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HomeMy WebLinkAboutSW8090118_CURRENT PERMIT_20090209STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 DOC TYPE $ CURRENT PERMIT ❑ APPROVED PLANS '❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2 Q G °10 2 a cI YYYYMMDD ®'. NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Governor Director February 9, 2009 Kermit E. Austin, Jr., President K. E. Austin Corporation 3301 Burnt Mill Drive Wilmington, INC 28403 Subject: State Stormwater Management Permit No. SW8 090118 K. E. Austin Corporation High Density Commercial Wet Detention Pond Project - Out parcel Brunswick County Dear Mr. Austin Dee Freeman Secretary The Wilmington Regional Office received a complete Stormwater Management Permit Application for K. E. Austin Corporation on February 5, 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 2008-211. We are forwarding Permit No. SW8 090118 dated February 9, 2009, for the construction of the subject project. . This permit shall be effective from the date of issuance until February 9, 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 M.J. Naugle, or me at (910) 796-7215. Sincerely, ft ' •S6 Georgette cott Stormwater Supervisor Division of Water Quality GDS/ mjn: S:\WQS\STORMWATER\PERMIT\090118 feb09 cc: J. Carmine, P.E., Coastal Land Design, PLLC, 910-254-9333, fax: 0502 Brunswick County Building Inspections City of Belville Stormwater Services Jeff Phillips, Brunswick County Engineering CWilmington Regional Office% Central Files, M.J. Naugle Wilmington Regional Office 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 Phone: 910-796-72151 FAX: 910-350-20041 Customer Service: 1-877-623-6748 �rOne L v O rtI h I Carat l R a Internet: vnnv.nmaterquality.org Naturally An Equal Opportunity 1 Affirmative Action Employer State Stormwater Management Systems Permit No. SW8 090118 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY COMMERCIAL OUTPARCEL 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 Kermit E. Austin, Jr. and K.E. Austin Corporation K. E. Austin Corporation 170 Poole Road, Belville, Brunswick County FOR THE construction, operation and maintenance of one wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 and Session Law 2008-211 (hereafter collectively referred to as the "stormwater rules') 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 February 9, 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 1.10 on page 3 of this permit. The stormwater control has been designed to handle the runoff from 418,200 square feet of impervious area. The out parcel subdivision is permitted for seven (7) lots. Lots numbered 1 — 5 are each allowed 69,700 square feet per lot of built -upon area and Lots numbered 6 - 7 are each allowed 34,850 square feet per lot of built -upon area. 3. A 50 foot wide vegetative buffer must be provided adjacent impounded structures, streams, rivers and tidal waters. 4. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of this permit. 5. The discharge of this wet detention pond does not require a vegetated filter strip. 6. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. The built -upon area for the future development is limited to 418,200 square feet. Page 2 of 9 State Stormwater Management Systems Permit No. SW8 090118 7. 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. 8. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 9. Each lot within the subdivision, whose ownership is not retained by the permittee, must submit a separate Offsite Stormwater Management Permit application package to the Division of Water Quality and receive a permit prior to any construction on the lot 10. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, acres: 14.2 Onsite, ftZ: 615,000 Offsite, ft2: none b. Total Impervious Surfaces, ftZ: 418,200 Future Out parcel lots 1-7, ftZ: 418,200 C. Design Storm, inches: 1.5 d. Average Pond Design Depth, feet: 4.4 e. TSS removal efficiency: 90% f. Permanent Pool Elevation, FMSL: 23.6 g. Permanent Pool Surface Area, ftZ: 35,723 h. Permitted Storage Volume, ft3: 73,280 i. Temporary Storage Elevation, FMSL: 25.1 j. Pre-dev. 1 yr-24 hr. discharge rate, cfs: 6.9 k. Controlling Orifice: 4 "0 pipe I. Orifice flow rate, cfs: 0.28 M. Permitted Forebay Volume, ft3: 34,065 n. Fountain Horsepower '/2 HP o. Receiving Stream/River Basin: Jackey's Creek/ Cape Fear P. Stream Index Number: 18-77-3 q. Classification of Water Body: "C;Sw" II. SCHEDULE OF COMPLIANCE 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. No lot owner/developer shall fill in, alter, or pipe any drainage feature (such as swales) shown on the approved plans as part of the stormwater management system without submitting a revision to the permit and receiving approval from the Division. 3. The permittee is responsible for verifying that the proposed built -upon area for the entire lot, including driveways and sidewalks, does not exceed the allowable built -upon area. Once the lot transfer is complete, the built -upon area may not be revised without approval from the Division of Water Quality, and responsibility for meeting the built -upon area limit is transferred to the individual property owner. 4. If an Architectural Review Board or Committee is required to review plans for compliance with the BUA limit, the plans reviewed must include all proposed built -upon area. Any approval given by the Board do not relieve the lot owner or permittee of the responsibility to maintain compliance with the permitted BUA limit. 5. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. Page 3 of 9 State Stormwater Management Systems Permit No. SW8 090118 6. 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. 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. 7. 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. 8. Decorative spray fountains will be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain must draw its water from less than 2 foot below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. c. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for a fountain in this pond is Y: horsepower. 9. 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. 10. 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. 11. 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. 12. Permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 13. Access to the stormwater facilities for inspection and maintenance shall be maintained via appropriate recorded easements at all times. 14. Prior to the construction of any permitted future areas shown on the approved plans, the permittee shall submit final site layout, drainage and grading plans to the Division for approval. 15. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 16. This permit shall become void unless the facilities are constructed in accordance with the conditions of this permit, the approved plans & specifications, and other supporting data. Page 4 of 9 State Stormwater Management Systems Permit No. SW8 090118 17. 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 development, subdivision, acquisition, lease or sale of any, 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. 18. 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. 19. Prior to the sale of any lot, the following deed restrictions must be recorded: a. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW8 090118, as issued by the Division of Water Quality under NCAC 2H.1000 and Session Law 2008-211. b. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the Stormwater Management Permit. c. These covenants are to run with the land and be binding on all persons and parties claiming under them. d. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water Quality. e. Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division of Water Quality. f. The maximum built -upon area per lot is 69,700 square feet for lots numbered 1-5 and 34,850 square feet for lots numbered 6-7. This allotted amount includes any built -upon area constructed within the lot property boundaries, and that portion of the right-of-way between the front lot line and the edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. g. All runoff on the lot must drain into the permitted system. This may be accomplished through providing roof drain gutters, which drain to the street, grading the lot to drain toward the street, or grading perimeter swales and directing them into the pond or street. Lots that will naturally drain into the system are not required to provide these measures. h. Built -upon area in excess of the permitted amount will require a permit modification. i. Each lot within the subdivision whose ownership is not retained by the permittee, must submit a separate Offsite Stormwater Management Permit application package to the Division of Water Quality and receive a permit prior to any construction on the lot. j. If permeable pavement credit is allowed, the property owner must submit a request, with supporting documentation, to the permittee and receive approval prior to construction of BUA. k. A 50 foot wide vegetated buffer must be provided adjacent any impounded structures, streams, rivers and tidal waters on each lot. No built -upon area is allowed within this buffer. Page 5 of 9 State Stormwater Management Systems Permit No. SW8 090118 20. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of recording the plat, and prior to selling lots. The recorded copy must contain all of the statements above, the signature of the Permittee, the deed book number and page, and the stamp/signature of the Register of Deeds. 21. Prior to transfer of the permit, the stormwater facilities will be inspected by DWQ personnel. The facility must be in compliance with all permit conditions. Any items not in compliance must be repaired or replaced to design condition prior to the transfer. Records of maintenance activities performed to date will be required. III. GENERAL CONDITIONS This permit is not transferable to any person or entity except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a completed Name/Ownership Change Form signed by both parties, to the Division of Water Quality, accompanied by the supporting documentation as listed on page 2 of the form. The approval of this request will be considered on its merits and may or may not be approved. 2. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Neither the sale of the project nor the transfer of common area to a third party constitutes an approved transfer of the stormwater permit. 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 remains in force and effect until modified, revoked, terminated or renewed. 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. 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. 11. The permittee shall notify the Division of any name, ownership or mailing address changes at least 30 days prior to making such changes. Page 6 of 9 State Stormwater Management Systems Permit No. SW8 090118 12. The permittee shall submit a permit renewal request at least 180 days prior to the expiration date of this permit. The renewal request must include the appropriate documentation and the processing fee. Permit issued this the ninth day of February 2009. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION FcJLcc. � (Tclrr � r Colee Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Page 7 of 9 State Stormwater Management Systems Permit No. SW8 090118 K. E. Austin Corporation Stormwater Permit No. SW8 090118 Brunswick Countv Page 1 of 2 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 specifications: Signature Registration Number Date SEAL Page 8 of 9 State Stormwater Management Systems Permit No. SW8 090118 Certification Requirements: Page 2 of 2 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 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 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 and located 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. 16. All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDENR-DWQ Regional Office Brunswick County Building Inspections City of Belville Stormwater Services Page 9 of 9 Permit Number:5W'109 b I I? - Frg 0 5 2009 (to be provided y DWQ) Drainage Area Number: t 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 the problem 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 1 of 4 Permit Number: 5 uj 8 O gull 8 FES 0 5 2009 (to be provided 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 C Permit Number. Su_) p Wg0118 FE9 0 5 2009 (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem:' 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 6.60 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 5.60 feet in the forebay, the sediment shall be removed. Sediment Removal Bottom 18.0 ----------------- FOREBAY BASIN DIAGRAM (fill in the blanks) t-ft Min. Sediment Storage Permanent Pool Elevation 23.60 Pool Sediment Removal Elevation 17.0 Volume ----------------------- I ------ Bottom Elevation 16.0 1 1-ft N} n. Sediment Storage MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4 Permit Number: SLc3pgcz.,JI b FE9 0 5 2009 (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 name:K. E. Austin Corporation BMP drainage area Print name:Kermit E. Austin, Jr Title:President - K.E. Austin Corporation Address:3301 Burnt Mill Road, Wilmington, NC 28403 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. it A. c, , a%%a Notary Public for the State of J�4,fAikCA lrotl MA , County of 'Aew L16y J ry- do hereby certify that ytr14+ £, Mas+t A/ Jr • personally appeared before me this 3 r, day of F2�p y q r ••t ZOO , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, °®�P9SV \q,\sslo/y CIO NOTARY m V Pm 2 PUBUC y Zs 0 VER cOJ°°o SEAL My commission expires Qll a 2L 1, Z. C C ,' � r Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 i V i + + j OFFICE USE ONLY Permit W() — W d o State of North Carolina Department of Environment and Natural Resources Division of Water Quality FE5 0 b 2009 STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original 1. GENERAL INFORMATION: I. Applicant's name (specify the name of the corporation, individual, etc. who owns the project): K. E. Austin Corporation 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Kermit E. Austin, Jr— President 3. Mailing Address for person listed in item 2 above: 3301 Burnt Mill Drive City: Wilmington Phone: (910) 762 — 4700 State: North Carolina Zip: 28403 Fax: ( 910 ) 762 — 0075 Email: kaustin@gogas.net 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): K. E. Austin Corporation 5. Location of Project (street address): Approximate Address: 170 Poole Road City: Belville County: Brunswick Zip: 28451 6. Directions to project (from nearest major intersection): From intersection of Olde Waterford Way SE and US Highway 17: Go approximately 0.15 miles N W along Olde Waterford Way SE and turn left onto Poole Road. The project is approximately 0.20 miles on the right. 7. Latitude: 340 13' 07" N Longitude: 780 01' 28" W of project 8. Contact person who can answer questions about the project: Name: Kermit E. Austin, Jr. Telephone Number: ( 910 ) 762 — 4700 Email: kaustinggogas.net II. PERMIT INFORMATION: I. Specify whether project is (check one): ® New ❑ Renewal ❑ Modification Form: SWU-101 Version09.25.08 Page 1 of 4 :., Ruts 2008 - a i I FE9 0 5 2009 j)Ltr vt-A. L015 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 obtained by contacting the Customer Service Center at 1-877-623-6748): ❑ CAMA Major ® Sedimentation/Erosion Control ❑ 404/401 Permit ❑ NPDES Stormwater III. PROJECT INFORMATION I. 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. Stormwater will be treated by one conventional stormwater pond with an elongated forebay. 2. Stormwater runoff from this project drains to the Cape Fear River basin. 3. Total Property Area: 14.118 acres 4. Total Coastal Wetland Area: -0- acres 5. Total Property Area (3) — Total Coastal Wetlands Area (4) = Total Project Area**: 14.118 acres 6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA): 68.00 % 7. How many drainage basins 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 Drainage Area 1 Receiving Stream Name Jackeys Creek Receiving Stream Class & Index No. C; Sw 18-77-3 Total Drainage Area (so 615,000 ft2 On -Site Drainage Area (so 615,000 ft2 Off -Site Drainage Area (so -0- Existing Impervious* Area (so -0- Proposed Impervious* Area (sf) 418.200 ft2 % Impervious* Area (total) 68.00 % Impervious* Surface Area Drainage .Area I On -Site Buildings (sl) -0- On-Site Streets (sf) -0- On-Site Parking (sf) -0- On-Site Sidewalks (so -0- Other On -Site (so [FUTURE] 418,200 ft Off -Site (sf) -0- Total (so: 418,200 ft2 * 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 based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. Form: SWU-101 Version09.25.08 Page 2of4 How was the off -site impervious area listed above derived? There is no off -site drainage to this project. FE9 0 5 2009 LE Projects in Union County: Contact the DWQ Central Office staff to check to see ifyour project is located within a Threatened K Endangered Species watershed that may be subject to more stringent stornnvater requirements IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels, and future development prior to sale of any lots. If lot sizes vary significantly, a table listing each lot number, size, and the allowable built -upon area for each lost must be provided as an attachment. Form DRPC-I 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 deed restrictions and protective covenants for this project shall include all the applicable items required above, 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 State, 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 and General Permits Unit at (919) 733-5083 for the status and availability of these forms. 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-Grassed Swale Grassed Swale Supplement Form SW401-Sand Filter Sand Filter Supplement Form SW401-Permeable Pavement Permeable Pavement Supplement Form SW401-Cistern Cistern Supplement Form: SWU-101 Version09.25.08 Page 3of4 VL SUBMITTAL REQUIREMENTS F�c3 'D 2009 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 Regional Office. (Appropriate office may be found by locating project on the interacted online map at http://l12o.enr.state.nc.us/su/msi maps.htm) Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials • Original and one copy of the Stormwater Management Permit Application Form JRC • Original and one copy of the Deed Restrictions & Protective Covenants Form (ifrequired as per Part IV above) J 2C • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP a0& • Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD) payable to NCDENR • Calculations and detailed narrative description of stormwater treatment /management • Copy of any applicable soils report JKC. • Three copies of plans and specifications, including: J fu -Development/Project name -Engineer and firm -Legend -North Arrow -Scale -Revision number & date -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 oft -site), drainage easements, pipe sizes, runoff calculations -Drainage areas delineated -Vegetated buffers (where required) VIL AGENT AUTHORIZATION If you wish to designate submittal authority to another individual or firm so that they may provide information on your behalf, please complete this section: Designated agent (individual or firm): Coastal Land Design, PLLC Mailing Address: P.O. Box 1172 City: Wilmington State: North Carolina Zip: 28402 Phone: ( 910 ) 254 - 9333 Fax: ( 910 ) 245 - 0502 Email: jcarntinencoastallanddesign.net Vill. APPLICANT'S CERTIFICATION I, (print or type name ofperson listed in General Information, item 2) Kermit E. Austin, Jr. 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, *d that the Koposed&roject cpmplies with the requirements of 15A NCAC 2H .1000. Signature: Date: Form: SWU-101 Version09.25.08 Page 4of4 Permit No. SIi,J O UwlI� j (to be provitleA by DWg) FE9 0 5 2009 W A rz9q NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information. Project name K.E. Austin Corporation Contact person Kermit E. Ausin, Jr. - President of K.E. Austin Corp. Phone number (910) 462 - 4700 Date 22-Jan-09 Drainage area number #1 IL DESIGN INFORMATION':. Site Characteristics Drainage area 615,0001 ryz Impervious area, post -development - 418,200!ry2 % impervious 68.00 Design rainfall depth - 1.5'1in Storage Volume: Non -SA Waters Minimum volume required - 50,8911 rya OK Volume provided 73,2801 fit I OK, volume provided is equal to or in excess of volume required. 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 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 storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak Bow Pre/Post 1-yr, 24-hr peak Bow 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 Ift3 N I(Y or N) 3.81 in 0.40 (unitless) OAT (unitless) 6.25'; inlhr OK 6.90 ft3lsec ft3lsec 25.10!fmslif t4NT OF Ii Rtr10FF : 24.66 F/r1SL 23.60ifmsl 23.50;fmsl 24.101fmsl 23.10!fmsl Data not needed for calculation option #1, but OK if provided. 17.00'fmsl 16.00Ifmsl Data not needed for calculation option #1, but OK if provided. 1.00 ft N 1(Y cr N) r 25.1itfmsl OK Form SW401-Wet Detention Basin-Rev.5 Pans I. & 11. Design Summary, Page 1 of 2 Permit No. S w IV09 01 1O (to be proOderf by DWQ) rc3 0 5 2009 II. DESIGN INFORMATION Surface Areas I�Sl Area, temporary pool 53,M!9 ft2 Area REQUIRED, permanent pool SAIDA ratio Area PROVIDED, permanent pool, Ap _pw Area, bottom of 1 Oft vegetated shelf, Ayo, mil Area, sediment cleanout, top elevation (bottom of pond), Aya I. Volumes Volume, temporary pool Volume, permanent pool, Vm,,,, . Volume, forebay (sum of forebays if more than one forebay) Forebay % of permanent pool volume SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? MountainuPiedmont SAIDA Table Used? SAIDA ratio Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Volume, permanent pool, Vp„ryool Area provided, permanent pool, A.. Average depth calculated Average depth used in SAIDA, d„, (Round to nearest 0.5ft) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, A.. Area, bottom of 1Oft vegetated shelf, A. y,¢i, Area, sediment cleanout, top elevation (bottom of pond), A,,,. "Depth' (distance btw bottom of 1Oft shelf and top of sediment) Average depth calculated Average depth used in SAIDA, d.., (Round to nearest 0.5ft) Drawdown Calculations Drawdown through orifice? Diameter of orifice (if circular) Area of orifice (if -non -circular) Coefficient of discharge (Ca) Driving head (He) Drawdown through weir? Weir type Coefficient of discharge (C.) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak Flow Post -development 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width ratio Length to width ratio Trash rack for overflow & onfice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all runoff at ultimate build -out? Drain mechanism for maintenance or emergencies 33.825 It huDwA81-E 5.50; (unifless) 94SED OFF OF MAIN PIOND t MAX F,g, VOL. 35,7&ft2 OK A 22,3301 ft2 14,012jft2 — 73,2801ft' OK 155,7381ft3 BASED OFF OF IYIAIN POND i MA%� F 8 • VO4 �'di�(/%) 219%% OK ADDITIONAL FS. VOL 115TIOLS 32.3% - - V901% Y ;(Y or N) N I(Y or N) 5.50 (unitless) or N) 155,738',ft' OK 35,7231 ftz OK 4,35'Ift OK 4.4';ft OK N I(Y or N) � jft2 jft2 �ftz Ift ft ift �pQ���f d,/EYGS C-gE7 W BASER OFF OF MAIN FOND, } MAXA�VO 64 VpCRA1 _ MOL _ AcIUAL = M,165 of ApdVM_pOOL.ACNgL° mz,61(03f AVIIII 06PrH_AC"LV y.Z-Ct Y (Y or N) 4.00 in in 0.60, limitless) 0.44: ft N (Y or N) (unitless) ,(unitless) R R / 6.901 ft'Isec a Insufficient pre -development peak flow. 'ft'Isec 0.2811ft'Isec 2.10. days OK, draws down in 2-5 days. (SCS ROJ'DNC4 IN HYDRAFLOW MODEL) Foa PEAK• SJirrtlFo1,r"AIDi IkL. Drawdown time varying from expected value by more than a half day. 3:1 OK 10 :1 OK 10.0'It OK 3 :1 OK 3.3':1 OK ' Y .(Y or N) OK 1.21ft OK N '(Y or N) OK Y 1(Y or N) OK Y I(Y or N) OK ._ ;Slormwaler Pumps. Form SW401-Wet Detention Basin-Rev.5 Parts I. & 11. Design Summary, Page 2 of 2 F`g 0 b 2009 Permit No.SW (robe provided by DVVQ) 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. JRL s w-o I 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. ERG 5 W-Oz 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. .1Rc. SW-oZ 3. Section view of the wet detention basin (1" = 20' or larger) shoving: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. -Nor APFtIcABLE — 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. JRC 0#4izs 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay, to verify volume provided. d 2c sw-01 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. J2C. eALcs. 7. The supporting calculations. JRC O 1 rn 8. A copy of the signed and notarized operation and maintenance (08M) agreement. .3KC- DR 9. A copy of the deed restrictions (if required). JKG- SR 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.5 Part III. Required Items Checklist, Page 1 of 1 HIGH DENSITY DEVELOPMENTS WITH OUTPARCELS FEB 0 5 2009 DEED RESTRICTIONS & PROTECTIVE COVENANCES tw$Ugt-�)l1 0 In accordance with Title 15 NCAC 21-1.1000, the Stormwater Management Regulations, deed restrictions and protective covenants are required for High Density Developments with Outparcels where outparcel lots will be subdivided from the main tract and sold. Deed restrictions and protective covenants are necessary to ensure that the development maintains a "built -upon" area consistent with the design criteria used to size the stormwater control facility. I, Kermit E. Austin, Jr. , acknowledge, affirm and agree by my signature below that I will cause the following deed restrictions and covenants to be recorded prior to the sale of any outparcel or future development area within the project known as K. E. Austin Corporation 1. The following covenants are intended to ensure ongoing compliance with State Stormwater Management permit Number -fµl$ 0%1� 16 ,, as issued by the Division of Water Quality under NCAC 211.1000. 2. The Slate of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the stormwater management permit. 3. These covenants are to run with the land and be binding on all persons and parties claiming under them. a. 77te covenants pertaining to stormwater mail not be altered or rescinded without the express written consent of the Slate of North Carolina. Division of Water Quality. 5. Alteration of the drainage as shown on the approved plan may not take place without the concurrence of the Division of Water Quality. 6. The urarinnm allowable built -upon area for the outparcel(s) shown on the approved plans, in square feel, is as follows: lots Impervious Allocation Lot impervious Allocation 1 — 5 1 69,700 sq. ft. 6-7 34,850 sq. ft. These allotted amounts include any built -upon area constructed within the lot property boundaries, and that portion of the right-of-way between the front lot line and the edge of the pavenhent. Built upon area includes, but is not limited to, .structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface afswimming pools. 7. The runoff front all built upon area within the outparcel or fitture development area must be directed into the permitted stortmwater control system. 8. Buill-upon area in excess of the permitted amount will require a permit modification. 9. The connection from the outpurcel's collection system into the .stormwater control shall be made such that short-circuiting of the s'w1ent does not occur. 10. For those outparcels or f uture development areas whose ownership is not retained by the permiaee, the new owner ,shall submit a separate offsite stormwater permit application to the Division of Water Quality and receive a permit prior to construction. Signature: �}�QX.,�L` Date: Z 0 / /1 1 ` I, /ill AJ ,ka— S , Coal a Notary Public in the State of 1 e Co,re'k%'v P. County of Ae%4 L4/}N0 V-e r do hereby certify that 1(-eYM tt G. AAayt N Sr • personally appeared before me this the 3 rd day of Feby 16.1116 A M 200, and acknowledge the due execution of the foregoing instrument. Witness my hand and official seal, -C�� •� - q� Signature My Commission expires t ZO 4R4x\Q$;S 4$. SEAL =Z ro NOTARY y PUBLIC ER GOJ�eev