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HomeMy WebLinkAboutSW7130603_CURRENT PERMIT_20130619STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW 7�Q� DOC TYPE f7OCURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD QUA NCDENR North Carolina Department of Environment and Division of Water Quality Pat McCrory Thomas A. Reeder Natural Resources John E. Skvarla, III Governor Acting Director Secretary June 19, 2013 Mr. Dominick F. Piccolomini Virginia Electric and Power Co. (Dominion NC Power) 701 East Carry Street, 12th Floor Richmond, VA 23219 Subject: Stormwater Permit No. SW7130603 Dominion North Carolina Power—Winfall Substation High Density Project Perquimans County Dear Mr. Piccolomini: The Washington Regional Office received a complete Stormwater Management Permit Application for Dominion North Carolina Power — Winfall Substation on June 6, 2013 and additional information on June 18, 2013. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Session Law 2008-211 and Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7130603 dated June 19, 2013, for the construction of the subject project. This permit shall be effective from the date of issuance until June 19, 2021, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any.parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within sixty (60) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Samir Dumpor, or me at (252) 946-6481. Sincerely, /- Thomas Reeder Division of Water Quality AA/sd: K:\SD\Permits - Sand Filter\SW7130603 cc: Chris Soldan, ARCADIS-US (1100 Welborne Dr., Suite 100, Richmond, VA 23229) erquimans County Building Inspections Washington Regional Office North Carolina Division of Water Quality Internet: www.newateroualilv.ore 943 Washington Square Mall Phone: 252-946-6481 One Washington, NC 27889 FAX 252-946-9215 NorthCarolina An Equal Opportunity/Affirmative Action Employer— 50%Recyded110% Post Consumer Paper NQt{1{µAll _A i State Stormwater Management Systems Permit No. SW7130603 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Virginia Electric and Power Co. (Dominion North Carolina Power) Dominion North Carolina Power— Winfall Substation Perquimans County FOR THE construction, operation and maintenance of one (1) open sand filter with an underdrain in compliance with the provisions of Session Law 2008-211 and 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until June 19, 2021, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.7 on page 3 of this permit. The stormwater control has been designed to handle the runoff from 8,907 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated in Section 1.7 of this permit, and as shown on the approved plans. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 6. The built -upon areas associated with this project shall be located at lest 50 feet landward of all surface waters. Page 2 of 7 State Stormwater Management Systems Permit No. SW7130603 The following design criteria have been permitted for the sand filter(s) and must be provided and maintained at design conditions: a. Drainage Area, ft2: b. Total Impervious Surfaces, ft2: C. Design Storm, inces: d. Design Volume, ft : e. Adjusted Water Quality Volume, ft3: f. Provided Storage Volume, ft g. Sediment Chamber Surface Ary, ft2: h. Sand Chamber Surface Area, ft i. Predevelopment 1 year 24 hour: j. Post -development 1 year 24 hour: k. Top / Bypass Weir Elevation, FMSL: I. Bottom of Sand Filter Elevation, FMSL M. Seasonal High Water Table, FMSL: n. Receiving Stream/River Basin: o. Stream Index Number: P. Classification of Water Body: It. SCHEDULE OF COMPLIANCE 2. 4. 7 15,995 8,907 1.5 1,102 826 2,390 280 1,500 0.24 0.26 13.75 12.25 10.84 UT to Mill Creek / Pasquotank 30-6-5-(2) "SC" The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowin.9 and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, infiltration media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. Records of maintenance activities must be kept for each permitted BMP. The reports will indicate the date, activity, name of person performing the work and what actions were taken. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from Page 3 of 7 State Stormwater Management Systems Permit No. SW7130603 an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. Access to the stormwater facilities shall be maintained via appropriate easements at all times. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, forwhich Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable to any person or entity except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a completed Name/Ownership Change form to the Division of Water Quality, signed by both parties, and accompanied by the appropriate documentation as listed on page 2 of the form. The approval of this request will be considered on its merits and may or may not be approved. 2. The permittee is responsible for compliance with all permit conditions until such time as the Division approves any transfer request. 3. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 4. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 5. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including Page 4 of 7 State Stormwater Management Systems Permit No. SW7130603 those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 6. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 7. The permit issued shall continue in force and effect until revoked or terminated. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 8. Unless specified elsewhere, permanent seeding requirements for the stormwater controls must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 9. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 10. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules and regulations contained in Session Law 2008-211, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et. al. 11. The permittee shall notify the Division in writing of any name, ownership or mailing address changes at least 30 days prior to making such changes. 12. This permit shall be effective from the date of issuance until June 19, 2021. Application for permit renewal shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by the processing fee. Permit issued this the 19th day of JUne, 2013. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Division of Wate�JrQuality v By Authority of the Environmental Management Commission Permit No. SW7130603 Page 5 of 7 State Stormwater Management Systems Permit No. SW7130603 Dominion North Carolina Power — Winfall Substation Stormwater Permit No. SW7130603 Perquimans County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 6 of 7 State Stormwater Management Systems Permit No. SW7130603 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The bypass structure weir elevation is per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short- circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Regional Office Perquimans County Building Inspections Page 7 of 7 W>'�C_) DWQ USE. ONLY -, Date Received Fee Paid Permit Number -0 - I3 �o Applicable Rules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph II - Post Construction (select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ M mt Plan: State of North Carolina R E C E I V E Department of Environment and Natural Resources Division of Water Quality JUN - 6 2013 STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be platocopied for use as an original (� I. GENERAL INFORMATION ���Fi `b —WAR0 1. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Dominion North Carolina Power - Winfall Substation 2. Location of Project (street address): City:Winfall County:Perquimans 3. Directions to project (from nearest major intersection): From the intersection of Two Mile Desert Road and Main St, proceed north 1 /4 mile The site is on the right 4. Latitude:360 13' 22" N Longitude:-760 2743" W of the main entrance to the project. If. PERMIT INFORMATION: 1. a. Specify whether project is (check one): ®New ❑Modification ❑ Renewal w/ Modificationt tRenewals with modifications also requires SWLI-102 - Renewal Application corn b.1f this application is being submitted as the result of a modification to an existing permit, list the existing permit number , its issue date (if known) and the status of construction: ❑Not Started ❑Partially Completed* ❑ Completed* *provide a designer's certification 2. Specify the type of project (check one): ❑Low Density ®High Density ❑Drains to an Offsite Stormwater System ❑Other 3. If this application is being submitted as the result of a previously returned application or a letter from DWQ requesting a state stormwater management permit application, list the stormwater project number, if assigned, and the previous name of the project, if different than currently proposed, 4.a. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ❑NPDES Industrial Stormwater ®Sedimentation/Erosion Control: 3.89 ac of Disturbed Area ❑404/401 Permit: Proposed Impacts b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number, issue date and the type of each permit: 5. Is the project located within 5 miles of a public airport? ®No ❑Yes If yes, see S.L. 2012-200, Part VI: htt�//portal.ncdenr.org/web/wq/ws/su/statesw/rules laws Form SWU-101 Version 06Aug2012 Page I of Ill. CONTACT INFORMATION 1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the project): Applicant/Organization:Virginia Electric and Power Co. (Dominion North Carolina Power) Signing Official & Title:Dominick F. Piccolomini, Authorized Representative b.Contact information for person listed in item la above: Street Address:701 East Carry Street, 12'h Floor City:Richmond State:VA Zip:23219 Mailing Address Phone: (804 ) 771-6082 Fax: Email: I)ominick.Piccolonlini@cioni.com c. Please check the appropriate box. The applicant listed above is: ® The property owner (Skip to Contact Information, item 3a) ❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below) ❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and 2b below) ❑ Developer* (Complete Contact Information, item 2a and 2b below.) 2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the person who owns the property that the project is located on): Property Owner/, Signing Official & b.Contact information for person listed in item 2a above: Street Address- City: - Mailing Address (if City: Phone: ( 1 Email: State: z State: Fax: ! 1 3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other person who can answer questions about the project: Other Contact Person/Organization:ARCADIS-US (Engineering Consultant) Signing Official & Title:Chris Soldan or Todd Boykin b.Contact information for person listed in item 3a above: Mailing Address:"1100 Welborne Dr Suite 100 City:Richmond State:VA Zip:23229 Phone: (804 ) 740-0181 Fax: (804 ) 740-1053 EmaiLchris.soldan@arcadis-us.com or todd.boykin@arcadis-us.com 4. Local jurisdiction for building permits: Perquimans County, NC Building Inspections Point of Contact:Virgil'Parrish Phone k: (252 ) 426-8283 Fonn S WU-101 Version 06Aug2012 Page 2 of 6 IV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. An open basin sand filter will treat the runoff for the first 1r/z inch of rainfall from existing impervious areas on a'1:1 basis with the increased impervious area. The outlet pipe will discharge to the existing ditch For storms greater than the 1-year 24-hour storm, excess runoff will sheet flow to the existing grass -lined ditches 2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued Date: ❑ Other: Date: b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with: ❑ Coastal SW - 1995 ❑ Ph II - Post Construction 3. Stormwater runoff from this project drains to the Pasguotank River basin. 4. Total Property Area: 4 acres 5. Total Coastal Wetlands Area: acres 6. "Total Surface Water Area: acres 7. Total Property Area (4) - Total Coastal Wetlands Area (5) -Total Surface Water Area (6) = Total Project Area': acres Total project nren shall be calculated to exclude the followingg the normal wool of ingpunded structures, the area Nhueen the books of streams and rivers, the area below the Normal High Water (NHW) line or Mean High Water (MHW) line, and coastal wetlands lardroard frmn the NHW (or MHW) line. '17re resultant project area is used to calculate overall percent built upon area (BUA). Nou-coastal wetlands landward of fhe NHW (or MHW) line may be included in file total project area. 8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 49 % 9. How many drainage areas does the project have? 3 (For high density, count 1 for each proposed engineered stormwater BMP. For low density and other projects, use 1 for the whole property area) 10. Complete the following information for each drainage area identified in Project Information item 9. If there are more than four drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basin Information Drainage Area 1 Drainage Area 2 Draina e Area 3 Draina e Area _ Receiving Stream Name Unnamed tributary to Mill Creek Unnamed tributary to Mill Creek Unnamed tributary to Mill Creek Stream Class " Mill Creek (SC) Mill Creek (SC) Mill Creek (SC) Stream Index Number* 30-6-5-(2) 30-6-5-(2) 30-6-5-(2) Total Drainage Area (so 37,168 106,192 33,760 ✓ On -site Drainage Area (so 37,168 106,192 33,760 Off -site Drainage Area (so 0 0 0 Proposed Impervious Area** (so 12,917 . 54,322 19,070 % Impervious Area** total 35 51 56 Impervious'* Surface Area Drainage Area 1 Drainage Area 2 Drainage Area _ Drainage Area _ On -site Buildings/Lots (so - - On -site Streets (so - - On -site Parkin (so - - On -site Sidewalks (so - - Other on -site (so -979 ✓ 4097 ✓ 1604 ✓ Future (so - - Off -site (so - - Existin BUA*** (so 13,896 50,226 ✓ 17,466 Total (so: 12,917 54,322 19,070 Streaur Class and Index Number call be determined at: http://portal.ncdenr.org eb/wq[ps/csu/classifications Form SWU-101 Version 06Aug2012 Page 3 of 6 Int/wrvious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Report only that anount of existing BL1A that will remain after development. Do not report any existing BUA that is to be removed and which will be replaced by new BUA. 11. Flow was the off -site impervious area listed above determined? Provide documentation. Projects in Union County: Contact DIVQ Central Office stafflo check ifthe project is located within a Threatened & Endangered Species watershed that stay be subject to more stringent smrnnvater requirements as per 1511 NCAC 02B .0600. V. SUPPLEMENT AND O&M FORMS The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded from htti)://t)ortal.ncdenr.oru/web/wa/ws/su/bmD-manual. VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. A detailed application instruction sheet and BMP checklists are available from http://portal.ncdenr.oriz/web/wq/ws/su/statesw/forms does. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map at http://portal.ncdenr.org/web/wq/ws/su/maps.) Please indicate that the following required information have been provided by initialing in the space provided for each item. All original documents MUS"I' be signed and initialed in blue ink. Download the latest versions for each submitted application package from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms does. Initials 1. Original and one copy of the Stormwater Management Permit Application Form. 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants Form. (if required as per Part VII below) 3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M agreement(s) for each BMP. 4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to http://www.envhelp.org/pages/onestopexpress.html for information on the Express program and the associated fees. Contact the appropriate regional office Express Permit Coordinator for additional information and to schedule the required application meeting.) 5. A detailed narrative (one to two pages) describing the stormwater treatment/management for 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the Vz mile radius on the map. 7. Sealed, signed and dated calculations (one copy). 8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including: a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. e. North arrow. I. Scale. g. Revision number and dates. h. Identify all surface waters on the plans by delineating the normal pool elevation of impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal waters, and any coastal wetlands landward of the MHW or NHW lines. • Delineate the vegetated buffer landward from the normal pool elevation of impounded structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters. i. Dimensioned property/project boundary with bearings & distances. j. Site Layout with all BUA identified and dimensioned. k. Existing contours, proposed contours, spot elevations, finished floor elevations. 1. Details of roads, drainage features, collection systems, and stormwater control measures. in. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a qualified person. Provide documentation of qualifications and identify the person who made the determination on the plans. n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations. Form SWU-101 Version 06Aug2012 Page 4 of 6 Q o. Drainage areas delineated (included in the main set of plans, not as a separate document). p. Vegetated buffers (where required). Copy of any applicable soils report with the associated SI-IW"r elevations (Please identify elevations in addition to depths) as well as a map of the boring locations with the existing elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the project area clearly delineated. For projects with infiltration BMPs, the report should also include the soil type, expected infiltration rate, and the method of determining the infiltration rate. (Infiltration Devices submitted to WiRO: Schedule a site visitfor DWQ to verifij the SHWr prior to submittal, (910) 796-7378.) A copy of the most current property deed. Deed book: 16 Page No: 554 For corporations and limited liability corporations (LLC): Provide documentation from the NC _ Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in Contact Information, item 'la, 2a, and/or 3a per'15A NCAC 2H.1003(e). The corporation or LLC must be listed as an active corporation in good standing with the NC Secretary of State, otherwise the application will be returned. http://www.secretary.state.nc.us/Corporations/CSearch.aspx VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and protective covenants forms can be downloaded from http://portal.ncdenr.org/web/wq/ws/so/statesw/forms does. Download the latest versions for each submittal. In the instances where the applicant is different than the property owner, it is the responsibility of the property owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring that the deed restrictions are recorded. By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and protective covenants for this project, if required, shall include all the items required in the permit and listed on the forms available on the website, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the NC DWQ, and that they will be recorded prior to the sale of any lot. Vill. CONSULTANT INFORMATION AND AUTHORIZATION Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as addressing requests for additional information). Consulting Engineer:Todd Boykin Consulting Finn: ARCADIS-US Mailing Addressi1100 Welborne Dr Suite 100 City:Richmond State:VA Zip:23229 Phone: (804 ) 740-0181 Email:todd.boykin@arcadis-us.com Fax: (804 ) 740-1053 IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this section) 1, (print or type name of person listed in Contact Information, item 2a) certify that I own the property identified in this permit application, and thus give permission to (print or hype name of person listed in Contact Information, item 1a) with (print or hjpe tame of organization listed in Contact btfornation, item la) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal, which indicates the party responsible for the operation and maintenance of the stormwater system. Form S WU-101 Version 06Aug2012 Page 5 of 6 As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6. a Notary Public for the State of do hereby certify that before me this _ day of , County of personally appeared and acknowledge the due execution of the application for a stormwater permit. Witness my hand and official seal, SEAL My commission X. APPLICANT'S CERTIFICATION Dominick F. Piccolomini for 1, (print or hjpe name of person listed in Contact Information, item 1n) Dominion North Carolina Power certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of the applicable stormwater rules under "15A NCAC 21-1 .10000%and any other applicable state stormwater requirements. Signature: o�/��� � ��.e ram- ��- Date: .-/31113� sue, a Notary Public for the State of Gea+tty of _ptchman� do hereby certify that amtpi"D{(� F. �r rn�o(yn1 personally appeared before me this��iay of , tro I3 , and acknowledge tl e Live execution of the application for a stormwater permit. Witness my hand and official seal, E �S PRY PU •. 90 W I=O� ���•:F9 L o: Cl ®�® O: �i '•, Q� Cb 2� 4inHrr°� N```• SEAL My commission expires 7Scl . go(5- Form SW U-101 Version 06Aug2012 Page 6 of 6 Permit Number. (to be provided by DWQ) Op W47E4 WDEHR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM SAND FILTER SUPPLEMENT This form must be tilled out on line, punted and submitted with all of the required information. Make sure to also fill out and submit the Required Items Checklist (Section NIJ and the I&M Agreement (Section 1W 11. PROJECT INFORMATION Project name Dominion North Carolina Power - Winfall Substation Contact name Chris Soldan or Todd Boykin Phone number 804-740-0181 Date May 29. 2013 Drainage area number Sand Filter Drainage Area SFDA1 (subdrainage area of DAN1) II. DESIGN INFORMATION Site Characteristics Drainage area (A,) Impervious area % Impervious (IA) Design rainfall depth (RD) Peak Flow Calculations 1-yr, 24-hr runoff depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Pre/Post 1-yr, 24-hr peak control Storage Volume Design volume (WQV) Adjusted water quality, volume (WQVA4) Volume contained in the sedimentation basin and on top of the sand filter Top of sand filter/grate elevation Weir elevation (between chambers) Maximum head on the sedimentation basin and sand filter (hr Fi a) Average head on the sedimentation basin and sand filter (hA) Runoff Coefficient (R,r) Type of Sand Filter Open sand filter? SHWT elevation Bottom of the sand filter elevation Clearance (ds,,T) Closed/pre-cast sand filter? SHWT elevation Bottom of the sand filter elevation Clearance (dsawr) If this is a closed, underground closed sand filler. The clearance between the surface of the sand filter and the bottom of the roof of the underground structure (da.) 15,995.00 fill 8,907.D0 ft' 55.7% % 1.50 in 3.06 in 0,13 inthr 0.24 ft'/sec 0.26 ff'lsec 0.02 ft'/sec 1,102.00 ft' 826.50 ft' 2,390.00 ft' 14 ft amsl 13.75 $ amsl 0.25 it 0.13'ft 0.55 (unitless) Y YorN 10.84 It amsl 12.25 it amsl 1.41 YorN ft amsl ft amsl OK E C E I V E D JUN - 6 2013 OK Insufficient depth. OK Form SW401Sand Filter-Rev.5 2009Sept17 Parts I and II. Proiect Design Summary, Page 1 of 2 Permit Number. (to be povided by DWO) Sedimentation Basin Surface area of sedimentation basin (A,) Sedimentation basin/chamber depth Sand Filter Surface area of sand filter (Af) Top of sand media filter bed elevation Bottom of sand media filter bed/drain elevation Depth of the sand media filter bed (d,) Coefficient of permeability for the sand filler (k) Outlet diameter Outlet dischargeHlowrate Time to drain the sand filter (1) Time to drain the sand filter (t) Additional Information Does volume in excess of the design volume bypass the sand fifteR Is an off-line flaw-splifting device used? If draining to SA waters: Does volume in excess of the design volume flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? Is the BMP located at least 30ft from surface waters (50ft if SA waters)? If not a dosed bottom, is BMP located at least 100ff from water supply wells? Are the vegetated side slopes equal to or less than 3:1 Is the BMP located in a recorded drainage easement with a recorded access easement to a public Right of Way (ROW)? What is the width of the sedimentation chamber/forebay (Wsw)? What is the depth of sand over the outlet pipe (dpipe)? 260.00 ff' JR. nieels IIIII unmet, uuuuey iincu lu ue niuedcuu w 1,50 ft nnnln:n Ilan —.....A ..nl..nn :( nr.n..nAn. Clnnv.n 1,500.00 ft' Vn, muem umsumw, um iiidy uauu w ue IIIUIWseu w nnnlnin IFn —.4—A nlnn i(nrm� nAn� Cln�nnn 13.75 ft amsl 12.25 ft amsi 1.50 It 3,50 (ft/day) 4.00 in 0.06 ft'/sec 10.29hours OK. Submit drainage calculations. 0.43 days Y Y or N OK Y YorN OK YorN It YorN Y YorN OK Y YorN OK Y YorN OK YorN 2.00'It OK 1.17 ft OK Form SW401Sand Fllter-Rev.5 2009Sep117 Parts I and II. Petted Design Summary, Page 2 of 2 DV Permit Number: (to be provided by OWQ) Drainage Area Number: Sand Filter Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — "fhe drainage area will be carefully managed to reduce the sediment load to the sand filter. — The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds six inches. — Once a year, sand media will be skimmed. — The sand filter media will be replaced whenever it fails to function properly after maintenance. The sand filter will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How I will remediate the problem: Entire BMP Trash/debris is present. Remove the trash/debris. Adjacent pavement (if Sediment is present on the Sweep or vacuum the sediment as soon as applicable) pavement surface. possible. Perimeter of sand filter Areas of bare soil and/or erosive Regrade the soil if necessary to remove the gullies have formed. gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too long. Maintain vegetation at an appropriate height. Flow diversion structure The structure is clogged. Unclog the conveyance and dispose of any ' sediment offsite. The structure is damaged. Make any necessary repairs or replace if damage is too large for repair. Forebay or pretreatment area Sediment has accumulated to a Search for the source of the sediment and depth of greater than six inches. remedy the problem if possible. Remove the sediment and stabilize or dispose of it p in a location where it will not cause ' t/ ® impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such JUN - 6 2013 as reinforced turf matting or riprap if needed to prevent future erosion problems. �%�� IQ— Y V ARO Weeds are present. Remove the weeds, preferably by hand. If a pesticide is used, wipe it on the plants rather than spraying. Form S W 401-Sand Filter O&M-Rev.4 2009Sept 17 Page I of 3 BMP element: Potentialproblem: How I will remediate theproblem: Filter bed and underdrain Water is ponding on the surface for Check to see if the collector system is collection system more than 24 hours after a storm. clogged and flush if necessary. If water still ponds, remove the top few inches of filter bed media and replace. If water still ponds, then consult an expert. Outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment offsite. The outlet device is damaged Repair or replace the outlet device. Receiving water Erosion or other signs of damage Contact the NC Division of Water Quality have occurred at the outlet. 401 Oversight Unit at 919-733-1786. Form SW401-Sand Filter O&M-Rev.4 2009Septl 7 Page of 3 Permit Number: provided by DIVQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Dominion North Carolina Powe r - Winfall Substation BA1fP drainage area number:SFDAI Print name:Dominick F. Piccolomini Title:Authorized Representative, Virginia Electric and Power Company Address:701 East Cary Street: 12t11 Floor. Richmond, VA 23219 Date: 2r131 //3 Note: The legally responsible party should not be a homeowners association unless more than 50%of the lots have been sold and a resident of the subdivision has been named the president. 1, , a Notary Public for the State of V6§niq , Cect of VchmmnA , do hereby certify that Dbmt6ck_ e, PtecOOW*I , personally appeared before me this 315- day of (vial_ � 201.3 , and acknowledge the due execution of the forgoing sand filter maintenance requirements. Witness my hand and official se I, P. 11111111ffff v :.SPAY pVe,9��� n: =o: #28�8.�J�Q�: y,"LT H 13 ��.. ffn1111d11 SEAL My commission expire, Form SW401-Sand Filter O&M-Rev.4 2009Septl7 Page 3 of 3