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HomeMy WebLinkAboutSW8090509_CURRENT PERMIT_20220202STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 O q 050 DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2022 0202 YYYYMMDD ROY COOPER Governor ELIZABETH S. BISER Secretary BRIAN WRENN Director February 2, 2022 Coastal Landmark Properties, LLC Attn: Erik Kenyon, Managing Member 621 Wedgewood Road Whiteville, NC 28472 NORTH CAROLINA Environmental Quaary Subject: Permit Renewal Post -Construction Stormwater Management Permit No. SW8 090509 Coastal Carolina ENT, PA Brunswick County Dear Mr. Kenyon: Effective August 1, 2013 the Post -Construction Stormwater Management Program has been transferred from the Division of Water Quality ("DWQ") to the Division of Energy, Mineral and Land Resources ("DEMLR"). All previous references to DWQ will remain in older permits issued prior to August 1, 2013 until they are modified. Please note that this permit will now reference DEMLR as the Division responsible for enforcement of the permit. On August 5, 2009, the Governor signed Session Law 2009-406. This law impacted any development approval issued by the former Division of Water Quality under Article 21 of Chapter 143 of the General Statutes, which was current and valid at any point between January 1, 2008, and December 31, 2010. The law extended the effective period of any permit that was set to expire during this time frame to three (3) years from its current expiration date. On August 2, 2010, the Governor signed Session Law 2010-177, which granted an extra year for a total of four (4) years extension. The Division of Energy, Mineral and Land Resources received a complete 8-year Permit Renewal Application for the subject permit on January 31, 2022. The Division is hereby notifying you that permit S W8090509 has been renewed, updated, and re -issued on February 2, 2022, as attached. As requested, a copy of the current operation and maintenance agreement is also enclosed. Please be aware that the renewal and re -issuance of this stormwater permit does not imply that the site is currently in compliance. This permit shall be effective until December 30, 2029, which includes all available extensions, and does not supersede any other agency permit that may be required. The project shall be subject to the conditions and limitations as specified therein. Tbis permit does not impose new or increased stormwater control requirements; it clarifies the rules and requirements of this program to provide you with a better understanding of your obligations under this permit. Failure to comply with these requirements will result in future compliance problems. Please note that this permit is not transferable except after notice to and approval by the Division. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes and must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www NCOAH.com. Unless such demands are made this permit shall be final and binding. If you have any questions concerning this permit, please contact Ashley Smith in the Wilmington Regional Office, at (910) 796-7215 or ashleym.smith@ncdenr.gov. Sincerely, ''��qq� ,97. Brian Wrenn, Director Division of Energy, Mineral and Land Resources - I D ffln North Carolina Department of Environmental Quality I Dhasion of Energy, ATineral and land Resources �/ Wilmington Regional Office 1127CardmalDnve Extension I wihmngton. North Carolina 28405 State Stormwater Permit No SW8 090509 Page 2 of 2 Enclosures: Attachment C — Permitting History Renewal Application Documents Copy of the current operation and maintenance agreement DES/ams: \\\Stormwater\Permns & Projects\2009 090509\ HD\2022 02 permit 090509 cc Wilmington Regional Office Stormwater File D E Q North Carolina Department of Environmental Quality I Division of Energy, lrrmerai and land Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wllmmgton. North Carolina 28405 �� 9107%7215 Post -Construction Stormwater Management Permit No SW8 090509 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES POST -CONSTRUCTION STORMWATER MANAGEMENT PERMIT HIGH DENSITY COMMERCIAL 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 Coastal Landmark Properties, LLC Coastal Carolina ENT, P.A. 2298 Ocean Hwy, Shallotte, 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') and as outlined in the application, approved stormwater management plans, supplement, calculations, operation and maintenance agreement, recorded documents, specifications, and other supporting data (the "approved plans and specifications") as attached and/or on file with and approved by the Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR") The project shall be constructed, operated and maintained in accordance with these approved plans and specifications The approved plans and specifications are incorporated by reference and are enforceable part of this permit This permit shall be effective from the date of issuance until December 30, 2029 and shall be subject to the following specified conditions and limitations The permit issued shall continue in force and effect until the permittee files a request with the Division for a permit modification, transfer, renewal, or rescission, however, these actions do not stay any condition 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 for cause as allowed by the laws, rules, and regulations contained in Title 15A NCAC 2H 1000 and NCGS 143-215 1 et al I. DESIGN STANDARDS 1 This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data 2 This stormwater system has been approved for the management of stormwater runoff as described in Section 1 7 on page 2 of this permit The stormwater control has been designed to handle the runoff from 35,700 square feet of impervious area 3 A 50' wide vegetative buffer must be provided adjacent impounded structures, streams, rivers and tidal waters 4 The tract will be limited to the amount of built -upon area indicated on page 2 of this permit, and per approved plans Page 1 of 5 Post -Construction Stormwater Management Permit No SWB 090509 5 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 6 The runoff from all built -upon area within the permitted drainage area(s) of this project must be directed into the permitted stormwater control system 7 The following design criteria have been provided in the wet detention pond and must be maintained at design condition a Drainage Area, acres Onsite, ftZ Offsite, ft2 b Total Impervious Surfaces, ft' Buildings, ft2 Parking, ftz Sidewalks, ft2 c Design Storm, inches d Average Pond Design Depth, feet e TSS removal efficiency f Permanent Pool Elevation, FMSL g Permanent Pool Surface Area, ft2 h Permitted Storage Volume, ft3 i Temporary Storage Elevation, FMSL I Pre-dev 1 yr-24 hr discharge rate, cis k Controlling Orifice I Orifice flowrate, cfs m Permitted Forebay Volume, ft3 n Fountain Horsepower o Receiving Stream/River Basin p Stream Index Number q Classification of Water Body II. SCHEDULE OF COMPLIANCE 15 65,421 0 35,700 9,315 24.968 1,489 15 35 90% 400 3,910 4,414 at temporary pool elev 4092 1 56 VO pipe 0 014 1,454 N/A UT Williams Branch / Lumber 15-25-2-9-3 "C, Sw, HQW" 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 time provide the operation and maintenance necessary to assure the permitted stormwater system functions at the design condition 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 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 q 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 DEMLR The records will indicate the date, activity, name of person performing the work and what actions were taken Page 2 of 5 Post -Construction Stormwater Management Permit No SW8 090509 The facilities shall be constructed, operated and maintained in accordance with the provisions of this permit, the approved plans and specifications, and the supporting documents attached to this permit and on file with the Division 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 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 Access to the stormwater facilities for inspection and maintenance shall be maintained via appropriate recorded easements at all times 9 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 10 No person or entity, including the permittee, shall alter any component shown in the approved plans and specifications Prior to the construction of any modification to the approved plans, the permittee shall submit to the Director, and shall have received approval for modified plans, specifications, and calculations including, but not limited to, those listed below For changes to the protect or SCM that impact the certifications, a new or updated certification(s), as applicable, will be required and a copy must be submitted to the appropriate DEQ regional office upon completion of the modification a Any modification to the approved plans and specifications, regardless of size including the SCM(s), BUA, details, etc b Redesign or addition to the approved amount of BUA or to the drainage area. c Further development, subdivision, acquisition, lease or sale of any, all or part of the protect and/or property area as reported in the approved plans and specifications d Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any component of the approved SCM(s), the stormwater collection system and/or vegetative conveyance shown on the approved plan e The construction of any allocated future BUA f The construction of any permeable pavement, #57 stone area, public trails, or landscaping material to be considered a permeable surface that were not included in the approved plans and specifications g Other modifications as determined by the Director III. GENERAL CONDITIONS CORRECTIVE ACTIONS REQUIRED If the facilities fail to perform satisfactorily, the permittee shall take immediate corrective actions This includes actions required by this Division and the stormwater rules such as the construction of additional or replacement on -site stormwater systems These additional or replacement measures shall receive a permit from the Division prior to construction PERMIT RENEWAL A permit renewal request must be submitted at least 180 days prior to the expiration date of this permit The renewal request must include the appropriate application, documentation and the processing fee as outlined in Title 15A NCAC 02H 1045(3) CHANGES TO THE PROJECT NAME, PERMITTEE NAME OR CONTACT INFORMATION The permittee shall submit a completed Permit Information Update Application Form to the Division within 30 days to making any one of these changes Page 3 of 5 Post -Construction Stormwater Management Permit No SW8 090509 4 TRANSFER This permit is not transferable to any person or entity except after notice to and approval by the Director Neither the sale of the project and/or property, in whole or in part, nor the conveyance of common area to a third party constitutes an approved transfer of the permit a TRANSFER REQUEST The transfer request must include the appropriate application, documentation and the processing fee as outlined in 15A NCAC 02H 1045(2) This request must be submitted within 90 days of the permit holder meeting one or more of the following i A natural person who is deceased, n A partnership, limited liability corporation, corporation, or any other business association that has been dissolved, ui A person or entity who has been lawfully and finally divested of title to the property on which the permitted activity is occurring or will occur through foreclosure, bankruptcy, or other legal proceeding IV A person or entity who has sold the property, in whole or in part, on which the permitted activity is occurring or will occur b TRANSFER INSPECTION Prior to transfer of the permit, a file review and site inspection will be conducted by Division personnel to ensure the permit conditions have been met and that the project and the on -site stormwater system complies with the permit conditions Records of maintenance activities performed to date may be requested Projects not in compliance with the permit will not be transferred until all permit and/or general statute conditions are met 5 COMPLIANCE The permittee is responsible for compliance with the terms and conditions of this permit until the Division approves the transfer request a APPROVED PLANS AND SPECIFICATIONS A copy of this permit, approved plans, application, supplement, operation and maintenance agreement, all applicable recorded documents, and specifications shall be maintained on file by the permittee at all times b DIVISION ACCESS The permittee grants Division Staff permission to enter the property during normal business hours to inspect all components of the permitted project c ENFORCEMENT Any individual or entity found to be in noncompliance with the provisions of a stormwater management permit or the requirements of the stormwater rules is subject to enforcement procedures as set forth in NCGS 143 Article 21 d ANNUAL CERTIFICATION The permittee shall electronically submit to the Division an annual certification completed by either the permittee or their designee confirming the protects conformance with permit conditions e OBTAINING COMPLIANCE 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 modified plans and certification in writing to the Director that the changes have been made f OTHER PERMITS The issuance of this permit does not preclude the permittee from complying with and obtaining any other permits or approvals that are required for this development to take place, as required by any statutes, rules, regulations, or ordinances, which may be imposed by any other Local, State or Federal government agency having jurisdiction Any activities undertaken at this site that cause a water quality violation or undertaken prior to receipt of the necessary permits or approvals to do so are considered violations of NCGS 143-215 1, and subject to enforcement procedures pursuant to NCGS 143-215 6 Page 4 of 5 Post -Construction Stormwater Management Permit No SW8 090509 Permit renewed, updated and reissued this the 2ndd day of February 2022 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION U'W.lY . I !`f cJU Brian Wrenn, Director Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Page 5of5 Attachment C - Permitting History Coastal Carolina ENT, PA Permit No SW8 090509 Approval Date Permit Action BIMS Version Description of the Changes 7/27/2009 Original Approval 10 2/2/2022 Renewal 20 Expires December 30, 2029 RECEavZ-13 MAY 0 7 p yt Detention Permit Number. 5wg 0�10-�Og (to be provided by DWQ) Drainage Area Number. Basin Operation and Maintenance Agreement BY: U� M I 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. N Th'6'/system (check one): [does ❑ does not incorporate pretreatment other than a forebay. rz Q Important maintenance procedures: y — 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 dram 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 1 will remediate theproblem: The entire BMP Trash/debris is present Remove the trash/debris The perimeter of the wet Areas of bare sod 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 SW40I-Wet Detention Basin O&M -Rev 4 Page 1 of 4 Permit Number. s' s 090S63 (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 Permit Numhei 5W!s 090509 (to be pt orttle(l /7Y D1 F0) Dimnugc Aica Numbci / BMP element: Potential problem: Ilovv I will remedtale theproblem: 'rheembankment Silt ubshave titaitedtogiow Itenluveshiobsimmeclmlely on tile. embankment Evidence of nuiskrat of Use tiaps to tenlove nnisktats and beavei activity is present consult a piutessional to tenlove beavers A Lice has star Icd to grow nn Consult a dam safety specialist to the embankment remove the tree. An annual inspection by an Make all needed iepaus appiopnate professional shows that the embankment needs iepan (if applicable) The outlet device Clogging has occur red Clean out the outlet device. Dlspose of the sediment off -site The outlet device is damn aed Repau or re glace the outlet device The receiving water Eiosion of other signs of damage have occurred at the outlet Contact the local NC Division of Water Quality Regional Office, or the 401 Ovetsight Unit at 919-733- 1756 The measuring device used to determine the sediment elevation shall be such that it will give in accurate depth reading and not readily penetrate into accunnilated sediments When the permanent pool depth reads sediment shall be removed. When the permanent pool depth leads shall be removed S feet In the main pond, the 3 feet in the forebay, the sediment 13ASIN DIAGRAM (fill in the blemk.) sedunent Removall: 30 -----��- ------ P11111"It"I'le il 3ottum Llevauoi Sediment Stomec FOREBAY Permanent Poul 1, evanon I'uul J Sediment Removal Elevation Volume \------------ Ruuom Elevation 3Y,0 I 1-n n it Sediment storage MAIN POND Fz qCmA % mn JUL 2 1 2009 Conn SW401-Wet Detention Page 3 ol'rl Permit Number Sw& 10509 (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:Dr. Erik Kenyon Coastal Carolina ENT, P.A. BMP drainage area number Print name. C l Title: V p (e A t'J'e P"_ Address:850 Sunset Blvd N LA 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, �f)/1rA. : a Notary Public for the State of n(—Cl l�iC1`1C13County of1'LaY�51 t� LCIL , do hereby certify that knk ion personally appeared before me thisa4 day of)�ZrL,h , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements Witness my hand and official seal, =` - a f^l s� S&f L"' My commission expires��/ Form SW40I-Wet Detention Basin O&M -Rev 4 Page 4 of 4 DEMLR USE ONLY R ceived Fee Paid Permit Number ane 'al -lATH 1,2 IA Ec n (tit C' U OJ NC DEQ Division of Energy, Mineral and Land Resources In accordance with , the current permit holder shall renew their high density permit 180 days poor to its expiration Renewed permits are valid for a period of 8 years per Session Law 2011-398 (S8, 781) Section 60 (c) This application form is for permit renewals only 1. State Stormwater Permit Nuntper. �> W On U D U` 2. Project name: li- VO C r, n k k VX- c— NT 3. Project street address. 1 Q ( ��r �J L{ , City: 0 �� i County/^JnjJ tCCZIP:J�Z� l �� 4. What, if any, changes have been made to the project as permitted? No r-'z- If the project has changed from the original approved plans, please complete SWU-101 for a Major Modification or Minor Modification Application form available at. If changes to the permittee or project name have been made, please complete either the Permit Update form or the Permit Transfer form available at • I , , automatically transfer with the sale of the property State Stormwater Permits do not 1 1. Current Permit Holder's Company Name/Organization: /Organization: cooC, slo I � fao t F1/ P( - o fir ilk S 2. Signing Official's Name � KY- I e r�\. I 0 3. Signing Official's Title- a 6- K 4. Mailing Address. j�t)p 4 A c)Lir� Qcr. City: W, , , t ev, `'i CI State- N_ ZIP :)n 5 Street Address: S C`Yh2 C—s C,- wC City: State. ZIP. ( I 6 Phone. ) �3 —� Z) � Email- C rr1 K- eny� � uci . Cc, Stonnwwater Permit Renewal Foini Paoe 1 of 3 LL L .4 ,,;, . . CEOVE DEC 2 g ?r='- i WL JAN 3 1 2022 Mav 11 2018 Submit the application package to the appropriate (Coastal, SA Waters) or DEMLR Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW). Only applications packages that include all required items listed below will be accepted and reviewed. Initial each item below to Indicate that the required information is provided In the application package: 1 1 L 1. A permit application processing fee of $505.00 payable to NCDEQ. 2. One original signed hard copy and one electronic copy of this completed form The signing official named on this application to represent the current permittee must meet one of the following* a. Corporation — a principle executive officer of at least the level of vice-president b. Limited Liability Company (LLC) — a manager or company official as those terms are defined in G.S. 57D "North Carolina Limited Liability Company Act;' c. Public Entity — a principal executive officer, ranking official, or other duty authorized employee, d. Partnership or limited partnership — the general partner, e Sole proprietor; or f Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity. 3. One hard copy and one electronic copy of recorded documents required by the original permit that have not yet been received by DEMLR, including: deed restrictions, protective covenants, condominium/planned community declaration and easements. If the project has been built, include documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If the project has not been built, include a signed agreement that the final recorded deed restrictions and protective covenants will be submitted at a later date. 4 O&M Agreements, Please select one ❑ 1 have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to keep this on file with the permit; or I do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a copy be sent to me. I agree to keep this on file with the permit 5 Designer Certifications, Please select one: ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans have been previously provided to the Division; or ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans are enclosed; or ❑ The project has not yet been built 6 [IF APPLICABLE) If the project has been built, one original hard copy and one electronic copy of a signed, sealed, and dated letter from a licensed professional stating that the SCMs have been inspected, and that they have been built and maintained in accordance with the permit. 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide one hard copy and one electronic copy of documentation from the NC Secretary of State, or other official documentation, which supports the titles and positions held by the persons listed in Section C.2 per 15A NCAC 2H. 1043(3)(b) ECEQVE YI_ _ Stormwater Permd Renewal Application Form Page 2 of 3 Mav 11. 2018 O� PERNOTTEE�'SS CER—IF1 'ATION I !IV t fie hyd� the person legally responsible for the permit, certify that I have a copy c the Permit and 09M Agreement on site (or I will obtain a copy and it will be kept on site), that I am responsible for the performance of the maintenance procedures, and the site has been and will be maintained according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs or built -upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the project, SCMs, or owner All formation provided on this permit renewal application is, to the b st of my knowledge, correct rfd co p t Signature Date �( a NOTARIZATION n '� I, 64eri ne E . l [�5 a Notary Public for the State of /Jo✓ol Nyol ioa County of Baden do hereby certify that t✓ on personally appeared before me this day of -,DeCem her , 20 a-1 , and acknowledge the due 1.4*i tfon of6j rgoing instrument. Witness my hand and official seal, eNotarY Public "FN "eA (Notes dpeSQ MY Comm 1:xp _ ,Z� 12-16-2022 �Q'\ My commission expires la-/w-�a�oZ DEC 2 8 2021 Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 Permit No Sws' "105,05 (to be provided by DWO) �ya� OQuid Y W A TEG RA NCDENR '" STORMWATER MANAGEMENT PERMIT APPLICATION FORM Y 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted The Required Items Checklist (Part ill) must be printed, filled out and submitted along with all of the required information Project name Ur Kenyon s Doctor Umce Contact person Tim Clinkscales, PE Phone number 910-791-6707 Date 4115/2009 Drainage area number 1 II. DESIGN INFORMATION Site Characteristics Drainage area 65,421'It2 Impervious area, post -development 35,7001 f1 % impervious 5457 % Design rainfall depth 15 in Storage Volume, Non -SA Waters Minimum volume required 4,414 to Insufficient required volume Volume provided 4,4141 fts OK, volume provided is equal to or in excess of volume required Storage Volume. SA Waters 1 5' runoff volume NIA Its Pre -development 1-yr, 24-hr runoff ;to Post -development 1-yr, 24-hr runoff , ft' Minimum volume required NIA fl' Volume provided 'tts Peak Flow Calculations Is the pre/post control of the 1yr 24hr storm peak flow roqulredo - - IN -' '(Y or N) 1-yr, 24-hr rainfall depth 3 T in Rational C, pmdevelopment 69 00 (umttess) Rational C, post -development 80 00 (unifless) Rainfall intensity 1-yr, 24-hrstorm 652; infhr OK Pre -development 1-yr, 24-hr peak flow 156 fl'Isec Post -development 1-yr, 24-hr peak flow 304 ft'Isec Pre/Post 1-yr, 24-hr peak flow control 148 kslsec Elevations Temporary pool elevation 4092 fmsl Permanent pool elevation T�i -'ra�am �� 1r-� 4000 fmsl RE ibV+ 1) SHWT elevation (approx at the pen pool elevation) 3950 fmsl Top of loft vegetated shelf elevation 4050 fmsl JUL 2 1 2009 Bottom of 10tt vegetated shelf elevation 3950 tmsl Sediment cleanout, top elevation (bottom of pond) �,0 348&dmsl S(s P Sediment cleanout, bottom elevation 3y,0.13ee finial BY; Sediment storage provided 1.00 It Is there additional volume stored above the state -required temp pool? Y (Y or N) Elevation of the lop of the additional volume 409 fmsl OK Fonn SW401-Wet Detention Basin -Rev 6-2120/09 Parts I a 11 Design Summary, Page 1 of 2 Permt Noswe 0900 r7 ((o be pmvMed by DWQ) II DESIGN INFORMATION Surface Areas Area, temporary pool 5,392 112 Area REQUIRED, permanent pool 3,559 ft' SAIDA ratio 544 limitless) Area PROVIDED, permanent pool, A._,, 3,910 ft` OK Area, bottom of 1 Oft vegetated shelf, Aw um 1,888 ft` Area, sediment cleanout, top elevation (bottom of pond), A,,,,, 270 ft` Volumes Volume, temporary pool 4,414 ft3 OK Volume, permanent pool, Vp, . 7,867 ft3 Volume, forebay (sum of forebays if more than one forebay) 1,454 ft' Forebay %of permanent pool volume 18 5 % % OK SAIDA Table Data Design TSS removal 90, % Coastal SAIDA Table Used? Y '(Y or N) MountairdPiedmont SAIDA Table Used? N : (Y or N) SAIDA ratio 544 (umtless) Average depth (used in SAIDA table) Calculation option 1 used? (See Figure 10-21h) N - (Y or N) Volume, permanent pool, Vp,,,_ ft' Area provided, permanent pool, Ap,,,yoy it, Average depth calculated ;ft Average depth used in SAIDA, d,,, (Round to nearest 0 5ft) ;ft Calculation opbon 2 used? (See Figure 10-21b) Y (Y or N) Area provided, permanent pool, Ap,,,,_,d - 3,910;fl OK Area, bottom of 10ft vegetated shelf, Aya �,, 1,888i ft` OK Area, sediment cleanout, lop elevation (bottom of pond), Awy , 270;fh OK 'Depth' (distance b/w bottom of 1Oft shelf and top of sediment) 5 Wft OK Average depth calculated 3 51'ft OK Average depth used in SAIDA, d,,, (Round to nearest 0 5ft) - 3 51 ft OK Drawdown Calculations Omwdown through onfice? _ Y _ _ I(Y or N) Diameter of onfice (if circular) 100 in Area of onfice (if-non-cncular) _ !in' Coefficient of discharge (CD) 0 60 (umtless) Driving head(H.) ( 031'ft Dawdown through weir? N '(Y or N) Weir type - limitless) Coefficient of discharge (C,) (unitless) Length of weir (L) ft Driving head (H),ft Pre -development 1-yr, 24-hr peak flow 1 56,ft31sec Insufficient pre -development peak flow Post -development l-yr, 24-hr peak flow 3041 fts/sec OK Storage volume discharge rate (through discharge onfice or weir) 046'ft3/sec Storage volume drawdown time 352 days OK, draws down in 2-5 days OK, drawdown time is coned Additional Information Vegetated side slopes 3 1 OK Vegetated shelf slope 10 1 OK Vegetated shelf width 100ft OK Length of towpath to width ratio -6.- 1 OK S(rt P Length to width ratio j -Pi 1 OK Trash rack for overflow & onfice? Y (Y or N) OK Freeboard provided 10 It OK Vegetated filter provided? N I (Y or N) OK Recorded drainage easement provided? Y (Y or N) OK Capums all runoff at ultimate build -out? Y (Y or N) OK Dram mechanism for maintenance or emergencies _ Far maintenance efforts, water stored below the permanent pool, shall be pumped Form SW401-Wet Detention Basin -Rev 6-220M Parts I & 11 Design Summary, Page 2 of 2 State Stormwater Management Systems Permit No SW8 090509 Dr Erik Kenyon Coastal Carolina ENT, P A. Stormwater Permit No SW8 090509 Brunswick County Designer's Certification Ci'r�ksf as a duly registered in the State of North Carolina, having been authouzed to observe periodical / weekly/ full time) the construction of the project, (Project) f for D. t z, k «+ — (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 Szu/o A)6 O09, O�f7 =OQ�NESS �0�'' L �'S'y �Y�rNEEp:SGQ�s G. C L INS.,,.. Pan,- R of 7 State Stonnwater Management aystems Permit No SW8 090509 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 structure elevations are per the approved plan The outlet structure is located per the approved plans. 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. The required system dimensions are provided per the approved plans 16. All components of the stormwater BMP are located in either recorded cornmon areas, or recorded easements cc NCDENR-DWO Regional Office Brunswick County Building Inspections Paqe 7 of 7