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WPO201600060 Calculations WPO VSMP 2016-09-30
COUNTY OF ALBEMARLE Department of Community Development J®���., 401 McIntire Road,North Wing Charlottesville,Virginia 22902-4596 Tel.(434)296-5832 • Fax(434)972-4126 (This document is to be made publicly available according to 9VAC25-880-70, Part II, section D) Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At: Region Ten 502 Old Lynchburg Road Charlottesville, VA 22903 Prepared by: Waterstreet Studio, LLC Prepared for: Region Ten Community Services Board, Inc. 24 Hour Emergency Contact: Kathy Willams Fiscal Director Region Ten Community Services Board (434) 972-1816 (434) 270-4268 September 30,2016 S as. Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County CONTENTS: (from Albemarle County Code Sec. 17-405) " 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 t 9. Signed Certification / 10. Delegation of authority. 11. General permit copy 12. Inspection logs ' Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 1. Registration statement (Provide a signed completed copy of the DEQ registration statement) r.. mor or mai Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Registration Statement General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10) (Please Type or Print All Information) 1. Construction Activity Operator: (General permit coverage will be issued to this operator The Certification in Item #12 must be wassigned by the appropriate person associated with this operator) Name Region Ten Community Services Board,Inc. Contact:Kathy Williams Mailing Address:502 Old Lynchburg Road City.Charlottesville State.VA Zip 22903 Phone:(434)972-1816 Email address(if available):KATHY.WILLIAMS@regionten.org Indicate if DEQ may transmit general permit correspondence electronically' Yes 0 No❑ 2. Existing General Permit Registration Number(for renewals only): 3. Name and Location of the Construction Activity: Name Region Ten Women's Shelter Address(if available):502 Old Lynchburg Road City.Charlottesville State.VA Zip 22902 County(if not located within a City).Albemarle County Latitude(decimal degrees):38-00-30 Longitude(decimal degrees):78-31-12 Name and Location of all Off-site Support Activities to be covered under the general permit: e Name. Address(if available): City- State Zip County(if not located within a City): Latitude(decimal degrees): Longitude(decimal degrees): 4. Status of the Construction Activity(check only one): Federal ❑ State❑ Public❑ Private❑■ 5. Nature of the Construction Activity(e.g.,commercial,industrial,residential,agricultural,oil and gas,etc.): Commercial/Institutional 6. Name of the Receiving Water(s)and Hydrologic Unit Code(HUC): *WM Moore's Creek Name. Name: HUC..1R15 HUC. 7. If the discharge is through a Municipal Separate Storm Sewer System(MS4),the name of the MS4 operator: Albemarle County 8. Estimated Project Start and Completion Date: Start Date(mm/dd/yyyy):03/01/2017 Completion Date(mm/dd/yyyy):01/01/2017 9. Total Land Area of Development(to the nearest one-hundredth acre):8.38 Estimated Area to be Disturbed(to the nearest one-hundredth acre):1.10 10. Is the area to be disturbed part of a larger common plan of development or sale? Yes ■❑ No❑ 11. 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 this Registration Statement By signing this Registration Statement the operator is certifying that the SWPPP has been prepared. 12. Certification: "I certify under penalty of law that I have read and understand this Registration Statement and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for submitting false information including the possibility of fine and imprisonment for knowing violations." ft°Ctix t}f Printed Name -1141\i 10 Ili rr15 Title.AvKin5'Mt-fivt Sc rviCCS ,,. Signature Date. 9 17-Cl 1 1 la (Please sign in INK. This edification must be signed by the appropriate person associated with the operator identified in Item#1.) tiro 07/2014 Page 1 of 1 Instructions for Completing the Registration Statement SWGeneral VPDES Permit for Discharges of Stormwater from Construction Activities (VAR1O) GENERAL The entities that are considered operators will commonly consist of the owner or developer of a project(the party with control of project plans A.Coverage Under this General Permit. and specifications)or the general contractor(the party with day to day 111111 operational control of the activities at the project site which are Any operator applying for coverage under this general permit who is necessary to ensure compliance with the general permit). required to submit a Registration Statement (see Section B below) must submit a complete Registration Statement to the Department. Provide the legal name(do not use a colloquial name),contact,mailing me The Registration Statement serves as a Notice of Intent for coverage address, telephone number, and email address (if available) of the under the General VPDES Permit for Discharges of Stormwater from construction activity operator;general permit coverage will be issued to Construction Activities(VAR10). this operator Indicate if the Department may transmit general permit correspondence electronically B.Single-family Detached Residential Structures. "" Item 2:Existing General Permit Registration Number. Operators with an existing stormwater discharge or proposing a new stormwater discharge associated with the construction of a single- For reapplications only,provide the existing general permit registration family detached residential structure are not required to submit a number for the construction activity This item does not need to be .w Registration Statement or the Department of Environmental Quality completed for new construction activities applying for general permit (DEQ)portion of the general permit fee. coverage. Operators of these types of discharges are authorized to discharge Item 3: Name and Location of the Construction Activity under this general permit immediately upon the general permit's Information. ow effective date of July 1,2014 Provide the official name,street address(if available),city or county(if C.To Apply for Permit Coverage. not located within a City)of the construction activity Also,provide the latitude and longitude in decimal degrees of the approximate center of 1. New Construction Activities. Any operator proposing a new the construction activity(e.g.,N 37.5000,W 77.5000). 'P' stormwater discharge from construction activities shall submit a complete Registration Statement to the Department prior to the Name and Location of Off-site Support Activity Information. commencement of land disturbance, unless exempted by Section B above. Any operator proposing a new stormwater discharge from This general permit also authorizes stormwater discharges from ..m, construction activities in response to a public emergency where the support activities (e.g., concrete or asphalt batch plants, equipment related work requires immediate authorization to avoid imminent staging yards, material storage areas, excavated material disposal endangerment to human health or the environment is immediately areas, borrow areas) located on-site or off-site provided that (i) the authorized to discharge under this general permit and must submit a support activity is directly related to a construction activity that is complete Registration Statement to the Department no later than 30 required to have general permit coverage;(ii)the support activity is not — days after commencing land disturbance; documentation to a commercial operation, nor does it serve multiple unrelated substantiate the occurrence of the public emergency must construction activities by different operators, (iii) the support activity accompany the Registration Statement. does not operate beyond the completion of the construction activity it supports, (iv) the support activity is identified in the registration ..r 2. Existing Construction Activities. Any operator that was statement at the time of general permit coverage; (v) appropriate authorized to discharge under the general permit issued in 2009, control measures are identified in a SWPPP and implemented to and who intends to continue coverage under this general permit, address the discharges from the support activity areas; and (vi) all shall submit a complete Registration Statement to the Department applicable state, federal, and local approvals are obtained for the on or before June 1,2014,unless exempted by Section B above. support activity n® D.Where to Submit Registration Statements. Provide the official name,street address(if available), City and County (if not located within a City) of all off-site support activities to be All Registration Statements should be submitted to: covered under this general permit. Also, provide the latitude and longitude in decimal degrees of the approximate center of the off-site as Department of Environmental Quality support activities (e.g., N 37.5000, W 77.5000). Also, if an off-site Office of Stormwater Management,10"'Floor support activity is going to be covered under this general permit the P.O.Box 1105 total land area of the off-site support activity and the estimated area to Richmond,VA 23218 be disturbed by the off-site support activity need to be included in Item ,r. #9 LINE-BY-LINE INSTRUCTIONS Item 4:Status of the Construction Activity. Item 1:Construction Activity Operator Information. Indicate the appropriate status (Federal, State, Public, or Private) of +■+ "Operator" means the owner or operator of any facility or activity the construction activity subject to the Stormwater Management Act and regulations. In the context of stormwater associated with a large or small construction Item 5:Nature of the Construction Activity. activity, operator means any person associated with a construction project that meets either of the following two criteria:(i)the person has Provide a brief description of the construction activity, such as m' direct operational control over construction plans and specifications, commercial, residential,agricultural, oil and gas,etc.This list is not all including the ability to make modifications to those plans and inclusive. specifications or (ii) the person has day-to-day operational control of those activities at a project that are necessary to ensure compliance Item 6:Receiving Waters(s)and HUC Information. ,O, with a stormwater pollution prevention plan for the site or other state permit or VSMP authority permit conditions(i.e.,they are authorized to Provide the name of the receiving water(s)and corresponding HUC for direct workers at a site to carry out activities required by the all stormwater discharges including any stormwater discharges from stormwater pollution prevention plan or comply with other permit off-site support activities to be covered under this general permit. conditions). Hydrologic Unit Code or HUC is a watershed unit established in the "" most recent version of Virginia's 6"'order national watershed boundary dataset. 07/2014 Page 1 of 2 assigned or delegated to the manager in accordance with Item 7:MS4 Information. corporate procedures. rr If stormwater is discharged through a municipal separate storm sewer b. For a partnership or sole proprietorship: by a general partner or system(MS4),provide the name of the MS4 operator The name of the the proprietor,respectively MS4 operator is generally the Town, City, County, Institute or Federal facility where the construction activity is located. c. For a municipality,state,federal,or other public agency-by either a principal executive officer or ranking elected official. For purposes Item 8: Construction Activity Start and Completion Date of this part,a principal executive officer of a public agency includes: Information. (i)The chief executive officer of the agency,or Provide the estimated start date (month/day/year) of the construction activity Provide the estimated completion date (month/day/year) of (ii)A senior executive officer having responsibility for the overall the construction activity operations of a principal geographic unit of the agency Item 9:Construction Activity Area Information. AIM Provide the total area (to the nearest one-hundredth acre) of the development (i.e.., the total acreage of the larger common plan of development or sale). Include the total acreage of any off-site support r. activity to be covered under this general permit. Provide the estimated area(to the nearest one-hundredth acre)to be disturbed by the construction activity Include the estimated area of land disturbance that will occur at any off-site support activity to be .r covered under this general permit. Item 10:Common Plan of Development or Sale Information. Indicate if the area to be disturbed by the construction activity is part of • a larger common plan of development or sale. Larger common plan of development or sale is defined as a contiguous area where separate and distinct construction may be taking place at different times on different schedules. Plan is broadly defined as any announcement or documentation, including a sign, public notice or hearing, sales pitch, advertisement, drawing, permit application, zoning request, etc., or physical demarcation such as boundary signs, lot stakes, or surveyor markings indicating that construction activities may occur • Item 11:Stormwater Pollution Prevention Plan(SWPPP). 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(VAR10)prior to submitting this Registration Statement. By signing this Registration Statement the operator is certifying that the SWPPP has been prepared. ,,,. Item 12:Certification. A properly authorized individual associated with the operator identified in Item 1 of the Registration Statement is responsible for certifying and signing the Registration Statement. Please sign the Registration • Statement in INK. State statutes provide for severe penalties for submitting false information on the Registration Statement. State regulations require ... that the Registration Statement be signed as follows: a. For a corporation: by a responsible corporate officer For the purpose of this part,a responsible corporate officer means. Nit (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,9 production, or operating facilities, provided the manager is authorized to make management decisions that govem the operation of the regulated facility including having the explicit or implicit duty of making major NUS capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations;the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been 07/2014 Page 2 of 2 Transfer of Ownership Agreement Form General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10) (Please Type or Print All Information) Instructions: This agreement form must be signed in INK by properly authorized individuals as specified in the General VPDES Permit for Stormwater Discharges from Construction Activities (VAR10), Part III K (Signatory Requirements). Please retain a copy of this agreement form for your records. W,, Mail the original agreement form to. Department of Environmental Quality Office of Stormwater Management, 10th Floor P.O. Box 1105 Richmond,VA 23218 General Permit Registration Number Date of Transfer(mm/dd/yyyy) Construction Activity Name* CURRENT CONSTRUCTION ACTIVITY OPERATOR: Name. • Contact: Mailing Address: City State: Zip: Phone* Email Address(if available). "I (We) hereby agree to the transfer of ownership modification to the referenced General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR1 0)." ▪ Printed Name' Title Signature Date. • NEW CONSTRUCTION ACTIVITY OPERATOR: Name. Contact: Mailing Address. City: State Zip Phone: Email Address (if available) Indicate if DEQ may transmit general permit correspondence electronically Yes ❑ No ❑ I (We) hereby agree to the change of ownership modification to the referenced General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10), and agree to accept all responsibility, coverage, and liability of the general permit." ,.. Printed Name: Title: Signature. Date 01/2014 Page 1 of 1 Section 2. Notice of general permit coverage (This notice is to be posted near the main entrance according to 9VAC25-880-70, Part II, section C.) (Provide a copy of the DEQ coverage letter when obtained) r Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County MOO • Section 3. Nature of activity The purpose of this project is construct a 7,990 square foot building and small,supporting parking lot on an undeveloped portion of the existing Region Ten facility/property on Old Lynchburg Road in Albemarle County just outside the City of Charlottesville. �,. The property is already the home to the central office building of Region Ten which is an approximately 12,000 square foot building with a large supporting parking lot. This project site is an approximately 1 acre portion of the property at the corner of Old Lynchburg Road and Old Lynchburg Place. The project site is primarily wooded with flat terrain at the toe of 50'tall,25%slope up to the existing office building. The total property acreage is 8.38 acres but the project work limits are only 1.10 acres.Within the project limits,there will be an increase of 0.44 acres of impervious cover.To satisfy the VSMP stormwater management quantity and quality MIN requirements for the increased developed runoff,two bio-filters and a dry-swale are proposed as part of the project.The proposed BMPs will capture a majority of the new parking area runoff via roof drains,overland flow,and curb cuts with gravel filter aprons. The post-development stormwater discharge from the project site BMPs will be less than the 1 year,2 „- year, and 10 year 24-hour storm events as required by 9VAC25-870-66. The total phosphorous load removal requirement for the project is 0.43 lbs/year.As designed,the project stormwater management plan provides 0.58 lbs/year phosphorous removal,which is a surplus of 0.15 lbs/year. Construction will begin March 1,2017 and will conclude prior to January 1,2017. ▪ Sequence of Construction Stage'A' 1. Clearly mark limits of work. 2. Install construction entrance,construction access road,and inlet protection on existing drop inlet adjacent to construction entrance as shown on the plan.Utilize nearby fire hydrant for tire washing. 3. Install perimeter silt fencing and temporary diversion dike adjacent to construction entrance, and all other perimeter measures as shown on the plan. 4. Establish staging area and stockpile area as shown on plan. 5. Install extension of existing 54" concrete culvert pipe,proposed storm structures A3,A4,A5,and A6 as shown on the approved site plan,and re-route the existing drainage way to structure A6 as shown on the plans. Provide rip �• rap stabilization at the entrance to structure A6.Clear only the area required for installation of the 54"RCP.Also install storm drain system'C'. 6. Back fill 54"RCP,form Bio-Filter#1 basin shape and install inlet protection on newly installed storm drain structures.Do not install bio-filter components! 7. Clear remaining building pad area, install retaining wall adjacent to new 54"RCP,and begin filling building pad zone. 8. Install silt fence at top of retaining wall and spilt building pad runoff evenly to the front and rear silt fence. • 9. Complete building pad construction and begin building construction.Proceed to Stage B'of the E&SC plan. Stage'B' ▪ 10. Install remaining storm drain structures and piping and establish rough finish grades of front parking lot including Bio-filter#2 and Dry-swale shapes. Do not install bio-filter components! 11. Install inlet protection on all new storm structures. 12. Install all other site plan utilities. 13. As final grades are reached, install base gravel and curbing in areas to be paved and begin establishment of vegetation on all disturbed turf areas with permanent seeding or sodding,mulching, fertilization,and liming. Amend soils where needed.Consult with landscape architect before establishing vegetation. 14. Once remainder of site has been deemed stabilized by the county inspector and all construction activities are completed,restore staging and access areas to acceptable(pre-construction)conditions,install bio-filter media, gravel,underdrains,and plantings,and remove all other erosion control measures. Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 4. Erosion and Sediment Control Plan. (Provide a reduced, I 1 x17 copy of the latest Erosion and Sediment Controi Plan. Do not reference only.) 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Link Drainage Diagram for RegionlOWS Prepared by Microsoft, Printed 9/28/2016 HydroCAD©9 10 s/n 06424 ©2011 HydroCAD Software Solutions LLC MOS Pre-Development Runoff RegionlOWS Prepared by Microsoft Printed 9/28/2016 +�. HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 2 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 1 S 0.00 0.00 125.0 0.0500 0.013 54.0 0.0 0.0 Pre-Development Runoff Region 10WS Type II 24-hr ALB-01 YR Rainfall=3.00" Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment 1S: Pre-Dev Runoff = 0.20 cfs @ 12.13 hrs, Volume= 1,500 cf, Depth= 0.22" Runoff by SCS TR-20 method, UH=SCS, Time Span= 10.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-01 YR Rainfall=3.00" Area (ac) CN Description 0.240 61 >75% Grass cover, Good, HSG B 1.640 55 Woods, Good, HSG B 1.880 56 Weighted Average 1.880 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.4 152 0.2700 0.24 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.30" 2.8 166 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 0.1 125 0.0500 27.65 439.72 Pipe Channel, 54.0" Round Area= 15.9 sf Perim= 14.1' r= 1.13' n= 0.013 13.3 443 Total Subcatchment 1S: Pre-Dev - Hydrograph -- - 0.22i' - - -- -- _ - _ ❑Runoff 0.21 -I 0.20 cfs � - r T : ;, 0.2 : 0.19 j_ , ILType 11=2-4=firA'L$=;01YR 1 Rainfatl=3:00 0.18-- -= , T ' Runoff Area=1.880-ac- 0.15 0.14" . Runoff Volu me;1-,300 of-- 0.13" =1 r ti 0.12- ----_ ..-__ _ Runeff'Depth=0:21" 3 0.11 0., F-Iow- ength=4431- 0.08 ' L 1 : Tc=13,a m;in-- o.os Ji I : . 0.03 ;- 00.01 02-/ x:72,1 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) Pre-Development Runoff RegionlOWS Type 1124-hrALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 1S: Pre-Dev Runoff = 0.65 cfs @ 12.10 hrs, Volume= 2,841 cf, Depth= 0.42" Runoff by SCS TR-20 method, UH=SCS, Time Span= 10.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-02YR Rainfall=3.60" Area (ac) CN Description 0.240 61 >75% Grass cover, Good, HSG B 1.640 55 Woods, Good, HSG B 1.880 56 Weighted Average 1.880 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.4 152 0.2700 0.24 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.30" 2.8 166 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 0.1 125 0.0500 27.65 439.72 Pipe Channel, 54.0" Round Area= 15.9 sf Perim= 14.1' r= 1.13' n= 0.013 Ws 13.3 443 Total Subcatchment 1S: Pre-Dev aro Hydrograph 0 Runoff 0 7 r0.65 cfs NM 0.65 r, Type II 24-hr ALB 02YR_,/' Rainfall=3.60" 0.55 05 Ru Hoff Area=1.880 ac 0.45 Runoff Volume=2,$41 icf Hoff'D-epth= 0 4 u 0.42„ c 0.35 F 0 3 how �Lerigth-443' r. 0.25 ,T`c=i3:3 min 1 0.15 , - , - . - mac_/L.L/ - - - - -- - - -i-- - - i- - -- - -I - - -�- - ,,- 0 05 ' i // i 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) Pre-Development Runoff RegionlOWS Type 1124-hrALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 sin 06424 ©2011 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 1S: Pre-Dev Runoff = 3.02 cfs @ 12.07 hrs, Volume= 8,937 cf, Depth= 1.31" Runoff by SCS TR-20 method, UH=SCS, Time Span= 10.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-10YR Rainfall=5.50" Area (ac) CN Description 0.240 61 >75% Grass cover, Good, HSG B 1.640 55 Woods, Good, HSG B 1.880 56 Weighted Average 1.880 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.4 152 0.2700 0.24 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.30" 2.8 166 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 0.1 125 0.0500 27.65 439.72 Pipe Channel, 54.0" Round Area= 15.9 sf Perim= 14.1' r= 1.13' n= 0.013 13.3 443 Total Subcatchment 1S: Pre-Dev Hydrograph _ 3.02 cfs ^Runoff 3 Type II 24-hr ALB.10YR Rainfall=5.50" Runoff Area=1.880 ac 2 Runoff Volume=8,937'1cf W Runoff Depth=1.31" 5 Flow Length=443' Tc-13.' min 1 CN=56 /1.) '4'4/77 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) ti 1 S Pre— Dev SubCat Reach on. Link Drainage Diagram for RegionlOWS Prepared by Microsoft, Printed 9/28/2016 HydroCAD©9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Pre-Development Runoff RegionlOWS Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 2 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 1 S 0.00 0.00 125.0 0.0500 0.013 54.0 0.0 0.0 Pre-Development Runoff RegionlOWS Type II 24-hrALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software.Solutions LLC Page 3 Summary for Subcatchment 1S: Pre-Dev Runoff = 0.20 cfs @ 12,13 hrs, Volume= 1,500 cf, Depth= 0.22" Runoff by SCS TR-20 method, UH=SCS, Time Span= 10.00-26.00 hrs, dt= 0.05 hrs - Type 1124-hr ALB-01 YR Rainfall=3.00" Area (ac) CN Description 0.240 61 >75% Grass cover, Good, HSG B 1.640 55 Woods, Good, HSG B 1.880 56 Weighted Average 1.880 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.4 152 0.2700 0.24 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.30" 2.8 166 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 0.1 125 0.0500 27.65 439.72 Pipe Channel, 54.0" Round Area= 15.9 sf Perim= 14.1' r= 1.13' n= 0.013 13.3 443 Total Subcatchment 1S: Pre-Dev Hydrograph /. 0.22-' , ID Runoff 0.21=; --I 0.20 cfs f all 0 2=- iy p - �e h4=1i>�i '�t�='01R 0.19.--.- - --t-- , , : 0.16- _ 1- Rainfall=3.00"- 0.17c' -r I -- -r 7 I , _ I I Runoff Area=1.880 ac - - I ---r Runoff Vol- cf- . 0.13=' Tis0.12, ! -- -I .. noff �D u ep# 0.2 all . - -f � _ t I - - Lengt 443' 0.1 Flow 0 09" _ 0 I t. J L i -'Tc-1-3.3-thin.__, - I I I ' 0.05 0.04 _, ' I , 0.03 I - r 0.02 T j '���f!i iilfl. r 0.01 /��r��/{ r 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) Pre-Development Runoff RegionlOWS Type 11 24-hr ALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 1S: Pre-Dev Runoff = 0.65 cfs @ 12.10 hrs, Volume= 2,841 cf, Depth= 0.42" Runoff by SCS TR-20 method, UH=SCS, Time Span= 10.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-02YR Rainfall=3.60" Area (ac) CN Description 0.240 61 >75% Grass cover, Good, HSG B 1.640 55 Woods, Good, HSG B 1.880 56 Weighted Average 1.880 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.4 152 0.2700 0.24 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.30" 2.8 166 0.0400 1.00 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 0.1 125 0.0500 27.65 439.72 Pipe Channel, 54.0" Round Area= 15.9 sf Perim= 14.1' r= 1.13' n= 0.013 13.3 443 Total Subcatchment 1S: Pre-Dev Hydrograph Runoff 0.7 _ 0.65 cfs 0.65 Typ� �II 4-ki r-A, - - � LB--02YR- 06 - Rainfall=3.60" 0.55 too Runoff Area=1.880 ac 045 R,unOff Volume=2,841 04 r Ru nioff 'Depth=;O.42" 0.3511111 LL Flow t_ength=443' 0.25 ,Tc=13.�7 min - 0.2 CN=56 - 0.15 0.1 0.05 / ; 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) f 3S,„ Developed Subcat Reach A1111 Drainage Diagram for RegionlOWS Prepared by Microsoft, Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Development Runoff prior to SWM Plan 1-yr Region10WS Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 2 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 3S 0.00 0.00 125.0 0,0500 0.013 54.0 0.0 0.0 Development Runoff prior to SWM Plan 1-yr RegionlOWS Type 11 24-hr ALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment 3S: DevelopedRR Runoff = 0.90 cfs @ 12.09 hrs, Volume= 3,199 cf, Depth= 0.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 10.00-26.00 hrs, dt= 0.05 hrs Type 1124-hr ALB-01 YR Rainfall=3.00" Area (ac) CN Description 0.100 61 >75% Grass cover, Good, HSG B 0.040 55 Woods, Good, HSG B * 1.060 63 DA A(BioFilterl) -Adjusted CN for RR * 0.500 69 DA B(BioFilter2) -Adjsuted CN for RR * 0.180 56 DA C(DrySwale) -Adjusted CN for RR 1.880 64 Weighted Average 1.880 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 125 0.2700 0.23 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.30" 4.3 182 0.0200 0.71 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 0.1 125 0.0500 27.65 439.72 Pipe Channel, 54.0" Round Area= 15.9 sf Perim= 14.1' r= 1.13' n= 0.013 13.3 432 Total Development Runoff prior to SWM Plan 1-yr Region10WS Type 1124-hrALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/28/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 4 Subcatchment 3S: DevelopedRR Hydrograph 1 0.90 cfs Runoff Type II 24-hr ALB-01YR Rainfall=3.00" Runoff Area=1.880 ac Runoff Volume=3,199;cf Runoff Depth=0.47" LL i Flow Length=432' Tc=13.3 min eN=64 10 11 12 13 14 15 16 17 16 19 20 21 22 23 24 25 26 Time (hours) <9s> Area not goin to SWM DA to BioFilter#2 BioFilter#2 --� 7L <6S> /41\ X. 54" RCP DA to BioFilter#1 BioFilter#1 (8S) 10P DA to Dry Swale Dry Swale 4bcat Reach 'on. Link Drainage Diagram for Region10WS Prepared by Microsoft, Printed 9/29/2016 HydroCAD®9 10 sin 06424 ©2011 HydroCAD Software Solutions LLC SWM-Post-Dev Runoff 1-yr Region10WS Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 2 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 4P 403.25 402.65 61.0 0.0098 0.013 54.0 0.0 0.0 2 6P 401.10 393.88 98.0 0.0737 0.013 54.0 0.0 0.0 3 10P 409.50 406.00 61.4 0.0570 0.013 15.0 0.0 0.0 SWM-Post-Dev Runoff 1-yr Region10WS Type II 24-hr ALB-01 YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCADC,9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment 5S: DA to BioFilter#2 [49] Hint: Tc<2dt may require smaller dt Runoff = 0.56 cfs @ 11.97 hrs, Volume= 1,215 cf, Depth= 0.67" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type 1124-hr ALB-01YR Rainfall=3.00" Area (ac) CN Description 0.500 69 Adjusted CN from VRRM 0.500 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 5S: DA to BioFilter#2 mu Hydrograph ' 0 Runoff 0.6 ' 0.56 cfs ' Ali 0.55 4 1 Type II 24-hr ALB-01YR 0.5 1,: Rainfall=3.00" 0.45 Runoff Area=0.500 ac 0.4 Runoff Volume=1,.215 cf_. w0.35 2. Runoff epth 0.67"✓c 0.3 LL T-c=5.0 min 0.25 /^/^�� /� -_ -�----�- i -.._._ 1 - J =69. 0.2 0.15 ti i ilia : 6 0.1 0.05 j /, y / j L0 9 !. .1 13, 14 . . .16, 16 17 or 19 / 20 2• 20-�� Time (hours) L L L L SWM-Post-Dev Runoff 1-yr RegionlOWS Type Il 24-hr ALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 6S: DA to BioFilter#1 Runoff = 0.45 cfs @ 12.09 hrs, Volume= 1,665 cf,` Depth= 0.43" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-01YR Rainfall=3.00" Area (ac) CN Description * 1.060 63 Adjusted CN from VRRM 1.060 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 125 0.2700 0.23 Sheet Flow, Woods: Light underbrush n= 0.400 P2=3.30" 4.3 182 0.0200 0.71 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.2 307 Total Subcatchment 6S: DA to BioFilter#1 Hydrograph 05 ' - ----------- �Runoff 0 46 0.45 cfs - 0.46-- - , 1 044.:., •_ -1- , I i 1 Type-,N-24-h-r ALB-01YR---- o ,' 0.42 ' - Rainfall=3.00" 0.38=' - 0.36 ' Runoff'Area=1:060 ac r 0.34 , - gime 0.32` � 0.3.' ' Runoff Vgtume=t}i665 icf= 0.26J T Runoff_Depth=;0.43" 0 24� eur a o 22 , o • Flow Lenfh=307' 0.z - - - - 0 , f � 016 ' 0 - ��= 3:2 min - 0.16; , ON 01 ' ,- ! ' -J tlIllii 008 r f , , , , 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) bag SWM-Post-Dev Runoff 1-yr Region 10WS Type ll 24-hr ALB-01 YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 8S: DA to Dry Swale [49] Hint: Tc<2dt may require smaller dt Runoff = 0.03 cfs @ 12.01 hrs, Volume= 144 cf, Depth= 0.22" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-01YR Rainfall=3.00" Area (ac) CN Description * 0.180 56 Adjusted CN from VRRM 0.180 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 8S: DA to Dry Swale ` Hydrograph 0.036- -- -;-- -+- - off '- - -- - - -I----'- -- - ❑Run 0.034 ; 0.03 cfs I 0 032- 1Type-II-24-I'Fr ALB-01I R-- 003-- 1 I I I I 1 0 028 ' Rainfall=3.0D" 1 1 ' T , - III 1 I 0.026 -Runoff�4rea=0-.180 ac-✓ 0.024� 0.022 -------- ; I unoff'Vol me=14 cfs' w 0.02=' ., . ' -- • -Runoff-bepth=0-2-$"- - 0.018`' iu_ 0.016 Tc Omin 1 0 014"' ' - 0.012 j V I\= 0.01 0.008 ' - - I 0006 p �i + - I 0 / / / /- rx,%///47 r 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) III We lYri ire SWM-Post-Dev Runoff 1-yr Region 10WS Type ll 24-hr ALB-01 YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 9S: Area not going to SWM [49] Hint: Tc<2dt may require smaller dt Runoff = 0.05 cfs @ 12.00 hrs, Volume= 154 cf, Depth= 0.30" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type 1124-hr ALB-01YR Rainfall=3.00" Area (ac) CN Description 0.100 61 >75% Grass cover, Good, HSG B 0.040 55 Woods, Good, HSG B 0.140 59 Weighted Average 0.140 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 9S: Area not going to SWM Hydrograph itwo 0 055 ! Runoff 0.05 cfs 0.05 ' Type II 24-hr ALB-01YR 0045 Rainfall=3.00" 004 Runoff Area=0.140 ac 0.035 Runoff Volume=154 Of 003 � Runoff Depth=0.30" 0 025 Tc=5.0 m i n 0.02 CN=59 0.01 /— 0.005 V •r . .GFYry /%/ ,' _ear/,%///%• � 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) SWM-Post-Dev Runoff 1-yr Region 10WS Type II 24-hr ALB-01 YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 sin 06424 ©2011 HydroCAD Software Solutions LLC Page 7 Summary for Pond 4P: BioFilter#1 Inflow Area = 46,174 sf, 0.00% Impervious, Inflow Depth = 0.43" for ALB-01YR event Inflow = 0.45 cfs @ 12.09 hrs, Volume= 1,665 cf `✓ LOutflow = 0.02 cfs @ 17.44 hrs, Volume= 520 cf, Atten= 95%, Lag= 320.8 min Primary = 0.02 cfs @ 17.44 hrs, Volume= 520 cf Routing by Stor-Ind method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev= 412.51' @ 17.44 hrs Surf.Area=2,855 sf Storage= 1,168 cf Plug-Flow detention time= 479.1 min calculated for 519 cf(31% of inflow) Center-of-Mass det. time= 293.1 min ( 1,210.4 - 917.3 ) Volume Invert Avail.Storage Storage Description #1 412.00' 7,936 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 412.00 1,785 204.0 0 0 1,785 413.00 4,129 402.0 2,876 2,876 11,338 414.00 6,051 478.0 5,059 7,936 16,678 Device Routing Invert Outlet Devices #1 Primary 403.25' 54.0" Round Culvert L=61.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 403.25' /402.65' S= 0.0098 '/' Cc= 0.900 n= 0.013 #2 Device 1 412.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.02 cfs @ 17.44 hrs HW=412.51' (Free Discharge) Z1=Culvert (Passes 0.02 cfs of 202.73 cfs potential flow) L2=Orifice/Grate (Weir Controls 0.02 cfs @ 0.30 fps) SWM-Post-Dev Runoff 1-yr RegionlOWS Type II 24-hrALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 8 Pond 4P: BioFilter#1 do" Hydrograph I , I I Inflow (15. ---'- r r ❑Primary 0.45 cfs imso 0.46� 1 - q 1 , IF .�I 0.46� I T r- -r -- l of to t A ea=46, -74- f 0.44 1 i 0.42 i- L r i 1 'PeakE1ev_ 4iZ.51' T , I I I 038�,'".- � --- r r , � r r , � r 0.36 1 ,r- j i �o =1,�II-ef--0.32?" ,',. 1- -1 L - , I I •-/ I I , � I , I I I _ 0.3 ,' I • 0.283 a 0.26; -; % 7 r 1 , 1 I I , : : E / , f , J0.2'2 , i ii4 + 0.18 . 0.08 1 i III 1 1 -_ i 0.044 ,", „�� ,� - 0.02 cfs z / /, 0.02;f% ifs ,-- ' 0 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) € a I , iii _, , , t7 Y : I ; 7, ,,. SWM-Post-Dev Runoff 1-yr Region10WS Type II 24-hrALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 9 Summary for Pond 6P: BioFilter#2 Inflow Area = 21,780 sf, 0.00% Impervious, Inflow Depth = 0.67" r ALB-01YR event Inflow = 0.56 cfs @ 11.97 hrs, Volume= 1,215 cf Outflow = 0.05 cfs @ 12.78 hrs, Volume= 703 cf, Atten= 92%, Lag=48.3 min Primary = 0.05 cfs @ 12.78 hrs, Volume= 703 cf Routing by Stor-Ind method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev= 411.52' @ 12.78 hrs Surf.Area= 1,201 sf Storage= 533 cf Plug-Flow detention time= 267.5 min calculated for 703 cf(58% of inflow) Center-of-Mass det. time= 124.9 min ( 1,005.8 - 880.9 ) Volume Invert Avail.Storage Storage Description #1 411.00' 1,197 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 411.00 868 128.0 0 0 868 412.00 1,560 174.0 1,197 1,197 1,984 Device Routing Invert Outlet Devices #1 Primary 401.10' 54.0" Round Culvert L= 98.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert=401.10' / 393.88' S= 0.0737 '/' Cc= 0.900 n= 0.013 #2 Device 1 411.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.05 cfs @ 12.78 hrs HW=411.52' (Free Discharge) L1=Culvert (Passes 0.05 cfs of 218.85 cfs potential flow) L2=Orifice/Grate (Weir Controls 0.05 cfs @ 0.43 fps) SWM-Post-Dev Runoff 1-yr Region10WS Type II 24-hrALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 sin 06424 ©2011 HydroCAD Software Solutions LLC Page 10 Pond 6P: BioFilter#2 Hydrograph c I I I If I 0.56 cfs 1ow .. k 0.8 = J ❑Primary 0.55� I nf�1ow Area=21,780 sf i -3 1 1Peak�Elev 4111 _.52_'-- 0.45� 1 1 1 L�f�rage=5 3 e# I I t 0.4 1 L 1_ L L J E0.35-- ' /- 1- L 4' -- - a - -L- -- I 3 03 1, - 0.25? + + I I I 0.15 7- - i - r - ,- --r - r--- 0.05 cfs I 0.05 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 28 Time (hours) I I I I I a SWM-Post-Dev Runoff 1-yr Region 10WS Type II 24-hr ALB-01 YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 11 Summary for Pond 10P: Dry Swale Inflow Area = 7,841 sf, 0.00% Impervious, Inflow Depth = 0.22" for ALB-01YR event Inflow = 0.03 cfs @ 12.01 hrs, Volume= 144 cf,/ Outflow = 0.00 cfs @ 17.40 hrs, Volume= 49 cf, Atten= 92%, Lag= 323.4 min Primary = 0.00 cfs @ 17.40 hrs, Volume= 49 cf Routing by Stor-Ind method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev= 413.50' @ 17.40 hrs Surf.Area=247 sf Storage= 95 cf Plug-Flow detention time= 477.2 min calculated for 49 cf(34% of inflow) Center-of-Mass det. time= 264.7 min ( 1,225.9 - 961.2 ) Volume Invert Avail.Storage Storage Description #1 413.00' 252 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 413.00 138 52.0 0 0 138 414.00 386 79.0 252 252 427 Device Routing Invert Outlet Devices #1 Primary 409.50' 15.0" Round Culvert L= 61.4' CPP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 409.50'/406.00' S= 0.0570 '/' Cc= 0.900 n= 0.013 #2 Device 1 413.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 17.40 hrs HW=413.50' (Free Discharge) t-1=Culvert (Passes 0.00 cfs of 10.86 cfs potential flow) t-2=Orifice/Grate (Weir Controls 0.00 cfs @ 0.12 fps) SWM-Post-Dev Runoff 1-yr RegionlOWS Type II 24-hrALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 12 Pond 10P: Dry Swale Hydrograph 0.03 cfs r Y 0.036: - ❑Inflow 1 ❑Primary 0.034? `I 0.03� - -- ---P"ea-k-EIe .- -1i.50' 0.026� / 1 L. J L r L I ^^_{{0.026L Storage=95-W-- 0.024 7H L J L L 1 0.022?' I 3 0.018 ' '' 11 0.016= u. i 0.012�, v 0.01� I r I T 0.008� • 0.006- T T i r T I 0 004 1 0- / / ////i,/%///.�/r., 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) SWM-Post-Dev Runoff 1-yr RegionlOWS Type 1124-hrALB-01YR Rainfall=3.00" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 13 Summary for Link 7L: EX. 54" RCP Inflow Area= 81,893 sf, 0.00% Impervious, Inflow Depth > 0.21" for ALB-01YR event Inflow = 0.05 cfs @ 12.77 hrs, Volume= 1,427 cf "'' Primary = 0.05 cfs @ 12.77 hrs, Volume= 1,427 cf, Atten= 0%, Lag= 0.0 min Ytll- j,: `f Primary outflow= Inflow, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs "'Io i f L Link 7L: EX. 54" RCP Hydrograph low 0.06 rn nc pf� ❑Inflow _❑Primary 0.05 cfs Inflow Aroma=81-1$93-sf 005- ---- - I/ 0/ war am (T) 0.035-: ' , iri/01 LI?' 0.03: i I •��� o�e"� # um 0.025 � 1 r � 0.02; I t f 0.015� j , r r a 084 0.01/ - - ii 0(/� r 0.005_ �� �ii-1 I .� �ydr IWO 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) um raw rr my Wm kr <9s> Area not goin to SWM 5S /6ND DA to BioFilter#2 BioFilter#2 <6S> > A4P X. 54" RCP DA to BioFilter#1 BioFilter#1 (8s > 10P DA to Dry Swale Dry Swale Subcat> Reach 'on• Link Drainage Diagram for RegionlOWS Prepared byMicrosoft, Printed 9/29/2016 P HydroCAD®9.10 sin 06424 ©2011 HydroCAD Software Solutions LLC SWM-Post-Dev Runoff 2-yr Region10WS Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 2 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 4P 403.25 402.65 61.0 0.0098 0.013 54.0 0.0 0.0 2 6P 401.10 393.88 98.0 0.0737 0.013 54.0 0.0 0.0 3 10P 409.50 406.00 61.4 0.0570 0.013 15.0 0.0 0.0 SWM-Post-Dev Runoff 2-yr Region10WS Type II 24-hr ALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment 5S: DA to BioFilter#2 [49] Hint: Tc<2dt may require smaller dt Runoff = 0.89 cfs @ 11.97 hrs, Volume= 1,841 cf, Depth= 1.01" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-02YR Rainfall=3.60" Area (ac) CN Description 0.500 69 Adjusted CN from VRRM 0.500 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 5S: DA to BioFilter#2 ' iiii Hydrograph ' 0 Runoff L 0.95 0.89 cfs 0.9 Type 1124-ti AL-B-02Y Rainfa - :6 _ Ruigaf Area=�0.5Q0 ac - 065 - - Runoff VIuine=1,A4'f 0.55-- ._ _* 3 0.5z' r 1 -Runoff Espial=1.0f' ( s 0.45 =5:0 min 04= : j 0.3:: T . - , _69-- 0.3� 1 0.25% 0.2. 0.15� 00 0.1% , 1 � jsr + - - , , k , 4.0-4.-„,,,; ,, / ,- ,:,, , - • ,zi ---.--, /, -,7, 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 25 Time (hours) ' I 1 I LL, 1 I 1 ! k i SWM-Post-Dev Runoff 2-yr RegionlOWS Type 1124-hrALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 6S: DA to BioFilter#1 Runoff = 0.95 cfs @ 12.07 hrs, Volume= 2,910 cf, Depth= 0.76" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type 1124-hr ALB-02YR Rainfall=3.60" Area (ac) CN Description * 1.060 64 Adjusted CN from VRRM 1.060 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 125 0.2700 0.23 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.30" 4.3 182 0.0200 0.71 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.2 307 Total Subcatchment 6S: DA to BioFilter#1 Hydrograph Runoff 1 0.95 cfs Type ll 24-hr ALB-02YR Rainfall=3.60" Runoff Area=1.060 ac Rynoff Volume=2,910 cf Runoff Depth=0.76" LL Flow Length=307' Tc=13.2 min CN=64 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) tint ONO rtr fir SWM-Post-Dev Runoff 2-yr Region10WS Type 1124-hrALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 8S: DA to Dry Swale [49] Hint: Tc<2dt may require smaller dt Runoff = 0.10 cfs @ 11.99 hrs, Volume= 272 cf, Depth= 0.42" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-02YR Rainfall=3.60" Area (ac) CN Description * 0.180 56 Adjusted CN from VRRM 0.180 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 8S: DA to Dry Swale Hydrograph 0.01 y - 0.10 cfs j 0 Runoff - 0.095-1 l' T yp T e 01 24-hr ALB-02XR-- 0.085-- - .Rainfall=3.S0" -. �A� �--Runoff rea 0'�80 ac 0.07? 0065 ,_ Runoff Volume=272 cf - 006" _ 0 055' ;Run-off Depth=0.42" I I 0 0 05 : LL I 0.045 -Tc 5rO--min- 0.04? . 0.035 ' CN-56 0.03' . 0 025 ' , ' 4 i ' 0.01-' 0.005: ii 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) SWM-Post-Dev Runoff 2-yr Region10WS Type II 24-hr ALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 9S: Area not going to SWM [49] Hint: Tc<2dt may require smaller dt Runoff = 0.11 cfs @ 11.98 hrs, Volume= 271 cf, Depth= 0.53" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-02YR Rainfall=3.60" Area (ac) CN Description 0.100 61 >75% Grass cover, Good, HSG B 0.040 55 Woods, Good, HSG B 0.140 59 Weighted Average 0.140 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, — Subcatchment 9S: Area not going to SWM Hydrograph _ 1 0.12- -- I 1 � I � a __ . ❑Runoff 0.115 o.11 0 ' L 1 y c ' TYPe-N-2-4=hr'At B=f�YR-_ 0.105 ' - L ' 1 -I 'RainfaIr=3.60"-- - 0095 , ! � 1 � 0.085 RunoffAr = .-'� 0Cr I . 'w00775 -i _ .: Runoff Volume=271-Cf 3 0 Runoff Depth=0.53" LL0.055 i - 005 . - 1 Tc-5.0-man - 0045 0.04 - CN=59 0.035-+- - I - - - 0.03 ' di 0.025_' I ' I 0 -' 0.01 ! - - -',- - - - -' I I I I 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) SWM-Post-Dev Runoff 2-yr RegionlOWS Type ll 24-hr ALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 7 Summary for Pond 4P: BioFilter#1 Inflow Area = 46,174 sf, 0.00% Impervious, Inflow Depth = 0.76" for ALB-02YR event Inflow = 0.95 cfs @ 12.07 hrs, Volume= 2,910 cf Outflow = 0.11 cfs @ 12.96 hrs, Volume= 1,765 cf, Atten= 88%, Lag= 53.0 min Primary = 0.11 cfs @ 12.96 hrs, Volume= 1,765 cf Routing by Stor-lnd method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev= 412.53' @ 12.96 hrs Surf.Area=2,907 sf Storage= 1,232 cf Plug-Flow detention time= 261.3 min calculated for 1,765 cf(61% of inflow) Center-of-Mass det. time= 121.9 min ( 1,014.3 - 892.3 ) Volume Invert Avail.Storage Storage Description #1 412.00' 7,936 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 412.00 1,785 204.0 0 0 1,785 413.00 4,129 402.0 2,876 2,876 11,338 414.00 6,051 478.0 5,059 7,936 16,678 Device Routing Invert Outlet Devices #1 Primary 403.25' 54.0" Round Culvert L= 61.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 403.25' /402.65' S= 0.0098 '/' Cc= 0.900 n= 0.013 #2 Device 1 412.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.11 cfs @ 12.96 hrs HW=412.53' (Free Discharge) t-- Culvert (Passes 0.11 cfs of 203,05 cfs potential flow) 2=Orifice/Grate (Weir Controls 0.11 cfs @ 0.57 fps) SWM-Post-Dev Runoff 2-yr RegionlOWS Type 1124-hrALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 8 Pond 4P: BioFilter#1 Hydrograph 0.95 cfs o❑Inflow Primary ry 1 Inflow Area=46,174 sf Peak Elev=412.53' Stora9 a=1 232 cf o i K t I 0.11 cfs 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) Lei L L L L SWM-Post-Dev Runoff 2-yr Region10WS Type 1124-hrALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 sin 06424 ©2011 HydroCAD Software Solutions LLC Page 9 Summary for Pond 6P: BioFilter#2 Inflow Area = 21,780 sf, 0.00% Impervious, Inflow Depth = 1.01" for ALB-02YR event Inflow = 0.89 cfs @ 11.97 hrs, Volume= 1,841 cf Outflow = 0.33 cfs @ 12.08 hrs, Volume= 1,328 cf, Atten= 63%, Lag= 7.0 min Primary = 0.33 cfs @ 12.08 hrs, Volume= 1,328 cf Routing by Stor-Ind method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev= 411.56' © 12.08 hrs Surf.Area= 1,233 sf Storage= 589 cf Plug-Flow detention time= 176.9 min calculated for 1,328 cf(72% of inflow) Center-of-Mass det. time= 66.6 min ( 933.0 -866.4 ) Volume Invert Avail.Storage Storage Description #1 411.00' 1,197 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 411.00 868 128.0 0 0 868 412.00 1,560 174.0 1,197 1,197 1,984 Device Routing Invert Outlet Devices #1 Primary 401.10' 54.0" Round Culvert L= 98.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 401.10'/393.88' S= 0.0737 '/' Cc= 0.900 n= 0.013 #2 Device 1 411.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.32 cfs @ 12.08 hrs HW=411.56' (Free Discharge) L1=Culvert (Passes 0.32 cfs of 219.45 cfs potential flow) L2=Orifice/Grate (Weir Controls 0.32 cfs @ 0.81 fps) SWM-Post-Dev Runoff 2-yr Region10WS Type II 24-hr ALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 10 Pond 6P: BioFilter#2 tom Hydrograph i . . , , , : , __ Inflow r 0.89 cfs �-1 ; 1 I I - ['Primary I L 095 • 0.9-� / i - 1�'1_ftow`Atea=21,780$f-- 0.85 • 0.6= r r Pe2�k;�1v= mot 1.5 L0 75 Storage-=589 cf 0.7� _ 0.65% 1 L 1 I 1L 1 I 1 I I � I, 0.6-E 1 L L__ a 0.55% 0.5� �/ -T-- --„r- e --- -IT r r , - r 0.45- 0.4-' • --- 0.33 cfs 0.35 i ,ir0.25-t- L - 0.2 0.15, 0.1 0.05- , /% . / / ,,/ ,/, 9 10 11 12 13 14 1.5 1.6 17 18 1"9 20 21 22 23 .. . 24 25 26 Time (hours) SWM-Post-Dev Runoff 2-yr Region10WS Type II 24-hr ALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 11 Summary for Pond 10P: Dry Swale Inflow Area = 7,841 sf, 0.00% Impervious, Inflow Depth = 0.42" for ALB-02YR event Inflow 0.10 cfs @ 11.99 hrs, Volume= 272 cf Outflow = 0.01 cfs @ 12.96 hrs, Volume= 177 cf, Atten= 89%, Lag= 57.9 min Primary = 0.01 cfs @ 12.96 hrs, Volume= 177 cf Routing by Stor-lnd method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev= 413.51' @ 12.96 hrs Surf.Area=248 sf Storage= 96 cf Plug-Flow detention time= 242.5 min calculated for 177 cf(65% of inflow) Center-of-Mass det. time= 106.1 min ( 1,031.6 - 925.5 ) Volume Invert Avail.Storage Storage Description #1 413.00' 252 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 413.00 138 52.0 0 0 138 414.00 386 79.0 252 252 427 Device Routing Invert Outlet Devices #1 Primary 409.50' 15.0" Round Culvert L=61.4' CPP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 409.50' /406.00' S= 0.0570 '/' Cc= 0.900 n= 0.013 #2 Device 1 413.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.01 cfs @ 12.96 hrs HW=413.51' (Free Discharge) L1=Culvert (Passes 0.01 cfs of 10.86 cfs potential flow) L2=Orifice/Grate (Weir Controls 0.01 cfs @ 0.24 fps) SWM-Post-Dev Runoff 2-yr Region10WS Type II 24-hr ALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 12 Pond 10P: Dry Swale Hydrograph { j �---I----- + - I I ❑Inflow 0.105% L_ ❑Primary �rea= ;8a $# 0095� -I--- 7 r r t 7 t T r 0.065-:- I 1 1 J J. 1 I L ::: 75 I 1 1 I I I i 1orage= 6cf1 1 1 1 1 107� L 1 I 1 1 L165'� , - 1 L 160 a - T I 1 I 1 1 1 `r0.055� a. 3 I I I I I I I I 0 0.05 1 L L 1 - ,'," 1 I bt i I 1 I I I I v.: V.O.O45:� . t- --I---I- - --I- -- -I-- -t--- t-- -I- I -I --t- --t-- L0.045 4 1 1 ' .----1- 1 1 I 1 I 1 0.035= L 0.025-' 4- r 4r t -1 r r 0.015 0.01 cfs 1 I I I I 001T:T‘ 7 / 0.005'� 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) 10 Li -. L L L SWM-Post-Dev Runoff 2-yr RegionlOWS Type ll 24-hr ALB-02YR Rainfall=3.60" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 13 Summary for Link 7L: EX. 54" RCP Inflow Area = 81,893 sf, 0.00% Impervious, Inflow Depth > 0.52" for ALB-02YR event Inflow = 0.40 cfs @ 12.07 hrs, Volume= 3,541 cf Primary = 0.40 cfs @ 12.07 hrs, Volume= 3,541 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Link 7L: EX. 54" RCP AM Hydrograph tv 0.44 y _MAP 1 _ _•- __7__ 1 __r-_ - ❑ Inflow �+ D Primary 0.42- ,---- 0.40 cfs 1 ,, J L_ = 0.4- ; r Inflow Ai'ea=81,89 $f__ 0.38 I 1 . I ; - - ' -- �_ - 1 I ' - I -- 0' _! _I _!. L I ! 1 L _ J ! _,i I I 0.34� T r r T r ,- 0.32-y' ' 1 _._ I r. 0.3� 7 1 L ___ .- ., 1 ,. L0.28i, ,',I. r ; T___r_ _ -I__ _1___r _ _r _ 0 u 0.24:' L ,. 3 0.22� ,L r ?s 0.21$ t ,L_ IL 11v. 0.18 _ . . L � J J---1---�--- 0.14f -- - , ✓ -r r r 0.12 , I _. ie 'f . J i J J 1 L 0.06 ; 1 '"' mil/f/ // '//f//./ yy I 0.04 Zr 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) t I I L, ,- L 1 9S Area not goin to SWM 5S 6P DA to BioFilter#2 BioFilter#2 = 7L 6S /41\-\\\\ X. 54" RCP DA to BioFilter#1 BioFilter#1 <8S> D 10P DA to Dry Swale Dry Swale Subcat Reach 'on• Link Drainage Diagram for Region10WS Prepared by Microsoft, Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC SWM-Post-Dev Runoff 10-yr Reg ion 10WS Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 2 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 4P 403.25 402.65 61.0 0.0098 0.013 54.0 0.0 0.0 2 6P 401.10 393.88 98.0 0.0737 0.013 54.0 0.0 0.0 3 10P 409.50 406.00 61.4 0.0570 0.013 15.0 0.0 0.0 SWM-Post-Dev Runoff 10-yr Region10WS Type II 24-hrALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment 5S: DA to BioFilter#2 [49] Hint: Tc<2dt may require smaller dt Runoff = 2.18 cfs @ 11.96 hrs, Volume= 4,382 cf, Depth= 2.41" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-10YR Rainfall=5.50" Area (ac) CN Description * 0.500 70 Adjusted CN from VRRM 0.500 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 5S: DA to BioFilter#2 Hydrograph 2. $ CfS� Runoff i Type��al-2h- r ALB-a OAR 2 Rainfall=5.50" Runoff Area=0.500 ac Runoff Volume=4,382 cf Run ffDe 'Depth=2.41" pth 2.41 , LL T-c5:e n 1 CN=70 r 14/ ''' , , 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) SWM-Post-Dev Runoff 10-yr Region10WS Type 11 24-hr ALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 6S: DA to BioFilter#1 Runoff = 2.83 cfs @ 12.06 hrs, Volume= 7,675 cf, Depth= 1.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type 1124-hr ALB-10YR Rainfall=5.50" Area (ac) CN Description ' 1.060 65 Adjusted CN from VRRM 1.060 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.9 125 0.2700 0.23 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.30" 4.3 182 0.0200 0.71 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.2 307 Total Subcatchment 6S: DA to BioFilter#1 Hydrograph / r r r r- -. - - - - - ------ - r ❑Runoff 3 2.83 cfs Type II 24-hr ALB-10YR Rainfall=5.50" Runoff Area=1.060 ac 2 Rynoff Volume=7,675 'cf w ` Runoff Depth=1.99" Flow Length=307' Tc= 3.2 min CN=65 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) SWM-Post-Dev Runoff 10-yr Region10WS Type II 24-hrALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 8S: DA to Dry Swale [49] Hint: Tc<2dt may require smaller dt Runoff = 0.43 cfs @ 11.97 hrs, Volume= 902 cf, Depth= 1.38" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-10YR Rainfall=5.50" Area (ac) CN Description * 0.180 57 Adjusted CN from VRRM 0.180 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 8S: DA to Dry Swale -- Hydrograph - - _ , Runoff 046 0. = ---;- 0 43 cfs 0.42441 y , Type-�M-24-1tr;ALB-1 OYR -- 0.4� I I R 0 0.361 $ y y �„ai nfal11=5. 0 - 0.34=' Runoff-Area=6.4 0ac-- 032? y--- U.3 , Runoff Volume=90Z tf-_0.28 t 0.26 0.24� -1 ;Runoff-Depti F'�'1,3r-- . LL a 0.22_ i _ I 1 1 J 1 J J 1 .. _ I I I I i I i r n 0.2_' _---r-- -7 I I ,1----Tcy&O-min- 0.18 a , 1 1 I I 1� -I I �- I I � I I f I 1 y 1 0.08� 1 1 1 I 1 f 0.041 I I I I !'`� may' ` 0.02" .111 C/yy� i1 ��i�ie�Idi" �f�� i�J,����5,141e ,, L 0'. , . �`: . . . . . . .:. Time ,' ; , . . ,. , . . , . , 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 e (hours) F 1, i f, i I , ,i r SWM-Post-Dev Runoff 10-yr Region10WS Type II 24-hrALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 9S: Area not going to SWM [49] Hint: Tc<2dt may require smaller dt Runoff = 0.37 cfs @ 11.97 hrs, Volume= 776 cf, Depth= 1.53" Runoff by SCS TR-20 method, UH=SCS, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs Type II 24-hr ALB-10YR Rainfall=5.50" Area (ac) CN Description 0.100 61 >75% Grass cover, Good, HSG B 0.040 55 Woods, Good, HSG B 0.140 59 Weighted Average 0.140 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 9S: Area not going to SWM Hydrograph _. 0.4 0.37 cfs J ❑Runoff 0.38: Type II 24-h r A> !B-I 0YR MiN 0.34 ;Rainfall=5.50" 0.32 0.32 0 28 Runoff Area=0.'f4-0 ac °26 Runoff Volume=776-cf 0.24" } 0.22 Runoff Depth=1.53" - 3 LL 018 ' ; Tc=5:0-min- 0.16 _a 0.08 0.06 ; 004 lr 002 /ir i_ r / J' 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) SWM-Post-Dev Runoff 10-yr RegionlOWS Type II 24-hr ALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 7 Summary for Pond 4P: BioFilter#1 Inflow Area = 46,174 sf, 0.00% Impervious, Inflow Depth = 1.99" for ALB-10YR event Inflow = 2.83 cfs @ 12.06 hrs, Volume= 7,675 cf Outflow = 2.13 cfs @ 12.15 hrs, Volume= 6,523 cf, Atten=25%, Lag= 5.4 min Primary = 2.13 cfs @ 12.15 hrs, Volume= 6,523 cf Routing by Stor-Ind method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev= 412.72' @ 12.15 hrs Surf.Area= 3,377 sf Storage= 1,830 cf Plug-Flow detention time= 107.4 min calculated for 6,523 cf(85% of inflow) Center-of-Mass det. time= 36.7 min ( 895.1 -858.4 ) Volume Invert Avail.Storage Storage Description #1 412.00' 7,936 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 412.00 1,785 204.0 0 0 1,785 413.00 4,129 402.0 2,876 2,876 11,338 414.00 6,051 478.0 5,059 7,936 16,678 Device Routing Invert Outlet Devices #1 Primary 403.25' 54.0" Round Culvert L=61.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 403.25' /402.65' S= 0.0098 '/' Cc= 0.900 n= 0.013 #2 Device 1 412.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.13 cfs @ 12.15 hrs HW=412.72' (Free Discharge) t-1=Culvert (Passes 2.13 cfs of 205.78 cfs potential flow) t-2=Orifice/Grate (Weir Controls 2.13 cfs @ 1.54 fps) SWM-Post-Dev Runoff 10-yr RegionlOWS Type 1124-hrALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 8 Pond 4P: BioFilter#1 Hydrograph 2.83 ❑Inflow 83 cfS ! 1 Primary 3 Inflow Area=46,174 sf Peak Elev=412.72' 2.13 cfs Storage=i,830 cf-- a o T. i i 1- i i it 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 "�` Time (hours) SWM-Post-Dev Runoff 10-yr Region10WS Type 11 24-hr ALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 9 Summary for Pond 6P: BioFilter#2 Inflow Area = 21,780 sf, 0.00% Impervious, Inflow Depth = 2.41" for ALB-10YR event Inflow = 2.18 cfs @ 11.96 hrs, Volume= 4,382 cf Outflow = 2.02 cfs @ 11.99 hrs, Volume= 3,874 cf, Atten= 7%, Lag= 1.6 min Primary = 2.02 cfs @ 11.99 hrs, Volume= 3,874 cf Routing by Stor-Ind method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev= 411.71' © 11.99 hrs Surf.Area= 1,341 sf Storage= 781 cf Plug-Flow detention time= 81.1 min calculated for 3,863 cf(88% of inflow) Center-of-Mass det. time= 24.5 min ( 862.9 -838.4 ) Volume Invert Avail.Storage Storage Description #1 411.00' 1,197 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 411.00 868 128.0 0 0 868 412.00 1,560 174.0 1,197 1,197 1,984 Device Routing Invert Outlet Devices #1 Primary 401.10' 54.0" Round Culvert L= 98.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 401.10' /393.88' S= 0.0737 '/' Cc= 0.900 n= 0.013 #2 Device 1 411.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.95 cfs @ 11.99 hrs HW=411.71' (Free Discharge) t1=Culvert (Passes 1.95 cfs of 221.39 cfs potential flow) t-2=Orifice/Grate (Weir Controls 1.95 cfs @ 1.49 fps) SWM-Post-Dev Runoff 10-yr Region 10WS Type II 24-hr ALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 10 Pond 6P: BioFilter#2 Hydrograph I I I inflow 2.18 cfs r�Primary wow !- - Inflow Area=21,780 sf 2.02 cfs 2- Peak Elev=411.71' _ I I Storage=781 cf i � I t I I I I I I I I I I im 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 .r Time (hours) I SWM-Post-Dev Runoff 10-yr Region 10WS Type 1124-hr ALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 11 Summary for Pond 10P: Dry Swale Inflow Area = 7,841 sf, 0.00% Impervious, Inflow Depth = 1.38" for ALB-10YR event Inflow = 0.43 cfs @ 11.97 hrs, Volume= 902 cf Outflow = 0.41 cfs @ 11.98 hrs, Volume= 806 cf, Atten= 3%, Lag= 0.6 min Primary = 0.41 cfs @ 11.98 hrs, Volume= 806 cf Routing by Stor-Ind method, Time Span= 9.00-26.00 hrs, dt= 0.05 hrs/3 Peak Elev=413.57' @ 11.98 hrs Surf.Area=265 sf Storage= 114 cf Plug-Flow detention time= 74.6 min calculated for 803 cf(89% of inflow) Center-of-Mass det. time= 21.2 min ( 894.8 -873.6 ) Volume Invert Avail.Storage Storage Description #1 413.00' 252 cf Custom Stage Data (Irregular)Listed below (Recalc) Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft) 413.00 138 52.0 0 0 138 414.00 386 79.0 252 252 427 Device Routing Invert Outlet Devices #1 Primary 409.50' 15.0" Round Culvert L=61.4' CPP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 409.50' /406.00' S= 0.0570 '/' Cc= 0.900 n= 0.013 #2 Device 1 413.50' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.40 cfs @ 11.98 hrs HW=413.57' (Free Discharge) L1=Culvert (Passes 0.40 cfs of 10.97 cfs potential flow) t2=Orifice/Grate (Weir Controls 0.40 cfs @ 0.88 fps) I I SWM-Post-Dev Runoff 10-yr Region10WS Type ll 24-hrALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 12 Pond 10P: Dry Swale Hydrograph 1 ' QV ❑Inflow 10.43 cfs = 0 Prima ry0.46 -- • / I I L L I I I J i L IMb 0.44 0.41 CfS rl---rr IntlorwrA�Qa -844- f-- 0.42� r Li 0.36✓ - -- t 038". Peak rev=4 : --- 0.34- i L L i ' StorageT114-cf-- 0.32 1 f I I I 03_' T r 1 1 f 1 1 1 L , . 0.26? 1L - 1 'v 0.264 1 J/ T 1 1 1 -- 1 l T T r -1 l T ....L u. 0.24.J• , } 1 L 1 J 1 1 I J 1 L . . 1 1, ... 1 ttztii 0.16 ,, I 0,1_�• 1 L L ., 1 1 L- J ___1___L ___ 0.06� 1 -T r I 1 T r r 1 1 , T r 0.06-2 J 1 1 L 1 a 1 L 0 =i/1//�%Ar /'' /f �. 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) SWM-Post-Dev Runoff 10-yr Region 10WS Type II 24-hr ALB-10YR Rainfall=5.50" Prepared by Microsoft Printed 9/29/2016 HydroCAD®9.10 s/n 06424 ©2011 HydroCAD Software Solutions LLC Page 13 Summary for Link 7L: EX. 54" RCP Inflow Area = 81,893 sf, 0.00% Impervious, Inflow Depth = 1.76" for ALB-10YR event Inflow = 3.06 cfs @ 12.08 hrs, Volume= 11,980 cf Primary = 3.06 cfs @ 12.08 hrs, Volume= 11,980 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span=9.00-26.00 hrs, dt= 0.05 hrs _, Link 7L: EX. 54" RCP Hydrograph - I ` I '1nRrfg I 1 ❑Inflow Ir ❑Primary s.o6 cfs Inflow Area=81 ,893 sf 3 1 H 2 1 I Ti -I 0 - -' , t , , � . ,%�ly�� !/l/!/////.may 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Time (hours) rr IVO Project Name: Region Ten-Women's Shelter CLEAR ALL data Input tells -- Deb: 8/1/2016 (Ctrto3hlf 91 'mmtaM valsses _ Linear Development Project? No Site Information renal results Post-Development Project(Treatment Volume and Loads) Enter Total Disturbed Area(acres) 4 MIME Check - - - - _.---- _. Specifications : 0---s&Spore w BMPl2e 9 SpecFcaN List:20115tds&Spec.. Maximum reduction required:I, 1t --- linear p ject? No -_----- --- The sire's net Increase in impervious cover(acres)is:Biliegma Land cover areas entered correctly? V Post-Development TP Load Reduction for Site R6/yr/ 11111221111. Total disturbed area entered? c/ Pre-ReDevelopment Land Cover(acres) WNW A Solis BSoiis C Soils DSalk Totals hers./Open Space Paves)-undisturbed, • protected forest/openspan or reforested land 1.64 1'60 Managed Turf(acres) disturbed,graded for - --- _ - yards or other wrt to be mowed/managed 0.24 021 ImperviousCwerlaaesl MOO 0.00 1.88 KIWI Post-Development land Cover(acres) /(.03 - - -- ASolis Stalls i/ CSalis Dsolis Totals Freese/Open Space(awes) undisturbed. -'`� L05 • Protected forest/open space or reforested land , 1.05 Managed Turf tapes) disturbed graded for - --- -' 9149 yards or other turf to be mowed/maneged 0.39 / ' !f I 039 Impervious Cover(acres) OA4 ✓ 0.94 Area Check OK. OK. OK. OK. 1.88 •Forest/Open Space areas mat be protected in accordance with the lamina,Runoff Seduction Method Constants Runoff Coefficients(Rv) WNW Annual Rainfall(inches) 43 ASoils B Soils CSolls 0 Solis ' Target Rainfall Event(inches) 1.00 Forest/Dpen Space 0.02 0.03 0.04 0.05 Total Phosphorus(TO)EMC(mg/L) 0.26 Managed Turf 0.15 0.20 0.22 0.25 Total Nitrogen(TN)EMC(mg/LI 1.86 Impervious Cover 0.95 0.95 0.95 0.95 Target TP toad pis/acre/yrI 0.41 Pilunitkumrrecponfactor) 0.90 -- - - - - arga LAND COVER SUMMARY-PRE-REDEVELOPMENT LAND COVER SUMMARY--POST DEVELOPMENT Land CoverSummoryire ..-....._---.-__ Land CoverSummaryPust Land Cover5ummary-Post he-ReOevelopm.M Ivied Adjusted' Post-ReDeyebpmant Post4yebpment New Impervious Forest/Open Spa¢Cwer)acres) ).fide 120 Forest/Open Space 3.05 forest/Open Space Cover Cover(acres) Cover(acres) Weighted.(forest) 0.03 0.03 '®' Weighted Rv(forest) 0.03 iM %Forest 87% 83% ��. _ . %Forest 73% Managed Turf Cover(acres) 0.24 0.24 Managed Turf Cover 039 Managed Turf Cwer 0.39 (acres) (acres) Weighed Rv(Nrt) 0.20 0.20 Weighted Rv(turf) 0.20 Weighted M(turf) 0.20 %Managed Turf 13% 17% IS Managed Turf 27% 0c Cover a ReDev.Impervious New Impervious Cover *NW Impervious 1 acres) OA0 0.00 Impervious Cover 0.99 [over(acres)us 0.00 )acres) 0.44 ReQmpervaus) 0.95 0.95 �1 _ - Rvlimperv0us) 0.95 Rvfimpervbus) 0.95 _. %Impervious 0% 0% 11C1=11111® %Impervious 0% -_-... . Total Sle Area lean) 1.8I 1.44 Fialsee Area lures) 1.at Total RaDev.S.Area 1.44 (acres) Site Rv 0.05 0.06 Final Pest Den Me Re 0.28 ReDee Site Rv 0.08 ONO Treatment Volume and Nutrient Load I Treatment Volume and Nutrient Load Final Pre ReOenebpmeMTeatment Volume P ea<al Post-Development Oataeflerelopment Post Development (ac¢k) 0.0081 0.0070 Tr volume 0.0440 Treatment Volume 0.0091 Treatment Volume 0.0348 (acre k) (acre ft) (acre m e pment Final Post-Development Post ReOeeb Post Pe ReDev I0 Treatment volume 353 305 acme t Volume 1,915 t Volume t 397 Tr¢tna nn Volume n< Pubic feet) Tro(cubic feet) T Imlblc keq reed pubic 1,517 PrePeono.lopmint TP toad Final Post -ReOeuelppment p Oevebpmmi TP 0.22 0.19 • Development TP Load 1.20 • Load fro) 0.25 0.95 1117 (lb/Yr) �./ (Ib/Yr) (WWI. W.f./yr) Pre Re0ereiapmem TO toad per acre F. wbpmml TP IIb/acre/M 0.12 0.13 • d are n Lv post PeOe O.R4 Wad acre al) le/ac.e/M Rb/wm/yrl Baseline TP toed(lb/ill Dim Reduction Required VINO lA.at lbs/aoe/yrapplied to pre redev¢dmell area euluding ASS (Below Pre tots law proposed los new impervious covert woe proem Wad) 'Ad}uked sand Cover Summ TP Load Reduction o ret.oeeslopm<Ml,od rover minus pervious lend rovea daretVopen spvice or • Required for TP Load Reduction mmaged tod)vtaeoge proposed for new Impervious roar. Redeveloped Area -034 Required forNew 0.77 (Ib/Yr) Impervious Ares(lb/Yr) Adjusted tote)acreage is consistent with Past Re0ewl0pment acreage(minus came •of new impervious cover} •Rellaaion bebwnew development load Nmitmion not required Column I shows Mod redaction nqurkmentfor new impervious cover(based on new development food limit 0..61 Ibs/care/or). • Mir Post-Development Requirement for Site Area • TO Load Reduction Required(Ib/yr) 0.43 SW MIN I Mow Loads Onfannstionnl Pupae,Only) And larAMepnenTM tad . rwiDYwMwStTV wdM1lw) L55 - �j ! w�rit 4i llerYMrMer) UI ryM) 1 �...,.,, I I I I I I I I 41.111 illiW . $ $ EEEE R e $ e R 3 y e. a $ 8 8 5 ! 8. a 8 8 e s R ��a x 8 a 8 8 $ e 8 e $ 8 R ! 8 88 8 8 e e$ 8 8 8 8 R R `¢o wur 85i e R $ $ e $ e $ o R R $ 8 8 $ 8 $ EE $ 8 E R $ $ 8 R vE- Hx 8 8 8 E 8 B 8 8 8 8 : : : e8 88 $ o B8eo : . . 8 ,. g m 4 8 g g 2 ^ o e o liP OM n 8 E II'— 1 p9 o 1 F I a 8 R R $ S 8 8 $ $ R e 8 8 8 $ 8 8 $ e 8 8 g $ $ EE 0 $ o e o $ o 8 $ 8 e 8 8 8 8 o e $ 8 e 1 ! 8 8 8 8o E € 01 8 8 8 R $ $ 8 $ R e R R 8 8 8 $ 8 8 3 $ $ g e 8 EEE 5 E $ rrr 1,7 Q n t EEEEEEEEE ! e e s El s s II a e R s R r 3€Y o 0 0 0 o 8 8 8 r o 8 8 8 .. 8 8 8 8 8 8 R 00 0 o ^ W f5z F ; o e o e e o 0 0 o e e o o e e e e e ` • o e e o o e o Lm -zs tor g g a e : E o o e e o 0 0 o e o o e o o e e e e ffi e e e e o 0 o e \\, Se e e 8 > e e e o 0 0 o e o o a o 0 0 0 o e o e a e o e o e o o 8 — $ I "- a5e e e e e e e e e a e e e e • • e e 2¢c f a-, SW & et .L= o _ ill 1 F= n 8 0 0 u r s,1 o a 1 IIIIP I > '8 C 8 8 8 8 8 8 8 e 8 g # ^ 8 88 8 8 8 e 8 R 8 rc§ i 1 e ; s x 1 - g ,,g..9$ 294 8 zs a '7 '; - r "& £gig s e g a4 $ see • M g Y I • 6_fi_ 8�' lsi`z ,s s8 = § X $l Xt lr o' o f az nm A < x5 m L g i g l a 'Eevso,Mtl i lr t - a g §i 8 8 _8858 2 8 3r .# �^=g:?E+ e t a s III „a,#x€aE3/ana= = e2 s P a e; € 5 - 8 d .. °,# - 5 u .#6 "` a : a s i s 3 -i�p€Q- ' F [ . 6 d Fe � g b e• -- ` d e o 'B a ° L„ E _ ry s sry 4 o;ole e m x m s s° - - S a ! ' g� y ill i 6 ,n .'. NR"' B b o d a y �s SII, i C6 ,1 u S t i r ow P mot m z N £ _ E IEEE 6 8 too i C Q' ill 1111 $ 8I ! $ BB ow c ¢ iii HI B 8 6 8 8 6 8 H 3. 111111w 6 8 8 I1 1 I R R Y R e e e WM Mil B B 8 B B B B B B B B B B WO s 8 BB 88 BB 8 8 8 8 B B B 1 g it $ga 8 8 8 8 B B B B B B B B B i g 8 UM B 8 $ B 8 8 8 6 8 E B 8 B ... e S 8 8 88 R R RIZR EEEEE EEE IMO 5 e e e e e e e e e e e e e g aaa g =__ o o No f g g 1 e e e e e e e e e e e e e c 3$N E G f V E f o 1 o y i s f o G F C c 20 o o'b ¢ -fff _ e e . 0 e e . . e e e e e e c a c i m C 0 i < m C Q c o 0 o u F o wo x i S g??c< �" z o o`5> i . . . . . . o o e e o e e <i g g;0 'A $i 6 °e W g a e ° : C f 0 g 3 12 €0 3 mot R e e e e e e e e e e e e e - a _ I. _ Ee i i x r a fkw E.i'= at a:t _:2 'i_. c a i z n g s i= ee { b p F f S 4I.1 ! 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I F. ` \ ! = i _ ! || ; ! 11tt : iii IF; l ( {\ } | ! 111 ; f1 q M J = ! ƒ § ; = i14gE1; g/ ) ) IN i � f4 ! / ; f ! . . . . . , L r 1111P4 Runoff Volume and Curve Number Calculations 1M Enter design storm rainfall depths(in): '1-year storm 2-year storm/10-year storm 3.00 I 360 '/I 5.50 ' Use NOAA Atlas 14(hrtp://hescnws.naao.gov/hdsrisfds/) Y 'Notes(see below): (11 The curve numbers and runoff volumes computed In this spreadsheet for each drainage area are limited in their applicability for determining and demonstrating compliance with water quantity requirements.See VRRM User's Guide and Documentation for additional information - • •• 121 Runoff Volume(RV)for pre-and post-development drainage areas must be in volumetric units(e.g,acre-feet or cubic feet)when using the Energy Balance Equation Runoff measured in watershed- - - - OM inches and shown in the spreadsheet as RV(watershed-inch)can only be used in the Energy Balance Equation when the pm and post-development drainage areas are equal.Otherwise RV(watershed•inch) • -- - - must be multiplied by the drainage area. -----•1131 Adjusted CNs are based on runoff reduction volumes as calculated in D.A tabs.An altemative CN adjustment calculation for Vegetated Roofs is included in BMP specification No.5. ------ --- iiillt Drainage Area Curve Numbers and Runoff Depths* Curve numbers(CN,CNadj)and runoff depths(RV aeaamped)are computed with and without reduction practices. Drainage Area A A Soils B Soils C Soils D Soils Total Area(acres): 1.06 ill Forest/Open Space-undisturbed,protected forest/open Area(acres) 0.00 0.66 0.00 0.00 Runoff Reduction space or reforested land CN 30 55 70 77 Volume(ft): 378 Managed Turf-disturbed,graded for yards or other turf Area(acres) 0.00 0.16 0.00 0.00 to be mowed/managed CN 39 61 74 80 Impervious Cover Area(acres) 0.00 0.24 0.00 0.00 CN 98 98 98 98ifill --- ._ CN(p.A A) 66 1-year storm 2-year storm 10-year storm RVDevalopad(watershed-inch)with no Runoff Reduction* 0.54 0.86 2.08 Om RVDaeelmed(watershed-inch)with Runoff Reduction* 0.45 0.76 1.98 Adjusted CN• 63 ✓ 64 / 65 -/ `See Notes above Drainage Area B A Soils B Soils C Soils D Soils Total Area(acne): 0.50 TOO Forest/Open Space-undisturbed,protected forest/open Area(acres) 0.00 0.22 0.00 0.00 Runoff Reduction space or reforested land CN 30 55 70 77 Volume(ft): 288 Managed Turf-disturbed,graded for yards or other turf Area(acres) 0.00 0.09 0.00 0.00 to be mowed/managed CN 39 61 74 80 Impervious Cover Area(acres) 0.00 0.19 0.00 0.00 - - CN 98 98 98 98 ail CNia.A.a) I n 1-year storm 2-year storm 10-year storm RVDurafoped(watershed-inch)with no Runoff Reduction* 0.81 1.19 2.59 RVoeeelePe4(watershed-inch)with Runoff Reduction* 0.65 1.03 2.43 SW Adjusted CN* 69 ',/ 69 .- 70 `See Notes above Drainage Area C A Soils B Soils C Soils D Soils Total Area(acres): 0.18 Forest/Open Space--undisturbed,protected forest/open Area(acres) 0.00 0.13 0.00 0.00 Runoff Reduction W space or reforested land CN 30 55 70 77 Volume DM: 15 Managed Turf--disturbed,graded for yards or other turf Area(acres) 0.00 0.05 0.00 0.00 to be mowed/managed CN 39 61 74 00 Impervious Cover Area(acres) 0.00 0.00 0.00 0.00 CN 98 98 98 f 98 CN o.A c s7 1-year storm 2-year storm 10-year storm RVoawwped(watershed-inch)with no Runoff Reduction* 0.25 0.45 1.38 RVDe„elaesd(watershed-inch)with Runoff Reduction* 0.22 0.43 1.36 Adjusted CN* 56,.' 56 '',._/ 57 L./ m 'See Notes above • Drainage Area D A Soils B Soils C Soils D Soils Total Area(acres): 0.00 Forest/Open Space--undisturbed,protected forest/open Area(acres) 0.00 0.00 0.00 0.00 Runoff Reduction space or reforested land CN 30 55 70 77 Volume(Rs): 0 Managed Turf--disturbed,graded for yards or other turf Area(acres) 0.00 0.00 0.00 0.00 4INO to be mowed/managed CN 39 61 74 80 - Impervious Cover Area(acres) 0.00 0.00 0.00 0.00 CN 98 98 98 98 - - ---- - - - --- CN(DA 0) I 0 NMI _ 1-year storm 2-year storm 10-year storm RVDev.k,,,(watershed-inch)with no Runoff Reduction* 0.00 0.00 0.00 - - - RVDe„N,,,ad(watershed-inch)with Runoff Reduction* 0.o0 0.00 0.00 • Adjusted CN• D o o - 41St rsr *See Notes above Drainage Area E A Soils B Soils C Soils D Sons Total Area(acres): 0.00 -w. Forest/Open Space—undisturbed,protected forest/open Area(acres) 0.00 0.00 0.00 0.00 _ Runoff Reduction space or reforested land CN 30 55 70 77 _ Volume(ft'): 0 Managed Turf--disturbed, y (acres)ge graded for arils or other turf Area 0.00 0.00 0.00 0.00 to be mowed/managed CN 39 61 74 80 Impervious Cover Area(acres) 0.00 0.00 0.00 O.W CN 98 98 98 99 0 1-year storm 2-year storm 10-year storm MID,..u.d(watershed-inch/with no Runoff Reduction' 0.00 0.00 0.00 (watershed-bleb)with Runoff Reduction' 0.00 0.00 0.00 -- �. Adjusted CN* 0 0 0 *See Notes above IN I I I I I r o. i c 1 a m I o a E' r „ o i a+ v � 0 ra• o a i i 113 O. I Z...' E o. a ▪ a 1- e aa) O. 0 io o 0 .._. - c � o I >. 6 p a a s 1 m m 1- `p c 1 0 .a.. LL o ` I O a c O O E m o I E a E m o a I' `.1 1 m m o I -o z a c x 1- -ES c 3 V I v IS To I o O o O ti b = 0 0 1- 0O '-I O� r VI N N , y I O 0 O g 1 m v O 0 1 m E p a 0 u w y y a I o N N n`. E D E d o y R V C O 0 N L en V W a n .. 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N o EL 0 5 0 N d e a e 0. c I- F- a a m m ► a A m a Y �' N O To cv co - N a ,"-, N ati O co m a r O 3 F O O O O R A F O O a O �d,. N a 10 'I' a L C V C O D D C c o E a �.` j O E o E - o d N o o o a E a. .0 0 0 o a ra a E r o 0 0 o a o 0 0 o J " ro a'' c a p . a p . 0 ~ d I- d 44. CC rn c a., ► T. 4 E x E r 0 0 0 o y t' ''5 0 0 o y 01 u o 0 o r v o 0 o I- 0 a 0 a c haw 2 > 2 > o m o w t � v a a N o N .) V `y H O W 0 o o a o . 0 0 u m .� m E o m o 0 0 n a m E o d O A F d ► 2. F a "� m n .0 0 0 0 m« IC w .4 o r o .0 0 0 0 m a d o 0 O N Q O 0 0 C a = 0 0 0 Q O 0 0 Oo V O d C 4 g u 2 Q Q Q Q G O p p O E s C E S. IV a D W W co a ; ; to E r ^ a O E N ^ E R d t ,C E N W Q Q > 01 , :�. Q Q 7 ► m d r O m Al ► ` '� ! a c0 O V1 ro ► r ~ 9 ra ` d .�.. 6 U N ,O f0 d C U 0R. C 7 U !? j C F N N d N C .O a Q H p 0 O N it 1:1C Q H �? o O C m O a a O a t - J M > O. J GJ a 2 p U o , 0 to E a Z N O p a O y n .. A \ A •fD c u. C in 19 C A To T. >m > •f0 N c W N m \ ` c n 1- . lo- � 0 . 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Section 6. Pollution Prevention Plan. (reference County Code 17-404 and State Regulation 9VAC25-880-70 part II section A.4) A. Plan showing pollution activities and prevention practices ". (Provide a reduced 11x17 copy of a site plan on which all of the following activity locations are clearly marked. Keep this plan up-to-date with ongoing site changes and inspections.) INN Alm RIO Issued— 10/2014 Stormwater Pollution Prevention Plan(SWPPP)Albemarle County irli MA Z � w o0 5 �\ " x��ko J - ON i _i r—. 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Apply permanent or temporary stabilization, sodding and/or mulching to denuded areas in "' accordance with the erosion and sediment control specifications and the general VPDES permit for discharges of stormwater from construction activities. (2) Paving operations —Cover storm drain inlets during paving operations and utilize pollution prevention materials +� such as drip pans and absorbent/oil dry for all paving machines to limit leaks and spills of paving materials and fluids. (3) Concrete washout and cement waste — Direct concrete wash water into a leak-proof container or leak-proof settling basin that is 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. (4) Structure construction,stucco,painting and cleaning—Enclose, cover or berm building material storage areas if susceptible to contaminated stormwater runoff. Conduct painting operations consistent with local air quality and OSHA regulations. Mix paint indoors, in a containment area or in a flat unpaved area. 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. (5) Dewatering operations — Construction site dewatering from building footings or other sources may not be discharged without treatment. Sediment laden or turbid water shall be filtered, settled or similarly treated prior to discharge. (6) Material delivery and storage—Designate areas of the construction site for material delivery and storage. Place near construction entrances,away from waterways,and avoid transport near drainage paths or waterways. (7) Material use during building process—Use materials only where and when needed to complete the construction activity. Follow manufacturer's instructions regarding uses, protective equipment, ventilation, flammability and mixing of chemicals. (8) Solid waste disposal—Designate a waste collection area on the construction site that does not receive a substantial ..N amount of runoff from upland areas and does not drain directly to a waterway. Ensure that containers have lids so they can be covered before periods of rain, and keep containers in a covered area whenever possible. Schedule waste collection to prevent the containers from overfilling. (9) Sanitary waste — Prevent the discharge of sanitary waste by providing convenient and well-maintained portable W. sanitary facilities. Locate sanitary facilities in a convenient location away from waterways. (10) Landscaping operations —Maintain as much existing vegetation as practicable. Apply permanent or temporary stabilization, sodding and/or mulching to denuded areas in accordance with the erosion and sediment control "' specifications and the general VPDES permit for discharges of stormwater from construction activities. Apply nutrients in accordance with manufacturer's recommendations and not during rainfall events. 101111 AIM Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County NMI .. B. Sources of Pollutants, locations,and prevention practices Pollutant,or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Pesticides(insecticides, Minimize use by providing routing fungicides,herbicides, Used in landscaped and turfed areas maintenance and upkeep rodenticides) •Y• Fertilizer Newly seeded areas Follow Erosion and Sediment Contol Specifications Cleaning Solvents Equipment storage/staging areas Minimize equipment cleaning in project limits Asphalt Parking areas and roofs Provide stream buffer and filter strips Concrete Curb and gutter,buiding Use Concrete Washout Area construction Glue,adhesives Building Construction Store in dedicated Material Storage Areas Paints Building Construction Store in dedicated Material Storage Areas Wood Preservatives Building Construction Store in dedicated Material Storage Areas Hydraulic oil/fluids Leaks or broken hoses from Follow Response and Reporting ,., equipment guidelines Gasoline Secondary containment/staging Follow Response and Reporting area guidelines Diesel Fuel Secondary containment/staging Follow Response and Reporting area guidelines C. Sources of Pollutants continued. Common activities and minimum control and prevention practices MOP Pollutant,or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Follow Erosion and Sediment Control Clearing,grading,excavating,and Plan. Dispose of clearing debris at NAM un-stabilized areas Land disturbance area acceptable disposal sites.Seed and mulch,or sod within 7 days of land clearing Cover storm drain inlets and use drip Paving operations Roads and driveways pans and absorbent/oil dry for all paving machines to limit leaks and spills Direct concrete wash water into a Concrete washout and Current location and detail shown leak-proof container or leak-proof cement waste on plan settling basin that is designed so that W.. no overflows can occur Enclose or cover material storage areas. Mix paint indoors in a Structure construction,stucco, containment area or in a flat unpaved painting, and cleaning Structures area.Prevent the discharge of soaps, solvents,detergents and wash water, paint,form release oils and curing compounds. Water shall be filtered,settled or Dewatering operations Dewatering sites shown on plan similarly treated prior to discharge as shown on plan. ,.. Material delivery and storage Designated area shown on plan Designated areas for material delivery and storage. Placed near construction Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Grading& Stabilization Activities Log Date Description of the Date Date Grading p Grading Stabilization Description of the Activity Grading Activity Stabilization Measure ty (includinglocation) Activity Measures Initiated Ceased Initiated (including location) MIN SWPPP Modification& Update Log Modification Description of the Modification/Update Modification Prepared By Date (name&title) ir. WW1 Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Pollutant,or Pollutant Location on site Prevention Practices, •.• Generating Activity Control Measures entrances,away from waterways and drainage paths Material use during building Building areas Follow manufacturer's instructions. process MSDS's attached. Waste collection area will not receive a substantial amount of runoff from upland areas and does not drain directly to a waterway. Containers have lids covered before periods of Current designated container areas rain,or are in a covered area. �.. Solid waste disposal on plan Scheduled collection to prevent overfilling.MATERIALS NOT TO BE BURIED ON-SITE Convenient and well-maintained portable sanitary facilities will be Sanitary waste Current locations shown on plan provided,and located away from waterways or inlets. Such facilities shall be regularly maintained. Apply fertilizers in accordance with Landscaping operations Landscape areas shown on plan manufacturer's recommendations and not during rainfall events To be treated in a sediment basin or Wash Waters Wash areas shown on plan better control as specified on plan. Minimize the discharge of pollutants from equipment and vehicle washing Vehicle and equipment washing Designated areas and details shown Provide containment and filtering for on plan all wash waters per the plan Provide double walled tanks,a lined Fueling Fueling station containment area,drip pans,and spill prevention and cleanup materials. 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. (i:i=_.`i''-d✓ nor s or'➢nwa. er disc_._"ges to occur or your site Keep this p`an 'up-to-date with oogoin.g site cr_Er es and ectirn See 'CCP, 9VA C2,5-880-7,J E forropi �n,, �_stto r ter,� -'��" section � k,k�....�,�as *�5_ �. s�•�_...5�✓�y�.,. d'!scn2.I"ges.) D. Non-stormwater discharges Discharge Pollutants or Pollutant Location on Site Constituents Water used to control Dust Dust On all disturbed areas Uncontaminated Excavation Sediment/silt Buildingfoundations Dewatering Landscape Irrigation Sediment/silt,surface pollutants Areas of new plantings Will, Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Discharge Pollutants or Pollutant Location on Site Constituents SIN E. Persons responsible for pollution prevention practices (Provide the names and contact information for all persons responsible for prevention practices as listed above.) Organization Contact Phone# Address Owner/Operator Kathy Williams 0: (434)972-1816 502 Old Lynchburg Road Region Ten Community Services Fiscal Director M: (434)270-4268 Charlottesville, Virginia 22903 Board,Inc. General Contractor Site Contractor Plan Preparer 0: (434)295-8177 418 East Main Street Waterstreet Studio,LLC Alan Franklin,PE M:(434)531-5544 Charlottesville,Virginia 22902 Third Party Inspector 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. 1. Products will be kept in original containers unless they are not re-sealable. 2. Original specimen labels and material safety data sheets will be kept on file. 3. If surplus product must be disposed of, manufacturer's and/or local and State recommended methods for proper disposal will be followed. 4. Manufacturer's recommended methods for spill cleanup will be clearly posted and site personnel will be made aware of the procedures and the location of information and cleanup supplies. 5. Materials and equipment necessary for spill cleanup will be kept in the material storage area on-site. Equipment and materials may include but not be limited to cleanup kits, brooms, dust pans, mops, rags, gloves, goggles, dirt to contain spill, containment boom, absorbent material (e.g. hay, kitty litter, sand, sawdust)and plastic and metal trash. Respond immediately to all spills, leaks and discharges as follows; Most spills can be cleaned up following manufacturer specifications. Absorbent/oil dry, sealable containers, plastic bags, .o. and shovels/brooms are suggested minimum spill response items that should be available at this location. ls`Priority: Protect all people 2"d Priority: Protect equipment and property 3rd Priority: Protect the environment Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County 1. Check for hazards(flammable material,noxious fumes, cause of spill)—if flammable liquid,turn off engines and nearby electrical equipment. If serious hazards are present leave the area and call 911. LARGE SPILLS ARE LIKELY TO PRESENT A HAZARD. 2. Make Sure the spill area is safe to enter and that it does not pose an immediate threat to health or safety of any person. 3. Stop the spill source. 4. Call co-workers and supervisor for assistance and to make them aware of the spill and potential dangers. .. 5. If possible, stop spill from entering drains(use absorbent or other material as necessary). 6. Stop spill from spreading(use absorbent or other material) 7. If spilled material has entered a storm sewer;contact locality's storm water department. 8. Clean up spilled material according to manufacturer specifications,for liquid spills use absorbent materials and do not flush area with water. 9. Properly dispose of cleaning materials and used absorbent material according to manufacturer specifications. When a spill occurs,the following individuals/agencies shall be considered for notification. Emergency Contacts: Normal Working Hours DEQ Blue Ridge Regional Office(Roanoke) 540-562-6700 �,. DEQ Blue Ridge Regional Office(Lynchburg) 434-582-5120 DEQ Piedmont Regional Office 804-527-5020 DEQ Valley Regional Office 540-574-7800 Albemarle County Water Resource Management(MS4 Program)434-296-5816 Nights,Holidays&Weekends VA Dept. of Emergency Management 804-674-2400 24 Hour Reporting Service Local Contacts Monticello Fire Department (434)295-0836 Albemarle County Police Department (434)971-1583 G. Pollution Prevention Awareness All site personnel and workers will be made aware of the prevention practices and measures contained in this document. Additionally .. all employees and sub-contractors will be given a"walk through"of the site identifying areas of possible pollution and will be shown Erosion and Sediment Controls and Pollution Prevention Practices that are applicable to their assigned job duties.Refresher meetings and"walk throughs"should be conducted on an as needed basis. o.. IOW 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. (Provide detailed measures for any applicabke TM IL) After construction, stormwater runoff will discharge to the stream buffer and floodplain of Moore's Creek via a vegetated lip level spreader.According to the DEQ website,Moore's Creek is on the List of Impaired(Category 5)Waters in 2008* .. for Escherichia coli and Fecal Coliform. The operator shall implement the following items: a) The impaired water(s),approved TMDL(s),and pollutant(s)of concern shall be identified in the SWPPP; b) Permanent and temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; c) Nutrients shall be applied in accordance with manufacturer's recommendations or and approved nutrient management plan and shall not be applied during rainfall events;and d) The applicable SWPPP inspection requirements specified in Part II F 2(of CGP)shall be amended as follows as per Part I B 4 of the CGP: 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 rain events producing 0.25 inches of rain or greater over 24 hours.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. Rainfall Tracking For the purposes of tracking measurable rain events,the operator will reference a rain gauge accessible to the inspection ,.. staff at the project site or at another local site representative of the project location. If a rain gauge is not used,rainfall tracking will be monitored using one of the following links: http://water.weather.gov/precip/ ham://www.nc-climate.ncsu.edu/cronos/ htttp://www.ncdc.noaa.gov/cdo-web/ IWO OKI Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County ilia .® Section 8. Qualified personnel (Provide the name,telephone number, and qualifications of the qualified personnel conducting inspections.) The following personnel are responsible for inspections; Organization Contact Phone# Address Owner/Operator Kathy Williams 0:(434)972-1816 502 Old Lynchburg Road _7 Region Ten Community Services Fiscal Director M: (434)270-4268 Charlottesville,Virginia 22903 Board,Inc. General Contractor Site Contractor Plan Preparer 0:(434)295-8177 418 East Main Street Waterstreet Studio,LLC Alan Franklin,PE M:(434)531-5544 Charlottesville,Virginia 22902 Third Party Inspector smi Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County • Section 9. Signed Certification (Provide certification according to 9VAC25-870-370. For purposes of plan review and approvals, this certification should be the owner of the property, the same signature as appears on the bonds and applications. • Another operator can be designated on the delegation of authority form to follow.) CERTIFICATION i "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: e61bri Il? Mn �? min hi , h, Yl (QSa:lrl'4 int✓' Company: it'�t�Yl T n lil.�'11�1(,(�'li C alt ,) O&rzz .L A C Title: YI �Y 1 1 e C Dr C u'V� S'fYC�( "1 v� SG-irk-CS Signature: Date: g/2M/ 1f Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 10. Delegation of authority. (Provide the persons or positions with authority to sign inspection reports or to modify the stormwater pollution prevention plan. A formal, signed delegation of authority is needed.) Delegation of Authority I, (name), hereby designate the person or specifically described position below to be a duly authorized representative for the purpose of overseeing compliance with environmental requirements, including the Construction General Permit, at the construction site. The designee is authorized to sign any reports,stormwater pollution prevention plans and all other documents required by the permit. (name of person or position) (company) ft. (address) (city, state,zip) (phone) �. By signing this authorization, I confirm that I meet the requirements to make such a designation as set forth in the Construction General Permit (CGP), and that the designee above meets the definition of a "duly authorized representative". Operator Name: Company: Title: Signature: Date. Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County Section 11. General permit copy Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County COMMONWEALTH of VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY General Permit No.: VAR10 Effective Date:July 1, 2014 Expiration Date:June 30, 2019 GENERAL VPDES PERMIT FOR DISCHARGES OF STORMWATER FROM CONSTRUCTION ACTIVITIES AUTHORIZATION TO DISCHARGE UNDER THE VIRGINIA STORMWATER MANAGEMENT PROGRAM AND THE VIRGINIA STORMWATER MANAGEMENT ACT In compliance with the provisions of the Clean Water Act, as amended, and pursuant to the Virginia Stormwater Management Act and regulations adopted pursuant thereto, operators of construction ,.. activities are authorized to discharge to surface waters within the boundaries of the Commonwealth of Virginia, except those specifically named in State Water Control Board regulations that prohibit such discharges. The authorized discharge shall be in accordance with this cover page, Part I - Discharge Authorization and Special Conditions, Part II - Stormwater Pollution Prevention Plan, and Part III - Conditions Applicable to All VPDES Permits as set forth herein. 10.1 i. 00. General Permit No:VAR10 Page 1 of 21 PART I DISCHARGE AUTHORIZATION AND SPECIAL CONDITIONS A. Coverage under this general permit. 11110 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 .iI 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. 10. 4. Impaired waters and TMDL limitation. Discharges of stormwater from construction activities to surface waters identified as impaired in the 2012 § 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit for (i) sediment or a sediment-related parameter (i.e , total suspended solids or turbidity) or(ii) nutrients(i.e , nitrogen or phosphorus) are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a SWPPP that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations In addition, the operator shall implement the following items. General Permit No VAR10 Page 2 of 21 a. The impaired water(s), approved TMDL(s), and pollutant(s) of concern, when applicable, shall be �• identified in the SWPPP; b Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; c. Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events, and d. The applicable SWPPP inspection requirements specified in Part II F 2 shall be amended as follows. (1) Inspections shall be conducted at a frequency of(i) at least once every four business days or (ii) at least once every five business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted on the next business day; and (2) Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to surface waters identified as impaired or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit. 5 Exceptional waters limitation. Discharges of stormwater from construction activities not previously covered under the general permit issued in 2009 to exceptional waters identified in 9VAC25-260-30 A 3 c are not eligible for coverage under this general permit unless the operator implements the following: a. The exceptional water(s)shall be identified in the SWPPP; b. Permanent or temporary soil stabilization shall be applied to denuded areas within seven days MOO after final grade is reached on any portion of the site; c. Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and d. The applicable SWPPP inspection requirements specified in Part II F 2 shall be amended as follows. tor (1) Inspections shall be conducted at a frequency of(i) at least once every four business days or (ii) at least once every five business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 '"'" hours between business days, the inspection shall be conducted on the next business day; and drop (2) Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to exceptional waters 6. There shall be no discharge of floating solids or visible foam in other than trace amounts. C. Commingled discharges Discharges authorized by this general permit may be commingled with other sources of stormwater that are not required to be covered under a state permit, so long as the commingled discharge is in compliance with this general permit. Discharges authorized by a separate "■" state or VPDES permit may be commingled with discharges authorized by this general permit so long as all such discharges comply with all applicable state and VPDES permit requirements. General Permit No.:VAR10 Page 3 of 21 D Prohibition of nonstormwater discharges Except as provided in Parts I A 2, I C, and I E, all discharges covered by this general permit shall be composed entirely of stormwater associated with construction activities.All other discharges including the following are prohibited: 1 Wastewater from washout of concrete, 2. Wastewater from the washout and cleanout of stucco, paint, form release oils, curing compounds, and other construction materials, 3 Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance, 4 Oils, toxic substances, or hazardous substances from spills or other releases; and 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 MINN 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, MIN 5. Potable water sources, including uncontaminated waterline flushings; 6 Routine external building wash down where soaps, solvents or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge; MINN 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 WSW solvents, 11 Uncontaminated excavation dewatering, including dewatering of trenches and excavations that have been filtered, settled, or similarly treated prior to discharge, and 12. Landscape irrigation F Termination of general permit coverage. 1 The operator of the construction activity shall submit a notice of termination in accordance with 9VAC25-880-60 to the VSMP authority after one or more of the following conditions have been met: General Permit No VAR10 Page 4 of 21 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 is responsible. When applicable, long term responsibility and maintenance requirements shall be recorded in the local land records prior to the submission of a notice of termination, '"' b. Another operator has assumed control over all areas of the site that have not been finally stabilized and obtained coverage for the ongoing discharge; c. Coverage under an alternative VPDES or state permit has been obtained; or d. For residential construction only, temporary soil stabilization has been completed and the residence has been transferred to the homeowner 2. The notice of termination should be submitted no later than 30 days after one of the above conditions in subdivision 1 of this subsection is met. Authorization to discharge terminates at midnight on the date that the notice of termination is submitted for the conditions set forth in subdivisions 1 b through �- 1 d of this subsection. Termination of authorizations to discharge for the conditions set forth in subdivision 1 a of this subsection shall be effective upon notification from the department that the provisions of subdivision 1 a of this subsection have been met or 60 days after submittal of the notice of termination, whichever occurs first. 4010 3. The notice of termination shall be signed in accordance with Part III K of this general permit. G Water quality protection. 1. The operator must select, install, implement and maintain control measures as identified in the SWPPP at the construction site that minimize pollutants in the discharge as necessary to ensure that the operator's discharge does not cause or contribute to an excursion above any applicable water quality standard. 2. If it is determined by the department that the operator's discharges are causing, have reasonable potential to cause, or are contributing to an excursion above any applicable water quality standard, the department, in consultation with the VSMP authority, may take appropriate enforcement action and require the operator to' a. Modify or implement additional control measures in accordance with Part II B to adequately address the identified water quality concerns, WWI b. Submit valid and verifiable data and information that are representative of ambient conditions and indicate that the receiving water is attaining water quality standards, or c. Submit an individual permit application in accordance with 9VAC25-870-410 B 3 MOO All written responses required under this chapter must include a signed certification consistent with Part III K. General Permit No..VAR10 444 Page 5 of 21 PART II .. STORMWATER POLLUTION PREVENTION PLAN A stormwater pollution prevention plan (SWPPP) shall be developed prior to the submission of a registration statement and implemented for the construction activity, including any support activity, 44" covered by this general permit. SWPPPs shall be prepared in accordance with good engineering practices. Construction activities that are part of a larger common plan of development or sale and disturb less than one acre may utilize a SWPPP template provided by the department and need not provide a ... separate stormwater management plan if one has been prepared and implemented for the larger common plan of development or sale. The SWPPP requirements of this general permit may be fulfilled by incorporating by reference other plans ..4 such as a spill prevention control and countermeasure (SPCC) plan developed for the site under§311 of the federal Clean Water Act or best management practices (BMP) programs otherwise required for the facility provided that the incorporated plan meets or exceeds the SWPPP requirements of Part II A. All plans incorporated by reference into the SWPPP become enforceable under this general permit. If a plan incorporated by reference does not contain all of the required elements of the SWPPP, the operator must develop the missing elements and include them in the SWPPP. Any operator that was authorized to discharge under the general permit issued in 2009, and that intends to continue coverage under this general permit, shall update its stormwater pollution prevention plan to comply with the requirements of this general permit no later than 60 days after the date of coverage under this general permit. A. Stormwater pollution prevention plan contents.The SWPPP shall include the following items 1 General information. a. A signed copy of the registration statement, if required, for coverage under the general VPDES permit for discharges of stormwater from construction activities, SIM 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), 4111, c. Upon receipt, a copy of the general VPDES permit for discharges of stormwater from construction activities, d. A narrative description of the nature of the construction activity, including the function of the �., project(e.g., low density residential, shopping mall, highway, etc.), e A legible site plan identifying: ""' (1) Directions of stormwater flow and approximate slopes anticipated after major grading activities; (2) Limits of land disturbance including steep slopes and natural buffers around surface waters that will not be disturbed; (3) Locations of major structural and nonstructural control measures, including sediment basins 41111, and traps, perimeter dikes, sediment barriers, and other measures intended to filter, settle, or similarly treat sediment, that will be installed between disturbed areas and the undisturbed vegetated areas in order to increase sediment removal and maximize stormwater infiltration, (4) Locations of surface waters, General Permit No. VAR10 Page 6 of 21 (5) Locations where concentrated stormwater is discharged; (6) Locations of support activities, when applicable and when required by the VSMP authority, including but not limited to (i) areas where equipment and vehicle washing, wheel wash water, and other wash water is to occur; (ii) storage areas for chemicals such as acids, fuels, fertilizers, and other lawn care chemicals; (iii) concrete wash out areas, (iv) vehicle fueling and maintenance areas; (v) sanitary waste facilities, including those temporarily placed on the construction site, and (vi)construction waste storage; and (7) When applicable, the location of the on-site rain gauge or the methodology established in consultation with the VSMP authority used to identify measurable storm events for inspection purposes. 2 Erosion and sediment control plan. a. An erosion and sediment control plan approved by the VESCP authority as authorized under the Erosion and Sediment Control Regulations (9VAC25-840), an "agreement in lieu of a plan" as defined in 9VAC25-840-10 from the VESCP authority, or an erosion and sediment control plan prepared in accordance with annual standards and specifications approved by the department. Any operator proposing a new stormwater discharge from construction activities that is not required to obtain erosion and sediment control plan approval from a VESCP authority or does not adopt department-approved annual standards and specifications shall submit the erosion and sediment control plan to the department for review and approval. ... b. All erosion and sediment control plans shall include a statement describing the maintenance responsibilities required for the erosion and sediment controls used. c. A properly implemented approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department-approved annual standards and specifications,that adequately: (1) Controls the volume and velocity of stormwater runoff within the site to minimize soil erosion, (2) Controls stormwater discharges, including peak flow rates and total stormwater volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion, (3) Minimizes the amount of soil exposed during the construction activity; (4) Minimizes the disturbance of steep slopes; (5) Minimizes sediment discharges from the site in a manner that addresses (i) the amount, frequency, intensity, and duration of precipitation; (ii) the nature of resulting stormwater runoff; and (iii) soil characteristics, including the range of soil particle sizes present on the site, (6) Provides and maintains natural buffers around surface waters, directs stormwater to ,.. vegetated areas to increase sediment removal, and maximizes stormwater infiltration, unless infeasible, (7) Minimizes soil compaction and, unless infeasible, preserves topsoil; (8) Ensures that stabilization of disturbed areas will be initiated immediately whenever any clearing, grading, excavating, or other land-disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 days, and General Permit No .VAR10 wasPage 7 of 21 (9) Utilizes outlet structures that withdraw stormwater from the surface (i.e., above the permanent pool or wet storage water surface elevation), unless infeasible, when discharging ..0 from sediment basins or sediment traps. 3 Stormwater management plan. AIN a. New construction activities. A stormwater management plan approved by the VSMP authority as authorized under the Virginia Stormwater Management Program (VSMP) Regulation (9VAC25- 870), or an "agreement in lieu of a stormwater management plan" as defined in 9VAC25-870-10 from the VSMP authority, or a stormwater management plan prepared in accordance with annual standards and specifications approved by the department. Any operator proposing a new stormwater discharge from construction activities that is not required to obtain stormwater management plan approval from a VSMP authority or does not adopt department-approved .a annual standards and specifications shall submit the stormwater management plan to the department for review and approval. b. Existing construction activities. Any operator that was authorized to discharge under the general s" permit issued in 2009, and that intends to continue coverage under this general permit, shall ensure compliance with the requirements of 9VAC25-870-93 through 9VAC25-870-99 of the VSMP Regulation, including but not limited to the water quality and quantity requirements The SWPPP shall include a description of, and all necessary calculations supporting, all post- MOO construction stormwater management measures that will be installed prior to the completion of the construction process to control pollutants in stormwater discharges after construction operations have been completed. Structural measures should be placed on upland soils to the ... degree possible. Such measures must be designed and installed in accordance with applicable VESCP authority, VSMP authority, state, and federal requirements, and any necessary permits must be obtained. 4 Pollution prevention plan. A pollution prevention plan that addresses potential pollutant-generating activities that may reasonably be expected to affect the quality of stormwater discharges from the construction activity, including any support activity The pollution prevention plan shall: a. Identify the potential pollutant-generating activities and the pollutant that is expected to be exposed to stormwater; b. Describe the location where the potential pollutant-generating activities will occur, or if identified on the site plan, reference the site plan; c. Identify all nonstormwater discharges, as authorized in Part I E of this general permit, that are or ..a 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 1111110 (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 Ill 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 was available); r General Permit No..VAR10 Page 8 of 21 (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); ago (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 10111 inlets or conveyance and directing wash waters to sediment basins or traps, using filtration devices such as filter bags or sand filters, or using similarly effective controls); (5) Direct concrete wash water into a leak-proof container or leak-proof settling basin. The �.. container or basin shall be designed so that no overflows can occur due to inadequate sizing or precipitation. Hardened concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wastes. Liquid concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wash waters and shall not be discharged to surface waters, (6) Minimize the discharge of pollutants from storage, handling, and disposal of construction products, materials, and wastes including (i) building products such as asphalt sealants, copper flashing, roofing materials, adhesives, and concrete admixtures; (ii) pesticides, herbicides, insecticides, fertilizers, and landscape materials, and (iii) construction and domestic wastes such as packaging materials, scrap construction materials, masonry products, timber, pipe and electrical cuttings, plastics, Styrofoam,concrete, and other trash or building materials, (7) Prevent the discharge of fuels, oils, and other petroleum products, hazardous or toxic wastes, and sanitary wastes, and (8) Address any other discharge from the potential pollutant-generating activities not addressed above, and a f Describe procedures for providing pollution prevention awareness of all applicable wastes, including any wash water, disposal practices, and applicable disposal locations of such wastes, to personnel in order to comply with the conditions of this general permit. The operator shall implement the procedures described in the SWPPP 5 SWPPP requirements for discharges to impaired waters, surface waters with an applicable TMDL - wasteload allocation established and approved prior to the term of this general permit, and exceptional waters The SWPPP shall a. Identify the impaired water(s), approved TMDL(s), pollutant(s) of concern, and exceptional waters `""` identified in 9VAC25-260-30 A 3 c, when applicable, b Provide clear direction that: (1) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; .. (2) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events, and (3) A modified inspection schedule shall be implemented in accordance with Part I B 4 or Part I B 5. a General Permit No..VAR10 Page 9 of 21 6. Qualified personnel. The name, phone number, and qualifications of the qualified personnel conducting inspections required by this general permit. 7. Delegation of authority The individuals or positions with delegated authority, in accordance with Part III K, to sign inspection reports or modify the SWPPP. air 8. SWPPP signature. The SWPPP shall be signed and dated in accordance with Part III K. B. SWPPP amendments, modification, and updates. 1 The operator shall amend the SWPPP whenever there is a change in the design, construction, operation, or maintenance that has a significant effect on the discharge of pollutants to surface waters and that has not been previously addressed in the SWPPP 2. The SWPPP must be amended if, during inspections or investigations by the operator's qualified personnel, or by local, state, or federal officials, it is determined that the existing control measures are ineffective in minimizing pollutants in discharges from the construction activity. Revisions to the SWPPP shall include additional or modified control measures designed and implemented to correct problems identified. If approval by the VESCP authority, VSMP authority, or department is necessary for the control measure, revisions to the SWPPP shall be completed no later than seven calendar r.. days following approval. Implementation of these additional or modified control measures must be accomplished as described in Part II G. 3 The SWPPP must clearly identify the contractor(s) that will implement and maintain each control measure identified in the SWPPP The SWPPP shall be amended to identify any new contractor that will implement and maintain a control measure. 4 The operator shall update the SWPPP no later than seven days following any modification to its implementation. All modifications or updates to the SWPPP shall be noted and shall include the following items. a. A record of dates when: (1) Major grading activities occur; (2) Construction activities temporarily or permanently cease on a portion of the site, and (3) Stabilization measures are initiated; .�. b. Documentation of replaced or modified controls where periodic inspections or other information have indicated that the controls have been used inappropriately or incorrectly and where modified as soon as possible, c. Areas that have reached final stabilization and where no further SWPPP or inspection requirements apply; d. All properties that are no longer under the legal control of the operator and the dates on which the operator no longer had legal control over each property; e. The date of any prohibited discharges, the discharge volume released, and what actions were taken to minimize the impact of the release; f Measures taken to prevent the reoccurrence of any prohibited discharge, and g Measures taken to address any evidence identified as a result of an inspection required under Part II F. General Permit No .VAR10 Page 10 of 21 5 Amendments, modifications, or updates to the SWPPP shall be signed in accordance with Part III K. C. Public Notification. Upon commencement of land disturbance, the operator shall post conspicuously a copy of the notice of coverage letter near the main entrance of the construction activity For linear projects, the operator shall post the notice of coverage letter at a publicly accessible location near an active part of the construction project (e.g., where a pipeline crosses a public road) The operator shall maintain the posted information until termination of general permit coverage as specified in Part I F D. SWPPP availability IMO 1 Operators with day-to-day operational control over SWPPP implementation shall have a copy of the SWPPP available at a central location on-site for use by those identified as having responsibilities ... under the SWPPP whenever they are on the construction site. 2. The operator shall make the SWPPP and all amendments, modifications, and updates available upon request to the department, the VSMP authority, the EPA, the VESCP authority, local government '• officials, or the operator of a municipal separate storm sewer system receiving discharges from the construction activity. If an on-site location is unavailable to store the SWPPP when no personnel are present, notice of the SWPPP's location must be posted near the main entrance of the construction site. 3. The operator shall make the SWPPP available for public review in an electronic format or in hard copy. Information for public access to the SWPPP shall be posted and maintained in accordance with Part II C If not provided electronically, public access to the SWPPP may be arranged upon request at a time and at a publicly accessible location convenient to the operator or his designee but shall be no less than once per month and shall be during normal business hours. Information not required to be contained within the SWPPP by this general permit is not required to be released. E. SWPPP implementation. The operator shall implement the SWPPP and subsequent amendments, modifications, and updates from commencement of land disturbance until termination of general permit coverage as specified in Part I F. 1 All control measures must be properly maintained in effective operating condition in accordance with good engineering practices and, where applicable, manufacturer specifications. If a site inspection required by Part II F identifies a control measure that is not operating effectively, corrective action(s) shall be completed as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority, to maintain the continued effectiveness of the control measures. 2. If site inspections required by Part II F identify an existing control measure that needs to be modified or if an additional control measure is necessary for any reason, implementation shall be completed prior to the next anticipated measurable storm event. If implementation prior to the next anticipated measurable storm event is impracticable, then alternative control measures shall be implemented as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority F SWPPP Inspections 1 Personnel responsible for on-site and off-site inspections. Inspections required by this general permit �• shall be conducted by the qualified personnel identified by the operator in the SWPPP The operator is responsible for insuring that the qualified personnel conduct the inspection. 2. Inspection schedule. a. Inspections shall be conducted at a frequency of: General Permit No :VAR10 Page 11 of 21 (1) At least once every five business days; or (2) At least once every 10 business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted no later than the next business day b. Where areas have been temporarily stabilized or land-disturbing activities will be suspended due MOW to continuous frozen ground conditions and stormwater discharges are unlikely, the inspection frequency may be reduced to once per month. If weather conditions (such as above freezing temperatures or rain or snow events) make discharges likely, the operator shall immediately resume the regular inspection frequency c. Representative inspections may be utilized for utility line installation, pipeline construction, or other similar linear construction activities provided that: (1) Temporary or permanent soil stabilization has been installed and vehicle access may compromise the temporary or permanent soil stabilization and potentially cause additional land disturbance increasing the potential for erosion; (2) Inspections occur on the same frequency as other construction activities; (3) Control measures are inspected along the construction site 0.25 miles above and below each IMP access point (i e, where a roadway, undisturbed right-of-way, or other similar feature intersects the construction activity and access does not compromise temporary or permanent soil stabilization), and (4) Inspection locations are provided in the report required by Part II F 3 Inspection requirements a. As part of the inspection,the qualified personnel shall (1) Record the date and time of the inspection and when applicable the date and rainfall amount of the last measurable storm event; (2) Record the information and a description of any discharges occurring at the time of the inspection; .r (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; r. ..Y General Permit No.:VAR10 Page 12 of 21 (d) Cut and fill slopes; m.. (e) Sediment basins and traps, sediment barriers, and other measures installed to control sediment discharge from stormwater; (f) Temporary or permanent channel, flume, or other slope drain structures installed to "" convey concentrated runoff down cut and fill slopes; (g) Storm inlets that have been made operational to ensure that sediment laden stormwater does not enter without first being filtered or similarly treated; and (h) Construction vehicle access routes that intersect or access paved roads for minimizing sediment tracking; (5) Inspect areas that have reached final grade or that will remain dormant for more than 14 days for initiation of stabilization activities, WNW (6) Inspect areas that have reached final grade or that will remain dormant for more than 14 days for completion of stabilization activities within seven days of reaching grade or stopping work; (7) Inspect for evidence that the approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department- approved annual standards and specifications has not been properly implemented. This includes but is not limited to (a) Concentrated flows of stormwater in conveyances such as rills, rivulets or channels that have not been filtered, settled, or similarly treated prior to discharge, or evidence thereof; (b) Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove sediments prior to discharge; (c) Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that discharge to surface waters. Inlets and catch basins with failing sediments controls due to improper installation, lack of maintenance, or inadequate design are considered unprotected; WO (d) Sediment deposition on any property (including public and private streets) outside of the construction activity covered by this general permit; -r (e) Required stabilization has not been initiated or completed on portions of the site, (f) Sediment basins without adequate wet or dry storage volume or sediment basins that allow the discharge of stormwater from below the surface of the wet storage portion of "` the basin; (g) Sediment traps without adequate wet or dry storage or sediment traps that allow the discharge of stormwater from below the surface of the wet storage portion of the trap, and (h) Land disturbance outside of the approved area to be disturbed; NNW (8) Inspect pollutant generating activities identified in the pollution prevention plan for the proper implementation, maintenance and effectiveness of the procedures and practices; W" (9) Identify any pollutant generating activities not identified in the pollution prevention plan, and NNW General Permit No. VAR10 Page 13 of 21 (10) Identify and document the presence of any evidence of the discharge of pollutants prohibited by this general permit. 4 Inspection report. Each inspection report shall include the following items: a. The date and time of the inspection and when applicable, the date and rainfall amount of the last measurable storm event; b Summarized findings of the inspection; 711111 c. The location(s) of prohibited discharges; d The location(s)of control measures that require maintenance, e. The location(s) of control measures that failed to operate as designed or proved inadequate or inappropriate for a particular location; f The location(s)where any evidence identified under Part II F 3 a (7)exists; g. The location(s) where any additional control measure is needed that did not exist at the time of inspection, h. A list of corrective actions required (including any changes to the SWPPP that are necessary) as a result of the inspection or to maintain permit compliance, i Documentation of any corrective actions required from a previous inspection that have not been implemented; and ..� j. The date and signature of the qualified personnel and the operator or its duly authorized representative. The inspection report and any actions taken in accordance with Part II must be retained by the operator as part of the SWPPP for at least three years from the date that general permit coverage expires or is terminated. The inspection report shall identify any incidents of noncompliance. Where an inspection report does not identify any incidents of noncompliance, the report shall contain a certification that the construction activity is in compliance with the SWPPP and this general permit. The report shall be signed in accordance with Part Ill K of this general permit. G. Corrective actions. 1 The operator shall implement the corrective action(s) identified as a result of an inspection as soon as practicable but no later than seven days after discovery or a longer period as approved by the VSMP authority If approval of a corrective action by a regulatory authority (e g , VSMP authority, VESCP authority, or the department) is necessary, additional control measures shall be implemented to minimize pollutants in stormwater discharges until such approvals can be obtained. 2. The operator may be required to remove accumulated sediment deposits located outside of the construction activity covered by this general permit as soon as practicable in order to minimize environmental impacts. The operator shall notify the VSMP authority and the department as well as obtain all applicable federal, state, and local authorizations, approvals, and permits prior to the removal of sediments accumulated in surface waters including wetlands. General Permit No.:VAR10 Page 14 of 21 PART III MIN CONDITIONS APPLICABLE TO ALL VPDES PERMITS NOTE: Discharge monitoring is not required for this general permit. If the operator chooses to monitor stormwater discharges or control measures, the operator must comply with the requirements of subsections A, B, and C, as appropriate. A. Monitoring. ASO 1. Samples and measurements taken for the purpose of monitoring shall be representative of the monitoring activity. 2. Monitoring shall be conducted according to procedures approved under 40 CFR Part 136 or alternative methods approved by the U.S Environmental Protection Agency, unless other procedures have been specified in this general permit. Analyses performed according to test procedures approved under 40 CFR Part 136 shall be performed by an environmental laboratory certified under regulations adopted by the Department of General Services(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 individual(s)who performed the sampling or measurements, c. The date(s) and time(s) analyses were performed, d. The individual(s)who performed the analyses, e. The analytical techniques or methods used; and f The results of such analyses. 2. The operator shall retain records of all monitoring information, including all calibration and •- maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this general permit, and records of all data used to complete the registration statement for this general permit, for a period of at least three years from the date of the sample, measurement, report or request for coverage This period of retention shall be extended automatically during the course of any unresolved litigation regarding the regulated activity or regarding control standards applicable to the operator, or as requested by the board. - C Reporting monitoring results. 1 The operator shall update the SWPPP to include the results of the monitoring as may be performed in accordance with this general permit, unless another reporting schedule is specified elsewhere in this OOP general permit. 2. Monitoring results shall be reported on a discharge monitoring report (DMR), on forms provided, approved or specified by the department; or in any format provided that the date, location, parameter, method, and result of the monitoring activity are included. General Permit No :VAR10 Page 15 of 21 3. If the operator monitors any pollutant specifically addressed by this general permit more frequently than required by this general permit using test procedures approved under 40 CFR Part 136 or using •® other test procedures approved by the U.S Environmental Protection Agency or using procedures specified in this general permit, the results of this monitoring shall be included in the calculation and reporting of the data submitted in the DMR or reporting form specified by the department. — 4. Calculations for all limitations which require averaging of measurements shall utilize an arithmetic mean unless otherwise specified in this general permit. D Duty to provide information The operator shall furnish,within a reasonable time, any information which the board may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this general permit or to determine compliance with this general permit. The board, department, EPA, or VSMP authority may require the operator to furnish, upon request, such plans, specifications, and other pertinent information as may be necessary to determine the effect of the wastes from his discharge on the quality of surface waters, or such other information as may be necessary to accomplish the purposes of the CWA and the Virginia Stormwater Management Act. The operator shall also furnish to the board, department, EPA, or VSMP authority, upon request, copies of records required to be kept by this general permit. E. Compliance schedule reports. Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule of this general permit shall be submitted no later than 14 days following each schedule date F. Unauthorized stormwater discharges. Pursuant to § 62.1-44.5 of the Code of Virginia, except in ,.. compliance with a state permit issued by the department, it shall be unlawful to cause a stormwater discharge from a construction activity G. Reports of unauthorized discharges Any operator who discharges or causes or allows a discharge of sewage, industrial waste, other wastes or any noxious or deleterious substance or a hazardous substance or oil in an amount equal to or in excess of a reportable quantity established under either 40 CFR Part 110, 40 CFR Part 117, 40 CFR Part 302, or§62.1-44.34:19 of the Code of Virginia that occurs during a 24-hour period into or upon surface waters or who discharges or causes or allows a discharge "® that may reasonably be expected to enter surface waters, shall notify the Department of Environmental Quality of the discharge immediately upon discovery of the discharge, but in no case later than within 24 hours after said discovery. A written report of the unauthorized discharge shall be submitted to the department and the VSMP authority within five days of discovery of the discharge The written report shall contain. 1 A description of the nature and location of the discharge, IAN 2. The cause of the discharge, .o. 3 The date on which the discharge occurred, 4. The length of time that the discharge continued; 5 The volume of the discharge, 6 If the discharge is continuing, how long it is expected to continue, 7 If the discharge is continuing,what the expected total volume of the discharge will be, and 8 Any steps planned or taken to reduce, eliminate and prevent a recurrence of the present discharge or any future discharges not authorized by this general permit. General Permit No..VAR10 Page 16 of 21 Discharges reportable to the department and the VSMP authority under the immediate reporting requirements of other regulations are exempted from this requirement. H. Reports of unusual or extraordinary discharges. If any unusual or extraordinary discharge including a "bypass" or"upset," as defined herein, should occur from a facility and the discharge enters or could be expected to enter surface waters, the operator shall promptly notify, in no case later than within 24 hours, the department and the VSMP authority by telephone after the discovery of the discharge. This notification shall provide all available details of the incident, including any adverse effects on aquatic life and the known number of fish killed. The operator shall reduce the report to writing and shall submit it to the department and the VSMP authority within five days of discovery of the discharge in accordance with Part III 12. Unusual and extraordinary discharges include but are not limited to any discharge resulting from MOP 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: 4111111 a. Any unanticipated bypass; and b Any upset that causes a discharge to surface waters. 2. A written report shall be submitted within five days and shall contain: a. A description of the noncompliance and its cause; b The period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and �- c. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance The department may waive the written report on a case-by-case basis for reports of noncompliance under Part III I if the oral report has been received within 24 hours and no adverse impact on surface waters has been reported 3 The operator shall report all instances of noncompliance not reported under Part III 11 or 2 in writing as part of the SWPPP The reports shall contain the information listed in Part III 12. NOTE: The reports required in Part III G, H and I shall be made to the department and the VSMP authority. Reports may be made by telephone, email, or by fax. For reports outside normal working hours, IMP leaving a recorded message shall fulfill the immediate reporting requirement. For emergencies, the Virginia Department of Emergency Management maintains a 24-hour telephone service at 1-800-468- 8892. General Permit No :VAR10 Page 17 of 21 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, a.. 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 OWN 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. dell 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 W"" corporation in charge of a principal business function, or any other person who performs similar policy-making or decision-making functions for the corporation; or(ii) the manager of one or more manufacturing, production, or operating facilities, provided the manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for state permit application requirements, and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures, r. b For a partnership or sole proprietorship by a general partner or the proprietor, respectively; or c. For a municipality, state, federal, or other public agency. by either a principal executive officer or ranking elected official For purposes of this chapter, a principal executive officer of a public agency includes: (i) the chief executive officer of the agency or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency. 2 Reports, etc. All reports required by this general permit, including SWPPPs, and other information requested by the board or the department shall be signed by a person described in Part Ill 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 Ill 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 .r General Permit No VAR10 MOW Page 18 of 21 representative may thus be either a named individual or any individual occupying a named position); and MOW c. The signed and dated written authorization is included in the SWPPP.A copy must be provided to the department and VSMP authority, if requested 3. Changes to authorization. If an authorization under Part III K 2 is no longer accurate because a different individual or position has responsibility for the overall operation of the construction activity, a new authorization satisfying the requirements of Part III K 2 shall be submitted to the VSMP authority as the administering entity for the board prior to or together with any reports or information to be signed by an authorized representative 4. Certification. Any person signing a document under Part III K 1 or 2 shall make the following certification: "I certify under penalty of law that I have read and understand this document and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." L. Duty to comply. The operator shall comply with all conditions of this general permit. Any state permit noncompliance constitutes a violation of the Virginia Stormwater Management Act and the Clean Water Act, except that noncompliance with certain provisions of this general permit may constitute a violation of the Virginia Stormwater Management Act but not the Clean Water Act. Permit noncompliance is grounds for enforcement action, for state permit termination, revocation and reissuance, or modification, or denial of a state permit renewal application. The operator shall comply with effluent standards or prohibitions established under§ 307(a) of the Clean Water Act for toxic pollutants within the time provided in the regulations that establish these standards or prohibitions or standards for sewage sludge use or disposal, even if this general permit has not yet been modified to incorporate the requirement. M. Duty to reapply. If the operator wishes to continue an activity regulated by this general permit after the expiration date of this general permit, the operator shall submit a new registration statement at least 90 days before the expiration date of the existing general permit, unless permission for a later date has been granted by the board. The board shall not grant permission for registration statements to be submitted later than the expiration date of the existing general permit. IMO 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 ,r, 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 aim Control Law or§ 311 of the Clean Water Act. General Permit No VAR10 Page 19 of 21 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 11111111 the operator only when the operation is necessary to achieve compliance with the conditions of this general permit. R. Disposal of solids or sludges. Solids, sludges or other pollutants removed in the course of treatment or management of pollutants shall be disposed of in a manner so as to prevent any pollutant from such materials from entering surface waters and in compliance with all applicable state and federal laws and regulations. S. Duty to mitigate. The operator shall take all steps to minimize or prevent any discharge in violation of this general permit that has a reasonable likelihood of adversely affecting human health or the environment. T Need to halt or reduce activity not a defense It shall not be a defense for an operator in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to „O maintain compliance with the conditions of this general permit. U Bypass. 1. "Bypass," as defined in 9VAC25-870-10, means the intentional diversion of waste streams from any portion of a treatment facility The operator may allow any bypass to occur that does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to ensure efficient operation.These bypasses are not subject to the provisions of Part III U 2 and 3 2. Notice. a. Anticipated bypass If the operator knows in advance of the need for a bypass, the operator shall submit prior notice to the department, if possible at least 10 days before the date of the bypass. b Unanticipated bypass. The operator shall submit notice of an unanticipated bypass as required in 111101 Part III 1 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 MIS 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. AIN General Permit No.'VAR10 1100 Page 20 of 21 b. The department may approve an anticipated bypass, after considering its adverse effects, if the department determines that it will meet the three conditions listed in Part III U 3 a. V Upset. 1 An "upset," as defined in 9VAC25-870-10, means an exceptional incident in which there is unintentional and temporary noncompliance with technology-based state permit effluent limitations because of factors beyond the reasonable control of the operator. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation 2 An upset constitutes an affirmative defense to an action brought for noncompliance with technology- based state permit effluent limitations if the requirements of Part III V 4 are met. A determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance, is not a final administrative action subject to judicial review 3. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation. 4 An operator who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs or other relevant evidence that: a. An upset occurred and that the operator can identify the cause(s)of the upset; b The permitted facility was at the time being properly operated; c. The operator submitted notice of the upset as required in Part III I; and JON d The operator complied with any remedial measures required under Part III S 5 In any enforcement proceeding,the operator seeking to establish the occurrence of an upset has the burden of proof W Inspection and entry The operator shall allow the department as the board's designee, the VSMP .� authority, EPA, or an authorized representative of either entity(including an authorized contractor), upon presentation of credentials and other documents as may be required by law to. 1 Enter upon the operator's premises where a regulated facility or activity is located or conducted, or where records must be kept under the conditions of this general permit; 2. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this general permit; 3 Inspect and photograph at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this general permit; and 4 Sample or monitor at reasonable times, for the purposes of ensuring state permit compliance or as otherwise authorized by the Clean Water Act or the Virginia Stormwater Management Act, any substances or parameters at any location. For purposes of this section, the time for inspection shall be deemed reasonable during regular business hours, and whenever the facility is discharging. Nothing contained herein shall make an inspection unreasonable during an emergency General Permit No.:VAR10 Page 21 of 21 X. State permit actions. State permits may be modified, revoked and reissued, or terminated for cause The filing of a request by the operator for a state permit modification, revocation and reissuance, or termination, or a notification of planned changes or anticipated noncompliance does not stay any state permit condition. Y Transfer of state permits. 1 State permits are not transferable to any person except after notice to the department. Except as provided in Part III Y 2, a state permit may be transferred by the operator to a new operator only if the MIS 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 "`o 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 '"w. 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 Inspections of all Erosion Control, Stormwater Management, and Pollution Protection measures shall be made every five business days and within 24 hrs of a 0.25 inch storm event and recorded on the attached inspection forms. Rainfall Tracking For the purposes of tracking measurable rain events,the operator will reference a rain gauge accessible to the inspection staff at the project site or at another local site representative of the project location. If a rain gauge is not used,rainfall tracking will be monitored using one of the following links: http://water.weather.gov/precip/ http://www.nc-climate.ncsu.edu/cronos/ http://www.ncdc.noaa.gov/cdo-web/ 1111111 NNW SIM Issued— 10/2014 Stormwater Pollution Prevention Plan (SWPPP)Albemarle County ONO Inspection Report Template - Field Version Purpose This Inspection Report Template (or "template") was designed to assist you in preparing inspection reports for .. EPA's 2012 Construction General Permit (CGP). If you are covered under the 2012 CGP,this template will enable you to create an inspection report form that is customized to the specific circumstances of your project and that complies with the minimum reporting requirements of Part 4.1.7 of the permit. Note that the use of this form is optional;you may use your own inspection report form provided it includes the minimum information " required in Part 4.1.7 of the CGP. If you are covered under a state CGP, this template may be helpful in developing a form that can be used for .�. that permit; however it will need to be modified to meet the specific requirements of that permit. If your permitting authority requires you to use a specific inspection report form,you should not use this form. Notes: While EPA has made every effort to ensure the accuracy of all instructions and guidance contained in the Inspection Report Template, the actual obligations of regulated construction activities are determined by the relevant provisions of the permit, not by the template. In the event of a conflict between the Inspection Report Template and any corresponding provision of the 2012 CGP,you must abide by the requirements in the permit. EPA welcomes comments on the Inspection Report Template at any time and will consider those comments in any future revision of this document.You may contact EPA for CGP-related inquiries at cqo@epa.gov. ""• Overview of Inspection Requirements Construction operators covered under the 2012 CGP are subject to the following requirements in Part 4: Inspection Frequency(see Part 4.1 4) You are required to conduct inspections either: • Once every 7 calendar days;or • Once every 14 calendar days and within 24 hours of a storm event of 0.25 inches or greater. Your inspection frequency is increased if the site discharges to a sensitive water.See Part 4.1.3.Your inspection frequency may be decreased to account for stabilized areas,or for arid,semi-arid,or drought-stricken conditions,or for frozen conditions.See Part 4.1.4. ONO Areas That Need to Be Inspected(see Part 4 1.5) During each inspection,you must inspect the following areas of your site: • Cleared,graded,or excavated areas of the site; • Stormwater controls (e.g., perimeter controls, sediment basins, inlets, exit points etc.) and pollution prevention tow practices (e.g., pollution prevention practices for vehicle fueling/maintenance and washing, construction product storage,handling, and disposal,etc.) at the site; • Material,waste,or borrow areas covered by the permit,and equipment storage and maintenance areas; • Areas where stormwater flows within the site; • Stormwater discharge points;and • Areas where stabilization has been implemented. What to Check For During Your Inspection (see Part 4.1.6) During your site inspection,you are required to check: • Whether stormwater controls or pollution prevention practices require maintenance or corrective action, or whether new or modified controls are required; • For the presence of conditions that could lead to spills, leaks,or other pollutant accumulations and discharges; • Whether there are visible signs of erosion and sediment accumulation at points of discharge and to the channels and streambanks that are in the immediate vicinity of the discharge; • If a stormwater discharge is occurring at the time of the inspection, whether there are obvious, visual signs of pollutant discharges;and • If any permit violations have occurred on the site. Inspection Reports(see Part 4 1.7) '•'� Within 24 hours of completing each inspection,you are required to complete an inspection report that includes: • Date of inspection; • Names and titles of persons conducting the inspection; aro • Summary of inspection findings; • Rain gauge or weather station readings if your inspection is triggered by the 0.25 inch storm threshold;and • If you determine that a portion of your site is unsafe to access for the inspection, documentation of what conditions i.m prevented the inspection and where these conditions occurred on the site Instructions for Using This Template This Field Version of the Inspection Report Template is intended to be used in the field and filled out by hand. If a•• you will be filling out the Inspection Report Template electronically (i.e.,you will be typing in your findings), please use the Electronic Version of the Inspection Report Template available at www.era.gov/nodes/stormwater/swppp.The Electronic Version includes text fields with instructions for what to «.. enter. Keep in mind that this document is a template and not an "off-the-shelf" inspection report that is ready to use without some modification.You must first customize this form to include the specifics of your project in order for +W it to be useable for your inspection reports. Once you have entered all of your site-specific information into these fields,you may print out this form for use in the field to complete inspection reports. W The following tips for using this template will help you ensure that the minimum permit requirements are met: • Review the inspection requirements. Before you start developing your inspection report form,read the CGP's Part 4 inspection requirements. This will ensure that you have a working understanding of the permit's underlying inspection requirements. 4.0 • Complete all required text fields. Fill out all text fields. Only by filling out all fields will the template be compliant with the requirements of the permit. (Note: Where you do not need the number of rows ®,, provided in the template form for your inspection,you may leave those rows blank. Or,if you need more space to document your findings, you may add an additional sheet.) • Use your site map to document inspection findings. In several places in the template, you are directed •,,,. to specify the location of certain features of your site,including where stormwater controls are installed and where you will be stabilizing exposed soil. You are also asked to fill in location information for unsafe conditions and the locations of any discharges occurring during your inspections. Where you are asked for location information, EPA encourages you to reference the point on your SWPPP site map that •' corresponds to the requested location on the inspection form. Using the site map as a tool in this way will help you conduct efficient inspections,will assist you in evaluating problems found, and will ensure proper documentation. WIN • Sign and certify each inspection report. Each inspection report must be signed and certified by the permittee to be considered complete. Where your inspections are carried out by a contractor or subcontractor,it is recommended that you also have the form signed and certified by the inspector,in .. addition to the signature and certification required of the permitted operator.The template includes a signature block for both parties. • Include the inspection form with your SWPPP. Once your form is complete, make sure to include a copy .. of the inspection form in your SWPPP in accordance with Part 7.2.12.4 of the CGP. • Retain copies of all inspection reports with your records.You must also retain in your records copies of all inspection reports in accordance with the requirements in Part 4.1.7.3 of the 2012 CGP.These reports ..o. must be retained for at least 3 years from the date your permit coverage expires or is terminated. Section-by-Section Instructions You will find specific instructions corresponding to each section of the report form on the reverse side of each •`" page.These instructions provide you with more details in terms of what EPA expects to be documented in these reports. Wm NW Ln IOW § / \ Co 2 ) Mir 5 / -o o 2 c v. .2 \ 0 O- a \ _ ■ \ k ` o \ 2 \ ƒ C o. c o o \ _ \ \ 2 5 \ z { c 0 0 p § 0 0 _ 0 o0 = \ { \ _ £ 2 0 0 \ - § $ = o - - _ 7 .2 gg \ u t 2 C r 0 2 ® / 0 \ ) 2 » kg 6 c % 2 0 \ E D e .c t . 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U O U 0 6 p a) . a) . c 6 ° 05 aa)) HQ m - r 6.1110 NIP Corrective Action Report Form - Field Version Purpose This Corrective Action Report Form is designed to assist you in preparing corrective action reports for EPA's 2012 Construction General Permit (CGP). If you are covered under EPA's 2012 CGP,this form will enable you to create a corrective action report that complies with the minimum reporting requirements of Part 5.4 of the permit. .. You are only required to fill out this form if one of the corrective action triggering conditions in Part 5.2.1 or 5.3 occurs on your site. Routine maintenance and repairs are generally not considered to be a corrective action triggering condition. Corrective actions are triggered only for specific, more serious conditions that are identified below in the "Overview of Corrective Action Requirements." If you are covered under a state CGP, this form may be helpful in developing a report that can be used for that permit; however it will need to be modified to meet the specific requirements of the permit. If your permitting IMO authority requires you to use a specific corrective action report form, you should not use this form. Notes While EPA has made every effort to ensure the accuracy of all instructions and guidance contained in the Corrective Action Report Form, the actual obligations of regulated construction activities are determined by the relevant provisions of the permit, not by the form. In the event of a conflict between the Corrective Action Report Form and any corresponding provision of the 2012 CGP,you must abide by the requirements in the permit. EPA welcomes comments on the Corrective Action Report Form at any time and will consider those comments in any future revision of this document. You may contact EPA for CGP-related inquiries at cgp@epa.gov. .. Overview of Corrective Action Requirements Construction operators covered under the 2012 CGP are required to conduct corrective actions and report on progress made in correcting the problem condition(s) in accordance with the following requirements: Corrective Action Triggering Conditions(Parts 5.2.1 and 5.3) Corrective action is required whenever any of the following conditions occur at your site: • A required stormwater control was never installed,was installed incorrectly,or not in accordance with the ••, requirements in Part 2 and/or 3; • The stormwater controls (e.g.,erosion and sediment controls or pollution prevention controls) that have been installed and maintained are not effective enough for the discharge to meet applicable water quality standards or applicable requirements in Part 3.1 of the permit; • A Part 2.3.1 prohibited discharge has occurred or is occurring;or • Any corrective actions required by EPA as a result of permit violations found during an inspection carried out under Part 4.2. " Deadlines for Completing Corrective Actions(Part 5.2.1) You must complete corrective action (e.g.,installing and making operational any new or modified control, correcting errors in installation,preventing,mitigating, or cleaning up spills or leaks making repairs) by no later than 7 calendar days from the time of discovery of the condition. If infeasible to complete the installation or repair within 7 calendar days,you must document why it is infeasible and document your schedule for completing the corrective action as soon as practicable. Deadlines for Documenting Corrective Actions in a Report(Part 5.4) You are required to complete a corrective action report for each of corrective action you take in accordance with the following deadlines. • Within 24 hours of discovering the occurrence of a corrective action triggering condition,you must document the following: - The condition identified at your site; •M -• - The nature of the condition identified;and - The date and time of the condition identified and how it was identified • Within 7 calendar days of discovering a triggering condition,you must document the following: Mar - Any follow-up actions taken to review the design, installation,and maintenance of stormwater controls, including the dates such actions occurred; - A summary of stormwater controls modifications taken or to be taken,including a schedule of activities necessary to implement changes,and the date the modifications are completed or expected to be '• completed;and - Notice of whether SWPPP modifications are required as a result of the condition identified or corrective action. Instructions for Using This Report Form This Field Version of the Corrective Action Report Form is intended to be used in the field and filled out by hand. If you will be filling out the Corrective Action Report Form electronically (i.e.,you will be typing in your findings), please use the Electronic Version of the Corrective Action Report Form available at www.epa.gov/npdes/stormwater/swppp.The Electronic Version includes text fields with instructions for what to enter. The following tips for using this form will help you ensure that the minimum permit requirements are met: • Review the corrective action requirements. Before you fill out this corrective action report form, read the CGP's Part 5 corrective action requirements.This will ensure that you have a working understanding of the permit's underlying corrective action requirements. • Complete a separate report for each condition that triggers corrective action. For each triggering condition on your site,you will need to fill out a separate corrective action report form. • Complete all required text fields. Fill out all text fields. Only by filling out all fields will the form be compliant with the requirements of the permit. (Note: Where you do not need the number of rows provided in the corrective action report form, you leave those rows blank. Or, if you need more space to document your findings, you may add an additional sheet.) • Sign and certify each corrective action report. Each corrective action report form must be signed and certified by the permittee to be considered complete. Where your corrective actions are carried out by a contractor or subcontractor, it is recommended that you also have the form signed and certified by the +•. inspector, in addition to the signature and certification required of the permitted operator.The form includes a signature block for both parties. • Include the corrective action report form with your SWPPP. Once your form is complete, make sure to •• include a copy of the corrective action report form in your SWPPP in accordance with Part 7.2.12.4 of the CGP. • Retain copies of all corrective action reports with your records. You must retain copies of your corrective •• action reports in your records in accordance with the requirements in Part 5.4.4 of the 2012 CGP.These reports must be retained for at least 3 years from the date your permit coverage expires or is terminated. r.. Section-by-Section Instructions You will find specific instructions corresponding to each section of the report form on the reverse side of each page.These instructions were written in order to provide you with more details in terms of what EPA expects to be documented in these reports. ii 1.11111 Section A-Initial Report(CGP Part 5.4.1) (Com lete this section within 24 hours of discovering the condition that triggered corrective action) Name of Project -TCGP Tracking No. Today's Date es, Date Problem First Discovered Time Problem First Discovered Name and Contact Information of Individual Completing this Form What site conditions triggered the requirement to conduct corrective action(check the box that applies): ❑ A required stormwater control was never installed,was installed incorrectly,or not in accordance with the requirements in Part 2 and/or 3 ❑ The stormwater controls that have been installed and maintained are not effective enough for the discharge to meet applicable water quality standards or applicable requirements in Part 3.1 of the permit ❑ A Part 2.3.1 prohibited discharge has occurred or is occurring ❑ EPA requires corrective action as a result of permit violations found during an EPA inspection carried out under Part 4.2 Provide a description of the problem: Deadline for completing corrective action (Enter date that is either: (1) no more than 7 calendar days after the date you discovered the problem, or(2) if it is infeasible to complete work within the first 7 days, enter the date that is as soon as ,.. practicable following the 7th day): If your estimated date of completion falls after the 7-day deadline,explain(1)why you believe it is infeasible to complete work within 7 days,and(2)why the date you have established for making the new or modified stormwater control operational is the soonest practicable timeframe: Section B-Corrective Action Progress (CGP Part 5.4.2) (Complete this section no later than 7 calendar days after discovering the condition that triggered corrective action) Section B.1 -Why the Problem Occurred Cause(s)of Problem How This Was Determined and the Date You Determined (Add an additional sheet if necessary) the Cause 1. 1. 2. 2. Section B.2-Stormwater Control Modifications to be Implemented to Correct the Problem List of Stormwater Control Modification(s) Date of SWPPP Update Notes Needed to Correct Problem Completion Necessary? (Add an additional sheet if necessary) 1. ❑Yes ❑No If yes, provide date SWPPP modified: �.. 2. ❑Yes ❑No If yes, provide date SWPPP modified: •■ Page 1 of 2 Instructions for Filling Out the Initial Report(Section A) You must complete Section A of the report form within 24 hours of discovering the condition that triggered corrective action Name of Project Enter the name for the project. CGP Tracking No. Enter the tracking number that was assigned to your NOI application for permit coverage. Today's Date Enter the date you completed this form. Date/Time Problem First Discovered ,r. Specify the date on which the triggering condition was first discovered.Also specify the time of the discovery Name/Contact Information Provide the individual's name,title, and contact information as directed in the form. Site Condition That Triggered Corrective Action Under the CGP, corrective action is required when one of 3 triggering conditions occurs at your site.See CGP Parts 5.2.1 and 5.3.Check the box that corresponds to the condition that triggered this corrective action. SNP Description of the Site Condition Provide a summary description of the condition you found that triggered corrective action under CGP Part 5.2.1 and the specific location where it was found. Be as specific as possible about the location;it is recommended that you refer to a `le precise point on your site map. If you have already provided this explanation in an inspection report,you can refer to that report. Deadline for Completing Corrective Action �r This deadline is fixed in CGP Part 5.2.1.For all projects,the deadline is either: (1) no more than 7 calendar days after the date you discovered the problem,or(2) if it is infeasible to complete work within the first 7 days, as soon as practicable following the 7th day. If your estimated date of completion falls after the 7-day deadline consistent with (2),above, explain (a) why you believe it is infeasible to complete work within 7 days, and (b) why the date you have established for making the new or modified stormwater control operational is the soonest practicable timeframe: WWII Instructions for Filling Out the Corrective Action Progress Table(Section B) You must complete Section B of the report form no later than 7 calendar days after discovering the condition that triggered corrective action. Section B.1 -Why the Problem Occurred After you have had the opportunity to examine the problem more closely, provide details as to what you believe to be the cause of the problem, and specify the follow-up actions you took (along with the dates of such actions) to diagnose "" the problem.This is consistent with CGP Part 5.4.2.1. Section B.2-Stormwater Control Modifications to be Implemented Provide a list of modifications you plan to make to your stormwater controls to correct the problem and the date you completed such work.Keep in mind that your work must be completed within the timeline specified in Section A for the completion of corrective action work. .. Also,if a SWPPP modification is necessary consistent with Part 7.4.1.1 in order to reflect changes implemented at your site,indicate the date you modified your SWPPP. Keep in mind that SWPPP changes must be made within 7 days of discovering the problem that triggered this corrective action. ,.. Space is provided for you to include additional notes or observations regarding the change that you implemented at your site to correct the problem. Section C-Certification and Signature(CGP Part 5.4.3) Section C.1 -Certification and Signature by Contractor or Subcontractor "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for "" gathering the information,the information submitted is, to the best of my knowledge and belief,true,accurate, and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for knowing violations." Signature of Contractor or Subcontractor: Date: Printed Name and Affiliation: i.i lee Section C.2-Certification and Signature by Permittee "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate, and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for knowing violations." Signature of Permittee or "Duly Authorized Representative": Date: Printed Name and Affiliation: ate NEP OOP NMI .w Page 2 of 2 OM WOO Notice of Termination General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10) (Please Type or Print All Information) 1. Construction Activity Operator: Name: Contact: Mailing Address: City. State: Zip Phone: Email address(if available): 2. Name and Location of the Construction Activity: (As listed on the Registration Statement.) Name �r. Address(if available): City. State. Zip NMI County(if not located within a City): Latitude(decimal degrees): Longitude(decimal degrees): 3. General Permit Registration Number: 4. Reason for Terminating Coverage Under the General Permit: (The operator shall submit a Notice of Termination after one or more of the following conditions have been met.) ❑ A. Necessary permanent control measures included in the SWPPP for the site are in place and functioning effectively and final stabilization has been achieved on all portions of the site for which the operator is responsible. 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 notice of termination, Amp ❑ B Another operator has assumed control over all areas of the site that have not been finally stabilized and obtained coverage for the ongoing discharge, �+ ❑ C Coverage under an alternative VPDES or state permit has been obtained;or ❑ D For residential construction only,temporary soil stabilization has been completed and the residence has been transferred to the homeowner The notice of termination should be submitted no later than 30 days after one of the above conditions being met. Authorization to discharge terminates at midnight on the date that the notice of termination is submitted for the conditions set forth in subsections B through D above, unless otherwise notified by the VSMP authority or the Department. Termination of authorizations to discharge for the conditions set forth in subsection A above shall be effective upon notification from the Department that the provisions of subsection A have been met or 60 days after submittal of the notice of terminations, whichever occurs first. 5. Permanent Control Measures Installed: (When applicable, a list of the on-site and off-site permanent control measures (both structural and nonstructural)that were installed to comply with the stormwater management technical criteria.Attach a separate list if additional space is needed.) Permanent Control Measure#1 ,., Type of Permanent Control Measure Date Functional: Address(if available): ere City. State Zip County(if not located within a City): Latitude(decimal degrees). Longitude(decimal degrees): Receiving Water Total Acres Treated: Impervious Acres Treated: 01/2014 Page 1 of Permanent Control Measure#2 "' Type of Permanent Control Measure Date Functional: ®,r Address(if available): City State Zip County(if not located within a City): Latitude(decimal degrees). Longitude(decimal degrees): Receiving Water Total Acres Treated: Impervious Acres Treated: Permanent Control Measure#3 Type of Permanent Control Measure Date Functional' Address(if available)• City State Zip County(if not located within a City): Latitude(decimal degrees): Longitude(decimal degrees): Receiving Water — Total Acres Treated: Impervious Acres Treated. 6. Participation in a Regional Stormwater Management Plan: (When applicable, information related to the participation in a regional stormwater management plan Attach a separate list if additional space is needed.) "" Regional Stormwater Management Facility Type of Regional Stormwater Management Facility Address(if available): City State Zip. County(if not located within a City): Latitude(decimal degrees): Longitude(decimal degrees). Total Site Acres Treated: Impervious Site Acres Treated: 7. Perpetual Nutrient Credits: (When applicable, information related to perpetual nutrient credits that were acquired in accordance with§62.1-44 15 35 of the Code of Virginia.Attach a separate list if additional space is needed.) Nonpoint Nutrient Credit Generating Entity Mel Name Perpetual Nutrient Credits Acquired(lbs/acre/year) — 8. Certification: "I certify under penalty of law that I have read and understand this Notice of Termination 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, sir accurate, and complete. I am aware that there are significant penalties for submitting false information including the possibility of fine and imprisonment for knowing violations." Printed Name. Title Signature Date (Please sign in INK. This Certification must be signed by the appropriate person associated with the operator identified in Item#1.) 01/2014 Page 2 of 2 MIN Instructions for Completing the Notice of Termination General VDPES Permit for Discharges of Stormwater from Construction Activities (VAR1O) GENERAL b. The date that the permanent control measure became functional A Notice of Termination must be submitted when an operator no longer as a post-development stormwater management control; wishes to be covered under the General VPDES Permit for Discharges of Stormwater from Construction Activities(VAR10). c. The street address (if available), City or County (if not located within a City)of the permanent control measure; .or All Notice of Terminations should be submitted to: d. The latitude and longitude in decimal degrees of the approximate Department of Environmental Quality center of the permanent control measure; Office of Stormwater Management,10th Floor P.O.Box 1105 e.The receiving water of the permanent control measure;and Richmond,VA 23218 f The number of total and impervious acres treated by the LINE-BY-LINE INSTRUCTIONS permanent control measure(to the nearest one-tenth of an acre). Item 1: Construction Activity Operator Information. Attach a separate list if additional space is needed. Provide the legal name(do not use a colloquial name),contact,mailing Item 6: Participation in a Regional Stormwater Management Plan address, telephone number, and email address (if available) of the (when applicable). construction activity operator that was issued general permit coverage. For each Regional Stormwater Management Facility provide the Item 2: Name and Location of the Construction Activity following information: Information. a.The type of regional facility to which the site contributes; Provide the official name,street address(if available),city or county(if not located within a City)of the construction activity Also,provide the b. The street address (if available), City or County (if not located latitude and longitude in decimal degrees of the approximate center of within a City)of the regional facility; the construction activity (e.g., N 37.5000, W 77.5000). NOTE. This information can be obtained from the previously submitted Registration c. The latitude and longitude in decimal degrees of the approximate ale Statement. center of the regional facility;and Item 3:General Permit Registration Number. d. The number of total and impervious site acres treated by the regional facility(to the nearest one-tenth of an acre). Provide the existing general permit registration number for the construction activity identified in Item 2. Attach a separate list if additional space is needed. Item 4:Reason for Termination. Item 7:Perpetual Nutrient Credits(when applicable). .. Indicate the appropriate reason for submitting this Notice of Provide the following information related to perpetual nutrient credits Termination. The Notice of Termination may only be submitted after that were acquired in accordance with§62.1-44 15:35 of the Code of one or more of the following conditions have been met: Virginia: a. Necessary permanent control measures included in the SWPPP a. The name of the nonpoint nutrient credit generating entity from r for the site are in place and functioning effectively and final which perpetual nutrient credits were acquired;and stabilization has been achieved on all portions of the site for which the operator is responsible.When applicable,long-term responsibility b. The number of perpetual nutrient credits acquired (lbs. per acre and maintenance requirements for permanent control measures shall per year). be recorded in the local land records prior to the submission of a 'i" notice of termination; Attach a separate list if additional space is needed. b. Another operator has assumed control over all areas of the site Item 8:Certification. that have not been finally stabilized and obtained coverage for the ongoing discharge; A properly authorized individual associated with the operator identified in Item 1 of the Registration Statement is responsible for certifying and c. Coverage under an altemative VPDES or state permit has been signing the Registration Statement. Please sign the Registration obtained;or Statement in INK. d. For residential construction only, temporary soil stabilization has State statutes provide for severe penalties for submitting false been completed and the residence has been transferred to the information on the Registration Statement. State regulations require homeowner that the Registration Statement be signed as follows: The Notice of Termination should be submitted no later than 30 days a. For a corporation: by a responsible corporate officer For the after one of the above conditions being met. purpose of this part,a responsible corporate officer means: Item 5:Permanent Control Measures(when applicable). (i) A president, secretary, treasurer, or vice-president of the r. For each on-site and off-site permanent control measure both corporation in charge of a principal business function,or any other lar structural and non-structural) that was installed to comply with the functionswhoperson for the corporation performs ,or policy-making or decision-making stormwater management technical criteria provide the following information: (ii) the manager of one or more manufacturing, production, or a.The type of permanent control measure; operating facilities, provided the manager is authorized to make management decisions that govern the operation of the regulated 01/2014 Page 1 of 2 facility including having the explicit or implicit duty of making major ®•• capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations;the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. b. For a partnership or sole proprietorship: by a general partner or the proprietor,respectively c. For a municipality,state,federal, or other public agency by either a principal executive officer or ranking elected official.For purposes r.. of this part,a principal executive officer of a public agency includes: (i)The chief executive officer of the agency,or (ii) A senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency ®r r.. ■r rrr 01/2014 Page 2 of 2 �•• Instructions for Signature and Certification(Section C) Each corrective action report must be signed and certified to be considered complete. ,.. Section C.1 -Contractor or Subcontractor Signature and Certification Where a contractor or subcontractor is relied on to complete this report and the associated corrective action,you should require the individual(s) to sign and certify each report. Note that this does not relieve you of the requirement to sign and certify the report as well. ..r Section C.2-Signature and Certification by Permittee At a minimum, the corrective action report form must be signed by either(1) the person who signed the NOI, or(2) a duly authorized representative of that person.The following requirements apply to scenarios (1) and (2): If the signatory will be the person who signed the NOI for permit coverage, as a reminder,that person must be one of the following types of individuals: • Fora corporation:A responsible corporate officer. For the purpose of this subsection,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-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 which 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 environmental compliance with environmental laws and regulations;the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements;and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. • sole proprietorship:A general partner or the proprietor,respectively. For a partnership or • For a municipality, - state, federal,or other public agency: Either a principal executive officer or ranking elected official. For purposes of this subsection, a principal executive officer of a federal 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 (e.g., Regional Administrator of EPA). wr If the signatory will be a duly authorized representative,the following requirements must be met: iss • The authorization is made in writing by the person who signed the NOI (see above); • 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 company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position);and • The signed and dated written authorization is included in the SWPPP.A copy must be submitted to EPA,if requested. rr rw