Loading...
HomeMy WebLinkAboutSW7090605_CURRENT PERMIT_20090807STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. sw::Z�� DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE c2�Zqo VV YYYYM M D D IBM NCDENR North Carolina Department of Environment and Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Governor Director August 7, 2009 Mr. George Venters, Manager Glandon Forest Equity II, LLC 3900 Merton Drive, Suite 210 Raleigh, NC 27609 Natural Resources Dee Freeman Secretary Subject: Stormwater Permit No. SW7090605 Dollar General High Density Commercial Wet Pond Project Bertie County Dear Mr. Venters: The Washington Regional Office received a complete Stormwater Management Permit Application for Dollar General on August 3, 2009. 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. SW7090605 dated August 7, 2009, for the construction of the subject project. This permit shall be effective from the date of issuance until August 7, 2019, 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 thirty (30) 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, P.O. Drawer 27447, Raleigh, NC 27611-7447. 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 Scott Vinson, or me at (252) 946-6481. incerel , L- r-- Al Hodg � Regional Supervisor Surface Water Protection Section AH/ sv: S:\WQS\SAV\STORMWATER\PERMIT\SW7090605 cc: Matt Lowder, PE — Triangle Site Desing, PLLC Bertie County Building Inspections t/�Vashington Regional Office Central Files North Carolina Division of Water Quality internet www.nowaterquality.org One L, 943 Washington Square Matt Phone: 252-946-6481 1 FAX'. 252-946-9215 N Ort it Caro t 1. n a Washington, INC 27889 FAX: 25M46 9215 An Equal Opportunity l Affirmative Action Employer Naturally State Stormwater Management Systems Permit No. SV 7090605 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 Glandon Forest Equity Il, LLC Dollar General Lewiston -Woodville, Bertie County FOR THE construction, operation and maintenance of a wet detention pond 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 August 7, 2019, 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 of this permit. The stormwater control has been designed to handle the runoff from 33,272 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated in Section I. of this permit, and per 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 least 50 feet landward of all perennial and intermittent surface waters. Page 2 of 7 State Stormwater Management Systems Permit No. SV 7090605 7 The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. b. Drainage Area, ftZ: Total Impervious Surfaces, ft2: Design Storm, inches: Pond Depth, feet: TSS removal efficiency: Permanent Pool Elevation, FMSl : Permanent Pool Surface Areq, ft Permitted Storage Volume, ft : Temporary Storage Elevation, FMSL Predevelopment 1 year 24 hour: Post development 1 year 24 hour: Controlling Orifice: Permitted Forebay Volume, ft3: Fountain Horsepower, HP Receiving Stream/River Basin: Stream Index Number: Classification of Water Body: IL SCHEDULE OF COMPLIANCE Co 47,916 33,272 1.50 3.0 avg. — 7.40 total 90 % 69.40 6,338 4,398 70.00 4.62 cfs 1.21 cfs 1.25" 0 pipe 3,147 (not allowed, too small) UT Cashie River /Roanoke Basin 24-2—(1) "C; Sw" 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 time 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. Mowing and re -vegetation of slopes and the vegetated filter strip. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, level spreader, filter strip, catch basins and piping. g. Access to the outlet structure must be available at all times. Records of maintenance activities must be kept for each permitted BMP. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. The permittee shall submit to the Division of Water Quality an annual summary report of the maintenance inspection records for each BMP. The report shall summarize the inspection dates, results of the inspections, and the maintenance work performed at each inspection. 6. Access to the stormwater facilities shall be maintained via appropriate easements at all times. Decorative spray fountains will not be allowed in the stormwater treatment system. Page 3 of 7 State Stormwater Management Systems Permit No. SV 7090605 8. The facilities shall be constructed as shown on the approved plans. This permit shall become void unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 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 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. 10. 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. 11. 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, for which 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. 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. 13. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 14. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. III. GENERAL CONDITIONS This permit is not transferable 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 supporting documentation as listed on page 2 of the form. The project must be in good standing with the Division. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Page 4 of 7 State Stormwater Management Systems Permit No. SV 7090605 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 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 re -issuance or. termination does not stay any permit condition. 8. Unless specified elsewhere, permanent seeding requirements for the stormwater control 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 2006- 246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al. 11. The permittee shall notify the Division 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 August 7, 2019. 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 71h day of August, 2009. RTH CAROLINA \t. k kLe ENVIRONMENTAL MANAGEMENT COMMISSION for Division of Water Quality By Authority of the Environmental Management Commission Stormwater Permit No. SV 7090605 Page 5 of 7 State Stormwater Management Systems Permit No. SV 7090605 Dollar General Stormwater Permit No. SW7090605 Bertie 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. SV 7090605 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 outlet/bypass structure elevations are per the approved plan. 6. The outlet structure is located per the approved plans. 7. Trash rack is provided on the outlet/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. Required drawdown devices are correctly sized per the approved plans. 13. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Washington Regional Office Bertie County Building Inspections Page 7 of 7 State Stormwater Management Systems Permit No. SV 7090605 Dollar General Stormwater Permit Bertie County No. SW7090605 Designer's Certification I, /4a-hthew E. Lawde✓ as a duly registered E ,heel- in the State of North Carolina, having been authorized to obsery(periodically weekly/ full time) the construction of the project, (Project) for �a�a n �res� 4cN4 Il Lie (Project Owner) hereby state that, to the best of my abilities, due ca a 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: Cvt w e0or i�< �G l%y $LPG"0 /I /�JC�L✓� Cl Signature �zti�l_Gt�� Registration Number 2¢43¢ Date /,q 67 �09 SEAL C� a' a �FEssio - � SEAL � - 2443J,0<I ncr 3� %Lfi.9 Page 6 of 7 State Stormwater Management Systen4s Permit No. SW7090605 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 outlet/bypass structure elevations are per the approved plan. ✓ 6. The outlet structure is located per the approved plans.- 7. Trash rack is provided on the outlet/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. Required drawdown devices are correctly sized per the approved plans. 13. All required design depths are provided. ✓ 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. ✓ 15. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Washington Regional Office Bertie County Building Inspections Page 7 of 7 i yRIANC LE SITE DESIGN PLLC Transmittal 165 Trentham Trail Clayton, North Carolina, 27527 TEL (919) 553-6570 Date: October 28, 2009 Job Nwnber: 004004 Project Name: Dollar General —NC Highway 308 — Bertie County To: NCDENR — Washington Regional Office Attn. Scott Vinson 943 Washington Square Mall Washington, NC 27889 252-946-6481 We are sending these by ❑ U.S. Mail ® UPS ❑ Hand Delivery ❑ Other We are sending you ® Attached ❑ Under separate cover via the following items: ❑ Shop drawings ❑ Prints/Plans ❑ Samples ❑ Specifications ❑ Change Orders ❑ Other Copies Date No. Description 1 Pond Certification Letter These are transmitted as checked below ❑ For your use ❑ Approved as submitted ❑ Resubmit ❑ Copies for approval ❑ As requested ❑ Approved as noted ❑ Submit ❑ Copies for distribution ® For review and comment ❑ Returned for comeclions� - E)"'n Reium 1 ❑ Corrected prints Remarks: OCT SO 2009 Copy to: Si'gned. r _ . �. Matthew E. Lowder, PE STORMWATER SUBMITTAL REQUIREMENTS WET DETENTION POND Objective A. Collect all runoff from all BUA (proposed and/or existing and/or offsite) as the case may be, by any means including piping or swales, and direct it to the pond. B. Check the proposed pond design to make sure it meets or exceeds the minimum design criteria for surface area, volume and drawdown. H. What makes up a complete wet detention pond application package? A. Two sets of sealed, signed & dated layout & grading plans with appropriate details. (Additional sets of plans may be requested for projects in certain counties) B. Completed application with supplement(s), SWU-101, SW401-Wet Pond, and inspection and maintenance agreements. C. Deed restriction document, if applicable (for subdivisions & projects with out parcels) D. Sealed, signed & dated calculations. E. Estimated seasonal high water table elevation at all pond locations. F. Chlorides test results must be provided if the project is within '/z mile of SR waters (Phase II). (This is only required to test out of SR water treatment requirements) III. BIMS entry (for DWQ use only) Enter & track application acknowledged date, review date, add info requested/received dates, permit issue dates, and drainage area info. Best done after the add info letter is written and before sending permit up for signature. IV. Shell documents (for DWQ use only) Permit shells: s:\wqs\stormwater\shells\highcompond s:\wqs\stormwater\shells\highsubpond s:\wqs\stormwater\shells\HDhybrid Spreadsheet: s:\wqs\stormwater\excel spreadsheets\pond VI. Review Procedure A. APPLICATION ✓1. An original signature is required. Photocopied signatures cannot be accepted. %k. A completed wet detention pond supplement and a signed, dated and notarized wet detention pond Inspection and Maintenance Agreement with an original signature. ✓3. The numbers on the supplement match up to the numbers used in the calculations and shown on the plan details. ✓4. Built -upon areas are reported in square feet in Section 111.6. ✓5. Receiving stream name and classification. This is important because in the non -Phase II counties, a wet pond cannot be used on a project that is within'/2 mile of and draining to SA waters. For Phase 11, a wet pond is allowed within '/z mile of SA waters. ✓6. Section 111.6 is filled in -cannot be left blank. One column must be filled in for each proposed wet pond. If the applicant is a corporation, partnership or LLC, look it up on the Secretary of State Corporations Database. Make sure corporation is spelled correctly (capitalization and punctuation matter) and that the person signing the application is at least a vice- president in the corporation, a General Partner in the partnership, a member in a member -managed LLC, or the manager of a manager -managed LLC. Need documentation to support if the Articles of Incorporation do not list the members or managers of the LLC. If an agent signs, then a letter of authorization is needed from the president, vice president, general partner, member or manager. r :APB. For subdivided projects, a signed and notarized deed restriction statement must be provided. Swages %Wbtb �0 04 wmm"w 3 Asbqr� Wet Detention Pond, cont. B. CALCULATIONS J1. The orifice is sized based on drawing down the calculated minimum volume in 2-5 days. The average head to use in the orifice equation is approximately one-third of the distance between the permanent pool elevation (PPE) and the elevation of the next available outlet above the permanent pool. The elevation of the next available outlet must be either the elevation where the minimum volume is provided, or it can be higher. The temporary pool elevation (TPE) to report on the supplement will be the elevation of the next available outlet above the PPE. The temporary pool volume (TPV) to report on the supplement is the volume between the specified PPE and the TPE. NIA2. For Phase II projects that are within ''/z mile of and draining to SR waters, the difference in runoff from the predevelopment and post -development conditions for the 1 year 24 hour storm must be controlled and treated. Nl�k3. For Phase II projects, the discharge rate leaving the pond can be no more than the pre -development discharge rate for the 1 year 24 hour storm. VQk4. For Phase II projects draining to SA water, no discharge to surface waters may occur from wet ponds. The discharge leaving the orifice must be effectively infiltrated prior to reaching surface waters. ✓5. The average pond depth is the permanent pool volume divided by the permanent pool surface area. The result must be between 3 ft. and 7.5 ft. Parts of the pond can be deeper than 7.5 ft., but in no case can any part of the pond be less than 3 ft deep. ✓6. If the 85% TSS chart is used a 30' vegetated filter must be provided at the outlet of the pond. If the 90% TSS chart is used, no filter is required. ,,rT Use the correct SA/DA TSS chart from the BMP Manual noting that there are different charts for different areas of the State. v#*8. Required surface area at permanent pool. ✓9. Provided surface area at permanent pool (Based on pond dimensions) V10. Required volume calculation based on 1.5" storm for Phase II projects* and 1" storm for all others projects. *unless the project is Phase II and within ''/z mile of and draining to SR waters then the volume calculation must be based on difference between the pre and post development conditions for the 1-yr 24-hr storm. ✓11. Table of elevations, areas, incremental volumes and accumulated volumes for overall pond and for forebay, to verify volumes provided. ./12. Forebay designed to hold 20% of the permanent pool volume. (Range of 18%-22% OK.) tq� 3. Non -erosive flow for 10 yr. storm in the vegetated filter, if using 85% TSS. 4. The seasonal high water table must be at or below the proposed permanent pool elevation to assure that the necessary volume will be available above the permanent Pool. ✓15. Rounding numbers off during the calculation process can result in deficiencies. Do not round the numbers until you get to the final result. f16. An additional one foot must be excavated below the bottom elevation of the pond. The 1 foot sediment accumulation depth is not included in the average depth calculation. Wet Detention Pond, cont. C. PLANS- Due to storage space constraints, plan sheets should be kept to a minimum. For small commercial single wet pond projects, the plan set could consist of only 2 or 3 sheets, layout, grading and details. For larger projects, show as much information as possible on as few sheets as possible, without cluttering them up. v9. Development/Project Name , 2. Engineer name and firm. Legend 4. North Arrow ✓5. Location Map with nearest intersection of two major roads shown. Major road is any 1, 2, or 3 digit NC, US or interstate highway. A. Scale- standard engineering scale, no off-the-wall stuff. ✓7. Date W . Revision number and date, if applicable. 9. Original contours, proposed contours, spot elevations, finished floor elevations, pipe inverts, swale inverts, etc. ✓10. Existing drainage (piping, swales, ditches, ponds, etc.), including off -site. Include a map delineating the offsite drainage areas. ✓11. Property/Project boundary lines, bearing & distances. WA12. Mean High Water Line or Normal High Water Line, if applicable. 13. The permanent pool elevation must be above the SHWT and above the lowest elevation of adjacent wetlands. Evaluate the need for a liner and/or berm/slurry wall to prevent dewatering the wetland. 14. Drainage easement widths, pipe sizes and swale inverts are provided. —P15. Wetlands delineated, or a note on the plans that none exist. Get a copy of the wetlands delineation map signed by the Corps of Engineers, or have the applicant include a copy of the unsigned delineation map submitted to the Corps. Wet ponds may not be located in wetlands unless a permit to fill those wetlands has been obtained. 446. Details for the roads, parking, cul-de-sacs, including sidewalk width, radii, dimensions& slopes. W1417. Apartment / Condo development- Provide a typical building footprint with dimensions and note all concrete and wood deck areas. ,X8. The drainage area for each wet pond is clearly delineated and numbered to match up to the calculations and supplement. Drainage area delineation is best done as a separate plan sheet. ✓1 g. A pond section detail to include the forebay, a 10 foot wide vegetated shelf, pertinent elevations for the bottom, permanent pool, temporary pool, and SHWT, 3:1 slopes above the permanent pool, and the weir elevation between the main pond and the forebay. ✓20. The 10 vegetated shelf extends 6" below and 6" above the permanent pool elevation. ,/21. An outlet structure detail showing a trash rack with <_6" square openings, the necessary orifice invert elevation (i.e., the permanent pool), orifice size and temporary pool elevation. -j22. Dimensions for each line and arc formed by the permanent pool contour. qIp 23. Where the 85% TSS chart was used, a 30 ft. vegetated filter strip is required to be shown on the plans & detailed (elevations, inverts, slopes, and flow spreader mechanism). Please note that the filter strip is not a ditch. ✓24. A forebay is provided for each inlet and located so as to prevent short-circuiting. 25. The pond must have a minimum 1.5:1 length to width ratio and a minimum 3:1 flow path length. Artificial "baffles' of timber, vinyl, or earth can be used to create a longer flow path. The top elevation of the baffle should be set at the temporary pool elevation or higher. ✓26. A Vegetation plan is specified for the pond, including slopes. Wetlands species are listed for planting on the 10:1 shelf. Weeping Love Grass is not suitable as a permanent vegetated cover for pond slopes. ,47. All roof drainage must be directed to the pond. Show the roof drain collection lines on the plan. This is necessary for projects where the buildings back up the property lines where roof drainage may leave the site prior to going through the pond. �g rF• .r •�ian�c'� tiV g44iol tiwoe �1! ) ;jlt -_+'r State of North Carolina — 4A-CK 6/I7/09 Department of Environment and Natural Resources Division of Water Quality S-Az. I( /I 1 STORMWATER MANAGEMENT PERMIT APPLICATIOESS This form may be photocopied for use as an original I. GENERAL INFORMATION AUG 0 3'2009 1. Applicants name (specify the name of the corporation, individual, etc. who owns the p)DENR Glandon Forest Equity II, LLC 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): George Venters (MA k& .1) 3. Mailing Address for person listed in item 2 above: 3900 Merton Drive, Suite 210 City:Raleigh State:NC Zip:27609 Phone: (919 ) 459-2602 Fax: (919 ) 459-2604 Email:gyenters&vangua rdpg.com 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): 5. Location of Project (street address): 211 E. Church Street (NC Highway 308) City:Lewiston County:Bertie Zip: 6. Directions to project (from nearest major intersection): Approximately 350 feet west of the intersection of NC Highway 11 & NC Highway 308 7. Latitude:36° 0722" N Longitude:77° 10' 25" W of project 8. Contact person who can answer questions about the project: Name:Matthew E. Lowder, PE Telephone Number: (919 ) 553-6570 Email:mlowder@embarqmail.com II. PERMIT INFORMATION: 1. Specify whether project is (check one): ®New []Renewal []Modification 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): ❑Low Density ®High Density []Redevelop []General Permit []Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks; information on required state permits can be Form SWU-101 Version09.25.08 Page I of obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ESedimentation/Erosion Control ❑404/401 Permit ❑NPDES Industrial Stormwater III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. A wet detention pond is proposed to treat storm water runoff from the proposed commercial development. The site is designed to treat a 1.5" storm at 90%TSS 2. Stormwater runoff from this project drains to the Roanoke River basin. 3. Total Property Area: 1.75 acres 4. Total Coastal Wetlands Area: 0 acres 5. Total Property Area (3) — Total Coastal Wetlands Area (4) = Total Project Area**:1.75 acres 6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA):69.4 7. How many drainage areas does the project have?1 8. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. For high density projects, complete the table with one drainage area for each engineered stormwater device. Basin Information Uramage Area I Drainage Area Receiving Stream ame Cashie River tream ass Index o. w _ G otal Drainage rea s Un-site Drainage rea s Uff-site Drainage Area(so 0 Existing Impervious Area (sf) Proposed Impervious Area (sf) %Impervious Area (total) GCf �K Impervious Surface Area Drainage Area 1 Urainage Area On -site Build mgs(so 9,014 On -site Streets(so 0 On -site Parking(so 22,780 On -site Sidewalks s t er on-site(so 0 Off-site(so 0 ota s Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. "*Total project area shall be calculated to exclude Coastal Wetlands from use when calculating the built upon area percentage calculation. This is the area used to calculate overall percent project built upon area (BUA). 9. How was the off -site impervious area listed above derived?No off -site runoff is draining to the pond Projects in Union County: Contact the DWQ Central Office staff to check to see if you project is located within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater requirements. IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS Form SWU-101 Version 09.25.08 Page 2 of One of the following property restrictions and protective covenants are required to be recorded for all subdivisions, outparcel's and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. Forms can be downloaded from http://h2o.enr.state.ne.us/su/bmp forms.htm - deed restrictions. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded property restrictions and protective covenants for this project shall include all the applicable items required in the above form, 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. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater Permitting Unit at (919) 807-6300 for the status and availability of these forms. Forms can be downloaded from http://h2o.enr.state.nc.us/su/bmp forms htm. Form SW401-Low Density Low Density Supplement Form SW401-Curb Outlet System Curb Outlet System Supplement Form SW401-Off-Site System Off -Site System Supplement Form SW401-Wet Detention Basin Wet Detention Basin Supplement Form SW401-Infiltration Basin Infiltration Basin Supplement Form SW401-Infiltration Trench Underground Infiltration Trench Supplement Form SW401-Bioretention Cell Bioretention Cell Supplement Form SW401-Level Spreader Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Form SW401-Wetland Constructed Wetland Supplement Form SW401-Grassed Swale Grassed Swale Supplement Form SW401-Sand Filter Sand Filter Supplement Form SW401-Permeable Pavement Permeable Pavement Supplement Form SW401-Cistem Cistern Supplement Form SWU-101 Version 09.25.08 Page 3 of 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. The complete application package should be submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the interactive online map at http://h2o.enestate.ne.us/su/msi mans.htm) 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. • Original and one copy of the Stormwater Management Permit Application Form • Original and one copy of the Deed Restrictions & Protective Covenant Form (if required as per Part IV above) ove) • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP • Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD) payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management • Copy of any applicable soils report • Two copies of plans and specifications (sealed, signed & dated), including: - Development/Project name - Engineer and firm - Legend - North arrow - Scale - Revision number & date 11 Il fials N A/�V / Lam✓ - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf (such as additional information requests), please complete this section. (ex. designing engineer or firm) Designated agent (individual or firm): Mailing Add Phone: Vill. APPLICANT'S CERTIFICATION State: Zip: Fax: ( ) 1, (print or type nine of person lister( in General Information, item 2) George Venters 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 cox)2fi7ants will be rded, and that the proposed project complies with the requirements of 15A NCAC 2H .1000 l q Signature: Date: Form SWU-101 Version 09.25.08 Page 4 of wci Permit No.%hk3 a_ (to be provided by D W0J EXPRESS AUG 0 3 Z009 NC DENR ��_ STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM NCDENR WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part /if) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION Project name Dollar General Contact person Matt Lowder, PE Phone number 919-553-6570 Date 6112/2009 Drainage area number 1 II. DESIGN INFORMATION Site Characteristics Drainage area 47,916 ft Impervious area, post -development 33,272 ft % impervious 69.44 Design rainfall depth 1.5 in Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is the pre/post control of the tyr 24hr stone peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak Dow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the perm. pool elevation) Top of loft vegetated shelf elevation Bottom of 10ft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stared above the state -required temp. pool? Elevation of the top of the additional volume 4,073 ft' OK 4,398 ft' OK, volume provided is equal to or in excess of volume required. ft' ft' ft' 0 its it, y (Y or N) 2.3 in 0.60 (unitless) 0.80 (unifless) 0.10 in/hr OK 4.62 ft'Isec 121 ft'Isec -3.41 ft'Isec 70.00 first 69.40 fmsl 68.60 fmsl 69.90 fmsl 68.90 first Data not needed for calculatian option #1, but OK if provided. 63.00 fmsl 62.00 first Data not needed for calculation option #1, but OK if provided. 1.00 It n (Y or N) fmsl Form SW401-Wet Datenaon Basin-Rev.6.2120/09 Parts I. a II. Design Summary, Page 1 of 2 Permit No. (to be proveee by DWO) Area, temporary pool Area REQUIRED, permanent pool � 3;8fffftz SAIDA ratio 8.10 (unitless) Area PROVIDED, permanent pool, Ap, ,s 5iw e Area, bottom of 1 Oft vegetated shelf, A� ,,n 3,944 Il' Area, sediment cleanout, top elevation (bottom of pond), A,,. 910 fe Volumes Volume, temporary pool 4,398 fl3 OK Volume, permanent pool, V.-,d 15,651 fts Volume, forebay (sum of forebays if more than one forebay) 3,147 ft3 Forebay % of permanent pool volume 20.1% % OK SAIDA Table Data Design TSS removal 90 % Coastal SAIDA Table Used? Y (Y or N) Mountain/Piedmont SAIDA Table Used? N (Y or N) SAIDA ratio 8.10 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Y (Y or N) Volume, permanent pool, Va, '. 15,651 Its OK Area provided, permanent pool, A,,,,,,. 5,157 ftz OK Average depth calculated 3.03 It OK Average depth used in SAIDA, d,,, (Round to nearest 0.5ft) 3.0 It OK Calculation option 2 used? (See Figure 10-2b) (Y or N) Area provided, permanent pool, A.. e Area, bottom of 1 Oft vegetated shelf, A._. It, Area, sediment cleanout, top elevation (bottom of pond), As.,a rys. 'Depth' (distance blw bottom of 1 Off shelf and tap of sediment) It Average depth calculated If Average depth used in SAIDA, d,,, (Round to nearest 0.5ft) It Drawdown Calculations Drawdown through orifice? Y (Y or N) Diameter of orifice (if circular) 1.25 in Area of orifice (if -non -circular) in Coefficient of discharge (CD) 0.60 (unitless) Driving head (He) 0.20 It Drawdown through weir? N (Y or N) Weir type (unitless) Coefficient of discharge (C.) (uni8ess) Length of weir (L) It Driving head (H) It Pre -development 1-yr, 24-hr peak flow 4.46 ff3lsec OK Post -development 1-yr, 24-hr peak flow 0.03 ff31sec OK Storage volume discharge rate (through discharge orifice or weir) 0.03 ry3lsec Storage volume drawdown time 2.24 days OK, draws down in 2-5 days. OK, drawdown lime is correct. Add itfonal Information Vegetated side slopes 3 :1 OK Vegetated shelf slope 10 :1 OK Vegetated shelf width 10.0 If OK Length of flowpath to width ratio 3 :1 OK Length to width ratio 2.1 :1 OK Trash rack for overflow & orifice? Y (Y or N) OK Freeboard provided It OK Vegetated filter provided? ��.4 -W fV (Y or N) OK Recorded drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Drain mechanism for maintenance or emergencies Pump out Form SW401-We1 Detention Basin-Rev.6-2120109 Parrs I, d II. Design Summary, Page 2 of 2 Permit No. (to be provided by DWQ) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. r h4 L C NC3 C) 1. Plans (1"- 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. 61`' C_ 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: - Outlet structure with trash rack or similar, - Maintenance access, - Permanent pool dimensions, - Forebay and main pond with hardened emergency spillway, - Basin cross-section, - Vegetation specification for planting shelf, and - Filter strip. ✓�'L L_ 00/ 3. Section view of the wet detention basin (1" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. S C'G' 4. If, the basin is used for sediment and erosion control dudng construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. IvliL_ C G (GS 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay, to verify volume provided. n fir_- e4- 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. VM L_ Cr_(es 7. The supporting calculations. Wlic 8. A copy of the signed and notarized operation and maintenance (O&M) agreement. yuf L ti J A 9. A copy of the deed restrictions (if required). WLi Ca (� 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.6-2/20/09 Part III. Required Items Checklist, Page 1 of 1 Permit Number: CAp- CAbkC6 (!o be provided kv DWQ) Drainage Area Number: k EXPRESSt Detention Basin Operation and Maintenance Agreement AUG 0 3 2009 1 wil ep a maintenance record on this BMP. This maintenance record will be kept in a NC III � < 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. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): JUN 15 2009 ® does ❑ does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month 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 should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the 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 Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page I of 4 Permit Number: (to be provided by DIVA) Drainage Area Number: BMP element: I Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the Swale I sediment off -site. The forebay main treatment area The pipe is cracked or otherwise damaged. Erosion is occurring in the swale. Sediment has accumulated to a depth greater than the original design depth for sediment storage. Erosion has occurred. Weeds are present. Best professional practices show that pruning is needed to maintain optimal plant health. Plants are dead, diseased or dying. are present. Sediment has accumulated to a depth greater than the original design sediment storage depth. Algal growth covers over 50% of the area. Cattails, phragmites or other invasive plants cover 500% of the basin surface. Replace the pipe. Regrade the swale if necessary to smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the I3MP. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. Pane according to best professional practices Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Consult a professional to remove and control the algal growth. Remove the plants by wiping them with pesticide (do not spray). Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How 1 will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An mutual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. (if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 63 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 65 feet in the forebay, the sediment shall be removed. BASIN MAGRAM (fill in the blanks) Sediment Removal E .65 I Pe maven Pool Elevatio + Form SW401-Wet Detention Basin O&M-Rev.4 ------- - - - - - -- Bottom Permanent Pool Elevation 69.4 -- Volume Sediment Removal Elevation 63 Volume 64 -(t Min. Sediment Bottom Elevation 62 I-ft n. Storage POREBAY Sediment Storage MAIN POND Page 3 of 4 Page 3 of 4 Permit Number: (ro be provided by DWQ) 1 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 nante:Dollar General BMP drainage area number: Print namc:George Venters - Glandon Forest Equity 11, LLC Title: member/manager 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, OAQ% P/A/✓N fV /yFio/Dr , a Notary Public for the State of /✓o4,r1l(?,! PUt/lt�9 , County of W/7,( e do hereby certify that hEo G C VE/I/TERI personally appeared before me this //ry day of UU46C J009 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, N / , =� NOTARY N= PUBLIC c c�c c cc7rrt�L 7�'C�LjLo SEAL My commission expires q Z-1,h - Jd// Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 Of 4