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HomeMy WebLinkAboutWPO202000023 VSMP - SWPPP 2020-04-20of AL COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, North Wing Charlottesville, Virginia 22902-4596 Tel. (434) 296-5832 • Fax (434) 972-4126 �'IRGI1�11P Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At: Project Name: WP0202000023 Pantops Corner Holiday Inn Express Address: 1260 Richmond Rd Charlottesville, VA 22911 TMP 78-58G1 Prepared by: Shimp Engineering, P.C. Prepared for: Pantops Partners LLC SWPPP Preparation Date: 04/20/2020 APPROVED by the Albemarle County Community Development Department Date 04/29/2020 File WP0202000023 (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 See. 17-405) 1. Registration statement 2. Notice of general permit coverage 3. Nature of activity 4. Erosion and Sediment Control Plan. 5. Stormwater Management Plan 6. Pollution Prevention Plan. 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. 8. Qualified personnel 9. Signed Certification 10. Delegation of authority. 11. General permit copy 12. Inspection logs Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 1. Registration statement Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 2. Notice of general permit coverage (This notice is to be posted near the main entrance according to 9VAC25-880-70, Part II, section C.) 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: 1113 ❑ IIC ❑x REGISTRATION STATEMENT 2019 Application type. x❑ 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 VI. (per Part III. K. of the VAR10 Permit). Operator Name: Pantops Partners LLC Contact person: Amir Patel Address: 5679 Boydton Plank Rd City, State Zip Code: Dinwiddie, VA 23803 Phone Number: 804-814-2905 Primary Email: amir@tankkgroup.com CC Email: Wilson@jwenochs.com, justin@shimp-engineering.com B. Billing Information (leave blank if same as the Operator identified in Section I. A. above). This entity will receive Annual Permit Maintenance and Permit Modification Fee invoices (if applicable). Name: Contact Person: Address: City, State Zip Code: Phone Number: Primary Email: CC Email: C. May we transmit correspondence electronically? You must choose YES and include a valid email in order to pay by credit card and to receive your permit coverage approval letter via email: YES N NO ❑ Section II. Construction Activity Location Information. Project site 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 water bodies receiving stormwater discharges from the site. B. Construction Activity Name: Pantops Corner Holiday Inn Express Address: Pantops Corner Way City and/or County and Zip Code: Charlottesville, VA 22911 Municipality: Albemarle County Latitude and Longitude (6-digit, decimal degrees format): 38.035225,-78.452605 C. Construction Activity Entrance Location (description, street address and/or latitude/longitude in decimal degrees): 38.035225,-78.452605 Rev 01/2020 PAGE 1 16 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019 Section III. Offsite Support Activity Location Information. List all offsite support activities to be included under this permit registration. Enter additional areas on a separate page. Offsite areas not included on this registration will need to obtain coverage under a separate VPDES permit. A. Offsite Activity Name: Address: City and/or County and Zip Code: Latitude and Longitude (6-digit, decimal degrees format): B. Offsite Activity Entrance Location (description, street address and/or latitude/longitude in decimal degrees): Section IV. Site Information. A. Property Owner Status: B. Nature of the Construction Activity Description (i.e. commercial, industrial, residential, agricultural, environmental): C. Municipal Separate Storm Sewer System (MS4) name(s) (if the site is discharging to a MS4): FEDERAL ❑ STATE ❑ PUBLIC ❑ PRIVATE X❑ commercial - hotel Albemarle Cou D. 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 (including the entire area to be disturbed as approved in the Stormwater 2.88 Ac Management Plan): Primary estimated area to be disturbed (portions with Erosion and Sediment Control Plan approval only): 2.83 Ac Offsite estimated area to be disturbed (if applicable): 0 Ac E. Estimated Project Dates (M M/D D/YYYY) Start date: 04/15/2020 Completion date: 04/15/2021 F. Is this construction activity part of a common plan of development or sale? YES Fx] NO ❑ G. 6" Order Hydrologic Unit Code (HUC) and Receiving Water Name(s). Attach a separate list if needed. HUC RECEIVING WATERBODY(S) 020802040401 Rivanna River, Meadow Creek Section V. Other Information. A. A stormwater pollution prevention plan (SWPPP) must be prepared in accordance with the requirements of the General VPDES Permit for Discharges of Stormwater from Construction Activities prior to submitting the Registration Statement. By signing the Registration Statement, the operator is certifying that the SWPPP has been prepared. B. Has an Erosion and Sediment Control Plan been submitted to the VESC Authority for review? YES X❑ NO ❑ Erosion and Sediment Control Plan Approval Date (for estimated area to be disturbed).: 07/16/2019 C. Has land disturbance has commenced? YES X❑ NO ❑ D. Annual Standards and Specifications. If this project is utilizing approved Annual Standards and Specifications (AS&S), attach the completed AS&S Entity Form. AS&S Entity Name (if different from the Operator identified in Section II. A.): n/a Rev 01/2020 PAGE 2 16 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019 Section VI. 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 stormwater associated with a large or small construction activity, operator means any person associated with a construction project that meets either of the following two criteria: (i) the person has direct operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications or (ii) the person has day-to-day operational control of those activities at a project that are necessary to ensure compliance with a stormwater pollution prevention plan for the site or other state permit or VSMP authority permit conditions (i.e., they are authorized to direct workers at a site to carry out activities required by the stormwater pollution prevention plan or comply with other permit conditions). in the context of stormwater discharges from Municipal Separate Storm Sewer Systems (MS4s), operator means the operator of the regulated MS4 system. 9VAC25-880-70. Part III. K. Signatory Requirements. Registration Statement. All Registration Statements shall be signed os follows: a. For a corporation: by a responsible corporate officer. For the purpose of this chapter, a responsible corporate officer means: (i) a president secretory, 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: Signature (signed in ink): Date Signed: Section VII. 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: Department of Environmental Quality Office of Stormwater Management Suite 1400 PO Box 1105 Richmond VA 23218 constructiongp@deg.virginia.gov If the locality is the VSMP Authority, please send to: The Local VSMP Authority insert address below Rev 01/2020 PAGE 3 16 Section 3. Nature of activity THIS PROJECT IS TO COMPLETE GRADING AND CONSTRUCTION FOR A HOTEL. THE SITE HAS BEEN MASS GRADED, AND UTILITY INSTALLATION IS COMPLETED. REMAINING SITE WORK IS BUILDING CONSTRUCTION, PAVING, AND FINAL GRADING AND STABILIZATION. THE TOTAL AREA OF DISTURBANCE IS 2.83 ACRES. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 4. Erosion and Sediment Control Plan. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County ER0510N * SEDI M ENT CONTROL PLAN I OR PANTOP5 CORNER HOLIDAY INN EXPRESS LEGEND EXIST NEW DESCRIPTION 16°TC * 1z'Tr TOP OF CURB ELEVATION 76° x 12' SPOT ELEVATION 15nv x 127TW TOP OF WALL ELEVATION 76°Bw x 12'Bw BOTTOM OF WALL ELEVATION BENCHMARK STORM SEWER ROOF DRAIN SEWER LINE WATER LINE GAS LINE - are- wr OVERHEAD ELECTRIC WIRE -arE- -arE- UNDERGROUND ELECTRIC OVERHEAD TELEPHONE LINE am aarvar UNDERGROUND TELEPHONE LINE Ell -, I- l DRAIN INLET (DI) O O STORM/SANITARY MANHOLE C C PLUG • a WATER VALVE & BOX j + FIRE HYDRANT ® ®" WATER METER 0-0 LIGHT POLE -0- UTILITY POLE PROPERTY LINE ---- ADJACENT PROPERTY LINE VACATED PROPERTY LINE BUILDING SETBACK �x- PARKING SETBACK SANITARY EASEMENT -- - GRADING EASEMENT DRAINAGE EASEMENT UTILITY EASEMENT - - - - - - WATER EASEMENT ACCESS EASEMENT STORM DRAINAGE EASEMENT TREE LINE FENCE STREAM 312 - 12 - INTERVAL CONTOUR -30I>- -Go- INDEX CONTOUR CG-2 CG-2 STANDARD 6" CURB CG-e CG-6 COMBINATION I CURB & GUTTER F CONCRETE PAVEMENT / SIDEWALK RIPRAP ASPHALT GRASS EC-2 MATTING EC-3 MATTING WETLAND 10 1a PARKING COUNT CROSSWALK HANDICAP ACCESSIBLE AISLE ® ®CG-12 y & HANDICAP PARKING NOTE: 1. THE SIZE OF THE SYMBOLS MAY VARY FROM WHAT IS SHOWN WFO 202000023 TAX MAP 78 PAKCEL5 58G KIVANNA D15TKICT, ALPEMARLE COUNTY, VIKGINIA VICINITY MAP SCALE: 1••=1,000• n r x1 aJ Nt,h0l Fell • .$ r �r1rn icu i ,rtA a e'Yc:,kt onryW C• Cp o' SITE der r r„fie `Yazr. 0 zA 0 Olym^1a[n ,�r .s A7ityrro earam,ry - PdnIaP: Shujipill,g Centerigi - y � ad" We. 2 Giant Food �. a sue' c c `Meade Fiat" Part firvan+iew Fa. a P vt. Jlr H Pit SPOP FINtaurant sqr . A . laver livEHti CONDOS Mn r�Var`. Hdlto IMAGE PROVIDED BY GOOGLE MAPS SHEET INDEX C I - COVER SHEET C2 - E5C NARRATIVE C3 - E5C PLAN PHASE I C4 - E5C PLAN PHASE 2 C5 - E5C DETAILS PERMIT NARRATIVE This is an Erosion & Sediment Control Plan for a new construct[.. permit for the Pantops Corner Holiday an Express Site (TMP 78-58G1)_ The site has a current VSMP approval under WPO 20180008B and a land disturbance permit VAR10E170. These permits included all VSMP required items fro the Holiday Inn Express Site. The owner/operator who held the VAR10E170 perm It has sold the Holiday Inn Express Site to Pantops Partners, LLC. Pantops Parton, LLC has hired Shimp Engineering, P.C. to prepare documentation for se wring a eve land disturbance permit far this site. This requires a1. registration statement, SWPPP, WED Appllcation, and Erosion & Sediment Control Bonds. This site is still covered by the Perri Stormwater Management Plan approved In WPO 201800088. These zt.rmwater bonds ore still posted, as such new SWM bonds are not needed. This plan shows the er on & sediment control items required far ongoing construction of the Holiday Inn Express. At the date of submlltal, mass grading has been generally completed and the building foundation is under construction The majority of remaining ESC items involve site sTotal at [an silt fence maintenance, and Inlet protection. At the end of construction, the underground detention system will need to be cleaned as part of permit release. OWNER / DEVELOPER PANTOPS PARTNERS - 11401 MCCABES GRANT TERRIF H ENRI CO VA. 23233 LEGAL REFERENCE: OF 5275 PG 289 ZONING: TM P 78-58G1 HC - HIGHWAY COMMERCIAL, EC - ENTRANCE CORRIDOR PER APPROVED APPLI CAPON PLAN. ZMA 2013-00002. SOURCE OF BOUNDARY & TOPO BOUNDARY & TOPOGRAPHIC SURVEY INFORMATION FROM FIELD SURVEY PROVIDED BY ROGER W. RAY & ASSOCIATES, INC. ON MARCH 23, 2018. FIELD VERIFIED BY SHIMP ENGINEERING, P.C. (11/21/18). BENCHMARK(S): NAVO NAD8388VA STATE PLANE SOUTH EXISTING USE CONSTRUCTION - MASS GRADING UNDER PERMIT VAR10E170 PROPOSED USE HOTEL BUILDING UNDER NEW DEQ PERMIT FLOOD ZONE ACCORDING TO THE FEMA FLOOD INSURANCE RATE MAP, EFFECTIVE DATE FEBRUARY 4, 2005 (COMMUNITY PANEL 51003CO287D), PORTIONS OF THIS PROPERTY LIE WITHIN THE ZONE AE 100-YEAR FLOOD PLAIN. RELEVANT PLANS Other plans involved with this Erosion Control plan: WPO 201800088 SDP 201800089, SUB 201900024 STEEP SLOPES ALL ONSITE MANAGED & PRESERVED SLOPES ARE SHOWN. WATERSHED THIS SITE TIES WITHIN THE UPPER RIVANNA RIVER WATERSHED. THIS SITE IS NOT WITHIN A WATERSHED OF A PUBLIC WATER SUPPLY. ACT LAND USE SCHEDULE fu 5(ip s Lic.. _ }5183 PROPOSED AREA % NEW IMPERVIOUS 90,122 BE 71.8% TURF/OPEN SPACE 35471 OF 28.27 �J,SIONAL EZ°O TOTAL= 125,593 SF (2,88 AC.) AREA OF DEVELOPMENT - 2.88 ACRES LIMITS OF DISTURBANCE = 2.83 ACRES GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS 1. The plan approving authority must be notified one week prior to the pre -construction conference, one week prior to the commencement of land disturbing activity, and one week prior to the final inspection. 2. All erosionand sediment control m will be constructed and maintained according to m nn- standards and specifications of the Virginia Erosion and Sediment Control Handbookono Virginia Regulations VRs625-02-00 Erosion and Sediment Contra[ Regulations. 3. All er and sediment control measures are to be placed prior to or as the first step in clearing, 4 A copaysi of the approved er and sediment control plan sholl be maintained on the site at all times. 5. Prior to commencing land d9,Wrhing activities in e other than indicated an these plans (Including, but not limited to, off -site borrow ar waste areas), the contractor shall submit supplementary erosioncontrol pion to the owner for re and approval by the plan approving authority. 6. The eontmclar is responsible for installation of any additional er control m necessary to prevent erosionand sedimentation as determined by the plan approving authority, 7. All disturbed area, re to drain to approved sediment control m s at all timesfeduingland disturbing activities and during site development until final stabiL,stion is achieved. 8. During dewateringsopair ions, water will be pumped into an approved filtering device. 9. The contractor shall inspect all era central ...... es periodically and offer each runoff producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immeditl, 10. All fill material tb be taken from an approved, designated borrow area 11, All waste mmonals shall be taken to an approved waste area Earth fill shall be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 1Z Borrow or waste ar re to be to within 7 days of completion per Zoning Ordinance section 5A.28. 13. All inert materials shall be transported in ompfiance with section 73-301 of the Code of Albemarle. 14. Be,row, till or waste activity involving industrial -type power equipment shall be limited to the hours of 7:OOom to 9:OOpm. 15. Borr w, fill o aste activity shall be conducted in safe manner that maintains lateral support, or order to minim ze any hazard to persons, physical damage to adjacent land and improvements, and damage to any public street because o slides, sinking, or collapse. s 16. The developer shall re ve the right to install, mntain, aireconvert to permanent stormwater management facilities where applicable all erasion control measures required by this plan regardless of the sale of any lot, unit, building or other portion of the property_ 17. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75 Ibs/ocre, and in the months of September to February to ro slat o 50/50 mix f Annual Ryegross and Cereal Winter Rye, or in March and April to consist of Annual Rye, or May through August to consist of German Millet. Straw mulch Is to nbe applied at 80lbs/100sf. Alternatives are subject to approved by the County erosion control inspector. 18. Permanent stobilizatian shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade pmestone shall be applied of 901ba/1 QOOsf, incorporated into the top 4-5 inches of soil. Fertilizer shall be applied at 10001bs/acre and consist of a 1o_20-10 nutrient mix Permanent seeding shall be applied at 1801bs/ocre and consist of 95% Kentucky 31 or Tell Fescue and 0-57. Perennial Rysgmen or Kentucky Bluegrass. Straw mulch is to be applied at 801bc/100sf. Alternatives are subject to approved by the Fronty aroi control inspector 19. Mmnt.... ce: All measure, re to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repaired immediately. Silt traps are to be cleared when 507. of thewet storage volume Is filled with sediment. All seeded areasre to be reseeded when ........yu toachieve a good stand of grass. Silt fence and dlv,m,a dykes which or, collecting sediment to half their height most be cleaned and repaired immediately. 20. All temporary er and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no longer needed, subject to approval by the County erasion control inspector. 21, This plan aha11 be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordinance section 17-204G.) 22. Permanent vegetation shall be installed on all denuded areas within nine (9) months after the date the land disturbing activity commenced. (Water Protection Ordinance section 17-207B) GENERAL CONSTRUCTION NOTES 1. Prior to any construction within any existing public right-of-way, including connection to any existing road, o permit shall be obtained from the Virginia Department of Transportation (VDOT). This plan as drawn may not accurately reflect the requirements of the permit. Where any discrepancies oc ur the requirements of the permit shall govern. 2. All mat"'let, and construction methods shall conform to current specifications and standards of VDOT unless otherwise noted. 3. Erosion and siltation control m r shall be provided in ceordance with the approved erasion control plan and shall be installed prior to any clearing, grading o other construction. 4. All slopes and disturbed areas ore to be fertilized, seeded and mulched, 5. The maximum allowable slope Is 2:1 (horizontal: vertical). Where reasonably didolnable, lesser slopes of 1:1 or better are to be achieved. 6. Paved, rip -rap or stabilization mat lined ditch may be required when in the opinion of the County Engineer, or designee, it is deemed necessary in order to stabilize a drainage channel. 7. All traffic control signs shall conform with the Virginia Manual for Uniform Traffic Control Devices. 8. Unless otherwise noted all concrete pipe shall be reinforced concrete pipe - Class III. 9. All excavation for underground pipe installation must comply with OSHA Standards for the Construction Industry (29 CFR Part 1926). PROJECT DESCRIPTION, GENERAL NOTES, EROSION & SEDIMENT CONTROL NOTES, AND SEQUENCE OF CONSTRUCTION ti y COUNTY OF ALBEMARLE oe. irentnlfcnmmunl Revel. omeni Imrt 9 p Construction Record Drawings (As -built) for VSMP Tile following is a fist of information required on construction record drawings for str rmwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the construction record drawing be prepared by 3omeone other than the designer Please do not provide design drawings as construction record drawings. A. A signal and datcat professional sett of the preparing enginceror surveyor. B. The name and address of the firm and individual preparing [be drawings on the fille sheet. C_ The constmi location of all items associated with each facility. and the inspection records to verify proper dimensions, materials and installation. Ilia items include, but are not haled to the following: 1. Inspection Records and photographs for pipe trenches and bedding, including underdrains. 2 V tdeo Pipe Inspection fur any pipes whicham not accessible or viewable. 3. Updated Location with geo-coordinates of all facilities. 4. Verified Drainage Area maps Idr the drainage area treated, and for drainage to the facilities. 5. Current physical and lopographic survey for all earthen structures. Ponds should include a survey of the pond bottom. Surveys should verify pond volumes are per design. Corrections maybe required for alterations from the design. 5. Plants, locationand type. 7. Plans and prnflles to all culverts, Pipes, Risers, Weirs and Drainage structures - Display the installed type of drainage structures, culverYpipe size, weirs, materials, inlets or end troatmont(s), inlet and outlet protection, alignment and invert elevations compared to design. 8. Computalions: For signihcant deviations from design, provide scaled compuLahnns verifying that the as -built condition is equivalent or better than design. e9 gn. 9, Ditch, Tines - Display the constructed location of all ditch lines and channels including Teal P y g ryp sections and litungs. 10, Easements - Show at I platted easements with dead book references labeled- Facilities and drainage must be within platted casements. Provide copies of fecouded dra:urm;nts. 11. Guardrail, fences or other safety provisions - Display the constructed location of all safely provisions; fences, guardrail, including the type, length and applied end treatments, compared to design. 12, Material layers- binfilter media, stone layers, sand layers, keyways and cores most be verified as to material types and depths_ Include inspection repnrs. horing or test pit reports and marerials certifications. Biofitlor media must be an approved stale mix. II Access rands - show location of aeeess mads, surface trey anent, drainage, etc, as applicable, 14. Compaction reports are Tailored to verify fill wmpachon in dams. 15. Manufacturers certifications for proprietary BMPi certifying properinstallation and fwcL oning. :i�AY9tYYYY31�@1N THIS SITE IS A GRADED LOT AT NEAR ITT 20 INALBEMARLE COUNTY BEING DEVELOPED INTO A HOTEL. THE LIMITS OF DISTURBANCE IS 2.83 ACRES. THE PROJECT INVOLVES THE FOLLOWING WORK ACTIVITIES: 1, THE CONTRACTOR SHALL OBTAIN ALL LOCAL AND STATE EROSION AND SEDIMENT PERMITTING REQUIREMENTS AND MAINTAIN ALL EROSION AND SEDIMENT CONTROLS IN ACCORDANCE WITH THE PERMIT REQUIREMENTS. 2. INSTALLATION OF PERMANENT EROSION AND SEDIMENT CONTROL MEASURES AS SHOWN ON THE PLAN AND BE AILS. 3. GRADING AND PLACEMENT OF FILL SHALL BE IN GENERAL ACCORDANCE WITH THE PLAN. 4. ESTABLISHMENT OF PERMANENT STABILIZATION OF ALL DISTURBED AREAS. EXISTING SITE CONDITIONS THE EXISTING SITE IS CLEARED AND HAS A CURRENT GRADING PERMIT. ADJACENT PROPERTIES THIS PROPERTY IS BORDERED TO THE NORTH BY FORESTED LOTS, WEST, EAST AND SOUTH BY EXISTING STREETS. OFFSITE AREAS: SOIL MAY NEED TO BE EXPORTED FROM THE SITE TO SITES WHICH SHALL HAVE EROSION CONTROL PERMITS. SOILS THE SITE CONTAINS THE FOLLOWING SOIL TYPES: 12C - CATOCTIN SILT LOAM - 7 TO 15% SLOPES, HSG B 12D - CATOCTIN SILT LOAM - 15 TO 25% SLOPES, NBC B 23B - DAVIDSON CLAY LOAM - 2 TO 7% SLOPES, HSG B 27C - DAVIDSON CLAY LOAM - 7 TO 15% SLOPES, HSG B 88 - UDORTHENTS, LOAMY - 2 TO 25% SLOPES, NBC B CRITICAL AREAS THE CRITICAL AREAS ON THE SITE ARE THE MANAGED AND PRESERVED SLOPES. CARE SHALL BE TAKEN TO CONTROL EROSION IN THESE AREAS. EROSION & SEDIMENT CONTROLS 1, CONSTRUCTION ENTRANCE: INSTALL AND MAINTAIN A CONSTRUCTION ENTRANCE, AS NECESSARY THAT MEETS THE REQUIREMENTS OF SHE. AND SPEC 3.02 AND CONFORMS WITH THE REQUIREMENTS OF THE EROSION & SEDIMENT CONTROL PLAN. 2. SILT FENCE: INSTALL AND MAINTAIN SILT FENCE THAT MEETS THE REQUIREMENTS OF STD. AND SPEC. 3.05. THIS SILT FENCE SHALL BE INSTALLED AS SHOWN ON THE EROSION & SEDIMENT CONTROL PLAN AND ACCOMPANYING DETAILS FOR THE PURPOSE OF INTERCEPTING SILT -LADEN RUNOFF BEFORE IT IS DISCHARGED FROM THE SITE. THE SILT FENCE SHALL BE INSPECTED AND MAINTAINED TO ENSURE CONTINUED PERFORMANCE, 3. RIGHT-OF-WAY DIVERSION: A RIDGE OF COMPACTED SOIL OR LOOSE GRAVEL CONSTRUCTED ACROSS A DISTURBED RIGHT-OF-WAY OR SIMILAR SLOPING AREA TO SHORTEN THE FLOW LENGTH WITHIN THE DISTURBED STRIP AND DIVERT THE RUNOFF TO A STABUZED QUIET EARTHEN DIVERSIONS ARE APPLICABLE WHERE THERE WILL BE LITTLE OR NO CONSTRUCTION TRAFFIC WITHIN THE RIGHT-OF-WAY, AND GRAVEL STRUCTURES ARE APPLICABLE WHERE VEHICULAR TRAFFIC MUST BE ACCOMMODATED. STD. AND SPEC. 3.11. 4. TEMPORARY SEEDING: TEMPORARY SEEDING SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN (7) DAYS TO DENUDED AREAS THAT MAY OR MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 14 DAYS. TEMPORARY SEEDING SHALL BE APPLIED IN CONFORMANCE WITH STD. AND SPEC. 131. 5. PERMANENT SEEDING: PERMANENT SEEDING SHALL BE APPLIED TO AREAS DELINEATED ON THESE PLANS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. PERMANENT SEEDING STABILIZES DISTURBED AREAS AND ENHANCES THE BEAUTY OF THE SITE. 6. MULCHING: APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE TO PREVENT EROSION AND FOSTER THE GROWTH OF VEGETATION. ORGANIC MULCHES (STRAW) HAVE BEEN FOUND TO BE THE MOST EFFECTIVE. 7. INLET PROTECTOR: INLET PROTECTION MEASURES AROUND THE NEW INLETS SHALL BE PROVIDED IN ACCORDANCE WITH STD. AND SPEC. 3.07. SILT FENCE, STRAW BALES OR TEMPORARY STONE APPLICATIONS SHALL BE APPLIED AS APPROPRIATE FOR CURRENT GRADE CONDITIONS. PERMANENT STABILIZATION AND SEQUENCE OF CONSTRUCTION THE FOLLOWING ARE THE PROPOSED MANAGEMENT STRATEGIES AND DETAILED SEQUENCE OF CONSTRUCTION: 1. INSTALL CONSTRUCTION ENTRANCE OFF ROAD B. TRUCKS SHALL BE CLEANED PRIOR TO LEAVING SITE. 2. INSTALL AND/OR MAINTAIN SILT FENCE, ROW DIVERSION, AND INLET PROTECTION AS SHOWN ON C3. 3. CONTACT THE ENGINEER AND ALBEMARLE COUNTY FOR INSPECTION AND APPROVAL OF ALL E&S CONTROL MEASURES. 4. UPON APPROVAL OF E&S CONTROL MEASURES, BEGIN BUILDING CONSTRUCTION. 5. MAINTAIN PERIMETER CONTROLS DURING CONSTRUCTION. 6. INSTALL ADDITIONAL CONTROL MEASURES AS SHOWN ON SHEET C4. 7. AS AREAS ARE BROUGHT TO GRADE, APPLY MULCHING, TEMPORARY SEEDING AND PERMANENT SEEDING. 8. WHEN SITE HAS ACHIEVED PERMANENT STABILIZATION, CONTACT ALBEMARLE COUNTY INSPECTOR TO PERFORM FINAL INSPECTION. 9. WHEN INSPECTOR HAS GRANTED APPROVAL, REMOVE PERIMETER CONTROLS. CONSTRUCTION MAINTENANCE THE FOLLOWING CONSTRUCTION MAINTENANCE PRACTICES SHALL BE FOLLOWED AT THE SITE. 1. ALL E&S CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAIN EVENT. ALL DEFICIENCIES IDENTIFIED DURING THESE INSPECTIONS SHALL BE CORRECTED AS SOON AS PRACTICABLE. 2, THE SILT FENCE BARRIER SHALL BE REGULARLY CHECKED FOR UNDERMINING, DETERIORATION OR SIGNIFICANT EROSION- SEDIMENT SHALL BE REMOVED AFTER EACH STORM EVENT AND WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES HALF THE HEIGHT OF THE CONTROL. 3. THE CONTRACTOR IS RESPONSIBLE FOR ADHERING TO ALL MAINTENANCE REQUIREMENTS SET FORTH IN THE CURRENT EDITION OF THE VIRGINIA SEDIMENT AND EROSION CONTROL MANUAL, OTHER APPLICABLE COMMONWEALTH OF VIRGINIA REGULATIONS AND THE PROJECT SPECIFICATIONS. 4. ALL SEEDED AREAS WILL BE REGULARLY CHECKED TO ENSURE THAT A GOOD STAND OF GRASS IS MAINTAINED. 5, AREAS WTH RIP -RAP SHOULD BE REGULARLY INSPECTED TO DETERMINE IF HIGH FLOWS HAVE DAMAGED THESE CONTROLS OR CAUSED EXCESSIVE SEDIMENT DEPOSITION, ALL AREAS SHALL BE MAINTAINED IN ACCORDANCE WITH THE REQUIREMENTS OF THIS E&S CONTROL PLAN. ENVIRONMENTAL CONTROLS 1. CONTRACTOR SHALL PROVIDE AND MAINTAIN ALL ENVIRONMENTAL CONTROL MEASURES SO AS TO COMPLY WITH LOCAL ORDINANCES, STATE AND FEDERAL LAWS AND REGULATIONS APPLICABLE TO WATER POLLUTION IN WATERS OF THE STATE AND IN INTERSTATE WATERS, 2. CONTRACTOR SHALL MINIMIZE THE POTENTIAL FOR AIR POLLUTION BY THE USE OF EMISSION CONTROL EQUIPMENT ON CONTRACTOR OPERATED EQUIPMENT, SHUT -DOWN OF MOTORIZED EQUIPMENT WHEN NOT IN USE, AND ACTIVELY CONTROLLING DUST EMISSIONS THROUGHOUT THE PROJECT. EROSION & SEDIMENT CONTROL PERMITTING CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL LOCAL AND STATE EROSION AND SEDIMENT CONTROL PERMITS AND MAINTAINING ALL EROSION AND SEDIMENT CONTROLS IN ACCORDANCE WITH THE PERMIT REQUIREMENTS GENERAL NOTES 1. THE INFORMATION AND DATA SHOWN OR INDICATED NTH RESPECT TO THE EXISTING UNDERGROUND UTILITIES AT OR CONTIGUOUS TO THE SITE ARE BASED ON INFORMATION AND DATA FURNISHED TO THE OWNER AND ENGINEER BY THE OWNERS OF SUCH UNDERGROUND FACILITIES OR OTHERS. THE OWNER OR ENGINEER SHALL NOT BE RESPONSIBLE FOR THE ACCURACY OR COMPLETENESS OF SUCH INFORMATION OR DATA. THE CONTRACTOR SHALL HAVE FULL RESPONSIBILITY FOR CONFIRMING THE ACCURACY OF THE DATA, FOR LOCATING ALL UNDERGROUND BLUFFS, FOR COORDINATION OF THE WORK WITH OWNERS OF SUCH UNDERGROUND UTILITIES DURING CONSTRUCTION, FOR THE SAFETY AND PROTECTION THEREOF AND REPAIRING ANY DAMAGE THERETO RESULTED FROM THE WORK. ALL OF THESE CONDITIONS SHALL BE MET AT NO ADDITIONAL COST TO THE OWNER. THE CONTRACTOR SHALL CONTACT "MISS UTILITIES" OF VIRGINIA AT 1-800-552-7001 PRIOR TO THE START OF WORK. 2- WHEN WORKING ADJACENT TO EXISTING STRUCTURES, POLES, UTILITIES, ETC., THE CONTRACTOR SHALL USE WHATEVER METHODS THAT ARE NECESSARY TO PROTECT STRUCTURES FROM DAMAGE. ANY DAMAGE CAUSED BY THE CONTRACTOR OR ITS SUBCONTRACTORS SHALL BE THE CONTRACTOR'S SOLE RESPONSIBILITY TO REPAIR OR REPLACE. THIS EXPENSE IS THE CONTRACTOR'S RESPONSIBILITY. 3. REPLACEMENT OR REPAIR OF DAMAGED STRUCTURES SHALL BE AT THE CONTRACTOR'S EXPENSE. 4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROTECTING ALL EXISTNG SITE STRUCTURES FROM DAMAGE AND COORDINATING WORK SO THAT THE OWNER CAN MAKE NECESSARY ARRANGEMENTS TO MODIFY/PROTECT EXISTING STRUCTURES FROM DAMAGES. 5. THE CONTRACTOR SHALL BE RESPONSIBLE FOR NOTIFYING ALL UTILITY OWNERS, ADJACENT LAND OWNERS WHOSE PROPERTY MAY BE IMPACTED AND THE VIRGINIA DEPARTMENT OF TRANSPORTATION PRIOR TO COMPLETING ANY OFF -SITE WORK, 6. CONTRACTOR SHALL NOTIFY AND COORDINATE ALL WORK INVOLVING EXISTING UTILITIES WITH UTILITY OWNERS, AT LEAST 72 HOURS PRIOR TO THE START OF CONSTRUCTION. 7. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR THE CONSTRUCTION INDUSTRY (29 CFR PART 1925). 8. THE CONTRACTOR SHALL VERIFY THE LOCATIONS OF ALL BOUNDARIES, BUILDINGS, VEGETATION, AND OTHER PERTINENT SITE ELEMENTS. CONTRACTOR SHALL IMMEDIATELY REPORT ANY DISCREPANCIES BETWEEN EXISTING CONDITIONS AND CONTRACT DOCUMENTS TO THE OWNER AND ENGINEER. 9. CONTRACTOR SHALL SUBMIT FOR THE APPROVAL OF THE OWNER SUBMITTALS OF ALL SPECIFIED MATERIALS LISTED IN THE PLANS, TO INCLUDE SHOP DRAWINGS, MANUFACTURER'S SPECIFICATIONS AND LABORATORY REPORTS. THE OWNER'S APPROVAL OF SUBMITTALS WILL BE GENERAL AND WILL NOT REUEVE THE CONTRACTOR FROM THE RESPONSIBILITY OF ADHERENCE TO THE CONTRACT AND FOR ANY ERROR THAT MAY EXIST, 10. CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL NECESSARY PERMITS, INSPECTIONS, BONDS AND OTHER RELATED ITEMS IN ACCORDANCE WITH LOCAL AND STATE POLICY. STORMWATER MANAGEMENT NARRATIVE: 1, STORMWATER MANGAGEMENT WAS DESIGNED UNDER WPO 201800088, ALL CONCENTRATED ONSITE RUNOFF SHALL BE ROUTED INTO CHANNELS AT RATES THAT COMPLY WITH VA TYPE 11C SWM REULATIONS AS THE SITE WAS GRANDFATHERED INTO A TYPE IIC SWM PERMIT. 2, WATER QUANTITY WAS ADDRESSED PER 9VAC25-870-97&98 (TYPE IIC BEGS). AT EACH POINT OF ANALYSIS, THE POSTDEVELOPMENT 2-YR AND 10-YR PEAK RUNOFF IS LESS THAN THE PREDEV PEAK RUNOFF. 3. WATER QUALITY WAS ADDRESSED PER 9VAC25-870-96 (TYPE IIC BEGS) WITH THE PURCHASE OF 8,49 LEE OF PHOSPHOROUS NUTRIENT CREDITS TO SATISFY THE NUTRIENT LOAD REDUCTION AS SET FORTH BY THE DEQ IN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM. UNDERGROUND DETENTION MAINTENANCE NOTES: 1. ALL PROPERTIES WHICH RELEASE RUNOFF INTO THE UNDERGROUND DETENTION SHARE MAINTENANCE RESPONSIBILITY. ALL PROPERTY OWNER SHALL CONTRIBUTE TO THE FOLLOWING MAINTENANCE ITEMS: 2. INSPECT THE 3 TRASH SCREENS AT DETENTION INLET AREAS TWICE PER YEAR, IN THE SUMMER AND IN THE WINTER. CLEAN OUT DEBRIS WITH VAC -TRUCK DURING INSPECTION. REPAIR SCREENS IF NEEDED. 3. INSPECT WEIR PLATE ORIFICES, TRASH RACKS, AND WELDS ANNUALLY. REMEDY ANY CLOGS OR FAILURES, AND REPLACE ORIFICE TRASH RACKS IF NEEDED, U. INSPECT GENERAL SYSTEM DEBRIS ACCUMULATION ONCE EVERY 2 YEARS. IF DEBRIS OR SEDIMENT IS NOTICED, CLEAN OUT SYSTEM WITH A VAC -TRUCK USING ACCESS RISERS. MINIMUM STANDARDS (MSI: All applicable Virginia Erosion and Sediment Control Regulations and Minimum Standards shall be adhered to during all phases of construction. These include, but are not limited to the following: 1. STABILIZATION OF DENUDED AREAS: Permanent or temporary soil stabilization shall be applied to bore areas within s n days after final grade is ached o any portion of the esite. Temporary soil stabilization shall be applied with n s n days to denuded s that may not be at final grade, but will r ne dormant o undisturbed for longer than 7 days. Permanent estabilization shall be applied at areas that are to be left dormant for more than 30 days. 2.STABILIZATION OF SOIL STOCKPILES: During construction of the project, soil stockpiles shall be stabilized o protected with sediment trapping ma sib The applicant is responle for temporary protection and permanent stabilization of all soil stockpiles on site as well as soil Intentionally transported from the project site. A PERMANENT VEGETATIVE COVER A permanent vegetative over shall be established on denuded are not otherwise perm.. en toy stabilized. Permanent vegetation shall not be considers, established until a ground c s achieve that, in the opinion of the county Inspector, is uniform and mature enough to survive to inhibit 4.7IMING & STABILIZATION OF SILT TRAPPING MEASURES: Sediment basins and traps, perimeter dikes, sediment barriers and other moc-res intended to trap sediment shall be constructed as a first step In any landdisturbing activity and shall be made functional before upslops land disturbance takes place. 5.STABILIZATION OF EARTHEN STRUCTURES: Stabilization mesare, net be applied to earthen structures such as dams, dikes and diversions immediately after installation. 6.SEDIMENT TRAPS AND BASINS: A .mpr s greater . sock ent basin shall control surface runoff from disturbed areas that is ised of flow from drains eater than equal to three acres. r The sediment basin shall be designed and constructed to accommodate the anticipated sediment loading for the land disturbing aotivity. The o device or system device Shall take into a or - flowing the total drainage area flowing through the disturbed area to be served by the basin. 7. CUT AND FILL SLOPES: Cut and fill slopes shall be designed and constructed In a manner that will m Slopes that are found to be eroding e vely within minimize permanent stabilization shall be provided with sa�dditional slope stabilizing measures until the problem is corrected. 8. CONCENTRATED RUN-OFF DOWN CUT OR FILL SLOPES: Concentrated runoff shall not How down cut or fill slopes unless contained within an accurate temporary or permanent channel, flume, or slope drain structure. 9. WATER SEEPS FROM A SLOPE FACE: Whenever water seeps from a slope face, adequate drainage or other Protection shall be provided. 1O.STORM SEWER INLET PROTECTION: All storm s e inlets that a made operable during construction shall be p"too too sothat sedian-trladen water cannot enter the conveyance erwise system without first being filtered or othtreated to remove sediment. 11. STABILIZATION OF OUTLETS: Before newly c nstructed st,rmw,t,r conveyance channels are made operational, adequate outlet protection and any required temporary or permanent channel lining shall be installed in bath the conveyance ch.... I and receiving channel. 12.WORK IN LIVE WATERCOURSES: When work in a live watercourse is performed, precautions shall be token tom encroachment, control sediment transport and stabilize the work a to the geatest extent possible during construction. N... rodihis material shall be used for the construction of causeways and cofferdams. Earthen fill may be used for the e structures if arm...d by n.nerodlble cover materials. 13.CROSSING A LIVE WATERCOURSE: When a live watercourse must be crossed by construction vehicles more than twice In any s month period, atemporary stream crossing constructed of ...erodible materials shall be provided. 14.APPLICABLE REGULATIONS: All applicable federal, state and local regulations pertaining to working. in or crossing live watercourses shall be met. 15STABILIZATIONOF BED AND BANKS The bed and banks of a watercourse shall be stabilized Immediately after work in the watercourse Is completed. 16.UNDERGROUND UTILITIES: Underground utilities shall be installed in accordance with the following standards a addition to other criteria: o.No more than 500 linear feet of trench may be opened at one time. b.Evaavated material shall be placed on the uphill side of trenches c.Effluent for dewatering alerations shall be filtered or passed through approved sediment trapping device, or both, and dischargedmanner that does not adversely affect flowing streams or offsite property. d.Material used for backfilling trenches shall bs properly compacted in order to minimize erosion and promote stabilization. e- Restabilizatior shall be accomplished In accordance with theseregulations. I. Applicable safety regulations shall be complied with. 17.CONSTRUCTION ACCESS ROU TES. Where can coon vehicle a outes intersect paved public roads, provisions shall be made to minimize r the transport of sediment by vehicular tracking onto paved surfaces. Where sediment is transported on to a public road surface, the road shall be cleaned thoroughly at the end of each day, Sediment shall be removed by shoveling . sweeping and transported to a sediment cantrol disposal a Streetwashingshall be allowed only after sediment is removed in this am This provision shall apply to individual lots as well as to larger land disturbing activities. 18-TEMPORARY E&S CONTROL MEASURE REMOVAL: Alem l tporory e and sediment control measures shall be removed within 30 days after final site stabilization o after temporary measures are o longer needed, unless otherwise authorized by the local program authority. Trapped sediment and the disturbed sail areas resulting from the disposition of temporory m res sholl be permanently stobilid to prevent further erosion and sediment su ze 19.ADEQUACY OF RECEIVING CHANNELS: Properties and waterways downstream from the development site shall be protected from sediment deposition, e and damage, due to in volume velocity and peak flow rateso of •storm water runoff far then stated frlequenay storm of 24-hour duration. / TMP 78-6 SEQUENCE OF CONSTRUCTION - PHASE 1 � ` 0 o MALLOY VII— 1. MASS GRADING OF THE SITE IS MOSTLY COMPLETED. GRADES ARE fV / RICHMOND RD LLC APPROXIMATELY AS SHOWN. l "w GY / DB 5090 PG 504 2. INSTALL CONSTRUCTION ENTRANCE OFF RD B. TRUCKS SHALL BE CLEANED �I PRIOR TO LEAVING SITE. w I 2. INSTALL AND/OR MAINTAIN SILT FENCE AND INLET PROTECTION AS SHOWN.i z i PLACE STONE IN PARKING PAD AREA FOR CONSTRUCTION ROAD p / / V V v STABILIZATION AS SOON AS POSSIBLE. //' //' 83 Al uMITs \ T M�. G�T § NG ESMT 3. CONTACT THE ENGINEER AND ALBEMARLE COUNTY FOR INSPECTION AND APYRQ'X. /OCA ION 1 5 ES T I , OF\DISTURBANCE I 1 I D 4553 P� 473- $6 '.� C, f / / / \ APPROVAL OF ALL E&S CONTROL MEASURES. FE ECRAGAcO of v�HGNE & 1 \ \ 'I a - 4. UPON APPROVAL OF E&S CONTROL MEASURES, BEGIN SITE WORK. 1 L L���� osl3�s a ,,��.,���, - �t���-, r �� �' _ v f _ 5. MAINTAIN PERIMETER CONTROLS DURING CONSTRUCTION. ,, f f, i—- - --_--- ` I ! ' 4' q E h - — -----_ - ---- - , , 3 , DETECT , �� -- --- n \ z , 7 , M I II IE�IS 3 ��� CR C NOTE. ALL PIPES & �� I - s=t vy I INLETS EXCEPT FOR D1 J ' ' �i o EXISTINGv � I • R • , ��• / , , SHIMP 5 a I I & D2, ARE EXISTING.yysia3 DERCRouND �cs o REVti�D TMPa126 EC-2 MATTING - LETS TIUN- SEE 7 �`� �V A� SEE WP0201800088 IP w \ l IhF020180008k ` \ \ \ ALONG SLOPE A, ` `� A A fvI �v REVIS� TMP 78-v5'A 11.78 AG wr& FLkc1` p v PA LC I oxnl " N Iv I `78-58G1 88 AC \ V► V `• `� ` A �v D Nl , vPAbB -43�$I I PG 684 NTOPS PARTNERS LLC�I DB \5275 PG'2�9 C ca (� NOTE: ALL PIPES & V I I I �� V �e v/ / INLETS, EXCEPT FOR D1 F D2, ARE EXISTING SEE �rep WP0201800088 IN=aGO. INV � CKPILE ARCH ` BTQ - \ I III �I STABN¢Ewl1fi ---- -�- --�-�— \ - --- W \ ` \ `. `� /' I Si STONE I V A CS v v. A -� DEE� P 0 AR I / I ` of o f \ \ - \AW\�rw9j�wPANTOPS ORE 38I LC )t—x k WAY ysw —w w w wG, �w I v Jf AT&T RAG 8' DEEP PER SONAR /x % IN p\ V' �� A I\ � 283 AC LIMITS � --- --- — � A OF DISTURBANCE r � \ O `,���� �� ! I��, °I I �� `.v REALISED T P �� - -- -- --s s �6 Ci REVISED-- a ti 9 NSF ♦ I / 8-5E-T.-11- ------ ---------- PA TOI 'In I ELF - 78-5B 0.71 A do ��y �� AT�T RAc / q /` ° \ TORAGE ZZ -- ----- - \ -LC ------------------ � SF 3 j - - �_�B 5285 PG �87 __-_- PG 684 I, I t, 3, a _ _ —��� - _ GRADING ON TMP V `� - _ --_ --_ a�� % 9p IP 78-5E MAY VARY - _ \ r 2 `_ T \ I REF. WED --___ --_ Iz IS 2020-00022 - - --_ O \ �� \ ` / , PAVEMENT `_ _. _ — .3]a — �` + �s`� I\ �s _-INSTALLED _ — — \Y� \ \ \ 7� W \ `�--- \ \\'111 III -6. _--_-- _ -- —-- — —_ — TEMP. CONSTRUCTION —— ESMT +\ \ 111 + 1 TMP, 7 -5C --,v DB 5147 PG 228 \1 1+ II\I 1 1 v 1 FLOW TQN IN T LL �'i +1v11v'v111v \ \ I \ 5 - \ 1 o �► j \3 DB 1471, G 2 8 L J 1\\\\ \\ 11 c2 An a^asiw 1 1 M.H. WINDING- ���� RIVER \ I LANE 9 a .\ I 30 0 30 60 90 Scale: 1-30' FIBER-OPTIC CABLE MARKER } z �+ 0 0 J LL Z Q g0� a � m U J W � Q Date 04 15 2020 Seale 1 "=30' Sheet No. C3 OF 5 He No. 1 � n / TMP 78-6 SEQUENCE OF CONSTRUCTION - PHASE 2 o o MALLOY VII— 1. MAINTAIN PERIMETER CONTROLS. INSTALL NEW CONTROL MEASURES AS z / RICHMOND RD LLC SHOWN. v w GY / DB 5090 PG 504 2. AS STORM STRUCTURES ARE CONSTRUCTED, INSTALL INLET PROTECTION. z 4. INSTALL SILT FENCE ALONG FINISHED CURB AND SIDEWALK WHERE ANY FINAL w FINE GRADING ACTIVITY OCCURS, w a 5. SITE MUST BE FULLY STABILIZED BEFORE REMOVAL OF SILT FENCING. W o 6. AS AREAS ARE BROUGHT TO GRADE, APPLY MULCHING, TEMPORARY SEEDING a // y z J� AND PERMANENT SEEDING. / / m Low MAINTENANCE I I I II 4 GROUND CQVER `\o 1 Ei \-- — — — vv vv vv - / LDW MAINTEN — IV cRoupio co e 1 I � � \ \ . M �C m n� m _ \ Li WAWA BUILDING �� > �� o®. , .��•,, ��®,� r 4 r�L Q l �� / A A v , ----� y I SHIMP � I I 1 � �, NOTE: PROVIDE LOW 1 I It,�` MAINTENANCE GROUND �. sov COVER ON ALL SLOPES �7 / I• u , I I a 26 w¢• STEEPER THAN 3 1 I HOLIDAY INN 01 PC e F OO e ,v v v v v I �� �• y �\ sEEEDETAiI 1D, Ca. �I I ! / \ v► . \ � i � \ \ \ I i � EXPRESS HOTEL �► '� Iv , I BUILDING cs / , I v I I L— �v �v I .. \ Cow MAm TeNAN I I I I \ `\ •\ \ \ RouNc rovER I I I I \ I \\I '\ F / �\ .a ..1 / I Q E . v �v vvv v v �� � / I , 1 I L• � ��\ v �I, i � _A C. B4 �� '� �; —�— —w — — — — — .w—�� � o — 4 �TO�w WAY wl=w IP PANPS CORN ' w w I i 1 y o \ O/ \ � \\\ \\\\ :t ♦ J , � _ --ram-- '� iA _ _\ �\ \ 1/ _ / ����d�`6�98����/ ��v���.wA�v�♦v �owMAIN�NANCE' _ �� `v ���1 ^t.:-- — — — s y 9 F % v �` v . .♦ ceouNo covER ----- > ------ a t ------ �/ ti 6 F `� `�� vv `�� v♦ a I� SELF STORAGE A�OgTy �� \\ \ �\ ♦ aa P A — ---- -- BUILDING — — :\ `\—\ __----- ----- \�\ I _ _ ----- ---- __� 9 v` A C5� — _ — — — — _ _ _ -- �� — Z vat IP �\ \ \ ti � ___ _ � \ �/I \O �� `w v C _ _— — -- _ _------_ vvv A •� v zz \ \•ti ; -- -, \_ — __ _ ____—_� ; 1 � III z,. P `v _ -__ \�� \v� TMP`v7 —5C ". �1► �v v` �� — ,_ A �`. FLOW 12v8 STONY POIN`T LLG o �►� 3 �`v \ DB 5147`I G 228 I I I� , M� \ \it \ I I M.H. I ', WINDING — RIVER r LANE a `\ 30 0 30 60 90 Scale: 1-30' , z Z 0 J LL Z Q g0� a � m U J W � Q Date SO4 15 2020 1 "=30' Sheet No. C4 OF 5 File No. 1 ? n CONSTRUCTION OF A SILT FENCE (WITH WIRE SUPPORT) 1. SET POSTS AND EXCAVATE A 4'X4" ]. STAPLE WIRE FENCING To THE POSTS: TRENCH UPSLOPE ALONG THE UNE OF POSLLS FLOW 4. BACKHLL AND COMPACT THE EXCAVATED SOIL. EXTENSION OF FABRIC AND WIRE INTO THE TRENCH, ;RLnRJFABRIC IRE nSILTFENCE (SF) W. WIRE SUPPORT CS Not To Scale TRIANGULAR BOARD FENCE '®' SNOW BOARD TRUNK ARMORING GRAVEL CURB INLET SEDIMENT FILTER III GRAVEL FILTER Ip• RUNOFF WATER WIRE MESH FILTERED WATER Cw III SEDIMENT III IIII 4 CONCRETE GUTTER IIII I1cl2l l�'lll � CURB INLET SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE PO DING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. • GRAVEL SHALL BE VDOT #3. #357 OR 5 COARSE AGGREGATE. 3 INLET PROCTION IP) C5 Not To Scale VDOT #1 — COARSE AGGREGATE TYPICAL GRAVEL STRUCTURE CORD FENCERIGHT OF WAY DIVERSION (RWD) C5 Not To Scale v CORRECT METHODS OF TREE FENCING %2"`%TREE PROTECTION FENCING C5 Not To seek 1992 335 TABLE 335-A ORGANIC MULCH MATERIALS AND APPLICATION RATES RATES: MULCHES. NOTES: Per AcrePer 1000 sq. ft. Straw or Hay 14 - 2 tons 70 - 90 lbs. Free from weeds and coarse (Minimum 2 matter. Must be anchored. tons for Spread with mulch blower winter cover) or by hand. Fiber Mulch Minimum 35 lbs. Do not use as mulch for 1500 lbs. winter cover or during hot, dry periods.` Apply as slurry. Cam Stalks 4 - 6 tons 195. - 275 lbs. Cut or shredded in 4-6" lengths. Air-dried. Do not use in fine turf areas. Apply with mulch blower or by hand. Wood Chips 4 - 6 tons 185 - 275 lbs. Free of coarse matter. Air- dried. Treat with 12 lbs nitrogen per ton. Do not use in fine turf areas. Apply with mulch blower, chip handler, or by hand. Bark Chips 50 - 70 w. 1-2 OIL. yds. Free of coarse matter. Air. or yds. dried. Do not use in fine Shredded turf areas. Apply with Bark mulch blower, chip handler, or by hand. ' When fiber mulch is the only available mulch during periods when straw should be used, apply at a minimum rate of 20001bs./ac. or 45 lbs./1000 sq. ft. Source: Va. DSWC 5 MULCHING MU C5 Not To Scale TABLE 3.39-A ADHESIVES USED FOR DUST CONTROL Water Application Dilution Type of Rate Adhesive (Adhesive: Water) Nozzle Gallons/Acre Anionic Asphalt Emulsion 7:1 Cause Spray 1,200 Latex Emulsion 12.5: I Fine Spray 235 Resin in Water 4:1 Fine Spiny 300 Acrylic Emulsion (Non -Traffic) 7:1 Coarse Spray 450 Acrylic Emulsion (Traffic) 3.5A Coarse Spray 350 %DUST CONTROL (DC) C5 Not To Soale TABLE 3.I1-C TEMPORARY SEEDING PLANT MATERIALS. SEEDING RATES, AND DATES r t3 SEEDING RATE NORTH` SOUTILE SPECIES PLANT CHARACTERISTICS Aem IOW R1 3l1 e Ono rll m v1s a115 a IIn LIS m 4IW ml sn bl Ivls cysaz a,;"a1 y w.fwmlW la.. ea l®. uw so lw.l za.. x - X un aP�r ..dwaa (•.a.. xeMel. RYE' z be� 110 lb.. x - x x um rorlw au aaeiea.. wbua t@stiLv umli �m W IM.) a. Tolww wM roE low LEr Wlha .IIb. - X - - X I.SNdaiWinl fien. MO be atldodm�w®er� ANNUAL RYEGRw55` flolium aatr:at�) 6Il Ib. I.- R - X % - X My be atlded m will mvxaue of moo eunds. WEEPING LOVEGRwSa ffaemIDas saca4/ XIape,moiY. May �'AT �•d'r°lope ins- Bale. M.y Iw ROREAN LESPEDE%A` 11�sn vdmda'sU a51ha. appo,. IM IEu X X - X % - Wnm wain anmol leaden. Tolsala acid uila.Mrybe arced m ®.a. ' NoMem Piedmont and Maunlain region See Pales 3.22-I and 3.22-2. E Sousaem Piedmont antl CoasMl Plun. • May be used u a coves crop It spun@ seeding. d May be used as a cover cmp wall fall siding. X May be Plantetl beswcen arce dates. - Mar mt ne ptamnd biwin dsnce Baler. TEMPORARY SEEDING (TS) C5 Not TD Scale TEMPORARY DIVERSION DIKE Compacted Soil 18•' m �FLow 4.5' min. DIVERSION DIKE (DD) CS Not To Scale PAVED CONSTRUCTION ENTRANCE STONE 70' MIN. CONSTRUCTION ACCESS 3" $M-2A ASPHALT TOP COURSE EXISTING 2X 29. PAVEMENT 6 MIN. 2 A AGGRfGArf BASE PROFILE STONE 70' MIN. CONSTRUCTION � ASPHALT PAVED ACCESS A Wp$HRACK 1 ! EXISTING 27. X PAVEMEM l2X 12' MIN.- -MUST EXTEND FULL WIDTH L—.-�A 1�`PO$ITNE DRAINAGE OF INGRESS AND EGRESS TO SEDIMENT :OPERATION TRAPPING DEVICE PLAN �12' MIN. PDBRNE DRAINAGE 2X TO SEDIMENT TRAPPING DEVICE FILTER CU0TrMftMg SECTION A —A A nuuilmlm water tap of 1 arch rout be husfaBeA with a nrinirmwu 1 inch ba8cock sWnoff valve supplying a wash hose with a diameter' of 1.5 inches for adequate coastaut pressure. wash water' m0si be cRnied away from the entrance to an approved seNlhlR area to rauove sedhneut. All setihneut sha0 be prevented from adaurs show dams, Ail nr walla coin seq. PAVED WASH RACK NO BCA:E PERMANENT SEEDING SPECIFICATIONS February 16 through April 30: Kentucky 31 Fescue — 128 Ibs/acre; Red Top Gross — 2 Ibs/ocre; Annual Rye — 20 Ibs/acre. May 1 through August 15: Kentucky 31 Fescue — 128 Ibs{acre; Red Top Grass — 2 Ibs/acre; Foxtail Millet — 20 Es/acre. Au gust 16 through October 31: Kentucky 31 Fescue — 128 Es/acre; Red Top Gross — 2 lbs/acre; Annual Rye — 20 Ibs/acre. November 1 through February 15: Kentucky 31 Fescue — 128 Ibs./acre; Red Top Grass — 2 lbs/acre; Winter Rye — 20 lbs/acre. MULCHING SPECIFICATIONS: Straw or hay at a rote of 2 tons/acre. Must be anchored. Spread with mulch blower or by hood. LIME AND FERTILIZER SPECIFICATIONS: Lime and fertilizer needs Ghould be determined by soil tests. Soil tarts may be preformed by the Cooperative Extension Service Soil Testing Laboratory at VPI&SU, or by a reputable commercial laboratory. Information concerning the Slate Soil Testing Laboratory Is available from CITY Extension Agento. Under unusual conditions where it is not possible to obtain a soil test, the following soil amendments will be applied: For Permanent Seeding: Seeded areas shall be limed at a rate of 2 tons per acre, and fertilized at a rate of 1,000 lbs. per acre of 10-20-10 (10 lbs. per 1,000 square feet) or equivalent. For Temporary Seen lnq: Seeded areas shall be limed at a rote of 2 tons per acre, and fertilized at a rate of 600 lbs. per acre of 10-20-10 (10 Us. per 1,000 square feet) or equivolen C. LOW MAINTENANCE GROUND COVER: SOUTHEAST NATIVE GRASS SEED MIX (AM ERICAN MEADOWS INC.) For slopes steeper than 3:1 grade, Mix the following seeds at 30 Ibs/acre VaCn: rg loin Wildrye (El —us virgin Las). Little Bluestein crass (Schizachyrium aopGriam), Parpl atop (TridanG flovua), eroomsadga (Andropogon virgintus), and Indian Gross (Sorgh estrum nutans). o � U . SHIMP Lic. .yy5183 P a[26 w¢- p� R+ `PSr011'AT. 1 W w Q� Z w> O J 0 Z O CJ L g� m W f� Q 04'15 2020 Scale 10 PERMANENT SEEDING (PS) C5 Not To Scale LU LL Cc Date < Sheet No. C5 OF 5 File No. 12.025 Section 5. Stormwater Management Plan THE SITE'S STORMWATER MANAGEMENT PLAN IS DETAILED IN VSMP PLAN WPO 201800088. WATER QUANITITY COMPLIANCE IS ACHIEVED BY THE UNDERGROUND DETENTION SYSTEM WHICH HAS BEEN INSTALLED. WATER QUALITY COMPLIANCE WAS ACHIEVED BY THE PURCHASE OF NUTRIENT CREDITS. CURRENT LAND DISTURBANCE PERMIT FOR THE SITE IS VAR I OE 170. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County PROJECT MANAGEMENT SHIMCIVIL ENGINEERING LAND PLANNING ENGI N EEKI *�Ga June 27, 2019 Mr. John Anderson Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: WPO 201800088 Pantops Corner VSMP Major Amendment Dear John, Enclosed is the stormwater calculation packet for Pantops Corner. The development property has an area of 6.67 acres and will improve an offsite right-of-way area of an additional 0.15 acres, bringing the applicable site area (also called the development area) to 6.82 acres. The proposed stormwater design meets the runoff requirements set forth in 9VAC25-870-96, 9VAC25-870-97, and 9VAC25-870-98, the VSMP Type IIC Stormwater Management regulations. This site is designed under the Type IIC regulations because it has an active permit that was approved under these regulations which is now being amended. The current county approval is WPO 201400028 and the current land disturbance permit is #VAR10E170. SWM Quantity 9VAC25-870-97 and 9VAC25-870-98 require that the 2-yr and 10-yr peak post -development site runoff at each channel not exceed the 2-yr and 10-yr peak pre -development runoff. We analyzed the areas within the development area for runoff compliance. To achieve post -development peak flow rates that do not exceed pre -development flow rates, the majority of the site runoff will be piped to an underground detention system consisting of 472 linear feet of 96" perforated CMP pipes embedded in #57 stone. This strategy allows site runoff at the two identified points of analysis (POA 1 & POA 2), to comply with 9VAC25-870-97 and 9VAC25-870-98. There is a 0.38 acre onsite area which does not drain to a point of analysis per 9VAC25-870-97 and 9VAC25-870-98. This area drains to inlets along Route 250 and outlets directly into the Rivanna River. We analyzed this area Per 9VAC25-840-40, sections 19-b(1) & 19-b(2)(c), which states "The applicant shall demonstrate that the total drainage area to the point of analysis within the channel is 100 times greater than the contributing drainage area of the project in question... Pipes and storm sewer systems shall be analyzed by the use of a 10-year storm to verify that stormwater will be contained within the pipe or system." This requires storm sewer capacity analysis to the point where the added drainage from the site is 11100 of the total drainage area. The total drainage area at the point of discharge into the Rivanna River is thousands of acres and qualifies as the limits of analysis due as it is over 100x larger than the added 0.38 acre drainage area. To demonstrate storm sewer capacity to this point, we demonstrated that the Rte. 250 storm sewer can contain the 10-year storm utilizing the VDOT LD-347 hydraulic grade line analysis. This shows that the 10-year storm is contained within the Rte. 250 storm sewer, so the 0.38 acres complies with 9VAC25-840-40-19 for channel flooding and protection. SWM Quality To achieve nutrient treatment compliance per 9VAC25-870-96, we analyzed the land cover changes for the development area and input the post -development land cover into the DCR Appendix 5D worksheets. The worksheets show that an amount of 8.49 lbs. of phosphorous removal is required for this development. An amount of 8.49 lbs. of phosphorous credits will be purchased from a VADEQ-approved Nutrient Bank to satisfy this requirement. Site Runoff Quantity Totals Storm Events and Associated Peak Runoff Rates Pre-Dev Post-Dev POA 1 POA 1 Pre-Dev Post-Dev POA 2 POA 2 2-Year 4.09 cfs 4.03 cfs 1.20 1.01 cfs 10-Year 12.32 cfs 12.18 cfs 3.44 2.37 cfs If you have any questions please do not hesitate to contact me at: Justin@shimp-engineering.com or by phone at 434-299-9843. PANTOPS CORNER PRE-DEV POA DRAINAGE MAP / �/ / /������ �Jr/ j/�•�/�////% /�� , 1 / i �` i \1 `\I +` I 11 I i 1\\`\ \ \, \-= \- 420 %III \\V 4 /i / / / / / / � � / / / \ It -_ / !.-� ^ I 402 \ \`\ \ 11I I �� I\ \\\\\ \\ \ \\ 1\ \\ \\ \ ` \\ \+ T.M. 78-5A TO POA 1 5.25 AC TOTAL �\ I gO� \i25 AC IMP �7118QI 58G1 \ t` POA 1�_ C I / T\` \ \` - \`. `\ �\ ,> 0.46 AC TOT \\ \ \ _ _ _ \\ \ \ �37 — ---- \ - � T.M. 7�=�6--- -- -- _-------- --TO POA . _ -=_- -_ 3a as -----= 1.15 AC TOTALi--�- -- -- --- \ , \ - - _ - 0.10 AC IMP — — —370- _ T.M. 78-5F \\ :�\ �� T.M. 78-5E\I'\\ ✓- \\ \ 1 1 T.M. 78-5 O— I 11101� 1 347.11 �\ I I \ POA 2 I\ c -� 0- \ 0 --1 z m 0 - — — , o I ��- . I 62 80 0 80 160 240 \ I 356. \ \ \ Scale: 1 =80 I H. LAND COVER DATA TO POA 1: WOODS HSG B: 0.72 AC TURF HSG B: 4.28 AC IMPERVIOUS: 0.25 AC TOTAL: 5.25 AC TO POA 2: WOODS HSG B: 0.39 AC TURF HSG B: 0.66 AC IMPERVIOUS: 0.10 AC TOTAL: 1.15 AC Note: 0.46 Acre Predev Area to Rte 250 is included in Rte 250 Drainage Calculations and not analyzed with a POA. Refer to note on Postdev POA Drainage Map. HYDROLOGIC DATA TO POA 1: ToC= 13.2 min Q2-YR= 4.09 cfs Q10-YR= 12.32 cfs Q100-YR= 31.73 cfs TO POA 2: ToC= 6.9 min Q2-YR= 1.20 cfs Q10-YR= 3.44 cfs Q100-YR= 8.64 cfs 61 PREDEV Type/1 24-hr 2-YR Rainfall=3.66" Prepared by Shimp Engineering, P.C. Printed 5/31/2019 HydroCAD® 9.10 s/n 07054 © 2011 HydroCAD Software Solutions LLC Page 2 Time span=5.00-48.00 hrs, dt=0.05 hrs, 861 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Predev DATo POA 1 Runoff Area=5.250 ac 4.76% Impervious Runoff Depth=0.69" Tc=13.2 min CN=62 Runoff=4.09 cfs 0.303 of Subcatchment 2S: Predev DA to POA 2 Runoff Area=1.150 ac 8.70% Impervious Runoff Depth=0.69" Tc=6.9 min CN=62 Runoff=1.20 cfs 0.066 of Total Runoff Area = 6.400 ac Runoff Volume = 0.369 of Average Runoff Depth = 0.69" 94.53% Pervious = 6.050 ac 5.47% Impervious = 0.350 ac PREDEV Type 1124-hr 10-YR Rainfall=5.54" Prepared by Shimp Engineering, P.C. Printed 5/31/2019 HydroCAD® 9.10 s/n 07054 © 2011 HydroCAD Software Solutions LLC Page 5 Time span=5.00-48.00 hrs, dt=0.05 hrs, 861 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Predev DATo POA 1 Runoff Area=5.250 ac 4.76% Impervious Runoff Depth=1.78" Tc=13.2 min CN=62 Runoff=12.32 cfs 0.780 of Subcatchment 2S: Predev DA to POA 2 Runoff Area=1.150 ac 8.70% Impervious Runoff Depth=1.78" Tc=6.9 min CN=62 Runoff=3.44 cfs 0.171 of Total Runoff Area = 6.400 ac Runoff Volume = 0.951 of Average Runoff Depth = 1.78" 94.53% Pervious = 6.050 ac 5.47% Impervious = 0.350 ac im PANTOPS CORNER Time of Concentration Calculations PREDEV TOC: POA 1 55 ft overland flow 405 ft s. c. flow -woods 590 ft Channel PREDEV TOC: POA 2 50 ft overland flow 297 ft s. c. flow -woods 195 ft Channel - Pipe 29.1% slope 0.35 C-value 5.5 min 3.5% slope 1.3 fps velocity 5.2 min. 64 ft height 2.5 min. TOC= 13.2 min. 24.0% slope 0.35 C-value 5.5 min 6.1% slope 4.7 fps velocity 1.1 min. 9 ft height 0.3 min. TOC= 6.9 min. Seelye Chart NEH Figure 15-4 Kirpich Chart Seelye Chart NEH Figure 15-4 Kirpich Chart 16 i, ` v� / 1 l A N TO P S C 0 R N TE R T ... N DRAINAGE MAP 1 w - 4 — -- __ -- - - - --s ✓ o - --- __ - _- - -- I E i i / / / e � !` �8'• 92 �-- P it � � � -- — — _ _— -- — — �� / ( d — �_��uKmp.1DA" C IMP i ...INLET B AAC CRE j r h .� % ✓ < " r // ( ;AfiCRES,/ 1-' j! 1 p W / A EA TO 62 / fI 2JAF.ES j b .Afr-IMP'' .' j iii 0 — ;�' q:59 ACRES :24 AC IPy_,, �I ' cr—----r-- ---11 �� .55 AC IMP%' o ii i�, 1'♦•c,`` � II I u 1 I '�� � I ` �'� i / + li'i Q ���_ • — 1 ! , "® 'mow , 1 �� s �" . r2 . , �,,I W N C n III �� =_�%, �'-�r/ -•,--•-�-• � �������/� / � �s .i� ��-� �%��i i ,� � AREA TO B7 � m 1.16 ACRES � � I ® 11 I� I I I , / �! i -a "� ur I• �J ._�I k ti�93 AC IMP 11 • I I — I', �� I I � . P !/ In,��-sue 1 Pd ARE ATOA10a I � ! , ^ _ RE� Xi/' !/ , P` I rf'.Eh TO A i 3 "d_� _�i_JJ � d i +, � � ° L�__..� / /�% /' �� I� 0]` x IMP �.. �.� =- ---- -- -�r� ARE A TO B1a ' 'I--��; �__-__�� �, �,�,r:�.., � v �� .,�� r .�� ,.0 iiI J . °.._ ) `$ % it w( — '- � U.59 AC l'' ----- v,�� P.��a U.4�\s4CRE$ II IL10 .� ice,1121) Q:3� AC IMP ✓� ii a ARTO A8A ri` ------------------ EA_----' - ��� / II o '_ --- -- ---'-- -- REATf�z�£ -. �-'-- - o.o�ACRES V �1 JI I-1 ARE t`O _ __ _ rTO INLET A13 Vvv` v v` ����- a ✓J 0.27,ACRES 1�0.25 A�=—__�� o.oeAClnta---_�� I ��� f erg, - Di 0.22 AC IMP 1,6 A&IMP o-/ �. /� '._ �1 / %. 0.05/AC IMP / �J JJ AREA TO A6 p •.. - ' - - - -1- \vV 0.31 ACRES; \ � ♦----------- _ _gym_ __— \ \ \ \ \ \ \ \ \ \. \\ _ `� r__—J. �� 0.28 AC IMP / )'l � \ , �> � � '� t�Fr�AIR dr a � @ � �� -- _ - • .. _ I i I J \ \� AV Avv v� A `� vv `v ` `�/ vv Vv vv v\ v v v v F. AR f'll�"1y AX -- - —�` -390 0.09�C II i--_-_---- , >♦o /'� =I n-" `i I ° j/ EA A11C .� v \ v \ . �. `, , , ��� i ♦Fax I 1 sI °'� PA rr�15111 . � 0.14 A S � I 0.13 Ai 390 v\ �\ vvA ♦�` �`�+, ✓� �'�'`. , / i i AREA TO A9Z: `:, `ai 0.40AGRES __ 1 o I \\ —ems_--- Av`v ------ 0` \ i MP\��jQ C2 INSET DETAIL \ ` A O a Iron ----- - �I r 17 AC MP �G4 Ir � — 0 i /_ 1 I ! IL AREA T I I0.69 AC _ `� ■ \ i I i ' `• 0.53 AC IMP ♦{; \■ I `\ "360— ISEE INSET DETAIL, -j (THIS PAGE 60 0 60 120 180�� \ (" Scale: 1"=60' • \`• G 22 `.�`AREA TO EX C2 ` �, - ol POA' , �777— POA 1 BYPA 0.35 AC TO \ 0.01ACI An I J � �} h `\ J / \`\ \ \ fir► \ \� .` \ - vy �A POA 1 B v S 23�° `\\ 0.04 AC -TO X `03 AC IMPS " \\\ \"A 80 0 80 0001 i0 � il'i lull On .0 F®r Orr "n, 9 sue,,. ►� �i► tom.; .� , ���� !� I I , \ \It i1 1�, 11 \ PIDA 1 _ 0.38 ,l it i \\V I 1 PANTOPS CORNTER POSTDEV POA DRAINAGE MAP ONSITE POSTDEV DRAINAGE INFO TO POA 1: TO DETENTION 4.72 AC IMPERVIOUS 0.84 AC TURF HSG B 5.56 AC TOTAL BYPASS 1 0.01 AC IMPERVIOUS 0.34 AC WOODS HSG B 0.35 AC TOTAL BYPASS 2 0.03 AC IMPERVIOUS 0.01 AC TURF HSG B 0.04 AC TOTAL TO POA 2: 0.13 AC IMPERVIOUS 0.39 AC TURF HSG B 0.52 AC TOTAL Note: the 0.38 Acre Site Area which flows to Rte 250 inlets discharges into the Rivanna River and meets the limits of analysis per 9VAC25-840-40, 19—b(1) & 19—b(2)(c). See Rte 250 Inlet Analysis which shows the adequacy of the storm drains to the point of discharge into the Rivanna River. HYDROLOGIC DATA POA 1 Assumed ToC to Detention = 6.0 min ---- -' Assumed Bypass ToC = 6.0 min Q2-YR= 4.03 cfs _ Q10-YR= 12.18 cfs Q100-YR= 73.28 cfs L POA 2 Assumed ToC = 5.0 min Q2-YR= 1.01 cfs Q10-YR= 2.37 cfs \- 0100-YR= 5.31 cfs 23 1S Postdev nsite to 3S Dete tion Bypass 1 2P (4S Dete tion Bypass 2 5L Subcat Reach Pon Link (6S Postdev O site to POA 2 7L POA 2 24 POSTDEV Type/1 24-hr 2-YR Rainfall=3.66" Prepared by Shimp Engineering, P.C. Printed 5/31/2019 HydroCAD® 9.10 s/n 07054 © 2011 HydroCAD Software Solutions LLC Page 2 Time span=0.00-72.00 hrs, dt=0.01 hrs, 7201 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Postdev Onsite to Runoff Area=5.560 ac 84.89% Impervious Runoff Depth=2.79" Tc=6.0 min CN=92 Runoff=25.97 cfs 1.293 of Pond 2P: Detention Peak Elev=359.24' Storage=0.527 of Inflow=25.97 cfs 1.293 of Outflow=3.95 cfs 1.293 of Subcatchment 3S: Bypass 1 Runoff Area=0.350 ac 2.86% Impervious Runoff Depth=0.44" Tc=6.0 min CN=56 Runoff=0.20 cfs 0.013 of Subcatchment 4S: Bypass 2 Runoff Area=0.040 ac 75.00% Impervious Runoff Depth=2.51" Tc=6.0 min CN=89 Runoff=0.17 cfs 0.008 of Link 5L: POA 1 Inflow=4.03 cfs 1.314 of Primary=4.03 cfs 1.314 of Subcatchment 6S: Postdev Onsite to POA 2 Runoff Area=0.560 ac 25.00% Impervious Runoff Depth=1.00" Tc=5.0 min CN=68 Runoff=1.01 cfs 0.046 of Link 7L: POA 2 Inflow=1.01 cfs 0.046 of Primary=1.01 cfs 0.046 of Total Runoff Area = 6.510 ac Runoff Volume = 1.360 of Average Runoff Depth = 2.51" 24.73% Pervious = 1.610 ac 75.27% Impervious = 4.900 ac 25 POSTDEV Type 1124-hr 10-YR Rainfall=5.54" Prepared by Shimp Engineering, P.C. Printed 5/31/2019 HydroCAD® 9.10 s/n 07054 © 2011 HydroCAD Software Solutions LLC Page 11 Time span=0.00-72.00 hrs, dt=0.01 hrs, 7201 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Postdev Onsite to Runoff Area=5.560 ac 84.89% Impervious Runoff Depth=4.62" Tc=6.0 min CN=92 Runoff=41.55 cfs 2.140 of Pond 2P: Detention Peak Elev=362.85' Storage=0.834 of Inflow=41.55 cfs 2.140 of Outflow=11.81 cfs 2.140 of Subcatchment 3S: Bypass 1 Runoff Area=0.350 ac 2.86% Impervious Runoff Depth=1.33" Tc=6.0 min CN=56 Runoff=0.80 cfs 0.039 of Subcatchment 4S: Bypass 2 Runoff Area=0.040 ac 75.00% Impervious Runoff Depth=4.29" Tc=6.0 min CN=89 Runoff=0.29 cfs 0.014 of Link 5L: POA 1 Inflow=12.18 cfs 2.193 of Primary=12.18 cfs 2.193 of Subcatchment 6S: Postdev Onsite to POA 2 Runoff Area=0.560 ac 25.00% Impervious Runoff Depth=2.27" Tc=5.0 min CN=68 Runoff=2.37 cfs 0.106 of Link 7L: POA 2 Inflow=2.37 cfs 0.106 of Primary=2.37 cfs 0.106 of Total Runoff Area = 6.510 ac Runoff Volume = 2.299 of Average Runoff Depth = 4.24" 24.73% Pervious = 1.610 ac 75.27% Impervious = 4.900 ac 34 Pantops Corner LD-204 Stormwater Inlet Computations Inlets on Grade Only Sag Inlets Only ° m° co Z o E > y o ° a ° ❑ u) °T °- E o U Y L m V) y X is c°i c� c c m U F ° > m 2 Q- W m -a -2 2 a U) _= c i ci U = C3 o a � 0 a 0 F U) o o a o i o 2i 1 2 3 4 5 6 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 ft ac in/hr) (cfs) cfs) (cfs) ('/' '/') '/') ft ft) (cfs) (cfs) (ft ft ft D2 DI-313 10 1.66 0.69 1.15 4.0 4.62 0.00 4.62 0.013 0.030 0.020 0.08 0.27 0.5 0.54 7.57 7.5 8.65 0.00 8.65 0.41 0.5 0.82 14.60 A13 DI-313 8 0.08 0.76 0.06 4.0 0.24 0.00 0.24 0.013 0.061 0.020 0.08 1.20 0.14 100.0% 0.24 0.00 7.5 0.45 0.00 0.45 1.52 0.15 95.9 % 0.43 0.02 Al2 DI-313 8 0.07 0.74 0.05 4.0 0.21 0.00 0.21 0.013 0.061 0.020 0.08 1.14 0.14 100.0% 0.21 0.00 7.5 0.39 0.02 0.40 0.08 1.45 0.15 100.0% 0.39 0.00 A11 C DI-313 4 0.14 0.83 0.12 4.0 0.46 0.00 0.46 0.013 0.061 0.020 0.08 0.09 0.5 0.18 3.10 7.5 0.87 0.00 0.87 0.08 0.14 0.5 0.27 3.97 A11B DI-3B 8 0.24 0.77 0.18 4.0 0.74 0.00 0.74 0.013 0.061 0.020 0.08 0.09 0.5 0.18 5.00 7.5 1.38 0.00 1.38 0.08 0.14 0.5 0.28 6.32 At DI-3B 14 0.34 0.81 0.27 4.0 1.10 0.00 1.10 0.013 0.061 0.020 0.08 2.29 0.17 100.0% 1.10 0.00 7.5 2.06 0.00 2.06 4.28 0.21 100.0% 2.06 0.00 A10 DI-313 10 0.06 0.78 0.04 4.0 0.18 0.00 0.18 0.013 0.067 0.020 0.08 1.02 0.14 100.0% 0.18 0.00 7.5 0.33 0.00 0.33 1.30 0.15 100.0% 0.33 0.00 A9A DI-36 10 0.27 0.79 0.21 4.0 0.84 0.00 0.84 0.013 0.020 0.020 0.08 0.18 0.5 0.37 3.20 7.5 1.57 0.00 1.57 0.23 0.5 0.45 5.22 A9Z DI-3C 6 0.40 0.89 0.35 4.0 1.41 0.00 1.41 0.013 0.133 0.020 0.08 0.16 0.5 0.32 2.00 7.5 2.64 0.00 2.64 0.24 0.5 0.48 4.76 A9Y DI-3B 12 0.12 0.73 0.09 4.0 0.35 0.00 0.35 0.013 0.133 0.020 0.08 1.17 0.14 100.0% 0.35 0.00 7.5 0.66 0.00 0.66 1.48 0.15 100.0% 0.66 0.00 A9 DI-313 12 0.25 0.68 0.17 4.0 0.68 0.00 0.68 0.013 0.133 0.020 0.08 1.50 0.15 100.0% 0.68 0.00 7.5 1.28 0.00 1.28 1.90 0.16 95.8 % 1.22 0.05 A8 DI-313 10 0.09 0.53 0.05 4.0 0.19 0.00 0.19 0.013 0.133 0.020 0.08 0.93 0.14 100.0% 0.19 0.00 7.5 0.36 0.05 0.41 1.24 0.15 100.0% 0.41 0.00 A6 DI-3B 14 0.31 0.85 0.26 4.0 1.05 0.00 1.05 0.013 0.015 0.040 - 4.08 0.16 100.0% 1.05 0.00 7.5 1.97 0.00 1.97 5.17 0.21 100.0% 1.97 0.00 131A DI-3B 10 0.40 0.71 0.28 4.0 1.14 0.00 1.14 0.013 0.040 0.020 0.08 0.19 0.5 0.38 1.55 7.5 2.13 0.00 2.13 0.23 0.5 0.47 3.50 B7 DI-313 10 0.17 0.61 0.10 4.0 0.40 0.00 0.40 0.013 0.073 0.020 0.08 1.36 0.15 100.0% 0.40 0.00 7.5 0.76 0.00 0.76 1.76 0.16 100.0% 0.76 0.00 B6 DI-313 10 0.04 0.82 0.04 4.0 0.14 0.00 0.14 0.013 0.073 0.020 0.08 0.93 0.14 100.0% 0.14 0.00 7.5 0.27 0.00 0.27 1.18 0.14 100.0% 0.27 0.00 B5 DI-313 10 0.32 0.75 0.24 4.0 0.96 0.00 0.96 0.013 0.016 0.020 0.08 0.20 0.5 0.40 3.97 7.5 1.80 0.00 1.80 0.24 0.5 0.48 6.09 B3 DI-313 10 0.16 0.66 0.11 4.0 0.43 0.00 0.43 0.013 0.040 0.020 0.08 4.26 0.09 100.0% 0.43 0.00 7.5 0.80 0.00 0.80 5.39 0.11 100.0% 0.80 0.00 B2 DI-313 10 0.59 0.86 0.51 4.0 2.03 0.00 2.03 0.013 0.040 0.020 0.08 0.21 0.5 0.42 4.55 7.5 3.80 0.00 3.80 0.25 0.5 0.51 6.72 C4 DI-313 10 0.16 0.56 0.09 4.0 0.36 0.00 0.36 0.013 0.040 0.020 0.08 1.47 0.15 100.0% 0.36 0.00 7.5 0.67 0.00 0.67 1.85 0.16 100.0% 0.67 0.00 C3 DI-313 10 0.34 0.59 0.20 4.0 0.82 0.20 1.02 0.013 0.040 0.020 0.08 2.70 0.17 100.0% 1.02 0.00 7.5 1.54 1.11 2.65 5.83 0.24 85.4 % 2.26 0.39 C2 EX. DI-3B 8 0.67 0.78 0.52 4.0 2.06 0.00 2.06 0.013 0.020 0.020 0.08 5.85 0.25 90.1 % 1.86 0.20 7.5 3.87 0.00 3.87 8.11 0.30 71.3 % 2.76 1.11 Postdev 8-20P EX. DI-36 10 0.43 0.74 0.32 4.0 1.28 0.00 1.28 0.013 0.030 0.020 0.08 3.88 0.20 100.0% 1.28 0.00 7.5 2.40 0.00 2.40 5.99 0.24 100.0% 2.40 0.00 52 LD-229 Storm Drain Design Computations Pantops Corner From Structure To Structure Catch. Area (ac) Runoff Coef Increment AC Accum. AC Total TOC (min) Total Intensity (in/hr) Total Flow (cfs) Up Invert Elev. Down Invert Elev. Pipe Length (ft) Invert Slope % Pipe Diameter (in) Pipe Capacity (cfs) Velocity (ft/s) Flow time Increment (min) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 D2 D1" 1.66 0.69 1.15 1.15 5.00 6.81 7.86 390.20 389.70 34.31 1.46% 15 8.5 7.8 0.07 A13 Al2 0.67 0.83 0.56 0.56 5.00 6.81 3.82 385.50 378.00 107.73 6.96% 15 18.9 12.3 0.15 Al2 A11 0.07 0.74 0.05 0.61 5.15 6.77 4.15 377.80 376.20 40.74 3.93% 15 14.3 10.3 0.07 A11 C A11 B 0.14 0.83 0.12 0.12 5.00 6.81 0.79 383.00 381.70 102.00 1.27% 15 7.9 4.1 0.41 A11B A11A 0.24 0.77 0.18 0.30 5.41 6.69 2.01 381.50 380.20 85.59 1.52% 15 9.3 6.4 0.22 A11 A A11 0.00 0.00 0.00 0.30 5.64 6.63 1.99 380.00 376.20 124.03 3.06% 15 12.2 7.1 0.29 A11 A10 0.34 0.81 0.27 0.89 5.21 6.75 5.99 376.00 373.70 69.94 3.29% 18 18.8 10.0 0.12 A10 A9 0.06 0.78 0.04 0.93 5.33 6.72 6.25 373.50 363.00 95.30 11.02% 18 38.7 17.7 0.09 A9A A9 0.27 0.79 0.21 0.21 5.00 6.81 1.43 370.00 363.00 49.97 14.01 % 15 26.2 11.4 0.07 A9Z A9Y 0.40 0.89 0.35 0.35 5.00 6.81 2.40 365.30 363.60 13.14 12.94% 12 13.7 12.9 0.02 A9Y A9 0.12 0.73 0.09 0.44 5.02 6.81 2.99 362.90 362.50 22.21 1.80% 15 9.4 6.8 0.05 A9 A8 0.25 0.68 0.17 1.75 5.07 6.79 11.89 362.30 360.60 45.30 3.75% 18 22.0 9.4 0.08 A8 A7 0.09 0.53 0.05 1.80 5.15 6.77 12.17 360.40 359.70 67.88 1.03% 24 24.9 8.2 0.14 A7 A6 0.00 0.00 0.00 1.80 5.29 6.73 12.10 359.50 357.90 153.65 1.04% 24 25.0 8.2 0.31 A6 A5 0.31 0.85 0.26 2.06 5.60 6.64 13.69 357.70 356.90 72.05 1.11 % 24 25.7 8.4 0.14 A4 A3 11.71 354.00 352.13 15.92 11.75% 30 152.3 18.4 0.01 A3 A2 11.71 350.93 348.71 54.10 4.10% 30 90.0 12.7 0.07 A2 Al 11.71 340.52 340.00 20.24 2.57% 30 71.7 10.7 0.03 B7 B6 1.17 0.78 0.92 0.92 5.00 6.81 6.23 378.50 378.00 25.00 2.00% 15 9.9 8.5 0.05 B6 B5 0.04 0.82 0.04 0.95 5.05 6.80 6.46 377.80 376.20 134.79 1.19% 15 7.6 7.0 0.32 B5 B4 0.32 0.75 0.24 1.19 5.37 6.71 7.99 376.00 375.50 24.90 2.01 % 18 16.2 9.1 0.05 B4 B3 0.00 0.00 0.00 1.19 5.42 6.69 7.98 375.30 372.70 100.38 2.59% 18 18.4 10.0 0.17 B3 B2 0.16 0.66 0.11 1.30 5.58 6.65 8.63 372.50 363.20 145.91 6.37% 18 28.7 14.2 0.17 B2 B1 0.59 0.86 0.51 1.81 5.75 6.60 11.91 363.00 359.00 40.28 9.93% 18 35.9 18.2 0.04 B1A B1 0.40 0.71 0.28 0.28 5.00 6.81 1.94 361.50 359.00 19.80 12.63% 15 24.9 12.0 0.03 C4 C3 0.16 0.56 0.09 0.09 5.00 6.81 0.61 350.11 349.53 59.18 0.98% 15 7.0 3.4 0.29 C3 C2 0.34 0.59 0.20 0.29 5.29 6.73 1.98 349.33 348.66 67.51 0.99% 15 7.0 4.2 0.27 C2 EX. Cl 0.67 0.78 0.52 0.52 5.56 6.65 3.43 348.46 347.80 112.83 0.58% 15 5.3 3.4 0.55 =x. Storm Sewer Downstream D1 is adequate. See Rte 250 LD-347 53 PANTOPS CORNTER :1 1 :1 160 240 :1 PREDEV DRAINAGE INFO TO PREDEV D1: TURF HSG B: 0.67 AC IMPERVIOUS: 0.78 AC TOTAL: 1.45 AC TO PREDEV 8-20P: TURF HSG B: 0.25 AC IMPERVIOUS: 0.25 AC TOTAL: 0.50 AC HYDROLOGIC DATA TO PREDEV D1: Assumed ToC = 5.0 min 02-YR= 4.68 cfs Q10_YR= 6.16 cfs TOTAL TO PREDEV 8-20P: Q2-YR= 8.48 cfs Q10_YR= 11.21 cfs PRE-DEV DRAINAGE MAP RTE 250 INLETS 56 :1 1 :1 160 240 i1 POSTDEV DRAINAGE INFO TO POSTEV D2 & D1: TURF HSG B: 0.52 AC IMPERVIOUS: 0.90 AC TOTAL: 1.42 AC TO POSTEV 8-20P: TURF HSG B: 0.11 AC IMPERVIOUS: 0.32 AC TOTAL: 0.43 AC HYDROLOGIC DATA TO POSTEV D2 & D1: Assumed ToC = 5.0 min Q2_YR= 5.01 cfs Q10-YR= 6.60 cfs TOTAL TO POSTEV 8-20P: Q2-YR= 8.92 cfs Q10-YR= 11.80 cfs PANTOPS CORNTER POST-DEV DRAINAGE MAP RTE 250 INLETS 57 1.41 P STR 6-17P/ FRF - `OCR Q- STR 6-13P STR 7-1 P STR 7-3P i i STR 7-2P STR 7-1 1/ 1 100 200 300 ■ ■ ■ ■ ■ 11 O E:::::::] TR 7-18P,� ' -- STATE ROUTE 250 f '/ 1 PANTOPS CORNTER EXISTING DOWNSTREAM DRAINAGE MAP RTE 250 INLETS / ,-------- - / _- ------------- ------ -- ---1 \ IL m D �O i i - - — O m �--- ----- - TR 8-21 ---- - `---.......... -- -------- --- =3ap- r-Pa 250 DRAINAGE MAP) STATE ROUTE 250 A I m W m z 0 58 Rte 250 LD-229 Pantops Corner From To Design Catch. Runoff Increment Accum. Total Total Total Up Down Pipe Invert Pipe Pipe Velocity Flow time Structure Structure Storm Area Coef AC AC TOC Intensity Flow Invert Invert Length Slope Diameter Capacity Increment (ac) (min) (in/hr) (cfs) Elev. Elev. (ft) % (in) (cfs) (ft/s) (min) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Predev 22P 2-yr 1.45 0.62 0.90 0.90 5.00 5.17 4.68 389.50 377.60 263.0 4.52 io 15 13.7 �, 10.6 0.41 10-yr 5.00 6.81 6A6 11.4 0.38 Postdev D1 8-22P 2-yr 1.42 0.68 0.97 0.97 5.00 5.17 5.01 389.50 377.60 263.0 4.52% 15 13.70 10.8 0.41 10-yr 5.00 6.81 6.60 11.6 0.38 8-21 P 8-20P 2-yr 0.57 0.83 0.47 0.47 5.00 5.17 2.44 377.80 377.60 8.0 2.50% 15 10.20 6.8 0.02 (Flow to inlet did not change) 10-yr 5.00 6.81 3.21 7.0 0.02 Predev 8-20P 8-4P 2-yr 0.50 0.59 0-30 1.67 5.41 8A18 377.60 168.00 224.0 4297, 3 21.76 11 .9 0-31 10-yr 5.38 _ 11.21 120 0.31 Postdev 8-20P 8-4P 2-yr 0.43 0.74 0.32 1.76 5.41 5.07 8.92 377.60 368.00 224.0 4.29% 18 21.80 11.4 0.33 10-yr 5.38 6.70 1 11.80 1 12.9 0.29 A Flow at 8-20P 2-yr 2-yr 0.44 10-yr 10-yr 0.59 Postdev Downstream Flows: 8-4P 7-22P 10-yr 0.67 0.82 0.55 2.31 5.67 6.62 15.33 367.10 361.00 291.0 2.10% 18 15.22 8.6 0.56 7-22P 7-18P 10-yr 1.14 0.84 0.96 3.28 6.23 6.47 21.21 357.37 348.87 200.0 4.25% 18 21.66 12.3 0.27 7-18P 7-3P 10-yr 1.00 0.85 0.85 4.13 6.50 6.40 26.44 348.39 342.50 147.0 4.01% 18 18.16 10.3 0.24 7-3P 7-1 P 10-yr 2.15 0.90 1.90 6.03 6.74 6.34 38.23 339.78 338.04 55.0 3.16% 24 40.21 14.6 0.06 7-1 P 6-16P 10-yr 0.32 0.85 0.28 6.30 6.80 6.33 39.88 335.40 330.40 95.0 5.26% 24 51.88 18.3 0.09 6-16P 6-17P 10-yr 0.53 0.85 0.46 6.77 6.89 6.31 42.68 330.30 312.10 79.0 23.04% 24 108.59 32.7 0.04 59 Rte 250 Inlets LD-347 Hydraulic Grade Line n = 0.013 Inlet Number 1 Outlet Water Surface Elev.* 2 Do 3 Oo 4 Lo 5 S+o % 6 Hf 7 Junction Loss Final H 19 Inlet Water Surface Elev. 20 Rim. Elev 21 V o (8) Ho (9) O; (10) V; (11) O;V; (12) H; (13) Angle (14) H o (15) H (16) 1.3*H (17) O.5H < (18) 6-16P 313.70 2.00 42.68 79.00 3.560% 2.812 32.69 4.9781 39.88 18.30 729.9 1.820 15 0.988 7.786 10.598 324.30 338.65 7-1 P 332.00 2.00 39.88 95.00 3.109% 2.954 18.30 2.2361 38.23 14.59 557.8 1.157 40 1.421 4.814 7.768 339.77 343.58 7-3P 339.77 2.00 38.23 55.00 2.857% 1.571 14.59 1 0.1983 26.44 1 10.28 271.8 1 0.574 5 0.098 1 0.871 1 2.442 342.21 345.50 7-18P 343.70 1.50 26.44 147.00 6.337% 9.315 10.28 0.0985 21.21 12.25 259.8 0.816 5 0.140 1.054 0.5269 9.842 353.54 354.57 7-22P 353.54 1.50 21.21 200.00 4.079% 8.158 12.25 0.1165 15.33 8.60 131.8 0.402 3 0.057 0.576 0.2879 8.446 361.99 364.37 8-4P 362.20 1.50 15.33 291.00 2.130% 6.199 8.60 0.0459 11.80 12.90 152.2 0.904 1 0.103 1.054 0.5269 6.726 1 368.93 371.70 Postdev 8-20P 369.20 1.50 11.80 224.00 1.262% 2.828 11.40 0.0807 11.21 12.00 134.6 0.783 1 0.089 0.953 3.781 372.98 1 381.60 Postdev D1 378.60 1.25 6.60 263.00 1.044% 2.745 11.60 1.2537 6.60 7.75 51.1 0.326 69 0.560 2.14 1 1.0698 3.814 382.41 1 393.60 Postdev D2 390.70 1.25 6.60 8.50 1.044 % 0.089 7.75 1 0.0373 6.60 1 7.75 51.1 0.009 0.037 0.084 0.1091 0.0546 0.143 390.84 393.09 'Outlet WSE is listed as the greater of either the calculated tailwater or the invert out. 60 PANTOPS CORNTER POST DEVELOPMENT LAND COVER MAP IMPFRVIOUS (TYP.) (RTE IMPRO 1 20 ROW VEMENTS) SITE BOUNDARY -----T — i i IMPERVIOUS (TYP.) it a :.o..0-:1i a i it II C-1 1 IMPERVIOUS (TYP.) I L� FFSITE AREA (RTE 250 ROW IMPROVEMENTS) i i i I i APPLICABLE AREA: 6.67 AC ONSITE + I I 0.15 AC OFFSITE _ 6.82 AC TOTAL I ONSITE AREA: 5.11 AC IMP 1.56 AC DERV OFFSITE AREA: 0.12 AC IMP 0.03 AC DERV TOTAL AREA: 5.23 AC IMP 1.59 AC DERV 62 STEP 1 Pantops Corner - Appendix 5D Nutrient Requirement Spreadsheet WnrkehPPt 1 page 1 of 3 Determine the applicable area (A) and the post -developed impervious cover (Ipo.d. (6.67 acres onsite + 0.15 acres Applicable Area (A)* = 6.82 acres offsite ROW improvements Post -development impervious cover: Total = 5.23 acres Ipost = (total post -development impervious cover - A) x 100 = 76.7% * The area subject to the criteria may vary from locality to locality. Therefore, consult the locality for proper determination of this value. STEP 2 Determine the average land cover condition (Iwatershed) or the existing impervious cover (Iexisting). Average land cover condition (I,,,a,pr�, p�): If the locality has determined land cover conditions for individual watersheds within its jurisdiction, use the watershed specific value determined by the locality as Iwatershed• Iwatershed — % Otherwise, use the Chesapeake Bay default value: Iwatershed - 16% 63 PERFORMANCE -BASED WATER QUALITY CALCULATIONS WnrkchPPt 1 page 2 of 3 Existing impervious cover Determine the existing impervious cover of the development site if present. Existing impervious cover: Total = 0.27 acres lexisting = (total existing impervious cover - A*) x 100 = 4% * The area should be the same as used in STEP I STEP 3 Determine the appropriate development situation. The site information determined in STEP 1 and STEP 2 provide enough information to determine the appropriate development situation under which the performance criteria will apply. Check (�) the appropriate development situation as follows: Situation 1: This consists of land development where the existing percent impervious cover (Ie.,jst,ng) is less than or equal to the average land cover condition (Iwatershed) and the proposed improvements will create a total percent impervious cover (IPost) which is less than or equal to the average land cover condition (Iµatermhed)- IPost :5 Iwatershed 64 PERFORMANCE -BASED WATER QUALITY CALCULATIONS Workcheet 1 page 3 of 3 Situation 2: This consists of land development where the existing percent impervious cover (Iexisting) is less than or equal to the average land cover condition (1watershed) and the proposed improvements will create a total percent Situation 3: Situation 4: impervious cover (IPost) which is ,greater than the average land cover condition (Iµatershed)- ,existing ,Post ,watershed ; and > ,watershed This consists of land development where the existing percent impervious cover (Ie dsting) is greater than the average land cover condition (I�atershed)- ,existing 4.0 % > ,watershed 16.0 % ; and This consists of land development where the existing percent impervious cover (lexistind is served by anexisting stormwater management BMP(s) that addresses water quality. If the proposed development meets the criteria for development Situation 1, than the low density development is considered to be the BMP and no pollutant removal is required. The calculation procedure for Situation 1 stops here. If the proposed development meets the criteria for development Situations 2, 3, or 4, then proceed to STEP 4 on the appropriate worksheet. 65 Pantops Corner - Appendix 5D Nutrient Requirement Spreadsheet Worksheet 2 page 1 of 3 Summary of Situation 2 criteria: from calculation procedure STEP 1 thru STEP 3, Worksheet 1: Applicable area (A)* = 6.82 acres Ipost = (total post -development impervious cover _ A) x 100 = 76.7% Iwatershed = % or lwatershed= 16% Iexisting = (total existing impervious cover - A*) x 100 = 3.96% Iexisting 4.0 % 15 Iwatershed 16.0 % ; and Ipost 76.7 % > Iwatershed 16.0 % STEP 4 Determine the relative pre -development pollutant load (Lpre)• Lpre(watershed) _ [0.05 + (0.009 X Iwatershed)] X A X 2.28 (Equation 5-16) where: Lpre(watershed) — relative pre -development total phosphorous load (pounds per year) Iwatershed = average land cover condition for specific watershed or locality or the Chesapeake Bay default value of 16% (percent expressed in whole numbers) A = applicable area (acres) Lpre(watershed) _ [0.05+ (0.009 x 16.0%)] x 6.82 x 2.28 3.02 pounds per year 66 PERFORMANCE -BASED WATER QUALITY CALCULATIONS Worksheet 2 page 2 of 3 STEP 5 Determine the relative post -development pollutant load (Lpost)- Lpost = [0.05 + (0.009 x Ipast)] x A x 2.28 (Equation 5-21) where: Lpost = relative post -development total phosphorous load (pounds per year) Ipost = post -development percent impervious cover (percent expressed in whole numbers) A = applicable area (acres) Lpost = [0.05 + (0.009 x 76.7%)] x 6.82 x 2.28 11.51 pounds per year STEP 6 Determine the relative pollutant removal requirement (RR). RR = Lpost - Lpre(watershed) RR = 11.51 - 3.02 = 8.49 pounds per year STEP 7 Identify best management practice (BMP) for the site. 1. Determine the required pollutant removal efficiency for the site: EFF = ( RR / Lpost ) x 100 (Equation 5-22) where: EFF = required pollutant removal efficiency (percent expressed in whole numbers) RR = pollutant removal requirement (pounds per year) Lpost = relative post -development total phosphorous load (pounds per year) EFF = (8.49 - 11.51) x 100 74 % 67 PERFORMANCE -BASED WATER QUALITY CALCULATIONS Worksheet 2 page 3 of 3 2. Select BMP(s) from Table 5-14 and locate on the site: BMP 1: Bioretention filter 3. Determine the pollutant load entering the proposed BMP(s): LBMP = [0.05 + (0.009 x IBMP)] x A x 2.28 (Equation 5-23) where: LBMP = relative post -development total phosphorous load entering proposed BMP (pounds per year) 'BMP = post -development percent impervious cover of BMP drainage area (percent expressed in whole numbers) A = drainage area of proposed BMP (acres) LBMP1 = [0.05+ (0.009 x x 2.28 = 0.00 pounds per year 4. Calculate the pollutant load removed by the proposed BMP(s): Lremoved = EffBMP x LBMP (Equation 5-24) where: Lremoved = post -development pollutant load removed by proposed BMP (pounds per year) EffBm = pollutant removal efficiency of BMP (expressed in decimal form) LBMP = relative post -development total phosphorous load entering proposed BMP (pounds per year) Lremoved/BMPI = 0.65 x 0.00 = 0.00 pounds per year 5. Calculate the total pollutant load removed by the BMP(s): Lremoved/total = LlemovedBMPI (Equation 5-25) 0.00 pounds per year 6. Verify Compliance: Lremoved/total >- RR 0.00 >_ 8.49 W. Rivanna River Nutrient Bank May 31, 2019 Keane Rucker, E.I.T. Civil Engineer Shimp Engineering keanekshimp-en ing eerin .cg om Phone: 434.299.9843 Certificate No. James-039 Project Name: Pantops Corner Location: Albemarle County, Tax Map 78 Parcels 5A, 5B, 5E, & 58G1 Owner: Pantops Corner LC 12704 Crimson Ct Ste. 101 Henrico Va, 23233 Credit Amount Desired: 8.49 lbs Project HUC: 020802040401 Rivanna River -Meadow Creek Dear Keane, This letter is to confirm the availability of authorized Nutrient Credits sufficient to meet your projects requirements of 8.49 Nutrient Credits at our above referenced nutrient offset credit bank facility (the "Bank"), which is registered with the Virginia Department of Environmental Quality (DEQ. These Nutrient Credits are generated and managed under the terms of the Reduction Implementation Plan for the Bank dated November 2017, which was authorized by the Virginia Department of Environmental Quality (DEQ) on September 5, 2018. The Bank has been authorized to provide Nutrient Credits for use in the James River watershed. These credits are transferable to those entities regulated under DEQ's Storm Water Management program in accordance with VA Code 62.1-44.15:27. If we can provide further assistance please feel free to contact our office. Hotel Street Capital, LLC, Bank Sponsor By Its Manager Thomas James Ross II 540-687-0171 Rivanna River Nutrient Offset Trading Bank, 31 Garrett Street, Warrenton, Virginia 20186 69 Custom Soil Resource Report Map —Hydrologic Soil Group 3 N N 723340 723390 723440 723490 723540 723590 723640 38° 2' 14" N 38° 2' 14" N 10. O N f O A' i N— o N 7 N O N O V N N O V ® N N Y` O V � N - � 7 r s t N 0 1 i 38° 1' 59" N - - - 38° 1' 59" N 723340 723390 723440 723490 723540 723590 723640 Ln 3 3 m F Map Scale: 1:2,150 if printed on A portrait (8.5" x 11") sheet. N N Meters N 0 30 60 120 180 Few 0 100 200 400 600 Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 17N WGS84 19 72 Custom Soil Resource Report Table —Hydrologic Soil Group Hydrologic Soil Group— Summary by Map Unit —Albemarle County, Virginia (VA003) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 12C Catoctin silt loam, 7 to 15 percent slopes B 0.6 3.8% 12D Catoctin silt loam, 15 to 25 percent slopes B B 1.2 6.6 7.9% 42.9% 23B Davidson clay loam, 2 to 7 percent slopes 23C Davidson clay loam, 7 to 15 percent slopes B 1.2 0.4 8.0% 2.6% 79B Starr silt loam, 2 to 7 percent slopes B 88 Udorthents, loamy 5.3 34.8% Totals for Area of Interest 15.3 100.0% Rating Options —Hydrologic Soil Group Aggregation Method: Dominant Condition Component Percent Cutoff.- None Specified Tie -break Rule: Higher 21 74 Precipitation Frequency Data Server https://hdse.nw s.noaa. gov/hdsc/pfds/pfds_printpage.html?lat=3 8.0347&... NOAA Atlas 14, Volume 2, Version 3 Location name: Charlottesville, Virginia, USA* AN Latitude: 38.0347°, Longitude:-78.4531 Elevation: 396.01 ft** source: ESRI Maps �a " source: USGS POINT PRECIPITATION FREQUENCY ESTIMATES G.M. Bonnin, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley NOAA, National Weather Service, Silver Spring, Maryland PF tabular I PF graphical I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1 Average recurrence interval (years) Duration I 100 200 1 2 5 10 25 50 500 1000 5-min 0.353 0.420 0.492 0.553 0.623 0.677 0.728 0.775 0.832 0.878 (0.318-0.392) (0.379-0.466) (0.443-0.545) (0.497-0.613) (0.557-0.687) (0.603-0.746) (0.645-0.802) (0.682-0.854) (0.724-0.919) (0.758-0.974) 10-min 0.564 0.672 0.788 0.885 0.993 1.08 1.16 1.23 1.32 1.38 (0.508-0.626) (0.606-0.745), (0.709-0.873) (0.795-0.980) (0.888-1.10) (0.961-1.19) (1.02-1.27) 1 (1.08-1.35) 1 (1.15-1.45) 1 (1.19-1.53) 15-min 705 00���� .161��(0.635-0.783)(0.762-0.937)I�(0.897-1.10) (1.01-1.24) (1.13-1.39) (1.22-1.51) (1.29-1.61 (13_ .71) I(1.44-1.83) (1.50-1.93) 30-min 0.966 1.17 1.42 1.62 1.86 2.06 2.24 2.41 2.64 2.81 (0.870 1.07) (1.05 1.29) (1.27-1.57) (1.46 1.80) (1,67-2.06) (1.83-2.27) (1.98-2.47) (2.12-2.66) (2.30-2.91) F(2.43 3.12) 60-min 1.21 1.46 1.82 2.11 2,48- --- 2.79--- --- --- -- 3.08 3.39 3.78 4.11 (1.09-1.34) (1.32-1.62) (1.63-2.01) F .90 2.34) (2.22-2.74) (2.48-3.07) (2.73-3.40) (2.98-3.73) (3.29-4.18) (3.54-4.55) 2-hr 3-hr 6-hr 12-hr 24-hr 2-day 3-day 4-day 7-day 1.45 1.76 2.19 2.58 3.07 3.48 3.91 4.35 4.96 5.47 (1.27-1.66) (1.54-2.00) (1.93-2.50) (2.27-2.93) 1 (2.68-3.48) (3.03-3.94) 1 (3.37-4.42) (3.73-4.91) 1 (4.20-5.60) (4.59-6.20) 1.59 1.92 2.40 2.81 3.35 3.81 4.28 4.76 5.43 6.00 (1.39-1.82) 11 (1.68-2.20) (2.10-2.76) (2.45-3.22) (2.91-3.83) (3.29-4.34) (3.67-4.87) (4.05-5.43) j (4.57-6.20) (4.99-6.86) 2.02 2.43 1 3.02 3.56 1 4.28 1 4.91 1 5.57 1 6.28 1 7.28 1 8.17 (1 .79-2.29) (2.15-2.76) 1 (2.66-3.43) (3.12-4.03) 1 (3.73-4.84) (4.25-5.53) (4.77-6.28) (5.32-7.08) 1 (6.09-8.22) 1 (6.74-9.23) 2.53 3.05 3.80 4.51 5.48 6.36 7.30 8.33 9.85 11.2 F (2.24-2.90) (2.69-3.50) (3.34-4.35) (3.95-5.15) (4.76-6.24) (5.47-7.22)J (6.20-8.27) (6.99 9.43) (8.11-11.2) 09 12.7) 3.03 3.66 F 4.68 1 F 5.54 6.81 F 7.90 9.10 F 10.4 F 12.4 14.1 (2.72-3.40) 1 (3.29-4.12) 1 (4.19-5.26)J (4.94-6.20) 1 (6.03-7.59) 1 (6.95-8.79) 1 (7.94-10.1) 11 (9.00-11.6) 1 (10.5-13.8) 3.57 7F 4.33 7F 5.51 6.48 7F 7.88 7F 9.06 7F 10.3 11.7 13.8 (3.20-3.99) (3.89-4.84) (4.93-6.15) (5.78-7.22) (6.99-8.77) (7.98-10.1) (9.04-11.5) 11 ( 10.2-13.1) ( 11.8-15.4) 13.1-17.3 3.80 4.61 5.86 6.88 8.37 9.62 11.0 12.4 14.6 16.4 (3.45-4.21) (4.18-5.11) (5.30-6.49) 11 (6.22-7.61) (7.52-9.24) 1 (8.58-10.6) (9.72-12.1) 1 (10.9-13.7) 1 (12.7-16.2) 1 (14.1-18.2) 4.03 4.89 6.21 7.29 8.86 10.2 11.6 13.1 15.4 17.3 (3.70-4.44) 1 (4.47-5.37) 1 (5.68-6.82) (6.65-8.00) (8.05-9.71) 1 (9.19-11.2) 1 (10.4-12.7) 11 (11.7-14.4) (13.5-16.9) 1 (15.0-19.1) 4.69 1 F 5.64 F 7.06 IF 8.22 9.89 T 11.3 12.8 F 14.4 F 16.7 F 18.6 (4.31-5.11) (5.19-6.16) (6.47-7.70) (7.52-8.96) (9.00-10.8) (10.2-12.3) (11.5-13.9) (12.8-15.7) (14.7-18.3) (16.2-20.4) 10-day 4���� 10.8 � 1� 1 _1 1� 1� 19.4 ( .91-5.75) (5.89-6.90) (7.27-8.52) (8.37-9.84) (9.91-11.7) (11.1-13.2) (12.4-14.8) (13.8-16.6) (15.6-19.0) (17.1-21.1) 20-day 6.98 8.32 10.1 11.4 JF(l 13.3 14.7 16.2 ) 17.7 19.8 21.4 (6.53-7.47)J (7.80-8.91) (9.41-10.8) F(l0.7-12.2) 2.3-14.2) Fo3.6-15.7) (15.0-17.4 (16.3-19.0) (18.1-21.3) F 9.4-23.1) 30-day 6-9. 10.1 .3-1 13.4 15.3 16.7 181 192 212 22.5 (8.06-9.11) (9.5510.8) (11.312.8) (12.614.3) (14.3-16.2) (15.617.7) (16.8-19.2) (18.0-20.6) (19.5-22.6) 45-day 10.7 F 12.6 7F 14.8 16.4 7F 18.4 F 19.9 21.4 F 22.8 7F 24.6 IF 26.0 (10.1-11.3) 1 (11.9-13.4) (13.9-15.6)_ (15.4-17.3) (17.3-19.5) 1 (18.7-21.1) 1 (20.0-22.7) 1 (21.3-24.2) 1 (22.9-26.2) (24.0-27.7) 60 d yy 12.5 14.8 17.0 18.7 20.9 22.5 24.0 25.5 27.3 28.7 (11-Li-3 -2-)(14.0 15.6) (16.1-18.0) (17.7-19.8) (19.7-22.1) (21.2-23.7) (22.6-25.4) (23.9 27.0) (25.5-29.0) (26.7-30.5) t Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). Numbers in parenthesis are PF estimates at lower and upper bounds of the 90 % confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5 % . Estimates at upper bounds are not -hecked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical 77 1 of 4 6/20/2018, 10:40 AM Section 6. Pollution Prevention Plan. (reference County Code 17-404 and State Regulation 9VAC25-880-70 part I1 section A.4) A. Plan showing pollution activities and prevention practices Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County PCHOLIDA YINNEXPRESS r POLLUTIONPREVENTIONPLAN T \ 171 - - �, CRPTICAL Af�EA �' d li �P (n•P) CONCRETE C5PAVING/ y� Ir II-,�� CLEANOUT. � PL Ur �AIION, LIMIT �I� ® �� - AND-T SHPRACK(TY �I I, ,00er --------=-- 1-� DUST URBJINCE \ CONCRETE OPERATIONS (TYP.) �? Iv I I WAWA BUILDING . ® • ®- OiNS, \ v �� I'�� j, j O PORTAJ TRASH. AND CONCRE OPERATION (TYP.) N M SE SUPPLY --�LLJ L�AIN GAGE li t -- 3 1 TION & \ I i ` I� p• L�CA v v i l i II I Ili• � J I I HOLIDAY INN 1 .:. 0 PC ® sPp 'MAILBOX N CRITICAL ARE \ v I v EXPRESS HOTELi— \ 1 SPILL KIT X'sN RACK - \ v 'v I BUILDING —DNA v ----- I STITIbM&� I \ PAINTvI IPWL STOCKPILE AREA r r�r L• .. � - i \ —A w —w —w —w — w w —w - v —w w' \ I W,o, PANTOPS CORK WAY ---, V I I x x X w— —w — —w —w \. ZPVE h1G/ p�'Lj, \' \\� \ ' \ ♦ � -- OPERATIO - _ II — — \/c�B�O C5 ♦ � 5 3s — r S>v�� \ v v \ ♦ A� 1 I r vv 0� i �J S p �lj F \` ♦ _ `. I v� SELF STORAGE '-- BUILDING AR _---- I SF_ 3 7 --- F... --- --_ - - si - — -- SOIL EROSION & SEDIMENT CONTROL SYMBOLS 370-- \I Epp \\\ ` * _ — — — SYMBOL NO. TITLE KEY \ \ 3 1 3.02 CONSTRUCTION ENTRANCE CE \ - — — — — — — — — — — — \ 3.03 CONSTRUCTION ROAD STABILIZATION CRS X X —X —X — 3.05 SILT FENCE SF 3.07 INLET PROTECTION IP v it v i 3.09 TEMPORARY DIVERSION DIKE DD 3.31 TEMPORARY SEEDING TS 3.32 PERMANENT SEEDING PS I *\ • '� + � I � \\ � �\ Ivy 3.35 MULCH NOTE: CONTRACTOR CAN RELOCATE �\ \"�\� M H �� pc 3.39 DUST CONTROL DG POLLUTION PREVENTION ITEMS, BUT - - - — - - - I -'u I _ _ LIMITS OF DISTURBANCE MUST MARK UP DRAWINGS WITH WINDING �; \ --�— I \ UPDATED LOCATION. RIVER \ �` LIMITS OF DISTURBANCE TO BE LANE 3 \ III \ FIELD MARKED WITH WHITE I FLAGS OR WHITE PAINT 60 0 60 120 180 \ \ Scale: 1 "=60' LIM Nources of rouutants, locations, ana prevention practices Pollutant, or Pollutant Prevention Practices, Generating Activity Location on site Control Measures C. Sources of Pollutants continued. Common activities and minimum control and prevention practices Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Follow Erosion and Sediment Control Clearing, grading, excavating, and un- Land disturbance area Plan. Dispose of clearing debris at stabilized areas acceptable disposal sites. Seed and mulch, or sod within 7 days of land clearing Cover storm drain inlets and use drip pans Paving operations Roads and driveways and absorbent/oil dry for all paving machines to limit leaks and spills Direct concrete wash water into a leak - Concrete washout and Current location and detail shown on proof container or leak -proof settling basin cement waste plan that is designed so that no overflows can occur Enclose or cover material storage areas. Mix paint indoors in a containment area or Structure construction, stucco, Structures in a flat unpaved area. Prevent the painting, and cleaning discharge of soaps, solvents, detergents and wash water, paint, form release oils and curing compounds. Water shall be filtered, settled or similarly Dewatering operations Dewatering sites shown on plan treated prior to discharge as shown on plan. Designated areas for material delivery and Material delivery and storage Designated area shown on plan storage. Placed near construction entrances, away from waterways and drainage paths Material use during building process Building areas Follow manufacturer's instructions. MSDS's attached. Waste collection area will not receive a substantial amount of runoff from upland areas and does not drain directly to a Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Current designated container areas on waterway. Containers have lids covered Solid waste disposal plan before periods of rain, or are in a covered area. Scheduled collection to prevent overfilling. MATERIALS NOT TO BE BURIED ON -SITE Convenient and well -maintained portable sanitary facilities will be provided, and Sanitary waste Current locations shown on plan located away from waterways or inlets. Such facilities shall be regularly maintained. Apply fertilizers in accordance with Landscaping operations Landscape areas shown on plan manufacturer's recommendations and not during rainfall events To be treated in a sediment basin or better control as specified on plan. Minimize Wash Waters Wash areas shown on plan the discharge of pollutants from e ui ment and vehicle washing Vehicle and equipment washing Designated areas and details shown on Provide containment and filtering for all plan wash waters per the plan Minimization of exposure to precipitation and stormwater. Minimize the exposure of building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials present on the site to precipitation and to stormwater. (Identify all non-stormwater discharges to occur on your site. Keep this plan up-to-date with ongoing site changes and inspections. See CGP, 9VAC25-880-70 section E for examples of non-stormwater discharges.) E. Persons responsible for pollution prevention practices Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County J.W. Enochs Inc GC: Wilson Enochs PO Box 589 Hopewell, VA 23860 804-366-6409 F. Response and reporting practices Minimize discharges from spills and leaks. Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures as follows. To the extent practical, do not store oils, chemicals, or other potential contaminants on site. When storage of potential contaminants is required, provide secondary containment, such as spill berms or spill containment pallets. These should be located within the drainage areas to a sediment trap or sediment basin. Direct concrete wash water into a settling basin, dispose of hardened concrete with other construction waste debris to an appropriate waste facility. Respond to all spills, leaks and discharges as follows. Spills of oil, petroleum products, sanitary wastes, and substances listed under 40 CFR parts 110, 117, and 302 should be cleaned up as soon as possible while protecting worker safety. Construct an earthen dike around any spills on dirt to prevent spreading. If a spill occurs during rainfall, cover it with a tarp or another impermeable cover to prevent contaminating runoff. Do not bury any spills or wash them with water. Maintain a spill kits in a readily accessible location. A spill kit shall consist of a lined drum with bags of universal sorbents in the bottom, accessible without tipping the drum, sorbent socks above the bags, and personal protective equipment on the top. All materials used to remove the contaminants, including any water used to rinse equipment, and all dirt removed must be treated as contaminated. Textiles, such as from coveralls, may be sent to a certified laundry facility. Waste must be disposed of according to the standards of Albemarle County and the Commonwealth of Virginia. Store hazardous materials and wastes in covered containers. Report all spills, leaks and discharges as follows: All spills, leaks, and discharges shall be recorded in the inspection logs. If construction activity results in a discharge of contaminants that may be reasonably expected to enter surface waters, the operator shall notify the Department of Environmental Quality immediately or within 24 hours, and shall submit a written report within five days. For significant spills that cannot be controlled by personnel in the immediate vicinity, notify the local emergency response by dialing 911. Albemarle County must also be notified, and potentially some of the following agencies: the Fire Department, the Public Works Department, the Coast Guard, the Highway Patrol, the County Police Department, Department of Toxic Substances, OSHA, etc. For spills of federal reportable quantities, in conformance with the requirements in 40 CFR parts 110, 119, and 302, the contractor should notify the National Response Center at (800) 424-8802. G. Pollution Prevention Awareness The engineer, project superintendent, and contractor shall have weekly meetings to review on -site conditions and advise contractor of potential risks that should be addressed. Contractor will be responsible for following procedures on a daily basis and applying appropriate waste management and prevention practices to be in compliance with the conditions of the general permit. Employees shall be informed of the danger to nature and to human health of various chemical spills. Section 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Water discharges into an impaired water: Rivanna River — Meadow Creek. Meadow Creek was listed as impaired due to Benthic-Macroinvertebrate Bioassessments for E-Coli and Fecal Coliforms. Site work shall be in compliance with the following requirements: 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. In accordance with Part I B 4 and Part I B 5, inspections shall be conducted as follows: I. 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 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted on the next business day; and II. Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to exceptional waters. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 8. Qualified personnel The following personnel are responsible for inspections; Wilson Enochs PO Box 589 Hopewell, VA 23860 904-366-6409 Patrick McCallister PO Box 589 Hopewell, VA 23860 804-541-0680 Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 9. Signed Certification 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." Owner/Operator Name: �� M ' r Company: Title: Signature: Date: y ZI e— Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County I : ar ::JIL-WWA Section 10. Delegation of authority. Delegation of Authority I, Amir Patel, 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 Pantops Corner Holiday Inn Express construction site. The designee is authorized to sign any reports, stormwater pollution prevention plans and all other documents required by the permit. � � /^/� LSon/ - .,A f.y (name of person or position) . (company) v •x S IF 9 (address) V4 03 O6 0 (city, state, zip) `/- ,3 6 6 - l LZ,9 (phone) By signing this authorization, I confirm that I meet the requirements to make such a designation as set forth in the Construction General Permit (CGP), and that the designee above meets the definition of a "duly authorized representative". Operator Name: A/ n , " ,Z�� Company: �/ 4fs ,T /1��.vf,-r Title: ✓�/.,..� Signature: Date: �/ f Av, 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 COMMONWEAL TH of VIR GINIA DEPARTMENT OF ENVIRONMENTAL QUALITY General Permit No.: VAR10 Effective Date: July 1, 2014 Expiration Date: June 30, 2019 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 this cover page, Part I - Discharge Authorization and Special Conditions, Part 11 - Stormwater Pollution Prevention Plan, and Part III - Conditions Applicable to All VPDES Permits as set forth herein. General Permit No.: VAR10 Page 1 of 23 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. 4. Impaired waters and TMDL limitation. Discharges of stormwater from construction activities to surface waters identified as impaired in the 2012 § 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 SWPPP that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations. In addition, the operator shall implement the following items: General Permit No.: VAR10 Page 2 of 23 a. The impaired water(s), approved TMDL(s), and pollutant(s) of concern, when applicable, shall be identified in the SWPPP; b. 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; c. 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 d. The applicable SWPPP inspection requirements specified in Part II F 2 shall be amended as follows: (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 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted on the next business day; and (2) Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to surface waters identified as impaired or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit. 5. Exceptional waters limitation. Discharges of stormwater from construction activities not previously covered under the general permit issued in 2009 to exceptional waters identified in 9VAC25-260-30 A 3 c are not eligible for coverage under this general permit unless the operator implements the following: a. The exceptional water(s) shall be identified in the SWPPP; b. 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; c. 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 d. The applicable SWPPP inspection requirements specified in Part II F 2 shall be amended as follows: (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 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted on the next business day; and (2) Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to exceptional waters. 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. General Permit No.: VAR10 Page 3 of 23 D. Prohibition of nonstormwater discharges. Except as provided in Parts I A 2, 1 C, and I E, all discharges covered by this general permit shall be composed entirely of stormwater associated with construction activities. All other discharges including the following are prohibited: 1. Wastewater from washout of concrete; 2. Wastewater from the washout and cleanout of stucco, paint, form release oils, curing compounds, and other construction materials; 3. Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance; 4. Oils, toxic substances, or hazardous substances from spills or other releases; and 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; 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 to the VSMP authority after one or more of the following conditions have been met: General Permit No.: VAR10 Page 4 of 23 a. Necessary permanent control measures included in the SW PPP 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 is responsible. When applicable, long term responsibility and maintenance requirements shall be recorded in the local land records prior to the submission of a notice of termination; 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 residential construction only, temporary soil stabilization has been completed and the residence has been transferred to the homeowner. 2. The notice of termination should be submitted no later than 30 days after one of the above conditions in subdivision 1 of this subsection is met. 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. Termination of authorizations 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 the notice of termination, whichever occurs first. 3. The notice of termination shall be signed in accordance with Part III K of this general permit. G. Water quality protection. 1. The operator must 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 B to adequately address the identified water quality concerns; b. Submit valid and verifiable data and information that are representative of ambient conditions and indicate that the receiving water is attaining water quality standards; or c. Submit an individual permit application in accordance with 9VAC25-870-410 B 3. All written responses required under this chapter must include a signed certification consistent with Part III K. General Permit No.: VAR10 Page 5 of 23 PART II STORMWATER POLLUTION PREVENTION PLAN 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. 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 A. 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 must develop the missing elements and include them in the SWPPP. Any operator that was authorized to discharge under the general permit issued in 2009, 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. A. Stormwater pollution prevention plan contents. The SWPPP shall include the following items: 1. General information. a. A signed copy of the registration statement, if required, for coverage under the general VPDES permit for discharges of stormwater from construction activities; b. Upon receipt, a copy of the notice of coverage under the general VPDES permit for discharges of stormwater from construction activities (i.e., notice of coverage letter); c. Upon receipt, a copy of the general VPDES permit for discharges of stormwater from construction activities; d. A narrative description of the nature of the construction activity, including the function of the project (e.g., low density residential, shopping mall, highway, etc.); e. A legible site plan identifying: (1) Directions of stormwater flow and approximate slopes anticipated after major grading activities; (2) Limits of land disturbance including steep slopes and natural buffers around surface waters that will not be disturbed; (3) Locations of major structural and nonstructural control measures, including sediment basins and traps, perimeter dikes, sediment barriers, and other measures intended to filter, settle, or similarly treat sediment, that will be installed between disturbed areas and the undisturbed vegetated areas in order to increase sediment removal and maximize stormwater infiltration; (4) Locations of surface waters; General Permit No.: VAR10 Page 6 of 23 (5) Locations where concentrated stormwater is discharged; (6) Locations of support activities, when applicable and when required by the VSMP authority, including but not limited to (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 purposes. 2. Erosion and sediment control plan. a. An erosion and sediment control plan approved by the VESCP authority as authorized under the 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. Any operator proposing a new stormwater discharge from construction activities that is not required to obtain erosion and sediment control plan approval from a VESCP authority or does not adopt department -approved annual standards and specifications shall submit the erosion and sediment control plan to the department for review and approval. b. All erosion and sediment control plans shall include a statement describing the maintenance responsibilities required for the erosion and sediment controls used. c. A properly implemented 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, adequately: (1) Controls the volume and velocity of stormwater runoff within the site to minimize soil erosion; (2) Controls stormwater discharges, including peak flow rates and total stormwater volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion; (3) Minimizes the amount of soil exposed during the construction activity; (4) Minimizes the disturbance of steep slopes; (5) Minimizes 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) Provides and maintains natural buffers around surface waters, directs stormwater to vegetated areas to increase sediment removal, and maximizes stormwater infiltration, unless infeasible; (7) Minimizes soil compaction and, unless infeasible, preserves topsoil; (8) Ensures that stabilization of disturbed areas will be initiated 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 General Permit No.: VAR10 Page 7 of 23 (9) Utilizes 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. New construction activities. 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. Any operator proposing a new stormwater discharge from construction activities that is not required to obtain stormwater management plan approval from a VSMP authority or does not adopt department -approved annual standards and specifications shall submit the stormwater management plan to the department for review and approval. b. Existing construction activities. Any operator that was authorized to discharge under the general permit issued in 2009, and that intends to continue coverage under this general permit, shall ensure compliance with the requirements of 9VAC25-870-93 through 9VAC25-870-99 of the VSMP Regulation, including but not limited to the water quality and quantity requirements. The SWPPP shall include a description of, and all necessary calculations supporting, all post - construction stormwater management measures that will be installed prior to the completion of the construction process to control pollutants in stormwater discharges after construction operations have been completed. Structural measures should be placed on upland soils to the degree possible. Such measures must be designed and installed in accordance with applicable VESCP authority, VSMP authority, state, and federal requirements, and any necessary permits must be obtained. 4. Pollution prevention plan. A pollution prevention plan that addresses potential pollutant -generating activities that may reasonably be expected to affect the quality of stormwater discharges from the construction activity, including any support activity. The pollution prevention plan shall: a. Identify the potential pollutant -generating activities and the pollutant that is expected to be exposed to stormwater; b. Describe the location where the potential pollutant -generating activities will occur, or if identified on the site plan, reference the site plan; c. Identify all nonstormwater discharges, as authorized in Part I E of this general permit, that are or will be commingled with stormwater discharges from the construction activity, including any applicable support activity; d. Identify the person responsible for implementing the pollution prevention practice or practices for each pollutant -generating activity (if other than the person listed as the qualified personnel); e. Describe the pollution prevention practices and procedures that will be implemented to: (1) Prevent and respond to leaks, spills, and other releases including (i) procedures for expeditiously stopping, containing, and cleaning up spills, leaks, and other releases; and (ii) procedures for reporting leaks, spills, and other releases in accordance with Part III G; (2) Prevent the discharge of spilled and leaked fuels and chemicals from vehicle fueling and maintenance activities (e.g., providing secondary containment such as spill berms, decks, spill containment pallets, providing cover where appropriate, and having spill kits readily available); General Permit No.: VAR10 Page 8 of 23 (3) Prevent the discharge of soaps, solvents, detergents, and wash water from construction materials, including the clean-up of stucco, paint, form release oils, and curing compounds (e.g., providing (i) cover (e.g., plastic sheeting or temporary roofs) to prevent contact with stormwater; (ii) collection and proper disposal in a manner to prevent contact with stormwater; and (iii) a similarly effective means designed to prevent discharge of these pollutants); (4) Minimize the discharge of pollutants from vehicle and equipment washing, wheel wash water, and other types of washing (e.g., locating activities away from surface waters and stormwater inlets or conveyance and directing wash waters to sediment basins or traps, using filtration devices such as filter bags or sand filters, or using similarly effective controls); (5) Direct concrete wash water into a leak -proof container or leak -proof settling basin. The container or basin shall be designed so that no overflows can occur due to inadequate sizing or precipitation. Hardened concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wastes. Liquid concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wash waters and shall not be discharged to surface waters; (6) Minimize the discharge of pollutants from storage, handling, and disposal of construction products, materials, and wastes including (i) building products such as asphalt sealants, copper flashing, roofing materials, adhesives, and concrete admixtures; (ii) pesticides, herbicides, insecticides, fertilizers, and landscape materials; and (iii) construction and domestic wastes such as packaging materials, scrap construction materials, masonry products, timber, pipe and electrical cuttings, plastics, Styrofoam, concrete, and other trash or building materials; (7) Prevent the discharge of fuels, oils, and other petroleum products, hazardous or toxic wastes, and sanitary wastes; and (8) Address any other discharge from the potential pollutant -generating activities not addressed above; 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 impaired waters, surface waters with an applicable TMDL wasteload allocation established and approved prior to the term of this general permit, and exceptional waters. The SWPPP shall: a. Identify the impaired water(s), approved TMDL(s), pollutant(s) of concern, and exceptional waters identified in 9VAC25-260-30 A 3 c, when applicable; b. Provide clear direction 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 I B 4 or Part I B 5. General Permit No.: VAR10 Page 9 of 23 6. Qualified personnel. The name, phone number, and qualifications of the qualified personnel conducting inspections required by this general permit. 7. Delegation of authority. The individuals or positions with delegated authority, in accordance with Part III K, to sign inspection reports or modify the SWPPP. 8. SWPPP signature. The SWPPP shall be signed and dated in accordance with Part III K. B. 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 must 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 must be accomplished as described in Part II G. 3. The SWPPP must clearly identify the contractor(s) 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 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 where modified as soon as possible; 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 11 F. General Permit No.: VAR10 Page 10 of 23 5. Amendments, modifications, or updates to the SWPPP shall be signed in accordance with Part III K. C. 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. D. SWPPP availability. 1. Operators with day-to-day operational control over SWPPP implementation shall have a copy of the SWPPP available at a central location on -site for use by those identified as having responsibilities under the SWPPP whenever they are on the construction site. 2. The operator shall make the SWPPP and all amendments, modifications, and updates available upon request to the department, the VSMP authority, the EPA, the VESCP authority, local government officials, or the operator of a municipal separate storm sewer system receiving discharges from the construction activity. If an on -site location is unavailable to store the SWPPP when no personnel are present, notice of the SWPPP's location must 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 C. 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. E. 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 must 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 F identifies a control measure that is not operating effectively, corrective action(s) 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 F identify an existing control measure that needs to be modified or if an additional 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 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. F. 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 insuring that the qualified personnel conduct the inspection. 2. Inspection schedule. a. Inspections shall be conducted at a frequency of: General Permit No.: VAR10 Page 11 of 23 (1) At least once every five business days; or (2) At least once every 10 business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted no later than the next business day. b. 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 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. c. 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 report required by Part II F. 3. Inspection requirements. a. As part of the inspection, the qualified personnel shall: (1) Record the date and time of the inspection and when applicable the date and rainfall amount of the last measurable storm event; (2) Record the information and a description of any discharges occurring at the time of the inspection; (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; General Permit No.: VAR10 Page 12 of 23 (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 channel, flume, 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 roads for minimizing sediment tracking; (5) Inspect areas that have reached final grade or that will remain dormant for more than 14 days for initiation of stabilization activities; (6) Inspect areas that have reached final grade or that will remain dormant for more than 14 days for completion of stabilization activities within seven days of reaching grade or stopping work; (7) 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 but is not limited to: (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 sediments 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 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 outside of the approved area to be disturbed; (8) Inspect pollutant generating activities identified in the pollution prevention plan for the proper implementation, maintenance and effectiveness of the procedures and practices; (9) Identify any pollutant generating activities not identified in the pollution prevention plan; and General Permit No.: VAR10 Page 13 of 23 (10) 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 location(s) of prohibited discharges; d. The location(s) of control measures that require maintenance; e. The location(s) of control measures that failed to operate as designed or proved inadequate or inappropriate for a particular location; f. The location(s) where any evidence identified under Part II F 3 a (7) exists; g. The location(s) where any additional control measure is needed that did not exist at the time of inspection; 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. The inspection report and any actions taken in accordance with Part II must 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. G. Corrective actions. 1. The operator shall implement the corrective action(s) 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. General Permit No.: VAR10 Page 14 of 23 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 must 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 individual(s) who performed the sampling or measurements; c. The date(s) and time(s) analyses were performed; d. The individual(s) who performed the analyses; e. The analytical techniques or methods used; and f. The results of such analyses. 2. The operator shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this general permit, and records of all data used to complete the registration statement for this general permit, for a period of at least three years from the date of the sample, measurement, report or request for coverage. This period of retention shall be extended automatically during the course of any unresolved litigation regarding the regulated activity or regarding control standards applicable to the operator, or as requested by the board. C. Reporting monitoring results. 1. The operator shall update the SWPPP to include the results of the monitoring as may be performed in accordance with this general permit, unless another reporting schedule is specified elsewhere in this general permit. 2. Monitoring results shall be reported on a discharge monitoring report (DMR); on forms provided, approved or specified by the department; or in any format provided that the date, location, parameter, method, and result of the monitoring activity are included. General Permit No.: VAR10 Page 15 of 23 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 modifying, revoking and reissuing, or terminating this general permit or to determine compliance with this general permit. The board, department, EPA, or VSMP authority may require the operator to furnish, upon request, such plans, specifications, and other pertinent information as may be necessary to determine the effect of the wastes from his discharge on the quality of surface waters, or such other information as may be necessary to accomplish the purposes of the CWA and the Virginia Stormwater Management Act. The operator shall also furnish to the board, department, EPA, or VSMP authority, upon request, copies of records required to be kept by this general permit. E. Compliance schedule reports. Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule of this general permit shall be submitted no later than 14 days following each schedule date. F. Unauthorized stormwater discharges. Pursuant to § 62.1-44.5 of the Code of Virginia, except in compliance with a state permit issued by the department, it shall be unlawful to cause a stormwater discharge from a construction activity. G. Reports of unauthorized discharges. Any operator who discharges or causes or allows a discharge of sewage, industrial waste, other wastes or any noxious or deleterious substance or a hazardous substance or oil in an amount equal to or in excess of a reportable quantity established under either 40 CFR Part 110, 40 CFR Part 117, 40 CFR Part 302, or § 62.1-44.34:19 of the Code of Virginia that occurs during a 24-hour period into or upon surface waters or who discharges or causes or allows a discharge that may reasonably be expected to enter surface waters, shall notify the Department of Environmental Quality of the discharge immediately upon discovery of the discharge, but in no case later than within 24 hours after said discovery. A written report of the unauthorized discharge shall be submitted to the department and the VSMP authority within five days of discovery of the discharge. The written report shall contain: 1. A description of the nature and location of the discharge; 2. The cause of the discharge; 3. The date on which the discharge occurred; 4. The length of time that the discharge continued; 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. General Permit No.: VAR10 Page 16 of 23 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 herein, 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 1 2. Unusual and extraordinary discharges include but are not limited to any discharge resulting from: 1. Unusual spillage of materials resulting directly or indirectly from processing operations; 2. Breakdown of processing or accessory equipment; 3. Failure or taking out of service of some or all of the facilities; and 4. Flooding or other acts of nature. I. Reports of noncompliance. The operator shall report any noncompliance which may adversely affect surface waters or may endanger public health. 1. An oral report to the department and the VSMP authority shall be provided within 24 hours from the time the operator becomes aware of the circumstances. The following shall be included as information that shall be reported within 24 hours under this subdivision: a. Any unanticipated bypass; and b. Any upset that causes a discharge to surface waters. 2. A written report shall be submitted within five days and shall contain: a. A description of the noncompliance and its cause; b. The period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and c. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. The department may waive the written report on a case -by -case basis for reports of noncompliance under Part III I if the oral report has been received within 24 hours and no adverse impact on surface waters has been reported. 3. The operator shall report all instances of noncompliance not reported under Part III 1 1 or 2 in writing as part of the SWPPP. The reports shall contain the information listed in Part III 12. NOTE: The reports required in Part III G, H and I shall be made to the department and the VSMP authority. Reports may be made by telephone, email, or by fax. For reports outside normal working hours, leaving a recorded message shall fulfill the immediate reporting requirement. For emergencies, the Virginia Department of Emergency Management maintains a 24-hour telephone service at 1-800-468- 8892. General Permit No.: VAR10 Page 17 of 23 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: For a corporation: by a responsible corporate officer. For the purpose of this chapter, a responsible corporate officer means: (i) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy -making or decision -making functions for the corporation; or (ii) the manager of one or more manufacturing, production, or operating facilities, provided the manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for state permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures; b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or c. For a municipality, state, federal, or other public agency: by either a principal executive officer or ranking elected official. For purposes of this chapter, a principal executive officer of a public agency includes: (i) the chief executive officer of the agency or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency. 2. Reports, etc. 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 General Permit No.: VAR10 Page 18 of 23 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 must be provided to the department and VSMP authority, if requested. 3. Changes to authorization. If an authorization under Part III K 2 is no longer accurate because a different individual or position has responsibility for the overall operation of the construction activity, a new authorization satisfying the requirements of Part III K 2 shall be submitted to the VSMP authority as the administering entity for the board prior to or together with any reports or information to be signed by an authorized representative. 4. Certification. Any person signing a document under Part III K 1 or 2 shall make the following certification: "I certify under penalty of law that I have read and understand this document and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." L. Duty to comply. The operator shall comply with all conditions of this general permit. Any state permit noncompliance constitutes a violation of the Virginia Stormwater Management Act and the Clean Water Act, except that noncompliance with certain provisions of this general permit may constitute a violation of the Virginia Stormwater Management Act but not the Clean Water Act. Permit noncompliance is grounds for enforcement action; for state permit 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 90 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. General Permit No.: VAR10 Page 19 of 23 Q. Proper operation and maintenance. The operator shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances), which are installed or used by the operator to achieve compliance with the conditions of this general permit. Proper operation and maintenance also includes effective plant performance, adequate funding, adequate staffing, and adequate laboratory and process controls, including appropriate quality assurance procedures. This provision requires the operation of back-up or auxiliary facilities or similar systems, which are installed by the operator only when the operation is necessary to achieve compliance with the conditions of this general permit. R. Disposal of solids or sludges. Solids, sludges or other pollutants removed in the course of treatment or management of pollutants shall be disposed of in a manner so as to prevent any pollutant from such materials from entering surface waters and in compliance with all applicable state and federal laws and regulations. S. Duty to mitigate. The operator shall take all steps to minimize or prevent any discharge in violation of this general permit that has a reasonable likelihood of adversely affecting human health or the environment. T. Need to halt or reduce activity not a defense. It shall not be a defense for an operator in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this general permit. U. Bypass. 1. 'Bypass," as defined in 9VAC25-870-10, means the intentional diversion of waste streams from any portion of a treatment facility. The operator may allow any bypass to occur that does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to ensure efficient operation. These bypasses are not subject to the provisions of Part III U 2 and 3. 2. Notice a. Anticipated bypass. If the operator knows in advance of the need for a bypass, the operator shall submit prior notice to the department, if possible at least 10 days before the date of the bypass. b. Unanticipated bypass. The operator shall submit notice of an unanticipated bypass as required in Part III I. 3. Prohibition of bypass. a. Except as provided in Part III U 1, bypass is prohibited, and the board or department may take enforcement action against an operator for bypass unless: (1) Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage. Severe property damage means substantial physical damage to property, damage to the treatment facilities that causes them to become inoperable, or substantial and permanent loss of natural resources that can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production; (2) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass that occurred during normal periods of equipment downtime or preventive maintenance; and (3) The operator submitted notices as required under Part III U 2. General Permit No.: VAR10 Page 20 of 23 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. V. Upset. 1. An "upset," as defined in 9VAC25-870-10, means an exceptional incident in which there is unintentional and temporary noncompliance with technology -based state permit effluent limitations because of factors beyond the reasonable control of the operator. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation. 2. An upset constitutes an affirmative defense to an action brought for noncompliance with technology - based state permit effluent limitations if the requirements of Part III V 4 are met. A determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance, is not a final administrative action subject to judicial review. 3. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation. 4. An operator who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs or other relevant evidence that: a. An upset occurred and that the operator can identify the cause(s) of the upset; b. The permitted facility was at the time being properly operated; c. The operator submitted notice of the upset as required in Part III I; and d. The operator complied with any remedial measures required under Part III S. 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 must be kept under the conditions of this general permit; 2. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this general permit; 3. Inspect and photograph at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this general permit; and 4. Sample or monitor at reasonable times, for the purposes of ensuring state permit compliance or as otherwise authorized by the Clean Water Act or the Virginia Stormwater Management Act, any substances or parameters at any location. For purposes of this section, the time for inspection shall be deemed reasonable during regular business hours, and whenever the facility is discharging. Nothing contained herein shall make an inspection unreasonable during an emergency. General Permit No.: VAR10 Page 21 of 23 X. State permit actions. State permits 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 permits. 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. General Permit No.: VAR10 Page 22 of 23 DEFINITIONS "Business day" means Monday through Friday excluding state holidays. "Commencement of land disturbance" means the initial disturbance of soils associated with clearing, grading, or excavating activities or other construction activities (e.g., stockpiling of fill material). "Construction site" means the land where any land -disturbing activity is physically located or conducted, including any adjacent land used or preserved in connection with the land -disturbing activity. "Final stabilization" means that one of the following situations has occurred: 1. All soil disturbing activities at the site have been completed and a permanent vegetative cover has been established on denuded areas not otherwise permanently stabilized. Permanent vegetation shall not be considered established until a ground cover is achieved that is uniform (e.g., evenly distributed), mature enough to survive, and will inhibit erosion. 2. For individual lots in residential construction, final stabilization can occur by either: a. The homebuilder completing final stabilization as specified in subdivision 1 of this definition; or b. The homebuilder establishing temporary soil stabilization, including perimeter controls for an individual lot prior to occupation of the home by the homeowner, and informing the homeowner of the need for, and benefits of, final stabilization. 3. For construction projects on land used for agricultural purposes, final stabilization may be accomplished by returning the disturbed land to its preconstruction agricultural use. Areas disturbed that were not previously used for agricultural activities, such as buffer strips immediately adjacent to surface waters, and areas that are not being returned to their preconstruction agricultural use must meet the final stabilization criteria specified in subdivision 1 or 2 of this definition. "Immediately" means as soon as practicable, but no later than the end of the next business day, following the day when the land -disturbing activities have temporarily or permanently ceased. In the context of this general permit, "immediately" is used to define the deadline for initiating stabilization measures. "Impaired waters" means surface waters identified as impaired on the 2012 § 305(b)/303(d) Water Quality Assessment Integrated Report. "Infeasible" means not technologically possible or not economically practicable and achievable in light of best industry practices. "Initiation of stabilization activities" means: 1. Prepping the soil for vegetative or nonvegetative stabilization; 2. Applying mulch or other nonvegetative product to the exposed area; 3. Seeding or planting the exposed area; 4. Starting any of the above activities on a portion of the area to be stabilized, but not on the entire area; or 5. Finalizing arrangements to have the stabilization product fully installed in compliance with the applicable deadline for completing stabilization. This list is not exhaustive. General Permit No.: VAR10 Page 23 of 23 "Measurable storm event" means a rainfall event producing 0.25 inches of rain or greater over 24 hours. "Stabilized" means land that has been treated to withstand normal exposure to natural forces without incurring erosion damage. Section 12. Inspection logs Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Pantops Corner SWPPP Gradinq Loq Inspection: Date Time Instructions: Fill out this sheet as grading events occur. Record grading events and their respective locations on this log. Summary: Event on record: Location(s) on Site: • Major Grading Activities: • Construction Activities Cease: o Temporarily: o Permanently: • Stabilization Measures Initiated: • Other Grading Activity Notes: Inspector Signature Date Operator Signature Date Pantops Corner SWPPP Inspection Log Inspection: Last Rainfall: Date Time Date Rainfall Amount Summary (requirements on back of sheet): Locations of: • Prohibited discharges • Controls needing maintenance • Failed controls: • Evidence that ESCP has not been properly implemented: • Additional measures needed: Corrective actions required: Unimplemented corrective actions from previous inspection: Inspector Signature Date Operator Signature Date "If this report does not identify any incidents of non-compliance, I certify that the construction activity is in compliance with the SWPPP and Construction General Permit." Inspections shall be completed at least once every 5 business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 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 discharging to exceptional waters. Where an inspection report does not identify any incidents of non-compliance, the report shall contain a certification that the construction activity is in compliance with the SWPPP and general permit. Inspection requirements: Describe discharges at time of inspection Record land -disturbing activities outside approved ESCP Inspect proper installation, maintenance needs, and effectiveness of: — Perimeter controls, such as silt fence — Soil stockpiles and borrow areas Completed earthen structures (dams, dikes, ditches, diversions, etc.) Cut and fill slopes Sediment basins and traps, sediment barriers, etc. Channels, flumes, slope drains, etc. Operational storm inlets — Construction vehicle access routes Areas at final grade or to remain dormant for more than 14 days: Initiate stabilization activities Complete stabilization activities within 7 days of stopping work Evidence that ESCP has not been properly implemented: 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; Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove sediments prior to discharge; Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that discharge to surface waters. Inlets and catch basins with failing sediments controls due to improper installation, lack of maintenance, or inadequate design are considered unprotected; — Sediment deposition on any property (including public and private streets) outside of the construction activity covered by this general permit; Required stabilization has not been initiated or completed on portions of the site; — 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; — 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 Land disturbance outside of the approved area to be disturbed Pollutant generating activities from PPP: implementation, maintenance, and effectiveness Pollutant generating activities not identified in PPP