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HomeMy WebLinkAboutSW4090903_CURRENT PERMIT_20110921STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW '2'OqQD3 DOC TYPE � CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE DOC DATE LIjOI�O�'�I YYYYMMDD JAW TRIANGLE SIT1: Df.S I G N ENGINEER'S CERTIFICAICIN Re: Dollar General Town of Mocksville, North Carolina Davie County Stormwater Permit No. SW4090903 Notice of Violation #NOV-2011-PC-0328 4006 Barrell Drive Suite 203 Raleigh. North Carolina 27609 (919)553-6570 RECEIV€C N,C- C)"t of ENR SEP 2 12011 Winston -salon; Regional office I, Matthew E. Lowder, a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe periodically the construction of the Dollar General project for Primax Properties, LLC, hereby state that to the best of my knowledge, 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. More specifically, this certification is for the corrective actions outlined in the Violation Response letter dated June 28, 2011 and includes the following items: • The outlet structure has been modified to bring it in compliance with the approved specifications • A pipe has been installed with the conveyance swale beside the building to collect runoff from the roof and diverting it to the wet detention pond • The swale beside the parking lot has been regarded and vegetated to convey water to the wet detention pond • A clay liner has been installed in the bottom of the wet detention pond Signature: PE Registration Number: 24434 Date: 91/511( ..%101:°A%A SEAS. � 24434 .,�h%c�•� E. r�rrrtrttt`•60 " ...' ev, PRIM&X PRO PERT IES, LLC June 27, 2011 North Carolina Division of Water Quality Winston-Salem Regional Office 585 Waughtown St Winston-Salem, NC 27017 Attn: W. Corey Basinger Subject: Stormwater Permit No. SW4090903 Notice of Violation #NOV-201 1 -PC-0328 Mocksville Dollar General Davie County RECEIVED N.C. Dept- of ENR JUN 2 8 2011 Winston -Sale. -- Regional Of, ce This letter is in response to the Notice of Violations letter dated May 26, 2011 regarding the Stormwater Permit for the Dollar General site in Mocksville, NC. We have conducted multiple visits to the site since we received the letter, including an on -site meeting with Ms. Sue Homewood on June 20, 2011, to verify the existing conditions and to determine corrective actions to address the deficient items that were noted in the letter. We have also had a discussion with the Mr. Robert Patterson on June 8, 2011 to review the items raised concerning the stormwater management pond and permitting implications with revisions to the pond to address those items. Below is our response to the items that were noted in the Notice of Violations letter and the corrective actions we proposed to make to address those issues. 1. Stormwater management pond discrepancies: Item Noted: Outlet Structure intermediate weir is at the wrong elevation and does not provide the required storage volume. Proposed Corrective Action: Measurements were made of the outlet control structure and the intermediate weir as constructed is approximately one inch lower than the proposed design elevation. in order to correct the elevation, 1 inch bricks will be set in the existing weir to raise the elevation of the intermediate weir to the design elevation. Per the discussion with Mr. Robert Patterson, making this adjustment to the outlet control structure will not warrant a revision to the permit for this stormwater facility. Item Noted: Curb and Gutter was not constructed in the front parking area as shown on the approved construction documents. Also, drainage swales on the side of the building and on the side of the parking lot are not adequately conveying runoff to the stormwater management pond. Proposed Corrective Action: An as -built survey was conducted to verify the drainage pattern in the front parking lot and to verify the grade in the existing swales. The as -built survey verified that runoff within the front 1065 East Morehead Street • 4th Floor 9 Charlotte, NC 28204-2812 • 704-344-8200 0 704-344-8288 Fax parking area is drainage towards the existing,front curb line and being picking -up in the existing drainage structure. The curb and gutter that was omitted along the side of the parking lot is not required because the runoff is being adequately conveyed to the stormwater management facility without the need for the curb. The as -built survey also indicates that the swales beside the building and at the side of the parking lot are conveying water to the stormwater management area; however, there are undulations within the swales that are preventing them from conveying the water as intended in the design. In order to correct this issue for the swale beside the building a pipe will be installed to collect runoff from the first two roof drains outlets and will be released within the Swale to convey the runoff from the building past the flattest area of the Swale. For the Swale beside the parking area the contractor is going to re -grade the Swale to improve the flow of runoff to the stormwater management pond. 2. Stormwater management pond maintenance: Item Noted: Wet detention basin did not have the appropriate minimum water level present Proposed Corrective Action: 1t appears that there are two contributing factors into the water level in the pond. First, we researched historical data and the rainfall in the Mocksville from May 1 St to June 21 Et was only 0.24 inches. With this small amount of rainfall the water elevation within the pond would be expected to be lower than normal due to evaporation and other forces. Second, based on field observations the existing soil at the bottom of the main pond area is a clay/sand mixture that is allowing water to infiltrate into the surrounding soil. The soils in the forebay area have more clay in them and are not allowing infiltration into the ground. In order to prevent this from continuing to happen, the contractor is going to construct a compacted clay soil liner. The clay liner will be constructed within the main pond area up to the level of the existing mulch and will be compacted to create a barrier to prevent water from infiltrating into the surrounding soils. Sincerely, AFranFawcett Project Director Primax Properties, LLC C: Matt Lowder Russ Harriger Greg Jordan PRINC PROP ERTIFS,LLC Frank Fawcett Project Director 1065 East Morehead Street 4th Floor Mobile 704-576-4509 Charlotte, NC 28204-2812 Fax 704-344-8288 ffawcett@primaxproperties.com PRI NBC SERVICES, LLC Russell Harriger, RPA, CPM Senior Property Manager Tenant Support 704-954-7233 1 1065 East Morehead Street Office 704-954-7217 4th Floor Mobile 704-519-9908 Charlotte, NC 29204-2812 Fax 704-374-1416 rhar-riger@primaxservices.com Location: Mocksvile DG Date of Inspection: June 1, 2011 [-RECEIVED N.C. Pnoi, of ENR Wet Detention Basin Operation and Inspection Sheet JUN 2 0 2011 Y1ir,ston-Salem 1 Important Maintenance procedures: Regional01fi,e • 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 an 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 immediately repaired. BMP Element Potential Problem How will I remediate Action Taken the problem: The entire BMP Trash/Debris is present. Remove the No trash was present trash/debris around the BMP, but some cardboard was seen in the forebay. i asked the contractor to remove the cardboard The perimeter of the Areas of bare soil Regrade the soil if None wet basin and/or erosive gullies necessary to remove have formed the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer Vegetation is too short Maintain vegetation at None or too long a height of approximately six inches Location: Mocksvile DG Date of Inspection: June 1, 2011 Potential Problem: How will I remediate Action taken the problem: BMP element The inlet device: The pipe is Unclog the pipe. None, pipe was clear pipe or swale clogged Dispose of the sediment offsite The pipe is Replace the pipe None cracked or otherwise damaged Erosion is Regrade the swale if Erosion had been noted occurring in the necessary to smooth previously and the contractor swale over and provide has cleared out the inlet swale erosion control and will attempt to stabilize devices such as with a grass and mesh system. reinforced turf matting or riprap to avoid future problems with erosion The forebay Sediment has Search for the source None accumulated to a of the sediment and depth of greater remedy the problem than the original if possible. Remove design for the sediment and sediment storage dispose of it in a location where it will not cause impacts to streams or the BMP Erosion has Provide additional Erosion had been noted occurred erosion protection previously and the contractor such as reinforced has installed a grass and mesh turf matting or riprap system to correct. The system to avoid future appears to be stabilizing the problems with bank and will continue to be erosion monitored Weeds are present Remove the weeds, Minimum weeds were present preferably by hand. If pesticide is used, wipe it on rather than spraying. Location: Mocksvile DG Date of Inspection: June 1 2011 BMP element Potential How will I remediate Action taken Problem: the problem: The vegetated Best professional Prune according to No action needed shelf practices show best professional that pruning the is practices needed to maintain optimal plant health Plants are dead, Determine the source No action needed diseased or dying of the problem: soils, hydrology, disease, etc. Remedy the problem and replace the plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present Remove the weeds, Landscaper pulled weeds preferably by hand. If pesticide is used, wipe it on rather than spraying. The Main Sediment has Search for the source None Treatment area accumulated to a of the sediment and depth of greater remedy the problem than the original if possible. Remove design for the sediment and sediment storage dispose of it in a location where it will not cause impacts to streams or the BMP Algal growth Consult a professional. N/A covers 50% of the to remove and area control agal growth Cattails, Remove the plants by None phragmites or wiping them with other invasive pesticide(do not plants cover 50% Spray) of the basin surface Location: Mocksvile DG Date of Inspection: June 1, 2011 BMP element Potential Problem: How will I remediate Action taken the problem: The embankment Shrubs have Remove shrubs None started to grow on immediately the embankment Evidence of Use traps to remove None muskrat or beaver muskrats and consult activity is present an expert to remove beavers. A tree has started Consult a dam safety None to grow on the specialist to remove embankment the tree An annual Make all needed inspection by an repairs appropriate professional shows that the embankment needs repair (if applicable) The outlet device Clogging has Clean out the outlet Outlet clear occurred device. Dispose of the sediment off site The outlet device Repair or replace the None is damaged outlet device. The receiving Erosion or other Contact the BNC None water signs of damage Division of Water have occurred at Quality Regional the outlet Office or the 401 Oversight Unit at 919- 733-1786 The following pages will contain photos taken of the each of the BMP elements and any action that is recommended during the ins ection Inspection completed by: .� ••4�i " RE �... „' »:.,r ..�� .,., • of ' � •' f Ir�1 �'tis '� n• { �rr fi4 _ . 17 41 OR '� w . • �R' ' � � � � , t y �' r'S f., y. { ��� ' � r� '�'w. � ' f f�i,��"�4"��•�i��- , a ji.�� y r tea., 1N•`'f - . .7 � Y.,Li71� rw 'r� c :, rx■ca nyi' " ct'rC .._'�V. a��: rd�'.. �nr�� �� _. - l�f: y %"'�'.'f/NeZ :.'�' "��Cr ��h •. r' •,3 �j��5..:'��;�'��:.� �'`` �" is 9+ _. � i�;,"p i ��;,�� ` „t,Ir. � L + `" � ,tya. - +l" �i�t �.�• �i_�}`J'l°'t.!i `r� C5 t ' �� !.� ' .� '",'� rd� -.� Nr 1r�- y t ,F� `�'� ,�'�.-Y �*A ��r �,r } t >ea ��y ► > ' � • � '' F �1 � �.r - �'' - r o �. � � .T � y-tl 4;tr tit'!r� > c#, A it 'afC:v'i��Rvr'}cv r '` Fr r �,i " r,r -� tier :JF]{ •._ I 4 • .... � i.;. tiA - �� ° i �r 1 ,eye,"I� ;''1 k�� 1S ,'�1.,� 'A �.+." lit _ s r� �lMp�r • 'r . -'hr'i��������"�rl Y1 (�p'1!,� -.I• "1Fy' � •'. 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Dect. of ENR I MAY 1. 9 2010 Winston-Salem Regional office I, ? e" f Lwas a duly registered?4-c</Ond %lath' in the State of North Carolina, having been authorized to observe (perio Iy/ weekly/ full time) the construction of the project, 2)e7'�w aene-eo-l- (Project) for _ Pe-,i f -g 7.ro,Pe-r— -C , LLC - (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: we - Signature Registration Number Date Z.&C eer�r iti�• 1!r �\ 0 1fif7Q4p1f I S4hww 24434 6'G'lNti��' qua E. Lp �f'+aeeertiei�,<� Page 5 of 6 State Stormwater Permit Permit No.SW4090903 Certification Requirements: f1. The drainage area to the system contains approximately the permitted / acreage. t/ 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built7t.1pon 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. :Z:5. The outlet/bypass structure elevations are per the approved plan. __Vl" 6. The outlet structure is located per the approved plans. V 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, /15. and a forebay. The required system dimensions are provided per the approved plans. Please submit this Designer's Certification to: Winston-Salem Regional Office Surface Water Protection 585 Waughtown Street Winston-Salem, NO 27107 and: DWQ Central Files 1617 Mail Service Center Raleigh, NO 27699-1617 Page 6 of 6 Cv A izL*A. CR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor Mr. Frank Fawcett PRIMAX PROPERTIES, LLC 1065 E. Morehead St., 4th Floor Charlotte, NC 28204 Division of Water Quality Coleen H. Sullins Director September 25, 2009 Subject: Stormwater Permit No. SW4090903 Dollar General High Density Commercial Wet Pond Project Davie County Dear Mr: Fawcett: Dee Freeman Secretary N.C. 09pt, of ENR SEP 3 0 2009 Wington•Saiem Regional DMce The Stormwater Permitting Unit received a complete Stormwater Management Permit Application for Dollar General in Mocksville on September 9, 2009, and additional information on September 14, 2009, Staff review of the plans and specifications has determined. that the project, as proposed, will comply with the Stormwater Regulations set forth in Title_ 15A NCAC 2H.1000 and Session Law 2006-246. We are forwarding Permit No. SW4090903, dated September 25, 2009, for the construction, operation and maintenance of the subject project and the stormwater BMPs. This permit shall be effective from the date of issuance until September 25, 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 inspection 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. , This project will be kept on file at the Winston-Salem Regional Office. If you have any questions, or need additional information concerning this matter; please contact Robert Patterson at (919) 807-6375; or robert.patterson@ncdenr.gov. Sincerely, 1,11< P"r_,A_ .fa• Coleen H. Sullins Wetlands and Stormwater Branch One 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 NorthCarolina Location. 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-63001 FAX: 919-807-64941 Customer Service: 1-877-623-6748 / �/atu�'�!`l/ Internet: www.ncwaterqual;ty.org v An Equal Opportunity 4 Affirmative Action Employer Mr. Frank Fawcett S W4090903 — Dollar General - Mocksville September 25, 2009 CC' Winston-Salem Regional Office Central Files SPU Files 0 Page 2 of 2 State Stormwater Permit Permit No.SW4090903 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 PRIMAX PROPERTIES; LLC Dollar General US Hwy 601 (approx. 500' south of Koontz Rd.), Mocksvflle, Davie County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 and S.L. 2006-246 (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 September 25, 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 1.6 on page 3 of this permit. The stormwater control has been designed to handle the runoff from 28,934 square feet of impervious area. 3. The tract will. be limited to the amount of built -upon area indicated on page 3 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. Page 1 of 6 State Stormwater Permit Permit No.SW4090903 6. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, acres: 1.1 Onsite, ft : 47,916 Offsite, ft2: 0 0 G. d, e. f. 9. J. 1. m n. o. Total Impervioys Surfaces, ft2: Buildings ft Roads/Parking, ft2: Sidewalk ft Offsite, ft Pond Depth, feet: TSS removal efficiency: Design Storm: Permanent Pool Elevation, FMS: Permitted Surface Area @PP ft Permitted Storage Volume, ft�: Storage Elevation, FMSL: Controlling Orifice: Permanent Pool Volume, ft3: Forebay Volume, W: Receiving Stream/River Basin: Stream Index Number: Classification of Water Body: II. SCHEDULE OF COMPLIANCE 28,934 9,014 18,442 1,478 0 3.0 90% 1.0 inch 836.5 3,775 2,812 at temporary pool 837.1 1.0" 0 pipe 7,325 1,514 UT of Elisha Creek 1 Yadkin Pee -Dee 12-102-15 11C11 1. 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. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. 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. Mowing 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 outlet structure, orifice device, flow spreader, catch basins and piping..' g. Access to the outlet structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. 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. Page 2 of 6 State Stormwater Permit Permit No.SW4090903 6. 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. 7. 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. 8. Access to the stormwater facilities shall be maintained via appropriate . easements at all times. 9. 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. 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 for a minimum of ten years from the date of the completion of construction: 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 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. 2. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Page 3 of 6 State Stormwater Permit Permit No.SW4090903 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.The permittee shall submit a.renewal request with all required forms and documentation at least 180 days prior to the expiration date of this permit. Permit issued this the 25th day of September, 2009. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for uoieen H. 5uiifns, uirector Division of Water Quality By Authority of the Environmental Management Commission Page 4 of 6 State Stormwater Permit Permit No.SW4090903 Dollar General Stormwater Permit No. SW4090903 Davie Count Designer's Certification 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 Page 5 of 6 State Stormwater Permit ' Permit No.SW4090903 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. Please submit this Designer's Certification to: Winston-Salem Regional Office Surface Water Protection 585 Waughtown Street Winston-Salem, NC.27107 and: DWQ Central Files 1617 Mail Service Center Raleigh, NC 27699-1617 Page 6of6 Compliance Inspection Report Permit: SW4090903 Effective: 09/25/09 Expiration: 09/25/19 Owner: Primax Properties LLC- Frank Fawcett Project: Dollar General County: Davie US Highway 601 Region: Winston-Salem Contact Person: Matthew E Lowder Title: Directions to Project: Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 001 - (Elisha Creek) (03-07-05 ) ( C) On -Site Representative(s): Related Permits: Inspection Date: 06/2012011 Entry Time: 10:00 AM Primary Inspector: Sue L Homewood Secondary Inspector(s): Robert D Patterson Brian Lowther Reason for Inspection: Fallow -up Permit Inspection Type: State Stormwater Facility Status: 0 Compliant ® Not Compliant Question Areas: ® State Stormwater (See attachment summary) Mocksville NC 27028 Phone: 919-553-6570 Exit Time: 10:30 AM Phone: 336-771-4964 Phone: Phone: Inspection Type: Compliance Evaluation Page: 1 Permit: SW4090903 Owner - Project: Primax Properties LLC- Frank Fawcett Inspection Date: 06/20/2011 Inspection Type: Compliance Evaluation Reason for Visit: Follow-up Inspection Summary: Followup visit to discuss NOV with Permittee. No changes to site other than wet pond is completely dry. Page: 2 Compliance Inspection Report Permit: SW4090903 Effective: 09/25/09 Expiration: 09/25/19 Owner: Primax Properties LLC- Frank Fawcett Project: Dollar General County: Davie US Highway 601 Region: Winston-Salem Contact Person: Matthew E Lowder Title: Directions to Project: Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 001 - (Elisha Creek) (03-07-05) ( C) On -Site Representative(s): Related Permits: Mocksville NC 27028 Phone: 919-553-6570 Inspection Date: 12/19/2011 Entry Time: 11:00 AM Exit Time: 11:15 AM Primary Inspector: Sue L Homewood Secondary Inspector(s): Robert D Patterson Brian Lowther Reason for Inspection: Follow-up Permit Inspection Type: State Stormwater Facility Status: C] Compliant ® Not Compliant Question Areas: ® State Stormwater (See attachment summary) Phone: 336-771-4964 Phone: Phone: Inspection Type: Compliance Evaluation Page: 1 Permit: SW4090903 Owner - Project: Primax Properties LLC- Frank Fawcett Inspection Date: 12/19/2011 Inspection Type: compliance Evaluation � Reason for Visit: Follow-up inspection Summary: Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? Q ■ ❑ ❑ Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ 0 0 upon request? Comment: Pond does not have the minimum permanent storage volume. Side scopes of pond are bare and berm between forebay and pond eroding. No need to address lack of volume at this time, pond appears to operate as an infiltration basin except during high flow events. Page: 2 Compliance Inspection Report Permit: SW4090903 Effective: 09/25/09 Expiration: 12/30/21 Owner: Primax Properties LLC- Frank Fawcett Project: Dollar General County: Davie US Highway 601 Region: Winston-Salem Contact Person: Matthew E Lowder Title: Directions to Project: Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 001 - (Elisha Creek) (03-07-05) ( C) On -Site Representative(s): Related Permits: Inspection Date: 0610312013 Entry Time: 11:30 AM Primary Inspector: Sue L Homewood Secondary Inspector(s): Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: ■ Compliant ❑ Not Compliant Question Areas: State Stormwater (See attachment summary) Mocksville NC 27028 Phone: 919-553-6570 Exit Time: 11:45 AM Phone: 336-771-4964 Inspection Type: Compliance Evaluation Page: 1 Permit: SW4090903 Owner - Project: Primax Properties LLC- Frank Fawcett Inspection bate: 06/03/2013 inspection Type: Compliance Evaluation Reason for Visit: Routine Inspection Summary: Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? ■ n n ❑ Are the SW t3MP inspection and maintenance records complete and available for review or provided to DWQ ■ upon request? Comment: Other Permit Conditions Is the site compliant with other conditions of the permit? Comment: Other WQ Issues ■ n n n Is the site compliant with other water quality issues as noted during the inspection? ■ Comment: Page: 2 Compliance Inspection Report Permit: SW4090903 Effective: 09/25/09 Expiration: 09/25/19 Owner: Primax Properties LLC- Frank Fawcett Project: Dollar General County: Davie US Highway 601 Region: Winston-Salem Contact Person: Matthew E Lowder Title: Directions to Project: Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 001 - (Elisha Creek) (03-07-05) ( C) On -Site Representative(s): Related Permits: Inspection Date: 0511912011 Entry Time: 01:00 PM Primary Inspector: Sue L Homewood Secondary Inspector(s): Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: Q Compliant O Not Compliant Question Areas: E State Stormwater (See attachment summary) Mocksville NC 27028 Phone: 919-553-6570 Exit Time: 01:30 PM Phone: 336-771-4964 Inspection Type: Compliance Evaluation Page: 1 Permit: SW4090903 Owner - Project: Primax Properties LLC- Frank Fawcett Inspection Date: 05/19/2011 .Inspection Type: Compliance Evaluation Reason for Visit: Routine Inspection Summary: File Review Yes No NA N Is the permit active? n n n Signed copy of the Engineer's certification is in the file? e n ❑ n Signed copy of the Operation & Maintenance Agreement is in the file? ® n n n Copy of the recorded deed restrictions is in the file? n n n ■ Comment: Built Upon Area Yes No NA NE Is the site BUA constructed as per the permit and approval plans? m n Q n Is the drainage area as per the permit and approved plans? ■ n n n Is the BUA (as permitted) graded such that the runoff drains to the system? n ■ Comment: site missing curbing and swale to direct runoff to the BMP. SW Measures Yes No NA NE Are the SW measures constructed as per the approved plans? n ■ n n Are the inlets located per the approved plans? S n n n Are the outlet structures located per the approved plans? ® n n Comment: outlet structure does not match approved plans. pond not holding water, unclear why during inspection. Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? M ❑ n n Are the SW BMP inspection and maintenance records complete and availabie for review or provided to DWQ n n n upon request? Comment: site had been repaired recently. Other Permit Conditions Yes No NA NE Is the site compliant with other conditions of the permit? ® n n n Comment: Other WQ Issues Yes No NA NE Is the site compliant with other water quality issues as noted during the inspection? o n n Cl Comment Page: 2 ,S,�j�og D qo 3 PRIM&X PROPERTIES, LLC 1 September 10, 2009 tn. on ` NCDENR DivisionQualityater Quality ' Stormwater Permitting Unit 1617 Mail Service Center' o "" Raleigh, NC 27699-1617 RE: Dollar General — Mocksville, NC — PIN # 5739123578 To Whom It May Concern: Please accept this letter as written authorization for Frank Fawcett of Primax Properties. L[_C. to sign as applicant/owner on behalf of 1'rimax Properties. LIX, proposed owner of the site located just off' Hwy 601 North in Mocksville. Davie County Tax Map Number 1-140000008801/NC Pin 4 57-19123578. Thank you for )'our assistance and should you have any questions, please do not hesitate to give me a call. State ol'North Carolina County of Mecklenburg PR1MAX PROP[ R'I'IES. LL. William eyn ur Manager L. L. C. Acknowledgment I certify that before me appeared this day William G. Seymour. a person known to me, who after being sworn stated he is Manager of• Primax Properties. 1-[1C, a North Carolina limited liability company and is duly authorized to act on belialf of"said Company, and being informed ofthe contents thereof, acknowledged execution of'the foregoing instrument on behalf of said Company. 1Ai ens ;j��id and official seal, this 10 clay of P7{i`18 . 200. y public /-�. !'J� . Notary Public t0rY pub f�tes � _ ? MyGa0t81�pla Ir �.¢E (,� ,[�s (Printed Name of Notary) My ComifiQr[j 1lC�►�mores: 1065 East Morehead Street • 4th Floor • Charlotte, NC 28204-2812 9 704-344-8200 9 704-344-8288 Fax DWQTSE ONLY to ecewePee Paid Permit Number 9 sos-� sW o o3 State of North Carolina Department of Environment and Natural Resources Division of Water Quality COPY STORMWATER MANAGEMENT PERMIT APPLICATION This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): 2. Print Owner/Signing Official's name and title (person legally responsible for facility and com Frank Fawcett - Project Manager 3. Mailing Address for person listed in item 2 above: 1065 E. Morehead Street 4 h Floor 0 N c n_ nnn_ , Cn City:Charlotte State:NC Zip:28204 Phone: (704 } 954-7229 _ _ Fax: (704 L 344-8288 Email:ffawcetftrimaxpropgrfies.com 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Dollar General 5. Location of Project (street address): US Highway 601 City:Mocksville County:Davie Zip. 6. Directions to project (from nearest major intersection): Approximately 500 feet south of the intersection of US Highway 601 & Koontz Road 7. Latitude:35° 55' 02" N Longitude:80° 34' 59" W of project 8. Contact person who can answer questions about the project: Name:Matthew E. Lowder, PE Telephone Number: (919 ) 553-6570 Einail.mlowder@embaEqmail.com IL PERMIT INFORMATION: 1. Specify whether project is (check one): ®New ❑Renewal ❑Modification 2. 3. 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) Specify the type of project (check one): Low Density ®High Density ❑Redevelop OGeneral Permit []Universal SMP ❑Other 4. AdditionaI Project Requirements (check applicable blanks; information on required state permits can be Fonn SWU-101 Version 09.25.08 Pagel of4 r � Rhe . -. .y :3 t tr 1 l obtained by contacting the Customer Service Center at 1-877-623-6748): [:]LAMA Major ®Sedimentation/Erosion Control 0404/401 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 pro'osed to treat stormwater runoff from the proposed commercial development.The site is desi ed to treat a 1.0" storm at 90% TSS 2. Stormwater runoff from this project drains to the Yadkin River basin. 3. Total Property Area-.1.59 acres 4. Total Coastal Wetlands Area: 0 acres 5. Total Property Area (3) - Total Coastal Wetlands Area (4) = Total Project Area**:1.59 acres 6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA): _ 2 % 7. How many drainage areas does the project have?1 8. Complete the followin.& 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 Informatlon Drainage Area 1 Drainage Area Receiving Stream Name Elisha Creek Stream Class K Index No. tZ-10Z_t5 Total Drainage Area (so 47,916 -site Drainage Area s47,916 Ott -site Drainage Area s Existing impervious Area (sf) 4,800 Proposed Impervious Area (so 25,934 % Impervious Area (total) Impervious Surface Area ramage Area 1 Mainage Area -site Buildings (so 9,014 -site Streets s Ui�-site Parking s--1-8,442 -site Sidewalks (sf), Offier on-site(so 0 Off -site s Total—(sUF 29,934 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 ifyou 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, outparcels 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 f/h2o.enr..state.nc.us/sulbmp forms.htm -_deed restrictions. Form DRPC-1 High Density Commercial Subdivisions Form DRPG-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 prope 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 httpalh?o.enr.state.nc.us/su/bmp forms.htm. Form SW401-Low Density Form SW401-Curb Outlet System Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-Infiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cell Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401-Sand Filter Form SW401-Permeable Pavement Form SW401-Cistern Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bioretention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement Sand Filter Supplement Permeable Pavement Supplement 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 packa$e should be submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the interactive online map at ht!p://h2o.enr.state.ne.us/,sti/msi_maps.him) 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 Covenants Form (if required as per Part IV above) • 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 a pp ble soils report • Two copies or plans and specifications (sealed, signed & dated), including: - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundaryry - Location map with named streets or MR 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 Address: City: _ State: Zip: Phone: ). _ Fax: ) Email: VIII. APPLICANT'S CERTIFICATION 1, (print or type name of person listed in General Information, item 2) Frank Fawcett 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 at the proposed project complies with the requirements of 15A NCAC 2H .100t� 1 A "-I AP Signature: Date: 0, 'Z .Q Form SWU-101 Version 09.25.08 Page 4 of 4 ,sv✓L"0903 PRI PROP ERTIES, LLC September 2, 2009 NCDENR Division of Water Quality Stormwater Permitting Unit 1617 Mail Service Center Raleigh, NC 27699-1617 919-807-6300 Subject: Dollar General Re: Stormwater Application To Whom It May Concern: Please find enclosed the following: 2 sets of civil drawings 2 stormwater permit application (1 copy & 1 original) 1 Wet -Pond supplement 1 Wet -Pond 0&M Agreement 1 Permit Fee ($505.00 made to NCDENR) • 2 Calculations Please feel free to contact me if you have any questions. Thank you! Best Regards, Primax Properties, LLC Jonathan Greene 1065 East Morehead Street, 4"' Floor Charlotte, NC 28204 704-996-7944 cell 704-344-8288 fox 1065 East Morehead Street • 4th Floor • Charlotte, NC 28204-2812 - 704-344-8200 • 704-344-8288 Fax r _ 1 Permit Number: S W (-t0io % 3 (to be provided by DWQ) Drainage Area Number: I Wet Detention Basin 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. 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): ❑ 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. approximatel six inches. Form SW401-Wet Detention Basin 0&M-Rev.4 Page I of 4 Permit Number: S PV'Y0`3.0 9. O 3 (to be pr1 7vided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the Swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the Swale if necessary to Swale, smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. 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. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a -depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth, dispose of it in a location where it will not cause impacts to streams or the BMP. - Algal growth covers over Consult a professional to remove 50 % of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray), the basin surface. Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4 4 Permit Number. A/ktO `j d ':�d 3 (to be provided by DWQ) Drainage Area Number:__ I BMP element: Potential roblem: How I 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 annual 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 831 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 833 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 836.5 Sediment Removal . 833 I jPe anen ------------ • -Volume Bottom Elevatio 832 -ft in. Sediment Storage FOREBAY Pool Sediment Removal Elevation 831 Volume Bottom Elevation 830 [11-ft n. Sedimen Storage MAIN POND Form SW401-Wet Detention Basin O&M-Rev,4 Page 3 of 4 Permit Number. S h% 'Va9,0 203 (to be provided by DWQ) 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 name0oll ar General BMP drainage area number: I Print name:Frank Fawcett - Primax Properties, LLC Title:Project Manager Address:1065 E. Morehead Street, 4`" Floor Charlotte, NC 28204 PI - Si lid 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. I, �� ���. �[} 1/]F' �, a Notary Public for the State of Dlrr-�Car(�I�n/,�County of , do hereby certify that II personally appeared before me this 2 day of T , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, �J Fs J . Notary Public Meeklehburg County My Comenisslon Expires 06/05/2013 +Cr0,O� SEAL My commission bxpires_ Tvoc 5 Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 Permit No. W 0 0 03 #o be provided by DWQ) HCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be fitted out, printed and submitted. The Required Items Checklist (Part III) must be printed, fitted out and submitted along with all of the required information. I: PROJECT =INFORMATION :. 7r�-�34C r. X.tr'.a::�ti'�'�:�ehr�7,�;t�ia'�%�r,d,i�PlKst;4"5�df.,1��.�tl�t4• Project name Dollar General Contact person Matt Lowder, PE Phone number 919-553.6570 Date 8t3112009 Drainage area number 1 EL-, DESIGN INFORMATION :'E'er.-.' .,.: g 3 ;� � �,err,:�.��^i•�.-r,M_.._�•���'�€�,h��,�,.`�:.r�'�,a���.��«,�vx.�...;�a� Site Characteristics Drainage area 47,916 fe Impervious area, post -development 28,934 ft °% impervious 60.38 e% Design rainfall depth 1.0 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 prelpost control of the 1yr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr stone Pre -development 1-yr. 24-hr peak flow Post -development 1-yr, 24-hr peak flaw 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 1Oft vegetated shelf elevation Bottom of 1 Oft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stored above the'state-required temp. pool? Elevation of the top of the additional volume 2,370 ft3 OK 2,812 ft3 OK, volume pravided.is equal to or in excess of volume required. ft3 ft3 Oft ft3 y (Y or N) 2.8 in 0.50 (unitless) 0.80 (unifless) 0,12 inlhr OK 4,03 ft3lsec 2.10 ft3lsec -1.93 ft3lsec 837.10 fmsl -836:00-fmsk fmsl 837.00 fmsl 836.00 fmsl 831.00 fmsl 830.00 fmsl I.00 ft (Y or N) fmsl Form SW401-wet Detention Basin-Rev.6-212ata9 Parts I. & II. Design Summary, Page 1 of 2 Permit No. SW�d�oo3� (to be provided by D WO} i II. DESIGN INFORMATION Surface Areas Area, temporary pool 3,775 ftz Area REOUIRED, permanent pool 1,682 ftz SAIDA ratio 3.51 (unitless) Area PROVIDED, permanent pool, A,.,, 3,775 ft' OK Area, bottom of 1Oft vegetated shelf, Ant w�r 2,640 f' Area, sediment cleanout, top elevation {bottom of pond), A,,`P,, 179 fe Volumes Volume, temporary pool 2,812 ft' OK Volume, permanent pool, Vv ,jxcj 7,325 ft' Volume, forebay (sum of forebays ff more than one forebay) 1,514 113 Forebay % of permanent pool volume 20.7% % OK SAIDA Table Data Design TSS removal - 90 % Coastal SAIDA Table Used? N (Y or N) MountainlPiedmoat SAIDA Table Used? Y (Y or N) SAIDA ratio 3.51 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) N (Y or N) Volume, permanent pool, Vp , _vm ft3 Area provided, permanent pool, Ap..pw ftz Average depth calculated R Average depth used in SAIDA, d. (Round to nearest 0.5ft) ft CatculaCion option 2 used? (See Figure 10-2b) Y (Y or N) Area provided, permanent pool, Aw mr w 3,775 ft' OK Area, bottom of 10R vegetated shelf, AL,,,,# 2,640 ftz OK Area, sediment cleanout, top elevation (bottom of pond), Ab t_,, 179 ft' OK 'Depth' (distance blw bottom of 10ft shelf and top of sediment) 5.00 ft OK Average depth calculated . 3.09 ft OK Average depth used in SAIDA, d,,, (Round to nearest 0.51t) 3.0 ft OK Drawdown Calculations Drawdown through orifice? Y (Y or N) Diameter of orifice (if circular) 1.00 in Area of orifice (if -non -circular) in Coefficient of discharge (CD) 0.60 (unitless) Driving head (Ho) 0.20 ft Drawdown through weir? N (Y or N) Weir type (unitless) Coefficient of discharge (C) (unitless) Length of weir (L) It - Driving head (H) It Pre -development 1•yr, 24•hr peak flow 4,03 ft'lsec OK Post -development 1-yr, 24-hr peak flow 2.10 ft'Isec Insufficient post -development peak flow. . Storage volume discharge rate (through discharge orifice or weir) 0.02 It Isec Storage volume drawdown time 2.27 days OK, draws down in 2-5 days. OK, drawdown time is correct. Additional information Vegetated side slopes 3 :1 OK Vegetated shelf slope 10 :1 OK Vegetated shelf width 10.0 R 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 2.5 R OK Vegetated filter provided? Y (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-wet Detention Basin-Rev.6-2120109 Parts I. & R. Design Summary, Page 2 of 2 Permit No. .Sh/-ogao 3 (to be provided by DWQ) III , REQUIREDATEMS CHECKL.ISTF4 k ; r 4" 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. Page/ Plan Initials Sheet No. mf-L 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. - %n�L 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. 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. 4. If the basin is used for sediment and erosion control during construction,. clean out_of the basin is specified on the plans prior to use as a wet detention basin. M51— ,,,, ff crfC$ 5. A table of elevations, areas, incremental volumes & accumulated volumes for-overaR pond and for Forebay, to verify volume provided. m i� e— C„ 5 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. 7. The supporting calculations, vh f L ✓ 8. A copy of the signed and notarized operation and maintenance (O&M) agreement..' , e� N� 9. A copy of the deed restrictions (if required). .ye L S 10. A soils report that is based upon an actual field investigation, sal borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.6-2120109 Part III. Required Items Checklist, Page 1 of 1