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HomeMy WebLinkAboutWPO201900053 VSMP - SWPPP 2020-02-28of aL COUNTY OF ALBEMARLE Department of Community Development � 401 McIntire Road, North Wing '1 Charlottesville, Virginia 22902-4596 Tel. (434) 296-5832 • Fax (434) 972-4126 Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At: Project Name: Eco Village WPO 201900053 Address: 480 Rio Rd East Charlottesville, VA 22901 TMP 61-210 Prepared by: Shimp Engineering, P.C. Prepared for: Ecovillage Holdings, LLC SWPPP Preparation Date: 02/21/2020 (This document is to be made publicly available according to 9VAC25-880-70, Part II, section D) Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County CONTENTS: (from Albemarle County Code Sec. 17-405) 1. Registration statement 2. Notice of general permit coverage 3. Nature of activity 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 VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY FOR OFFICE USE ONLY GENERAL VPDES PERMIT FOR DISCHARGES OF STORMWATER FROM ID Number: CONSTRUCTION ACTIVITIES (VAR10) Technical Criteria: 1113 ❑ IIC ❑ REGISTRATION STATEMENT 2019 NEW ISSUANCE MODIFICATION WITH ACREAGE INCREASE ❑ Existing Permit Coverage Number (if applicable, VAR10####): Section I. Operator/Permittee Information. RE -ISSUANCE ❑ MODIFICATION WITHOUT ACREAGE INCREASE ❑ 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). Construction Activity Operator Name: ECO VILLAGE HOLDINGS LLC Contact person: Dave Redding Address: 480 Rio Rd East City, State, Zip Code: Charlottesville, VA 22901 Phone Number: 434-826-9505 Primary Email: hfcusa.org@gmail.com CC Email: keane@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 0 NO ❑ Rev 04/2019 PAGE 1 17 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019 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: Address: 480 Rio Rd East City and/or County and Zip Code: Charlottesville, VA 22901 Latitude and Longitude (6-digit, decimal degrees format): 38.048640,-78.465458 C. Construction Activity Entrance Location (description, street address and/or latitude/longitude in decimal degrees): 38.048640,-78.465458 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 may 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. 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 6.53 ac Management Plan): Primary estimated area to be disturbed (portions with Erosion and Sediment Control Plan approval only): 5.90 ac Offsite estimated area to be disturbed (if applicable): C. Property Owner Status: B. Estimated Project Dates (M M/D D/YYYY) Start date: 01/01/2020 Completion date: 01/01/2021 FEDERAL ❑ STATE ❑ PUBLIC ❑ PRIVATE 0 D. Nature of the Construction Activity Description (i.e. commercial, industrial, residential, agricultural, residential environmental): E. Municipal Separate Storm Sewer System (MS4) name (if discharging to a MS4): n/a Rev 04/2019 PAGE 2 17 CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019 F. Is this construction activity part of a common plan of development or sale? YES ❑ NO ❑ G. 6t" 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 VESCP Authority for review? YES 0 NO ❑ Erosion and Sediment Control Plan Approval Date (for estimated area to be disturbed).: C. Has land disturbance has commenced? YES ❑ NO 0 D. If this project is using 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.): SEE THE FOLLOWING PAGE FOR SIGNATURE AND CERTIFICATION REQUIREMENTS AND INFORMATION Rev 04/2019 PAGE 3 1 7 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 III. K must physically sign this certification. A typed signature is not acceptable. Please note that operator is defined in 9VAC25-870-10 as follows: "Operator" means the owner or operator of any facility or activity subject to the Act and this chapter. In the context of stormwater associated with a large or small construction activity, operator means any person associated with a construction project that meets either of the following two criteria: (i) the person has direct operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications or (ii) the person has day-to-day operational control of those activities at a project that are necessary to ensure compliance with a stormwater pollution prevention plan for the site or other state permit or VSMP authority permit conditions (i.e., they are authorized to direct workers at a site to carry out activities required by the stormwater pollution prevention plan or comply with other permit conditions). In the context of stormwater discharges from Municipal Separate Storm Sewer Systems (MS4s), operator means the operator of the regulated MS4 system. 9VAC25-880-70. Part III. K. Signatory Requirements. Registration Statement. All Registration Statements shall be signed as follows: a. For a corporation: by a responsible corporate officer. For the purpose of this chapter, a responsible corporate officer means: (i) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy -making or decision -making functions for the corporation; or (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 forstate 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 fqr _} owing violations." Printed Name: Signature (signed in ink): Date: Section VII. Submittal Instructions. Submit this form to the Virginia Stormwater Management Program (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@dea.virginia.gov If the locality is the VSMP Authority, please send to: The Local VSMP Authority insert address below Rev 04/2019 PAGE 4 1 7 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 Section 3. Nature of activity EXISTING CONDITIONS: THIS SITE IS A DEVELOPED BUT MOSTLY WOODED LOT OFF RIO RD EAST IN ALBEMARLE COUNTY. THIS PROPERTY IS BORDERED ON THE EAST AND SOUTH BY RIO ROAD EAST. THE PROPERTY IS BORDERED ON THE WEST AND NORTH BY DEVELOPED, PARTIALLY WOODED LOTS. THE PROPERTY IS CHARACTERIZED BY SLOPING TERRAIN, ESPECIALLY AT THE PERIMETER. PROPOSED DEVELOPMENT: THIS SITE WILL BE DEVELOPED INTO A MULTI -UNIT COMMUNITY. IT WILL HAVE 36 SINGLE- AND MULIT-FAMILY UNITS THAT WILL BE CLOSELY CONSTRUCTED TO FORM AN ECO-FRIENDLY SUSTAINABLE MODERN NEIGHBORHOOD. THE DEVELOPMENT WILL HAVE FULL ONSITE NUTRIENT TREATMENT PROVIDED BY A MIX OF BMPS. THE TOTAL AREA OF DISTURBANCE IS 5.90 ACRES. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 4. Erosion and Sediment Control Plan. THE FOLLOWING ARE THE PROPOSED MANAGEMENT STRATEGIES AND DETAILED SEQUENCE OF CONSTRUCTION: STAGE 1 1. INSTALL CONSTRUCTION ENTRANCES OFF RIO ROAD AS SHOWN ON C8. INSTALL SILT FENCE SHOWN. 2. INSTALL STORM SEWER "SECTION A". REFER TO C14 FOR OFFSITE STORM. 3. WHEN OFFSITE STORM HAS BEEN INSTALLED, INSPECTED, AND STABILIZED, REMOVE CONSTRUCTION ENTRANCE ON PARCEL A 1 A. 3. INSTALL DIVERSIONS, SILT FENCE, INLET PROTECTION, & SEDIMENT BASIN. 4. CONTACT DESIGN ENGINEER AND THEN COUNTY INSPECTOR FOR INSPECTIONS. 5. WHEN ALL PARTIES HAVE APPROVED FIELD CONDITIONS, BEGIN MASS GRADING, STARTING AS SHOWN ON SHEET C8. 6. MAINTAIN PERIMETER CONTROLS DURING TRANSITION INTO STAGE 2. STAGE 2 1. MOVE CONSTRUCTION ENTRANCE TO NEW LOCATION SHOWN ON SHEET C9 AFTER STAGE 1 AREA IS GRADED. 2. INSTALL ADDITIONAL PERIMETER CONTROLS AS SHOWN AS GRADING PROCEEDS. CONTACT DESIGN ENGINEER TO INSPECT AND CONFIRM PROPER INSTALLATION. 3. INSTALL UTILITIES AND GRADE ROAD AREAS. 4. MASS GRADING SHOWN ON THIS SHEET REPRESENTS INTERMEDIATE GRADES AND CAN BE ADJUSTED IN THE FIELD. 5. MAINTAIN SEDIMENT BASIN UNTIL ALL UPSTREAM AREAS ARE STABILIZED. CONTACT BOTH DESIGN ENGINEER AND COUNTY INSPECTOR BEFORE BASIN IS REMOVED. STAGE 3 1. INSTALL SILT FENCE WHERE NEEDED FOR ANY FINAL PERIMETER GRADING (PRIMARILY FOR REMOVAL OF SEDIMENT BASIN AND DIVERSIONS ALONG THE PERIMETER) 2. AFTER SEDIMENT BASIN IS REMOVED, INSTALL STORMTECH BMP AND LOWER PARKING AREA. DO NOT INSTALL STORM CARTRIDGES UNTIL SITE HAS BEEN ENTIRELY STABILIZED AND SYSTEM HAS BEEN CLEANED OUT. 3. WHEN SITE HAS BEEN STABILIZED, HOUSE CONSTRUCTION MAY BEGIN. 4. DURING HOUSE CONSTRUCTION, AREAS THAT ARE NOT BEING DISTURBED MUST REMAIN STABILIZED. INSTALL SILT FENCE PROTECTION FOR LOTS UNDER CONSTRUCTION. 5. IMPORTANT: RAIN GARDENS SHALL BE INSTALLED LOT BY LOT. DO NOT INSTALL RAIN GARDENS UNTIL EACH RESPECTIVE HOUSE HAS BEEN CONSTRUCTED. THE RAIN GARDEN UNDERDRAINS SHALL BE CONNECTED TO THE STORM DRAINS WITH INSERTA-TEES AS THE FINAL STEP OF LOT CONSTRUCTION. CONTACT DESIGN ENGINEER FOR INSPECTIONS OF THE RAIN GARDENS. 6. DO NOT INSTALL BIOFILTERS UNTIL ALL UPSTREAM AREAS ARE PERMANENTLY STABILIZED. FINAL 1. MAINTAIN CONTROLS UNTIL SITE STABILIZATION AND COUNTY INSPECTOR HAS APPROVED CONTROL REMOVAL. 2. ANY SEDIMENT THAT ENTERS BMPS FROM CONSTRUCTION MUST BE CLEANED OUT BY CONTRACTOR. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County V51VIP PLAN FOR EXIST LEGEND NEW DESCRIPTION 16'TC x t2'TC TOP OF CURB ELEVATION 16a x 12. SPOT ELEVATION 16'7W x 12'TW TOP OF WALL ELEVATION 16'BW x t2BW BOTTOM OF WALL ELEVATION BENCHMARKS STORM SEWER ROOF DRAIN SEWER LINE -ew- -c.- WATER LINE GAS LINE OVERHEAD ELECTRIC. WIRE -ua- ucc UNDERGROUND ELECTRIC. - -a•*- OVERHEAD TELEPHONE LINE UNDERGROUND TELEPHONE LINE ID I- DRAIN INLET (DI) ® ® STORM/SANITARY MANHOLE L L PLUG ®1M0 WATER VALVE & BOX { FIRE HYDRANT ® ® WATER METER LIGHT POLE �- UTILITY POLE PROPERTY LINE ADJACENT PROPERTY LINE VACATED PROPERTY LINE -0 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 -300- -DO- INDEX CONTOUR CG-2 CG-2 STANDARD 6" CURB CG-6 CC -Fe COMBINATION 6" CURB & GUTTER CONCRETE PAVEMENT / SIDEWALK RIPRAP ASPHALT GRASS EC-2 MATTING EC-3 MATTING WETLAND 10 to PARKING COUNT I1111111 I1111111 CROSSWALK X����� HANDICAP ACCESSIBLE AISLE ® ® CG-12 & HANDICAP PARKING NOTE:THE SIZE OF THE SYMBOLS MAY VARY FROM WHAT 15 SHOWN ECOVILLAGE CHARLOTTESIVILLE TMP OG 1 00-00-00-2 1 000 WFO 201900053 RIO D15TRICT, AL13EMARLE COUNTY, VIRGINIA VICINITY MAP SCALE: -I =500• � O CharlG�v€14e Hlgh /!y .� SG I::SEadium Y Ra 146E ''ck Tayinr's Auto Body Shop SITE1� Jldvantage Home A 1 CDotracting l� GharlGttesvltlle " 2 9t " ry 4 ,p E AH ° p¢ 6Tf L IMAGE PROVIDED BY GOGGLE MAPS SHEET INDEX C I - COVER SHEET C2 - EX. CONDITIONS � DEMO PLAN C3 - 51TE LAYOUT C4 - GRADING PLAN C5 - UTILITY PLAN CG - UTILITY PLAN C7 - E5CP NARRATIVE C8 - E5CP PHASE I C9 - E5CP PHASE 2 CIO - E5CP PHASE 3 C I I - PERMANENT 5WM PLAN C 12 - E5CP DETAILS C 1 3 - E5CP DETAILS C 14 - STORM PROFILES C 1 5 - BIOPILTER * OPP5ITE SEWER DETAILS CIG - 5TORMTECH � DAYFILTER DETAILS C 1 7 - 5TORMTECH * BAYFILTER INSTALLATION C 18 - BAYFILTER * 5TORMTECH MAINTENANCE C 1 9 - BIOPILTER * RAIN GARDEN NOTES ANNUAL RAIN GARDEN & BIOFILTER INSPECTION CHECKLIST IT IS HIGHLY RECOMMENDED THAT A SPRING MAINTENANCE INSPECTION AND CLEANUP BE CONDUCTED AT EACH elORETENTION FILTER. THE FOLLOWING IS A LIST OF SOME OF THE KEY MAINTENANCE PROBLEMS TO LOOK FOR: CHECK TO SEE IF 75% TO 907 COVER (MULCH PLUS VEGETATIVE COVER) HAS BEEN ACHIEVED IN THE BED, AND MEASURE THE DEPTH OF THE REMAINING MULCH. CHECK FOR SEDIMENT BUILDUP AT CURB CUTS, GRAVEL DIAPHRAGMS OR PAVEMENT EDGES THAT PREVENTS FLOW FROM GETTING INTO THE BED, AND CHECK FOR OTHER SIGNS OF BYPASSING. CHECK FOR ANY WINTER- OR SALT -KILLED VEGETATION, AND REPLACE IT WITH HARDIER SPECIES. NOTE PRESENCE OF ACCUMULATED SAND, SEDIMENT AND. TRASH IN THE PRE-TREATMENT CELL OR FILTER BEDS, AND REMOVE IT. INSPECT BIORETENTION SIDE SLOPES AND GRASS FILTER STRIPS FOR EVIDENCE OF ANY RILL OR GULLY EROSION, AND REPAIR IT. CHECK THE BIORETENTION BED FOR EVIDENCE OF MULCH FLOTATION, EXCESSIVE FUNDING, DEAD PLANTS OR CONCENTRATED FLOWS, AND TAKE APPROPRIATE REMEDIAL ACTION. • CHECK INFLOW POINTS FOR CLOGGING, AND REMOVE ANY SEDIMENT. LOOK FOR ANY BARE SOIL OR SEDIMENT SOURCES IN THE CONTRIBUTING DRAINAGE AREA, AND STABILIZE THEM IMMEDIATELY. CHECK FOR CLOGGED OR SLOW -DRAINING SOIL MEDIA, A CRUST FORMED ON THE TOP LAYER, INAPPROPRIATE SOIL MEDIA, OR OTHER CAUSES OF INSUFFICIENT FILTERING TIME, AND RESTORE PROPER FILTRATION CHARACTERISTICS. OWNER / DEVELOPER OWNER/DEVELOPER: ECOVILLAGE HOLDING INC 480 RIO ROAD EAST CHARLOTTESVILLE VA, 2290' MAGISTERIAL DISTRICT ZONING "i I 1IL, SOURCE OF TITLE DO 4582 PC 174 TMP 06100-00-00-21000 BENCHMARK IRON & CAP BENCHMARKS SET THROUGHOUT SITE, SITE DATUM NAVDS8. SOURCE OF BOUNDARY & TOPO BOUNDARY AND TOPOGRAPHIC INFO FOR TMP 61-21 FROM A FIELD SURVEY PERFORMED BY ROGER W. RAY & ASSOC. INC ON AUG 23, 201& BOUNDARY AND TOPOGRAPHIC INFO FOR TMP 61-AlA (OFFSITE PARCEL) FROM A FIELD SURVEY PERFORMED BY NIXON LAND SURVEYING, LLC ON DEC. 12, 2016. BUILDING HEIGHT 35' BY RIGHT PROPOSED THREE STORY UNITS (VARIABLE HEIGHTS 35' OR LESS) SETBACKS 5-25' FRONT SETBACK 20' REAR SETBACK 5-10' SIDE SETBACK LIGHTING NO OUTDOOR LIGHTING IS PROPOSED ON THE INITIAL SITE DEVELOPMENT PLAN. TRASH REMOVAL LOCATION OF TRASH TOTER STORAGE NOTED ON SITE LAYOUT (C3) TRIP GENERATION USE DESCRIPTION 11TE Qty in out total in out total Townhomes(Mid-Rise) 1 2211 271 21 71 91 7 4 11 Sing le Family Homes 210 11 2 6 81 7 4 11 1 u SLOPES THIS SITE CONTAINS 4,199 SF OF MANAGED STEEP SLOPES AND 41,772 SF OF PRESERVED SLOPES PER FIELD SURVEY. 9,866 SF OF PRESERVED SLOPES OVERLAY WAS SURVEYED AT LESS THAN 15% AND DO NOT QUALIFY AS PRESERVED SLOPES. GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR. GENERAL CONSTRUCTION NOTES 1. PRIOR TO ANY CONSTRUCTION WITHIN ANY EXISTING PUBLIC RIGHT-OF-WAY, INCLUDING CONNECTION TO ANY EXISTING ROAD, A 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 OCCUR THE REQUIREMENTS OF THE PERMIT SHALL GOVERN, 2, ALL MATERIALS AND CONSTRUCTION METHODS SHALL CONFORM TO CURRENT SPECIFICATIONS AND STANDARDS OF VDOT UNLESS OTHERWISE NOTED. 3. EROSION AND SILTATION CONTROL MEASURES SHALL BE PROVIDED IN ACCORDANCE WITH THE APPROVED EROSION CONTROL PLAN AND SHALL BE INSTALLED PRIOR TO ANY CLEARING, GRADING OR OTHER CONSTRUCTION. 4. ALL SLOPES AND DISTURBED AREAS ARE TO BE FERTILIZED, SEEDED AND MULCHED. 5. THE MAXIMUM ALLOWABLE SLOPE IS 2:1 (HORIZONTAL: VERTICAL). WHERE REASONABLY OBTAINABLE, LESSER SLOPES OF 3:1 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. & 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). SWM FOREST / OPEN SPACE 1.06 ACRES OF SWM FOREST AND OPEN SPACE SHALL BE DEDICATED AS PART OF THE SWM STRATEGY. THE SWM FOREST AND OPEN SPACE EASEMENT IS SUBJECT TO THE GUIDANCE SET FORTH BY THE DEO IN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM. THE AREAS WILL REMAIN IN A NATURAL VEGETATIVE STATE, EXCEPT FOR ACTIVITIES AS APPROVED BY THE LOCAL PROGRAM AUTHORITY, SUCH AS FOREST MANAGEMENT, CONTROL OF INVASIVE SPECIES, REPLANTING AND REVEGETATING, PASSIVE RECREATION (E.G. TRAILS), AND LIMITED BUSH HOGGING TO MAINTAIN DESIRED VEGETATIVE COMMUNITY (BUT NO MORE THAN 4 TIMES A YEAR). EXISTING USE 2 SINGLE FAMILY HOMES PROPOSED USE 27 TOWNHOMES. 11 SINGLE FAMILY HOMES, & 1 GUEST LODGING UNIT: 39 UNITS TOTAL PROPOSED RESIDENTIAL DENSITY: 39 UNITS / 6.53 AC - 6.0 DU/ACRE SITE AREA=6.53 AC (INCLUDES INTERIOR LOT TO BE ADDED TO PARENT PARCEL) BASE R4 DENSITY: 4 UNITS/AC = 6.53 X 4 = 26.1 UNITS BASE COUNT. DENSITY BONUSES; SEC. 15.4.1: 10% AREA PRESERVED OPEN SPACE: 5% OF 26.1 = 1.3 UNITS ADD'L. SEC. 15.4.2: 7.5% AREA DEDICATED TO PUBLIC. USE: 15% OF 26.1 - 3.9 UNITS ADD'L. SEC, 15.4.3: 50% OF UNITS AS AFFORDABLE UNITS: 30% OF 26.1 - 7.8 UNITS ADD'L. TOTAL COUNT: 26.1+1.3+3.9+7.8 = 39.1 UNITS LAND USE SCHEDULE EXISTING AREA % PROPOSED AREA BUILDING 3,605 SF 1.3% BUILDING 35,830 SF 12,67 PAVEMENT 18.175 SF 6.4% PAVEMENT 39,204 SF 13.8% TOTAL IMPERVIOUS 21,782 SF 7.7% .SIDEWALK 23847 SF 84% OPEN SPACE 262 507 BE 92.37 TOTAL IMPERVIOUS 98,881 SF 34.8% TOTAL- 284,289 SF (6.53 AC.) OPEN SPACE 185.408 SF 65.2% LIMITS OF DISTURBANCE: 5.90 AC TOTAL= 284,289 SF (6.53 AC.) WATERSHEDS I SITE LIES WITHIN THE MEADOW CREEK WATERSHED. PARKING REQUIRED PARKING: 75 SPACES RESIDENTIAL 2 SPACES/UNITS PER UNIT - 72 SPACES TOURIST/TRANSIENT LODGING: 1 FOR EACH OF 3 ROOMS - 3 SPACES PARKING PROVIDED: 75 SPACES -64 STANDARD SURFACE SPACES FOR RESIDENTS (INCLUDES 2 HC VAN SPACES) -8 SPACES IN DRIVEWAYS FOR 8 UNITS -3 SPACES PROVIDED FOR TOURIST/TRANSIENT LODGING (INCLUDS 2 HC VAN SPACES) FLOOD ZONE ACCORDING TO THE FEMA FLOOD INSURANCE RATE MAP, EFFECTIVE DATE FEBRUARY 4, 2005 (COMMUNITY PANEL 51003CO287D), THIS PROPERTY DOES NOT LIE IN A ZONE A 100-YEAR FLOOD PLAIN. GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS 1, 1HE PLAN APPROVING AUTHORITY MUSI BE NOTIFIED ONE W EK PRIOR TO THE PRE-CONSIRUCIION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND. MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4, A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TMES, 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FDR INSTALLATION OF ANY ADDITONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL RNAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMABLE. 14. BORROW, FILL OR WASTE ACIIMTY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7: OOAM TO 9:OOPM. 15, BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS; AND DAMAGE TO ANY PUBLIC STREET BECAUSE 0 SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR, 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF, INCORPORATED INTO THE TOP 4-5 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/10DSF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19, MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20, ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 21. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTOR 17-204G.) 22. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER THE DATE THE [AND DISTURRING. ACTIVITY COMMENCNO. (WATFR PROTECTION ORDNANCE SECTION 17-207R) SHED � � ro Z j I 161 n XXX �"Itime I wwsa w I, a J i�jP„ A \ t, IMP 61-189B \ VANDERLINDE. LINDA BURTON OR \ MP 61A-02-36 / I / 8 / /�/j ="�\ \ T / PHILIP JEFF BUSHMAN LDv y�D OF CHARLOTTESVILLE / I Z / r RERrCH RN r% / 1 8 rm I h l l I' D.B. 2792 P. �7D /' H/EOWNERS ASSOC., INC. I F/ q;uq / / IRON IT IfNSTR.NO- 201300001Y I m aTN HSG A Ii�;- --i \ IMP 61-190 / <I 1ill/ IN�r= a9a ' IBM RR SPIKE / , / ,�hl to • I I// //� X`� \�`� __ I _ ' HAROLD K. HERZ BENCHMARK= / F ♦ r I �- -_ I / ELEV=349.12' LILA R. HEYMAN / ' %LI IR AND CAP SET D.B. 3143 P. 274 �/ „PIN AnoN= 3Eas4 /' \ � /, / � / y � ,♦t' � , �,/ �' / � II II II I, 90 F� � /'vl E '� c / ,// { / F /,♦ \ I/� I �� \` \� w m ro S w t* / // g / ,' /'/ I e l1 w � Ir I � � // / t Fa/ r� h�`�,r r 9 13>a of w�`•fi�fQ�\`\�=\ __ ` �I Q w � i ' ���-- �� / �il��oa.,a�. time. °uT I// /u ♦ N � II I III ' j---''': �i�TW a ' / '/l 'J✓ al � �11 f � '//"".'�'" I TMP-6'L�2Y98� r Op / �/ /� \ f ill1� I I I m a �,-) ✓ I I `vv /, �2:95(?�AO✓ f��� /. EEa��w / /'/t//1m �Lj.flrl 3� I v I IW#e-�98 p k7LIYE�y KUrYTN@R I .�I _ ' S I t I // / / '//i g avPy r' 1✓' NSTk.y6. 1p9 241 i U N M. SHIMP I I I I a l It I I ic. No,. 45163 i / 1zmrE \OVERHEADm i 'F ' �APaeoxiMAre`�LocArlo uTlunes To BE r % i / ROE° _ INSTALLED UNDERGROUND F 1 -Gl�1� �4 �¢ \ BEGINNING AT THIS POLE. � — / x / � OF FLOOD ZONE AE PER 1 as i ';' �°R� ------ �OFFSITE DISTURBANCE DETAIL �y---- 1 2 INE amp NOTE: MANAGED SLOPES ONLY I h � - �� SHOWN ON THIS SHEET SINCE THEY -- ' LIMITS OF HAVE NO EFFECT ON THIS PLAN. I TMP 61-188A , - �\ QUARLES, FAMES B _ JI ■ - / /�,// �° A 47R' D.B. 4537 P. 279 DISTURBANCE: 5.90 ACRES _IAl' gl <. � m �G, I'P o�lc,.lr vl I/I r r r r �/ g,4 f� i �m E. P tn"' E E l J: ',�m✓'� `v I mme°v�1 r I r I I BE+fcHN Rpa I III I / /fMP 61r210 ' 'i PCn a F.r . X IRDN,AN T I I / s ,.' `. `*/g, `�___ / 1s ap E e� 13�17 / Ut \ y COVI�LAGE VOLDIN GS. � � / I Pms, TPI - IMP 610-188B -I (JB 4582 P� '(4 I / o I - i \7 _ SPAAR. ALBERT PETER III OR I j Lill 6.3p2 ACC o I /`g _ LISA RUSS 1 '�I µ T I\ Yp 1 f ` o _ _ I ' - __ __ - U.S 2063 P. 16 m � v w �-� d� � �> �L - _ �I ��•is���llIv � ��,�p'F MANAGED SLOPES III I m I �� 6 v �' V A a3o �.' ��- -- IT o I A I�`o E, �p �N,`V. I \ Ilk! mod` 40O 9 - t 1% WAVED I v4� \ 'Iu`, m 11 I l o vv yo• ` �, Ii', �V ram, I i l ggV"�r.1- __ RIPE I \ i cp'I pN \ I I i µ F 4 � \ "\1 r_��♦y \ I 1 ra 1 cam, \\^O y�O' `� l j / I I�� ARK- MACEHUBMNAIL SET I ''SS _ \ \ \ <y qC Nam• Y --, J'-___� __ ` v I �.��`�2 I �``j CONNECT UNDERGROUND UTILITIES BACK q0 RIP\ \ \ I I f' qy \1 �\ II 0 \ °h P S' \ 1 P+ Aw�i-• \ Iw�,,.- \W �r __ IN ROOT OF 12" OAK o I v _ ELEvnnGN= a7os7 TO OVERHEAD UTILITIES AT THIS POLE. v �n ,� rnave.TE Irn v I I 4�0 PPP A I vI \. v _ I I MI�•�� I v 'a ___� _*�. 1 III II (i i i _ I _ « L—Y—„��—ul—..�}_, h Qi rL -R�E �" �• Is 18` BENCH M K= III ,i., I I/ I A vv p6, I a s 11 1I �i_ >/ )1 \ \ I I \ I P j yml¢:., 1 'u��._w "------ w yA lyw y�y ♦� NAG HUB AIL SET i /� ` •`- Fj'/\/'�/_ 'i9P 387 B4 I I+ P IN8ET4 oW ` \\ 1 /Y•� I N— / / �I 1 II II I I �� o �Ty "��'. II 1 y 1 �W-470 INo� ROOT OF HACKBERRY i TMP 061 A1-01-09-00100 =Af 5,o ELEVAT N= 4]1.36 SPAAR, ALBERT PETER III OR .' 1NV SSIg II I NV=39 5nn�� I Y/ / , SS i / r I I I I �G E'\ P yA� 1 I e \ ♦ LISA RUSS I _AC I ='3i 1 I 'T; \� \ I / r l P l r 1 I / r" �• ` G �� D.B 379fi P. 746 � N"4• "r' 'TMP 61A-201A TO BE ADDED TO PARENT IONv I�� >16 P I♦ ..� y _ Ra �-c 9P �- --- ` ' 7/L61-ape III I �'/ sS•� / i I =no' I >^', I'=. v p. v s �� s ►�„� _ oalvE €__ II .fSLI�£ C�ILYTyERi Y PARCEL TMP 61-210 PARCEL A-1 d vm II w ) a' PORrION of N. B NSFk.g6. 109 24L4)' /Ir/ SIP, a.^ >.��w ���00 �' f I� �I T a a�°��•♦ -_ o' I _ / < '/ t d bm GE HOLDIN IN ---- _ 47Dy I / / I .°� f✓D 21 P , '^ / / I f I *�� [EC ILLAI E�vv-___-___ P- XIMATELOCATION ,/ I /. / - I A. � 'A HotDlt 'a' q /� �. Ise° ., o�, DB p582 PG 17,4 8 ♦ ---_ -v -, y. Nx--!I 9R$ ERR qsyo ,OD ZONE AS PER / II / ' �' / \ " B NCHMA 1" d _ G 4 P,�Y I F d I A 42 __ _ - oc �° tea. -e O I / / / I / II t E R1f' "NAP 5g2� 12 ss 6.3 ACV, -v ----------- 41''� D.B 421 Y II EkEVATIQl1 40 ]3 ��' i' �� 1A I / v I • M_APiEI.i ♦- -� _?\ o� I I SPENCER, MARVIN / x I i / ' ( I I 1 r �.'� �/'?I ' ' 06' p.B. 112Y 116 P P / _ _00, i / � i a' I � ��z ate- III, / / ,' I J I III / om N p, j ✓ I `w�',e I � '/ � i I 1 � � <e i Sp .�`� \ �pBPt _ �� POPLAR`r MAPLE " • %PA i / / / ' r �/ / /' i Pi , �'.% // N d ,46 . M LE Sb z_,S,ALN iI i I i I I Iwo I I / �� i �o I P� o Ro� �.�P _ - oP`--------------� r -_-- i Pg'i _ � _= �- � •� 5za r1i11111 I I I 11 III OI / / %/$ // / 51l'D2 fo'� \ y", '-•Gall F * Yo r/}i �m I �♦ I 'a '/ �� ET _c "ATE ROUT - _�� ww1IZIIIDDS •' \� `�. P 2-STORY FRAME "m' _JI I I I / l Ic+ l �n / �9 '"� + ♦ ','�' 5 E 6 �__ - `c:HE Y TREE•• V=a44.]] 0� \\ RIO ROAD 37 RR s t % /F 5_ \ �� EAST I I� o A DEMO TREES IN �v � I ®` ca' I • r I INN= I ,�a"o'-- n s / _ _ i' - - BENCHMARK fe' II 11 i INC l 1'\�ryI\ I I N �r 9 y WALNUT \ �s 'r �__�___ _______�__—__—___II ELEVATION=. I I I 1 I a � �/ s ✓ � A 5+y ♦A BOLD (TYP.) Z� I � MAG NAIL SET IN P 1 1 I Y/ l/ /I c / / m 1, 21 �' i' o V II I I I I I I II IOA IV �1�`IAI� II II I I I 'I 47D r �I �� 'r ♦ % I P // / 1 1 't•, W W 1 u H SG A - I/ 1 n �`I ITERR9 N, / i i �- ��\ '\. `v m w ,� a to �Iv I �. I 4 s�,' PRESERVED SLOPES �..'. I i i i I I I vAF ` v s', I pw, r- �i� ♦� r o // - �'3 �.� 41�� A wo �V `v�` � �, 1y.�.h'V II �i �-�i� n ` FM r Iv � �F � /,' �� � _ I u. J a\ i / I AI I I I 9� II II �` •� ,P \ aV \� �-,� I off. i ✓i'i i-''V `�%�� M �� INV 434.29 \\ \\ 0 IMP 61A-1 BROOKS, CARLTON R REV T/A & BETTY W BROOKS CC D B. W5124 P. 638 LEGEND d L �°����`�uAc E 'e_vr_ - �✓ ���v_ \ �;. SOIL TYPE BOUNDLu ARY O m CITY IMP 47A-150 �I -- ° 1"-\ ',�, —_ ---_ - __ ___=====1--===_= "� "—' ; / N V J 70—\ _-------� - ,-430 _-- -------------------_- , I / > W �r.� DEMO ALL EX. STRUCTURES Date I 41p a ��s \ rE /INE otiw /wv=a2Q�p,TE rR0UTE 631 EXCEPT THIS BUILDING. / 09 23/2019 o S cale N \ P _" / r '�// 40 0 40 gp 120 Sheet No. PRESERVED SLOPES INv 41e22C2 OF 19 SURVEYED < 25% \ Scale: T"=40' File N, CITY IMP 47A-150 16.009 -OP E)q SPTCk- Li J/ RESIDENTIAL UNITS r 27 TOWNHOMES (TH) „ 5 11 SINGLE FAMILY HOMES (SF) 1 GUEST LODGING 39 TOTAL UNITS 14'REKRA i ` P'H / Cc-6 r yQP \ NEW CONCRETE RET. WALL. 5' MAX HEIGHT W, 42" HANDRAIL ®. ,� 4 � m --- \ I� �Lr?h�00 O MAX. SETBACK N o x �, \ R2o' ,�60 A MU MIN. SETBACK <nUSFP (TYP.) TRAIL/ACCESS TE EDI D ESMT CAD To DEDICATED LIC USE ATE ,UA Q A 1 ROW \ \ Ri gIs<ay,5' oyd O s eA 1 MOGTiust Rlq� 0 � � z^�` Pf ST O \ PP.) _` .� /RAI / � � €� '� I- BIi�sTORACE (s) � -\ rACSA UTIL 1 ESMT (TYP.) �=h 28 3841 1`` EW S GM NTAL 5' M X EIGH AC , AV 4'. 2 GU A R IL R T ALL.. S / II • I I �r / I t I ... ... - SHrID 3 zo4RSFTM IIoA t 3 iTeRFTM :_�` t � 1 BIKE STORAGE (6) .g 1 13 OaRBFTM I / -- e- I r r `STALE _ . OPEN SPACE D _ v L7' CO MON HOUSE 2 34030 SF o IF FrvT svAeF • �� IAA 1 / t F-r / z � < ( 9TA1!) �eI - _ • //l r�-.'i rl l / J yT h r{ Rqr PS- W-12 -- STORY lH r/ • - / II � •/ `` t3� � AG ESMT PUBLIC / I 3 srORy i s DRAINAGE v (� 1, 10' t oN i68R5FTM ESMT (TYP.) a- O 1\{L �ry5 D. 3 BTQRY 1H PRIVATE STREET ESMT (TYP.) • " / F \ � 3 To4R51=TH t Oi _ � G / gRpORN LOT BOUNDARY (TYP.)-.� Q�� 0- p \PR6RAIL ass sF - FOREST IT \ t \ \ T N i R (6) - /• / / Eh _ =5' "PACE AREYc2. _ _ C _ / }•zl3- `jtEENN$- 94fi ACRES HSC,-A RKIN / ySG� RE - - - _ _ • 5' SIDEW LK' 7YP.)•• 8 8 - 5' // / 1Q .-. SPACES_ - — - s. _ QEEN If ACf-_B ROAD A 20• PRIVATE 427T6 SF _ o �9s\ BEGIN _ Z WIDENING - - — PRESERVED SLOPES RIPW - - G FOREST/OPEN - - — - — — - - _ v'1SACE AREA 2. - — — — - - - — - — \\ F(/UE}& SPACE h' - - - - Z� E ---------- - - - - - _ -------------SIGN- n STATE ROUTE 631 vo oP G qRQ R RIO ROAD EAST 14 G J, � U o i o q q A m PRESERVED SLOPES SURVEYED c 259 M. SHIMP > ic. N/©.. 4J5163 2 $4 10MULTIUSE PEDESTRIAN TRAIL TRABSITIONS TO 14' FIRE ACCESS ROAD & MULTIUSE PEDESTRIAN TRAIL W. 5' SIDEWALK. a h y oEE y o 0 ZL OEWA(K -- } SFTHO 1 FOR€ST/ORJJ i _SPACE AREA.3 0 n OPEN SFA — 2=59 ". T68 - SIGN STAT 1� Q - RIO Z w� O Vo w U Lu L J � a g a W Nm >wQ Date 09 23 2019 Scale 1" = 30, Sheet No. 0 30 60 90 C3 OF 19 91e: t"=30' File No. 16.009 SHED r SH" I I I I I I I I I I I I I o s i, 4. JAP 9165 kziV m Z O 0 M U I U Z V $w w a � O �w � wu oG y z C7 � o N F J i7 T w r w o w t( Q \ y _ I R ' / \� NEW CONCRETE PET- r.` 0 U WALL 5' MAX HEIGHT m W. 42" HANDRAIL. NOTE. SLOPES >_ 2. 1 r �i SHALL RE STABILIZED WITH LOW MAINTENACE o a ` I � GROUND COVER. REFER Unu M.SHIW ic. No.. 45163 96 �' `\ \ w — W T W W A 4 v v� _ TO [DETAIL 11 SHEET C12. �(�lao � -- t t 12 , v 1 ;l 1 ��� `q----- ---'__ _ WSW �W PRESERVED SLOPES \ r 4oG PTO BE DISTURBED �/',. /�r.�;W` \ EW S GM NTAL fififi / BLO LLS.\},, 5' M X EIGH I I I \ 1 18 — . I I / I /� / I I / I 1 y ��.� t 4�yb. I 4 "^ / I °a ��\'I ` to w RAIL I I ro i• / \ � \ r . 1 \ _ - e_ ALL. 470 _ / l -i _----- - _ � ''✓ia ) / p p t / -- i / r / m // aFE zas _ % f `�/pFse // �l % iir; / // �/ 1 I•._ __ 1 a6D ���--------------- I _ r o b ✓ -: sF p3zs , l _� � y. ii / � / I I' I Ij N \ y¢ �--—_—__—_ — ---- — -- --- N I II / / 1 ✓ B) S T.... d/// a74 / / I II / \ •` <� t'Tf ass. / °b.�60 �� K��— __--_ __ __ —_ BPI 4494 44 �� S7AT �1 / @s / // / I o ..}},,((o' � \ \ I I� e E 4}io J � ./3'� �; -/1" _ �- / / / l _• I 1/^� a�� ' %� J - i \, \ RIO wow I`9/ \ � 1�d 1 I I I I � 11 v I I L__ -CJ / / _ . /.'. •k .. / / — m� V A NAA�,��>I 47o A A V P uL v v V F 44s1e LL v _ �O _e \ —_ �3 $ETSYw.1`� _— PRESERVED SLOPES \\ / 4 Y�c/( \_4�0 \---y___----` —430_ _----- ------------ ---- —� -- _ — — — — _i j ��� / I Z IL N - -- M a/o c11� WNl>F<INF Otia // / - / STATE/ROUTE RIO OAD EAST W Q m PRESERVED SLOPES — SURVEYED < 25% Date 09 23 2019 scale 1" = 30' 30 0 30 60 90 Sheet No. C4 OF 19 Scale: t"=30' File No. 16.009 c / OPEN SPACE A 3 Q / NEW ROW l N \\ 6C 1111 a _ POWER Asa POLE Q 5., h i PP inl n Aae PUBLIC ;E ESMT 1 ENT ll ENT % 730 CONC. 60WALL TOP-387,80 INV=385.29 \ \ \ r SEE SHEET Cl e, \ OP N s E� 4�7�16 NEW ROW \ BMP EADS BAYFILTER W. \\\ \ STORMTECH CHAMBERS TOTAL AREA TREATED: 3.39 AC (INCLUDES 0.78 AC DIRECT + 2.61 AC FROM BMPS A, B, & C) AMP DROP INLET JTOP-398.3 INVNV=390 Y I EXISTING PERMA DRAINAGE EASE 1788 P. 730 � I\I IN I I I I I I I I 1 I I I II I I NEW PU IC SM I FACILIN' ESMT I I I I I I / � I na I NEW 20' DOMINION POWER ESMT Sam BEGIN BRANCH 1: 18%8" TS&V TO EX. RWSA WATERLINE II71 _-.-.... ...... ..-......_.... .. ..._..A 5i �.n��'�i:r �I III II I �I-11 II II II II I . I- I Anil In_�I�nulrnnuu . -8"STEEL SIDEWAD( ROOF DOWNSPOUT DETAIL (--2 TYP. RAIN GARDEN DETAIL _� FLUME C5 NOT TO SCALE �5 NOT TO .SCALE T w ]LE IE UNDERGROUND rvD ELECTRIC CONDUIT F r NOTE: ALL RAINGARDENS ARE LEVEL 1 BMPS. W m 0 NEW 10'PUBUC LOTS IA-8A SHALL HAVE RAIN DRAINAGE ESMT \� GARDENS WITH A 66 SF FOOTPRINT. LOTS 9A-17A SHALL HAVE RAIN \ GARDENS WITH A 80 SF FOOTPRINT. T ps \ SEE SHEET C6 FOR REMAINING LOTS' . R, FX DETAILS. o \ R�, �z RWSA WATER EASEMENT SRW-ARV-16 U IU M. 5163 ic. No.. 45183 \w �C v'T� r 3- NEW 20' DOMINION I(ajlao w4 0i1 w _W �� �w POWER ESMT �W 'A W W °d d, _N, X W �w E RWSA SA w18" WL w _W _w 6A�uc W `o EUA E /jJ\V OF 1-4 1B NEW PUBLIC SWM Oa 2B t' FACILITY ESMTTEE 28 ncE ESMr � _ NEW 10' PUBLIC / DRAINAGE ESMT ND wEND �� 11 I 1 (1 IA j 13' �- _w mow_ / Z 11 0 11 I NE 20' PUBU e• • N -1 _Y I m 1 1 I WAGE ESMT END e AN }. O 10' NATIVE GRASS a,a TEE I FILTER STRIP 1 1 r il�`•' �� i I OPEN SPACE D • sa NE;PUBLICPUBLIC 1. 34030 SF � O FAIU"DTY ESMT omI �c r 48' CONC. RISER / ° V 0 C�I� : 700 SF LEVEL 2 I I I r Z BIOFILTRATION BASIN. TREATED EA: 0.76 AC I9C. 3 /.. 1 I BRANCH 2: GV BEND. r\ M Lu 7 _} I � I --FHA 10' NATIVE GRASS ...:�� ' — \\ °& > FILTER STRIP W s Date 1. 1 DRAINAGE ESMT 09 23 2O1 9 __ I .'.•W ��'•' 1" = 30, 90• -15 1 i - Sheet No. EN. i __� y ,1C 20 0 20 40 6. r C5 OF 19 EW PUBuc Sw1d Scale: 1 "=20' File N, F CIDTY ESMT 16.009 RWSA WATER EASEMENT SRW-ARV-16 — wow—w—w—W—W— w —w BMP A (23) 75 SF ROOF DOWNSPOUT DETAIL uu _ E—uce�u�—ucE —W —w EX 181, RW� W A LEVEL 1 RAIN GARDENS C6 NOT TO SCALE w S IN PERIMETER LOTS o ucE °GE�ucE�u w w —w TREATED AREA: 0.84 AS -w NEW 20' DOMINION w w POWER ESMT uP, — w \ w ucE w BEGIN BRANCH 2: 18'x8. TO E%. ftWSA W"ATERLINE NEW PUBLIC SWM oa 2B 3B 4B o� / ucE — W FACILITY ESMT �\ xl / `/) oa/ \ ucE F —W —WA WL O / oa 66 / w —w L w � A—g i A-10 NEW to' Puauc / oa/ V B SB / W A-11 A-12 DRAINAGE ESMT q—t ti BE ND N BE -_ A-14 / / � 10' NATIVE GRASS) r 7a - FILTER STRIP OPEN SPACE D / ,. 86 ` ✓� / NEµ' C SWM 34030 SF PUBDESMT / _ A-21 ` j FA ICALItt ' I /%/ . ,. ,. % /48" CONC. RISER QJU D A BMP C: 75U SF LEVEL 2 BIOFILTRATION BASIN. TREATED 0.76 AC _ I I / / �.T2EA: e..xn_b.. W ��EV `J n : - - ND BRANCH 2: Gv BEND 10' NATIVE GRASS 1 ob FILTER STRIP •A.� ob' iC GI 20.37 OPEN SPACE B ♦ 42716 SF I -I SY •'l�l 1pn 011n l rail non L � ��IIIIL�IL� I- nl -�I ¢- Anil �i Il-n�u- 7 In_'�I�S'nulrnnuu . (--2-'Y1YP. RAIN GARDEN DETAIL C6 NOT TO .SCALE NOTE: ALL RAINGARDENS ARE LEVEL 1 BMPS. LOTS 1B-15B SHALL HAVE RAIN GARDENS WITH A 67 SF FOOTPRINT. 17� Q" a� 1 V M. SHIMP > No.. 45183 � (aj 12, E A -la I uc 1 — { i E E FH _ o a q- g OPEN SPACE E \ \ N n6 25359 SF }1 I \ nl N PDBMC So FACILITY ESMT 1 I \ -20 ON :y SIGN IGN \ / \ ur D LET sl =444.77 \ n NV. 434.29 20 0 20 40 60 Scale: T"=20' � w�M LL O V0 w U O � Lu LL � J a g IL W Nm >wQ Date 09 23/2019 sale 1" = 30' Sheet No. C6 OF 19 File No, 16.009 PROJECT DESCRIPTION, GENERAL NOTES, EROSION & SEDIMENT CONTROL NOTES, AND SEQUENCE OF CONSTRUCTION PROJECT DESCRIPTION THIS SITE IS A DEVELOPED BUT MOSTLY WOODED LOT OFF RIO RD EAST IN ALBEMARI F COUNTY BEING DEVELOPED INTO A MULTI -UNIT COMMUNITY. THE TOTAL AREA OF DISTURBANCE IS 5.90 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 DETAILS. 3. GRADING AND PLACEMENT OF FILL SHALL BE IN GENERAL ACCORDANCE WITH THE PLAN 4. ESTABLISHMENT OF PERMANENT STABILIZATION OF ALL DISTURBED AREAS. �ImIJNysi/]3�T9�GOtc1 THIS PROPERTY IS BORDERED ON THE EAST AND SOUTH BY RIO ROAD EAST. THE PROPERTY IS BORDERED ON THE WEST AND NORTH BY DEVELOPED, PARTIALLY WOODED LOTS. OFFSITE AREAS: SOIL MAY NEED TO BE EXPORTED AND STOCKPILED OFFSITE. IF OFFGTE WASTE AREAS ARE USED, THESE SHALL HAVE EROSION CONTROL PERMITS. THESE WILL BE NOTED ON THE REGISTRATION STATEMENT BEFORE THE PRECONSTRUCTION MEETING AND ISSUANCE OF THE LAND DISTURBANCE PERMIT. SOILS THE SITE CONTAINS THE FOLLOWING SOIL TYPES: 21B - CULPEPPER SANDY LOAM - 2 TO 7% SLOPES, HSG B 47D - LOUISBURG SANDY LOAM - 15 TO 25% SLOPES, HSG A CRITICAL AREAS THE CRITICAL AREA ON THE SITE IS RIO ROAD EAST. THE CONTRACTOR SHALL ENSURE NO SILT ENTERS THE ROADWAY. EROSION & SEDIMENT CONTROLS 1, SAFETY FENCE: A PROTECTIVE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL MEASURE. STD. AND SPEC. 3.01. 2. CONSTRUCTION ENTRANCE: INSTALL AND MAINTAIN A CONSTRUCTION ENTRANCE, AS NECESSARY, THAT MEETS THE REQUIREMENTS OF STD. AND SPEC, 3.02 AND CONFORMS WITH THE REQUIREMENTS OF THE EROSION & SEDIMENT CONTROL PLAN, 3. 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. 4. TEMPORARY SEDIMENT TRAP: A SMALL HORSING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS FOR ENOUGH TIME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM EFFECTIVE LIFE IS 18 MONTHS STD. AND SPEC. 3.13. TO BE CONVERTED INTO A PERMANENT DETENTION POND AT THE END OF CONSTRUCTION AS DETAILED. 5. TEMPORARY DIVERSION DIKE: A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA WHICH DIVERTS SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE, MAXIMUM EFFECTIVE LIFE IS 18 MONTHS. STD. AND SPEC. 3.09, THE CLEARWATER DIVERSIONS WILL BE MADE STABLE BY THE USE OF SPOT LD-268 DESIGN STANDARDS. 6. 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 30 DAYS. TEMPORARY SEEDING SHALL BE APPLIED IN CONFORMANCE WITH STD. AND SPEC. 3.31. 7. 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. 8. 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. 9. DUST CONTROL CONDUCT DUST CONTROL OPERATIONS NECESSARY TO MET THE REQUIREMENTS OF STD. & SPEC, 3.39 AS REQUIRED TO CONTROL SURFACE AND AIRBORNE MOVEMENT OF DUST. 10.INLET PROTECTION. 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. 11. OUTLET PROTECTION: RIP -RAP SHALL BE PROVIDED AT THE OUTFALL OF CONVEYANCE CHANNELS, CULVERTS, AND STORM SEWERS IN CONFORMANCE WITH STD. AND SPEC. 3.18. OUTLET PROTECTION SHALL BE INSTALLED WITH ACCOMPANYING STORM SEWERS AND SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRED IF NECESSARY. ANT SEDIMENT BUILD UP SHALL BE REMOVED. PERMANENT STABILIZATION AND SEQUENCE OF CONSTRUCTION THE FOLLOWING ARE THE PROPOSED MANAGEMENT STRATEGIES AND DETAILED SEQUENCE OF CONSTRUCTION: STAGE 1 1. INSTALL CONSTRUCTION ENTRANCES OFF RIO ROAD AS SHOWN ON C8-INSTALL SILT FENCE SHOWN. 2. INSTALL STORM SEWER "SECTION A". REFER TO C14 FOR OFFSITE STORM. 3. WHEN "SECTION A" STORM HAS BEEN INSTALLED AS SHOWN, CONTACT ENGINEER AND ALBEMARLE COUNTY TO INSPECT_ AFTER THIS AREA IS STABILIZED, REMOVE CONSTRUCTION ENTRANCE ON PARCEL AI A. 3. INSTALL DIVERSIONS, SILT FENCE, INLET PROTECTION, & SEDIMENT BASIN. 4. CONTACT DESIGN ENGINEER AND THEN COUNTY INSPECTOR FOR INSPECTIONS. 5. WHEN ALL PARTIES HAVE APPROVED FIELD CONDITIONS, BEGIN MASS GRADING, STARTING AS SHOWN ON SHEET OR. 6. MAINTAIN PERIMETER CONTROLS DURING TRANSITION INTO STAGE 2. STAGE 2 1. MOVE CONSTRUCTION ENTRANCE TO NEW LOCATION SHOWN ON SHEET C9 AFTER STAGE 1 AREA IS GRADED. 2-INSTALL ADDITIONAL PERIMETER CONTROLS AS SHOWN AS GRADING PROCEEDS. CONTACT DESIGN ENGINEER TO INSPECT AND CONFIRM PROPER INSTALLATION. 3. INSTALL UTILITIES AND GRADE ROAD AREAS. 4_ MASS GRADING SHOWN ON THIS SHEET REPRESENTS INTERMEDIATE GRADES AND CAN BE ADJUSTED IN THE FIELD. 5. MAINTAIN SEDIMENT BASIN UNTIL ALL UPSTREAM AREAS ARE STABILIZED. CONTACT BOTH DESIGN ENGINEER AND COUNTY INSPECTOR BEFORE BASIN IS REMOVED. STAGE 3 1. INSTALL SILT FENCE WHERE NEEDED FOR ANY FINAL PERIMETER GRADING (PRIMARILY FOR REMOVAL OF SEDIMENT BASIN AND DIVERSIONS ALONG THE PERIMETER) 2- AFTER SEDIMENT BASIN IS REMOVED, INSTALL STORMTECH BMP AND LOWER PARKING AREA. DO NOT INSTALL STORM CARTRIDGES UNTIL SITE HAS BEEN ENTIRELY STABILIZED AND SYSTEM HAS BEEN CLEANED OUT. 3. WHEN SITE HAS BEEN STABILIZED, HOUSE CONSTRUCTION MAY BEGIN. 4. DURING HOUSE CONSTRUCTION, AREAS THAT ARE NOT BEING DISTURBED MUST REMAIN STABILIZED. INSTALL SILT FENCE PROTECTION FOR LOTS UNDER CONSTRUCTION. 5. IMPORTANT. RAIN GARDENS SHALL BE INSTALLED LOT BY LOT. DO NOT INSTALL RAIN GARDENS UNTIL EACH RESPECTIVE HOUSE HAS BEEN CONSTRUCTED. THE RAIN GARDEN UNDERDRAINS SHALL BE CONNECTED TO THE STORM DRAINS WITH INSERTA-TEES AS THE FINAL STEP OF LOT CONSTRUCTION. CONTACT DESIGN ENGINEER FOR INSPECTIONS OF THE RAIN GARDENS. 6. DO NOT INSTALL BIOFILTERS UNTIL ALL UPSTREAM AREAS ARE PERMANENTLY STABILIZED. FINAL 1, MAINTAIN CONTROLS UNTIL SITE STABILIZATION AND COUNTY INSPECTOR HAS APPROVED CONTROL REMOVAL. 2. ANY SEDIMENT THAT ENTERS BMPS FROM CONSTRUCTION MUST BE CLEANED OUT BY CONTRACTOR. 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 WITH 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 REGULATORS 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 I. THE INFORMATION AND DATA SHOWN OR INDICATED WITH 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 FACILIFES 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 UTILITIES, FOR COORDINATION OF THE WORK WITH OWNERS OF SUCH UNDERGROUND UTILITIES DURING CONSTRUCTION, FOR THE SAFETY AND PROTECTION THEREOF AND REPAIRING ANY DAMAGE THERETO RESULTING 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 CONTRACTORS SOLE RESPONSIBILITY TO REPAIR OR REPLACE. THIS EXPENSE IS THE CONTRACTOR'S RESPONSIBILITY. 3. REPLACEMENT OR REPAIR IOF DAMAGED STRUCTURES SHALL BE AT THE CONTRACTOR'S EXPENSE. 4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROTECTING ALL EXISTING 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 CONSTRUCflON INDUSTRY (29 CUR PART 1926). 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 ANO LABORATORY REPORTS. THE OWNER'S APPROVAL OF SUBMITTALS WILL BE GENERAL AND WILL NOT RELIEVE 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 NOTES: 1, ALL CONCETNRATED ONSITE RUNOFF SHALL BE ROUTED INTO MEADOW CREEK. SINCE THE SITE IS LESS THAN 1% OF THE TOTAL DRAINAGE AREA TO THE POINT OF DISCHARGE IN MEADOW CREEK, NO CHANNEL ANALYSIS FOR EROSION OR FLOOD PROTECTION IS REQUIRED. 2. ON SITE RUNOFF SHALL BE CONVEYED USING STORM DRAINS. 3. WATER QUALITY WILL BE ADDRESSED BY THE USE OF BIOFILTRATION BASINS, RAIN GARDENS, AND A MANUFACTURED TREATMENT DEVICE. THESE WILL MEET THE VRRM REDEVELOPMENT NUTRIENT REMOVAL REQUIREMENTS PER 9VAC25-870-65. 4- BMP COORDINATES: • BMP A: RAIN GARDENS, VARIES. • BMP B: RAIN GARDENS, VARIES. • BMP C: 38.049256,-78.464854 • BMP D: 38.048940,-78.465583 • BMP E 38,048640, -78.46545E 5. BMP A ARE LEVEL 1 VRRM-COMPLIANT RAIN GARDENS FOR HOUSES ALONG THE PERIMETER OF THE DEVELOPMENT THIS CONSISTS OF 23 RAIN GARDENS, WHICH TOGETHER MAKE UP BMP A. BMP A WILL TREAT A TOTAL OF 0.114 ACRES, WHICH INCLUDES 0.48 ACRES IMPERVIOUS. THE DESIGN TREATMENT VOLUME IS 1893 CF. INDIVIDUAL GARDEN TV IS 83 CF. INDIVIDUAL FOOTPRINT IS 66 SF OF MEDIA AREA. ALL "A" RAIN GARDENS INCLUDE 18" OF FILTER MEDIA ABOVE 12"' OF STONE. EACH HAS A 6" PERFORATED PVC UNDERDRAIN. 6. BMP B ARE LEVEL 1 VRRM-COMPLIANT RAIN GARDENS FOR THE INTERIOR HOUSES OF THE DEVELOPMENT. THIS CONSISTS OF 15 RAIN GARDENS, WHICH TOGETHER MAKE UP BMP B. BMP B WILL TREAT A TOTAL OF 0.76 ACRES, WHICH INCLUDES 0.37 ACRES IMPERVIOUS. THE DESIGN TREATMENT VOLUME IS 1508 CF_ INDIVIDUAL GARDEN TV IS 107 CF. INDIVIDUAL FOOTPRINT IS 80 SE OF MEDIA AREA. ALL "B" RAIN GARDENS INCLUDE 18" OF FILTER MEDIA ABOVE 12" OF STONE- EACH HAS A 6" PERFORATED PVC UNDERDRAIN. 7. BMP C & D ARE LEVEL 2 VRRM-COMPLIANT BIOFILTRATION BASINS. BMP C TREATS A TOTAL OF 0.76 ACRES, WHICH INCLUDES 0.21 ACRES IMPERVIOUS. BMP C HAS A TREATMENT VOLUME OF 1105 CF, BMP D TREATS A TOTAL OF 0.25 ACRES, WHICH INCLUDES 0.03 ACRES IMPERVIOUS. BMP D HAS A TREATMENT VOLUME OF 231 CF. BOTH BIOFILTRATION BASINS INCLUDE 24" FILTER MEDIA. BMP C HAS 18" #57 STONE STORAGE. BMP C HAS 12'" #57 STONE STORAGE. BOTH BMPS HAVE A 6" PERFORATED UNDERDRAIN. BOTH BMPS HAVE GRAVEL FLOW SPREADERS AND GRASS FILTER STRIPS AS PRETREATMENT OPTIONS. 8. BMP E IS A MANUFACTURED TREATMENT DEVICE. THIS INCLUDES STORMTECH CHAMBERS WITH AN ISOLATOR ROW AND A BAYFILTER TREATMENT. THIS BMP PROVIDES 70% TO REMOVAL. TREATMENT VOLUME IS 6,924 CF, 9, 1.06 ACRES OF SWM FOREST/OPEN SPACE SHALL BE PRESERVED AND DEDICATED IN AN EASEMENT WITH THE SUBDIVISION PLAT. THE SWM FOREST AND OPEN SPACE EASEMENT IS SUBJECT TO THE GUIDANCE SET FORTH BY THE DEC IN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM. THE AREAS WILL REMAIN IN A NATURAL VEGETATIVE STATE, EXCEPT FOR ACTIVITIES AS APPROVED BY THE LOCAL PROGRAM AUTHORITY, SUCH AS FOREST MANAGEMENT, CONTROL OF INVASIVE SPECIES, REPLANTING AND RE VEGETATING, PASSIVE RECREATION (E.G. TRAILS), AND LIMITED BUSH HOGGING TO MAINTAIN DESIRED VEGETATIVE COMMUNITY (BUT NO MORE THAN 4 TIMES A YEAR). THIS AREA WILL REMAIN UNDISTURBED OR RESTORED TO A HYDROLOGICALLY FUNCTIONAL STATE- FOR THIS DEVELOPMENT, THE AREA IS WITHIN THE SUBDIVISION'S OPEN SPACE LOT THIS 1.06 ACRE AREA IS SHOWN ON ON 1, THIS AREA IS OUTSIDE THE LIMITS OF DISTURBANCE AND SHALL BE DEMARCATED IN THE FIELD PRIOR TO COMMENCEMENT OF CONSTRUCTION. BIOFILTER INSTALLATION NOTES 1. CONSTRUCTION OF THE BIORETENTION AREA MAY ONLY BEGIN AFTER THE ENTIRE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED WITH VEGETATION. IT MAY BE NECESSARY TO BLOCK CERTAIN CURB OR OTHER INLETS WHILE THE BIORETENTION AREA IS BEING CONSTRUCTED. THE PROPOSED SITE SHOULD BE CHECKED FOR EXISTING UTILITIES PRIOR TO ANY EXCAVATION. 2. THE DESIGNER AND THE INSTALLER SHOULD HAVE A PRECONSTRUCTION MEETING, CHECKING THE BOUNDARIES OF THE CONTRIBUTING DRAINAGE AREA AND THE ACTUAL INLET ELEVATIONS TO ENSURE THEY CONFORM TO ORIGINAL DESIGN. SINCE OTHER CONTRACTORS MAY BE RESPONSIBLE FOR CONSTRUCTING PORTIONS OF THE SITE, IT IS QUITE COMMON TO FIND SUBTLE DIFFERENCES IN SITE GRADING, DRAINAGE AND PAVING ELEVATIONS THAT CAN PRODUCE HYDRAULICALLY IMPORTANT DIFFERENCES FOR THE PROPOSED BIORETENTION AREA. THE DESIGNER SHOULD CLEARLY COMMUNICATE, IN WRITING, ANY PROJECT CHANGES DETERMINED DURING THE PRECONSTRUCTION MEETING TO THE INSTALLER AND THE PLAN REVIEW/INSPECTION AUTHORITY- 3. TEMPORARY FOS CONTROLS ARE NEEDED DURING CONSTRUCTION OF THE IO BRETENTI ON AREA TO DIVERT STORMWATER AWAY FROM THE BIORETENTION AREA UNTIL IT IS COMPLETED. SPECIAL PROTECTION MEASURES SUCH AS EROSION CONTROL FABRICS MAY BE NEEDED TO PROTECT VULNERABLE SIDE SLOPES FROM EROSION DURING THE CONSTRUCTION PROCESS. 4. ANY PRE-TREATMENT CELLS SHOULD BE EXCAVATED FIRST AND THEN SEALED TO TRAP SEDIMENTS. 5. EXCAVATORS OR BACKHOES SHOULD WORK FROM THE SIDES TO EXCAVATE THE BIORETENTION AREA TO ITS APPROPRIATE DESIGN DEPTH AND DIMENSIONS. EXCAVATING EQUIPMENT SHOULD HAVE SCOOPS WITH ADEQUATE REACH SO THEY DO NOT HAVE TO SIT INSIDE THE FOOTPRINT OF THE BIORETENTION AREA. CONTRACTORS SHOULD USE A CELL CONSTRUCTION APPROACH IN LARGER BIORETENTION BASINS, WHEREBY THE BASIN IS SPLIT INTO 500 TO 1,000 SQ. FT. TEMPORARY CELLS WITH A 10-15 FOOT EARTH BRIDGE IN BETWEEN, SO THAT CELLS CAN BE EXCAVATED FROM THE SIDE. 6. IT MAY BE NECESSARY TO RIP THE BOTTOM SOILS TO A DEPTH OF 6 TO 12 INCHES TO PROMOTE GREATER INFILTRATION. 7. PLACE GEOTEXTILE FABRIC ON THE SIDES OF THE BIORETENTION AREA WITH A 6-INCH OVERLAP ON THE SIDES. IF A STONE STORAGE LAYER WILL BE USED, PLACE THE APPROPRIATE DEPTH OF #57 STONE ON THE BOTTOM, ILL LL THE PERFORATED UNDERDRAIN PIPE, PACK #57 STONE TO 3 INCHES ABOVE THE UNDERDRAIN PIPE, AND ADD APPROXIMATELY 3 INCHES OF CHOKER STONE/PEA GRAVEL AS A FILTER BETWEEN THE UNDERDRAIN AND THE SOIL MEDIA LAYER. IF NO STONE STORAGE LAYER IS USED, START WITH 6 INCHES OF #57 STONE ON THE BOTTOM, AND PROCEED WITH THE LAYERING AS DESCRIBED ABOVE. 8. OBTAIN SOIL THE MEDIA FROM A QUALIFIED VENDOR, AND STORE IT ON AN ADJACENT IMPERVIOUS AREA OR PLASTIC SHEETING. AFTER VERIFYING THAT THE MEDIA MEETS THE SPECIFICATIONS, APPLY THE MEDIA IN 12-INCH LIFTS UNTIL THE DESIRED TOP ELEVATION OF THE BIORETENTION AREA IS ACHIEVED. WAIT A FEW DAYS TO CHECK FOR SETTLEMENT, AND ADD ADDITIONAL MEDIA, AS NEEDED, TO ACHIEVE THE DESIGN ELEVATION. 9. PREPARE PLANTING HOLES FOR ANY TREES AND SHRUBS, INSTALL THE VEGETATION, AND WATER ACCORDINGLY_ INSTALL ANY TEMPORARY IRRIGATION_ 10. PLACE THE SURFACE COVER IN BOTH CELLS (MULCH, RIVER STONE OR TURF), DEPENDING ON THE DESIGN. IF GOOD OR JUTE MATTING WILL BE USED IN LIEU OF MULCH, THE MATTING WILL NEED TO BE INSTALLED PRIOR TO PLANTING (STEP 9), AND HOLES OR SLITS WILL HAVE TO BE CUT IN THE MATTING TO INSTALL THE PLANTS. 11_ INSTALL THE PLANT MATERIALS AS SHOWN IN THE LANDSCAPING PLAN, AND WATER THEM DURING WEEKS OF NO RAIN FOR THE FIRST TWO MONTIHS. 12. REFER TO C19 FOR ADDITIONAL DETAILS. BAYFLITER BMP INSTALLATION NOTES THE FOLLOWING INSTALLATION PRACTICES SHALL BE FOLLOWED AT THE SITE. 1. FOLLOW ALL MANUFACTURER GUIDELINES SPECIFIED ON SHEET 016 AND C17. 2. EXCAVATE THE BAYFILTER PRACTICE TO THE DESIGN DIMENSIONS FROM THE SIDE, USING A BACKHOE OR EXCAVATOR. THE FLOOR OF THE PIT SHOULD BE COMPLETELY LEVEL, EQUIPMENT SHALL BE KEPT OFF THE FLOOR AREA TO PREVENT SOIL COMPACTION. 3. CORRECTLY INSTALL FILTER FABRIC ON THE TRENCH SIDES. LARGE TREE ROOTS SHOULD BE TRIMMED FLUSH WITH THE SIDES OF INFILTRATION TRENCHES TO PREVENT PUNCTURING OR TEARING OF THE FILTER FABRIC DURING SUBSEQUENT INSTALLATION PROCEDURES. WHEN LAYING OUT THE GEOTEXTILE, THE WIDTH SHOULD INCLUDE SUFFICIENT MATERIAL TO COMPENSATE FOR PERIMETER IRREGULARITIES IN THE TRENCH AND FOR A 6-INCH MINIMUM QVERLAP AT THE TOP OF THE TRENCH. THE FILTER FABRIC ITSELF SHOULD BE TUCKED UNDER THE SAND LAYER ON THE BOTTOM OF THE TRENCH. STONES OR OTHER ANCHORING OBJECTS SHOULD BE PLACED ON THE FABRIC AT THE TRENCH SIDES, TO KEEP THE TRENCH OPEN DURING WINDY PERIODS. VOIDS MAY OCCUR BETWEEN THE FABRIC AND THE EXCAVATED SIDES OF A TRENCH. NATURAL SOILS SHOULD BE PLACED IN ALL VOIDS, TO ENSURE THE FABRIC CONFORMS SMOOTHLY TO THE SIDES OF EXCAVATION. 4. SCARIFY THE BOTTOM OF THE BAYFILTER BMP, AND INSTALL FILTER STONE PER SPECS. 5. PLACE STORAGE CHAMBERS AT SPECIFIED INVERT. CHAMBERS MUST BE FLAT WITH A 0% OPF- BIOFILTER INSTALLATION CHECKLIST ❑ CONTRIBUTING DRAINAGE AREAS HAVE BEEN ADEQUATELY STABILIZED WITH A THICK LAYER OF VEGETATION AND EROSION CONTROL MEASURES HAVE BEEN REMOVED. ❑ VERIFY THE PROPER COVERAGE AND DEPTH OF MULCH, VEGETATION, OR SOIL MATTING HAS BEEN ACHIEVED FOLLOWING CONSTRUCTION, BOTH ON THE FILTER BED AND THE SIDE -SLOPES. ❑ INSPECT THE PRE-TREATMENT FORBAYS AND FILTER STRIPS TO VERIFY THAT THEY ARE PROPERLY INSTALLED, STABILIZED, AND WORKING EFFECTIVELY BEFORE OPENING THE FACILITY TO RUNOFF. ❑ CHECK THAT OUTFALL PROTECTION/ENERGY DISSIPATION MEASURES AT CONCENTRATED INFLOW AND OUTFLOW POINTS ARE STABLE. ❑ FOLLOW-UP INSPECTION AND AS -BUILT SURVEY/CERTIFICATION HAS BEEN SCHEDULED. ❑ CPS COORDINATES HAVE BEEN DOCUMENTED FOR ALL BIOFILTRATION & RAIN GARDEN PRACTICES ON THE PARCEL. BAYFILTER INSTALLATION CHECKLIST ❑ PRE -CONSTRUCTION MEETING WITH THE CONTRACTOR DESIGNATED TO INSTALL THE BMP HAS BEEN CONDUCTED. ❑ IMPERVIOUS COVER HAS BEEN CONSTRUCTED/INSTALLED AND AREA IS FREE OF CONSTRUCTION EQUIPMENT, VEHICLES, MATERIAL STORAGE), ETC. ❑ ALL PERVIOUS AREAS OF THE CONTRIBUTING DRAINAGE AREAS HAVE BEEN ADEQUATELY STABILIZED WITH VEGETATION. ❑ STORMWATER HAS BEEN DIVERTED AROUND THE AREA OF THE INFILTRATION PRACTICE AND PERIMETER EROSION CONTROL MEASURES TO PROTECT THE FACILITY DURING CONSTRUCTION HAVE BEEN INSTALLED. IS WHEN ALL THIS HAS BEEN ACHIEVED, FOLLOW INSTALLATION GUIDELINE ON SHEET CIS. Elf PONT DESIGN ENGINEER WHEN PROPER GRADES AND THE REQUIRED GEOMETRY FOR BMP INSTALLATION ARE ACHIEVED. ISCERTIFICATION OF EXCAVATION INSPECTION: INSPECTOR SHALL CERTIFY THE SUCCESSFUL COMPLETION OF THE EXCAVATION STEPS LISTED ABOVE BEFORE INSTALLATION CONTINUES. ❑ FOLLOW-UP INSPECTION AND AS -BUILT SURVEY/CERTIFICATION HAS BEEN SCHEDULED. C AS -BUILT UPS COORDINATES HAVE BFFN DOCUMEN70 FOR RMP_ FIRST -YEAR BMP MAINTENANCE SUCCESSFUL ESTABLISHMENT OF BMPS REQUIRES THAT THE FOLLOWING TASKS BE UNDERTAKEN IN THE FIRST YEAR FOLLOWING INSTALLATION: ❑ INITIAL INSPECTIONS. FOR THE FIRST 6 MONTHS FOLLOWING CONSTRUCTION, THE SITE SHOULD BE INSPECTED AT LEAST TWICE AFTER STORM EVENTS THAT EXCEED 1/2 INCH OF RAINFALL. ❑ SPOT RESEEDING. INSPECTORS SHOULD LOOK FOR BARE OR ERODING AREAS IN THE CONTRIBUTING DRAINAGE AREA OR AROUND THE BIORETENTI ON AREA, AND MAKE SURE THEY ARE IMMEDIATELY STABILIZED WITH GRASS COVER. ❑ FERTILIZATION. ONE-TIME, SPOT FERTILIZATION MAY BE NEEDED FOR INITIAL PLANTINGS. ❑ WATERING. WATERING IS NEEDED ONCE A WEEK DURING THE FIRST 2 MONTHS, AND THEN AS NEEDED DURING FIRST GROWING SEASON (APRIL-OCTOBER), DEPENDING ON RAINFALL. ❑ REMOVE AND REPLACE DEAD PLANTS. SINCE UP TO 10% OF THE PLANT STOCK MAY DIE OFF IN THE FIRST YEAR, CONSTRUCTION CONTRACTS SHOULD INCLUDE A CARE AND REPLACEMENT WARRANTY TO ENSURE THAT VEGETATION IS PROPERLY ESTABLISHED AND SURVIVES DURING THE FIRST GROWING SEASON FOLLOWING CONSTRUCTION. THE TYPICAL THRESHOLDS BELOW WHICH REPLACEMENT IS REQUIRED ARE 85% SURVIVAL OF PLANT MATERIAL AND 1007 SURVIVAL OF TREES. 0 FOR THE BAYFILTER SYSTEM, REFER TO BAYFILTER MAINTENANCE ON C16 & CIE. MINIMUM STANDARDS HyS1: All applicable Vlrginio 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. STABLIZATION OF DENUDED AREAS: Permanent or temporarysoil stabilition shall be applied to bare a e withln s n days after fiza nal grade is reached on any portion of the site, Temporary ,if stabilization shall be applied with n save, n days to denuded s that may not be at final grn ade, but will r dormant o undisturbed for longer than 30 days- Permanent st a b llization shall be applied at areas that era to be left dormant far more than 1 year. 2.STABILIZATION OF SOIL STOCKPILES. During c nstruction of the project, soil stockpiles shall be stabilized o protected with sediment trapping maThe applicant is responsible for temporary protection and permanent stabillza tlon of all soil stockpiles on site as well as soil intentionally transported from the project site. 3.PERMANENT VEGETATIVE COVER A permanent vegetative cover shall be established on denuded are,, not otherwise permanently stabilized.rmnt sh ed. Per vegetation all not be cars l dered established until a ground c achieve that, in the opinion of the county Inspector, is uniform and mature enough to survive to inhibit 4.TIMING & STABILIZATION OF SILT TRAPPING MEASURES: Sediment basins and traps, perimeter dikes, sediment barriers and other s intended to trap sediment shall be c nstructed a a first step in any l anddisturbing activity and shall be made fun ctlon of before upsl ape land disturbance takes place. 5.STABILIZATION OF EARTHEN STRUCTURES: Stabilization m shell be oppl led to earthen structures such as dams, dikes and diversions immediately after installation. &SEDIMENT TRAPS AND BASINS: A sediment basin shall control surface runoff from disturbed cress that Is -prised of flow from drainage or... greater than o equal to three acres The sediment basin shell be designed and c nslru clear to a modata the anticipated sediment loading for the land disoturbing activity. The curtail device or system device shall take iota a unt 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 desiga ned and c nstructed in manner that will m zStones that are found to be eroding e svely rosion. within o eyear of permanent stobllzat, on shall be provided with additional slope stabilizing measures until the problem Is corrected. & CONCENTRATED RUN-OFF DOWN CUT OR FILL SLOPES: Concentrated runoff shall not flow down cut or fill slopes unless contained within an dequate 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. 10.STORM SEWER INLET PROTECTION: All storm se inlets that a made operable during construction shall be protected sothat sedimentrlade, water cannot to renot enter the co veyonce system wl thout first being filtered or other, Ise move sediment. ll.STABILIZATION OF OUTLETS: Before newly c nstructed stormwater c veyonce channels a made operational, adequate outlet protection and any required temporary or permanent channel lining shall be installed in both the conveyance channel and recelving channel. 12.WORK IN LIVE WATERCOURSES: When work In a live watercourse is performed, precautions shall be taken to m achment, control sediment transport and stabilize the work a tomU greatest extent possible during c nstruction. Nonerodible material shall be used for the c nstruction of causeways and cofferdams Earthen fill may be used for these structures if ormored by nonerodible cover materials. 13. over A LIVE WATERCOURSE: When a live watercourse must be crossed by construction vehicles more than twice in any s month period, atemporary streom crossing constructed of nonerodible 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. 15. STABILIZATION OF 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 In addition to other criteria: a.No more than 500 linear feet of trench may be opened at one time, b.Excovated material shall be placed on the uphill side of trenches ,.Effluent for dewatering operations shall be filtered or passed through approved sediment trapping device, or both, and discharged in inner that does not adversely affect flowing streams or offsite property. d.Material used for backfilling trenches shall be properly compacted in order to minimize erosion and promote stabilization. e.Restabilization shall be accomplished in accordance with these regulations. I. Applicable safety regulations shall be Complied with. 17.CONSTRUCTION ACCESS ROUTES: Where construction vehicle a routes intersect paved public roads, provisions shall be made to m e 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 ach day. Sediment shall be removed by shoveling o ee wping and transported to a sediment controla Disposal a Stieelwash ing shall be allowed only after sediment is removed in this m _ This provision shall apply to individual lots as well as to larger land disturbing activities. 18TEMPORARYE&S CONTROL MEASURE REMOVAL: All temporary e and sediment control m shall be removed wlthln 30 days after final site stabilization o after temporary measures are no anger needed, unless otherwise authorized by the local Program authonly. Trapped sediment and the disturbed soil or.. su ltl as from the disposition of temporary measures shall be permanently stabilized to prevent further erosion and sediment u 19.ADEOUACY OF RECEIVING CHANNELS: Properties and waterways downstream from the development site shall be protected from sediment deposition, erosion and damage, due to increases in claims, velocity and peak flow rat- of stormwater runoff for the stated frequency storm of 24-hour duration. I / / / SHED a 4f 10 /\\ Ati0J I I�I mlti PO � 1 I /Ao ' 1 O ! ,- % / JJ'' INSTALL IMLET� SASE & RRISER. COVER TOPS. / I' /47D/ SDD a _ , - D i / ° o�� I 7 to c A 00' 1 I \� ��1 I I ��Y� `/f��/ I I 9 m \ 1 , 1 . t \\ \ \ '� \ \\ 1 \ \ O O \ \\ \ \ iF ` \ ---- \ \ \ \ \ 430 � _ ---.'--Jr �w _i—W ,�-°°� �w mow_ DD 1 �\ \ , X 18" RWS q` v 'SWELLvv Av`I1---------- �`v4R`v'v vv '° �wTw --,y rm Lv VII111 1 °,° °I l \ \ o \ � ; ------- 0 U m � I Z V N� w a � N �w oG o N i7 =w `^ o'� w a mo w U IUw 7No.. 3 w4 R I _ M� 1 1 ° 1 \ \ \\ \\ 0 1 - \° ' I I I �j a�� i - - - - °A°s.5 -•vim _v AA A� 1A I OM / A �` v EI �°DEMO PORTIONS OF DRIVEWAY �w '- \w CONFLICT NTH BASIN. 'LE = V1 wX 18 , WN 3 1 1 ° -470D PI L T =ass_ II 9 _ , S, �'•Fr,DIIMofIE' N,°o BxA�I SIINVI 1 O(^WyI 0. 1 B AREAOPI H$fB / DAIN4G :6 4.q0 ACRES /-.10 -0 -470 //o STOCKPILE *Vr � ,-� --- - -- �SHP PTO) 40P p _- -_---- 0 "4O S __________ _ A - 9_____--- h� ---- - IIIII--- m�C�O� ET I O O� �/ i _____\ � �IIII I I 1 1 1� I1 v� I r I 11 /� -� � ---"-v I I I I I I I r. 1 +( ♦I I I I � // l TT �, l l 1 1t11III �v i I 47Di /� HSG A ��of/ / of • hvv j� mw mw�e4e� vv 1 \ \ \ 1 1 1 1 I I I 410 ' O o i \ b 1 ��__ ______� 1 INV. 434.E9 LL PRESERVED SLOPES \ --- _ LEGEND d � G PAVED DITCH i f/ / W IL 411 oti" /' 12 TATErROUTE 631 0 /� ��� SOIL TYPE BOUNDARY 1 RIO �OAD EAST v RUNOFF FLOW DIRECTION [� Q PRESERVED SLOPES SURVEYED < 25% D Date INV. 418.22' 09 23 2019 Scale 1" = 30' 30 0 30 60 90 Sheet No. C8 OF 19 Scale: 1"=30' File No. 16.009 SHED "� CONTRACTOR SHALL / / / ,/ /,� o ENSURE RIGHT—OF—WAY ,'/ DIVERSION IS PROPERLY ZMAINTAINED AND VERIFIED SOIL EROSION & SEDIMENT CONTROL SYMBOLS o a SYMBOL TITL= KEY �w wa 3.02 CONSTRUCTION ENTRANCE CE p a® 3.03 CONSTRUCTION ROAD STABILIZATION x —x —x —x 3.05 SILT FENCE SF 0 FUNCTIONAL AFTER ® 3,07 INLET PROTECTION Ir " EVERY WORKDAY a IC A���R @\ 3.09 TEMPORARY DIVERSION DIKE DD W uzi w 9 I I STORAGE AREA 3.13 TEMPORARY SEDIMENT TRAP ST r�y 4 w pp a [DRAWN TO SCALE] DC �N. 3.18 OUTLET PROTECTION OP w rc PO I/i 1 I I a PO VI I �(( / � � Aw � � .0 w /— / I\ i` \ T$ 3.31 TEMPORARY SEEDING TS 3.32 PERMANENT SEEDING PS i l j 1 1 ii I s 3.35 MULCH / / / / � s v* �\w18.. 3.39 DUST CONTROL DCrNro.. / I W 1 / raw w Lw _ ra�I"s1SZ",IS2SI5 3.36 SOIL STABILIZATION BLANKET SSB xTrrn a 163 PARKI G IUN�TLL ALOR \ —w w —w Tw —w / A 4- 1�1 �.[211'� W \ \ °� / SAFETY FENCE 'p AlPSTREA �w _ pp °'N8 B SIN ISvSTABILI D v w 1 S'3IONIy A 4 BASIN�IS REM vE \\ �_—� TREE PROTECTION FENCING � w � rn v 1 1 ' S � 1 v o� ♦ v I v v � v � I I � -- �_ n _ � _ � "' RWgq WL LIMITS OF DISTURBANCE m S AIELL I J 40 R --------a� _ 1 Y 47 ,' ,.•'/ � / , � III �� I �' � � � I 2 2 \a � � i' J / I � e4 I � 11 Jv� I I li `� 11 \ `�\ 1 � �'•- �i � v --____--a -----�,_-- / / / l I � , \ , 1 I w °+`:i w —m iu"o_ 0 Hz �__—_ --- PHASE 2 a / — _ \' / I 'ti------- STOCKPILE / SF / /—____— `. — — — f----� I PHASE 2 1 �'— _ — _ STOCKPILE __--___ SIC II j \ I --a'� — __— — II___l— — __ --' __ _ STOCKPILE�? JI ,- J f l l � 1 II 1 1 1 I I I 1 1��'� 1 1 1 v I i� s .�! I I I T 1 I i t� / �✓'�o,/ ___ �_ tie w t' r I I A V 1 1 1 DC A A A VA \ �§ , A � V I I i / CR C D� O � Lu SERVED SLOPES ---- 440 — — - I Z l --==--------_--------- _ / — - - IL 410 \ 09 23 2019 Scale \ 1" — 30' \ \ \ \ 30 0 30 60 90 Sheet No. C9 OF 19 File No. 16.009 OMEN° SP,BCIE AI �� "\ � SF I l / SEQUENCE OF CONSTRUCTION - STAGE 3 1. INSTALL SILT FENCE WHERE NEEDED FOR ANY FINAL PERIMETER GRADING (PRIMARILY FOR REMOVAL OF SEDIMENT BASIN AND DIVERSIONS ALONG THE PERIMETER) 2. AFTER SEDIMENT BASIN IS REMOVED, INSTALL STORMTECH BMP AND LOWER PARKING AREA. DO NOT INSTALL STORM CARTRIDGES UNTIL SITE HAS BEEN ENTIRELY STABILIZED AND SYSTEM HAS BEEN CLEANED OUT. 3. WHEN SITE HAS BEEN STABILIZED, HOUSE CONSTRUCTION MAY BEGIN. 4. DURING HOUSE CONSTRUCTION, AREAS THAT ARE NOT BEING DISTURBED MUST REMAIN STABILIZED. INSTALL SILT FENCE PROTECTION FOR LOTS UNDER CONSTRUCTION. 5.IMPORTANT: RAIN GARDENS SHALL BE INSTALLED LOT BY LOT. DO NOT INSTALL RAIN GARDENS UNTIL EACH RESPECTIVE HOUSE HAS BEEN CONSTRUCTED. THE RAIN GARDEN UNDERDRAINS SHALL BE CONNECTED TO THE STORM DRAINS WITH INSERTA-TEES AS THE FINAL STEP OF LOT SOIL EROSION & SEDIMENT CONTROL SYMBOLS SYMBOL TITL= KEY 3.02 CONSTRUCTION ENTRANCE CE 3.03 CONSTRUCTION ROAD STABILIZATION CRS SHED SF CONSTRUCTION. CONTACT DESIGN ENGINEER FOR INSPECTIONS OF THE RAIN GARDENS. x —x —x —x 3.05 SILT FENCE 6. DO NOT INSTALL BIOFILTERS UNTIL ALL UPSTREAM AREAS ARE PERMANENTLY STABILIZED. PHASE 3 - 3.07 INLET PROTECTION CT STOCKPILE V �l / / /A 3.09 TEMPORARY DIVERSION DIKE DD [DRAWN TO SCALE] 3.13 TEMPORARY SEDIMENT TRAP ST 3.18 OUTLET PROTECTION OP J w �`"� timw ml w / /�/ vv • .',� 3 / \ /� T� 3.31 TEMPORARY SEEDING TS \ / y\ 3.32 PERMANENT SEEDING PS 3.35 MULCH MU r Al-3.39 DUST CONTROL DC w DC /3A r // wl��r Lw_ 3.36 SOIL STABILIZATION BLANKET SSB X� I SAFETY FENCE �90\ TREE PROTECTION FENCING LIMITS OF DISTURBANCE ml \\ \ 1\\I\\ PROVIDE EC-2 MATTING FOR _ — \ IN THIS AREA AS NEEDED. — ,/ .� J/F/ I ' SRrP I - II ,/I/ RY TH oa SE @ /oa STOCKPILE (eve TSPnoe - 1 �` 1 ' I I 3 STORY ^ / II �� 32 % .I ]6g/sF 'tea r. y'�si r / // '--7c�C�iC PST I sToar III I I I I I - I I '.r1/ vsa sR , � /' /�////. ."'r / l.'. ��';'/�� 1111111 II I I I I I I 1 � \± I I 'I /oa v � � 1 `,� r/ � /'� F'_,� ❑ s � � � j /� 76Ba�ej"/� Boa coO ;, COMMON HOUSE AF,m� w 4 v I m AV A A V �� ('HI A 26 3 ssa s e A Ccuesais OFNGJ ti v v 1 >I ��� I I I �,A�a v v V A V \ 1 1 V A I I I 410 v 9% A v I j OFfE SPACE 8 i _ PRESERVED SLOPES \\ \•C __ — — \4zV� F B— _\ ` _ 430- — = _— — _ — — -- -- - ---- - _ --_------- -- 41p� 6ti // STATE /ROUTE 631-23 0 // RIO OAD EAST 30 0 30 60 90 Scale: 1 "=30' 17� a� 1 V M. SHIMP > NJo.. 45163 o' Z Vo NOLu N � J a g a W Nm >wQ Date 09 23/2019 Sale 1" = 30' Sheet No. C10 OF19 File No.. 16.009 s\ _ - OPEN SPACE A RW SPREE AREAHS 4.2SACBE5iA_ _ POWER POLE --_'mSmm1 _A5 47D j t HSG A 11� CONC. EAIgL TOP 3 INV=385.29 .11 E � 4�Z16 EW ROW \ BMP LADS BAYFILTER W. \ STORMTECH CHAMBERS TOTAL AREA TREATED 3.39 AC (INCLUDES 078 AC DIRECT + 2B1 AC FROM BMPS A B, & C) DROPINLET FI JTO1-398 3 INV=390 f/ itI 1 I II I I N�I I� I I I L I \ \ \ \ BEGIN R VADENING W �w 3A � �\ ♦� RAIN GARDEN DIMENSIONS -w W ate.—W—a—W- -w- m ------------- • i ' • ' ,ally...I" NAIVE IRAII 'ROOF DOWNSPOUT DETAIL C6 NOT TO SCALE RAIN GARDEN DIMENSIONS Ins 111 ��I II�R L II -II II II II II 1 I- _ (--2--Y1YP. RAIN GARDEN DETAIL C6 NOT TO SCALE, ALL ARE LEVEL I BMP'S NOTE: LOTS 1A-BA SHALL HAVE RAIN GARDENS WITH A 66 SF FOOTPRINT. (REQUIRED MINIMUM AREA = 65.1 SF) LOTS 9A-17A SHALL HAVE RAIN GARDENS WITH A 80 SF FOOTPRINT. (REQUIRED MINIMUM AREA = 79.2 SF) SEE SHEET C6 FOR REMAINING LOTS' DETAILS. BMP A: (23) 75 SF LEVEL 1 RAIN GARDENS IN PERIMETER LOTS TREATED AREA: 0.8A AS w w— '.r W . w a wv B -w W ate.—W—a—W- -w- m ------------- • i ' • ' ,ally...I" NAIVE IRAII 'ROOF DOWNSPOUT DETAIL C6 NOT TO SCALE RAIN GARDEN DIMENSIONS Ins 111 ��I II�R L II -II II II II II 1 I- _ (--2--Y1YP. RAIN GARDEN DETAIL C6 NOT TO SCALE, ALL ARE LEVEL I BMP'S NOTE: LOTS 1A-BA SHALL HAVE RAIN GARDENS WITH A 66 SF FOOTPRINT. (REQUIRED MINIMUM AREA = 65.1 SF) LOTS 9A-17A SHALL HAVE RAIN GARDENS WITH A 80 SF FOOTPRINT. (REQUIRED MINIMUM AREA = 79.2 SF) SEE SHEET C6 FOR REMAINING LOTS' DETAILS. BMP A: (23) 75 SF LEVEL 1 RAIN GARDENS IN PERIMETER LOTS TREATED AREA: 0.8A AS w w— '.r W . w a wv B Ins 111 ��I II�R L II -II II II II II 1 I- _ (--2--Y1YP. RAIN GARDEN DETAIL C6 NOT TO SCALE, ALL ARE LEVEL I BMP'S NOTE: LOTS 1A-BA SHALL HAVE RAIN GARDENS WITH A 66 SF FOOTPRINT. (REQUIRED MINIMUM AREA = 65.1 SF) LOTS 9A-17A SHALL HAVE RAIN GARDENS WITH A 80 SF FOOTPRINT. (REQUIRED MINIMUM AREA = 79.2 SF) SEE SHEET C6 FOR REMAINING LOTS' DETAILS. BMP A: (23) 75 SF LEVEL 1 RAIN GARDENS IN PERIMETER LOTS TREATED AREA: 0.8A AS w w— '.r W . w a wv B 34030 SF •• •� ;��I •� ••• TREATED AREA! 0.76 AC .•` e �•_, '•::c,�jJ f m INV. 434.29 Q" 1 4 m. stuw a No.. 45183 _J R4 _ SPACE AREA-3 41 -ET 4.77 Z Vo w U O � Lu LL � J a g IL W Nm >wQ Date 09 23/2019 SW, 1" = Sheet No. 30' 30 0 30 60 90 C11 OF19 Scale: T"=30' He No. 16.009 420 415 410 405 400 395 390 385 380 CONSTRUCTION OF A SILT FENCE (WITH WIRE SUPPORT) 1. SET POSrS AND EXCAVATE A 4"X4" 2. STAPLE WIRE FENCING TO. THE POSTS. TRENCH UPSLOPE ALONG THE LINE OF POSTS. FLOW NOTE: STR. A7 MANHOLE IS PERMANENT, WHEN BASIN IS DEWATERED, USE PRECAST RISERS TO BRING STIR. A7 INTO PERMANENT CONFIGURATION PER DETAIL 4 ON C14. TOP: 408.7 DESIGN HIGH WATER f / (25—YR. STORM ELEV.) MIN. 2.0' TOP: 406.0 MIN. 3.0' T ..., I� / 48" RISER CREST= 405.0 C: WET TOP 67 C.Y./ AC. "WET" STORAGE 6" DEWATERING DEVICE. INV. 404.0 B' SEDIMENT CLEANOUT POINT A: BOTTOM CONC. BASE DESIGN ELEVATIONS WITHOUT EMERGENCY SPILLWAY (RIGFR PASSED 9S—VR. FVFNTT A B C Riser OA Wet Vol. Wet Vol. Cy Dry Vol. Dry Vol. Cy 25 >T Elev. (Acs.) (Req.) (Prov.) (Rsq.) (Prov.) WSE 400.0 402.0 404.0 404.00 4.00 268.0. 645.0 268.0 274.0 424.00 SEDIMENT BASIN DESIGN TABLE C12 NOT TO SCALE GRAVEL CURB INLET SEDIMENT FIL TER FILTER RUNOFFGRAVEL w4A�—��.__s� — .=n� =IIIIIII�IIIIII, a�lllll IIIIII SEDIMENT CONCRETE GU ER IRE MESH ILTERED WATER SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. GRAVEL SHALL BE VOOT IS, #357 OR 5 COARSE AGGREGATE 3 INLET PROCTON P) C12 Not To Scale SAFETY FENCE PERSPECTIVE VIEW PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE METAL FENCE SOURCE: CONWED PLASTICS VDOT ROAD AND BRIDGE STANDARDS VA. DSWC %4�SAFTY FENCE (SAF) C12 Not To Scale PLATE. 3.1-1 1992 335 Source: Va. DSWC TABLE 335•A ORGANIC MULCH MATERIALS AND APPLICATION RATES RATES: MULCHES: NOTES: Per Acre Per 1000 sq. ft. Straw, or Hay 1 � - 2 tons 70 - 9016s. 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 Ibis. Do not use as mulch for 150016s. winter cover or during hot, dry periods.' Apply as slurry. cam Smlks 4 - 6 tons 185 - 275 Ibis. (}rt or shredded in 4h" 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. heat with 12 Ibs nitrogen per ton. Do not use in fine turf areas. Apply with mulch blower, chip handler, or by hand. Bark Chips 50 • 70 a. 1-2 cal. yds. Free of coarse matter. 5 MULCHING MU C12 Not To Scab 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 12.5:1 Fine Spray 235 Resin in Water 4:1 Fine Spray 300 Acrylic Emulsion (Non -Traffic) 7:1 Coarse Spray 450 Acrylic Emulsion (Traffic) 3.5:1 Coarse Spray 350 DUST CONTROL (DC) C12 Not To Scale TABLe 131-C T01n'ORARY S®mG MATOD.L 9, BEWmG RAT&4, AND DATES 3 seBcrm S®ING RATa NOR1N SOUIIi' PLANT' GNARAImaa$ncs Am I®gz - mw.we r. xmlt. ars^ lyoy®gl ' mmm wle.l R. m�•� um®rrcxAss' .in.� am. le. M.y u.Mmio�wm •"•m wowilm acvw m. .m. - - .m,.mremm. My a" �r goaPAx umum aiwlm ly I .As Mnm NoslM1cm Pieanwne W Mounuu, ss®m. Sre Plnn 3.2r-1 atl 3.22-2. n Soullern Piedmwe mq Cossral Plan. �rawm... �w4 nmP �Am andns selling. y be,ueA uemver crvp x1N rill fling. x NAY m vl,"Im - Alay pt be Panlei bmueen Asz Axles. TEMPORARY SEEDING (TS) �12 Not To Scale TEMPORARY DIVERSION DIKE Compacted Soil 1 B" —Flow 4.5' min. DIVERSION DIKE (DD) G12 Not To Scale PAVED CONSTRUCTION ENTRANCE STONE MIN. CONSTRUCTION �70' ACCESS 3• SM-2A ASPHALT TOP COURSE 2% 2Ss EXISTNG PAVEMENT 6- MIN. 2tA AGGREGATE BlSE PROFILE STONE CONSTRUCTION ACCESS "MUST EXTEND FULL OF INGRESS AND EG OPERATION �70' MIN. ASPHALT PAVED III% WASHRACK EXISTING 2x ® 21L PAVEMEM 2; 12' MIN. - WIDTH L o —POSITNE DRAINAGE RESS 11 TO SEDIMENT TRAPPING DEVICE PLAN 1�-12' MIN. POSITIVE DRAINAGE �% TO SEDIMENT ...�.... � TRAPPING DEVICE FILTER CLOTH SECTION A -A A rrrirrirmuu water tap oft htch must be hrstaDerl within uwriunwr 1 inch baDcock slmtoffvah'e snpplyiug a wash hose with a diameter of 1.5 inches for adequate constant presslDe. Wash water nurst be carried away from the entrance to a,l approved seN1hT_s; area to remove sediment. AD seclhneut sha0 be prevented 5'om entering storm drnius, ditches or wateemrrses. PAVED WASH RACK NO SCALE s PAVED CONSTRUCTION ENTRANCE CE C12 Not To Scale PERMANENT SEEDING SPECIFICATIONS Kentucky 31 Fescue ^V128J Ibs/acre: Red Top Grass — 2 Ibs/acre, Annual Rye — 20 Ibs/acre. May 1 through August 15: Kentucky 31 Fescue — 128 Ibs/acre; Red Top Gra SS — 2 Ibs%acre; Foxtail Millet — 20 Ibs/acre. August 16 through October 31: Kentucky 31 Fescue — 128 Ibs/acre; Red Tap Grass — 2 Ibs/acre; Annual Rye — 20 Ibs/acre. November 1 through February 15: Kentucky 37 Fescue — 128 Ibs/acre; Red Top Gross — 2 Ibs/acre; Winter Rye — 20 Ibs/acre. MULCHING SPECIFICATIONS: Straw or hay at a rate of 2 tons/acre. Must be anchored. Spread with mulch blower or by hand LIME AND FERTILIZER SPECIFICATIONS: Lime and fertilizer needs should be determined by soil tests. Sol tests may be preformed by the Cooperative Extension Service Soil Testing Laboratory at VPI&SU, or by a reputable commercial laboratory. Information concern ing the State Soil Testing Laboratory is vailable from CITY Exten sionAgents. Under a ual 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 are of 10-20-10 (10 his. per 1,000 square feet) or equivalent. For Temporary Seeding: Seeded areas shall be limed at a rate of 2 tons per acre, and fertilized at a rate of 600 lbs. per acre of 10-20-10 (10 lbs. per 1,000 square feet) or equivalent. LOW MAINTENANCE GROUND COVER: SOUTHEAST NATIVE GRASS SEED MIX (AMERICAN MEADOWS INC.) For slopes steeper than 3:1 grade, Mix the following seeds at 30 Ibs/acre each: Virginia Wildrye (Elymus virgin icus), Little Bluestem Grass (Schizachyrium coparium), Purpletop (Tridens flavus), Broomsedge (Andrapogon virgin icus), and Indian Grass (Sorghostrum nutons). 10PERMANENT SEEDING PS C12 Not To Scale TYPICAL VEE—SHAPED DIVERSION FOW>• Key In Filter Fabric 6" StabllizeA 61oDe 109. 6ETREMEM FREE BOARa 1 Ney In Filter Fabric 6" FlIt2 Inbr�: 1entri FW Source: Va. DSWC Plate. 3.12-1 11 CLEAN WATER DIVERSION (CWD) C12 Not To Scale N M. SHI'MP NJoJ.. 45153 W q v W /R O Vo U w � � J g � a a � W N � m >wQ Date 09 23 2019 Scale Sheet No. C12 OF19 File No. 16.009 A -A METHOD OF TREATMENT IN DROP INLETS SECTION 9-11 PLAN METHOD OF TREATMENT IN MANHOLES METHODMUM STANDARD OF SHAPING MANHOLE & INLET INVERTS .. _. 18" MIN. -•I I /— GRAVEL* (12"MIN. DEPTH) RUNOFF WITH SE wOT Jll11 ` J u llllll° °P EE� Ij J ,A. SEDIMENT FILTERED WATER GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE. r—l—'�DROP INLET PROCTION (DIP) TVNot To Sorle EARTHEN DINE PROVIDE INLET CORRUGATED METAL (COMPACTED) PAROTECTION 7 EXTENSION COLLAR WATERPROOF SEAL a A PROVIDE OUTLET FPROTECTION STANDARD FIRED END SECTION Ilr SECTION. VIEW NOTE- SEDIMENT MAY BE CONTROLLED AT OUTLET IF UPLAND BONDING WILL CREATE PROBLEMS EARTHEN DIKE (COMPACTED) 3:1 is, GTE' T t T I I I 11�111111�111111�111111�111111= SECTION A - A MESH SECTION A -A m, SECTION B-B MM-W Id f .w Lacy. TYPICN- PRECAST mT TYPICAL CONCRETE SAFETY SLAB FOR DROP INLETS,_ „ MANHOLES AND JUNCTION BOXES I I I i4�:p •:.:.. �•e�•+�O��LOOL000""- II II =- 0�=11- I . �l�II wn n=I u=i -II: IC=Lk-,II=ll IC=moo; m%�;;;„ ';lily ".'gee IAII fill -� �..•.1. .iiiii -'� %'�:��.�IV•!i�,I%�I/ii iiiil; �i NNIIN�111•/ji--- I . 01 . ru�.Il':i•:f-NN 11 f 1 0 11 Fill I 101 ILE 101111111 ..Entrench Width -I Matting 6" Matting "aPe-IrlHlll Depth -II-I I-II� I-I-I-1- r-5-�TYPICAL DITCH SECTION DETAIL V[ C( C� NOL To Scale TYPICAL GRAVEL STRUCTURE 4 )TEMPORARY SLOPE DRAIN (AS NEEDED) RIGHT OF WAY DIVERSION C13 Not To Scale C13 Not To Scale 0 11 1 ao8�6 GPM \ I noa \ 1 1 \ o . L� '\ 2 2 m O�� --�� j / //O SEDIMENT BASIN PLAN VIEW C13 SCALE: 1"=20 PIPE OUTLET CONDITIONS A A A 3d O (MIN.) 3do A do PIPE OUTLET TO WELL PLAN VIEW DEFINED CHANNEL PIPE OUTLET TO FLAT PLAN VIEW AREA WITH NO DEFINED J CHANNEL L a d SECTION A -A FLIER CLOTH IN - ED FOR ENTIRE PERIMETER NOTES: 1, APRON LINING MAY BE RIPRAP, GROUTED RIPRAP OGAB10N BASKET, OR CONCRETE, 2, La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED USING PLATES 3.18-3 AND 3.18-a. 3. d - 5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT LESS THAN 6 INCHES. 010 (cfs) La (ft) Do (ft) 3 D o (ft) d50 (in) depth (in) Outlet Condition Al 20.80 13.0 1 2.00 1 6.00 9.0 12.0 Channel (7 )OUTLET PROTECTION TABLE (OP) C13 NDt TG sGDle DRIP LINE SNOW FEN BOARD FEN CORRECT METHODS OF TREE FENCING FENCE X oo CORRECT TRUNK ARMORING TRIANGULAR BOARD FENCE TREE PROTECTION FENCING C13 Not TO ScDle 405 400 395 390 385 380 375 320 365 360 355 350 345 340 335 330 325 455 450 445 440 435 430 425 420 45 3 410 405 470 465 460 455 450 445 440 435 430 425 STORM PROFILE Al —A6 C14 1" = 30' STORM PROFILE B1—B6 C14 1^ = 30' 2 STORM PROFILE B5—H2 ME 3 Fom 1011,1C �111 YYYCu7� • Mmom MMM Elmmom MMM ME M'. MMM ' MOM ME .. MMM MI'm MMM ' AEI MC ME ME EEC ME M . ME �. ME ME ME M ME = 1 ME ME ME ME ME ME MM.. ME ME M ME � 'I A6C 415 m� P 415 q, A8 420 410 410 405 405 415 405 05 400 - 4W 410 400 - _ - a00 _ 395 - 395 405 395 - 395 390 390 00 390 390 -- 1 _ 385 385 395 385 _ 385 _ X 390 380 10+00 - 10+50 ° ep 1o+oo =-10+50 n+oo 11+sb80 3 STORM PROFILE A6A—A6Z as STORM PROFILE A6—A6C C14 J V=30' C14 1^=30' 380 �--iaV.R���eL• S %�-:RYA+.1� IN E11 IMEMEME �l� Mm ��CM �lMEM 10+00 10+50 11+00 m= D2 4420 STORM PROFILE A6—A8 C1 C2 20 � C14 1^ = 30' 425 425 415 420 420 411 410 415 411 405 405 41&F-410 a°0 = -- 400 NOTE: CONCRETE INLET SHAPING _ — (IS-1) REQUIRED ON ALL STRUCTURES 40? tim�oo 0+54P5 395 10+00 10+50 95 WITH A 4' OR GREATER DROP AND STORM PROFILE Cl—C2 SAFETY SLABS (SL-1) ON ALL r' 30' STORM PROFILE B1—D2 STRUCTURES TALLER THAN 12'. C14 =C14 1"=30' 435 430 425 420 415 410 405 440 435 430 425 420 415 410 470 465 460 455 450 445 430 440 425 435 420 430 415 425 410 420 OS 415 00 10+00 10+50 11+00 11+50 12, STORM PROFILE B2—F1 STORM PROFILE G1—G2 C14 1' = 30' C14 V = 30' 440 10 STORM PROFILE 32—E3 (a)STORM PROFILE 11-13 C14.. 1^ = 30' I 435 4 430 4 425 4 420 4 415 4 410 4 4 430 425 420 415 410 4405 10+00 10+50 11+0000 11 STORM PROFILE J l —J2 �C14 1"=30' =4MMMM 6d.'iI �N11V E 111-� � �IIii9Y!!R^V_d- II1MM" fCli�b- IM 4 STORM PROFILE 12—IA2 440 435 430 425 420 SEQUENCE OF CONSTRUCTION - OFFSITE STORM / / / / / / / A ' / /I a , / g / I / ' S STUB OUT INV=341.3' Al 1 I I. INSTALL CONSTRUCTION ENTRANCES OFF RID ROAD AS SHOWN. 2. BEGIN SEWER INSTALLATION FROM MEADOW CREEK AND WORK UPHILL. USE CWD TO ROUTE CLEAN WATER AROUND TRENCH AREA. 3. DISTURB NO MORE THAN 100' LENGTH OF TRENCH AT A TIME. 3. IMMEDIATELY COVER AND STABILIZE TRENCH AT THE END OF EACH DAY, USE SILT FENCE AS SHOWN TO PREVENT EROSION OF DISTURBED TRENCH AREAS. POLE i' INEESAN. g srwE R By oTHERs I °j ns w � , ICI J 0 I I N I nz / / �— I II 1 I I 1 1 1 � vI APPROXIMATE LOCATION L� OF FLOOD ZONE AE PER FEMA MAP I SEWER CONNECTION THROUGH TMP 61-210B C15 1" = 30' COUNTY OF ALREMA.RLE ❑epannsent of Crrmrrmnity Tkvelnpmem Construction Record Drawings (As -built) for VSMP The fallowing. is a list of information required on construction record drawings for stormwater facilities (reference Water Protection Ordinance 17422). It is preferable doer the construction record drawing be prepared by someone either than the. designer Please do not provide design drawings as construction record drawings. A. A signed and dated professional seal of the preparing engineerw surveyor. ;3.. The name and address of the firm and individual preparing the drawings on the title sheet. C. The constructed location of all items associated with each facility. and the inspection records to verify proper dimensions, materials and installalion. The items include, but are not limited to the following; 11 Tnspecdon Records and photographs for pipe trenches and hedding, including underdmins. 2. video Pipe Inspection for any pipes which are, not arecssible or viewable. 3. Updated Location with geo-coordinates of all facilities. 4, verilled Dtalnage Area maps for the drainage area nester and for drainage to the Wilirics. 5. Current physical and topographic survey for all earthen Sunda es. Ponds should include a survey of the pond bottom. Surveys should verify pond volumes are per design. Corrections may be required for allcrdlions from the design. 6. Plants, location and type. 7. Plans and prnt,les far all culverts, Pipes, Risers, Weirs and Drainage structures - Display the installed type of dr-divago structures, culved/pipe size, weirs, materials, inlets or end ttoalment(s), inlet and outlet protection, alignment and invert elevations compared m design. &. Compulalluus: For significant deviations from design, provide sealed computations verifying Unit the as -built condition is equivalent or better than design. 9. Ditch Lines - Display the c+mstr,rcted location of all ditch sines and channels, including typical seclions and linings. It). Easements - Show all platted easements with dead book references labeled, Facilities and drainage must be within planed easumems. Provide copies orruscorded documcnts. 11. Guardrail, lenses or other safety provisions - Display the mnslmeted location of all safety provisions; fences, guardrail, including the type, length and applied end treatments, compared to design. 12. Material layers biohlter media, stone layers sand layers keyways and cores must be verified as to material types and depths include inspection reports inning or test pit reports and materials curtif;cations. $tooter media must be an approved state mix 13. Access roads -show location of access roads, surface treatment, drainage, etc, as applicable. 14. Compaction reports are required to verify rill mnrpaullon in dams. 15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning. I I I I OFFSITE SANITARY SEWER BY OTHERS. 30 0 30 60 90 Scale: 1 "=30' ti I / I ° ° (�I)BIOFILTER C PLAN �i 5 1" = 20' POLE I A, - �� IIII T,S 'CE I U L1moo 1 / � I l III I I I I i'i � •7 'i� \39 S) 10 o\ I 1 g s T e / v, v IIIvA`vvv I OFFSI TE SAN. /F SEWER BV OTHERS N 450 - 450 - 4455 BED-SUREAGE -- - - — !-- 445 445 -- - - __TETER 44 � ` TOP ORAVFI __ O� C B LY 440 440 0 3CTTGM GRAVEL C„ W �-6' 440 -HBP€-Ol4T SCHEDUU-40 GRA /W �_ � JTO EDIA 5 %;00 10+50 it+Q�35 v v 1 i>• ' 'tse� V 1 I I I I �Ir i � � 1 _ �\ _" 7 A 1 � 1 I I sV A111III I I , J„ 117 A IIII t �!) A V I 1V1I 'i III nz i I L� OFFSITE SANITARY SEWER BY OTHERS. SEWER CONNECTION EROSION CONTROL PLAN 3C 0 30 60 90 Scale: 1 "=30' a�BIOFILTER D PLAN C1 1" = 20' FILTER MEDIA: 175 SF X 3.0' DEPTH. PEA GRAVEL: 175 SF X 0.25' DEPTH. f57 STONE: 175 SF X 1.75' DEPTH. 42fi OBSERV WELL & 1-YR WSE=441.42 420 10-YR WSE=445.59 25-YR WSE=446.10 415 A11/�Sr�rFCi7:71. �1711�f uru:u:c ram A—�Iff7f•TP 1�-ffiiSR111R Him--- - - --iiOtlpt00�_!�!}S!J! r_i�,nale�T. t i tt a BUD BY 6"X6" SEAL WITH _ABLE LINER. 420 1ED PEA 1-YR WSE=413.51 FILTER B/W 10-YR WSE=413.91 E SOIL MEDIA 25-YR WSE=414.17 415 TRIG OF ONLY L® 411.30 10+5U10 6" SCHEDULE 40 PERFORATED PVC INV.=413.50 (_5'�BIOFILTER C PROFILE C15 1" = 20' (-�C)BIOFILTER D PROFILE PPN­ -II NA (slw") sw.-drOft 1 21 RE V. ot 15 N FEE MA, V�'�7 8MP E SECURED WATER 50L 22 IM �_512 _-2 QUALITY VOLUME S"= TV FROM VRRIM - 4595 CIF REQ. 4657.72 CF PROVIDES. 11 21 11 *11 11". Z. IM 2 110" 1'�,M �SN IN. I'll IN 2,1, 2M X15 2 (5310.52-652.80-4637.72) 0= III. A. _0 �l '1A IXT 1. . 4.. -0 4. BOTTOM 1.0' OF STONE IS I CONS DERED "DEAD SPACE." III IAI 1 4111 THIS 652.80 CF VOLUME AN BELOW 405.50 IS NOT 0,01 "Al A' 4' I.- 1111 4"" COUNTED TOWARDS TV. NEW ROW 18"H E , TO BMP E ADS BAYFILTER W STORMTECH CHAMBERS A7 TOTAL AREA TREATED 3.39 AC (INCLUDES 0.78 I NEIR A INV AC DIRECT + 2.61 AC T W407.0 EIR FROM BMPS A, B, & C) TOP=410.0 AS mlV i 11 S ORM 8'.6' PRECAST 407.16 CONC. VAULT C VAULT 1 4'�5' REC T CON L W. BAIFILTERS I I NV ` C TM NV, 402 13 JUNC ON 0 X STOP INV=107, II S ATO ROW II N =40 00 LF 6" UL 40 P RE. PVC ry SONORAN NE� PU ICSW I . 4CS II FACILITY SMT 'MT #P7 S NE BEINo , SO.4 OTT2 13.00 41NI IOp= INV. INV. 11711 L 409.73 11 INV. / �00 48" H-1 BMP E DETAIL: ADS BAYFILTER W. STORMTECH �6 SCALE: 1"=20' M.-PROJECTINFORMATION S&ASSIST: MPE) su F. 5 LLLLLLPAl?Fm—i, M ADVANCED DRAINAGE SYSTEMS, INC. ECOVILLAGE CHARLOTTESVILLE, VA 00 STORMTECH CHAMBER SPECIFICATIONS IMPORTANT NOTES FOR THE BIDDING AND INSTALLATION OF MC450D CHAMBER SYSTEM MC45 E =.E. T. llEl 11 ��UME NOTES FOR CONSTRUCTION EQUIPMENT snExExovP BAYSAVER BAYFILTER SPECIFICATIONS --1 ­R C P-P-P.- LT ­­7 D E ATERILTEP ­­­­ C PIOPO55o Tr Z _=1 PR?.POSED EiLK N S­ F= �ILO SAYFILTER MAINZTENANCE ME— ­ ­= 8.Z­ E.31 3 = 2­1 ­ A U. YSTEM 'y U­ lElTCl -.P.S-- -.R.T­­.­­AM­­CM­R M­- -.E.- 111-A-U. MMA,��L.11�T.I�R, �L�lll -1-- _ SAYFILTER INSTALLATION NOTES ­=­.7 =28== VA.� ­M —E Y P.R -Ul D.-- -E NOTES I N-PlINS1 I 11E 111- E-Plel 111U.1-E =PS fl X4 rE NPXT`P­ I-= I== %% I, NNl%SZ`XA=Z= ­—M-1-M.— _V. Is a•. —�77 _=ll___MM­ 77# ............ - IT— ------ 7._­_PPP ­ lM...­PP­PM­­l PeR TOP-410- ­'D 11F _U. C, ­F TOP-410- 410,08 ACCEPTED --ER) D6.49 �-Y WSE -4 M� o_YR WSE= 9. �=��.FT`,,R 25 YR WSE=401 73 41 4B 4 1,7Ra ­MPEJ -P, vY SECII AA HE INVE THE OUTLET INVERT NEEDS TO BE LOWERED FOR THE _­ `T-" THE DESIGN ENGINEER MUST CHECK THIS PROPOSED I= MODIFICATION TOSHOWN ARE VERIFIED d ®0 ENSURE THE PROJECTS DESIGN REOUI­ ARE MET BY DESIGN ENGINEER. � Ili 9(a ®BAYFILTER -3 BF-1 MTYR ­E ­F 0 z Epn STEM ML­ -4- T R­ _._T. _FIIEP PLAN vl- MRMNT ­P 4 '7F 7 MATERIAL LOCATION DESCRIPTION AASHTO MATERIAL CLASSIFICATIONS COMPACTION I DENSITY REQUIREMENT OF �EE A NOTES: NO SUMP PROPOSED 377 O C ­-E MPI� DEPTH OF STONE B'DDING-12' MC4500 ISOLATOR ROW DETAIL INSPECTION & MAINTENANCE Em -PE A, 44 L ­= M_ AT PP DI =T­ 8,� 8­2' .T­ NOTES , 5oF 7 OPT.... ­­ -1 It I POP =Y47= C_ N. PE U_ DETJUL C PVC INSPECTION PORT DETAIL � 6 A* Y14 4 S '5 sl 5 L14 z O 0 � Lu LL _j g IL N J DOt, 09/23/2019 Sc.Ie Sheet No. C16 OF19 File NU. 16.00 SMAS81�ST ❑Nom ❑� na... m aTp 0 A • �� StormTech• StormTech Construction Guide Anff=,ampbm , REOUIREO MATERWLS AND EQUIPMENT LIST • Acceptable fill materiaa on, Table 1 • Sto,mT h wg° era ones, pre-oored and pre -fabricated end caps • Woven and non woven goarro . • Stormt h amm�breamandolds and muings NOTE MC 3500 chamber pallet° are 77' x 90' (2 0 m x 2 3 m) antl weigh about 2010 (ba (912 kg) end MC 4500 palaa are 1 Wx 52' (2.5 m x 1.3 m) era weigh about 840 Me. (381 kg) Unloading chambers requlres - (1.8 m) (m n 1 forks ms-t a downs (traps. [ha ra etc) IMPORTANT NOTES A. This Installation guide provides the minimum requirements for proper Installation of cbembers. Nonadhererme to this guide may result In damage to chambers rosin Instillation. Reenlistment of damned chambers during or after backflllin Is wstl and time wnsuma.iTo....... ded mat all asalars a re fnalleor g p A A 9 Y ry A with this guide, and met the comractor ins acts me chambers for tli5iortion damage iota ri a work progresses. 9 D g ) S ty s p grasses B. Use of a dozer to push embedment stone between the rows of chambers may cause damage to chambers and is not an acceptable backlill method. Any chambers Managed by using the "dump and push" method are not covered under the StormTech standard warranty. C. Cafe should be taken in the handling of chambers and end caps. End was most be stored standing upright. Avoid drapaing, prying or excesalve arcs on chambers during retwa hoe paler and Initial pMcemed. Requirements for System Installation Excavate bed and prepare subgrada per Place non -woven gaotntile over prepared sails Pace clean crushetl angular stone foundation .,gin -le mans, and up exwvalbn walls 9- (230 mm) mar, in,,, uramdraans If required. Campwt a wni°ve a Mal suews, .... Do e.aaa,ar kp,�^aa��aen mml olrnwe xowwn.�epu emenuaymners mm) nits may naesslmre rho use al .roan sad P `.e ro v,r ! 1 0� eon, tune awa'swlre Mrom]d-Ate.am Va WmstlrotrerNhar+ONmwlstlliYa[atl Deism SMems. WIN e°YVOS'IS6 lablambab�wad sameAsene o s,,.m�s. x. ca.-i- M1atssa.eel.2e94artew�xrrtpmaatylrmrreemmNatwww.slormteM.aom a an �.an comae '° �amnare d xm.tlMda4�m.� ae�w�way (mwm`°�ewsime..a.mn ma '� rabre°°w0e.�neuA m btubrm �iwi4atlwus btl wnroaa+,u. ewtrm rm eep°°wmmw,. ®� swlhhavmtlbea-wdeeass".-hare arwrMet^6aera�J e W as BAWILTER°A INSTALLATION MANUAL a=,ne aomtr1°.Ian oP Nauomeery .t.-e a�aa:�"rr�th^r",«:I osarts�:aarre;:�ale`i;°� ld h. ono queations. L Conic"al,lyI , to mark any nearby untlerdoura ut Tes z. Referencethesn.sr-rid stare o. Me ova en of tin B.Fiaz, momale/vault. eara3. Euaele unhole, prevaingarrysneeungeM shohngnecessary mpHwnn all federal, state one local .eery regulMlora. 4. LeMticesubgadetotnemoparele+anon. my'seeleveum ap rat ma manna°ivaan rime aons. me hued ale mlara. era e.ne pans Adluatmebaae.sand a fnettseary 5 Hme thsw bmnngcapecty venfietl bye lcensed eng�emfm �ere°n ore°ro�e ewnnsrepapnr. onwla aubywe thenret I the BayF nor mennolervaun B enecx ma e.a aria eevauondme not see anaenwreua Parnat belore atltl' rig any r ser Seri ors y, uatldnlonalse[aon(a era rwuiredad-sitlgmssatothe nnn-nalma e°yFltermanhde-Ift Betwele.ra astoorn7dule meow e/vauLadd nga waroNlmtsee (seal B. Ins all the outlet pipe In BoyRnm manhole/reuK 9. I1 me Ina"ropetome BayRlar mennolgheult. to. Innall the Imllay system (a ace ere ble. a. Attach ma mounting brae(( to me Ve[k b. Each track is seat In sectbns. The length and numbers omva paro,al on me vault. ll is genman, honer( rsailag anger Vack--are firs[ had a -an In a arm rho top d the breams with m. calling of the ,um. Mark the tees, of Me hole lneach breI. no remove °i o Using a mammertlml and 4a'(6 am) mil, doll a hole d. HdE'nab y3-(76 mm)daep m each mark the track beck In pin. nomagnmeara- _, 0az fit racket ngthe ( ml. Them,_ hem ) nor bolts mace only cxa g Manifold, Scour Fabric and Chamber Assembly Inaltill men Ibds and Wy ommul wore. swur AAgn the 115t chamber and and ash 0 each Continue Installlrg Chambers @ovwlaPp rig chamber antl sole the el in let rows .17.5a 5.33m vote inlet pass Comrsolor may choose nu etlons. hamne".m. r-Nd'LoWsrJCim- 9 PP C I o 9 I atsaneinlet Mtl sh.Placea Cor or a IBcdo.1 ..a Mtl ,,t Here"and"Build Insdim die, ot rJdnt" re p to postpone stun p p ppe Sieve (w names) along moire Wrglm of hambera and leave f chambers of rows open that the chamber plecent us aces not exceed the reach Dater• name) a two W rs. bo ens Ins tlon of chambers Burl me M the in I,T u, mwr) ,Ra a la ow(1 ve Y pet rg eq�iP P ce tna alone. becknll process. Maintain minlmum 8• (50 mm) °pacing batwwn MC-3500 eMbl (230 mm7 spacing bawew . nmaa rows For the Iwatrn Row place no cumin at layers d wl Woven abac bdween the Inn from slurs antl the.ends w chambers, mating sure Ise habit lays Mel And arenas ins mine wicllh Ol the chamber lest. Manifold Insertion StormTech Isolator Row Detail k' ��I��Ir1���� � �► �����III!II'��;IIII'II�'�II'��II I�� Ilf I�IIh . `Il �I �Il�llldll'��'II�II���; �II'Il►'�I full ��: Initial Anchoring of Chambers - Embedment Stone Initial mnbeamma small be spotted abrg the [solemn( of IT. cmamber evenly anchoring the knvm portion of do, chamber. This is best eccomplismetl won a stone wrrveyor rn expvator moaning Wong the row, Backfill of Chambers - Embedment Stone UNEVEN BACKFILL EVEN BACKFILL BacIdII chambers evenly stone column height should never °mar by more man 12- (300 mm) berwaen s goowt chamber rows rn between chamber rows ea pam onsr. No equipmam small no operaletl on iha bed at this stag° of me installation. Excavators must be locmetl on Imo bed. Dump lmcks-1-dump stone mrwtly on to the bed, Dozes or loaae5 are not alb'. d an the bee at trots time. PERIMETER NOT SACKFILLEO PEP METER FULLY BACKFlLLED Perimeter stone must be brought up °verily vino chamber rows Penmetar West be lolly backfillea wm..ne Bte- horizomally to the ekc 10. R Nth e "t p aaama.m w a an km awratlP.a.nma as . m�aMMw mereOEManasse-as�eN�a opa�� � :ua rymwwa tlwa •anmatlma �aaM4+m°99inAim�me�iiaa'%ttdw .°a.awdPeae.caa. r �'nraeniYtlwa a so o M aauw®I.aw°�m IB•9YI�a °I�in°paelencma,.M,m'''�T m mselwlzMo aa"W amnaanmkN : ro -1-la km,ttlaamba cr"aamasrd®+, asrtoannry wau ul:ao^n^.rra mMe"Wrt„ o o I ,III I ��I:t!;n'I�I�.o/llll��li 4,111� %1111 �m ��III Backfill of Chambers - Embedment Stone and Cover Stone cavmlen well far mom stmgmt or sloped adewetls. The -.-Al ba,Ng melha Mare wnm a store conveyor outside of tee had or ham as you EP Ah sn excavator inside the bed reaching a" the rows, Bwkfille'g sales tubing ch-lae5 roes as.1-a Us zatuna will hap to erwre iha e,uipnrent rearm is rot .- Final Backfill of Chambers - Fill Material Installs boorma9wteNWos'aone.Gedextlbmmloenso24'(600mm) where eases meal. Conga[ et z4• csoo mml aM. Roaer uava I»rMa with rows. 01 �Io ��I�IIrhII��VIII��, III%f41i1 onllyr-1 chambers have been b...I ed io top of chamber and yAm 2' (300 mml of cover stone on top of chambare can skid boa fl andtsmal LGP tlozers be usatl b frul grade rover atone antl Equi,a t rt - in acwrtlanca with t. pressure limits in Table 2. roquigrreni must pose malenal parallel to rows Dray Never b perpendicular rows.S[c,mThrecommentlsthecomelbyaored chamberrowshome ptama firma amckfil. Arty chambe5 rkmagea by comWctbn wuiPmwl (hell be mravad era reea[ed. Inserta Tee Detail aaa� .9 A* 4 M. SHTMP 453 No.. 183 J�Wj STO a. Repeat this mecedure an me epposnetrel1 of uw QU, vaunelre[uyemp.s from the-1-an. p REINFORCED STEEL f Bonin¢ a mollleya t°mealulnum leeam aaawww BMP E-ADS BAYFILTER W. WEIR PLATE B CONCRETE I eleamm.Makesurelholtbevmeea - WEIR PLATE A m,°�p°nio"�rarampu^tao,neeu,aaa„cerro„ _ STORMTECH CHAMBERS raP=alo.00 fie (prime team TOTAL AREA TREATED: "' TOP=4osso w ILA wean m ro pW[e ens �naetun bala/amro �I n �NV n¢dKauw ee[.upea nsa th.-ad 3.39 AC (INCLUDES 0.78C I WEIR A 07 z.s FHIarTse Onln Down Module TRP_ 409. 407.0 GROUT TO (apt 'nun same pm[edum ecmrwe AC DIRECT + 261 AC VIER um me via :melemm�dmesaunorac FROM BMPS A, B, & C TOP=a1 o:o sTe. e1 (ski > eesignw. BOTTOM O JUNCRON BOX) GROUT TO O m°eula. vauu name y tllmusell the PVC 11-M. Glue all wcienes wits the mrceplpnd 2 m1 I PP S ORM INV. 40700 STR. A8 (Sk6 me B.111--hous muplan&See..-drawind. AB I V. CONIC. VAULT) ` \ I2 Aherlhe Ire nesnets-remonem'snamul°Ieesmimamar 8•x6• PRECAST 407,16 debnsae.In.-a- CONC. VAULT ( I JUN N T CON d3.-11tmeaeynne. venwl�ram ow.n Mvaules(wow W. BAYFILTERS I JUNC ION OX man1 1 11""Napee. T INV. 402.83 / I STORAGE R W BOTTOM a4.lmanarow dfawdlske netne BayFlltm mnrtges. Placaeaz Flow pNk Finer Als-ent / INV=g07,0 INV. 402.83 - aanneaewtnehmteponceaomea van surer- I % I valve' fit aaeeosmrothe Deism a5 flats on°`°amp,°^°Hd°Down B°`°^dtwAeanerBredrea I i ; .WEIR PLATE A & B DETAILS V mopwe Mamwddn taog/8-hoesbreacndackeLAher furyarawnngpma nmarecxeth pacemelen mtdthe Hda I I IS ATO ROW Gown Be,1. posit sloe nomend ,. a- a. won I. IN -ao 00 Ol] SCALE: 1"=20 /\ u Bps M V tit. smas da4aM15foreash l-mein BayRnereennegesaM I I LL Hdtl o°wn BaruMltnewnole .stem kNsa(d.5ee perm UstLF I w -...9actian dr holorHadDownBmpla.m. paw Cim .masts. I EpULE 4" I 0 � W Ted Uri HB11OB�r I PEKE. PVC I LL %'Cglue andprimer I NDERDRAIN NEW PU IC SW • Crane/uu Ninneaassato-thetarte°�saure I���"""���,,f�((•••'''. 405.50 I FACILITY ESMT RIM 414,21 �I LL veultle- edge-gna-homs(a04asem I / I r7 5 NE BE DING • hearroramsartal-h mmerr°cea C°°R1PR / I (4 81. x 20. REINFORCED STEEL S. o' 420 OB I�� ,STANDARD STAIR _ eeoe. cRAOE ` sewnn[.w Pws[n 4o emnsanam needstpceadlucadl orT =aoa. 1�`11 I WEIR PLATE B 24 BPLIiiER TO INV. I OP= 13.00`"t ^ • Nemmerdrl I ' 409.73 I TOP=410.00 7.2' I80LATOft ROW LL • 11denmlene5/a DAmm)concrmsed bit L I INV. OUT 40T R 415 I' I • AAO I. mm-on eeyFlnmvaun owrvlaw veultlmem.l Aasambh I INV 413.00 TOP STONE_ For more information please see the BaySaaer 1NV. 407, 19 15" INV. IN 407.00 - ., - WS 409 O website atwww.baYsaver.com II 409.73 p. Ct 1408.00/ 1.5• X V 410 - 73 L9 Thalersynrn Or contact 1-800-229-7283 y/.O 411,48 Q 48 H-1 18" INV, IN 407,00 ' UEE > Q h /T/ IB" SPUTTER TO 405 404.50 BUTTON STORAGE ROW NV. OU407PERFORATER PVC - INV .16 NBC4k 0700 DGfe INV. 405.50' 4�+00 o+so n+oo 09 23 2019 (�!:)BMP E PLAN: ADS BAYFILTER W. STORMTECH .STRUCTURE B SPUTTER DETAIL (2)BMP PROFILE: ADS STORMTECH ISheet No. Cl] SCALE: 1"=20' SCALE: 1"=20 Ol] SCALE: 1"=20' C17 OF 19 File No, ISOLATOR ROW STEP BY STEP MAINTENANCE PROCEDURES Inspect lsotror Row fie-adimeM. THE ISOLATOR ROW ISOLATOR ROW Allmp«tipn."alk❑resem) ow Ile fpm floorboxframe 7ECTION/MAINTENANCE r. Remove sap rpm Wapactbn riser INTRODUCTION INSPECTION iii. UaWg a flasnligM1t antl erect rotl,measure tlepM dsatlimen[ and recortl rssuke on maimenance log. Animpodilm"'perealf"Stormweterpolufen Revenfon The lrequeno,of impaction aria maintenance vanes bylocafon.A W..If set iment is st or above 3 inch depth, proceed to Step 2. It non, precood to Step 3. %an is inspection antl maintenance. The StwmTser, Isolator Row utine ins ion aclretlula neetla tc be snetl einstsforexn l nwhio BI All Isdabr Rows isa patented technique to Ines❑ensiwly enhance Toral Suspe Dean.. bases upon site specific variables. The rypeol and use(i.e. LRemovacavwfm romanhdeatupsireameMoilsolabr Row SolidM s(TSS)hhm lwM provitla easy access brinspxtipn ant dulal,commerow. now —con, nnichstee pollutant loan, percent II.Uai�IgaflssMigrit.hepectdown Isolator Row through Darla(pipe malmemze. ' Imperviousness, client., stcall plryacntical rde in dowrining the 1. Mimorsan poles or camerse may be usetlroawitl aconiinee spazeeniry ual frequency of inepeek-antl maintemnce prsdicm. 2. Fallow OSHA regulations forcronfnetl space entry kenteriig manM1ole vsetlimeM is at orabow the lowerrow a sitlewall Iwlm (approximately 3 incheN, proceetl to Step 2. THE ISOLATOR ROW Ataminimum, StwmTecn recommends annual inspections.lnkially, HnoL prxeetlb3tp 3. The holmor Row is &row of StIn—cn chambers. enter, SC-160LP, 1M Isoleror Row mould be Inspected every a months forihefrst year SC-3t0,SC-310-3,SC-7g0,DC-]BO, MC-3500pr MC-4500 models, of. f operation. For subsequantyaers, the inspection shouts DB adlustetl ggapp inM is aurreuntletl with fkerfabnc oral connactetlroeclossly locate �"I mBIer°°'a0wrip"aa based upon previous obseryatipndseaimeM concoction. that I...foreasyawith fl Thoncri, and corn, tl eM1ambers prwitle let tden,neaeiu wHwma bVus TM lwlator Pow incorporots ecombinetion otatantlertl manM1ole(s)wd stretgically bcatdimp�ction pod¢ CAI A pxed fleet clawing nnee le with, new bscing noale spread d 65 imhes pr mare is preferable settling one fence not such— as stoma water races in Me lsel— his race .The inspection ports allow for easy access to Me system from Mes irl eliminating the head to B)Apply mukiple l....p shinhIuntil beckflusM1 wrier iaclean Pow ,no ukimately ms¢m M—li Me filterFabric. The open bottom perform a carMned spar.¢ entry lorinspectlon purposes. C) Vacuunon, anhole sump ss required chambers antlinim. etlsd alls(SC-310,SC-310-3antl SC-]Ao thealai vllow>rto�wvmrtonow botM1 wdicalyw,d M1w4amally out of Hupon vtual inscectionR't loutlMat sediment M1es accumulatetl.astatlt roticlwub be inssdetlro STEP& M1ambers. Setlimenis are captured in Me lsdww Row protecting tlawrninii-iospimors,awrag -1, nMeetlepthof.dimeMexceeds3lnches MroughoutMalength the SMrege areas olthe.p.nn sror.ord chambersfrom sediment of Me ladatw flow, Mclean-out.hould lea performed Replace all caps, Iles one covers, record ...—ions ant acuons. _cumulMlon. MAINTENANCE STEP& Tvmcmpi.labnes are the store s lsdatw Row.Awown9ecars. a The Isolator Pow was desigme to reduce Me coat of periodic maintenance. By liiohdsp" etlimeMa to luct Inspect&clean catch bssins antl manholes upstream of the SiwmTech system. tab to is places between Me store sod! Mato -err Pow chambers. cots are tlromatically retlucetl by aiminetrg Ma naetl ro clean ant each row of Me entiro-roar The tough d.rabl ale proviess a mediafarsrorm watwilXrstion and bed M nspMion intlicates Ma pMennal neetl br maintenance, access is provitletl vu a manhd {s) localetl on proviesseeurable sudecotormeinimanceppwations His also rrdl of MerowM out.Henby Into Me manhole is required, phase follow fecal and OSHA rules lwa L*�w tlaspnetlro prevent scourof Me untlerlying stone arts remain intact confnetls r eudng high Prmsure letting. A non -woven fabric is Placetl wertha race ¢nines. clean chambersroprovideawslmedia Icon passing Mrough Me Maintemmeis accanlNisbetl wan iM1e JMVac process. The Jewac process utilizesaM1gM1 pressure water ❑artprstiom o the sieewall dthC-aS0p w. The non -woven tbnc is Ozzie ro propel ItseHaown the imlaror Pow walla scouring and wapeneilg sadmenis. As Me nozLe is rid roquirstl over Ma OC ]aO, MC-3500wMC-4500 moaelsas Mesa StormTechlsolsWr Rowwkh navee,Un capNretl pollutant weflushetl back into Ma manhole lwwcuuming. Most sewerantl qpe chamberseondunwpertprat ecowalls. Ovwnow spillway (not to a cat) rmintemnce commnieshave vacuuMJawec combination vanicles. Salectiondan appropriate JatVac rw¢le Tha toletpr Row isty❑icallytlesigmtl rocapture Me "first gush antl will improve maintenance efficiency. FixJ nozzles tledgnetl Wr culwm or largetliameter pipe cleaning are oNers Me versatility to lea vzetl pnawlume basis or few rate basis. +w,,.,,, Prelerebt.Rewtacirgjets with an effective apreatlWMleaM a5"are best MostJMVac reels have a00 fmt An upau—nn manhole nolody Provides access to the ltut—Paw but dMssallowing malnlmanceaf an Isolator Row up 50 chambers brig. ThaJelVac preceas shall pry x typica, Inclutlmanigh flow weir sucM1 Mat storm watrflovrtats or w� be partoronetl on StormTech totter R het bawd AASHTO class t woven se—ble(as speckied by SterrKnobover Meirangularbasestene. SAMFIE MAINTENANCE LOO ...."...e...Q_;1.. g;. .e h_1. .r......e." Z_ti....,....I-C "....".,.". flowwarantl tliachwga imougnamenibltlbMe oMer cM1amners. " - stormTeM toletor Row (colto scale) • The IaolMor Row mayalco be part of a-11 pain. By treating storm Win er Prior to enby into Mechamber systm, Me__ke can „u Fextntledand p.1—has h nynrwa rainbemphinstl tmatmentleestmana9 ❑ beasunrpleas�, dsspaumP all e�p•pe<mmrnm ran �renpcac rora mo rxaswam rxc asoowmmrnwea wamrnpwedmwmeemw reovm.rrow _ "-eyR 17- I ln4 sawrm catcnbasna orcanbenrmvathreI water treatment do- Thtl g of Me Ve wm Vale and1.e,c vt} �,aaR on of prehealmeMtlwi by d i9n erg neersant by houla[ow rea—hienfa. wlreMeronahentin-la men or not aoe Nwlaeaw m� vamwmWarivea I'>A<^'.RatadI- tnaImlebr Row is recon, need by SiwmTxn ss an affect. .- to I. requiremwm and malntenarice cost. Abt.^e ,Sss the a- h Oasgn Manual air eetlled inrormatron- deaignirginttsrwaSlwmT h system, incbdinp prehotbr Row '�_ w"""v""g" �� — "_� .s. Illll__ �♦ Maintenance procedures BAYFILTERTM INSPECTION 1. Contact BaysawrTechnologies for replacement filter AND MAINTENANCE MANUAL D_ cartridgepncingandmilabilftyatl-800-229-7283. Remove Me man hole covers and open all access hatches. The BoyFilter system requires periadic maintenance to continue operating at the design erficency.The _ 3. Before entering the system make sure the air maintenance process is comprised of Me removal Is safe par OSHA Standards or use a breathing and replacement of each BayFlter cadritlge, apparatus. Use low 0, high CO, or other applicable vemlcal drain down module; and the cleaning of warning devicesperregued yrequiumems. ¢1¢IppMTnwewd.gwnee syetam the vault or manhole with a vacuum truck. aeanan q. Using a vacuum truck remove any liquld antl The maimse-es cycle &Me Witter system sockhro (st ink can be removed prior to emry. will but driven mostly by Me emus[ solids lead S, Remove Me hold down them. using. small lift or the boom on the filter. The system should be periodically &the vacuum truck, remove used cartrdges by lifting monitored to be certain It is opersongcorfactly. them out Since stormwater soids loads can be variable, Ala possible that the maintenance cycle caultl 6. Any cartridges that cennm be matlily liftetl can be easily be more Or less Man the projected duration. slid along the factor moved using the trolley system (if installed) to a Weaken they can be lifted via a boom lift. are Fllter systems In volume-thasetl application 7. When all Me cartridges have been removeQ itis assignedn treoperaat the WQv ieesn 24 to 48hours now practical M remove Me balanceofthe solids Initially. Late In Me operational cycle of the BayFlaeo and water. loosen Me stainless clamps on the 0the flow rate will diminish ass result of0 Yusion Famco couplingsforthe mendold ant remove Me When the Main down exceeds the regulated vaaor 1m1 Mamrennn<e J Asstandard, maintenance should be performed. the F pipes as well. Carefully cap Me manifold and the Ferncos and rinse the floor, wearing.way Me When&BayFllter system lsfirst lnstalletl. it is balance Of arty mmsiningcollsecdcolids. cadrMae Hdat Pant mended that It be Inspected everysix (6) 8. Clean the man'dold pipes, inspect and reinstall. months. When the filter system exhibits flows below tlesign levels the system should be maintained. Fitter 9. Install the exchange cartridges. reinstall the cartridge replacement should also he considered hold down bars and close all covers. when sediment levels are at orabove Me level of Me manifold system. Please contact Me BaySe— 10. The usetl carmages may be sent back to Technologies Engineering Depart mentformainlenance W Bay�aver Technologies for recycling. cycleestimationsOassistance at L800.229.7283.For mtion ore Informaplease see the BaySaver Weblike at www.baysaver—ran or contact 1-800-229-7283. 6b Fgar MWb and Smfia Cover • The Flim Media should ..,at 3% . 5% o,.Ik a- by ,ronndar, Wal d,.1azk it organic mare, • Cation Rrreange Clienity (CRCJ The rele ive ability of it. to hold and retain nutrient Ill.. like Ca ad K is g.2 Rhorlentioo Installation .1 C d-lion Insprtian dillaildia method a all, analysis. Soil muldw halt, is exme„W on a dry weight basis ad does not,,hate reared m as raiw a tiWl ra .dry m IT arm it measured m ae tout anrowt of positively aroged cations the, The fill,, media and suytt I, rlre r.v mfrr, hnpora, 0ernrn1, Jn 1W,nrdrIf Miry in my of lang-le Irrrf-I.W, TM Mira a Perfonrurc goals of 1. mimarti..of agiWasd coil mix al turf acecover(plane) is W worse paniu.J-(vWble) components. I soil can hold ps wit dry mans. MC ix also used as a indexof.,I ill rod reWd'hy and,l rormwnly expressed w dllwquiv.Iaas per IM grams ma,1100g)of moil W mol'Ag(equal values). Awit with a moderate 1. high EC The following is.,Wicil,... uunaa lta.h.p,aly immd a bi-sarion basin. The imWlatil Its biore,entia basin will include mulaea inspections at critical stages of w with impwta signaR that the Particular ba,t,,da, da.gand iinalraely idit,, uditaia are neer,eda rcaW illl.ekmenk, of Idath lion baits arc built in analan, with thesespwifw m. Use a&WIW inspection checklist Ibal quires a,i by quelifiW atills design i.fillsia ma ad soil permeability,. l 1.1.., Nc vomm runoff to rtmovc phlphoaa(P) arm • The overall ill, siu dislntanon M the mix Willy n1. sal frxbou ma c idicamsa greamrability docapnae antl rtain pmitively charged evntaninwls. wM1ichemvuageswndi[ions roremove elements of the biaremntion are romtfrmd azcading the approval iterated sproificelians. Aran iltamative. if illowed inJividualsm critical augur of comwetba arm to msurc oat Neconwewr's imcry.ation of the Olan ismmisrcm with d.r nudenu al ronuminusu duringawide range of slamimensities and volumes. soils if Willed. Al deal oust. theall of them acieveuthe desiredeco old phmpha Wring Nat soil rW,(prticularly fine silts adclays)ahtetleat partially responsible for CEC. The byNe VSMP A.dilty. the wnnenor may rely a the aidib'of rood ofus�e, qualifrW individual to conduit Ne ma designer'1iman. The following identifies Ne critical doges donalmmum, Iha, w idermediate ius-W. mod Wnarbilty. Thefir.,m, filter made composition Wood above carves w dW basis recipe forth three ingrWials. um CK If a bioretation soil eredia mix for pollosit halli is 5.0(moill 0 g or all-Ag) or greater. The mermedim, impwias ad eenifiwtions of compliance. The commatoe sequence for micro-biormemi. is more signnRby.yualifiW ilividuol is recommended since,.ircms can'tbevenfienaherconxw<tioniswmpletd.A Some important defrnitiona to help&dipw, ronwcmu, and materim suppliers Whiew Here all include: while the uitima perform ce gaol is to achieve a venfiW soil Whanability or hydraulic caductvidy(KsaU of l to 2 r aches per haur(or 30. 6ocadny). file,mW.aCshwldbede.wi.Mbytbe Unbuffemd Solt. Ammo mAm .,Sun onaf Chtio or Effau CEC acMdques(So., end Millar,199e)or armi.mdhla thin do not udliu awng,y acidic lltllteg wlutions.e s implifiW.Thc.W steps maybemlifiW wrenwtdiffcrent biomenhw applications orexpmlW silt conditions. w mpwtion chmklist Nal mcldacenificatiom of inspection at critical stages is providen ml. arm of ail specification. Sall lomlabull, t. rate et which sewwa,er amen t. sad Idar of the soil. InfWommi is in runs, ledW by soil swnure, wrundinsNb. manor. moisture comed,andat..]alumina no, wit affaniffial,ThedesW, •Thefollowin is the rerommendW tom ran of the three mediain tents. g pma Coatings onminemlaoil sor,fitlardi. feapon III Premmilt..n, Sr D 1-Conswdioo of the bidetenti. area may omy begin War Ne lure ndMling drainage men has Men damat& vegeutil cecdfabi,ni, all curbmoNer i,Jmswhile the Moremndon area is being mnswemd representimpotwr[ imnllWal at ore flohnnati overlookedduringconsoatani-in I,laly,-I neat or ponding (hydnWic M1ll"eW7 ar other su,fece mod subsurface soilrodiu"' during Ne receiving even[. Initial roes of I,p-dan mu istak,h d).1 Was laftna ab, dhn edu•I alumina necw varydr adifferencd -it'If o Send shill consist of silica based coaW aggregate. angular or round in shape el mcel,be mixmrc gain ill ofasy Wbepresent id,I-C,oxide, wii.20%low CEC. Thulu it is ia."" fmfilwr, diaPremovm etion, tcy No wmeamoumofmina p fines (10%-20%). present as longs Ne.nture and permeability specifications tiro herein me met. This is important Ta ThepmposW siu should be cMckW forexis,ing u,ililiea prio... ny excava,ion. lib, ndtln slasaowingreialmi, Wriod. elemenifyt"pring,Mws. ad thmIf le th. facility duringlM iniamsavk-i.. Whi. • Vilify t. proper coverage end deed, of mulch,w:grution.amil mating has been achievW following conswetion. infiLded..,hysuRace wilsean. quit rapid mod I. will dwream as the a oil used, andlm swells. mlarngro head mndull. the infloation ate will Im6libau after some period of tier, W approach and renen ac a.mmW fidriblia be low. No wbstiW ,If ahem -.1, such as diabase, calcium cadanl, male duet or dolallic and, are .-pled. 1. orracular, mice ew make a no man that 5% of,. teal sand faction. The due to the fact tudmil organic mother per u is nil ecti minaltdon of P. Srep ZTba designs and the indaller should have a an Ling. choking Ne bounders of lM caoribming d.dW area ad I. ,dual inln ellanns to are, Ney anfow w original design. Since alai convanon my M yoth on tM fitter bed and the lido I.-. • aspect Ne ullonal forbays and filer amps m verify,Ml Ncy are inadla sbtbiliu and worY"ng Permeability free below)IfIII, underlying it mix as describW below. xusd feeder may ill roe nalimitW amoum ofpwides>2.0 ram anJ <9.5 ram per the ubk tolow.bm The Cp.0 of lM it is darniad in pan by de I., If clay and/or humus or ofgwic maser present. Since the responsible for ranswcting portions IflM sin,. is quire common m find wbde differs- is aim gradin, dainage and pre properly effusively before opening the facility w mnoH. 1M overall and faoiw.. meembe rpecifrcdion.1> %ping co n, Inar. ad, ballad., radial tend axmre, had sine Ne added orgus may not Mve lhe.Isively high CEC paving devdiom thus cus produce hydraulically impoaw, iiRerenw, for the proposed bialarba area The design Check Nat weal ro Idafene dill u a m= st roaawhed an. and omnow Bare sable. PI rgy pau pain Sill media permeability: Neaea,w 0perrolelingdamwaer flows rh-11. all err it M1m tablall. Topwll is grnerally definW,the combine nott.ol.r i.gredicn,ref,,,,d. Ne buman., wit o rndie:swd.finm(,ilt end clay). and any roar etW wiiorganic maw,. Sirr,e t.objeniuof sM specification Ifs ve hum may. diffialt to achieve the i" CEC for tM n whole in freshly bladen maarias, However, it is esxpwled tho over time, netunl ecwmulatiom of organic metier will improve soil reattivityTherefore. should clearly wmmunicaa, in writing,wyp.jW, tar,a dalumal during,. preronsracuon it., h.nW asulkr and Ne pan reviewlmspwtaon audwriry' U final wee et.e of the facilit,l Ne msce's GPS ewNinaes ad submit them for en to 1. VSMP Pom Y W c a, in NOTE: I"'lrm,ia and Permeability are ,red inrerehangeably in many rot maarld, bra refer m nrro dg.enrphysinalproceaxr. irefully edablish the proper blend of these ingredient. the designer, (or comtmom .11 enrfals aupphl) mud irefully nt., ae ropoil saute or-rial in other m nil exceed lM amoum may one ingredia, he laid media mill. may require addiland wiubie organic maser w lot- ho CEC a Ne Ides p llible without overly compromising Nefi,ur meniti-sashi,n orelevdng the available P. Sag A TemporaryE carol, are needed during wnaadun of the bin ,ia area to divan suwwaar a way from P p Auaary's BMP malmenusw mocking database. G wdly.uWu,, he topsoil dcfir.daaloamy ad. lady loam, or 1. Uar the USDA Tleat Triangle) Fihrr Medea Permeability: Tha bioanemi. mil media s.uld Mve a mudean anftlwtiom ate of 11,2iWhes per the biat-don. amid it is roopil-d. Special pmadion measures such es eroswn.1.1 fabrics may. nrdod to Theinfrland. ram prnrabi,i,y of a given soil are.1sdto lM hydrae.cadrtivity ofthe mit(K). TW rate a, which will. ya accemlidl isenurnt and in e. to adw with the aitr inmedw-.reet Ne overall pedowaac bout foe 30 w60C yl. Nam: a pmW, mil mix will Mve. mill imd a. are tbat i, lumficamly highs, p-ot vulandbte sidealoms from email, during the arimdi. process. soil (anfrlrmnia), under.,I-[ mnditinm, don, very fast and,.. d ball and eventually appmm1 e, a cvfcary.Thise u, fintilw mcabd lMmil's We biliry. but is unbrullly WfiWit goal of ae soil media. • DeDlh. The sandal minimum filer red demh ranges mom 24 ad 36 wc.s fro 1 I and Level 2 designs. in M i.hW respectively. (IB,o 24 incM1es far min garden mbiorenntion).Roees are wcMden in Ne bioretmtion plusting an Stald.d Srep d. Any pre-trea,rrnt cells should beeuava,W fin, arm aensa,W ,o wpaeniments. mth,..maed 1,*,alecrondiaivary(K-)when itIual,e.1 appraache,t.irinal permeability of Ne untleflying soil o Orgertic miler ma,enals used in[he wit media mix should canals, of wellduomposW natural C-conmining plan ueepland8 fil lead4fendeepto provide.in.laseinumeforduroo swcwu medium. In almost Wl case, refercntt to vn inf lotion re. implies ail long-.w consent ma (mweabiliry or Ksal: organic materials such es pea,mall ,humus,comas,(consis.m with t. Im.riil scecifcain"' found in If mature uses. Use tun tahnuids shrub immad of Wl, to landuape shallower film( bed, Sap S. Excavators orbxkhcesshould wdk from the sidest.11a.the biaoedion are a w it appropriate design deprb 1mns2-)..rdx:pmposeafbiaWWion mod other engineered media sydem design. it is reamnable,o asumm,hm the Design Sprmadon a4 Campml San Amadmme),pine.. firs d mher mall, all conditioning Filer Medeao, Tree Pmmira Areas, Afrrem 'e fihef menu is fewa.aWd within the la.tio bola foruces, f g Sus p g and dimensions. ExavatingwuipmentsMWldhaveWwp wiandequate reachwt.y aorta Mveto sit inside,. fwtprint mil mow s.uMi lllmre 1. stwmwatW atom. equal to Nelomg-rertn Ksat of the underlying it media mix, rm,enal.However, perabeve, Necombinen soil mix should conuin 3%a5%mil organic mallerontlry weigh, basis IM Ib WWkle-Elnck -similar dry witharatio of 50%.sand,30% bposoil and No, Wnptnd, leaf rominit. of the biore.ntionarea.Contmcmrss.uld useawll wnawction approach in laaerbiorecemion bairn w.reby the basin lamaorganic saner per grams rM nmmM or wWtiral soi) Y Y Y technique. • MWrh. A S in 3 inch layer of mulch on iW surfare of the fihef then abon., plant arviva, suppresses weld al" is sill, into 500 a 1,00o sq.1. temporary ills with a 10-IS fw, eaM bridge m between, m am cells cus be excava.d Thrrefore, t. deal I of the soil media is den ere Nat hm a Not will maintain the desired gn goo pmvi porosity and pre -,tea noR.fore it reac.s Ne filnrmWia.Shredded. aged haMwood bark mulct makesevery gwdsurfam from Ne ride. permeability, while alW providing limitd wit foes and seefcimlxorgmic muser,o suppot plwlgrowhand adsorb Pend o.rd s. Itill,nad Nat mc,t. sea anal cycle of Plain growth within l.biore c I, may W advisable msurt with Wopen-coded worse awd ordeal ad armadmisoly mix in Neupwit maliss, aagnifia toeniwgen arm typically will not non way. Seep 6. It may.rttssary map th, bonan soils W a depth of 6 to 12 inches a prorwte great, imfilaa.. basin will lad to us edequaa mullion of Ma h, maw, to maintain plus, growth. The cMllap. therefore the may codain any aa, from I to 30%soil fines (lady loam, loamy awd loan) m achieve It, desired rain of ARtmalin fo Mnma Corer. In more siam., designers may cons,Ibradin lapin coven such as tun,.mile pro gh organic rooter pion p vide ere whin ,M Wits] it mead. mix In a the initial reasons Iflan, sabliament and am 'clharr andandfiW, SURcienl suiurble mgwic endment cus NenbeldW,oxhieu the 3%Io5%sWldgusr n mounit wl amine ajure ratting), river stone, or We gravel. The daivion regarding W type S f.F kfabricont. sides IflW biore.dion area with a lush ovcrla ae sides. If I ap ace ion [oneimage aye, adingll syde Wmah, Wilfinm (from Ne organic and, pight'"hilenhing siu disuibuua liust,tW Theexacicit If _ biW wfir odadmar tt. Swnmaven are rerommedW in plan II appropna of add doacon,ady3hi mla,l ac Peaf do will beh, -)which If al dogging of Wholifty. it i, alWap heit thin de, oryAale ma,ter will maiunolo dolnmal,erafi"indna,'willvary,makwgthe""Ordnicle of the lined total soilrrdiamixwre iliafreultmdefine in advanu ofevaluating available mamdals. takinal. asd-thr Width. pakinglotapplimlonsOl,n thals mil empemture andil arinae In 3 wJ adtlah-g,1,e,i. init, a,,.leer /lbs, IIll-1ka5 sal, piM. yfavel as a filar Whom. lM cnhuswaggregmioNstmdurc of Ne media mix over timeto yid in rmin.natw of pewability. adar. deleaztiWVwn,Iftor mod.. net In, inidd i Sr' Phosphorus (P), Plant -available it P sMan. within ffi,ad Hoge to (M) m • AVf.. it to pinally I adfit, i I • Medeatop,jb, '.'WOnead into top than,. Nefillith,Wa i,ntly aasusd filterwn mgaNc cameos only a 1. lop. Leaf <W the top layers will provide organic cement for the vegetative rover. If gran, is t. .itall,IiM.If inciapea 'Wndainand III .it ltriblf no slave dotage layer is used, sun wia6wc.s of p5'l amneal..nom. ad mweW with Ne layering as Jeuribed above. Sall poroaty this ad50nlla.I, his definW in T blr ForlhelInha 1 t of Dmal, 5)Virginie Nutrientl d Crio ire S40- and at. lfaisp only vegeu,ion.,he atio of comastaybereducen. ale lit,O ymvolumeofsoilmmerinl 10.002.almuawdml(ba.aid 2 of fines. defidmm eilM1oil..pnielel (k. mm)m n2usd50 herons. or particleul eslrorewn proredure,hu egrrfwrmarange oJ5ro15 mg/kg PorlHmdO mg/kg Pjorehe Meh(ieh lilprocWure. tsem2 ftI 11 ra,M S,ryS.Odu it aoil,.merift, from qualitaill,d,anddoreitonw adaanlimpervirsareaor dia, I,I W. p.ar2 and 0.03 ram) Wtnin a given soil mix It Iramed, dare Is a possibility mat Naas ors may. noshed or dga. .1 downward through the Wi, mix with each nuaff ant e,it larldly fill m aflawi. clog the void spew randomly TM filar media Alibi rodainafficiem plant eathil, Pm support initial plan[ mlablishald and plus, Srowa. the thp-tiing.Ana erifying 1Mt the nx.lia rrceds the specifcaiom, apply ar rrtlla in 12-inch lifts .,it the tlesired tap elevation of Ibe ft biorehedia area is mhi1nd. Wale few day, to check for settlement, and add additional media. a WrWd. to achieve t. thrassfainbem adcrepe preferential now plat. In the short mr this as lead what ci ling ad reduced volume reduction ad alluunt removed, and in t.long teen may clog the soil Ivyer, This tada, is offi, by addition I'unifia eofp for long term leaching. The.din t ilw W relatively loose ad no,somprhed m atfro edta.t, n er onnrred porosity to ram, the q.I- perrmeehilby (Kara) specifcmio.. Saxton design elevmiom. usd hadmass.ofa'.'i_amoum of sot, organic laser-hbinds soil fines ion larger ...mobile,images, (1986)esimv.d grnealized bulk densities and soil -roar chodctnanics from salt ax,me assumptions. Theexpwlen Sfey 9. Prepare plwting holes fro any trees usd shmbs. inaull tM vegcu,ion. usd waurrwmingly. inaull usy amporary bulk demi,y of are loamy awd soil competition described above sM1ould be in t. auee of 1.6 in I.1 W. irtigation. • Gewal Finer Media Physiai C-sho m. The mineral soil texture of the biontemion mil nix should be loamy parse satin wfth no mare Jun 1 Way, no more thus 20%sil I day mod a, leas) Ts%o11 lend -,in, hrla. very coarse lard. coarse rat Sfeg 10. P)a ae surface cola in both cells (mulch, rive, stone or mrD, depending on the design. If air wjew among will . uud in lieu of mulch. Ne mining will red w. indalId prior to plwting (Slap 9). ad holes m ilia will have a W at in 1M matting to inull t. plena. • To slow but appropriate Cation Ea,duap Capuiry(C )ad radial removal, lee mar shadd coami. m brain, )J% soiljraa(a&+cloy) mobile meeting Ne overall Iexwe.spazifiltion above. The panaclesi- analysis must W conducted SrW 11. inaull Ne plan mmerials a s.wn in ae lusdscaping pits. mod water rem during weeks afro roan for the firs) on the mall] frxtion sly of following appoprae I...at, w remove oga w muster before panicle siu analysis. two months. 9a ..'1' mammon Opeafo. SWc ,ful labluaW., of battalion areas requires this tmu, following tab. undertaken in the find year following • InldN inrpxdrum. Barr. Ira 6 months following cw„rvctian,acd.-,I. hilat. in lcast,wice at, dorm tthinlon 02iWh.fminfsll. .Spar Rl-di.g. Inepwmrs abould Ink for bare a eroding lea in ill, eornriMting Ja bass, area or around the • binnnminn area. arm make mu Ly are immediialy slabiliud win stall rover. • Fertiliwi.n. OW -time. spot failish ion may. nailed fro initial plantings. • Warming. Watering i, needed once a week during the first 2 mont.. ad Iha m needed during fro growing scaaon (April -theft, depending on rainfall. • Remove andreplan deadpianet. Since up In 10% of the pill stack may die lift in III, first yea, albut,iIs convects ,Mmld include a care and repl,aad wamamy in ensure this legation, is properly lomblMd and survives during t. fat growing lemon following anaemia, The typical threshow.s.low which reP]-- is nado d are 85% wnival of plant small and I" aurvivm of trees. 9.3. blame..., lmpeedom It is highly - mauled Nar a spring ma rtalun impaction and cleanup. woth-od at ach hinallo, area, TM following is'. lid of amc of the key maintemnce Problems Io Irk I.I. • Check to see if'15% m o(Dt, aw, (mulch pile vegetative cover) has been rhii in me bed, and measure aI depth of are remaining mulch. Check fm I inaa buildup at curb cull. gmnl diaphragms or pavement edges Nat prevent low from gating into rM • W. mod check for nine signs of bypassing. • Check for any winter -of salt -killed vegnmian. and replace it with Mmierspecies. • Note presence d an... unad sad,,dime., and trash in ae pre-manll cell or filler beds, ad remove it. • Insped balls.6&llan and grad filler stop for lidrnw of any rill or gully erosion and npeir it. • C'heck the bitalatia bed forevidence of mulch notation, excursive Waiting, dad plme or ancenvered flows, a.it Ia. ap""W" remodel action eck in . • Chnnw points fa doggie& and remove any sediment. I_ for any bare it or seNmenl Wurcm in Ne-allaing drainage area, mod d d,i nan immemintly. • CMek formogWd or d_d.aus moil mdcr ia. a ust formed on aayer, e taplirppwd=soil media, or oill'sosa ofa llifida, frlmwg lime, and redWI P'oper filwtia charaderddacs. Example mulance inspection <11WIdids for giant, w areas can be .c , in Appedix C of CMmer 9 of Ne Ve,genia Smrmwanr Management Hamlbaak (2010). k]EIS:nRll�!!1'fg:RlnRIRJ,SRfiRgRRfigRiI Main cof hideadion areas ahuultlbelnagmrcd imoroutine landscape m•tmud sk,. if lasapa, co will l,W td a perform maimenance.,Mirconvoct shouldronuin sPecificsom unigr ameanuom,antluepingnerds. rh a maimaining id"aon i iff-In' n bill for poling, proper mulching, ll ilea ad m ah removal, ,ad limitW ru of firmhun ad Waricithl. A cusomiaed nuintarrin schedule must be prepared eac h ch bilesa ion facility, since the muidaance tales will differ depending I the scale of biaremmion, the landscaping Iempin. chosen. mod the type of .,In court. A gerlwen summery of common ma ,tall. tmks mod their fquency is pro AdId in Table 93. The mad common non... I. mainameas problem involves sanding water. if it, .at an NB surface for mom thus 48 hats anma swim. djmveem„n the grading may. needed or underlain repairs may. needed. The surfae of tM filter ben shold also. chwkW for accumulated seditrnt or a fine<mst oat builds uP after the firsve t sered storm re ed events. There ounod mmds that an be used to rehabilima the filler (try the easiest things find, m Iisad WI-): • Open ae wldeNrai , blornsion well a r1lard, uW pow in att, in verify that the ad,odar, are func ping end o clogged oroN-I,.inawd of repair. TM mhW.ofail check is to see ifthere is sanding ova 111. way down through ni all. If there n sunding wear on lap. Mt not in Jar ulddrain, Nen there is a cloggen mil layer. If,M ademran mod eland pipe indicates sunding wear, as Ne undemnin sus,. cloggW end will need In. Waken. • Remove-1.1aled sedimentand 11112 m 3lWWI ofdad Intothe upperg In 12 inc.s of soil. • Innall sand racks from 3 iWhes.low the sufin a ae adalmin layer. Sall wicks can. inaulled by escalating angering (using a tree auger or simila,aD down m ae gravel storage sane no cream venieal columns wM1ich ate Nen fiilW with a clean open -galled coast awd material (comae all mix similes to tM Walloon used for the ,it male). A a fficiat rums of wick daina of wRciia dw.naia,M1ould be imul,W to neat tM de,ig, dewaherieg me for ae (riliry. • Ias,rcWn-remove and replae Waredall ofthc Wil Wia. M.IntenanseTasks • Morin of rasa litter siri sand biofetentiom turd moat At least 4 times a ear • Spot weeding, eroslan repair, .an removal, and muldr Twice during gmwlrg -.on raking • Add numfomement planting to maintain desired the vegetation density • Remove invasive plants using ra0ommendetl comml Insihdis As needed • Stabilize the contributingdrain eaaa to merosion • Spring inspaction and cleanup • Supplement mulch to maintain a 3 inch layer • Prune trees and shrubs Annually • Remove sediment in re -treatment calk and inflow posts Once main,2to9 ars • Re lace the mulch layer I Eve 3 ors Section 5. Stormwater Management Plan Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County PROJECT MANAGEMENT SHIMCIVIL ENGINEERING LAND PLANNING ENGINEERING= February 21, 2020 John Anderson, PE JU IN M. SHIMP � Department of Community Development ic. No. 45183 401 McIntire Road (v 122 Charlottesville, VA 22902a Regarding: WPO 201900053 Eco Village VSMP — SWM Calculation Packet Dear John, Enclosed is the stormwater calculation packet for Eco Village. The development property has an area of 6.53 acres, the development has a disturbance area of 5.90 acres. The project is a private redevelopment of a site. The proposed stormwater design water quality requirements set forth in 9VAC25-870-65 and water quantity requirements set forth in 9VAC25-870-66-B(4) and 9VAC25-870-66-C(3) (hereafter the 1 % rule" for erosion and flood protection analysis) This site is designed to include full onsite nutrient treatment per the Type 1113 VRRM requirements. All concentrated runoff from the site is conveyed into Meadow Creek to meet the 1 % rule. SWM Quality 9VAC25-870-65 requires that the total phosphorous (TP) nutrient load created by the site development be treated in accordance with the VRRM Redevelopment Spreadsheet reduction requirements. To achieve nutrient treatment, several onsite BMPs will be utilized. These BMPs are sized per VRRM. Onsite BMPs include: (38) Level 1 Mico-bioretention facilities (rain gardens), (2) Level 2 Bioretention Basins (biofilters), and (1) Manufactured Treatment Device BMP (ADS Bayfilter & Isolator Row). The required TP reduction is 3.52 Ibs/yr. These BMP's provide a TP treatment of 3.66 Ibs/yr. This meets the nutrient treatment requirement. As part of the site water quality requirements, 1.06 acres of the development's open space shall be dedicated as VRRM compliant SWM Forest/Open Space held in perpetuity in a vegetated state. This packet shows the BMP design calculations and the VRRM spreadsheet results. SWM Quantity 9VAC25-870-66-B(4) and 9VAC25-870-66-C(3) require that concentrated runoff from developments be analyzed for compliance with channel protection and flood protection requirements until the point where the contributing drainage area is less than or equal to 1 % of the channel's total drainage area. To satisfy this requirement, all concentrated runoff from the site will be conveyed through the proposed new storm sewer system to the discharge point at Meadow Creek. At the point of discharge, Meadow Creek has a total drainage area exceeding 3,620 acres. The Eco Village site is 6.53 acres, and thus constitutes less than 0.2% of that drainage area. This packet demonstrates the adequacy of the proposed system to that point. Per Approval of SP201800016, the storm sewer and BMP's for this site must be adequate to manage the 25-year storm without downstream flooding. As such, the storm sewer calculations (LD 229) and the BMP hydraulic analysis (HydroCAD) include the 25-year runoff. The systems have been designed to this standard. If you have any questions about this calculation packet please do not hesitate to contact me at: keane shimp-engineering.com or by phone at 434-299-9843. Keane Rucker, EIT Shimp Engineering, PC 47D ECO VILLAGE HSG A PREDEV VRRM i MAP 16 PROPERTY AREA: 6.53 AC HSG B/D j ° 1 WOODS AREA: 4.31 AC j HSG A: 3.24 HSG B: 1.07 AC ,j TURF AREA: 1.74 AC HSG A: 1.12 HSG B: 0.62 IMPERVIOUS AREA: 0.48 AC j HSG A: 0.36 AC HSG B: 0.12 AC 1 1 47D \` 1 SHED Ln e . , IgI r 181 \'ter r j�1 "ter `o I 47D It I HSG A ° � � TURF ,� e HSG B ° ° — TURF 21 HSS r / I I 1101* ° HSG A TURF '` � ATE ROUTE 631 RIO ROAD EAST 80 0 80 160 24# Scale: 1 i0 16 SHED 47D ISG A TURF TURF D 4 HSO B 47D HSG A O O TURF 0 I I URF j TURF / O O O 1 HSG B° �, 0 u 00,00 TURF TURF � I' '�t� 7D ♦ _ H G `♦1101, -- TURF - -1 = -60AMHW -_-_- - - --- -- -_ - - - - - - - - - - - - - _ - - - - - STATE ROUTE 631 RIO ROAD EAST 80 8 • 1 Scale: 1 • ECO VILLAGE POSTDEV VRRM MAP PROPERTY AREA: 6.53 AC WOODS AREA: 1.06 AC HSG A: 1.06 HSG B: 0 AC TURF AREA: 3.20 AC HSG A: 2.01 HSG B: 1.19 IMPERVIOUS AREA: 2.27 AC HSG A: 1.65 AC HSG B: 0.62 AC I i .410 \ -- 42 0, D 4 - -� NOTE: TV = TREATMENT VOLUME. TV IS OBTAINED FROM VRRM SPREADSHEET. Scale: :0 ECO VILLAGE BMP DRAINAGE MAP DA A: LEVEL 1 RAIN GARDENS ALONG PERIMETER. 0.84 AC TOTAL (0.36 AC TURF, 0.48 AC IMP) TV = 1893 CF. 23 RAIN GARDENS PROVIDED. TYP. DA PER GARDEN: 0.037 AC (.016 AC TURF, 0.021 AC IMP) TYP. TV PER GARDEN = 83 CF DA B: LEVEL 1 RAIN GARDENS INTERIOR AREA. 0.76 AC TOTAL (0.39 AC TURF, 0.37 AC IMP) TV = 1508 CF. 15 RAIN GARDENS PROVIDED. TYP. DA PER GARDEN: 0.051 AC (.026 AC TURF, 0.025 AC IMP) TYP. TV PER GARDEN = 101 CF DA �,. LLVLL C bYYJHL Y KA Y iui,4 b A6wq. TO BIOFILTER C: 0.76 AC TOTAL (0.55 AC TURF, 0.21 AC IMP) TV = 1105 CF DA D: LEVEL 2 BIOFILTRATION BASIN. TO BIOFILTER D: 0.24 AC TOTAL (0.21 AC TURF, 0.03 AC IMP) TV = 225 CF DA E: ADS BAYFILTER W. STORMTECH CHAMBERS @ 70% TP REMOVAL. 0.79 AC TOTAL (0.15 AC TURF, 0.64 AC IMP) TV = 2289 CF FROM DA D. BMP MUST ALSO TREAT REMAINING RV FROM BMPS A-C: 2306 CF. DESIGN TV = 4595 CF DA F - AREA NOT TREATED 0.47 AC TOTAL. (0.14 AC 4 TURF, 0.33 AC IMP) NO TV. _- _W vrrgsnro mm.JT ne.U-- Fwernoa ne-ueveropmen, c 132011 BMP Standards and Specifications 0 2013 Draft BMP Standards and Specifications Project Name: ECO VILLAGE Date: 2/21/2020 Linear Development Project? No Site Information Post -Development Project (Treatment Volume and Loads) Enter Total Disturbed Area (acres) 5.90 Land Cover (acres) Forest/Open Spaee (acres) -- undisturbed 4.31 fo... t/open space 3.24 1.07 Managed Turf (acres) - disturbed, graded for ya nh or other turf to be mowed/managed 1.12 0.62 1.74 Impervious Cover(acres) 0.36 0.12 0.48 Post -Development Land Cover (acres) A Solis B Soils CSoils D Solis Totals Forest/Open Space (acre s) -- undisturbed, protected forest/open space or reforested land 1.06 1.06 Managed Tod (acres) - disturbed, graded for 3.20 yards or other turf to be mowed/managed 2.01 1.19 Impervious Cover(acres) 1.65 0.62 2.27 Area Check OK. OK. OK. OK. 6.53 Check., BMP Design Specifications List: 2013 Draft Stds & Specs Linearproject? No Land cover areas entered correctly? ./ Total disturbed area entered? ./ Runoff Coefficients (Rv) - ��-®� � lllllllllllllll� ®® ®® Total Site Am (acres) ®® ®® Pre-ReDevelopment Treatment Valume I 0.0704 I 0.0E- lacre-ft) Pre-ReDevelopment Treatment Valume 3,067 2,111 (cubic feet) Pre-ReDevelopment TP Load (Ib/yr) 1.93 1.83 Pre-ReDevelopment TP Load peracre D:30 Us Baseline TP Load (Ib/yr) (0.4116s/acre/yr applied to Pre -redevelopment are a excluding Pervious 1.94 Adjusted Land Cover Summary: 're ReDevelopment land roper minus pervious fond cover fforest/,pen spacer managed urf) acreage proposed for new impervious rover, Ldjusted total acreage is consistent with Post-ReDevelopment acreage (minus acreage of lees impervious cover). :alum, l shows loud reduction requrlement far new impervious cover (based on new levelppment load limit, 0.411bs/acre/year). Final Post-Develapme Treatment Vowmen 0,2264 (acre-k) Final Post -Development Treatment Volume 9,863 (cubic feet) Final Post - Development TP Load 6.20 (lb/yr) Nnal Post -Development TP Loed peracre FL95 (Ib/acre/yd Port-ReDevelopment Forest/Open Space Cover (acres) 1.06 Weighted R,(forest) 0.02 % Forest 22% Managed Tuff Cover acres) 3,20 Weighted Rv 1t 0 0.17 % Managed Tuff 68% ReDev. Impervious cover(atrm) 0.48 Rv(impe,nous) 0.95 %Impervious 10% Total ReDev. Site Area (ages) 474 ReDev She Rv 0.21 Treatment Volume and Nutrient Load TP Load Reduction Required (lb/yr) 1 3.52 Post-ReDevelopment Treatment Valume 0.OB47 (acre-k) Post-ReDevelopment Treatment Volume 3,691 (cubic feet) Post-ReDevelopment bad (TP) 2.32 (lb/yr)' Poll -Benevelopment TP Dad peracre (Ib/aae/yr) Mo.. Reduction Regwred (aloes vre- eaevelopment toad) t0% Past -Development Treatment Volume 0,1417 (acre-k) Post -Development Treatment Vnlume(cubic 6,173 feet) TP Load Reduction TP Load Reduction Required for 0.38 Required for New 3.14 Redeveloped Area Impervious Area (Ib/yr) (lb/yr) • Reduction below new development load limitotren net required Site Results (Water Quality Compliance) Area Checks D.A. A D.A. B D.A. C D.A. D D.A. E AREA CHECK FOREST/OPEN SPACE (ac) 0.00 0.00 0.00 0.00 0.00 OK. IMPERVIOUS COVER (ac) 0.48 0.37 0.21 0.03 0.64 OK. IMPERVIOUS COVER TREATED (ac) 0.48 0.37 0.21 0.03 0.64 OK. MANAGED TURF AREA (ac) 0.36 0.39 0.55 0.21 0.15 OK. MANAGED TURF AREA TREATED (ac) 0.36 0.39 0.55 0.21 0.15 OK. AREA CHECK OK. OK. OK. OK. OK. Site Treatment Volume (ft3) 9,863 Runoff Reduction Volume and TP By Drainage Area D.A. A D.A. B D.A. C D.A. D D.A. E TOTAL RUNOFF REDUCTION VOLUME ACHIEVED (ft) 757 603 8S4 180 0 11 2,425 TP LOAD AVAILABLE FOR REMOVAL (Ib/yr) 1.19 0.95 0.69 0.14 1.44 4.41 TP LOAD REDUCTION ACHIEVED (Ib/yr) 1.03 0.82 0.67 0.14 1.01 3.66 TP LOAD REMAINING (Ib/yr) 0.16 0.13 0.02 0.00 0.43 0. 55 NITROGEN LOAD REDUCTION ACHIEVED (Ib/yr) 5.44 4.33 4.57 0.93 0.00 15.27 Total Phosphorus FINAL POST -DEVELOPMENT TP LOAD (1b/yr)jj 6.20 TP LOAD REDUCTION REQUIRED (1b/yr)jj 3.52 TP LOAD REDUCTION ACHIEVED (Ib/yr) 3.66 TP LOAD REMAINING (Ib/yr): 2.54 REMAINING TP LOAD REDUCTION REQUIRED (Ib/yr): 0.00 ** ** TARGET TP REDUCTION EXCEEDED BY 0.14 LB/YEAR ** Total Nitrogen (For Information Purposes) POST -DEVELOPMENT LOAD (Ib/yr) 44.33 NITROGEN LOAD REDUCTION ACHIEVED (Ib/yr) 15.27 REMAINING POST -DEVELOPMENT NITROGEN LOAD (Ib/yr) 29.07 14 Virginia Runoff Reduction Method Worksheet DEQ Virginia Runoff Reduction Method Re -Development Compliance Spreadsheet -Version 3.0 BMP Design Specifications List: 2013 Draft Stds & Specs Site Summary Project Title: ECO VILLAGE Date: 43882 Total Rainfall (in): 43 Total Disturbed Acreage: 5.90 Site Land Cover Summary Pre-ReDevelopment Land Cover (acres) A soils BSoils CSoils DSoils Totals %of Total Forest/Open (acres) 3.24 1.07 0.00 0.00 4.31 66 Managed Turf(acres) 1A2 0.62 0.00 0.00 1.74 27 Impervious Cover (acres) 0.36 0.12 0.00 0.00 0A8 7 6.53 100 Post-ReDevelopment Land Cover (acres) A soils BSoils CSoils DSoils Totals %of Total Forest/Open (acres) 1.06 0.00 0.00 0.00 1.06 16 Managed Turf (acres) 2.01 1.19 0.00 0.00 3.20 49 Impervious Cover (acres) 1.65 0.62 0.00 0.00 2.27 35 * Forest/Open Space areas must be protected in accordance with the Virginia Runoff Reduction Method 6.53 100 Site Tv and Land Cover Nutrient Loads Final Post -Development post- Post- Adjusted Pre- (Post-ReDevelopment ReDevelopment Development ReDevelopment & New Impervious) (New Impervious) Site Rv 0.42 0.21 0.95 0.17 Treatment Volume (ft') 9,863 3,691 6,173 2,919 TP Load (lb/yr) 6.20 2.32 3.88 1.83 Baseline TP Load(lb/yr): 1.9434* *Reduction below new developmenNoad limntion notrequired Total TP Load Reduction Required (lb/yr) 1 3.52 1 0.38 3.14 Final Post -Development Load (Post-ReDevelopment & New Impervious) Pre- ReDevelopment TN Load (lb/yr) 44.33 13.79 Pre Final Post -Development Post-ReDevelopment TP ReDevelopment TP Load per acre Load per acre TP Load per acre (lb/acre/yr) (lb/acre/yr) lb/acre r 0.39 0.9S 0.49 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Site Compliance Summary Maximum %Reduction Required Below 20% * Note: %Reduction will reduce post -development TP load to less than or equal to baseline load of 1.94 lb/yr (0.41 lb/oc/yr) Pre-ReDevelopment Load [Required reduction for Post-ReDev. = Post-ReDev TP load - baseline load of 1.9434 lb/yr], baseline load = site area x 0.41 Ib/ac/yr Total Runoff Volume Reduction (ft') 2,425 Total TP Load Reduction Achieved (lb/yr) 3.66 Total TN Load Reduction Achieved (lb/yr) 15.27 Remaining Post Development TP Load (lb/yr) 2.54 Remaining TP Load Reduction (lb/yr) Required 0.00 ** TARGET TP REDUCTION EXCEEDED BY 0.14 LB/YEAR ** *Reduction below new development load limitation not required ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Drainage Area Summary D.A. A D.A. B D.A. C D.A. D D.A. E Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0.00 Managed Turf(acres) 0.36 0.39 0.55 0.21 0.15 1.66 Impervious Cover (acres) 0.48 0.37 0.21 0.03 0.64 1.73 Total Area (acres) 0.84 0.76 0.76 0.1.4 0.79 3.39 Drainage Area Compliance Summary D.A. A D.A. B D.A. C D.A. D D.A. E Total TP Load Reduced (lb/yr) 1.03 0.82 0.67 0.14 1.01 1 3.66 TN Load Reduced (Ib/yr) 5.44 4.33 4.57 0.93 0.00 15.27 Drainage Area A Summary Land Cover Summary Summary Print 15 Virginia Runoff Reduction Method Worksheet A Soils BSoils CSoils DSoils Total %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf (acres) 0.13 0.23 0.00 0.00 0.36 43 Impervious Cover (acres) 0.23 0.25 0.00 0.00 0.48 57 0.84 BMP Selections Managed Turf Impervious Cover TP Load from Practice Credit Area Credit Area BMP Treatment Volume (ft') Upstream Untreated TP Load to Practice (Ibs) TP Removed (Ib/yr) TP Remaining (Ib/yr) Downstream Treatment to be Employed (acres) (acres) practices Ibs 6.a. Bioretention #1 or Micro-Bioretention 0.36 0.48 1,893.05 0.00 1.19 0.65 0.53 14.b. MTD -Filtering #1 or Urban Bioretention (Spec k9) 14.b. Manufactured Treatment Device - Filtering 1,135.83 0.53 0.00 0.31 0.16 Total Impervious Cover Treated (acres) 0.48 Total Turf Area Treated (acres) 0.36 Total TP Load Reduction Achieved in D.A. (lb/yr) 1.03 Total TN Load Reduction Achieved in D.A. (lb/yr) 5.44 Drainage Area B Summary Land Cover Summary A Soils BSoils CSoils DSoils Total %of Total Forest/Open (acres) 0.00 0.00 0.00 a00 0.00 0 Managed Turf (acres) 0.28 0.11 0.00 0.00 0.39 51 Impervious Cover (acres) 0.26 0.11 0.00 0.00 0.31 49 1 0.76 BMP Selections Managed Turf Impervious Cover TP Load from Practice Credit Area Credit Area 8MP Treatment Volume (ft') Upstream Untreated TP Load to Practice (Ibs) TP Removed (Ib/yr) TP Remaining (Ib/yr) Downstream Treatment to be Employed (acres) (acres) PracticesIbs 6.a. Bioretention #1 or Micro-Bioretention 0.39 0.37 1,508.27 0.00 0.95 0.52 0.43 14.b. MTD -Filtering #1 or Urban Bioretention (Spec N9) 14.b. Manufactured Treatment Device - Filtering 904.96 0.43 0.00 0.30 0.13 Total Impervious Cover Treated (acres) 0.37 Total Turf Area Treated (acres) 0.39 Total TP Load Reduction Achieved in D.A. (lb/yr) 0.82 Total TN Load Reduction Achieved in D.A. (lb/yr) 4.33 Drainage Area C Summary Land Cover Summary A Soils BSoils CSoils DSoils Total %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf (acres) 0.10 OAS 0.00 0.00 0.55 72 Impervious Cover (acres) 0.03 0.18 0.00 0.00 0.21 28 0.76 BMP Selections Managed Turf Impervious Cover TP Load from Practice Credit Area Credit Area BMP Treatment Volume (ft') Upstream Untreated TP Load to Practice (Ibs) TP Removed (Ib/yr) TP Remaining (Ib/yr) Downstream Treatment to be Employed acres acres practices Ibs 6.b. Bioretention M2 or Micro-Bioretention rig (Spec #9) 0.55 0.21 1,105.34 0.00 0.69 0.62 0.07 14.b. MTD- Filtering 14.b. Manufactured Treatment Device - Filtering 221.07 0.07 0.00 0.05 0.02 Total Impervious Cover Treated (acres) 0.21 Total Turf Area Treated (acres) 0.55 Total TP Load Reduction Achieved in D.A. (lb/yr) 0.67 Total TN Load Reduction Achieved in D.A. (lb/yr) 4.57 Summary Print 16 Virginia Runoff Reduction Method Worksheet Drainage Area D Summary Land Cover Summary A Soils BSoils CSoils DSoils Total %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf(acres) 0.17 0.04 0.00 0.00 0.21 88 Impervious Cover (acres) 0.03 0.00 0.00 0.00 0.03 13 0.24 BMP Selections Cover TP Load from Practice rea BMP Treatment Volume (ft')Practices Upstream Untreated TP Load to Practice (Ibs) TP Removed (Ib/yr) TP Remaining (Ib/yr) Downstream Treatment to be Employed Ibs 6.b. Bioretention #2 or Micro-Bioretention TEE rig (Spec #9) 225.06 0.00 0.14 0.13 0.01 14.b. MTD- Filtering 14.b. Manufactured Treatment Device - Filtering 45.01 0.01 0.00 0.01 0.00 Total Impervious Cover Treated (acres) 0.03 Total Turf Area Treated (acres) 0.21 Total TP Load Reduction Achieved in D.A. (lb/yr) 0.14 Total TN Load Reduction Achieved in D.A. (lb/yr) 0.93 Drainage Area E Summary Land Cover Summary A Soils B Soils C Soils D Soils Total % of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf (acres) 0.15 0.00 0.00 0.00 0.15 19 Impervious Cover (acres) 0.02 0.62 0.00 0.00 0.64 81 0.79 BMP Selections Managed Turf Impervious Cover TP Load from Practice Credit Area Credit Area BMP Treatment Volume (ft) Upstream Untreated TP Load to Practice (Ibs) TP Removed (Ib/yr) TP Remaining (Ib/yr) Downstream Treatment to be Employed acres acres Practices Ibs 14.b. Manufactured Treatment Device- Filtering 0AS 0.64 2,298.72 0.00 1.44 1.01 0.43 Total Impervious Cover Treated (acres) 0.64 Total Turf Area Treated (acres) 0.15 Total TP Load Reduction Achieved in D.A. (lb/yr) 1.01 Total TN Load Reduction Achieved in D.A. (lb/yr) 0.00 Runoff Volume and CN Calculations 1-year storm 2-year storm 10-year storm Target Rainfall Event (in) 1 3.03 3.67 5.54 Drainage Areas RV & CN Drainage Area A Drainage Area B Drainage Area C Drainage Area D Drainage Area E CN 79 71 68 50 87 RR (ft) 757 603 884 180 0 1-year return period RV wo RR (ws-in) 1.21 0.79 0.64 0.10 1.77 RV w RR (ws-in) C.96 0.56 0.32 0.00 1.77 CN adjusted 75 66 59 4N/A 87 2-year return period RV wo RR (we -in) 1.70 1.17 1.00 0.24 2.34 RV w RR(ws-in) 1.45 0.95 0.68 0.03 2.34 CN adjusted 75 67 62 40 87 30-year return period RV wo RR (ws-in) 3.27 2.53 1.11 ()A3 4.08 RV w RR (ws-in) 3.02 2.31 1.95 0.72 4.08 CN adjusted 76 68 64 47 87 Summary Print 17 Eco Village Rain Garden Summary Typ. DA A Garden Typ. DA B Garden Gravel Bottom El. 0.00 0.00 Soil Media Bottom 1.00 1.00 Filter Surface 2.50 2.50 Top of Berm 3.10 3.10 Riser 6" PVC Riser 6" PVC Riser Underdrain(Perf PVC) 6" @ 0.5 6" @ 0.5 Riser Rim Elev. 3.00 3.00 Pipe Out 6" PVC 6" PVC Weir Length N/A N/A Notes: 23 gardens in 15 gardens in drainage area drainage area Level of Design Level 1 Level 1 Design Volume 1893cf/23=83 1508cf/15=101 Pretreatment Vol. 12.5 cf each 15.2 cf each Impervious Area 0.48 ac 0.37 cc Required Media Area 65.10 79.22 Provided Media Area 66 80 Trees Provided 1 1 Rain Garden Sizing Calculations depth of stone 1.00 1.00 depth of media 1.50 1.50 ponding depth 0.50 0.50 equivalence depth: stone 0.4 0.4 equivalence depth: media 0.375 0.375 equivalence depth: surface 0.5 0.5 sum 1.275 1.275 TV (from VRRM) (cf) 83 101 Required area=TV / sum of equivalent depth) 65.10 79.22 Rain Garden bottom area (sf) 66 80 downspout energy downspout energy preatreatment dissipater dissipater 18 Eco Village Biofilter Summary BMP C UP D Gravel Bottom El. 440.00 412.50 Soil Media Bottom 442.50 414.50 Filter Surface 445.50 417.50 Top of Berm 447.10 418.60 Standpipe 48" Conc. Riser 24" HDPE Riser Underdrain(Perf PVC) 6" @ 441.0 6" @ 413.5 Riser Rim Elev. 446.00 418.00 15" HDPE @ 15" HDPE @ Pipe Out 439.00 411.30 Weir Length N/A N/A 1 -yr WSE 10-yr WSE 100-yr WSE Level of Design Level 2 Level 2 Design Volume (cf) 1105 231 Pretreatment Vol. (cf) 166 35 Impervious Area 20,820 sf 16,145 sf Required Media Area 746.62 170.45 Provided Media Area 750 175 Trees Required 3 1 Biofilter Sizing Calculations depth of stone 1.50 1.00 depth of media 3.00 3.00 ponding depth 0.50 0.50 equivalence depth: stone 0.6 0.4 equivalence depth: media 0.75 0.75 equivalence depth: surface 0.5 0.5 sum 1.85 1.65 note: level 2 design requires 12" stone sump, which is excluded from storage calculations. TV (from VRRM) (cf) 1105 225 Required area=TV / sum of equivalent depth) 746.62 170.45 biofilter bottom area (sf) Pretreatment volume (cf) pretreatment: 750 165.75 native grass filter strip gravel flow spreader 175 33.75 native grass filter strip gravel flow spreader 19 IVV IzWt � %, ,% - CONC. ENDWALL TOP�387.80 INV-38&28 1 1 1 1 1 1 1 1 1 1� 1 ECO VILLAGE x PREDEV INLET DRAINAGE MAP � I I° OHO / TO X1 WE/ ,I 91410 SF TOTAL 1 '1� --- _Q)��� _ CA / O ° o ° I ° \ ►1r —� i o ccn 1 o o °47p__--` ♦ 1 / ° 6 TO X4 PRE: �i I • O • • ° % ° 32820 SF / — — --- \ ° 46p . � • \ Y/ so- / - I TO X2 PRE: yy 162140 SF TOTAL � 1 /// �� ° ° ,♦ qm � � ° 11 \ \ \ • I I---- X TO X3 PRE: 4$0 41170 SF TOTAL41 ♦ \ > _ //ov ♦�� 420, — 430 ' 440 --- 7 i i STATE ROUTE 631 Gd --000.0 - - - - - - - - - % RIO ROAD EAST O -��� — — I,� 80 0 80 160 240 mmmm V.. 74 Scale: 1 "=80' r ,p off' SHED ECO VILLAGE POSTDEV INLET DRAINAGE MAP 300 SF TO 9, 20MID SF 5 SF 03 E3 OH 25 15450 F TO -X TO B5: I I - - - - 30310-SF ------ 34515 SF 0 2 VIA L T. 0 SF T6 X3-.. - ------- 29260 5F Nq D \ ' - \ \ \ _ c_, x L/ v _ - - ^- _-. -- STATE ROUTE 631 RIO ROAD EAST 80 0 80 160 240 75 Scale: 1 "=80' TO X2: 7625 SF j Eco Village LD-204 Stormwater Inlet Computations Inlets on Grade Only Sag Inlets Only E L ro z m ¢�- c o E > w o ° U Z m a U) ° O E U °' X m ¢ ro > ro ro° o `o_ Q W C m Q ° -2 x Q ° n 5 U U M U O O O cs a cs U o a O O U o 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) X4 DI-7 10 0.72 0.41 0.29 4.0 1.17 0.00 1.17 0.015 0.040 0.020 0.083 2.36 0.20 100.0% 1.17 0.00 6.5 1.90 0.00 1.90 2.84 0.24 100.0% 1.90 0.00 X3 DI-7 10 0.67 0.49 0.33 4.0 1.31 0.00 1.31 0.015 0.046 0.020 0.083 2.40 0.20 100.0% 1.31 0.00 6.5 2.12 0.00 2.12 2.88 0.24 100.0% 2.12 0.00 X2 DI-7 10 0.87 0.59 0.51 4.0 2.04 0.00 2.04 0.013 0.080 0.020 0.250 0.32 1.0 0.32 1.28 6.5 3.31 0.00 3.31 0.39 1.0 0.39 1.54 X1 CULVERT 10 0.88 0.49 0.43 4.0 1.73 0.00 1.73 0.015 0.120 0.020 0.083 100.0% 1.73 0.00 6.5 2.80 0.00 2.80 100.0% 2.80 0.00 C2 D1-313 6 0.03 0.81 0.02 4.0 0.10 0.00 0.10 0.015 0.040 0.020 0.083 0.90 0.14 100.0% 0.10 0.00 6.5 0.15 0.00 0.15 1.05 0.15 100.0% 0.15 0.00 D2 D1-313 12 0.34 0.69 0.23 4.0 0.93 0.00 0.93 0.015 0.050 0.020 0.083 2.32 0.18 100.0% 0.93 0.00 6.5 1.52 0.00 1.52 3.86 0.21 100.0% 1.52 0.00 A6C D1-36 8 0.48 0.62 0.30 4.0 1.19 0.00 1.19 0.015 0.037 0.042 - 0.13 0.5 0.25 3.70 6.5 1.93 0.00 1.93 0.17 0.5 0.35 4.43 A613 D1-36 12 0.14 0.72 0.10 4.0 0.41 0.00 0.41 0.015 0.130 0.020 - 3.11 0.06 100.0% 0.41 0.00 6.5 0.66 0.00 0.66 3.72 0.08 96.6 % 0.64 0.02 A6Z D1-36 8 0.17 0.56 0.09 4.0 0.37 0.00 0.37 0.015 0.040 0.020 0.083 3.05 0.06 100.0% 0.37 0.00 6.5 0.61 0.00 0.61 1.85 0.16 100.0% 0.61 0.00 A6A D1-313 6 0.03 0.81 0.02 4.0 0.08 0.00 0.08 0.015 0.040 0.020 0.083 0.87 0.14 100.0% 0.08 0.00 6.5 0.14 0.02 0.16 1.22 0.15 100.0% 0.16 0.00 A6 D1-313 12 0.29 0.52 0.15 4.0 0.61 0.00 0.61 0.015 0.045 0.020 0.083 1.85 0.16 100.0% 0.61 0.00 6.5 0.99 0.00 0.99 2.87 0.18 100.0% 0.99 0.00 B2 DI-3B 14 0.75 0.39 0.29 4.0 1.17 0.00 1.17 0.015 0.045 0.020 0.083 3.03 0.19 100.0% 1.17 0.00 6.5 1.90 0.00 1.90 4.58 0.22 100.0% 1.90 0.00 76 LD-229 Storm Drain Design Computations PREDEV Eco Village From Structure To Structure Catch. Area (ac) Runoff Coef Increment AC Accum. AC Total TOC (min) 25-Yr 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 X4 PRE OUT 0.75 0.39 0.29 0.29 5.00 7.48 2.19 444.77 434.29 70.00 14.97% 18 35.3 10.4 0.11 X3 PRE OUT 0.95 0.43 0.41 0.41 5.00 7.48 3.05 420.37 418.22 41.00 5.24% 18 20.8 7.5 0.09 X2 PRE OUT 3.74 0.43 1.60 1.60 5.00 7.48 11.93 390.75 385.26 59.00 9.31% 18 27.8 10.5 0.09 X1 PRE OUT 2.10 0.42 0.88 0.88 5.00 7.48 6.54 380.20 376.37 66.60 5.75% 18 21.8 8.6 0.13 77 LD-229 Storm Drain Design Computations Eco Village From To Catch. Runoff Increment Accum. Total 25 Yr Total Up Down Pipe Invert Pipe Pipe Velocity Flow time Structure Structure 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 X4 OUT 0.72 0.41 0.29 0.29 5.00 7.48 2.18 444.77 434.29 70.00 14.97% 18 35.3 11.1 0.11 X3 OUT 0.67 0.49 0.33 0.33 5.00 7.48 2.44 420.37 418.22 41.00 5.24% 18 20.8 7.9 0.09 X2 OUT 0.87 0.59 0.51 0.51 5.00 7.48 3.81 390.75 385.26 59.00 9.31 % 18 27.8 11.0 0.09 X1 OUT 0.88 0.49 0.43 0.43 5.00 7.48 3.22 380.20 376.37 66.60 5.75% 18 21.8 8.8 0.13 13* 12 Q 10: 0.90 455.10 454.10 77.05 1.30% 8 1.5 - - 12A* 12 Q 10: 0.30 457.00 456.00 52.73 1.90% 8 1.8 12' /1 Q 10: 1.20 453.60 453.20 31.99 1.25% 8 1.5 H2* 11 Q 10: 1.50 457.30 453.10 85.88 4.89% 8 2.9 - - 11 H1 0.35 0.60 0.21 0.21 5.00 7.48 1.60 453.00 443.00 201.82 4.95% 12 8.6 8.4 0.40 H1 B5 0.29 0.60 0.17 0.39 5.40 7.33 2.83 440.00 437.00 29.88 10.04% 12 12.2 12.7 0.04 B5 B4 0.79 0.49 0.39 0.77 5.44 7.32 5.66 433.00 427.70 36.64 14.47% 15 26.7 17.3 0.04 B4 B3 0.36 0.58 0.21 0.98 5.48 7.30 7.17 426.70 415.50 110.01 10.18% 15 22.0 16.0 0.11 E3* E2 Q 10: 1.50 427.00 418.00 153.21 5.87% 8 3.2 E2 E1 0.33 0.55 0.18 0.18 5.00 7.48 1.35 414.70 413.50 11.85 10.13% 12 15.4 12.1 0.02 E1 B2 0.24 0.39 0.09 0.27 5.02 7.47 2.05 411.30 409.20 42.03 5.00% 15 15.7 9.5 0.07 J2* J1 Q 10: 0.60 413.25 412.90 16.20 2.16% 8 2.0 - - G2* G1 Q 10: 1.15 431.00 423.00 168.63 4.74% 8 2.9 F1 * 82 Q 10: 1.15 421.00 413.50 164.08 4.57% 8 2.8 - - B2 131 0.92 0.72 0.66 1.92 5.09 7.44 14.26 409.00 407.00 50.55 3.96% 18 21.9 12.0 0.07 C2 C1 0.03 0.81 0.02 0.02 5.00 7.48 0.18 410.40 408.00 28.67 8.37% 15 20.2 11.6 0.04 D2 131 0.34 0.69 0.23 0.23 5.00 7.48 1.75 408.00 407.00 51.61 1.94% 15 10.8 6.3 0.14 A7 A6 2.17 5.00 7.48 16.25 402.83 402.43 10.65 3.76% 18 22.1 13.6 0.01 A6C A613 0.48 0.62 0.30 0.30 5.00 7.48 2.22 395.50 392.20 44.15 7.47% 15 19.1 10.4 0.07 A613 A6A 0.14 0.72 0.10 0.40 5.07 7.45 2.97 392.00 389.50 40.40 6.19% 15 17.4 10.6 0.06 A6Z A6A 0.17 0.56 0.09 0.09 5.00 7.48 0.70 387.70 387.20 32.60 1.53% 15 11.0 5.0 0.11 A6A A6 0.03 0.81 0.02 0.51 5.11 7.44 3.82 387.00 386.20 33.38 2.40% 15 10.8 8.1 0.07 A7 A6 2.17 5.10 7.44 16.16 400.43 389.00 122.69 9.32% 18 34.8 13.9 0.15 A6 A5 0.29 0.52 0.15 2.84 5.18 7.41 21.04 386.00 384.20 50.10 3.59% 18 21.6 13.8 0.06 A5 A4 2.84 5.24 7.39 20.97 384.00 378.00 66.58 9.01 % 18 8.4 13.7 0.08 A4 A3 2.84 5.30 7.37 20.91 373.00 360.00 88.22 14.74% 18 43.7 24.4 0.06 A3 A2 2.84 5.36 7.35 20.85 355.00 343.50 72.92 15.77% 18 45.2 25.0 0.05 A2 Al 2.84 5.41 7.33 20.80 338.50 335.00 56.19 6.23% 24 61.2 17.6 0.05 Note: All Postdev flow to Existing Culverts X1-X4 under Rio Rd East is less than the Predev flow. " 8" Pipes will carry rain garden runoff. Typ. 8" pipe serves max. (5) rain gardens. Qio calculated from Rain Garden HydroCAD Drainage area runoff, multiplied by # of gardens served. 78 ECO VILLAGE Orange cells need input, white cells are calculations. Basin SB-1 Step 1: Preliminary Design Top of Dam 408.7 Downstream Toe of Dam 400.0 Barrel length (ft) 127.0 Slope of principal spillway barrel (%) 13.6% Step 2: Calculate Runoff Rational Method Drainage Area (ac) 4.00 C 0.8 I2 4.3 125 6.6 Q2 (cfs) 12.9 Q25 (cfs) 19.8 Step 3: Principal Spillway From Plate 3.14-$.W= Spillway Capacity with emergency spillway (cfs) 19.8 Riser Diameter (in) 48 Actual head (ft) 0.70 QP (max) 24.0 Step 4: Emergency Spillway From Table 3.14-C Required spillway capacity 0.0 HP 0.0 b - Bottom width (ft) 0 S - slope of exit channel (ft/foot) 0.00 X - minimum length of exit channel (f 0 SteD 5: Grade Basin Design Parameters Maximum Top of wet Storage 406.0 Required Wet + Dry Storage (cf) 14,472 Wet Storage Required Volume (cy) 268 Required Volume (cf) 7,236 Minimum Standpipe Invert 404.0 Cleanout Required Volume (cy) 132 Cleanout Required Volume (cf) 3,564 Design I Elevation Area Bottom of Wet Stora2ej 400.0 1 1,4 132 Basin Cleanout Top of Wet Cleanout Volume (cf) Wet Storage Volume (cf) Wet Storage Volume (cy) Dry Storage Required Volume (cy) Required Volume (cf) Maximum Top of Dry Storage Bottom of Dry Top of Dry Dry Storage Volume (cf) Dry Storage Volume (cy) SB-1 401.0 1,780 402.0 2,161 403.0 2,577 404.0 3,030 3,578 8,751 324 268 7,236 406.7 Design Elevation Area (s Storage 404.0 3,030 405.0 3,720 Storage 406.0 4.350 Step 6: Final Details Upstream Toe of Dam Principle Spillway Elevation Trash rack and anti -vortex device From Table 3.14-D: . Diameter (in) Height (in) From Retention Basin Design and Plate 3.14-B: Head on barrel (ft) QP (max) Barrel diameter (in) Dewatering Orifice Design Riser Height h (ft) S (cf) Q (cfs) A (sf) d (ft) Dewatering Orifice Diameter (in) Flexible Tubing Diameter (in) Baffle Calculation Length of Flow (L) (ft) Effective Width (We) (ft) L/We Baffles Required? 7,410 274 400.0 405.0 72 16.0 28.9 6.0 1.0 7,410 0.34 0.071 0.301 6 8 70 3.2 no 133 3 722170 38° 3 9 N e V 7 M O M N V 38° 2' 46" N 722170 722240 722310 722380 3 in Map Scale: 1:2,030 if printed on B portrait (11" x 17") sheet. N Meters 0 30 60 120 180 Feet 0 50 100 20D 300 Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 17N WGS84 usDA Natural Resources Web SW%urvey r Conservation Service National Cooperative Soil Survey Hydrologic Soil Group —Albemarle County, Virginia, and Charlottesville City, Virginia 722240 722310 722380 722450 722450 722520 722520 N W 722590 38° 3' 9" N N V 7 38° 2' 46" N 722590 3 F v N 8/1 /2019 Page 1 of 5 Hydrologic Soil Group —Albemarle County, Virginia, and Charlottesville City, Virginia Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 16 Chewacla silt loam B/D 0.5 2.1 % 21 B Culpeper fine sandy B 7.6 35.6% loam, 2 to 7 percent slopes 47D Louisburg sandy loam, A 13.3 62.1 % 15 to 25 percent slopes 48E Louisburg very stony A 0.0 0.0% sandy loam, 25 to 45 percent slopes Subtotals for Soil Survey Area 21.4 99.8% Totals for Area of Interest 21.4 100.0% Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 47D Louisburg sandy loam, 15 to 25 percent slopes A 0.0 0.2% Subtotals for Soil Survey Area 0.0 21.4 0.2% Totals for Area of Interest 100.0% usDA Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 8/1 /2019 Page 4 of 5 141 Precipitation Frequency Data Server https://hdsc.nw s. noaa. gov/hdsc/pfds/pfds_printpage.html?lat=3 8.0483 &... NOAA Atlas 14, Volume 2, Version 3 Location name: Charlottesville, Virginia, USA'' Latitude: 38.0483°, Longitude:-78.4651- Elevation: 408.24 ft" source: ESRI Maps 4, „<.d .. source: USGS F 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 Duration Average recurrence interval (years) 1 ���������� 2 5 10 25 50 100 200 500 1000 0.353 0.493 0.624 0.678 0.729 7 0.421 0.554 F 0.777 F 0.834 0.881 5-mm (0.318-0.392) (0.379-0.467), (0.444-0.546) (0.498-0.613) (0.558-0.688) (0.604-0.747) (0.645-0.803) (0.683-0.856) (0.726-0.922) (0.760-0.977) 0.563 7 F 0.673 7 F 0.789 0.886 7 F 0.994 1.08 1.16 1.23 1.32 1.39 10-min (0.508-0.626) (0.607-0.746) (0.710-0.875) (0.796-0.981) (0.889-1.10) (0.962-1.19) (1.03-1.28) (1.08-1.36) (1.15-1.46) (1.20-1.54) 0.704 0.846 0.999 1.12 1.26 1.37 1.46 1.55 F 1.66 1.74 15-min (0.635-0.783) (0.763-0.938) (0.899-1.11) (1.01-1.24) (1.13-1.39) 1 (1.22-1.51) 1 (1.30-1.61) 1 (1.37-1.71) 1 (1.45-1.84) 1 (1.50-1.93) 0.966 1.17 1.42 1.62 1.87 2.06 2.24 2.42 2.64 1 2.82 30-min (0.871-1.07) (1.05-1.30) 1 (1.28-1.57) 1 (1.46-1.80) 1 (1.67-2.06) 1 (1.83-2.27) 1 (1.99-2.47) 1 (2.13-2.67) 1 (2.30-2.92) 1 (2.43-3.13) 1.82 1.20 1.47 2.11 2.49 2.79 3.09 3.39 3.79 4.12 60-mm (1.09-1.34) (1.32-1.63) (1.64-2.02) (1.90-2.34) (2.22-2.74) (2.49-3.08)] (2.74-3.40) 1 (2.98-3.74) 1 (3.30-4.19) 1 (3.55-4.57) 1.45 1.76 2.20 2.58 3.08 3.49 3.91 4.36 4.97 5.49 2-hr (1.27-1.66) 1 (1.54-2.00) 1 (1.93-2.50) 11 (2.27-2.93) 1 (2.68-3.48) (3.03-3.95) 1 (3.38-4.42) 1 (3.73-4.92) 1 (4.21-5.62) 1 (4.60-6.22) 1.59 1.92 2.40 2.82 3.36 3.82 4.28 4.77 5.45 6.03 3-hr (1 .39-1.82) 1 (1.68-2.21) 1 (2.10-2.76) 1 (2.45-3.23) 1 (2.91-3.84) 1 (3.29-4.35) 1 (3.67-4.88) 1 (4.06-5.44) 1 (4.58-6.22) 1 (5.00-6.89) 2.02 2.44 3.03 3.57 4.29 4.92 5.58 6.29 7.31 8.20 F6-h7r (1.79-2.29)J (2.15-2.77) (2.67-3.43) 11 (3.13-4.04) (3.74-4.85) (4.25-5.54) (4.78-6.29) (5.33-7.09) (6.10-8.24) _(6.75-9.26) 2 54 3.06 3.82 4.52 5.50 6.37 7.31 8.35 9.88 1.3E 12-hr F-1 (2.24-2.91) 3.03 (2.70-3.50) 3.67 (3.35-4.37)l 4.69 (3.96-5.16)J 5.54 (4.78-6.25) 6.81 (5.48-7.23) 7.90 (6.21-8.29) 9.10 (7.00-9.46) (8.13-11.2) 9.11-12.8) 14.1 10.4 12.4 24-hr (2.72-3.40) 1 (3.30-4.12) 1 (4.20-5.26) 1 (4.95-6.20) 1 (6.04-7.59) 1 (6.96-8.79) 1 (7.95-10.1) 1 (9.01-11.6) 1 (10.5-13.8) 1 (11.8-15.6) 3.58 4.33 5.51 6.49 7.89 9.07 10.4 11.7 13.8 15.5 2-day (3.21-4.00) 1 (3.89-4.85) 1 (4.94-6.16) (5.79-7.23) j (7.00-8.78) (7.98-10.1) (9.04-11.5) 1 (10.2-13.1) 1 (11.8-15.4) 1 (13.1-17.3) 3.81 4.61 5.86 6.89 8.38 9.63 11.0 12.5 F 14.6 16.4 3-day (3.46-4.22) 1 (4.19-5.11) 1 (5.31-6.49) 1 (6.23-7.62) 1 (7.53-9.25) 1 (8.59-10.6) 1 (9.73-12.1) 1 (10.9-13.7) 1 (12.7-16.2) 1 (14.1-18.2) 4.04 4.89 6.21 7.30 8.87 10.2 11.6 13.2 15.4 17.3 4-day (3.71-4.44) (4.49-5.38) (5.69-6.83) (6.66-8.00) (8.06-9.72) (9.20-11.2) (10.4-12.7) (11.7-14.4) (13.5-16.9) (15.0-19.1) 4.70 5. 55 7.07 8.23 9.90 11.3 12.8 14.4 16.7 18.6 7-day L 4 ( .32-5.12) (5.20-6.17) .49-7.71) (7.53-8.97) (9.01-10.8) (10.2-12.3) (11.5-13.9) (12.8-15.7) (14.7-18.3) (16.2-20.4) 5.32 6.39 -7-.89-1 9.11 F 10.8 F 12.2 F 13.7 1 F 15.3 17.5 19.4 10-day 1 (4.92-5.76) 1 (5.91-6.91) (7.28-8.53) (8.39-9.85) 1 (9.93-11.7) (11.2-13.2)J (12.4-14.8) 1 (13.8-16.6) (15.6-19.0) (17.1-21.1) 6.99 8.34 10.1 11.4F 13.3 14.7 16.2 17.7 19.8 21.4 20-day (6.55-7.48)_ (7.81-8.92) 1 (9.42-10.8) 1 L(12.4-14.2)](13.7-15.8) 1 (15.0-17.4) 1 (16.3-19.0) 1 (18.1-21.3) 1 (19.4-23.1) 10.2 12.0 13.4 22.5 8.57 3 30-day [(75.-F-16-.7-�F-1-8.0-F-1-9.4-F-2-1.2- (8.07-9.13) (9.57-10.8) (11.3-12.8) (12.6-14.3) 16.3) 1 (15.6-17.7) (16.8-19.2) (18.0-20.7) 1 (19.5-22.6) 1 (20.7-24.1) 10.7 12.6 14.8 16.4 18.4 19.9 21.4 22.8 24.6 26.0 F457-day7 (10.1-11.3)J (11.9-13.4) (14.0-15.6) 11 (15.5-17.3) (17.3-19.5) 1 (18.7-21.1) 1 (20.1-22.7) (21.3-24.2) (22.9-26.2) (24.1-27.7) 12.6 14.8 17.1 18.8 20.9 22.5 24.1 25.5 27.4 28.7 60-day 11 1 (11.9-13.2) (14.0-15.6) 1 (16.2-18.0) 1 (17.8-19.8) 1 (19.8-22.1) 1 (21.2-23.8) 1 (22.6-25.4) 1 (23.9-27.0) 1 (25.6-29.0) 1 (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 checked 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 143 1 of 4 11/13/2018, 5:19 PM Section 6. Pollution Prevention Plan. (reference County Code 17-404 and State Regulation 9VAC25-880-70 part II section A.4) A. Plan showing pollution activities and prevention practices Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County B. 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 ands ills 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 com ounds. 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. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Waste collection area will not receive a substantial amount of runoff from upland areas and does not drain directly to a 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.) D. Non-stormwater di; Discharge Dust Control Treatment Pollutants or Pollutant Constituents chemicals Location on Site Designated areas and details shown on Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County e I 1 \ MATERIAL Is' DELIVERY AREA SPILL KIT TP/ STATION �f -}CONTRACTOR �e \ LAYDOWN/ 9 �` STORAGE AREA RAIN GAG �/ I LOCATIONo 9 ISP DC / Pc Pc 00 00"°I�� 3 1 9 ECO VILLAGE POLL UTIONPREVENTIONPLAN PORTAJOHNS, TRASH, AND RINSE SUPPLY CONTRACTOR SHALL ENSURE RIGHT—OF—WAY DIVERSION IS PROPERLY MAINTAINED AND VERIFIED FUNCTIONAL AFTER EVERY WORKDAY E NOTE: CONCRETE CLEANOUT NEAR ENTRANCE SHALL HAVE A LEAKPROOF CONTAINER SOIL EROSION & SEDIMENT CONTROL SYMBOLS SYMBOL NO. TITLE KEY 3.02 CONSTRUCTION ENTRANCE CE 3.03 CONSTRUCTION ROAD STABILIZATION CRS —X X X X — 3.05 SILT FENCE SF 3.07 INLET PROTECTION P 3.09 TEMPORARY DIVERSION DIKE DD TS 3.31 TEMPORARY SEEDING TS PS 3.32 PERMANENT SEEDING PS ivy 3.35 MULCH �--�� 3.39 DUST CONTROL DC LIMITS OF DISTURBANCE R D �/ / \�,� �•�� LIMITS OF NOTE: CONTRACTOR CAN RELOCATE G9 ,• `. _ �w DD e DISTRURBANCE POLLUTION PREVENTION ITEMS BUT _ CONCRETE CLEANOUT MUST MARK UP DRAWINGS WITH ibAND WASH RACK. I o WD `_1 - I_w USE TRAPPING DEVICE I \ 1 / ! w w L _ \--1 AND PUMP WASH > \ DON T IN�SSAL�L LO�ER ��� \„� ' w ��w ;•_w UPDATED LOCATION. 1 �I "9 q"RACK RUNOFF INTO I I \ \ > \ 0 \PARK UNTIL ALL \ \ \ 4 w �w I 9�„ i I SEDIMENT BASIN. 1 ` ER - - 'PAAG REA QSTREAI%\ THE 430 - c-w �w _w 8 I 9 I , _ 1 0 - OP osIN IS\STABILI D .— DD e LIMITS OF DISTURBANCE TO BE ��C 0 I � � \ 11 `\\ \\ \ �� • A Q BASIL\IS REM�VE \\ ' —° �� w w w _ e\ °' \\\ �\\\�1 '_\® `\\ \`. ' , � .o � r •,� �'I .\ \\ \ 1 S o ��� `��= _—_-_�—_—�,—"—w—w_w_ FIELD MARKED WITH WHITE �, __ FLAGS OR WHITE PAINT \ \�L `\ \ t `� ` t 1 \\ P I \ r ------ 450 \ \ h \-_- �� \`11� _ . - ♦ I 3 I \ \ I ,7 \\ I , ,'^ �\ wow DD 8 v vvv--- � • � �� v� \ I i -. �I v � M \ _ f \1w>w \\ \1,`w_ Mew , r If + 10 / I I Il i � \ \\ i �' `— m \ \ o� — — `�_"`�• ---,�, ' nop M, _ ,T 1 ' / / T / / , O 11 1 _• •�.• C1 0, I ' \ 10 ` • • s�--- /III _ 1 r C, •• a y---------- 8— --_ / 1 II B SAPHASE 2 , STOCKPIL'SF _ __------_——_--__—__\_`—__ �—-- -- --- _1 PHASE 2 460 —— — — � STOCKPILE ______-ERING - - - - - - - - - P I ; I " I I I FUELING AREA STOCKPI E \\�j / % ,.p v^ /�''PS DD , , i 1 ISO - \\ I I 1 yo / s _tl \` F. ',\ II i �` /// /'�/ 5 •i' ;a ` `SPILL KIT e \ N� SPILL KIT / ' /I T ' U N i PAVING-- �/`o STATION LIMITS OF o � g \\ \\ STATION s f f I e 1`\ / ' / yv'' (TPYP)ATI s �' ��r�,� DISTRURBANCE p N W 410 PAVING � 4S OPERATIONS 0 'SCR DC I� (TYP) o ��� 00 it \ ♦ _ ♦ �� \ `� i �D 8 � I MONO \ _= 0 - -- --- ------------------ ----- 60 0 60 120 180 1;q SPILL KIT / STATION g D C)o WWO cp I 1 / Ry -- f S 9 CONCRRETE 7 OPERATI,NS 0 1; b` I , Lo ? \\ \ ` \�\ 1 4 CONCRETE CLEANOUT V \ /\\\X\II'400 ' 00LEAKPROOF CONTAINER 1,1 / 1 i l i l I 1 I I 1 1 \ 1 9 tW0 cW.O C� \''� O O I \ O O N W I N \I 1\ 1\ Oft; rn 00\� 410 I i I � PORTAJOHNS, TRASH, AND RINSE SUPPLY 7 PHASE 3 \_ STOCKPILE RAIN GAGE LOC TION r �f PAVING OPERATIONS ' (TYP) r = / ,I /f/ I--J f T P. FUELING AREA ry �IS SPILL KIT STATION 2s - ECO VILLAGE POLL UTIONPREVENTIONPLAN LIMITS OF DISTRURBANCE t�aw r r`' wLw-� _ w 430 w--w wTw 7r_w I � 5 SOIL EROSION & SEDIMENT CONTROL SYMBOLS SYMBOL NO. TITLE KEY 3.02 CONSTRUCTION ENTRANCE CE 3.03 CONSTRUCTION ROAD STABILIZATION CRS -X X X X - 3.05 SILT FENCE SF 3.07 INLET PROTECTION P 3.09 TEMPORARY DIVERSION DIKE DD TS 3.31 TEMPORARY SEEDING TS PS 3.32 PERMANENT SEEDING PS ivy 3.35 MULCH �--�� 3.39 DUST CONTROL DC LIMITS OF DISTURBANCE POLLUTION PREVENTION ITEMS, BUT MUST MARK UP DRAWINGS WITH UPDATED LOCATION. LIMITS OF DISTURBANCE TO BE FIELD MARKED WITH WHITE FLAGS OR WHITE PAINT 1 / S \w _w 47 _I 1 TS o �c�n•_• TYP. HOUSE / ' ; I .. y • •m 5 T )US 0 — 1NT -� 1 PHASE 3 �t 5 46 - F �T STOCKPILE i \\ \ d 10 4 0 5 ss ' Y . SPILL KIT ' STATION ... PAVING . :1� N N ! I OPERATI �• / i'i 7 � � Syr �.�.:. (TYP) 10 - -`-•- rtrr CONCRETE CLEANOUT W. 1 I I LEAKPROOF CONTAINER �©F e 7 I TYP F00- 470 S -� TO ----------------- LIMITS OF DISTRURBANCE o -- - PAVING— 4s0 OPERATIONS (TYP) fE CLEANOUT W. �_` o )OF CONTAINER r - 1— _ -� e - - - / I 430 ---- ---_-- /--------- —440=--_-_---- / 60 0 60 120 180 Scale: 1 "=60' E. Persons responsible for pollution prevention practices Property owner's representative: Dave Redding 480 Rio Rd East Charlottesville, VA 22901 434-926-9505 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. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. 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; Contractor to be selected from list of qualified personnel. SWPPP shall be updated to list Qualified Personnel when contractor is selected or during the preconstruction meeting, at the latest. 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: l Company:C-� Title: tC-- Signature: Date: b 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: Company: Title: Signature: Date: 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, 2019 Expiration Date: June 30, 2024 GENERAL VPDES PERMIT FOR DISCHARGES OF STORMWATER FROM CONSTRUCTION ACTIVITIES AUTHORIZATION TO DISCHARGE UNDER THE VIRGINIA STORMWATER MANAGEMENT PROGRAM AND THE VIRGINIA STORMWATER MANAGEMENT ACT In compliance with the provisions of the Clean Water Act, as amended, and pursuant to the Virginia Stormwater Management Act and regulations adopted pursuant thereto, operators of construction activities are authorized to discharge to surface waters within the boundaries of the Commonwealth of Virginia, except those specifically named in State Water Control Board regulations that prohibit such discharges. The authorized discharge shall be in accordance with the registration statement filed with the Department of Environmental Quality, this cover page, Part I - Discharge Authorization and Special Conditions, Part II - Stormwater Pollution Prevention Plan, and Part III - Conditions Applicable to All VPDES Permits as set forth in this general permit. Construction General Permit Effective July 1, 2019 Page 2 of 26 PART DISCHARGE AUTHORIZATION AND SPECIAL CONDITIONS A. Coverage under this general permit. 1. During the period beginning with the date of coverage under this general permit and lasting until the general permit's expiration date, the operator is authorized to discharge stormwater from construction activities. 2. This general permit also authorizes stormwater discharges from support activities (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, borrow areas) located on -site or off -site provided that: a. The support activity is directly related to the construction activity that is required to have general permit coverage for discharges of stormwater from construction activities; b. The support activity is not a commercial operation, nor does it serve multiple unrelated construction activities by different operators; c. The support activity does not operate beyond the completion of the last construction activity it supports; d. The support activity is identified in the registration statement at the time of general permit coverage; e. Appropriate control measures are identified in a stormwater pollution prevention plan and implemented to address the discharges from the support activity areas; and f. All applicable state, federal, and local approvals are obtained for the support activity. B. Limitations on coverage 1. Post -construction discharges. This general permit does not authorize stormwater discharges that originate from the site after construction activities have been completed and the site, including any support activity sites covered under the general permit registration, has undergone final stabilization. Post -construction industrial stormwater discharges may need to be covered by a separate VPDES permit. 2. Discharges mixed with nonstormwater. This general permit does not authorize discharges that are mixed with sources of nonstormwater, other than those discharges that are identified in Part I E (Authorized nonstormwater discharges) and are in compliance with this general permit. 3. Discharges covered by another state permit. This general permit does not authorize discharges of stormwater from construction activities that have been covered under an individual permit or required to obtain coverage under an alternative general permit. Page 3 of 26 4. Impaired waters and total maximum daily load (TMDL) limitation. a. Nutrient and sediment impaired waters. Discharges of stormwater from construction activities to surface waters identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit for (i) sediment or a sediment -related parameter (i.e., total suspended solids or turbidity) or (ii) nutrients (i.e., nitrogen or phosphorus) are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a stormwater pollution prevention plan (SWPPP) in accordance with Part II B 5 of this permit that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations and implements an inspection frequency consistent with Part II G 2 a. b. Polychlorinated biphenyl (PCB) impaired waters. Discharges of stormwater from construction activities that include the demolition of any structure with at least 10,000 square feet of floor space built or renovated before January 1, 1980, to surface waters identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit for PCB are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a SWPPP in accordance with Part II B 6 of this permit that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations, and implements an inspection frequency consistent with Part II G 2 a. 5. Exceptional waters limitation. Discharges of stormwater from construction activities not previously covered under the general permit effective on July 1, 2014, to exceptional waters identified in 9VAC25-260-30 A 3 c are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a SWPPP in accordance with Part II B 7 of this permit and implements an inspection frequency consistent with Part II G 2 a. 6. There shall be no discharge of floating solids or visible foam in other than trace amounts. C. Commingled discharges. Discharges authorized by this general permit may be commingled with other sources of stormwater that are not required to be covered under a state permit, so long as the commingled discharge is in compliance with this general permit. Discharges authorized by a separate state or VPDES permit may be commingled with discharges authorized by this general permit so long as all such discharges comply with all applicable state and VPDES permit requirements. D. Prohibition of nonstormwater discharges. Except as provided in Parts I A 2, 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; Page 4 of 26 3. Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance; 4. Oils, toxic substances, or hazardous substances from spills or other releases; and 5. Soaps, solvents, or detergents used in equipment and vehicle washing. E. Authorized nonstormwater discharges. The following nonstormwater discharges from construction activities are authorized by this general permit when discharged in compliance with this general permit: 1. Discharges from firefighting activities; 2. Fire hydrant flushings; 3. Waters used to wash vehicles or equipment where soaps, solvents, or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge; 4. Water used to control dust that has been filtered, settled, or similarly treated prior to discharge; 5. Potable water sources, including uncontaminated waterline flushings, managed in a manner to avoid an instream impact; 6. Routine external building wash down where soaps, solvents or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge; 7. Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (or where all spilled or leaked material has been removed prior to washing); where soaps, solvents, or detergents have not been used; and where the wash water has been filtered, settled, or similarly treated prior to discharge; 8. Uncontaminated air conditioning or compressor condensate; 9. Uncontaminated ground water or spring water; 10. Foundation or footing drains where flows are not contaminated with process materials such as solvents; 11. Uncontaminated excavation dewatering, including dewatering of trenches and excavations that have been filtered, settled, or similarly treated prior to discharge; and 12. Landscape irrigation. F. Termination of general permit coverage. 1. The operator of the construction activity shall submit a notice of termination in accordance with 9VAC25-880-60, unless a registration statement was not required to be submitted in accordance with 9VAC25-880-50 A 1 c or A 2 b for single-family detached residential structures, to the VSMP authority after one or more of the following conditions have been met: Page 5 of 26 a. Necessary permanent control measures included in the SWPPP for the site are in place and functioning effectively and final stabilization has been achieved on all portions of the site for which the operator has operational control. When applicable, long term responsibility and maintenance requirements for permanent control measures shall be recorded in the local land records prior to the submission of a complete and accurate notice of termination and the construction record drawing prepared; b. Another operator has assumed control over all areas of the site that have not been finally stabilized and obtained coverage for the ongoing discharge; c. Coverage under an alternative VPDES or state permit has been obtained; or d. For individual lots in residential construction only, final stabilization as defined in 9VAC25- 880-1 has been completed, including providing written notification to the homeowner and incorporating a copy of the notification and signed certification statement into the SWPPP, and the residence has been transferred to the homeowner. 2. The notice of termination shall be submitted no later than 30 days after one of the above conditions in subdivision 1 of this subsection is met. 3. Termination of authorization to discharge for the conditions set forth in subdivision 1 a of this subsection shall be effective upon notification from the department that the provisions of subdivision 1 a of this subsection have been met or 60 days after submittal of a complete and accurate notice of termination in accordance with 9VAC25-880-60 C, whichever occurs first. 4. Authorization to discharge terminates at midnight on the date that the notice of termination is submitted for the conditions set forth in subdivisions 1 b through 1 d of this subsection unless otherwise notified by the VSMP authority or department. 5. The notice of termination shall be signed in accordance with Part III K of this general permit. G. Water quality protection. 1. The operator shall select, install, implement, and maintain control measures as identified in the SWPPP at the construction site that minimize pollutants in the discharge as necessary to ensure that the operator's discharge does not cause or contribute to an excursion above any applicable water quality standard. 2. If it is determined by the department that the operator's discharges are causing, have reasonable potential to cause, or are contributing to an excursion above any applicable water quality standard, the department, in consultation with the VSMP authority, may take appropriate enforcement action and require the operator to: a. Modify or implement additional control measures in accordance with Part II C to adequately address the identified water quality concerns; b. Submit valid and verifiable data and information that are representative of ambient conditions and indicate that the receiving water is attaining water quality standards; or Page 6 of 26 c. Submit an individual permit application in accordance with 9VAC25-870-410 B 3. All written responses required under this chapter shall include a signed certification consistent with Part III K. PART II STORMWATER POLLUTION PREVENTION PLAN A. Stormwater pollution prevent plan. A stormwater pollution prevention plan (SWPPP) shall be developed prior to the submission of a registration statement and implemented for the construction activity, including any support activity, covered by this general permit. SWPPPs shall be prepared in accordance with good engineering practices. Construction activities that are part of a larger common plan of development or sale and disturb less than one acre may utilize a SWPPP template provided by the department and need not provide a separate stormwater management plan if one has been prepared and implemented for the larger common plan of development or sale. 2. The SWPPP requirements of this general permit may be fulfilled by incorporating by reference other plans such as a spill prevention control and countermeasure (SPCC) plan developed for the site under § 311 of the federal Clean Water Act or best management practices (BMP) programs otherwise required for the facility provided that the incorporated plan meets or exceeds the SWPPP requirements of Part II B. All plans incorporated by reference into the SWPPP become enforceable under this general permit. If a plan incorporated by reference does not contain all of the required elements of the SWPPP, the operator shall develop the missing elements and include them in the SWPPP. 3. Any operator that was authorized to discharge under the general permit effective July 1, 2014, and that intends to continue coverage under this general permit, shall update its stormwater pollution prevention plan to comply with the requirements of this general permit no later than 60 days after the date of coverage under this general permit. B. Contents. The SWPPP shall include the following items: 1. General information. a. A signed copy of the registration statement, if required, for coverage under the general VPDES permit for discharges of stormwater from construction activities; b. Upon receipt, a copy of the notice of coverage under the general VPDES permit for discharges of stormwater from construction activities (i.e., notice of coverage letter); c. Upon receipt, a copy of the general VPDES permit for discharges of stormwater from construction activities; d. A narrative description of the nature of the construction activity, including the function of the project (e.g., low density residential, shopping mall, highway, etc.); e. A legible site plan identifying: Page 7 of 26 (1) Directions of stormwater flow and approximate slopes anticipated after major grading activities; (2) Limits of land disturbance including steep slopes and natural buffers around surface waters that will not be disturbed; (3) Locations of major structural and nonstructural control measures, including sediment basins and traps, perimeter dikes, sediment barriers, and other measures intended to filter, settle, or similarly treat sediment, that will be installed between disturbed areas and the undisturbed vegetated areas in order to increase sediment removal and maximize stormwater infiltration; (4) Locations of surface waters; (5) Locations where concentrated stormwater is discharged; (6) Locations of any support activities, including (i) areas where equipment and vehicle washing, wheel wash water, and other wash water is to occur; (ii) storage areas for chemicals such as acids, fuels, fertilizers, and other lawn care chemicals; (iii) concrete wash out areas; (iv) vehicle fueling and maintenance areas; (v) sanitary waste facilities, including those temporarily placed on the construction site; and (vi) construction waste storage; and (7) When applicable, the location of the on -site rain gauge or the methodology established in consultation with the VSMP authority used to identify measurable storm events for inspection as allowed by Part II G 2 a (1) (ii) or Part II G 2 b (2). 2. Erosion and sediment control plan. a. An erosion and sediment control plan designed and approved in accordance with the Virginia Erosion and Sediment Control Regulations (9VAC25-840), an "agreement in lieu of a plan" as defined in 9VAC25-840-10 from the VESCP authority, or an erosion and sediment control plan prepared in accordance with annual standards and specifications approved by the department. b. All erosion and sediment control plans shall include a statement describing the maintenance responsibilities required for the erosion and sediment controls used. c. An approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department -approved annual standards and specifications, implemented to: (1) Control the volume and velocity of stormwater runoff within the site to minimize soil erosion; (2) Control stormwater discharges, including peak flow rates and total stormwater volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion; Page 8 of 26 (3) Minimize the amount of soil exposed during the construction activity; (4) Minimize the disturbance of steep slopes; (5) Minimize sediment discharges from the site in a manner that addresses (i) the amount, frequency, intensity, and duration of precipitation; (ii) the nature of resulting stormwater runoff; and (iii) soil characteristics, including the range of soil particle sizes present on the site; (6) Provide and maintain natural buffers around surface waters, direct stormwater to vegetated areas to increase sediment removal, and maximize stormwater infiltration, unless infeasible; (7) Minimize soil compaction and, unless infeasible, preserve topsoil; (8) Ensure initiation of stabilization activities, as defined in 9VAC25-880-1, of disturbed areas immediately whenever any clearing, grading, excavating, or other land - disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 days; and (9) Utilize outlet structures that withdraw stormwater from the surface (i.e., above the permanent pool or wet storage water surface elevation), unless infeasible, when discharging from sediment basins or sediment traps. 3. Stormwater management plan. a. Except for those projects identified in Part II B 3 b, a stormwater management plan approved by the VSMP authority as authorized under the Virginia Stormwater Management Program (VSMP) Regulation (9VAC25-870), or an "agreement in lieu of a stormwater management plan" as defined in 9VAC25-870-10 from the VSMP authority, or a stormwater management plan prepared in accordance with annual standards and specifications approved by the department. b. For any operator meeting the conditions of 9VAC25-870-47 B of the VSMP regulation, an approved stormwater management plan is not required. In lieu of an approved stormwater management plan, the SWPPP shall include a description of, and all necessary calculations supporting, all post -construction stormwater management measures that will be installed prior to the completion of the construction process to control pollutants in stormwater discharges after construction operations have been completed. Structural measures should be placed on upland soils to the degree possible. Such measures must be designed and installed in accordance with applicable VESCP authority, VSMP authority, state, and federal requirements, and any necessary permits must be obtained. 4. Pollution prevention plan. A pollution prevention plan that addresses potential pollutant - generating activities that may reasonably be expected to affect the quality of stormwater discharges from the construction activity, including any support activity. The pollution prevention plan shall: a. Identify the potential pollutant -generating activities and the pollutant that is expected to be exposed to stormwater; Page 9 of 26 b. Describe the location where the potential pollutant -generating activities will occur, or if identified on the site plan, reference the site plan; c. Identify all nonstormwater discharges, as authorized in Part I E of this general permit, that are or will be commingled with stormwater discharges from the construction activity, including any applicable support activity; d. Identify the person responsible for implementing the pollution prevention practice or practices for each pollutant -generating activity (if other than the person listed as the qualified personnel); e. Describe the pollution prevention practices and procedures that will be implemented to: (1) Prevent and respond to leaks, spills, and other releases including (i) procedures for expeditiously stopping, containing, and cleaning up spills, leaks, and other releases; and (ii) procedures for reporting leaks, spills, and other releases in accordance with Part III G; (2) Prevent the discharge of spilled and leaked fuels and chemicals from vehicle fueling and maintenance activities (e.g., providing secondary containment such as spill berms, decks, spill containment pallets, providing cover where appropriate, and having spill kits readily available); (3) Prevent the discharge of soaps, solvents, detergents, and wash water from construction materials, including the clean-up of stucco, paint, form release oils, and curing compounds (e.g., providing (i) cover (e.g., plastic sheeting or temporary roofs) to prevent contact with stormwater; (ii) collection and proper disposal in a manner to prevent contact with stormwater; and (iii) a similarly effective means designed to prevent discharge of these pollutants); (4) Minimize the discharge of pollutants from vehicle and equipment washing, wheel wash water, and other types of washing (e.g., locating activities away from surface waters and stormwater inlets or conveyance and directing wash waters to sediment basins or traps, using filtration devices such as filter bags or sand filters, or using similarly effective controls); (5) Direct concrete wash water into a leak -proof container or leak -proof settling basin. The container or basin shall be designed so that no overflows can occur due to inadequate sizing or precipitation. Hardened concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wastes. Liquid concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wash waters and shall not be discharged to surface waters; (6) Minimize the discharge of pollutants from storage, handling, and disposal of construction products, materials, and wastes including (i) building products such as asphalt sealants, copper flashing, roofing materials, adhesives, and concrete admixtures; (ii) pesticides, herbicides, insecticides, fertilizers, and landscape Page 10 of 26 materials; and (iii) construction and domestic wastes such as packaging materials, scrap construction materials, masonry products, timber, pipe and electrical cuttings, plastics, Styrofoam, concrete, and other trash or building materials; (7) Prevent the discharge of fuels, oils, and other petroleum products, hazardous or toxic wastes, waste concrete, and sanitary wastes; (8) Address any other discharge from the potential pollutant -generating activities not addressed above; (9) Minimize the exposure of waste materials to precipitation by closing or covering waste containers during precipitation events and at the end of the business day, or implementing other similarly effective practices. Minimization of exposure is not required in cases where the exposure to precipitation will not result in a discharge of pollutants; and f. Describe procedures for providing pollution prevention awareness of all applicable wastes, including any wash water, disposal practices, and applicable disposal locations of such wastes, to personnel in order to comply with the conditions of this general permit. The operator shall implement the procedures described in the SWPPP. 5. SWPPP requirements for discharges to nutrient and sediment impaired waters. For discharges to surface waters (i) identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or (ii) with an applicable TMDL wasteload allocation established and approved prior to the term of this general permit for sediment for a sediment - related parameter (i.e., total suspended solids or turbidity) or nutrients (i.e., nitrogen or phosphorus), the operator shall: a. Identify the impaired waters, approved TMDLs, and pollutants of concern in the SWPPP; and b. Provide clear direction in the SWPPP that: (1) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; (2) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and (3) A modified inspection schedule shall be implemented in accordance with Part II G 2 a. 6. SWPPP requirements for discharges to polychlorinated biphenyl (PCB) impaired waters. For discharges from construction activities that include the demolition of any structure with at least 10,000 square feet of floor space built or renovated before January 1, 1980, to surface waters (i) identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or (ii) with an applicable TMDL wasteload allocation established and approved prior to the term of this general permit for PCB, the operator shall: Page 11 of 26 a. Identify the impaired waters, approved TMDLs, and pollutant of concern in the SWPPP; b. Implement the approved erosion and sediment control plan in accordance with Part II B 2; c. Dispose of waste materials in compliance with applicable state, federal, and local requirements; and d. Implement a modified inspection schedule in accordance with Part II G 2 a. 7. SWPPP requirements for discharges to exceptional waters. For discharges to surface waters identified in 9VAC25-260-30 A 3 c as an exceptional water, the operator shall: a. Identify the exceptional surface waters in the SWPPP; and b. Provide clear direction in the SWPPP that: (1) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; (2) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and (3) A modified inspection schedule shall be implemented in accordance with Part II G 2 a. 8. Identification of qualified personnel. The name, phone number, and qualifications of the qualified personnel conducting inspections required by this general permit. 9. Delegation of authority. The individuals or positions with delegated authority, in accordance with Part III K, to sign inspection reports or modify the SWPPP. 10. SWPPP signature. The SWPPP shall be signed and dated in accordance with Part III K. C. SWPPP amendments, modification, and updates. 1. The operator shall amend the SWPPP whenever there is a change in the design, construction, operation, or maintenance that has a significant effect on the discharge of pollutants to surface waters and that has not been previously addressed in the SWPPP. 2. The SWPPP shall be amended if, during inspections or investigations by the operator's qualified personnel, or by local, state, or federal officials, it is determined that the existing control measures are ineffective in minimizing pollutants in discharges from the construction activity. Revisions to the SWPPP shall include additional or modified control measures designed and implemented to correct problems identified. If approval by the VESCP authority, VSMP authority, or department is necessary for the control measure, revisions to the SWPPP shall be completed no later than seven calendar days following approval. Implementation of these additional or modified control measures shall be accomplished as described in Part II H. Page 12 of 26 3. The SWPPP shall clearly identify the contractors that will implement and maintain each control measure identified in the SWPPP. The SWPPP shall be amended to identify any new contractor that will implement and maintain a control measure. 4. The operator shall update the SWPPP as soon as possible but no later than seven days following any modification to its implementation. All modifications or updates to the SWPPP shall be noted and shall include the following items: a. A record of dates when: (1) Major grading activities occur; (2) Construction activities temporarily or permanently cease on a portion of the site; and (3) Stabilization measures are initiated; b. Documentation of replaced or modified controls where periodic inspections or other information have indicated that the controls have been used inappropriately or incorrectly and were modified; c. Areas that have reached final stabilization and where no further SWPPP or inspection requirements apply; d. All properties that are no longer under the legal control of the operator and the dates on which the operator no longer had legal control over each property; e. The date of any prohibited discharges, the discharge volume released, and what actions were taken to minimize the impact of the release; f. Measures taken to prevent the reoccurrence of any prohibited discharge; and g. Measures taken to address any evidence identified as a result of an inspection required under Part II G. 5. Amendments, modifications, or updates to the SWPPP shall be signed in accordance with Part III K. D. Public notification. Upon commencement of land disturbance, the operator shall post conspicuously a copy of the notice of coverage letter near the main entrance of the construction activity. For linear projects, the operator shall post the notice of coverage letter at a publicly accessible location near an active part of the construction project (e.g., where a pipeline crosses a public road). The operator shall maintain the posted information until termination of general permit coverage as specified in Part I F. E. SWPPP availability. 1. Operators with day-to-day operational control over SWPPP implementation shall have a copy of the SWPPP available at a central location on -site for use by those identified as having responsibilities under the SWPPP whenever they are on the construction site. Page 13 of 26 2. The operator shall make the SWPPP and all amendments, modifications, and updates available upon request to the department, the VSMP authority, the EPA, the VESCP authority, local government officials, or the operator of a municipal separate storm sewer system receiving discharges from the construction activity. If an on -site location is unavailable to store the SWPPP when no personnel are present, notice of the SWPPP's location shall be posted near the main entrance of the construction site. 3. The operator shall make the SWPPP available for public review in an electronic format or in hard copy. Information for public access to the SWPPP shall be posted and maintained in accordance with Part II D. If not provided electronically, public access to the SWPPP may be arranged upon request at a time and at a publicly accessible location convenient to the operator or his designee but shall be no less than once per month and shall be during normal business hours. Information not required to be contained within the SWPPP by this general permit is not required to be released. F. SWPPP implementation. The operator shall implement the SWPPP and subsequent amendments, modifications, and updates from commencement of land disturbance until termination of general permit coverage as specified in Part I F. All control measures shall be properly maintained in effective operating condition in accordance with good engineering practices and, where applicable, manufacturer specifications. If a site inspection required by Part II G identifies a control measure that is not operating effectively, corrective actions shall be completed as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority, to maintain the continued effectiveness of the control measures. 2. If site inspections required by Part II G identify an existing control measure that needs to be modified or if an additional or alternative control measure is necessary for any reason, implementation shall be completed prior to the next anticipated measurable storm event. If implementation prior to the next anticipated measurable storm event is impracticable, then additional or alternative control measures shall be implemented as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority. G. SWPPP Inspections. 1. Personnel responsible for on -site and off -site inspections. Inspections required by this general permit shall be conducted by the qualified personnel identified by the operator in the SWPPP. The operator is responsible for ensuring that the qualified personnel conduct the inspection. 2. Inspection schedule. a. For construction activities that discharge to a surface water identified in Part II B 5 and B 6 as impaired or having an approved TMDL or Part I B 7 as exceptional, the following inspection schedule requirements apply: (1) Inspections shall be conducted at a frequency of (i) at least once every four business days or (ii) at least once every five business days and no later than 24 hours following a measurable storm event. In the event that a measurable storm event occurs when Page 14 of 26 there are more than 24 hours between business days, the inspection shall be conducted on the next business day; and (2) Representative inspections as authorized in Part II G 2 d shall not be allowed. b. Except as specified in Part II G 2 a, inspections shall be conducted at a frequency of: (1) At least once every five business days; or (2) At least once every 10 business days and no later than 24 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 24 hours between business days, the inspection shall be conducted on the next business day. c. Where areas have been temporarily stabilized or land -disturbing activities will be suspended due to continuous frozen ground conditions and stormwater discharges are unlikely, the inspection frequency described in Part II G 2 a and 2 b may be reduced to once per month. If weather conditions (such as above freezing temperatures or rain or snow events) make discharges likely, the operator shall immediately resume the regular inspection frequency. d. Except as prohibited in Part II G 2 a (2), representative inspections may be utilized for utility line installation, pipeline construction, or other similar linear construction activities provided that: (1) Temporary or permanent soil stabilization has been installed and vehicle access may compromise the temporary or permanent soil stabilization and potentially cause additional land disturbance increasing the potential for erosion; (2) Inspections occur on the same frequency as other construction activities; (3) Control measures are inspected along the construction site 0.25 miles above and below each access point (i.e., where a roadway, undisturbed right-of-way, or other similar feature intersects the construction activity and access does not compromise temporary or permanent soil stabilization); and (4) Inspection locations are provided in the inspection report required by Part II G. e. If adverse weather causes the safety of the inspection personnel to be in jeopardy, the inspection may be delayed until the next business day on which it is safe to perform the inspection. Any time inspections are delayed due to adverse weather conditions, evidence of the adverse weather conditions shall be included in the SWPPP with the dates of occurrence. 3. Inspection requirements. a. As part of the inspection, the qualified personnel shall: (1) Record the date and time of the inspection and, when applicable, the date and rainfall amount of the last measurable storm event; Page 15 of 26 (2) Record the information and a description of any discharges occurring at the time of the inspection or evidence of discharges occurring prior to the inspection; (3) Record any land -disturbing activities that have occurred outside of the approved erosion and sediment control plan; (4) Inspect the following for installation in accordance with the approved erosion and sediment control plan, identification of any maintenance needs, and evaluation of effectiveness in minimizing sediment discharge, including whether the control has been inappropriately or incorrectly used: (a) All perimeter erosion and sediment controls, such as silt fence; (b) Soil stockpiles, when applicable, and borrow areas for stabilization or sediment trapping measures; (c) Completed earthen structures, such as dams, dikes, ditches, and diversions for stabilization and effective impoundment or flow control; (d) Cut and fill slopes; (e) Sediment basins and traps, sediment barriers, and other measures installed to control sediment discharge from stormwater; (f) Temporary or permanent channels, flumes, or other slope drain structures installed to convey concentrated runoff down cut and fill slopes; (g) Storm inlets that have been made operational to ensure that sediment laden stormwater does not enter without first being filtered or similarly treated; and (h) Construction vehicle access routes that intersect or access paved or public roads for minimizing sediment tracking; (5) Inspect areas that have reached final grade or that will remain dormant for more than 14 days to ensure: (a) Initiation of stabilization activities have occurred immediately, as defined in 9VAC25-880-1; and (b) Stabilization activities have been completed within seven days of reaching grade or stopping work; (6) Inspect for evidence that the approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department -approved annual standards and specifications has not been properly implemented. This includes: Page 16 of 26 (a) Concentrated flows of stormwater in conveyances such as rills, rivulets, or channels that have not been filtered, settled, or similarly treated prior to discharge, or evidence thereof; (b) Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove sediments prior to discharge; (c) Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that discharge to surface waters. Inlets and catch basins with failing sediment controls due to improper installation, lack of maintenance, or inadequate design are considered unprotected; (d) Sediment deposition on any property (including public and private streets) outside of the construction activity covered by this general permit; (e) Required stabilization has not been initiated or completed or is not effective on portions of the site; (f) Sediment basins without adequate wet or dry storage volume or sediment basins that allow the discharge of stormwater from below the surface of the wet storage portion of the basin; (g) Sediment traps without adequate wet or dry storage or sediment traps that allow the discharge of stormwater from below the surface of the wet storage portion of the trap; and (h) Land disturbance or sediment deposition outside of the approved area to be disturbed; (7) Inspect pollutant generating activities identified in the pollution prevention plan for the proper implementation, maintenance, and effectiveness of the procedures and practices; (8) Identify any pollutant generating activities not identified in the pollution prevention plan; and (9) Identify and document the presence of any evidence of the discharge of pollutants prohibited by this general permit. 4. Inspection report. Each inspection report shall include the following items: a. The date and time of the inspection and, when applicable, the date and rainfall amount of the last measurable storm event; b. Summarized findings of the inspection; c. The locations of prohibited discharges; d. The locations of control measures that require maintenance; Page 17 of 26 e. The locations of control measures that failed to operate as designed or proved inadequate or inappropriate for a particular location; f. The locations where any evidence identified under Part II G 3 a (6) exists; g. The locations where any additional control measure is needed; h. A list of corrective actions required (including any changes to the SWPPP that are necessary) as a result of the inspection or to maintain permit compliance; Documentation of any corrective actions required from a previous inspection that have not been implemented; and The date and signature of the qualified personnel and the operator or its duly authorized representative. 5. The inspection report shall be included into the SWPPP no later than four business days after the inspection is complete. 6. The inspection report and any actions taken in accordance with Part II shall be retained by the operator as part of the SWPPP for at least three years from the date that general permit coverage expires or is terminated. The inspection report shall identify any incidents of noncompliance. Where an inspection report does not identify any incidents of noncompliance, the report shall contain a certification that the construction activity is in compliance with the SWPPP and this general permit. The report shall be signed in accordance with Part III K of this general permit. H. Corrective actions. The operator shall implement the corrective actions identified as a result of an inspection as soon as practicable but no later than seven days after discovery or a longer period as approved by the VSMP authority. If approval of a corrective action by a regulatory authority (e.g., VSMP authority, VESCP authority, or the department) is necessary, additional control measures shall be implemented to minimize pollutants in stormwater discharges until such approvals can be obtained. 2. The operator may be required to remove accumulated sediment deposits located outside of the construction activity covered by this general permit as soon as practicable in order to minimize environmental impacts. The operator shall notify the VSMP authority and the department as well as obtain all applicable federal, state, and local authorizations, approvals, and permits prior to the removal of sediments accumulated in surface waters including wetlands. Page 18 of 26 PART III CONDITIONS APPLICABLE TO ALL VPDES PERMITS NOTE: Discharge monitoring is not required for this general permit. If the operator chooses to monitor stormwater discharges or control measures, the operator shall comply with the requirements of subsections A, B, and C, as appropriate. A. Monitoring. 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 (1VAC30-45 or 1VAC30-46). 3. The operator shall periodically calibrate and perform maintenance procedures on all monitoring and analytical instrumentation at intervals that will ensure accuracy of measurements. B. Records. 1. Monitoring records and reports shall include: a. The date, exact place, and time of sampling or measurements; b. The individuals who performed the sampling or measurements; c. The dates and times analyses were performed; d. The individuals who performed the analyses; e. The analytical techniques or methods used; and f. The results of such analyses. 2. The operator shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this general permit, and records of all data used to complete the registration statement for this general permit, for a period of at least three years from the date of the sample, measurement, report or request for coverage. This period of retention shall be extended automatically during the course of any unresolved litigation regarding the regulated activity or regarding control standards applicable to the operator, or as requested by the board. C. Reporting monitoring results. Page 19 of 26 1. The operator shall update the SWPPP to include the results of the monitoring as may be performed in accordance with this general permit, unless another reporting schedule is specified elsewhere in this general permit. 2. Monitoring results shall be reported on a discharge monitoring report (DMR); on forms provided, approved or specified by the department; or in any format provided that the date, location, parameter, method, and result of the monitoring activity are included. 3. If the operator monitors any pollutant specifically addressed by this general permit more frequently than required by this general permit using test procedures approved under 40 CFR Part 136 or using other test procedures approved by the U.S. Environmental Protection Agency or using procedures specified in this general permit, the results of this monitoring shall be included in the calculation and reporting of the data submitted in the DMR or reporting form specified by the department. 4. Calculations for all limitations which require averaging of measurements shall utilize an arithmetic mean unless otherwise specified in this general permit. D. Duty to provide information. The operator shall furnish, within a reasonable time, any information which the board may request to determine whether cause exists for terminating this general permit coverage or to determine compliance with this general permit. The board, department, EPA, or VSMP authority may require the operator to furnish, upon request, such plans, specifications, and other pertinent information as may be necessary to determine the effect of the wastes from his discharge on the quality of surface waters, or such other information as may be necessary to accomplish the purposes of the CWA and the Virginia Stormwater Management Act. The operator shall also furnish to the board, department, EPA, or VSMP authority, upon request, copies of records required to be kept by this general permit. E. Compliance schedule reports. Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule of this general permit shall be submitted no later than 14 days following each schedule date. F. Unauthorized stormwater discharges. Pursuant to § 62.1-44.5 of the Code of Virginia, except in compliance with a state permit issued by the department, it shall be unlawful to cause a stormwater discharge from a construction activity. G. Reports of unauthorized discharges. Any operator who discharges or causes or allows a discharge of sewage, industrial waste, other wastes or any noxious or deleterious substance or a hazardous substance or oil in an amount equal to or in excess of a reportable quantity established under either 40 CFR Part 110, 40 CFR Part 117, 40 CFR Part 302, or § 62.1-44.34:19 of the Code of Virginia that occurs during a 24-hour period into or upon surface waters or who discharges or causes or allows a discharge that may reasonably be expected to enter surface waters, shall notify the Department of Environmental Quality of the discharge immediately upon discovery of the discharge, but in no case later than within 24 hours after said discovery. A written report of the unauthorized discharge shall be submitted to the department and the VSMP authority within five days of discovery of the discharge. The written report shall contain: 1. A description of the nature and location of the discharge; 2. The cause of the discharge; Page 20 of 26 3. The date on which the discharge occurred; 4. The length of time that the discharge continued; 5. The volume of the discharge; 6. If the discharge is continuing, how long it is expected to continue; 7. If the discharge is continuing, what the expected total volume of the discharge will be; and 8. Any steps planned or taken to reduce, eliminate and prevent a recurrence of the present discharge or any future discharges not authorized by this general permit. Discharges reportable to the department and the VSMP authority under the immediate reporting requirements of other regulations are exempted from this requirement. H. Reports of unusual or extraordinary discharges. If any unusual or extraordinary discharge including a "bypass" or "upset," as defined in this general permit, should occur from a facility and the discharge enters or could be expected to enter surface waters, the operator shall promptly notify, in no case later than within 24 hours, the department and the VSMP authority by telephone after the discovery of the discharge. This notification shall provide all available details of the incident, including any adverse effects on aquatic life and the known number of fish killed. The operator shall reduce the report to writing and shall submit it to the department and the VSMP authority within five days of discovery of the discharge in accordance with Part III 1 2. Unusual and extraordinary discharges include any discharge resulting from: 1. Unusual spillage of materials resulting directly or indirectly from processing operations; 2. Breakdown of processing or accessory equipment; 3. Failure or taking out of service of some or all of the facilities; and 4. Flooding or other acts of nature. I. Reports of noncompliance. The operator shall report any noncompliance which may adversely affect surface waters or may endanger public health. 1. An oral report to the department and the VSMP authority shall be provided within 24 hours from the time the operator becomes aware of the circumstances. The following shall be included as information that shall be reported within 24 hours under this subdivision: a. Any unanticipated bypass; and b. Any upset that causes a discharge to surface waters. 2. A written report shall be submitted within five days and shall contain: a. A description of the noncompliance and its cause; Page 21 of 26 b. The period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and c. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. The department may waive the written report on a case -by -case basis for reports of noncompliance under Part III I if the oral report has been received within 24 hours and no adverse impact on surface waters has been reported. 3. The operator shall report all instances of noncompliance not reported under Part II I 1 1 or 2 in writing as part of the SWPPP. The reports shall contain the information listed in Part 111 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. 4. Where the operator becomes aware of a failure to submit any relevant facts, or submittal of incorrect information in any report, including a registration statement, to the department or the VSMP authority, the operator shall promptly submit such facts or correct information. J. Notice of planned changes. 1. The operator shall give notice to the department and the VSMP authority as soon as possible of any planned physical alterations or additions to the permitted facility or activity. Notice is required only when: a. The operator plans an alteration or addition to any building, structure, facility, or installation that may meet one of the criteria for determining whether a facility is a new source in 9VAC25-870-420; b. The operator plans an alteration or addition that would significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants that are not subject to effluent limitations in this general permit; or 2. The operator shall give advance notice to the department and VSMP authority of any planned changes in the permitted facility or activity, which may result in noncompliance with state permit requirements. K. Signatory requirements. 1. Registration statement. All registration statements shall be signed as follows: a. For a corporation: by a responsible corporate officer. For the purpose of this chapter, a responsible corporate officer means: (i) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy -making or decision -making functions for the corporation; or (ii) the manager of one or more manufacturing, production, or operating facilities, provided the Page 22 of 26 manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for state permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures; b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or c. For a municipality, state, federal, or other public agency: by either a principal executive officer or ranking elected official. For purposes of this chapter, a principal executive officer of a public agency includes (i) the chief executive officer of the agency or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency. 2. Reports and other information. All reports required by this general permit, including SWPPPs, and other information requested by the board or the department shall be signed by a person described in Part III K 1 or by a duly authorized representative of that person. A person is a duly authorized representative only if: a. The authorization is made in writing by a person described in Part III K 1; b. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the operator. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and c. The signed and dated written authorization is included in the SWPPP. A copy shall be provided to the department and VSMP authority, if requested. 3. Changes to authorization. If an authorization under Part III K 2 is no longer accurate because a different individual or position has responsibility for the overall operation of the construction activity, a new authorization satisfying the requirements of Part III K 2 shall be submitted to the VSMP authority as the administering entity for the board prior to or together with any reports or information to be signed by an authorized representative. 4. Certification. Any person signing a document under Part III K 1 or 2 shall make the following certification: 5. "1 certify under penalty of law that I have read and understand this document and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant Page 23 of 26 penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." L. Duty to comply. The operator shall comply with all conditions of this general permit. Any state permit noncompliance constitutes a violation of the Virginia Stormwater Management Act and the Clean Water Act, except that noncompliance with certain provisions of this general permit may constitute a violation of the Virginia Stormwater Management Act but not the Clean Water Act. Permit noncompliance is grounds for enforcement action; for state permit coverage, termination, revocation and reissuance, or modification; or denial of a state permit renewal application. The operator shall comply with effluent standards or prohibitions established under § 307(a) of the Clean Water Act for toxic pollutants within the time provided in the regulations that establish these standards or prohibitions or standards for sewage sludge use or disposal, even if this general permit has not yet been modified to incorporate the requirement. M. Duty to reapply. If the operator wishes to continue an activity regulated by this general permit after the expiration date of this general permit, the operator shall submit a new registration statement at least 60 days before the expiration date of the existing general permit, unless permission for a later date has been granted by the board. The board shall not grant permission for registration statements to be submitted later than the expiration date of the existing general permit. N. Effect of a state permit. This general permit does not convey any property rights in either real or personal property or any exclusive privileges, nor does it authorize any injury to private property or invasion of personal rights, or any infringement of federal, state or local law or regulations. O. State law. Nothing in this general permit shall be construed to preclude the institution of any legal action under, or relieve the operator from any responsibilities, liabilities, or penalties established pursuant to any other state law or regulation or under authority preserved by § 510 of the Clean Water Act. Except as provided in general permit conditions on "bypassing" (Part III U) and "upset" (Part III V), nothing in this general permit shall be construed to relieve the operator from civil and criminal penalties for noncompliance. P. Oil and hazardous substance liability. Nothing in this general permit shall be construed to preclude the institution of any legal action or relieve the operator from any responsibilities, liabilities, or penalties to which the operator is or may be subject under §§ 62.1-44.34:14 through 62.1-44.34:23 of the State Water Control Law or § 311 of the Clean Water Act. Q. Proper operation and maintenance. The operator shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances), which are installed or used by the operator to achieve compliance with the conditions of this general permit. Proper operation and maintenance also includes effective plant performance, adequate funding, adequate staffing, and adequate laboratory and process controls, including appropriate quality assurance procedures. This provision requires the operation of back-up or auxiliary facilities or similar systems, which are installed by the operator only when the operation is necessary to achieve compliance with the conditions of this general permit. R. Disposal of solids or sludges. Solids, sludges or other pollutants removed in the course of treatment or management of pollutants shall be disposed of in a manner so as to prevent any pollutant from such materials from entering surface waters and in compliance with all applicable state and federal laws and regulations. Page 24 of 26 S. Duty to mitigate. The operator shall take all steps to minimize or prevent any discharge in violation of this general permit that has a reasonable likelihood of adversely affecting human health or the environment. T. Need to halt or reduce activity not a defense. It shall not be a defense for an operator in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this general permit. U. Bypass. 1. "Bypass," as defined in 9VAC25-870-10, means the intentional diversion of waste streams from any portion of a treatment facility. The operator may allow any bypass to occur that does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to ensure efficient operation. These bypasses are not subject to the provisions of Part I II U 2 and 3. 2. Notice. a. Anticipated bypass. If the operator knows in advance of the need for a bypass, the operator shall submit prior notice to the department, if possible at least 10 days before the date of the bypass. b. Unanticipated bypass. The operator shall submit notice of an unanticipated bypass as required in Part III I. 3. Prohibition of bypass. a. Except as provided in Part III U 1, bypass is prohibited, and the board or department may take enforcement action against an operator for bypass unless: (1) Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage. Severe property damage means substantial physical damage to property, damage to the treatment facilities that causes them to become inoperable, or substantial and permanent loss of natural resources that can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production; (2) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass that occurred during normal periods of equipment downtime or preventive maintenance; and (3) The operator submitted notices as required under Part III U 2. b. The department may approve an anticipated bypass, after considering its adverse effects, if the department determines that it will meet the three conditions listed in Part III U 3 a. Page 25 of 26 V. Upset. 1. An "upset," as defined in 9VAC25-870-10, means an exceptional incident in which there is unintentional and temporary noncompliance with technology -based state permit effluent limitations because of factors beyond the reasonable control of the operator. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation. 2. An upset constitutes an affirmative defense to an action brought for noncompliance with technology -based state permit effluent limitations if the requirements of Part III V 4 are met. A determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance, is not a final administrative action subject to judicial review. 3. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation. 4. An operator who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs or other relevant evidence that: a. An upset occurred and that the operator can identify the cause of the upset; b. The permitted facility was at the time being properly operated; c. The operator submitted notice of the upset as required in Part III I; and d. The operator complied with any remedial measures required under Part III S. 5. In any enforcement proceeding, the operator seeking to establish the occurrence of an upset has the burden of proof. W. Inspection and entry. The operator shall allow the department as the board's designee, the VSMP authority, EPA, or an authorized representative of either entity (including an authorized contractor), upon presentation of credentials and other documents as may be required by law to: 1. Enter upon the operator's premises where a regulated facility or activity is located or conducted, or where records shall be kept under the conditions of this general permit; 2. Have access to and copy, at reasonable times, any records that shall be kept under the conditions of this general permit; 3. Inspect and photograph at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this general permit; and 4. Sample or monitor at reasonable times, for the purposes of ensuring state permit compliance or as otherwise authorized by the Clean Water Act or the Virginia Stormwater Management Act, any substances or parameters at any location. Page 26 of 26 For purposes of this section, the time for inspection shall be deemed reasonable during regular business hours, and whenever the facility is discharging. Nothing contained herein shall make an inspection unreasonable during an emergency. X. State permit actions. State permit coverage may be modified, revoked and reissued, or terminated for cause. The filing of a request by the operator for a state permit modification, revocation and reissuance, or termination, or a notification of planned changes or anticipated noncompliance does not stay any state permit condition. Y. Transfer of state permit coverage. 1. State permits are not transferable to any person except after notice to the department. Except as provided in Part III Y 2, a state permit may be transferred by the operator to a new operator only if the state permit has been modified or revoked and reissued, or a minor modification made, to identify the new operator and incorporate such other requirements as may be necessary under the Virginia Stormwater Management Act and the Clean Water Act. 2. As an alternative to transfers under Part III Y 1, this state permit may be automatically transferred to a new operator if: a. The current operator notifies the department at least 30 days in advance of the proposed transfer of the title to the facility or property; b. The notice includes a written agreement between the existing and new operators containing a specific date for transfer of state permit responsibility, coverage, and liability between them; and c. The department does not notify the existing operator and the proposed new operator of its intent to modify or revoke and reissue the state permit. If this notice is not received, the transfer is effective on the date specified in the agreement mentioned in Part III Y 2 b. 3. For ongoing construction activity involving a change of operator, the new operator shall accept and maintain the existing SWPPP, or prepare and implement a new SWPPP prior to taking over operations at the site. Z. Severability. The provisions of this general permit are severable, and if any provision of this general permit or the application of any provision of this state permit to any circumstance, is held invalid, the application of such provision to other circumstances and the remainder of this general permit shall not be affected thereby. Section 12. Inspection logs Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Eco Villaqe 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 Eco Village 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