conserved Open Space must be protected by a perpetual casement or deed restriction c Sde"""6.0.1 as. Cl1MPI ETEI.Y STARII I/PJL So SFDIMFNT FROM THE CDA DOES Mir FLOW INTO AND CI t N,nB' that assigns the responsible pan) to ensure that no future development disturbance.or -- G TotTote. •a FILTER IF THE PROPOSED HT.TIRING ART A IS USED AS A ST DIMENT TRH'0R BASIN'TIRING 1 HE clearing may occur within the area W U iT 8 CONSTRItCTtOTn PHASE 711E CONSIRUC TION NOTES SHOULD CIE ARI I SPECIFY l ILA1 AFTER • The practice does noI apply,o lunsdlcuonal wetlands that are sensitive to uareased inputs of F Z Site Results(Water QualityCompliance) SI CONSIRUC TIOh IS LOMYLETE,TM SEDIMENT CONTROL F.ACILITS IS TO BE DEW 1TERFD, • stomiwater runoffand fens). O z 5 Pl' 1 g.. o Q UREIX,FU AND REGRADED i0 DESIGN DIMENSIONS FOR THE 1'(1Si-CONSTRULTIUN E71'R'It U U Area Cheeks oa.A DAD DAr DAD DAI I PRA OEOI r'C' w w tin/OPEN SPACE(act om Om DOD 000 000 I_ O1. STEP 3 INSTAL;E&S[WORMS FOR THE EH TERING PRACTICE STORMWATER SHOULD BL DIVERTEDIMPERVIOUS a d OVER NO 533 125 4.46 203 4.96 - OK AROUND FILTERING PRACTICIS AS Illl'l ARF BEING CONSTRUCTED THIS IS USUALLY NIl o ow "----_-_--- - ---__ _--- _-_---_---' llIPF7C1 1 f f0 ACCOMPLISH FOR OFT-LINE 1'IL'l l'RING PRACTICES 111S'LX'TRI:MI Y IbiPOk 1 AN �N.Eava NAGGED nuns AREA (ash 533 MI 4.45 209 496 OK__- S MANAGED roar Ata tact 3s3 tot 4As zits Asa OL 70 RELY RL MOFl AND IiRODi I)SEDIMENTS AWAY FROM 1111 III TER TIiROU(:110In '1'HT �� MANAGE,TURF ctA TREATED Ia:) 363 LW 495 209 a.% OA CONSTRUCTION PROCESS SII T l'ENLL OR OTHER SI"DMMEN]v ON lROI.S SHOULD Bt.INS I ALLTD - -- - -- AREACHECK oa Oa. OIL o1 ox. AROUND THE PE,RIkf-rot,or THE FIT TEE AND EROSION CONTROL FABRIC MAY BE IvTFDED DI RING LONSTRITC1111N ON EXIT ISI-D VD}-SI UFTs WITH GRADIENTS EXCPFDINL, 4H IV m P s` s J EXP(/SI 1)St111 SIN THE VICINITY ill TIII III.TERING PRACTICE SHOULD III•RAPID;I SI NMI I/.L7) Site Treatment Volume f[ ( ) BY JIM/R(/-5I'FIF SOD. M1)I CH OR 111'111R I.0CALL1 Y N'PRtl1 FI) k9-fHt)U 01 S111I. ...JAM I/A IIt/N w Runoff Reduction Volume and TP By Drainage Area DAA DA• DAc DAD DAD TOT. I STEP4 ASSEMBLE CONSTRUCTION MATERIALS UN-SITE MAKE SIRE f11EY MITT DESIGN o RUNOFF REDUCTION VOLUME ACHIEVED I5'1 0 O 0 0 0 - 0 SPF(.IFICATIONS AND PRLPAKI ANY STAGING AKL AN 11,LOAD AVAILABLE FOR AL 1t0/el face 317 it8 sag i•Df 4636 STEPS EXC.A 19TE•GRADE DISTIL THI APPROPRIATE DESIGN Ur V'OIONS ARE ACHIEVED FOR 1111 `N TP LOAD ono yourt ACHIEVED PIE/el SA 1a0 oat LW r.•a VISE O I/Ol"i0M AND SIDE SI OYES Of I1I1 F71 fERINC,PRACTICE Z TP LOAD REMAINING lro/v*) 4.50 iT/ 4.69 2XI 511 17S NITROGEN loan REDUCTION ACHIEVED IIE/MIL aLal I 6A ) zs.m ) iLrs STEP 6 INSTALL THE FILTER STRUCTURE AND CHICK Al.I DESIGN El VA I IONS I,1, CON(REIT' I vas I mu) WWI TPIPI Cl'T+tut HOLES BOTl'/IM UT EXCAVATION FORSIRI ACEFII'IRS I-IC' SUGGESTED ANNUAL MAINTENANCE ACTIVITIES FOR FILTERING ...v.0n Op„ Total Phosphorus STEP 7 ENSURE WATERTIGHT STORAGE AND FILTER.STRL'CTURE.UPON C'OMPI E T1ON OE 111F nl T:k PRACTICES i c• ,/ F VELOPMtsr rn Inae Pro/Eel 3013 snort:I'RF MlfI I. THE INLETS AND Olen TTS Sit/ULD BE TEMPT/RARE 1 PLUGGED ANT)tilt TP LOAD REDUtnan REQUIRED(m/w) ISM STRUCTURE Ell LED Wilit WA'Tlk Ill THE BRIM TO DEMONSTRATE WATERTIGHT-NT SS R1'611 AR 1NSPEC PIONS ARE CR1I1r Al fU SCI{EI)t'I I,IMFNT RLMOVN OPERA IIUNS REP;ALE TR Loa ACHIEVED IIE/el S34! MAXIM;Ill Al 1111VABLE 1 T ARAM-IS',A,Of flit WATER VOLUME IN A 24-loll'R PERIOD 11 THI. III 11'R MEDIA A1s'I)RELIEVE ANY SUKFALI CI.(%,,,INI I'X)1)I'ETT INSPECTIONS ARP I:.SYFLIAI I.Y C / rD LOAD REMAINING MATT 5034 SIRUCIIRL 1A11 S THE TEST REPAIRS MUST Bl PERFORMED It) MAKE THE SI'RI'C TITRE N)I111 D FOR UNDERGROUND AND PERIMETER TII11,1/S SINCE AN ORGANIC MAT CAN(1'ilhI Y C1 IX) Christopher C Wagon o TH1 Elr Tl•K SUKEACI DEPENDING ON THE I EVE]OE TRAFFIC OR T1{1 P'.ARTICli Alt LAND 1'SE A FlI TER RtMnaxNG iP win REDUCTION RFDUMFOIN/wl' 16.33 WATERTIGHT BFYUR] WYE7L ITR MEDIA IS PI TNTUII' omen SYNTIM MAY BECOME CI OGLE l KIIIII.' A II W MONTHS UE NORMAL RAIN;ALL I'RPVI7 NI C5,1222 is Total Nitrogen(For Information Purposes) .STEPa'INSTAL;UNDERDRAIN,ANDGRAIEI AND CHOICER STONE LAYERS. MAINTENANCE CAN Ql'ICK'7 ESIABI ASH A ROL'I1NE FREO,FNCY ACCLIMAIFI)Ti) 1111•LAND 1%SE 4LV03,1 ORAL C* Pool DtvuoamENr moo(1EM11 56682 MAINiENANW.INSPECTIONS SHU1n I)BF LON7)1/L 11.1)WITHIN 24 HOURS F'ol 1 OWING A STORM THAI NITROGEN LOAD REDUCTION ACHIEVEDIIEIvr/I 106.41 STEPS .SPREAD FlI TER MEDI4 ACROSS THE FILTER BEI)Ito I /OA)T 1IF-IS UP It)'um DESIGN EXCEEDS if:INCH 01 RAISII'Al,I IN ORDER TO ET,Al CA fE nit.COS'DIIiON ANDPL:RH/RMANCI 01 1111 REMAINING Po51-at01LDPMtsT NITROGEN LOAD IIE/0)1 46oA1 ELI.VA7'ION BAC kIllIL S UK OOHFR I(p11PMI:NI SI llIlY D DLI IVl,K TILL MEDIA I RUM OUT SIDI Ill TERING PRACTICE,;NCI MINL,CHECKING FOR 111E FOl LOWING TH1 Ell TFK 51501,TURF NAM)S11ITII 11131 MANI!A1 I Y RAKED •CIIECk 10 NEE IF SF'D1k11NT ALLI'MITI A TON IN RUE SEDIMENT AT(ON L11 AMBER II AS T XCFTDtlD E STEP ILL CONSOLIDATE THE FII TER MEDIA TIII THI SI DIMENTATION.AND Ill TER MEDIA CICAMBER INCHES IF Tat SLHFDI7 I A CI I ANOMT Z - - - - W11T1 CLI,AN WA 1 ER AND.LLI OW [G DRAIN II YOR11111CA111 CIIM'AC I LNG 1I1F SAND •CHECK DI I SEE IF INT El S AND Eli W S1'I!TIERS ARE CI EAR III DEBRIS AND ART OPERATING O LEVEL SPREADER&GR4 LEL DIAPHRAGMS: I Avl•RS 11 Rn l THE DEPTH OF I B TER MIIA MT n T III UrsIGN buMMR l •LII,K 1 Y LLJ 1•R,, I I{I DRY S}DIMEN7 C ILVvR31 R AM)SAND 111TER BID FORANY k1ID}Ntk U}S7 AMINO CD I— STEP II SURFACE FILTERS-INST4I L THE PERME4RI£FII TER FABRIC III SPICIER I),OVER THEW ATI R OR IONDING MORI THAN 45 HOURS Al n'k A S I'IIRM AND I AKA'Ni.ESS ARI C I1kk1.0 TIVI W SAND ADP)A a-1NCII l0l'SI111 I AY}.K W77'll P}•A CRAW I INI EIS DIAPHRAGMS LOCATED WITH A,TIIIN TO R1S'f(1RE FERMI Mill ITN.A D BRIOELDIAPHRAGM EllIIE11 THE PO I.OI 1111XISI OH ISIA l7RLD 1 ORBUIIIC0NS1RV1D01'C ATII) ♦LAKE, AND IMMID1:Afl 1 YSTIn Klf}I VII PERM ANTI NI Gk ASs VI LIEN 1111 I.RASS SI301'I.T) •DIG ASMAI 117-STT'IT IN MI SAND III TER BTU T.t DETERMNI\\111.1111R TM EIRs f 1 INLIB S O1' la- BY 7 GI TA Ill11R STRIP,1WIDI A11I-I io-1 Slit I II LOW 1Ill RI ,oN11DIAPHRAGM1SCBI',\fFDsl• NAND ARE NIMBI 1'Dix01 IWI I)ANT)ME I)RI PI AL 1 MINI f� INC1' A I'll) III, I l k 'I W'IUf AND I-I I'tI DII'1'Il<I NC l l I11.11 RITN ON 711E SAAIl t II 51 k A l I111 PI W A 11,Ki i1 .AND I'll 1'ACII III)IN lot I O NOT kl.sW71'C1IED ON-1 P.1 1'N"I'B A 1'IG0K01TS lot' OI rin PER s1RIP 1111 DIAPHRAGM SEEMS IKo 'ARIAN, 1IRs1 II AC Is - A oh As,L,Iv 11t 11A\MT,,M'1'NT AM 1s111'D •INSPI CI'Will 1111.R1111•CONIRIBUTING Dfi AP,AGI ARIA it Ilia I II DR Is SLAIII 1 AND N01A J Z 1'hiI1y)\OM'NI DI\IL1 M111.1N1.01 I STIIk1ISf PAR I IL i.1'S BF 1(1kF IIIII RI AL 1, 1H1 PR,,c IICI W1TRt)0IMDIW NI 's �y srlt)ND If 1L'1s AN.1 T E41J NI'ki,\DI k S'AINI'AININI.N/I111 ET ON As kl-NO11 Fl ON,MIN 1111 STEP)/ I'VD£RGR(IC ND FOTERS IX'',) lib PI T,AII'El I I\BRIL .\N0 I'ilT- AS1 R 1,1 I'l A •L71I Ck WI11'II II k T I I ON I111-I1l II'R )I).\ND111'1I I.It 1s\1,n2I ill I=INI III 51111,11 ANY) W L.R,\\I I B\.I,\s),II M'ICII11 Il..I St III 1911'N1L)SNAO MI 1\\IN (ilk 10 IN, •111 IIRSiklf'IG:IIR IO FIOI RE 22. 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D 0 0 BASINS CREST WE PAWBNRI,L1' uENN�nnn 4.TRUST SPA1E/ UST 3n3,1/0"f SPUMY - 11..MMMMME') ANI,txpooEK N TOP ,<J{yp y{ O O DESIGN NIGH WATER '��; TRMMMtM MP' r OR APPRO,EO EOUAI PIATEW To rwuE 1 R ANcwx nns/ a y- id 2 I25-YEt STORM ELEV.) ILA 1 / T t]' RCP N6FRTOP IS AY ��/�M l '�G'Sa' J() ro�T To xcP ns[e 111111111;1111111111 RTSL OPSSURE EUEF 10*15 M°AT[DOCOMPACTED MATERIALAA(iI E.)�i/Cvi•uts/6'*e10011N BEPREOMMIEED.0 OF E DS OF2WPRGO[AGMM,F AS RECOMMENDED \r/ (e)3/e'WAWnERsOPENUWHENNTHER OP IS FULLY al 2 2 w N O O rerRrc pRL6WfAn CREm BY GEOTECHNICAL ENGINEER d PLAN VIEW ATTACHED ES Q Fr to a RI M POATETITSENE CAR BT C./K 'j OEVIy—•DRI SrORKE B UPPER ANCHOR TAMSORROW S RtttD ATTKWu[u1�AROUND = ¢Z y>R= 67 CT./K. SEE NOE 3 1 F/YI Fn 510 • t2 LOWER A,A'RCn TABS � METAL PIPE O FABRICATED ED CORRUGATED ZO 2 Q Q STEEL PLATE ' 5 O W Fe'O II --_ �- SEE NOTE 1 �i�' `, K'.4 w C7 tgZ 2 S 4-4 6 AS $FpYE SEE NOTE 2 ^ y u X'¢a 1111 PERFGMTED PpLYET1MENE' O�R`r ('RKTFR S ORN. AE�011mCDl VARIES LEENT CONCRETE t 5 SNOBS 51FII*IOU NOTFR b'Q DRNRMGE TIIBINC,DW!ER SrpRK[ .111 TO J.C.Y./KM) BJFILL x e °c fxOiCN GL uaL� K w' 1 THE CYLINDER MUST BE (� Q N = ■ � vAPPENgit S.tGLLCUUnONS M INCREASE ST(XVIII BY _R �90L11dGERt%eiS/<-YeoL,$) U w� o FIRMLY FASTENED TO THE I I\\ SVp'\'\C<\\<\\\1�\"\`�% y FOR EACH 5 TOP OF THE RISER DESIGN ELEVATIONS WITH �< MN G FEET OVER 10 2 SUPPORT BARS ARE WElDEO -FERNco-STYLE•carnLRA: swi-r ADE EMERGENCY SPILLWAY COMPACTED Jai. '2* OF COAT (zjislt_5F%i o' TO THE TOP OF THE RISER SUBBASE .� SrFFL AwM OR ATTACED BY STRAPS pE•.TERNO ORFICE 12• .•.:. .' '' ;•.. M.MP R BOLTED TOOP Oi RISER O SCHEOu,F 40 srEEl STUB 1-F00T MINIMUM. DESIGN HIGH WATER I G RCP Rlsn-1 ��� \ w\fir �Tt - OIX VANS(SEE GLCUUTpN6 N (2W-M STOMA ELEV j CORRUGATED,FIAT RHII APPENDIX SECTION A—A ISOMETRIC PPENq%J 14-A) YNI Z' 0' COMPACTED GRAVEL PPP OS "" 11 -" OPTIONAL—TEMPORARY ANTI—VORTEX DEVICE di LpYPACIED SUBGRADE • 4)CY/K _ DNY•/AC. ' Notes -__ SNOB CREST NOTE:WITH CONCRETE RISER,USE PVC SCHEDULE 40 STUB 1 PROVIDE'V KNOCKOUTS FOR PPES MTN 2'LMAX LP FOR DEWATERING ORIFICE .Bv7ErC v./SI RAG�� I. O AT RIND CLEARANCE TO OUTSIDE OF PIPE MORTAR ALL PIPE ���, CONNECTION )111SEALANT BETWEEN PRECAST SECTIONS SHALL BE S PYRAMID STRUCTURES (STANDARD SIZES) DRAINAGE TUBING SHALL COMPLY WITH ASiM IR f667 SEDMENr CLVND PA ME 2 JOINT SMNE PREFORMED BUTn RUBBER DIMENSIONS IN INCHES TO THE NEAREST 1/4• AND AASNTO M294 3 INSTALL LOW FLOW ORIFD AS SPEORED FOR EACH RISER DESIGN ELEVATIONS WITHOUT •AS DISTRIBUTED BY CONTECX ° UPON CONVERSION TO PERMANENT RISER INSTALL TRASH-RACK CONSTRUCTOR PRODUCTS NATIONALLY* EMERGENCY SPILLWAY Typical Pond Riser Detail I/Of HOST STRUCTURE INSIDE DIMENSIONS (RISER PASSES 25-YR.EVENT) , N T S / % PART NUMBER SOURCE.VA DSWC PLATE 314-15 SOURCE'VA.DMPLATE.3.14-2 --- TYPE OF PIPE MOUNTING TO' PP-I N0 PROJECTION OF PIPE ABOVE GROUND LINE J']I INSIDE DIAMIER OF PIPE _ JL-J z v m NOTE' DEWATERING ORIFICE MANHOLE'S LESS THAN 2V °° TOP p1 Fa °F l Li' 1 / fi r . SILL,., dbbr /- �^.� � �s - -,-— v;G C ORIFICE FLEXIBLE—INVERT • BASIN# DRAM (IN) TUBE(IN) (FT) Co*I ' ~'`ix= s.o e o a68.65 a \ II. o'o 30 60 c 3 3.5 60 d1186 AI. /De� �X. v'•1 Mcleod q IX % um.° Mn,/m %H���i H//%\ . CP m _ 1 JI�, W 111111 BELL END ON ntvnw \ \ Jt, IDOID PIPES 4 5.0 80 37103 ,o to jm.,mm 1 n<M'nq I ° 1 __ ._.. __ -- .. S 2•-1= PYRAMID RACKS FOR CONCRETE PIPE PLAIN END ON NORMAL[EARTH FOOUNDATION Me. I 0.1*10 Q E++ SJTGOID PIPES o FOL Paee FO ON' SOFT. YIELDING CR r PART NO PIPE 1.0' PIPE OD' A' B• C - rY1+ > YO �,,,1 ,,,,« °i ROCK FOUNDATION OTHERWISE UNSUITAB_E MATERIAL ' I N. 2'CLEARANCE<HAXJ .ne.e -w r q PYD-24 24 30 JS 3 12 1 15 3/4 m Q g I §d YS - SEALANT P1D-36 36 44 43 12 in 19 1 4 Q 1LR+E' PIPE PROJECTION ABOVE GROUND LINE Pro-SIB 48 58 57 121 2 201 4 III r A e 5 1 I�� FLEXIBLE JOINT ra of c. - <p or w c NI-p. PYD-60 60 72 66 1/2 12 1/2 20 1 2 __ _ _ R. r 1 �, ti �� PTO-72 72 86 84 1� 27 1 2 a'-1" ,�' 4 DF LARGEST I 1 1 P,D-84 BSI 100 96 1/2 13 32 1/2 w Rj I ,� PIPE x _______ _ PYD-96 98 114 113 23 39 1/2 PYRAMID RACKS FOR PLASACivMETAL PIPE ¢w r / n O � �• 1A'M';"c D u'm c"' PART NO CORRUGATED •HOPE A' r_B" C 8 �` eL — ... PYDP-24 12.15.18 12.15,18 33 1/2 18 21 1/4 U - m •a./�--01 J 7).I.J. I SUPPORT PIPE CN 4 — PYDP-36 21.24.27.30 24.30 43 18 24 3/4 Z n �' 4•OF*57 STIRS .,:(F 1 .� - MIN BY OF R57 BEDDING r%W ?/ //�/ P1DP--60 48.542 36.4248 6851/2 18 2526 4 EXTENDED HGALITNIC STONE BEDDING 4\\ \ 1./''r \ O/b r 'II b HASE<DIA-2 X KM.DIA) M D Qr E L(T /.���� on« 9 , j/%' / PYDP-72 6066 60 84 23 1/2 33 )61TF� STONE BEDDING SHALL EXTEND TO ^ •1° +'1/1C �.\\"NFU''' bona a P•RIP-84 72,78 N/A 941/2 23 1/2 35 KyTN Of THE OUTER BOUNDARY ALL 1 ^ Y�o-ns M"t/ r a• J ), NpTE,BENCH SHALL HE CONCRETE INOISTU2HED AREAS SURR0.RRDING 'or mm Be°dnq Nam.• 25^'m ,N/1 • 1 Mole.. ..r q � ,(NOB PYDP-96 8{,90,98 N/A 113 28 1 2 45 ?4 '.4,d' THE MANXRE oo.SOD SEE SUB RISER DETAILS sac mm uaa CBSP AtEf'IH DATE. S`, 2 I NORMAL EARTH FOUNDATION 4* ROCK FOUNDATION FOUNDATION SOFT YIELDING, OR 'i TRASH RACK - Monhole Riser Detailtft w.".R. «o.aa OTHERWISE UNSUITABLE MATERIAL °ase Pv .a BY: C ' •1/21 -qG to PO meTre PROIECf: N T 5 A-8 mm PN over NMe CE P tP Wow A«.<r�.) n1e;} ' & ANTI—VORTEX DEVICEDETAIL Christopher C Mulligan a W. [ wC mm 0i ..d,<Nee - L 03,672 Method,•P.e05/1222 4` 60" PRECAST MANHOLE [co- or t wn, cave oml of 9m,°..1. 444,eNALES` Y ,ante vooe VA DEC STORMWATER DESIGN SPECIFICATION NO 12 FILTERING PRACTICES �.,<m.r,.�en t sro'-R,u oecN°atu. %�Oi-B.e,-.q mote,. r croon[.[Moat sect.-302 m(be Reno one Br.2.SPecir.m.n. • R.Pl0E -Bx%M mote. 0'occo.aon<..,tn Sect..302 o..n.Rood one Budge SPc,TAOIAns I When...e..R..or ewal 9T metre _C0°a°trnent TRASH RACK & (No Project..or pipe move prop. w.) ANTI-VORTEX DEVICE Sheet J NSTALLATION OF PIPE CULVERTS AND STCRM SEWERS REEERENcr Inflow W PIPE BEDDING — METHOD "A" 302 Bypass • M H STEPS 1 10T OPEE55 OT.KR000 N01ED. I M1DMIA DESARTMENT OF TRANWPGRATION _c. ON THIS SREEi ARE In M'L IwEiERS`Fh J {TYP Flow Sputter Q Perforated ++ I— a 2 7 o- ` . ...z ' oR . .. "EI- ,e%.e,<.-.e+W.PWr,rm �"- ' -, Standpipe Underdrain l— 0 i 48" D. - RISER AS REOU'REC A M ' I ,x•l•a'. r. ne<,m BUM . Pretreatment ,- — Z CC w •^ q- Collection System g_ 0 p/1 t y Fitter Bed Q ' m: I '° �c I. I • 1 .5,.... ..SIP Tc r� .. . , LI r.. i s. _:� High Flew �� M_,ICI / - r ''' _ . - w^Ts YL° , "tip—= 1, Bypass Foreba y-- _ C Eo . o e z _a 1 Igo n R "'1 l :�r� :>;r J _ CL L . IK .o.n PUN n. w �� � `'7? q'7J -.-...... ....:::;-'2;.,-..�qc U) 0 e EC'72'64• ANC SE' 1` A � Gv�--�� �''"�" •rQ'.� `i \�J Outflow > IIOD —at - Inv . qq ie COLLAR OET#1 R, .'°oro""Ef r•��•^Y'M I ' - -1- O `V BC t v Y x r a t r c v " -- L ,rfr- R 5 Cre., ti0.�1'�3G�Ii A K 5 - - ce,�"wa. vc ewn P..a e_orva �.e51? An .. I7Z D P OETK B _Y LEn o m o-srs A 'efva OETK A 2..' ryy,,�� "«r, k. S _ ( 0 Q rID SEVER PIPE e CC _ I 'T I '°m� K>"�•-' ' „t'-11R„^e - Q CO I�!IgIRI'''I'I'1 ae.. le-eiooD W3o.noe - oPao%+eo m A y \ / - - F /�=•. ••L.:^$+ ��"""""""" �� T •rr1..,• ?... ,e-Saab ' AIaS*62,Tp. L��o _: `. :- N EE'1 �>.•.. . t ggCVD���OC��U�t a< ��S.ww�FF, .> DBE Bottum 6'NIN ' r e .y .. .. l��Ip1��pOpo���9p�OpEp ' :u'T3ir.e�i - p T" +rst -rii +E - eM-r I N c III I p pp w 7 n / Mow a.r =x 3 31..'1_�H4U11Yyl141J111��-3yi <o.R�: :..^e: .eAer-' «)° ««'ed«egg« OVE A CH J o SECTOR A A ''-I I•-4 4- L OOMUETE OVARIES FOR LIT.OFP11. y raw'f s,n'^•v'�$,i u B. 6•PMaralca MENDED MONOLITNIc Rs7 STONE BEDDING g BENCH MAT BE _ a ° a w ^ Peoen .- y".�� c Pl-64,1n v61ys iii ATE 12 NOV21 BASE OPTIONAL 6Ri�v AND MOR AR 1 a n'.�r dR ai:. .o7 44,7" LR1oRrCFaln syRtgm SCALE AS SHOWN •C _ SECTCN C-c SECTS A OA JOB PO 1674 OR�3DDDA' CONCRf-E R,Xe - B ,.,O, g,�iz,...,,, GRATE OFTK WPO 202100063 NET, WHERE S-JPS ARE PROV DED FOP FUTURE r1f °P 1"" . STANDARD DROP INLET Figure 12.1. Schematic of a Surface Sand Filter CONNECTON BENCH SHALL BE SO FORMED. q, „,q ,. der-24er PPE MAXIMUM DEPTH 01)-»' �� '-SET 19 cF _ 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 1 x17 copy of a site plan on which all of the following activit) locations are clearlymarked. Keep this plan up-to-date with ongoing site changes and inspections.) Issued— 10/2014 Stormwater Pollution Prevention Plan(SWPPP)Albemarle County i 1 1 IIIIIIIII111111I11 11,11IIIII IIIIIIIOIIIImnplll„„„, IIIIIIIIIII„„,„,I 4111 II (III,, i _ Il llll II IIIIIIIIIIOIIplp ll' Illllllllllllllllllllllp ainulinnl 1 minlni0lnuilnp 4iVlp I • II IIOIIpIil011 I IIIIIII IIIIIIII Illlllllll II IIIIIIIIIIIIpIl10lllll Illlllllllllplll l 1111..1,pll I II IIIIIIIIIIppIl11 1III _ 3,dill, 1III6 IIIIIIII 1I111�rE IIIu1I mlllllllllnllltllll.dll I IIIb nlllllllalllmllllllol w IIIIIIIIIII011111111 8 H o� SWPP PLAN °z, !.„, c n U C Q N j Q N =2 �QQ WPO#2021 00063 0V_ °5g9 - 1V" z. TM 62-16A Q_ M Q V V RIO MAGISTERIAL DISTRICT, COUNTY OF ALBEMARLE, VA Pa SITE DATA - \\ OWNER EL 8 ANN P PHIWPS 1 a PHIUPS WING TRUST " J ETAL C/O CAROLINE MOLINA-RAY \ 6704 MENCHA;A ROAD UNIT 33 / AUSTIN TX 78745 DEVELOPER SOUTHERN DEVELOPMENT HOMES J,� / // . 142 SOUTH PANTOPS DRIVE ' N CHARLOTTESVILLE VA 22911 / POPS PLAN PREPARER 999 SECOND STREET F&ASSOCIATES 2Oa \/ 999 SECOND STREET P CHARLOTTESVILLE VA 22902 / - ?' --� (434)-977-0205 ".. ik z TAX MAP PARCEL No 06200-00-00-016A0 BELVEDERE PHASE a / TGTAL PARCEL AREA 80 77 AC(PORTION OF TMP 62-16A) ��'<Q�, ZONING R4 RESIDENTIAL ( -�0 ,e BELVEDERE' Z PHASE Sheet List Table o,�,�, CURRENT USE 2 EXISTING SINGLE FAMILY DETACHED(SRI)HOMES 01 I � Sheet Number Sheet Title j 1 COVER SHEET N Q G R4 STANDARD DENSITY 4 DU/AC ,\ �� .... , SITE k 2 POLLUTION PREVENTION PLAN-PHASE I o 8 E ALLOWABLE DENSITY 4 DU/AC,10%DENSITY BONUS CREDIT FOR MAINTENANCE OF IXL�71NG WOGDED AREA'4'10%; k LOCATION I 1 3 POLLUTION PREVENTION PLAN-PHASE II i 2- 30%DENSITY BONUS CREDIT FOR AFFORDABLE HOUSING(4'30%)-DENSITY BONUS CREDIT FOR - O o 0 DEVELOPMENT STANDARDS(4'0 26 ACRES)-6.0 DU/AC MAXIMUM 4 POLLUTION PREVENTION PLAN NOTES&DETAILS UQ "—.,,�`"" TOTAL SHEETS=04 a a • iy,�!' 2�P/ wow P"` . PPS S 1 r e ,-.,) v ,- 1 N a • ` S o / I 1 5 ^�TX Op L StCT'�1 OZ Christopher C Mull9on D t Si127s 44 o/12.e2eo.�� McL E VICINITY MAP SCALE:1"=1000 FEET I—U 0Z gg Z 0 I_ — I— w > w Qw CC aw 00 o J Z J Do d 0 ,,TF NOV 12 2021 SCALE. AS SHOWN JOB 20.1674 WPO 2021000E3 SHEET 1 OF 4 \''''''4:‘ ri ,, ,„ , \\;:\---\\\\ '''' - - ... _ . . `t _ L - _ 'w t I:r _ .,..., -.4 .......'4t'' f4k ' ' '---- '"-- ........-.. r'\,,,,,\\\ ., 'I • 1 \ � , i •1 _ , N i N. 1 v t t 1 t 1 0 (�� qq v ,, / ♦ I I tt -Zc, x 1 i - / 1 ♦ 1 tt mz. N (\FL T 1 r / t t m / '....- - 41111p\‘ • . Ole 11 t_/I 4;4 ....... "•,-, , ..• .14„,„ I I di I ..0 ,,,,, 7."--,'-'\ / ., ......,03 ,fri C)Q9' b s'-, ;it. • .,, mar r ,, nT,s, ..,„,,, .. i'.'-' A .11§3.' .'7'f,81 .'*) I ;'1 $7' 1 v s N~i�om 1 t '4fl�� �, - c�i'�1'`t'i om G' t t 1 R x0f 1 D D O O \-, . NkIF% • -_--.'--.._,.--,-,.-„=..::-1\.--;-,.1,,---:--'-,,- a >' 1 1 , ♦ / , ��� 1 t`T N �.%• ♦ �. ^,-4,,,,.... ; #1, - - ,. e„ 1 0 . ,... , , . , 8, v-I."... *, rilli". 'r-- -'‘ .., -, . . , , ,.., „, , , , CO t Ta a,, •,, - /,. I , rn { \ . . \ • ii 0 o J = , 0 N CO o CO W O O m r , O REVISIONS 7 7�♦D �] ^♦ ASSOC., M INC.m ,3 c r _ V4oy NO DATE BYI DESCRIPTION ROUDABUSH•GALE&ASS C.,INC D U N LO RA VILLAGE a o° f„ -- 04,224'022 A RAASED PER COUNTY COMMENTS 4� A PROFESSIONAL CORPORATION , a,:z 8F i 5., -2- 051.2,2022 RfA REVISED PER COUNTY COMMENTS SERVING VIRGINIA SINCE CORPORATION (V s n ` POLLUTION PREVENTION PLAN = H - -_ - - �^��'8€ n i - 999 SECONDAGIN SE _ _ CHARLOTTESVILLE VA 22902 r POLLUTION PREVENTION PLAN-PHASE I X= tlIH` ARLOTT UDABUS COM 229 I ,,,,,\".4\ A . , , - 4 I .- „,. Oil I(N \i; N, 4t.' 1 i(), \\„ ,- , \ . ''' - -‘7,- - 1__ , 1 , 2 :,..'„, •er.:--1. k •••. i i1 , / 1 i 1 \, ‘„ ,-,,- �1\ E Jaitij n A x .,•- "" \i 'Io i — J- - ! -fi o mg \ r r s tI11-g`�,Nr) g . ; / t • „FCy/Pp o\ . I C� mg �p,• , ( : f /ink,: _ I r - ,\ - \\\:___,* 9 r p n J \- A(‘\\\\ —/ -- "•.....• rn,wad tiF.��mp • • ./2 ,,. , ,--:+.'.71111110111,-- 7' 1 ,_, Zz, f a fo• \ S : I -- ,_ , 1 , -1 ' 9:''',,c' ' ) j—.. '''gr 1 1- s —. , : ' ' t ][I 0) 1 l ,,,.., 4(c"- fl Is \ •.... ... .. ,,,./". x , • ,: \‘\\' --"-e_ ' li / 4 is Y) / , , I 1 / 1,: : -I I t..• , I, ,:-..47,_,.;0 / A• i , J ti, /\N.- / t ., \ _s"it A A\ 7 . tt n o o tnz orl 0 0 T my om, 00 _ m C ny o f? r3 0 oa yz o 0 z9 m 0 o ---, REVISIONS m 8 m;> a n k'n NO DATE BY DESCRIPTION o a�m D U N LO RA VILLAGE v E ®RovnAaysHE GALE RP RATION ,INC. +E. 1 04,22.,20221 RGA 1 REVISED PER COUNTY COMMENTS A PROFESSIONAL CORPORATION z 2 05,1222022 RGA REVISED PER COUNTY COMMENTS -. SERVING VIRGINIA SINCE 1956 CA) i a g;, POLLUTION PREVENTION PLAN 'Rl��" ^ SECpNDST SE o CHARLOTTESVILLE VA 22902 T f c�. 04. PHONE 434-977-0205 POLLUTION PREVENTION PLAN-PHASE II .3 WWWROUDABUSH COM NOTES: 1 I CONCRETE TRUCKS WILL ONLY WASH OUT DISCHARGE SURPLUS STAPLES CONCRETE OR DRUM WASH WATER AT APPROVED LOCATIONS IN LATH AND FLAGGING (2 PER BALED ACCORDANCE WITH FEDERAL STATE AND LOCAL REGULATIONS ALL 10 MIL PLASTIC UNING STRAW BALE(TYR) SANDBAG ON 3 SIDES CONCRETE AND CONCRETE WASHOUT SLURRIES FROM THE CONCRETE SANDBAG CA zz'C t0 MIL PLASTIC LINING MIXER TRUCKS AND CHUTES WILL BE DISCHARGED INTO THE WASHOUT ¢$ NATIVE MATERIAL(OPT) AREA OR HAULED OFF-SITE FOR DISPOSAL SMALLER EQUIPMENT SUCH AS 10 MIL PLASTIC UNING os g WOOD OR METAL STAKES WHEELBARROWS AND HAND TOOLS ALSO WILL BE WASHED DOWN AT THE 2%SLOPE f� �¢ZKt BINDING WIRE - TEMPORARY CONCRETE WASHOUT O. w O (`PER BALE) }1 _ _ 2 THE TEMPORARY CONCRETE WASHOUT AREA WILL BE CONSTRUCTED O Nt O ��—I' BEFORE ANY CONCRETE POURS OCCUR AT THE SITE I — -- z y 4, 3 CONCRETE POURS WILL NOT BE CONDUCTED DURING OR BEFORE AN III 5'O7 0 q m I I i I—I I i—H i—m —11I-1I�I I—I I�,T—m—ICI I I_ 3'MIN ANTICIPATED STORM EVENT 3'MIN PAVED FUEUNG AREA �r� 0 5 2O y o o -11.,,. — Ir—I II-��_ _ I l- -� TI BERM 4 WHEN THE TEMPORARY WASHOUT AREA IS NO LONGER NEEDED FOR THE BERM V W O OJ w SECTION A.A. 1. CONSTRUCTION PROJECT 1 Imo• Z w la Lg a NOT TO vu F =__I I I. 5 TEMPORARY CONCRETE WASHOUT WILL BE CONSTRUCTED WITH A .I I—III co a -O a 1 MINIMUM FLAT AREA OF B%B'AT THE BOTTOM OF THE PIT WITH 3 1 OR y SECTION A-A' FLATTER SIDE SLOPES HOWEVER,THE PIT SHOULD BE SIZED FOR SECTION A-A' a w x LATH AND FLAGGING NOT TO SCALE SUFFICIENT VOLUME AND QUANTITY TO CONTAIN ALL UOUID AND NOT TO SCAB cJ 17'HIGH DIVERSION BERM STAKE(TYP) ON 3 SIDES CONCRETE WASTE GENERATED BY THE WASHOUT OPERATIONS ON 3 DOWNHILL SIDES • . • • \AREs SANDBAG(TVP I 6 THE TEMPORARY UNLINED CONCRETE WASHOUT SHOULD BE A MINIMUM OF VMiEs /1 400'FROM ANY NATURAL DRAINAGE PATHWAY OR WATERBODY DO NOT a SANDBAG ITYP) j�.,,1 1 LOCATE UNLINED CONCRETERCIWASHOUT WITHIN t MA'OF ANYISI WELLS A 0 O mI O r TOP OF BERM DRINKING WATER SOURCE IF SITE CONSTRAINTS MAKE THIS INFEASIBLE OR f p a�I �, 0 IF HIGHLY PERMEABLE SOILS EXIST ON SITE THE CONCRETE WASHOUT Q ,��� II AREA MUST BE INSTALLED WITH AN IMPERMEABLE LINER(10 MIL PLASTIC 1.-. ��� 1 UNER)OR SURFACE STORAGE ALTERNATIVES USING PREFABRICATED Q a i For 9 VARIES B B • , , CONCRETE WASHOUT DEVICES OR A LINED ABOVE GROUND STORAGE AREA ' , SHOULD BE USED IN A . Q , , 7 THEWASHOUTTHAT ALLC WILL E WASHING DAILY AND AR HEAVYINTOTRAINS TO Q , , O PAVED FUELING AREA Iv MN ENSURE THAT ALL CONCRETE WASHING IS BEING DISCHARGED INTO THE VARIES BOTTOM OF BERM WASHOUT AREA THAT THERE ARE NO LEAKS OR TEARS ARE PRESENT AND TO IDENTIFY IF THE WASHOUT HAS REACHED 75%OF ITS HOLDING • • Sa • • ® I 0 6.- - 1 0 CAPACITY B DAMAGES TO THE CONTAINER SHOULD BE REPAIRED PROMPTLY O /,I_�, D 9 TEMPORARY CONCRETE WASHOUT SHALL BE REPAIRED CLEANED OR 10 MIL PLASTIC UNING O 0 O O 0 ENLARGED AS NECESSARY TO MAINTAIN FOR CONCRETE WASTE E= CO G xa I— STRAW BALE(TYP) 14 PLASTIC LINING MUST BE FREE OF HOLES TEARS.OR OTHER DEFECTS THAT COMPROMISE THE IMPERMEABILITY OF THE MATERIAL 1D MIL PLASTIC UNING 15 WHEN THE TEMPORARY CONCRETE WASHOUT IS FILLED TO 75%OF ITS is MIL PLASTIC LINING BOTTOM OF BERM PLAN PLAN CAPACITY THE WASHING WATER SHOULD BE VACUUMED OFF OR ALLOWED TOP OF BERM NOT TO SCALE NOT ID SCALE TO EVAPORATE TO AVOID OVERFLOWS 16 WHEN THE REMAINING CEMENTITIOUS SOUDS HAVE HARDENED THEY PLAN CONCRETE WASHOUT AREA CONCRETE WASHOUT AREA SHOULD BE REMOVED AND DISPOSED OF OR RECYCLED THE CONCRETE NOT TC SCALE WILL BE BROKEN UP REMOVED AND TAKEN TO A LANDFILL FOR DISPOSAL ABOVE GRADE CONTAINMENT AREA W/STRAW BALES OR BEFORE HUNG RAINS R THE BELOW-GRADE CONTAINMENT AREA 7 REC HEAVY O RAINS THE WASHOUT CONTAINERS UOUID VEL SHOULD BE LOWERED OR THE CONTAINER SHOULD BE COVERED TC AVOID AN OVERFLOW DUPING THE RAINSTORM i w w 18 SIGNS WILL BE POSTED MARKING THE LOCATION OF THE WASHOUT AREA TO 3 Z ENSURE THAT CONCRETE EQUIPMENT OPERATORS USE THE PROPER v o o FACILITY 1 ALL PETROLEUM-BASED PRODUCTS USED ON THE PROJECT SITE WILL BE USED STORED AND DISPOSED OF ACCORDING p cJ O TO FEDERAL STATE AND LOCAL REGULATIONS THE FOLLOWING PRACTICES ARE USED TC REDUCE THE RISK ASSOCIATED i Z WITH PETROLEUM PRODUCTS 2 ALL REFUELING,REPAIR AND CHANGING OF EQUIPMENT AND VEHICLE FLUIDS SHALL BE CONDUCTED IN A DESIGNATED g O O AREA 3 FUELING AREA CONTAINMENT SHOULD BE SIZED FOR 110%OF THE LARGEST STORAGE TANK CAPACITY WITH SUFFICIENT a SCI FREEBOARD TO CONTAIN THE 25-YEAR 24 HOUR STORM EVENT w o SILT FENCE 4 THE FUELING AREA AND CONTAINMENT AREA SHOULD BE A MINIMUM OF 50'FROM STORM DRAIN INLETS OPEN DITCHES 14 LOCATE ON DOWNHILL SIDE Iv WATERWAYS OR BODIES OF WATER µ SILT FENCE OF PORTABLE TOILET 5 MATERIAL FOR CONSTRUCTING THE DIVERSION BERM SHOULD BE SUFFICIENTLY IMPERVIOUS TO CONTAIN OIL --¢-¢- ------- LOCATE ON f 6 PLASTIC UNING MUST BE FREE OF HOLES TEARS OR OTHER DEFECTS THAT COMPROMISE THE IMPERMEABILITY OF THE DOWNHILL SIDE MATERIAL m O OF SOLID WASTE STD 7 FUEUNG AREA CONTAINMENT SHALL BE REPAIRED CLEANED OR ENLARGED AS NECESSARY TO MAINTAIN CONTAINMENT COLLECTION AREA PORTABLE FOR 110%OF LARGEST STORAGE TANK CAPACITY AND SUFFICIENT FREEBOARD TO CONTAIN THE 25-YEAR 24 HOUR STORM TOILET EVENT w N 8 DISPOSE OF ALL USED OIL.ANTIFREEZE SOLVENTS ANC OTHER AUTOMOTIVE-RELATED CHEMICALS ACCORDING TO MANUFACTURER INSTRUCTIONS '$c VEHICLE TRACKING 9 USED OIL ANTIFRFF7F AND SOME SOLVENTS CAN BE RECYCLED AT DESIGNATED FACILITIES BUT OTHER CHEMICALS MUST r: '. •.,..•L • ;.� .0 CONTROL BE DISPOSED OF AT A HAZARDOUS WASTE DISPOSAL SITE O N • I. • �t 10. THE PROJECT CONSTRUCTION MANAGER SHALL DISPOSE OF OR RECYCLE THESE MATERIALS ACCORDING TO FEDERAL z ��9.414 fit,. (GRAVEL ABPAVEMENTSURFAC STATE.AND LOCAL REGULATIONS �� - T�� 7 - �_ OTHER STABLE SURFACE) � DUMPSTER OR SOLID 3O:'�'� {� ,�� I 11 ALL VEHICLES ON THE PROJECT SITE WILL BE MONITORED FOR LEAKS ANC RECEIVE REGULAR PREVENTIVE MAINTENANCE I4I WASTE CONTAINER OS'I� iI dOS ALL SANITARY WASTE HILL BE COLLECTED FROM THE PORTABLE TOILETS AS REQUIRED BY TO REDUCE THE CHANCE OF LEAKAGE y O'1/40, �Y' Y, FEDERAL STATE AND LOCAL REGULATIONS 12 VEHICLES AND EQUIPMENT WILL BE INSPECTED DAILY .1'TH OpF7 �'y ^�� �'C THE PROJECT CONSTRUCT/ON MANAGER SHALL PROVIOE A SUFFICIENT NUMBER OF PORTABLE •.F• �Y" s:` C` TOILETS TO SERVE THE MAXIMUM NUMBER OF EMPLOYEES EXPECTED ON GTE DAILY 13 IF A LEAK IS DISCOVERED USE DRIP PANS AND ABSORBENTS UNDER OR AROUND LEAKY VEHICLES UNTIL THE LEAK IS o`' yc keel.: ���lll 1. 4 POSITION PORTABLE TOILETS SO THAT THEY ARE SECURE AND WILL NOT BE TIPPED OR REPAIRED A7 f�✓/ �'•' Ara, _ �� ���. KNOCKED O\ER 14 LEAKS WILL BE REPAIRED IMMEDIATELY OR THE PROBLEM VEHICLE(S)OR EQUIPMENT WILL BE REMOVED FROM THE - C I THE PORTABLE TOILE'S WILL BE MAINTAINED ANC INSPECTED WEEKLY FOR EVIDENCE OF PROJECT SITE -• ' LEAKING HOLDING TANKS I Ch olOPheT C Yulli 15 THE EOUIPMENT/VEHICLE STORAGE AREA AND FUEL TANKS WILL BE INSPECTEC WEEKLY ANC AFTER STORM EVENTS �1� 5 EAST NElt1TH PORTABLE MOILING TANKS WILL BE REMOVED FROM THE SITE ANC REPLACED 9PP WITH N. TOILETS 16 THE PROJECT CONSTRUCTION MANAGER WILL ENSURE THAT ALL PETROLEUM PRODUCT CONTAINERS PROVIDE uc.No CLEAN UP LEAKS AND SPILLS IMMEDIATELY SECONDARY CONTAINMENT 031822 CONTAINMENT TRAYS CAN BE USED AS SECONDARY CONTAINMENT IF PORTABLE TOILET E OCT05.17�2 GA A LEVEL GRAVEL OH PAVED PA[ 17 DOUBLE-WALLED CONTAINERS CAN BE USED AS OF SECONDARY CONTAINMENT ��-`e4AIDKAL 1'F� I NC CONSTRUCTION WASTE MATERIALS WILL BE BURIED ONSITE 7E 1B NOTE DOUBLE-WALLED CONTAINERS/TANKS WITH FITTINGS GP OPENINGS LOCATED BELOW THE LICUIC LEVEL OF THE 2 DESIGNATE A SCUD WASTE COLLECTION AREA E NRLTIJNIUAFENCCP ONE SHOULDCEBE IM1ETPLLEO cn THE DOWNHILL SEE OF THE PORTABLE TOILET ON CONTAINER MAY REQUIRE ADDITIONAL SECONDARY CONTAINMENT TC CONFORM TC FEDERAL STATE AND/OR LOCAL 3 THE SOUL WASTE COLLECTION AREA SHOULD BE LOCATED A MINIMUM OF 50 FEET AWAY FROM CONCENTRATED E IF PORTABLE TOUT IS LOCATED ON SINGLE FAMILY HOME SITE ANC GL'FENCE IS INSTALLED REGULATIONS FLOWS OF STORMWATER DRAINAGE COURSES AND STORMWATER DRAINS WATER BODIES AND SHOULD NOT BE AROUND THE PERIMETER OF THE PROJECT SITE THE ADDITIONAL SILT FENCE DIRECTLY 19 NOTE DOUBLE-WALLED CONTAINERS DO NOT PRECLUDE THE REQUIREMENT OF SECONDARY CONTAINMENT FOR (I) LOCATED IN AREAS PRONE TO FLOODING OR PONDING ADJACENT TO THE TOILETS NOT NECESSARY REFUELING OR TRANSFER OPERATIONS --I 4 ALL WASTE MATERIALS WILL BE COLLECTED AND STORED IN A PROPER RECEPTACLE IN ACCORDANCE WITH ALL 20 THE PROJECT CONSTRUCTION MANAGER SHALL DESIGNATED AN AREA FOR THE COLLECTION AND STORAGE OF ALL FEDERAL STATE AND LOCAL WASTE MANAGEMENT REGULATIONS SOLID WASTE GENERATED FROM CONSTRUCTION PORTABLE TOILET CONTAINMENT AREA PETROLEUM BASED PRODUCTS I— ACTIVITIES ON THE PROJECT SITE AND TRASH WILL BE DEPOSITED IN DUMPSTERS AND/OR OTHER SOLID WASTE NOT TO SCALE 21 THE CONTAINERS SHALL BE PROTECTED FROM RAIN EVENTS w W CONTAINERS ONLY TRASH AND CONSTRUCTION DEBRIS FROM THE SITE WILL BE DEPOSITED IN THE DUMPSTER 22 STORE CONTAINERS ON SPILL PALLETS OR EQUIVALENT STRUCTURES I! 0 5 NOTE ONLY APPROPRIATE SOLID WASTES SHOULD BE PLACED IN DUMPSTERS AND/OR SOLID WASTE CONTAINERS 23. CONTAINERS MUST BE STORED AND STACKED IN ACCORDANCE WITH THE MANUFACTURERS'DIRECTIONS V Z oZ{ CERTAIN WASTES SUCH AS HAZARDOUS WASTES APPLIANCES FLUORESCENT LAMPS PESTICIDES ETC MAY NOT BE 24 ANY ASPHALT SUBSTANCES USED ONSITE WILL BE APPLIED ACCORDING TO THE MANUFACTURERS RECOMMENDATIONS DISPOSED OF IN SOLID WASTE CONTAINERS FOR ANY ITEM THAT IS CONSIDERED HAZARDOUS WASTE FOLLOW THE 25 THE PROJECT CONSTRUCTION MANAGER WILL ENSURE THAT ALL SPILLS OR CONTAMINATED SURFACES ARE CLEANED UP J (J) PROCEDURES SPECIFIED IN THE STORMWATER POLLUTION PREVENTION PLAN(SWPPP) MATERIAL MANAGEMENT IMMEDIATELY USING DRY CLEAN UP MEASURES WHERE POSSIBLE AND ELIMINATE THE SOURCE OF THE SPILL TO PREVENT (3_ W THE FOLLOWING GOOD HOUSEKEEPING PRACTICES WILL BE FOLLOWED ONSITE DURING THE CONSTRUCTION PROJECT PRACTICES-HAZARDOUS PRODUCTS A DISCHARGE OR A FURTHERANCE OF AN ONGOING DISCHARGE THAT THE SURFACES ARE NOT CLEANED BY HOSING THE Z 0 1 IDENTIFY ALL HAZARDOUS AND NONHAZARDOUS SUBSTANCES PRESENT AT THE PROJECT SITE 6 LIQUID WASTE WILL NOT BE DISPOSED OF IN DUMPSTERS AND/OP SOLID WASTE CONTAINERS FOLLOW AREA DOWN THE PROJECT CONSTRUCTION MANAGER MUST COMPILE A LIST OF ALL CHEMICALS PRESENT AT THE PROJECT SITE ANC MANUFACTURES'FEDERAL STATE ANC LOCAL GUIDEJNES TC DISPOSE OF LIQUID WASTED PROPERLY 2 2E IF AGGREGATE ABOVEGROUND STORAGE CAPACITY OF PETROLEUM CONTAINERS/TANKS/DRUMS STORED ON THE PROJECT 0 Z OBTAIN A MATERIAL SAFETY DATA SHEET(MSDS;FOR EACH ONE 7 SILT FENCE SHOULD BE INSTALLED ON THE DOWNHILL SIDE OF THE SOLID WASTE COLLECTION AREA ON A MINIMUM SITE IS GREATER THAN'3N GALLONS THE PROJECT CONSTRUCTION MANAGER MUST PREPARE A SPILL PREVENTION 3 WHEN POSSIBLE ALL PRODUCTS WILL BE KEPT IN THEIR ORIGINAL C'CNTAINERS WITH THE ORIGINAL MANUFACTURES Z Z OF ONE SIDE LABEL CONTROL ANC COUNTERMEASURE ISPCC..AN _JJQJ SOUC WASTE-C=NSTRUCTION DEBRIS ANC TRASH COLLECTED IN THE CJMPS'ER ANC"LF S-JC WASTE 27 TO CALCULATE THE TOTAL ABOVEGROUNC STORAGE CAPACITY THE PROJECT CONSTRUCTION MANAGER CAN ADC IF IT 15 NC'POSSIBLE T_KEEP THE WITHT TD IN THEIF ORIGINAL G"NIAINERS WIT'-THE MAN-.JFACTJRES LABEL THE W CONTAINERS WILL BE HALLLEC TC AN APPROPRIATE WASTE DISPOSAL SITE. NEW CONTAINER MOST BE LABELED WITH THE NAME OF THE PROCU'TICHEMICAL THE UNIT NUMBER(WHEN APPLICABLE TOGETHER THE STORAGE CAPACITY CF ALL OF ETC RAGE CC NTAINERS'TANKS'DRUMS AZ WELL AS THE FUEL ANC FLUID > d L. SCHEDULE REGULAR SOLID WASTE COLLECTION PICKUPS TC PREVENT THE CONTAINERS FROM OVERFILJNG TANKS ON THE MOBILE ANC OPERATIONAL EC JIPMENT IN THIS CALCULATION INCLUDE ONLY THOSE TANKS THAT HAVE Z F. DURINu THE DEMOLITION PHASEEXPIRATION DATE(WHEN APPLICABLE.HANDLING INSTRUCTIONS AND HEA.TX'OR ENIVIRONMENTAL HAZARDS•WHEN Q W OF CONSTRUCTION PROVIDE EXTRA CONTAINERS ANC SCHEC JLE PICKUPS CN P APPLICABLE IF THIS INFORMATION IS NG'AVAILABLE ON THE MANJFACTJRES ORIGINAL LABEL OONSJLT THE MSDSS MORE THAN 55 GALLONS OF STORAGE CAPACITY THIS REQUIREMENT DOES NOT INCLUDE MOBILE REFJELERS a, 0 MORE FREQUENT BASIS FCF TrE RELEVANT WFRRMATK:N `DE IC THE AGGREGATE ABCVEGRCUNC STORAGE CAPACITY rF PETROLEUM PRCCJCTS OS THE PROJECT SITE IS GREATER CC d SMALLER SC.IG WASTE CONTAINERS WILL BE RAISED I:FF TOTE GFCL'NC WITS A PALLET CF AN EQUIVALENT THE FRCJECT CCNSTFL'CTICN MANAGER WILL MAKE SPECIAL NOTE CN THE INNENTCPY CF TnE HAZARDOUS CHEMICALS THAN 32L THE PROJECT CCNSTR'UCTICN MANAGER MUST FCLLCW ALL APPLCABLE PECERAL REGULATION:GOVERNING STRUCTURE - CN THE FRCJECT SITE THAT REQUIRE SPECIAL ANDLING STORAGE CR DISPOSAL. SECONDARY CONTAINMENT 0 Z Z THE PROJECT CCNSTRLC'ION MANAGER SHALL ENSURE THAT SILT FENCES INSTALLED CS THE DOWNHILL SLOPE E MPNL'FACTURERS RECOMMENDATIONS FOR PRCFER STCFAGE JSE ANC LISP,SAL MUST 6E FCLLCAWEC FOR ALL W BELOW THE SCUD WASTE COLLECTION AREA TC CONTAIN LEAKAGE ANC'CF SPILLAGE CHEMICALS ANC MATERIALS PRESENT CS THE FRCJECT SITE ? W ;: THE PROJECT Cf NSTFJCTION MANAGER MOST ENSURE THAT CUMFSTEPS AND'OF SCUD WASTE CONTAINERS HAVE 7. ALL MATERIALS STORED ON THE PROJECT SITE WILL RE STCREC IN A NEAT ORDERLY MANNER IN THEIF APPROPRIATE CC SECURE WATERTIGHT LIDS SC THEY CAN RE COVERED BEFCFECURING PERIODS CF RAIN -CONTAINERS J CI_14 IF DUMPSTERS AND'OR SOLID WASTE CONTAINERS DO NOT HAVE SECURE WATERTIGHT LIDS THEY MUST BE KEPT IN 6 MATERIALS THAT HAVE THE POTENTIAL FOR CONTAMINATING RUNOFF DURING STORM EVENTS WILL BE STORED IN THEIR J A COVERED AREA APPROPRIATE WATERTIGHT CONTAINERS STORED ON A SPILL PALLET UNDER A CANOPY TARPAULIN SHRINK WRAPPED OR 0 Z 15 INSPECT SOLID WASTE COLLECTION AREA ANC CHECK DUMPSTERS AND/OR SOLID WASTE CONTAINERS FOP LEAKS OTHERWISE PRECLUDED FROM DIRECT EXPOSURE OF PRECIPITATION FUELING AREA D 0 o SPILLS AND EXTERNAL CORROSION AND STRUCTURAL FAILURE WEEKLY AND IMMEDIATELY AFTER STORM EVENTS 9 ACCESS TO STORAGE AREAS MUST BE RESTRICTED TO PREVENT VANDALISM BELOW-GRADE CONTAINMENT AREA 0 Ifi CLEAN UP LEAKS AND SPILLS IMMEDIATELY 10. WHENEVER POSSIBLE ALL OF A PRODUCT WILL BE USED UP BEFORE DISPOSING OF THE CONTAINER 11 EMPTY CONTAINERS THAT MAY CONTAIN CHEMICAL RESIDUES SHALL BE DISPOSED OF IN ACCORDANCE WITH FEDERAL J SOLID WASTE COLLECTION CONTAINMENT AREA STATE AND LOCAL REGULATIONS —112 CHEMICAL OP PETROLEUM PRODUCTS WILL NOT BE MIXED WITH ONE ANOTHER UNLESS RECOMMENDED BY THE 0 NOT TC SCALE MANUFACTURER d 13 THE PROJECT CONSTRUCTION MANAGER WILL INSPECT THE INVENTORY ONLY TO ENSURE PROPER USE AND DISPOSAL OF MATERIALS ON THE PROJECT SITE 14 THE PROJECT CONSTRUCTION MANAGER WILL ENSURE ADEQUATE SUPPLIES ARE AVAILABLE AT ALL TIMES TO HANDLE DATE NOV 12 2021 SPILLS LEAKS AND DISPOSAL OF USED LIQUIDS SCALE AS SHOWN 15 ALL PROJECT PERSONNEL WILL BE INSTRUCTED ON GOOD HOUSEKEEPING PRACTICES JOB 20.1674 WPO 20210.053 GOOD HOUSEKEEPING4 SHEET OF 4 B. SOURCES OF POLLUTANTS,LOCATIONS,AND PREVENTION PRACTICES Minimization of exposure to precipitation and stormwater.Minimize the exposure of building materials,building products, nstruction wastes,trash,landscape materials,fertilizers,pesticides,herbicides,detergents,sanitary waste,and other materials event on the site to precipitation and to stormwater. Material/Chemical Physical Description Stormwater Pollutants Location-Areas Where Prevention Practices, used on site Control Measures Clearing,grading. Brown/Black/Gray silt Silt Throughout Follow Erosion and excavating and un- Sediment Control Plan. stabilized areas Dispose of clearing debris at acceptable disposal sites.Seed and mulch, or sod within 7 days of land clearing Dewatering Operations N/A Silt,gasoline,oil,etc. Designated area shown on Water shall be filtered. plan settled or similarly treated prior to discharge as shown onplan. Vehicle and equipment Silt,gasoline,oil,etc. Designated areas and details To be treated in a washing/Wash waters shown onplan sediment basin or better control as specified on plan. Minimize the discharge of pollutants from equipment and vehicle washing.Provide containment and filtering for allwash waters per the plan o^sticides(insecticides, Various colored to colorless Chlorinated hydrocarbons. Herbicides used for noxious Follow manufacturer's ngicides,herbicides, liquid powder,pellets or organophosphates, weed control instructions __denticides) grains carbamates,arsenic MSDS's attached. Fertilizer Liquid or solid grains Nitrogen,phosphorous Newly seeded area Apply fertilizers in accordance with manufacturer's recommendations and not during rainfall events Plaster White granules or powder Calcium sulphate,calcium Home construction Enclose or cover carbonate,sulfuric acid material storage areas. Mix paint indoors in a containment area orin a flat unpaved area. Prevent the discharge of soaps,solvents, detergents and wash water,paint,form release oils and curing compounds. Follow manufacturer's instructions MSDS's attached. Cleaning solvents Colorless,blue or yellow- Perchloroethylene,methylene Equipment Cleaning Enclose or cover green liquid chloride,trichloroethylene, material storage areas. petroleum distillates Mix paint indoors in a containment area orin a flat unpaved area. Prevent the discharge of soaps,solvents. detergents and wash water,paint,form release oils and curing compounds. Follow manufacturer's instructions MSDS's attached. Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Asphalt Black solid Oil,petroleum distillates Streets and roofing Cover storm drain inlets and use drip pans and absorbent/oil dry for all pavingmachines to limit leaks and spills Concrete and curing White solid/grey liquid Limestone,sand.pH, Curb and gutter,sidewalk Direct concrete wash compounds chromium and building construction water into a leak-proof container or leak-proof settling basin that is designed so that no overflows can occur.Follow manufacturer's instructions MSDS's attached. Glue,Adhesives White or yellow liquid Polymers,epoxies Home Construction Enclose or cover material storage areas. Mix paint indoors in a containment area orin a flat unpaved area. Prevent the discharge of soaps,solvents, detergents and wash water,paint,form release oils and curing compounds. Follow manufacturer's instructions MSDS's attached. Paints Various colored liquid Metal oxides,Stoddard Home Construction Enclose or cover solvent,talc,calcium material storage areas. carbonate,arsenic Mix paint indoors in a containment area orin a flat unpaved area. Prevent the discharge of soaps,solvents, detergents and wash water,paint,form release oils and curing compounds. Hydraulic oil/fluids Brown oily petroleum Mineral oil Leaks or broken hoses from Designated areas hydrocarbon equipment for material deliveryand storage. Placed near construction entrances,away from waterways and drainage paths Wood preservatives Clear amber or dark brown Stoddard solvent,petroleum Timber pads and home Enclose or cover liquid distillates,arsenic,copper, construction material storage areas. chromium Mix paint indoors in a containment area orin a flat unpaved area. Prevent the discharge of soaps,solvents, detergents and wash water,paint,form release oils and curing compounds. Follow manufacturer's instructions MSDS's attached. Gasoline Colorless,pale brown or Benzene,ethyl benzene, Secondary containment/ Designated areas pink petroleum toluene,xylene,MTBE staging area or leaks. for material hydrocarbon Deliveries to site deliveryand storage. Placed near construction entrances,away from waterways Issued— 10/2014 Stormwater Pollution Prevention Plan(SWPPP) Albemarle County and drainage paths Diesel Fuel Clear.Glue-green to yellow Petroleum distillate,oil and Secondary Designated areas liquid grease,naphthalene,xylenes containment/staging area or for material leaks.Deliveries to site. delivery and storage. Placed near construction entrances,away from waterways and drainage paths Antifreeze/coolant Clear green/3 ellow liquid Ethylene glycol,propylene, Leaks or broken hoses from Designated areas glycol,heavy metals(copper, equipment and deliveries to for material lead,zinc) site. deliveryand storage. Placed near construction entrances,away from waterways and • drainage paths Sanitary Toilets Various colored liquid Bacteria,parasites,and Location shown on plans Convenient and well- viruses maintained portable sanitary facilities will be provided,and located away from waterways or inlets. Such facilities shall be regularly maintained. Solid Waste Disposal Designed container areas Waste collection area shown on plan will not receive a substantial amount of runoff from upland areas and does not drain directly to a waterway.Containers have lids covered before periods of rain, or are in a coveredarea. Scheduled collection to prevent overfilling. MATERIALS NOT TO BE BURIED ON- SITE. Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County C. NON-STORMWATER DISCHARGES I'is expected that the following non-stormwater discharges will occur from the site during the construction period. I. 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. 2. Water used to control dust that has been filtered,settled,or similarly treated prior to discharge. 3. Potable water sources, including uncontaminated waterline flushing's/fire flow analysis. 4. 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. 5. 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. 6. Foundation or footing drains where flows are not contaminated with process materials such as solvents. 7. Uncontaminated excavation dewatering, including dewatering of trenches and excavations that have been filtered, settled,or similarly treated prior to discharge. 8. Landscape irrigation. All non-stormwater discharges will be directed to sediment control measures prior to discharge. Keep this CHART up-to-date with ongoing site changes and inspections. DischargePollutants or Pollutant Location on Site Constituents Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County D. PERSONS RESPONSIBLE FOR POLLUTION PREVENTION PRACTICES Towne District LLC,Charlie Armstrong 142 South Pantops Dr.Charlottesville, VA 22911 (434)245-0894 charlesa@southern-development.com Site contractor will be added during pre-con meeting; E. RESPONSE AND REPORTING PRACTICES Detailed response and reporting practices according to 9VAC25-880-70, Part II,section A.4.e. Minimize discharges from spills and leaks.Minimize the discharge of pollutants from spills and leaks and implement chemicalspill and leak prevention and response procedures as follows. Spill control Practices: In addition to the good housekeeping and material management practices discussed in the previous sections of this plan,the following practices will be followed for spill prevention and cleanup: 1. Manufacturers' recommended methods for spill cleanup will be clearly posted and site personnel will be made aware of the procedures and the location of the information and cleanup supplies. 2. Materials and equipment necessary for spill cleanup will be kept in the material storage area onsite. Equipment and materials may include but not be limited to brooms,dust pans,mops,rags,gloves,goggles,absorbent material(e.g.,kitty litter,sand,sawdust)and plastic and metal trash containers. 3. All spills will be cleaned up immediately after discovery. 4. In the event of a spill of a hazardous substance,the spill will be immediately contained and the spill area will be kept well ventilated. Personnel will wear appropriate protective clothing to prevent injury form contact with a hazardous substance during cleanup operation. 5. Spills of toxic or hazardous material will be reported to the appropriate State or local government agency,as required by regulatory standards.Call the agencies listed below to report any spills of toxic or hazardous material: CFD Station 1: 434-296-4092 Albemarle County Police Department: 434-972-4061 Albemarle County Health Department: 434-972-6200 VA Department of Conservation&Recreation: 1-804-786-2094 VDEQ Valley Regional Office:M-F,8:30-4:30 540-574-7800 VA Department of Emergency Services: 1-800-468-8892 Local VSMP Authority:M-F, 8:00-5:00 434-296-5832 Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Spill Procedure I) Check for hazards(flammable material,noxious fumes,cause of spill)- if flammable liquid,turn off engines and nearby electrical equipment. If serious hazards are present, leave the area and call 911. 2) Make sure the spill area is safe to enter and that it does not pose an immediate threat to health or safety of any person. 3) Stop the spill source. 4) Call co-workers and supervisor for assistance and to make them aware of the spill and potential dangers. 5) If possible,stop spill from entering drains(use absorbent or other material as necessary) 6) Stop spill from spreading(use absorbent or other materials necessary) 7) If spill material has entered a storm sewer or public waters; contact locality's storm sewer water department, locality's VSMP inspector, local VDEQ Office and VA Department of emergency services. 8) Clean up spilled material and do not flush area with water. 9) Properly dispose of cleaning materials and used absorbent material according to manufacturer specifications. **Spill report form and procedure can be found in Section 13. Additional Information and Logs** F. POLLUTION PREVENTION AWARENESS Material Management Practices/Spill Prevention: The following are the materials management practices that will be used to reduce the risk of spills or other accidental exposure of materials and substances to stormwater runoff. i. Employee Training: Employee training with regard to material management practices is conducted at the site. Training includes discussions of spill response,good housekeeping,and other material management practices. Employee training generally occurs with each new employee once hired by the site contractor. Weekly tailgate training meetings are advised to ensure that as the site evolves and changes employees are up to date on all PPP practices.A training log to document these meetings can be found in Section 13.Additional Information and Logs. ii. Good Housekeeping: The following good housekeeping practices will be followed onsite during the construction project. 1. All materials stored onsite will be stored in a neat,orderly manner in their appropriate containers. Materials which have the potential for contaminating runoff during storm events will be stored in their appropriate watertight containers,stored under a canopy,tarpaulin,shrink wrapped or otherwise precluded from direct exposure of precipitation. 2. Empty containers that may contain chemical residues shall be disposed of in accordance with State and Local regulations. 3. Products,where possible,will be kept in their original containers with the original manufacture's label. 4. Chemical or petroleum products will not be mixed with one another unless recommended by the manufacturer. 5. Whenever possible,all of a product will be used up before disposing of the container. 6. Manufacturer's recommendations for proper use and disposal will be followed. 7. The site superintendent will inspect daily to ensure proper use and disposal of materials onsite Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Hazardous Products: These practices are used to reduce the risk associated with hazardous materials.Hazardous waste to include oil filters, petroleum products, paint,curing compounds and equipment maintenance fluids. 1. Products will be kept in original containers unless they are not re-sealable. 2. Products will be stored in structurally sound and sealed containers and segregated from other non-waste materials. 3. Original specimen labels and materials safety data sheets will be kept on file:they contain important product information. 4. If surplus product must be disposed of,manufacturers and/or local and State recommended methods for proper disposal will be followed. Product Specific Practices: The following product specific practices will be followed onsite: i. Petroleum Products: 1. All onsite vehicles will be monitored for fluid leaks and will receive regular preventive maintenance to reduce the chance of leakage. 2. It is recommended that,if practicable,all refueling, repair and changing of equipment and vehicle fluids shall be conducted in a designated area,with the use of either spill buckets and/or fuel spill mats to reduce the potential for contamination. This area will be designed in a manner to reduce the potential for contamination of onsite resources. For refueling,repair and changing of equipment and vehicle fluids outside of the designated areas,care should be taken to avoid activities within+/-50 feet of wetlands,streams,water bodies,tree preservation areas or any other environmentally sensitive areas. 3. Petroleum products will be stored in tightly sealed containers which are clearly labeled. 4. An area will be designated for the collection and storage of all chemical and storage of all chemical and petroleum-based products and containers for those products. The containers shall be protected from rain events. 5. Any asphalt substances used onsite will be applied according to the manufacturer's recommendations. 6. The project superintendent will regularly inspect the site to ensure proper disposal methods of used antifreeze,oils,filters and other hazardous materials are followed. ii. Fertilizers: Fertilizers used will be applied according to manufacturer's product standards. The contents of any partially used bags of fertilizer will be transferred to a sealable plastic container to avoid spills. iii. Paints,Curing Compounds,Soaps,Solvents,and Detergents: All containers will be tightly sealed and stored when not required for use. Excess paint will be properly disposed of according to manufacturers' instructions or State and local regulations.Discharges of soaps, solvents and detergents are prohibited. iv. Concrete Trucks and Wash Water from Construction Materials and Vehicles: Concrete trucks will only wash out or discharge surplus concrete or drum wash water at approved locations in accordance with State and local regulations. Wash water must be directed into a leak proof container or leak- proof settling basin that is properly designed.The liquid and hardened concrete must then be handled and disposed of properly and is not to be discharged.Washout areas are identified on the SWPPP/PPP Reference Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Drawing.An EPA concrete washout factsheet is provided in Section 13. Water from vehicle wash stations(if needed)is to be directed to the nearest trap as shown on the approved erosion and sediment control plan before discharged. v. Solid Waste: All waste materials will be collected and disposed of into a metal trash dumpster in the staging area. Dumpsters will have a secure watertight lid, be placed away from stormwater conveyances and drains, and meet all local and state solid-waste management regulations. Only trash and construction debris from the site will be deposited in the dumpsters. All personnel will be instructed,during tailgate training sessions, regarding the correct procedure for disposal of trash and construction debris.Notices that state these practices will be posted in the office trailer and the individual who manages day-to-day site operations will be responsible for seeing that these practices are followed vi. Sanitary Waste: Portable lavatories are located on-site and are serviced on a regular basis by a contractor. They will be located in up-land areas away from direct contact with surface waters. Any spills occurring during servicing will be cleaned up immediately, including any contaminated soils,and disposed of according to all federal,state,and local regulations. vii. Minimization of Exposure to Precipitation and Storm Events In the event that precipitation is predicted onsite,construction activity operator to ensure that all building materials,building products,construction wastes,trash, landscape materials,fertilizers,pesticides,detergents, sanitary waste and other materials present onsite is protected from the runoff by the sure of covering tarps that securely fastened to eliminate blow off. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. NAME OF RECEIVING WATERS: Meadow Creek-Rivanna River JR14(020802040401) South Fork Rivanna River JR08(020802040203) MEASURES FOR APPLICABLE TMDL: DEQ staff has determined that the proposed land-disturbing activity will discharge to a surface water identified as impaired or for which a TMDL wasteload allocation has been established and approved prior to the term of the general permit for(i) sediment or a sediment-related parameter or(ii)nutrients.Therefore,the following general permit(Part I.B.4)and SWPPP requirements(Part II.A.5)must be implemented for the land-disturbing activity: • 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. • Nutrients(e.g.,fertilizers)shall be applied in accordance with manufacturer's recommendations or an approved nutrient 00management plan and shall not be applied during rainfall events. • Inspections shall be conducted at a frequency of(i)at least once every four(4)business days or(ii)at least once every five(5)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. • Representative inspections used by utility line installation,pipeline construction,or other similar linear construction activities shall inspect all outfalls. "Factsheets can be found in Section 13.Additional Information and Logs** Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 8. Qualified personnel The following personnel are responsible for inspections; Roudabush,Gale& Associates Inc. is responsible for the assisting the facility in developing, implementing, maintaining, inspecting and revising the facility's SWPPP. Below are the qualified personnel for the site; Kent Raine ESIN2027 kraine@roudabush.com Nicole Jamison DIN1114 njamison@roudabush.com Tim Duncan DIN0229 tduncan@roudabush.com Tyler Powell RLD20805 All persons listed above can be contacted at 434-977-0205 SWPPP AVAILABILITY: The Stormwater Pollution Prevention Plan,a copy of the VPDES permit,construction plans,and other materials referenced in this plan shall be retained at the project location. SWPPP mailbox found near construction entrance.Contact Roudabush, Gale,and Associates at 434-977-0205 with questions pertaining to the SWPPP. • Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 9. Signed Certification Certification according to 9VAC25-870-370 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: Charlie Armstrong Company: Towne District, LLC Title: Member Signature: Date: 5/19/22 Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 10. Delegation of authority. Delegation of Authority I, Charlie Armstrong (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 Dunlora Village Subdivision construction site. The designee is authorized to sign any reports, stormwater pollution prevention plans and all other documents required by the permit. Roudabush, Gale& Associates, Inc. (Company) Kent Raine (ESIN2027),Nicole Jamison (DINT 114), (Name of Person(s)) Tim Duncan (DIN07250), or Tyler Powell (RLD20805) 999 2nd Street SE (Address) Charlottesville, VA 22902 (City, State,zip) 434-977-0205 (Phone) By signing this authorization, I confirm that I meet the requirements to make such a designation as set forth in the ConstructionGeneral Permit (CGP), and that the designee above meets the definition of a"duly authorized representative". Operator Name: Charlie Armstrong Company: Towne District, LLC Title: Member Signature: Date: 5/19/22 Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 11. General permit copy Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County COMMONWEALTH of VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY 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. Construction General Permit Effective July 1, 2019 Page 2 of 26 PART I DISCHARGE AUTHORIZATION AND SPECIAL CONDITIONS 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 f. 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. Page 3 of 26 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 II G 2 a. 5. 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; Page 4 of 26 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 5. 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; 5. 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: Page 5 of 26 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. 5. 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 Page 6 of 26 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: Page 7 of 26 (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 Part II G 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; Page 8 of 26 (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; Page 9 of 26 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 Page 10 of 26 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; (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. 5. 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: Page 11 of 26 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 II B 2; 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. Page 12 of 26 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. 5. 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. Page 13 of 26 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 5 and B 6 as impaired or having an approved TMDL or Part I 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 Page 14 of 26 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; Page 15 of 26 (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: Page 16 of 26 (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; Page 17 of 26 e. The locations of control measures that failed to operate as designed or proved inadequate or inappropriate for a particular location; f. 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. 5. 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. Page 18 of 26 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 (1 VAC30-45 or 1 VAC30-46). 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. Page 19 of 26 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; Page 20 of 26 3. The date on which the discharge occurred; 4. The length of time that the discharge continued; 5. 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 III 12. 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; Page 21 of 26 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 Ill 12. NOTE: The reports required in Part Ill 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 9VAC25-870-420; 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 Page 22 of 26 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: 5. "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 Page 23 of 26 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. Page 24 of 26 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 U 3 a. Page 25 of 26 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 Ill 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 Ill I; and d. The operator complied with any remedial measures required under Part III S. 5. 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. Page 26 of 26 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 Y 2 b. 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. Section 12. Inspection logs Template for inspections. Requirements are listed in 9VAC25-880-70, Part II, section B and F. Storm water Construction Site Inspectionport General Information Project Name NPDES Tracking No. Location Date of Inspection Start/End Time Inspector's Name(s) Inspector's Title(s) Inspector's Contact Information Inspector's Qualifications Describe present phase of construction Type of Inspection: ❑Regular ❑ Pre-storm event O During storm event ❑ Post-storm event \i'eather Information Has there been a storm event since the last inspection? UYes ❑No If yes,provide: Storm Start Date&Time: Storm Duration(hrs): Approximate Amount of Precipitation(in): Weather at time of this inspection? O Clear ❑Cloudy ❑ Rain ❑ Sleet O Fog ❑Snowing ❑ High Winds ❑Other: Temperature: Have any discharges occurred since the last inspection? UYes ❑No If yes,describe: Are there any discharges at the time of inspection?UYes ❑No If yes,describe: Site-specific BMPs • Number the structural and non-structural BMPs identified in your SWPPP on your site map and list them below(add as many BMPs as necessary). Carry a copy of the numbered site map with you during your inspections. This list will ensure that you are inspecting all required BMPs at your site. • Describe corrective actions initiated, date completed. and note the person that completed the work in the Corrective Action Log. • BMP B1IP BMP Corrective Action Needed and Notes Date Installed? Maintenance Correctiv Required? e Action Taken 1 UYes ❑No UYes ❑No 2 UYes ❑No UYes ONo 3 UYes ❑No UYes ❑No 4 ❑Yes ONo UYes ONo 5 ❑Yes ❑No ❑Yes ONo 6 ❑Yes ❑No ❑Yes ONo 7 ❑Yes ONo UYes ONo 8 UYes ONo UYes ❑No 9 OYes ❑No UYes ONo 10 UYes ONo UYes ONo Issued— 10/2014 Stormwater Pollution Prevention Plan(SWPPP)Albemarle County BMP BMP BNIP Corrective Action Needed and Notes Date Installed? Maintenance Correctiv Required? e Action Taken 1I ❑Yes ❑No ❑Yes ❑No 12 ❑Yes LINO ❑Yes ❑No 13 ❑Yes ONo ❑Yes ❑No 14 ❑Yes ONo UYes ONo 15 ❑Yes ONo ❑Yes ONo 16 DYes ONo DYes ❑No 17 DYes ONo DYes ❑No 18 DYes ❑No DYes ONo 19 DYes ❑No DYes ONo 20 DYes ❑No DYes ONo Overall Site Issues Below are some general site issues that should be assessed during inspections Customize this list as needed for conditions at your site. BMP/activity Implemented? Maintenance Corrective Action Needed and Notes Required? 1 Are all slopes and DYes ❑No DYes DNo disturbed areas not actively being worked properly stabilized? 2 Are natural resource DYes ❑No• DYes ❑No areas(e.g.,streams, wetlands,mature trees, etc.)protected with barriers or similar BMPs? 3 Are perimeter controls DYes ONo DYes ONo and sediment barriers adequately installed (keyed into substrate) and maintained? 4 Are discharge points and DYes ONo DYes DNo receiving waters free of any sediment deposits? 5 Are storm drain inlets DYes ❑No DYes ONo properly protected? 6 Is the construction exit DYes ❑No DYes ONo preventing sediment from being tracked into the street? 7 Is trash/litter from work DYes ONo DYes ❑No areas collected and placed in covered dumpsters? 8 Are washout facilities :Wes ❑No :Wes UNo (e.g.,paint,stucco, concrete)available, clearly marked,and maintained? Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County BMP/activity Implemented? Maintenance Corrective Action Needed and Notes Required? 9 Are vehicle and ❑Yes ❑No ❑Yes No equipment fueling, cleaning,and maintenance areas free of spills, leaks,or any other deleterious material? 10 Are materials that are ❑Yes ❑No ❑Yes ❑No potential stormwater contaminants stored inside or under cover? 11 Are non-stormwater ❑Yes ❑No ❑Yes ❑No discharges(e.g.,wash water,dewatering) properly controlled? 12 (Other) ❑Yes ❑No ❑Yes ❑No Non-Compliance Describe any incidents of non-compliance not described above: CERTIFICATION STATEMENT "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 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." Print name and title: Signature: Date: Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 13. Additional Information and Logs Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Special Conditions Related to TMDL: Fact Sheets for Impaired (Category 4 or 5) Waters in 2020 James River Basin Cause Group Code:H28R-03-BAC Meadow Creek Cause Location: Meadow Creek from where it becomes a perennial stream downstream to its confluence with the Rivanna River. (Start Mile:4 98 End Mile 0 00 Total Impaired Size:4.98 Miles) City!County Albemarle Co Charlottesville City Use(s): Recreation Cause(s)/VA Category Eschenchia cob(E.cob)!4A Fecal Coliform/4A This segment is impaired due to exceedances of the e-coli bacteria WOS at station:2-MWC000.60(10 exceedances of 23 samples for e-coli). Initial Listing Date:2002- This segment is included in the EPA approved Meadow Creek bacteria TMDL. Federal TMDL ID#35779. Cyde TMDL Cause First Dev. Water Assessment Unit I Water Name / Location Desc. Category Cause Name Listed Priority Size VAV-H28RMWC01A00 / Meadow Creek ! Meadow Creek from 4A Eschenchia colt(E.coil) 2008 L 4.98 where it becomes a perennial stream downstream to its confluence with the Rivanna River. Meadow Creek Estuary Reservoir River Recreation (Sq.Miles) (Acres) (Miles' Eschenchia cob(E.colt)-Total Impaired Size by Water Type: 4.98 Cyde TMDL Cause First Dev. Water Assessment Unit / Water Name / Location Desc_ Category Cause Name Listed Priority Size VAV-H28RMWCO1A00 I Meadow Creek ! Meadow Creek from 4A Fecal Colrform 2002 L 4.98 where it becomes a perennial stream downstream to its confluence with the Rivanna River- Meadow Creek Estuary Reservoir River Recreation (Sq.Mlles) (Acres) (Miles) Fecal Coliform-Total Impaired Size by Water Type: 4.98 Sources: Agriculture Municipal(Urbanized High Sanitary Sewer Overflows Sewage Discharges in Density Area) )Collection System Failures) Unsewered Areas Unrestricted Cattle Access Wildlife Other than Waterfowl Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Fact Sheets for Impaired (Category 4 or 5) Waters in 2020 James River Basin Cause Group Code:H26R-04BEN South Fork Rivanna River Cause Location. South Fork Rivanna River from the RWSA SF Rivanna River Public Water Intake downstream to its confluence with the Rivanna River.(Start Mile:3.47 End Nile.0.00 Total Impaired Size-3.47 Miles) City/County' Albemarle Co Use(s). Aquatic Life Cause(s)/VA Category Benthic Macroinvertebrates Bioassessments/5A This segment is impaired due to exceedances of the General Standard for Benthics at stations:2-RRS001 81(Impaired for VSCI)and 2-RRS-RVN3I-RCA(Impaired for VSCI). Initial Listing Date 2010. Cycle TMDL Cause First Dev Water Assessment Unit / Water Name / Location Desc. Category Cause Name Listed Pnority Size VAV-H26R RRSO1A00 / Rivanna River South Fork I South Fork 5A Benthic Macromvertebrates 2010 H 3.47 Rivanna River from the RWSA SF Rivanna River Public Water Intake Bioassessments downstream to its confluence with the Rivanna River South Fork Rivanna River Estuary Reservoir River Aquatic Life (Sq.Miles) (Acres) Miles Benthic Macroinvertebrates Bioassessments-Total Impaired Size by Water Type: 3.47 Sources. Dam or Impoundment Municipal(Urbanized High Non-Point Source Density Area) Fact Sheets for Impaired (Category 4 or 5) it titers in 2020 James River Basin Cause Group Code:H2BR-05-BEN Meadow Creek Cause Location: Meadow Creek from where it becomes a perennial stream downstream to its confluence with Moores Creek.(Start Mile:4.98 End Mile:0.00 Total Impaired Size:4.98 Miles) City I County: Albemarle Co. Charlottesville City Use(s): Aquatic Life Cause(s)/VA Category: Benthic Macroinvertebrates Bioassessments 14A This segment is impaired due to exceedances of the General Standard for Benthics at station:2-MWC000.60(Impaired for VSCI);2-MWC-MWC03-RCA(Impaired for VSCI) 2-MWC-MWC07-RCA(Impaired for VSCI);2-MWC-MWC05-RCA(Impaired for VSCI);2-MWC-MWC06-RCA(Impaired for VSCI);2-MWC-MWC08-RCA(Impaired for VSCI).2-MWC-MWC09-RCA (Impaired for VSCI):2-MWC-MW C10-RCA Impaired for VSCI). Initial Listing Date:2006. Cyde TMDL Cause First Dev. Water Assessment Unit I Water Name / Location Desc. Category Cause Name Listed Priority Size VAV-H28R MWCO1A00 / Meadow Creek / Meadow Creek from 4A Benthic Macroinvertebrates 2006 L 4 9e where it becomes a perennial stream downstream to its confluence Bioassessments with the Rivanna River_ Meadow Creek Estuary Reservoir River Aquatic Life (Sq.Miles) (Acres) (Miles) Benthic Macroinvertebrates Bioassessments-Total Impaired Size by Water Type: 4.98 Sources Impervious Surface/Parking Loss of Riparian Habitat Municipal(Urbanized High Post-development Erosion Lot Runoff Density Area) and Sedimentation Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Grading and Stabilization Activities Log Project Name: Dunlora Village "WPPP Contact: Date Grading Location of Date Grading Activity Ceased Date When Description of Activity Initiated Grading (Indicate Temporary or Stabilization Measures Stabilization Measure Permanent) are Initiated and Location Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County SWPPP Amendment Log Project Name: Dunlora Village "WPPP Contact: Amendment Description of the Amendment Date of Amendment Amendment No. Prepared by IName(s)and Title] Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Pollution Prevention Plan Training Log Date Parties in Attendance Pollution Prevention Items Discussed Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Procedure for Spills of Non-Reportable Quantities knost spills can be cleaned up following manufacturer specifications. Absorbent/oil dry,sealable containers,plastic bag and ovels/brooms are suggested minimum spill response items that should be available at this location. 1) Check for hazards(flammable material, noxious fumes,cause of spill)-if flammable liquid,turn off engines and nearby electrical equipment. If serious hazards are present, leave the area and call 911. 2) Make sure the spill area is safe to enter and that it does not pose an immediate threat to health or safety of any person. 3) Stop the spill source. 4) Call co-workers and supervisor for assistance and to make them aware of the spill and potential dangers. 5) If possible,stop spill from entering drains(use absorbent or other material as necessary) 6) Stop spill from spreading(use absorbent or other material) 7) If spill material has entered a storm sewer;contact locality's storm sewer water department and locality's VSMP inspector. 8) Clean up spilled material and do not flush area with water. 9) Properly dispose of cleaning materials and used absorbent material according to manufacturer specifications. Spill Report Form Project Type and Location: Date/Time of Spill: _ Time Incident Contained: Spill Location and Events leading to Spill: Material Spilled: Source of Spill: Amount Spilled: Amount Spilled to Waterway: Surface Area of Impacted Media in Sq.ft.: Type of Media (Soil or Pavement): Corrective Action Taken: Action Taken to Prevent Future Spills: Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Agencies Notified: Modifications of Storm Water Pollution Prevention Plan: "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." Print Name/Title of Reporter: Signature: Date: Dmpany: Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County &EPA Stormwater Best Management Practice United States Environmental Protection Agency Concrete Washout146,Construction workers should handle wet concrete and Minimum Measure washout water with care because it may cause skin irritation Construction Site Stormwater Runoff Control and eye damage. If the washwater is dumped on the ground Subcategory (Fig. 1), it can run off the construction site to adjoining roads and enter roadside storm drains, which discharge to surface Good Housekeeping/Materials Management waters such as rivers, lakes, or estuaries. The red arrow in Figure 2 points to a ready mixed truck chute that's being washed out into a roll-off bin, which isn't watertight. Leaking Description of Concrete Washout at washwater, shown in the foreground. will likely follow similar Construction Sites Figure 1.Chuts Concrete and its ingredients _ ,y:�;' Aver washwater being dumped on the ground Concrete is a mixture of cement, water, and aggregate material. 03 y f Portland cement is made by heating a mixture of limestone and `" 4g!',10411•--- - clay containing oxides of calcium, aluminum, silicon and other ; . r- - metals in a kiln and then pulverizing the resulting clinker. The ` fine aggregate particles are usually sand. Coarse aggregate , is generally gravel or crushed stone. When cement is mixed .. !_,, with water, a chemical reaction called hydration occurs,which ' ''r` -roduces glue that binds the aggregates together to make • • • � ,� � . . oncrete. - / Concrete washout Figure 2.Chute After concrete is poured at a construction site, the chutes of washwater leaking from a roll-off bin being used as a - ready mixed concrete trucks and hoppers of concrete pump washout container _ . trucks must be washed out to remove the remaining concrete before it hardens. Equipment such as wheelbarrows and hand paths to nearby surface waters. Rainfall may cause concrete tools also need to be washed down. At the end of each work washout containers that are uncovered to overflow and also day, the drums of concrete trucks must be washed out. This is transport the washwater to surface waters. Rainwater polluted customarily done at the ready mixed batch plants,which are with concrete washwater can percolate down through the usually off-site facilities, however large or rural construction soil and alter the soil chemistry, inhibit plant growth. and projects may have on-site batch plants. Cementitious (having contaminate the groundwater. Its high pH can increase the properties of cement)washwater and solids also come from the toxicity of other substances in the surface waters and using such construction materials as mortar, plaster, stucco, soils. Figures 1 and 2 illustrate the need for better washout and grout. management practices. Environmental and Human Health Impacts Best Management Practice Objectives Concrete washout water (or washwater) is a slurry containing The best management practice objectives for concrete washout toxic metals. It's also caustic and corrosive, having a pH are to (a) collect and retain all the concrete washout water and near 12. In comparison, Drano liquid drain cleaner has a pH solids in leak proof containers. so that this caustic material of 13.5. Caustic washwater can harm fish gills and eyes and does not reach the soil surface and then migrate to surface interfere with reproduction. The safe pH ranges for aquatic life waters or into the ground water, and (b) recycle 100 percent abitats are 6.5-9 for freshwater and 6.5-8.5 for saltwater. of the collected concrete washout water and solids. Another Office of Water,4203M www.epa.gov/npdes/pubs/concretewashout.pdf EPA eb3-F-11-0 www.epa.gov/npdes/stormwater/menuofbmps February 2012 2 Stormwater Best Management Practice: Concrete Washout ajective is to support the diversion of recyclable materials from contacted to inquire landfills Table 1 shows how concrete washout materials can be about any pretreatment t. recycled and reused requirements, i.e., the _ National Pretreatment i - r-1_ Table 1-Recycling concrete washout materials Standards for Prohibited • `'}= l - r Concrete Washout Materials Dischargers (40CFR 403 5) - . _ CU T.- 65 before discharging the °' a] -p 3 m u, a "" w washwater to the POTW. - y cptin MP) -p U U a, c _ o). oar � o = o The washwater can also Uses of Recycled Materials � c�»_ � � �<c' = c� � c.� Figure 4.✓a:ourr g�;_a,3r•.vater Out j r e be retained in the washout washout container for treatment and reuse Reused to washout additional mixer truck chutes or drums x container and allowed to Reused as a ready mixed concrete x ; xb ; x x evaporate, leaving only the hardened cementitious solids to be ingredient — recycled Reused as an ingredient of precast concrete products.e g,highway x x x x x barriers,retaining wall blocks.riprap Solids recycling Reused as crushed concrete Tx x x x The course aggregate materials that are washed off concrete products,e.g.,road base or fill Reused to pave the yards of ready x truck chutes into a washout container can be either separated mixed concrete plants by a screen and placed in aggregate bins to be reused at Returned back to a surface water, x° the construction site or returned to the ready mixed plant and e.g.,river,lake, estu ary or a Fine particles of cementitious material(e.g.,Portland cement.slag cement.fly ash washed into a reclaimer (Fig. 5). When washed out into a silica fume) reclaimer, the fine and course aggregates are separated out b. Recyclable,if allowed by the concrete quality specifications and placed in different c. Treated to reduce the pH and remove metals so it can be delivered to a municipal wastewater treatment plant where it is treated further and then returned to a natural piles or bins to be reused j surface water in making fresh concrete. rillPlir' ... , Washwater recycling, treatment, disposal Reclaimers with settling tanks separate cement - . Washwater from concrete truckiii"`- fines from the washwater, chutes, hand mixers, or other and these fines can also equipment can be passed through - Allikesi°'-''' -- be used in new concrete a system of weirs or filters to remove unless prohibited by the solids and then be reused to wash Figure 5.Ready mixed truck washing user's concrete quality out into a reclaimer down more chutes and equipment --- specifications. at the construction site or as an ,. ,-, ingredient for making additional . "� Hardened concrete recycling concrete. A three chamber washout When the washwater in a construction site concrete washout filter is shown in Figure 3. The first - container has been removed or allowed to evaporate, the stage collects the coarse aggregate. hardened concrete that remains can be crushed (Fig. 6) The middle stage filters out the Figure 3.c,»o vas',00r and reused as a construction material. It makes an excellent small grit and sand.The third stage "'''' aggregate for road base and can be used as fill at the has an array of tablets that filter — -- construction site or out fines and reduces the pH.The filtered washwater is then discharged through a filter sock. An alternative is to pump the delivered to a recycler. -:" Concrete recyclers can washout water out of the washout container (Fig 4) and treat Vic, .� - be found at municipal the washwater off site to remove metals and reduce its pH. 1� �" " :: �;;,,.` -sue; ._ , . t. . solid waste disposal so it can be delivered to a publicly owned treatment works 46•. facilities. private (POTW), also known as a municipal wastewater treatment plant, hich provides additional treatment allowing the washwater Figure crusher 6.Crushed concrete stackpde era recycling plants, or large construction sites. ,J be discharged to a surface water.The POTW should be 2 Stormwater Best Management Practice: Concrete Washout let concrete recycling driver then washes down _' , ,, Builders often order a little more ready mixed concrete than the chute into the bucket to ,,,- remove anycementitious they actually need, so it is common for concrete trucks to 1�,, '% , have wet concrete remaining in their drum after a delivery.This material before it hardens. .! ( ;� . _ _ _ , After washingout the chute, unused concrete can be returned to the ready mixed plant and I either (1) used to pour precast concrete products (e.g., highway the driver pumps (yellow _ barriers retaining wall blocks, riprap), (2) used to pave the arrow points to the pump) ready mixed plant's yard, (3)washed into a reclaimer, or the washwater, sand. and other fine solids from the Figure 8.Chute washout bucket and (4) dumped on an impervious surface and allowed to harden, pump so it can be crushed and recycled as aggregate. Unused wet bucket up into the truck's concrete should not be dumped on bare ground to harden at drum to be returned to the construction sites because this can contribute to ground water ready mixed plant,where it can be washed into a reclaimer. and surface water contamination. A removable screen at the bottom of the washout bucket prevents course aggregate from entering the pump.This Washout Containers course aggregate can also be returned to the plant and added to the coarse aggregate pile to be reused.All the materials are Different types of washout containers are available for recycled collecting, retaining, and recycling the washwater and solids from washing down mixed truck chutes and pump truck Hay bale and plastic washout pit hoppers at construction sites. A washout pit made with hay bales and a plastic lining is shown in Figure 9. Such pits can be dug into the ground or built above Chute washout box grade. The plastic lining should be free of tears or holes that A chute washout box is mounted on the back of the ready would allow the washwater to escape (Fig. 10).After the pit is fixed truck. If the truck has three chutes,the following used to wash down the chutes of multiple ready mixed trucks procedure is used to perform the washout from the top down: and the washwater has evaporated or has been vacuumed off, (1) after the pour is completed,the driver attaches the extension the remaining hardened solids can be broken up and removed chute to the washout box, (2)the driver then rotates the main from the pit This process may damage the hay bales and chute over the extension chute(Fig. 7) and washes down the plastic lining. If damage occurs, the pit will need to be repaired hopper first then the main chute, (3) finally the driver washes and relined with new plastic. When the hardened solids are down the flop down chute and last the extension chute hanging removed,they may be bound up with the plastic lining and have on the box.All washwater and solids are captured in the box. to be sent to a landfill, rather than recycled. Recyclers usually After the wash down, accept only unmixed material. If the pit is going to be emptied ,■ washwater and solids are and repaired more than a few times, the hay bales and plastic ,j returned to the ready mixed will be generating additional solid waste. Ready mixed concrete :,, plant for recycling.A filter Figure 9.Hay bale and plastic basket near the top of the ' , ,•. " washout pit Iiiiil `k 4 __. " - - washout box separates out i MOMw''` the coarse aggregates so — ; they can be placed in a bin for reuse either at the construction site or back at Figure 7.Chute washout box the cement plant. Figure 10.Leaking washout pit that Chute washout bucket and pump :�111 1 has not been well �, maintained After delivering ready mixed concrete and scraping the last of .-- '"` 'tie customer's concrete down the chute,the driver hangs a .-.,3'. __;'� =:- rashout bucket shown in Figure 8(see red arrow) on the end of . ._ •- the truck's chute and secures the hose to insure no leaks.The .. . 3 Stormwater Best Management Practice: Concrete Washout icks can use hay bale washout pits, but concrete pump subsequent discharge to a surface water. Everything is recycled trucks have a low hanging hopper in the back that may prevent or treated sufficiently to be returned to a natural surface water. their being washed out into bale-lined pits. Figure 14.Pump truck using V e ramp to wash out into a roll-or'h,n • Vinyl washout container ,`:..4'.;' :; `» `- The vinyl washout = ' 0-..: f4'' • container (Fig. 11) is -- f"�J •. portable, reusable, and - IA "` easier to install than a - .t . _ Figure 15. hay bale washout pit. A - - Delivering • The biodegradable filter _,.\ ` • hardened Concrete Figure 11.Vinyl washout pit.vith filter bag - e.r to a recycler bag (Fig. 12) assists in extracting the concrete solids and prolongs the life of the vinyl - _ • . container. When the bag is lifted, the water is filtered out and ii t � the remaining concrete solids and the bag can be disposed of � together in a landfill, or the hardened concrete can be delivered to a recycler. After the solids have been removed several times - and the container is full of washwater, the washwater can be allowed to evaporate, so the container can be reused. The Another metal, portable, washout container, which has a washwater can be removed more quickly by placing another rain cover to prevent overflowing, is shown in Figure 16. It is filter bag in the container _ accompanied by an onsite washwater treatment unit, which and spreading water gelling " - :4-.,_ .. - reduces the pH and uses a forced weir tank system to remove ;li. -ranules evenly across the the coarse aggregate, fine aggregate, and cement fines.The ater. In about five minutes, ' washwater can the water in the filter bag will /I ' _ then be reused at __ turn into a gel that can be u • -. ,4 the construction pi�'� .__. ,� removed with the bag.Then • site to wash ' _ the gel and filter bag can be -- ' out other mixer _ . ..''� (CO � '' disposed to together. Figure 12.Extracting the concrete truck chutes - - `-- solids or gelled washwater and equipment. Figure 16.Washout container with a rain cover and Metal washout container The solids are onsite washwater treatment The metal roll-off bin (Fig. 13) is designed to securely contain allowed to harden s concrete washwater and solids and is portable and reusable. together and can - It also has a ramp that allows concrete pump trucks to wash be taken to a concrete - - - out their hoppers (Fig. 14). Roll-off providers offer recycling recycler (Fig. 17) to be 7, ' •/ services, such as, picking up the roll-off bins after the crushed and used as s washwater has evaporated and the solids have hardened, road base or aggregate �! replacing them with for making precast empty washout bins, and _ . •• products, such as delivering the hardened i '- `,+ retaining wall blocks. All Figure 17.Delivering hardened concrete concrete to a recycler ; . materials are recycled. to e recycler (Fig. 15), rather than a Si l landfill. Some providers will ' • '- '-v- Siting Washout Facilities vacuum off the washwater, - ----r' -�c::.?_ R r, Concrete washout facilities, such as washout pits and vinyl treat it to remove metals and or metal washout containers, should be placed in locations educe the pH, deliver it to a that provide convenient access to concrete trucks. preferably rastewater treatment plant Figure 13.Mixer truck being washed out near the area where concrete is being poured. However they for additional treatment and into a ro/:-off bin 4 Stormwater Best Management Practice: Concrete Washout could not be placed within 50 feet of storm drains, open Reference aitches, or waterbodies.Appropriate gravel or rock should cover approaches to concrete washout facilities when they are NRMCA 2009. Environmental Management in the Ready located on undeveloped property. On large sites with extensive Mixed Concrete Industry, 2PEMRM, 1st edition. By Gary M concrete work,washouts should be placed at multiple locations Mullins. Silver Springs, MD National Ready Mixed Concrete for ease of use by ready mixed truck drivers. If the washout Association. facility is not within view from the pour location, signage will be needed to direct the truck drivers. Websites and Videos Construction Materials Recycling Association Operating and Inspecting Washout www.concreterecycling org Facilities Concrete washout facilities should be inspected daily and after National Ready Mixed Concrete Association heavy rains to check for leaks, identify any plastic linings and www nrmca.org sidewalls have been damaged by construction activities, and determine whether they have been filled to over 75 percent National Ready Mixed Concrete Research and Education capacity.When the washout container is filled to over Foundation 75 percent of its capacity,the washwater should be vacuumed www.rmc-foundation org off or allowed to evaporate to avoid overflows.Then when the Additional information and videos on concrete washout remaining cementitious solids have hardened, they should be containers and systems can be found by a web search for removed and recycled. Damages to the container should be "concrete washout." repaired promptly Before heavy rains,the washout container's liquid level should be lowered or the container should be Dvered to avoid an overflow during the rain storm. Photograph Credits Figures 1,2 Mark Jenkins, Concrete Washout Systems, Inc Educating Concrete Subcontractors Figure 3 Mark Shaw, Ultra Tech International, Inc Figure 4.Mark Jenkins, Concrete Washout Systems, Inc The construction site superintendent should make ready mixed Figure 5.Christopher Crouch, CC/Consulting truck drivers aware of washout facility locations and be watchful Figure 6 William Turley, Construction Materials Recycling Association for improper dumping of cementitious material. In addition, Figure 7 Brad Burke,Innovative Concrete Solutions,LLC concrete washout requirements should be included in contracts Figure 8.Ron Lankester, Enviroguard with concrete delivery companies. Figures 9, 10 Mark Jenkins, Concrete Washout Systems, Inc. Figures 11, 12 Tom Card, RTC Supply Figures 13, 14, 15.Mark Jenkins, Concrete Washout Systems,Inc. Figures 16, 17.Rick Abney Sr., Waste Crete Systems, LLP Disclaimer Please note that EPA has provided external links because they provide additional information that may be useful or interesting.EPA cannot attest to the accuracy of non-EPA information provided by these third-party websites and does not endorse any non-government organizations or their products or services. 5