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HomeMy WebLinkAboutSW8021017_Current Permit_20200917ROY COOPER Governor MICHAEL S. REGAN Secretary BRIAN WRENN Director September 17th, 2020 NORTH CAROLINA Environmental Quality University of North Carolina - Wilmington Attn: Vice Chancellor for Business Affairs c/o Mark Morgan, Associate Vice Chancellor for Business Affairs -Facilities 601 S. College Rd. Wilmington, NC 28403 Subject: Approved Minor Modification Stormwater Permit No. SW8 021017 UNCW P3 Freshman Housing, the Hub, & Dining Hall New Hanover County Dear Mr. Morgan: On September 1 Ith, 2020, the Wilmington Regional Office of the Division of Energy, Mineral and Land Resources received and accepted a complete minor modification application for changes to the approved plans for Stormwater Management Permit Number SW8 021017. It has been determined that the nature of the proposed change meets the definition of a minor modification in that it does not result in an increase in the size of the permitted stormwater control measure (SCM) and does not increase the amount of built -upon area. Please refer to Attachment C for a detailed description of the current proposed minor modification and a list of all the past modifications approved during the effective period of the permit. We are forwarding you an approved copy of the modified plans for your files. Please add the attached plans to the previously approved plan set. Please replace the previously issued permit with the revised permit, dated September 171, 2020, attached. This revised permit does not impose new or different terms; it merely restates and clarifies some of the previous terms to provide you with a better understanding of your obligations under the permit. Please be aware that all terms and conditions of the permit issued on April 411, 2019 and modified as attached, remain in full force and effect. Please also understand that the approval of this minor modification to the subject State Stormwater Permit is done on a case -by -case basis. Any other changes to this project must be approved through this Office prior to construction. The approval of this minor modification does not preclude the permittee from complying with all other applicable statutes, rules, regulations or ordinances which may have jurisdiction over the proposed activity, and obtaining a permit or approval prior to construction. If you have any questions concerning this matter, please contact Kellie Beth Norris in the Wilmington Regional Office at (910) 796-7215 or kellie.norris@ncdenr.gov. Sincerely, '')i . f''. Brian Wrenn, Director Division of Energy, Mineral and Land Resources Enclosures: Attachment A — Designer's Certification Form Attachment C — Permitting History Application Documents DES\kbn: %Stormwater\Permits & Projects\2002\021017 HD\2020 09 permit —minor 021017 cc: Daniel Wiebke, PE, McAdams New Hanover County Building Safety Department. Wilmington Regional Office Stormwater File ME North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405 NORTH rAROUNA n.p "-.t f .eim.w 910.796.7215 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In compliance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations promulgated and adopted by the North Carolina Environmental Management Commission, including 15A NCAC 02H.1000 as amended by Session Law (SL) 2008-211, and subsequently amended on January 1, 2017 (2017 Rules) (collectively, the "stormwater rules"), PERMISSION IS HEREBY GRANTED TO UNC WImington P3 Freshman Housing, the Hub and Dining Hall Riegel Road, Wilmington, New Hanover County FOR THE construction, management, operation and maintenance of built -upon area (BUA) including one (1) area of redevelopment as well as one (1) wet pond and one (1) area of permeable pavement ("stormwater control measures" or "SCMs") 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 February 10, 2024 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. REDEVELOPMENT. The redevelopment portion of this project is exempt from State Stormwater permitting requirements under the following conditions: 1) The project must be constructed as shown on the plans submitted to this Office; 2) the proposed redeveloped BUA of 31,648 square feet does not exceed the existing BUA of 38,009 square feet; and 3) The proposed stormwater control sheet flow and a piped collection system provides equal protection of surface waters as the existing stormwater control sheet flow and a piped collection system. 2. BUA REQUIREMENTS. The maximum amount of BUA allowed for the entire project is 638,294 square feet. The runoff from all BUA within the permitted drainage areas of this project must continue to be directed into the permitted SCMs. The following specific requirements pertain to the BUA on this project: a. SCM BUA LIMITS. The SCMs labeled Pond 1 and Permeable Pavement 1 have been designed using the runoff treatment method to handle the runoff from 596,022 and 65,705 and (for PP1) 17,012 square feet of BUA, respectively within the delineated drainage areas. The BUA for future development within Pond 1 is limited to a total of 126,897 square feet, which includes 2,602 square feet allocated to the P3 project and 124,295 square feet allocated to the future recreation area. This permit does not provide any allocation of BUA for future development within the delineated drainage area for Permeable Pavement 1. 3. SCM REQUIREMENTS. The following requirements pertain to the SCMs on this project: a. WET POND SCM DESIGN. The wet pond SCM is permitted under the 2017 MDC and is based on the design criteria presented in the sealed, signed and dated supplement and as shown in the approved plans and specifications. This SCM must be provided and maintained at the design condition. b. PERMEABLE PAVEMENT SCM DESIGN. The permeable pavement has been designed under SL 2008-211 to handle the design rainfall depth and will bypass the 10-year, 24-hour storm event through the provided outlets. The following design criteria have been permitted for the permeable pavement and it must be provided and maintained at the design condition: Area 1 a. Type of Permeable Pavement (PP): PICP b. PP design type: Bypass c. Hydrologic soil group of subgrade: A d. Grass Managed Credit: 75% e. Total Impervious Area Before PP Credit, ft2: Total PP Surface Area, ft2: Treated as Pervious (75%), ft2: Treated as Impervious for density calculations (259,6), ft2: Adjacent Impervious Area directed to PP, ft2: 17,012 8,518 6,388 2,130 8,494 f. Total Impervious Area After PP Credit, ft2: 10,624 g. Design Storm, inches: 1.5 h. PP top of aggregate base layer elevation, FMSL: varies i. Bypass / Overflow elevation, FMSL: 42.48 j. PP bottom elevation at the Subgrade, FMSL: 41.85 k. Provided aggregate depth, inches: 7.5 I. SHWT elevation, FMSL: 39.75 m. Underdrain Diameter, inches: 6.0 n. Expected Infiltration Rate, in/hr: 8.32 o. Time to Drawdown, days: 0.02 p. Receiving Stream / River Basin: Burnt Mill Creek / Cape Fear q. Stream Index Number: 1874-63-2 r. Classification of Water Body: C, SW c. PLANTING PLAN. The wet pond SCM landscape planting plan shown in the approved plans shall be followed in its entirety during construction. After the plants are established, the operation and maintenance agreement must be followed. d. FOUNTAINS. At this time, a decorative spray fountain has not been proposed within the wet pond. Decorative spray fountains will be allowed in the wet pond if documentation is provided demonstrating that the proposed fountain will not cause resuspension of sediment within the pond or cause erosion of the pond side slopes. e. IRRIGATION. If the wet pond is to be used for irrigation, it is recommended that some water be maintained in the permanent pool, the vegetated shelf is planted with appropriate species that can handle fluctuating conditions, and human health issues are addressed. f. PERMEABLE PAVEMENT. The following considerations pertain to the infiltrating permeable pavement: i. The permeable pavement must be installed by a qualified individual, certified in the specific construction techniques required for permeable pavements. ii. During the installation of the permeable pavement, special care must be taken to avoid compaction of the underlying subgrade soils. A direct measurement of the soil's infiltration rate must be taken immediately after excavation and 'before the aggregate is placed. Infiltration rate testing shall be conducted by an appropriately - qualified professional. The results of the testing shall be given to the designer of record for review. If the soil test shows that infiltration rate(s) that are lower than the rate(s) used in the final design, then the designer shall check the calculations and may need to adjust the design. iii. The permeable pavement must be protected during site construction such that no sediment -laden runoff is directed across the permeable pavement surface. Areas upslope of the permeable pavement must be stabilized with a substantial stand of permanent grass cover prior to construction of the permeable pavement. iv. The proposed stormwater runoff conveyance and collection system and the impervious areas must be constructed and maintained at the dimensions, elevations and grades as shown on the approved plans. V. For each section or terrace of permeable pavement, at least one observation well shall be provided. vi. Permeable Pavement signage must be clearly and permanently posted to prevent use by inappropriate vehicles as well as the deposition and storage of particulate matter. vii. Trees overhanging the permeable pavement should be avoided. viii. Concentrations of oils, grease, heavy metals, and toxic chemicals shall not be stored or handled where they may enter the permeable pavement. ix. At no time shall the approved permeable pavement be paved over or repaired with any type of conventional paving material. 4. STORMWATER OUTLETS. The peak flow from the 10-year storm event shall not cause erosion downslope of the discharge point. 5. VEGETATED SETBACKS. A 50-foot wide vegetative buffer/setback must be provided and maintained in grass or other vegetation adjacent to all surface waters as shown on the approved plans. The setback is measured horizontally from the normal pool elevation of impounded structures, from the top of bank of each side of streams or rivers, and from the mean high waterline of tidal waters, perpendicular to the shoreline. a. BUA IN THE VEGETATED SETBACK. BUA may not be added to the vegetated setback except as shown on the approved plans. b. RELEASE OF STORMWATER NOT TREATED IN AN SCM. Stormwater that is not treated in an SCM must be released at the edge of the vegetated setback and allowed to flow through the setback as dispersed flow. 6. RECORDED DOCUMENT REQUIREMENTS. The stormwater rules require the following documents to be recorded with the Office of the Register of Deeds: a. ACCESS AND/OR EASEMENTS. The entire stormwater conveyance system, including any SCMs, and maintenance accesses must be located in public rights -of -way, dedicated common areas that extend to the nearest public right-of-way, and/or permanent recorded easements that extend to the nearest public right-of-way for the purpose of inspection, operation, maintenance, and repair. b. OPERATION AND MAINTENANCE AGREEMENT. The operation and maintenance agreement must be recorded with the Office of the Register of Deeds. c. FINAL PLATS. The final recorded plats must reference the operation and maintenance agreement and must also show all public rights-of-wav, dedicated common areas, and/or permanent drainage easements, in accordance with the approved plans. d. DEEDS. The permittee shall incorporate specific restrictions and conditions into a facility management plan or another legal instrument in lieu of deed restrictions and protective covenants. 7. CONSTRUCTION. During construction, erosion shall be kept to a minimum and any eroded areas of the on -site stormwater system will be repaired immediately. a. SCM OPERATIONAL PRIOR TO DEVELOPMENT. During construction, all operation and maintenance for the project shall follow the Erosion Control Plan requirements until the Sediment -Erosion Control devices are converted to SCMs. Once the device is converted to a SCM, the permittee shall provide and perform the operation and maintenance as outlined in the applicable section below. b. SCM RESTORATION. If one or more of the SCMs are used as an Erosion Control device and/or removed or destroyed during construction, it must be restored to the approved state stormwater design condition prior to close-out of the erosion control plan and/or project completion and/or transfer of the state stormwater permit. Upon restoration, a new or updated certification will be required for the SCM(s) and a copy must be submitted to the appropriate DEQ regional office. 8. MODIFICATIONS. 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 project 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 project 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), 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. 9. DESIGNER'S CERTIFICATION. Upon completion of the project, the permittee shall determine if the project is in compliance with the approved plans and take the necessary following actions: a. If the permittee determines that the project is in compliance with the approved plans, then within 45 days of completion, the permittee shall submit to the Division one hard copy and one electronic copy of the following: i. The completed and signed Designer's Certification provided in Attachment A noting any deviations from the approved plans and specifications. Deviations may require approval from the Division; ii. A copy of the recorded operation and maintenance agreement; iii. Unless already provided, a copy of the recorded deed restrictions and protective covenants; and iv. A copy of the recorded plat delineating the public rights -of -way, dedicated common areas and/or permanent recorded easements, when applicable. b. If the permittee determines that the project is not in compliance with the approved plans, the permittee shall submit an application to modify the permit within 30 days of completion of the project or provide a plan of action, with a timeline, to bring the site into compliance. 10. OPERATION AND MAINTENANCE. The permittee shall provide and perform the operation and maintenance necessary, as listed in the signed operation and maintenance agreement, to assure that all components of the permitted on -site stormwater system are maintained at the approved design condition. The approved operation and maintenance agreement must be followed in its entirety and maintenance must occur at the scheduled intervals. a. CORRECTIVE ACTIONS REQUIRED. If the facilities fail to perform satisfactorily, the permittee shall take immediate corrective actions. This includes actions required by the 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. b. MAINTENANCE RECORDS. Records of maintenance activities must be kept and made available upon request to authorized personnel of the Division. The records will indicate the date, activity, name of person performing the work and what actions were taken. 11. 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). 12. CURRENT PERMITTEE NAME OR ADDRESS CHANGES. The permittee shall submit a completed Permit Information Update Application Form to the Division within 30 days to making any one or more of the following changes: a. A name change of the current permittee; b. A name change of the project; c. A mailing address change of the permittee. 13. 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 Title 15A NCAC 02H.1045(2) and must be submitted upon occurrence of any one or more of the following events: i. The sale or conveyance of the project and/or property area in whole or in part; ii. Dissolution of the partnership, corporate, or LLC entity, subject to NCGS 55-14-05 or NCGS 57D-6-07 and 08; iii. Bankruptcy; iv. Foreclosure, subject to the requirements of Session Law 2013-121, 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. 14. COMPLIANCE. The permittee is responsible for complying with the terms and conditions of this permit and the approved plans and specifications until the Division approves the transfer request. a. REVIEWING AND MONITORING FOR COMPLIANCE. The permittee is responsible for verifying that the proposed BUA for the entire project does not exceed the maximum amount allowed by this permit. The permittee shall review and routinely monitor the project to ensure continued compliance with the conditions of the permit, the approved plans and specifications. b. 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. �;. DIVISION ACCESS. The permittee grants Division Staff permission to enter the property during normal business hours to inspect all components of the permitted project. d. 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. 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. OTHER PERMITS. The issuance of this permit does not preclude the permittee from obtaining and complying with any and all other permits or approvals that are required for this development to take place, as required by any statutes, rules, regulations, or ordinances, which are 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. Permit modified, updated and reissued this the 17t' day of September 2020. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Sian Wrenn, Director Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Attachment A Certification Forms The following blank Designer Certification forms are included and specific for this project: • As -Built Permittee Certification • As -Built Designer's Certification General MDC • As -Built Designer's Certification for Wet Detention Pond Project • As -Built Designer's Certification for Permeable Pavement Project A separate certification is required for each SCM. These blank certification forms may be copied and used, as needed, for each SCM and/or as a partial certification to address a section or phase of the project. State Stormwater Management Systems Permit No. SW8 021017 AS -BUILT PERMITTEE CERTIFICATION I hereby state that I am the current permittee for the project named above, and I certify by my signature below, that the project meets the below listed Final Submittal Requirements found in NCAC 02H.1042(4) and the terms, conditions and provisions listed in the permit documents, plans and specifications on file with or provided to the Division. Check here if this is a partial certification. Section/phase/SCM Check ere if this is part of a Fast Track As -built Package Submittal. Printed Name I, County of Signature a Notary Public in the State of do hereby certify that personally appeared before me this day of 120 and acknowledge the due execution of this as -built certification. (SEAL) Witness my hand and official seal My commission expires Pc=,u tee's Certificamon NCAC .1042(4) — 1 CO PItIzeI Nl A. DEED RES"I'IUCM014E / BUA RECORDS ----� 1. The deed restrictions and protective covenants have been recorded and contain the necessary language to ensure that the project is maintained consistent with the stormwater regulations and with the permit conditions. Y or N 2. A copy of the recorded deed restrictions and protective covenants has been provided to the Division. Y or N 3. Records which track the BUA on each lot are being kept. (See Note 1) Y or N H. MAMUN INCE ACCESS 1. The SCMs are accessible for inspection, maintenance and repair. Y or N 2. The access is a minimum of 10 feet wide. Y or N 3. The access extends to the nearest public right-of-way. Y or N C. EASEMViTSi 1. The SCMs and the components of the runoff collection / conveyance system are located in recorded drainage easements. Y or N 2. A copy of the recorded plat(s) is provided. Y or N D. S,IT+iGLE FAMILY' RESIDE:NTIAAL LOTS -Plats for residential lots ttw . 1 zvE an SCM snzltu�J y lhz fallowing: Y or N 1. The specific location of the SCM on the lot. Y or N 2. A typical detail for the SCM. Y or N 3. A note that the SCM is required to meet stormwater regulations and that the lot owner is subject to enforcement action as set forth in NCGS 143 Article 21 if the SCM is removed, relocated or altered without prior approval. Y or N E. OFF PATION ANIP nY INTENANCE AGREEMENT j Y or N 1. The O&M Agreement is referenced on the final recorded plat. Y or N 2. The O&M Agreement is recorded with the Register of Deeds and appears in the chain of title. Y or N T. T. OPERATION AND NIAPv I: NANC1E PLAN — maintenance records art being kept in a known set location for each SCM and are available for review. Y cr N Page 1 of 8 V4VI5W L Note 1-Acceptable State Stormwater Management Systems Permit No. SW8 021017 — has been p v to die - �• ARC approvals, as -built surveys, and county tax records. Provide an explanation for every requirement that was not met, and for every "N/A" below. Attach additional sheets as needed. Page 2 of 8 State Stormwater Management Systems Permit No. SW8 021017 AS -BUILT DESIGNER'S CERTIFICATION GENERAL MDC I hereby state that I am a licensed professional and I certify by my signature and seal below, that I have observed the construction of the project named above to the best of my abilities with all due care and diligence, and that the project meets the below listed General MDC found in NCAC 02H.1050 in accordance with the permit documents, plans and specifications on file with or provided to the Division, except as noted on the "AS -BUILT" drawings, such that the intent of the stormwater rules and statutes has been preserved. ❑ Check here if this is a partial certification. Section/phase/SCM Check here if this is a part of a Fast -Track As -Built Package Submittal per .1044(3). Check here if the designer did not observe the construction, but is certifying the project. Check here if pictures of the SCM are provided. Printed Name NC Registration Number Signature Date Consultant's Mailing Address: City/State/ZIP Phone Number Consultant's Email address: O Circle N if the as -built value differs from the Plan. If N is circled, provide an explanation on Page 2. OO N/E = not evaluated (provide explanation on page 2) OO N/A = not applicable to this SCM or project. Conntlltst's Cerdfirmm','io�.0 114;AC .1003((3) do Ckamrall R ;. Dic CFAs -built QDN/ . U N/A .1050 ; E ,A. TREATMENT REQUIREMENTS �I 1. The SCM achieves runoff treatment. Y or N 2. The SCM achieves runoff volume match. Y or N 3. Runoff from offsite areas and/or existing BUA is bypassed. Y or N 4. Runoff from offsite areas and/or existing BUA is directed into Y or N the permitted SCM and is accounted for at the full build -out potential. 5. The project controls runoff through an offsite permitted SCM Y or N that meets the requirements of the MDC. 6. The net area of new BUA increase for an existing project has Y or N been accounted for at the appropriate design storm level. 7. The SCM(s) meets all the specific minimum design criteria. Y or N & VEGETATED SETBACKS / BUA _ l . The width of the vegetated setback has been measured from Y or N the normal pool of impounded waters, the MHW line of tidal waters, or the top of bank of each side of rivers or streams. 2. The vegetated setback is maintained in grass or other Y or N vegetation. 3. BUA that meets the requirements of NCGS 143-214.7 (b2)(2) Y or N is located in the setback. 4. BUA that does not meet the requirements ofNCGS 143-214.7 Y or N b2 2 is located within the setback and is limited to: Page 3 of 8 State Stormwater Management Systems Permit No. SW8 021017 a. Publicly funded linear projects (road, greenway sidewalk) b. Water -dependent structures c. Minimal footprint uses (utility poles, signs, security lighting and appurtenances) 5. Stormwater that is not treated in an SCM is released at the Y or N edge of the setback and allowed to flow through the setback as dispersed flow. _�. I ERr �4E. I TAs-buih: i ®N/A ! C. ST13 ,IWATER OUTLETS — the outlet handles the peak flow,� Y ITT ` frarn the 10 year storm with s o downslope erosion. t� { . i D. VARit.ATFO_NS 1. A variation (alternative) from the stormwater rule provisions Y N has been implemented. or 2. The variation provides equal or better stormwater control and Y N e ual or better Uotection of surface waters. or E. C MPI.IAN-.-.. _TITH OTEM REGULATOWY N PROGRAMS has been met.Y or ': SIZING -the volume efthe SCM takes the runoff from all surfaces into accounit and is sufficient to handle the required storm I Y or N depth. I G. CONTA3UNATED► �S—:infiltratingSCM!'szrvntiocate_Y_ _' y in or on areas with c yntgLutinded wad. . { I, SIDE SLOPES j 1. Vegetated side slopes are no steeper than 3H:1V. Y or N 2. Side slopes include retaining walls, gabion walls, or other Y or N surfaces that are steeper than 3H:IV. 3. Vegetated side slopes are steeper than 3H:1 V (provide Y or N supporting documents for soils and vegetation). L FROSION PROiTEMON. 1. The inlets do not cause erosion in the SCM. Y or N 2. The outlet does not cause erosion downslope of the discharge Y or N point during the peak flow from the 10 year storm. J. EXCESS FLOWS, — An overflow / bypass has bees, prwided. Y or N K. DEWATER — A method to drawdown ttandinL water has Y or N been provided to fwilu me nutiatenance and 9rrs tion_ L. ,',-F ANO r'f F'-r C NS'YlltL'MOIq — ibe SCM has been Y or N cleaned out and cmverted tD its n xov ed des"An M. MA_ LN TUN. .INEr'E ACCFSS 1. The SCM is accessible for maintenance and repair. Y or N 2. The access does not include lateral or incline slopes >3:1. Y or N N. DESIGNER QUALEFICATIONS {FAST -TRACK PEl0 4-� i — Tht Jtzi ,,r=cr is Fzem d under ChiptersSOA, 99C, 19E. or 891F of Y car N the Gcneral Sratute&'. Provide an explanation for every MDC that was not met, and for every item marked "N/A" or "N/E", below. Attach additional pages as needed: Page 4 of 8 State Stormwater Management Systems Permit No. SW8 021017 AS -BUILT DESIGNER'S CERTIFICATION FOR WET DETENTION POND PROJECT I hereby state that I am a licensed professional and I certify by my signature and seal below, that I have observed the construction of the project named above to the best of my abilities with all due care and diligence, and that the project meets all of the MDC found in NCAC 02H.1053, in accordance with the permit documents, plans and specifications on file with or provided to the Division, except as noted on the "AS -BUILT" drawings, such that the intent of the stormwater rules and the general statutes has been preserved. ❑ Check here if this is a partial certification. Section/phase/SCM ec c ere if s is part of a Fast -Track As -Built Package Submittal per .1044(3). Check here if the Designer did not observe the construction, but is certifying the project. Check here if pictures of the SCM are provided. Printed Name NC Registration Number SEAL: Signature Date Consultant's Mailing Address: City/State/ZIP Phone Number Consultant's Email address: iO Circle N if the as -built value differs from the Plan/permit. If N is circled, provide an explanation on page 2 OO N/E = not evaluated (provide explanation on page 2) OO N/A = not applicable to this project or SCM. This Certification must be completed in conjunction with the General 1VIDC certification under NCAC 02H.1050 ConsuIuuv's CeTtification (MDR .1353) PTAs -built MN/E ON/A A. Forebay I Depths / F76antais - ---------- 1. The available Sediment storage is consistent with the approved Y N plan and is a minimum of 6 in. or 2. Water flow over the forebay berm into the main pond occurs at a Y N non -erosive velocity. or I The provided Forebay Volume is 15%-20% of the main pool Y N volume. or 4. The Forebay entrance elevation is deeper than the exit elevation Y N into the pond. or 5. The Average Design Depth of the main pond below the Y N permanent pool elevation is consistent with the permitted value? or 6. Fountain documentation is provided. Y or N B. Side sTot)es / Basks / Vegetated SWf 1. The width of the Vegetated Shelf is consistent with the approved Y N Tans and is a minimum of 6 feet. or 2. The slope of the Vegetated Shelf is consistent with the approved Y N plans and is no steeper than 6: 1. or C. As -built Waiu Pool f ivm- / Vatum- M Flevations 1. The permanent pool surface area provided is consistent with the Y N permitted value. or 2. The Terapor°ary Pool Volume provided is consistent with'[he Y N permitted value. or Page 5 of 8 State Stormwater Management Systems Permit No. SW8 021017 3. The permanent pool elevation is consistent with the permitted Y N value. or 4. The temporary pool elevation is consistent with the permitted Y N value. or Q A 5-built QNFE ON/A. D. tukb / Omdet / Dr town 1. The dcsign volume draws down in 2-5 days. Y or N 2. The size of the Orifice is consistent with the permitted value. Y or N 3. A trash rack is provided on the outlet structure. Y or N 4. Hydrologic impacts to the receiving channel are minimized from Y or N the 1 yr 24 hr storm discharge? 5. The inlets and the outlet location are situated per the approved Y or N plan and avoid short-circuiting. E. V eeei9tion � 1. The vegetated shelf has been planted with a minimum of 3 Y N diverse species. or 2. The vegetated shelf plant density is consistent with the approved plans and is no less than 50 plants per 200 sf or no less than 24 Y or N inches on center. Provide an explanation for every MDC that was not met, and for every item marked "N/A" or "N/E" below. Attach additional pages as needed: Page 6 of 8 State Stormwater Management Systems Permit No. SW8 021017 AS -BUILT DESIGNER'S CERTIFICATION FOR PERMEABLE PAVEMENT PROJECT I hereby state that I am a licensed professional and I certify by my signature and seal below, that I have observed the construction of the project named above to the best of my abilities with all due care and diligence, and that the project meets all of the MDC found in NCAC 02H.1055 in accordance with the permit documents, plans and specifications on file with or provided to the Division, except as noted on the "AS -BUILT" drawings, such that the intent of the stormwater rules and the general statutes has been preserved. ❑ Check here if this is a partial certification. Section/phase/SCM r__1 H Check here if this is a part of a Fast -Track As -Built Package Submittal per .1044(4). Check here if the Designer did not observe the construction, but is certifying the project. El Check here if pictures of the SCM are provided. Printed Name NC Registration Number SEAL: Signature Date Consultant's Mailing Address: City/State/ZIP Phone Number Consultant's Email address: i0 Circle N if the as -built value differs from the Plan. If N is circled, provide an explanation on Page 2. OO N/E = not evaluated (provide explanation on page 2) OO N/A = not applicable to this project or SCM This Certification must be completed in conjunction with the General MDC certification under NCAC 02H.1050 Consultmfs Certificai n (bffiX'; .1055) OAs-built (QN/ ON/ E A A. DESIGN / DRAWDOWN 1. Washed aggregate base material has been used. Y or N 2. The provided amount of permeable pavement surface area is Y N consistent with the approved plans. or 3. The amount of non -roof adjacent built -upon area is consistent with the approved plans and is directed onto the permeable pavement Y or N surface and does not exceed the required 1:1 ratio Aa/A . 4. The runoff from adjacent pervious areas is prevented from reaching the permeable pavement except for incidental, Y or N unavoidable runoff from stable vegetated areas. 5. The permeable pavement infiltrates the design volume to the Y N bottom of the sub de within 72 hours. or 6. If the permeable pavement was installed as a detention system, the drawdown assembly releases the stormwater stored in the Y or N aggregate in 2-5 days. B. SOri c i SH%721 / SUBGRADE 1. The hydraulic properties and characteristics of the in -situ soils Y N conform to the soils report. or Page 7 of 8 State Stormwater Management Systems Permit No. SW8 021017 2. For infiltrating permeable pavement, the lowest point of the Y N system is a minimum of 2 feet above the SHWT. or 3. For infiltrating permeable pavement, if the lowest point of the system is less than 2 feet above the SHWT, the soils have been Y or N modified to assure drawdown within 72 hours. 4. The in -situ soils have been removed and replaced with infiltration Y N media in accordance with the approved plan. or 5. Infiltration media has been placed on top of in -situ soils. Y or N (DAAs-bulIt ON/ G)N/ E A C. CONSTRUCTION 1. At least one capped observation well has been provided at the low Y or N point of each permeable pavement area? 2. The subgrade is terraced in accordance with the approved plans and has at least one capped observation well within each terrace Y or N section. 3. For PICP and concrete grid pavers, an edge restraint has been Y or N used around the perimeter of the permeable pavement. 4. The subgrade for infiltrating permeable pavement was graded Y or N when it was and there was no precipitation. �+� �7 D. f �'ERYWICATI-01i 1. The infiltration rate of the pavement surface is at least 50 inches Y N per hour using a head less than orequal to four inches. or 2. After installation, the permeable pavement was protected from Y N sediment deposition. or 3. The site is complete and stabilized. Y or N Provide an explanation for every MDC that was not met, or for every item marked "N/E" or "N/A", below. Attach additional pages as needed: Page 8 of 8 Operation & Maintenance Agreement Project Name: Project Location: UNCW P3 Freshman Housing UNCW Campus maintenance records snail be Kept on the following BMP(s). This maintenance record shall be kept in a log in a known set locatic 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 pollutant removal efficiency of the BMP(s). The BMP(s) on this project include (check all that apply & corresponding O&M tables wil Bioretention Cell Quantity: Dry Detention Basin Quantity: Grassed Swale Quantity: Green Roof Quantity: Infiltration Basin Quantity: Infiltration Trench Quantity: Level SpreaderNFS Quantity: Permeable Pavement Quantity: Proprietary System Quantity: Rainwater Harvesting Quantity: Sand Filter Quantity: Stormwater Wetland Quantity: Wet Detention Basin Quantity: Disconnected Impervious Area Present: User Defined BMP Present: Location(s) Location(s) Location(s) Location(s) Location(s). Location(s) Location(s) Location(s) Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): 1 No No ilia corner I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to the system or responsible party. Responsible Party: Mark Morgan Title & Organization: UNCW, Associate Vice Chancellor for Business Affairs - Facilities Street address: 601 South College Road City, state, zip: Wilmington, NC 28403 Phone number(s): 910.962.3761 Email: morgenm@uncw.edu r �U Signature: (/ Date: 26 a Notary Public for the State of Ak ter : xa County of / ICIi ad1rmixr, do hearby certify that personally appeared before me this day of _&Udt MA Ae f 9 and acknowledge the due execution of the Op nd Maintenan Agr nt . Witness my ha\�¢+�Ial, �`\ P Ali NswNot f' ECEIVE !81• ` �k � - MAR 0 4 2019 L1N Seal My commission expires 71- & / 9 STORM-EZ 2/4/2019 Version 1.4 O&M Manual Page 1 of 4 Wet Detention Pond Maintenance Requirements The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. 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: Potential problem: How I will remediate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the BMP Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then plant a erosive gullies have formed. 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 approximately six inches. long. The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the swale. Regrade the swale if necessary to smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and replace with clean stone. covered in sediment (if applicable). The forebay Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location whore it original design depth for will not cause impacts to streams or the BMP. sediment storage. 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 practices show that pruning is needed to maintain optimal plant health. Plants are dead, diseased or dying. Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. STORM-r-e- Version 1.4 ECE IVE MAR 0 k 2019 2/4/2019 O&M Manual �Y:_. -- Page 2 of 4 Wet Detentlon on ntenance RequiroMts t nu The main treatment area Sediment has accumulated to a depth greater than the Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it original design sediment will not cause impacts to streams or the BMP. storage depth. Algal gruwih covers over 50% of the area. Consult a professional to remove and control the algal growth. Cattails, phragmites or other invasive plants cover 50% of Remove the plants by wiping them with pesticide (do not spray). the basin surface. The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and consult a professional to remove beaver activity is present. beavers. A tree has started to grow on Consult a dam safety specialist to remove the tree. the embankment. 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 Department of Environment and Natural damage have occurred at the Resources Regional Office. outlet. 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. STORM-EZ Version 1.4 ECEIVE MAR 0 4 2019 BY:- ___ ___ 2/4/2019 O&M Manual Page 3 of 4 Wet Detention Pond Design Summary Net Pond Diagram WET POND ID FOREBAY SCM-1 Permanent Pool El. 30 MAIN POND Permanent Pool El. 30 Pretreatment other No Temporary Pool El: Clean Out Depth: 33 S Temporary Pool El: Clean Out Depth: 33 8 than forebay? Sediment Removal El: 22 Sediment Removal El: 22 Has Vag. F-1;tal—f I No I Bottom Elevation: 1 21 j Bottom Elevation: 21 MAR 18 2019 BY:____..._.-_---- ____.. STORM-EZ 3/15/2019 Version 1.4 O&M Manual Page 4 of 4 DEMLR USE ONLY Date Rqceive Fee Paid Permit Number 9 � I Jv o Gwx a Applicable Rules: M Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph 11- Post Construction (select all that apply) ❑ Non -Coastal SW- HQW/ORV%" Waters ❑ Universal Stormwater Management Plan ❑ Other WQ M mt Plan: State of North Carolina Department of Environment and Natural Resources Division of Energy, Mineral and Land Resources��� r 9 ► �a STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form mat/ be photocopied for use as an original L GENERAL INFORMATION 1. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans specifications, letters, operation and maintenance agreements, etc.): UNCW Southeast Dining Facility 2. Location of Project (street address): Price Drive City:Wilmington County:New Hanover Zip:28403 3. Directions to project (from nearest major intersection): From the intersection of South College Road and Hurst Drive turn into UNCW's campus Turn left at the intersection of Hurst Drive and Hamilton Drive. Proceed until you reach Riegel Road Turn into Riegel Road and proceed until you reach Price Drive. The Dining Hall will be approximately 0 35 mi down Price Dr. 4. Latitude:34° 13' 27.12" N Longitude:; i' 52' 8.76" W of the main entrance to the project. H. PERMIT INFORMATION: 1. a. Specify whether project is (check one): ❑New ®klodification ❑ Renewal w/ Modificationt tReneu,als witlr modifications also requires SYVU-102 - Reneznal Application Forin b.If this application is being submitted as the result of a modification to an existing permit, list the existing permit numberSW8 021017 , its issue date (if knoivn)Apri14, 2019 ,and the status of construction: ®Not Started ❑Partially Completed* ❑ Completed* "ppro€ide a designer's certification 2. Specify the type of project (check one): ❑Low Density ®High Density ❑Drains to an Offsite Stormwater System ❑Other If this application is being submitted as the result of a previously returned application or a letter from DEMLR requesting a state stormwater management permit application, list the stormwater project number, if assigned, and the previous name of the project, if different than currently proposed, 4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ❑NPDES Industrial Stormwater ®Sedimentation/Erosion Control: 4.63 ac of Disturbed Area ❑404/401 Permit: Proposed Impacts b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number, issue date and the type of each permit: 5. Is the project located within 5 miles of a public airport? ❑No ®Yes If yes, see S.L. 2012-200, Part VI: http://portal.ncdenr.org/web/lr/rules-and-regulations `OUP I AUO 14 2020 Fbnn SWU-10l Version Oct. 31, 2013 Page 1 of 6 III. CONTACT INFORMATION 1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the Rroject): Applicant/Organization:University of North Carolina - Wilmington Signing Official & Title:Mark D. Morgan Associate Vice Chancellor for Business Affairs - Facilities b. Contact information for person listed in item 1a above: Street Address:601 South College Road City:Wilmington State:NC Zip:28403 Mailing Address (if applicable):See above. City: Phone: (910 ) 962-3761 Email:morganm@uncw.edu State: Zip: Fax: ( ) c. Please check the appropriate box. The applicant listed above is: ® The property owner (Skip to Contact Information, item 3a) ❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below) ❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and 2b below) ❑ Developer* (Complete Contact Information, item 2a and 2b below.) 2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the person who owns the property that the project is located on): Property Owner/Organization: Signing Official & Title: b. Contact information for person listed in item 2a above: Street Address: City: Mailing Address (if applicable): City: State: State: Phone: ( ) Fax: Zip: Zip: 3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other person who can answer questions about the project: Other Contact Person/Organization:McAdams Signing Official & Title:Daniel 4Viebke PE CFM - Project Manager b. Contact information for person listed in item 3a above: Mailing Address:2905 Meridian Parkway City:Durham Phone: (919 ) 361-5000 Email:wiebke@mcadamsco.com 4. Local jurisdiction for building permits: State:NC Fax: L'aipt of.Corttact; Phone #: Form SWU-101 Version Oct. 31, 2013 Page 2 of 6 Zi:27713 1EG-F AUG i 4 20M IV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. Treatment will be provided for the dining hall and associated infrastructure by the P3 Pond which was previously designed and constructed in association with the P3 Freshman Housing 1roject This SCM is permitted under SWS 021017. Stormwater runoff will be riped from the dininghall to the dovmstr-a n SCM (wet detention pond referred to as SCM-1). 2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued Date: ❑ Other: Date: b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with: ❑ Coastal SW -1995 ❑ Ph II - Post Construction 3. Stormtiater runoff from this project drains to the Cape Fear River basin. 4. Total Property Area: 30.31 acres 5. Total Coastal Wetlands Area: 0 acres 6. Total Surface Water Area: 0 acres 7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project Area-':30.31 acres * Total project area shall be calculated to exclude the following: the normal pool of impounded structures, the area between the banks of streams and rivers, the area below the Normal Hi h Water (NHM line or Mean High Water (MHVV) line, and coastal wetlands landward from the NHW (or MHI� line. The resultant project area is used to calculate overall percent built upon area (BLIA). Non -coastal wetlands landward of the NHW (or MHM line may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area / Total Project Area) A 100 = 43.15 % 9. How many_ drainage areas does the project have?3 Drainage Areas (For high density, count 1 for each proposed engineered stormwater BMP. For Iow density and other projects, use 1 for the whole propertiy area) 10. Complete the following information for each drainage area identified in Project Information item 9. If there are more than four drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basin Information Drama a Area _ Drainage Area _ Draina Area _ Drainage Area Receiving Stream Name _ Stream Class * Stream Index Number See Attachment A. Total Drainage Area (sf) On -site Drainage Area (sf) Off -site Drainage Area (sf) Proposed Impervious Area** (s go Impervious Area** total Im ervious' Surface Area Drainage Area _ Drainage Area _ Drain Area _ Drainage Area On -site Buildings/Lots (sf) _ On -site Streets (sf) On -site Parking (sf) On -site Sidewalks (sf) Other on -site (so Future (st) Off -site (sf) Existing BUA*** (sf) Total (so: Stream Class and Index Number can be determined at: ht : ortal.ncdenr.o eb IWWAR Z Impervious area is defined as the built upon area including, but not limited to, buildings, roa arking areas q sidewalks, gravel areas, etc. Form SWU-101 Version Oct. 31, 2013 Page 3 of 6 *** Report only Ntat atttottttt of existing BUA that will retnain after developtnent. Do not report any existing BUA that is to be removed and which will be replaced by new B LIA. 11. How was the off -site impervious area listed above determined? Provide documentation. N/A Proiects in Union Countv: Contact DEI1.1LR Central Office siaJJ'to check if the project is located ivithin a Threatened & Endangered Species iratershed that mtty he subject to tnoi•c stringent stormwater regairerrtenty as per 15A NCAC 02B .0600. V. SUPPLEMENT AND O&M FORMS The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded from http://portiil.ncdenr.org/web/wg/ws/su/bmp-manual. VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed application instruction sheet and BMP checklists are available from ht!p://12ortal.ncdenr.org/web/­wq/­ws/su/statesw/`forms does. The complete application package should be submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the interactive online map at http://12ortal.ncdenr.org/web/wq/ws/su/maps.) Please indicate that the following required information have been provided by initialing in the space provided for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions for each submitted application package from hqp://portal.ncdenr.org/web/wq/ws/su/statesw/forms docs. Initials 1. Original and one copy of the Stormwater Management Permit Application Form. DCW 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants Form. (if required as per Part WI belou,) 3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M agreement(s) for each BMP. 4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to hft://www.envhelp.org/pages/onestol2exl2ress.html for information on the Express program and the associated fees. Contact the appropriate regional office Express Permit Coordinator for additional information and to schedule the required application meeting.) 5. A detailed narrative (one to two pages) describing the stormwater treatment/management 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the 1h mile radius on the map. 7. Sealed, signed and dated calculations (one copy). 8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including: a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. e. North arrow. f. Scale. g. Revision number and dates. h. Identify all surface waters on the plans by delineating the normal pool elevation of impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal waters, and any coastal wetlands landward of the MHW or NHW lines. • Delineate the vegetated buffer landward from the normal pool elevation of impounded structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters. i. Dimensioned property/project boundary with bearings & distances. j. Site Layout with all BUA identified and dimensioned. k. Existing contours, proposed contours, spot elevations, finished floor elevations. 1. Details of roads, drainage features, collection systems, and stormwater control measures. m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a qualified person. Provide documentation of qualifications and identify the person who 'made 'the determination on the plans. i; n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations. o. Drainage areas delineated (included in the main set of plans, not as a separate document). Form SWU-101 Version Oct. 31, 2013 Page 4 of 6 DCW DCW for DCW 1)C'W Jff�' 1yVo V- p. Vegetated buffers (where required). 9. Copy of any applicable soils report with the associated SHWT elevations (Please identify DCW elevations in addition to depths) as well as a map of the boring locations with the existing elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the project area clearly delineated. For projects with infiltration BMPs, the report should also include the soil type, expected infiltration rate, and the method of determining the infiltration rate. (Infiltration Devices submitted to WiRO: Schedule a site visit for DEMLR to verify the SHWT prior to submittal, (910) 796-7378.) 10. A copy of the most current property deed. Deed book RB 6151 Page No: 842-855 DCW It. For corporations and limited liability corporations (LLC): Provide documentation from the NC DCW Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in Contact Information, item la, 2a, and/or 3a per 15A NCAC 2H.1003(e). The corporation or LLC must be listed as an active corporation in good standing with the NC Secretary of State, otherwise the application will be returned. http://www.secretary.state.nc.us/Corporations/CSearch asvx VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and protective covenants forms can be downloaded from http://portal.ncdenr.org web/Lr/state- stormwater-forms docs. Download the latest versions for each submittal. In the instances where the applicant is different than the property owner, it is the responsibility of .the property owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring that the deed restrictions are recorded. By the notarized signature(s) below, the permit holder(s) certify that the recorded property reshirtions and protective covenants for this project, if required, shall include all the items required in the permit and listed on the forms available on the website, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the NC DEMLR, and that they will be recorded prior to the sale of any lot. VIIL CONSULTANT INFORMATION AND AUTHORIZATION Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as addressing requests for additional information). Consulting Engineer:Daniel Wiebke, PE, CFM Consulting Firm: McAdams Mailing Address:2905 Meridian Parkway City:Durham Phone: (919 ) 361-5000 Emai>:wiebke@mmdamsco. com State:NC Zip:27713 Fax ( ) DL PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filledIout,, complete this section) I, (print or type name of person listed in Contact Information, item 2a) ` certify that I own the property identified in this permit application, and thus give permission to (print or typ=me of person listed in Contact Information, item 1a) with (print or type namq,of oxgamzati6n listed in Contact Information, item 1a) to develop the project as 6 ntly}pr*ds'e' q A,copy of the lease agreement or pending property sales contract has been provided with the su `"' • , w party responsible for the operation and maintenance of the stormwater system.Fugh $ilncates the � , -�. AUK i 4 2020 Form SWU-101 Version Oct. 31, 2013 Page 5 of 6 Im 6 As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their lease agreement, or pending sale, responsibility for compliance with the DEMLR Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DEMLR immediately and submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6. Signature: Date: a Notary Public for the State of , County of do hereby certify that before me this _ day of personally appeared , and acknowledge the due execution of the application for a stormwater permit. Witness my hand and official seal, SEAL My commission expires X. APPLICANT'S CERTIFICATION I, (print or type name of person listed in Contact Information, item 1a) Mark D. Morgan certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of the applicable stormwater rules under 15A NCAC 2H .1000 and any other applicable state stormwater requirements. 2 2Q'ZD Date: r�. I, �4le,cau,a�ler , a Notary Public for the State of aiptk Gftl;wL, County of Q Oe do hereby certify that ► (k t k. It)()o rQa -y- personally appeared before me this 4eday of, and ac ge the due exe ution o the application for a stormwater permit. Witness my hand and official seal, A L Notary Public O New Hanover County My Comm. Exp. Z 07-03-2024 Q.. CARC)V SEAL My commission expires ! 'J- c�24/2 ECG T. it.- AUG 14 2020 � Form SWU-101 Version Oct. 31, 2013 Page 6 of 6 t A! IA 14 2M � I' Permit No. 56ULF02 /00— (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. 1. PROJECT INFORMATION Project Name: UNCW Surface Parking Lot, Parking Lot O, Code 49728 item 304 Contact Person: Mark Hargrove, P.E. Phone Number: 762-4200 x250 For projects with multiple basins, specify which basin this worksheet applies to: NA, single basin elevations Basin Bottom Elevation 30 ft. (floor of the basin) Permanent Pool Elevation 34 ft. (elevation of the orifice) Temporary Pool Elevation 34.81 ft. (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 2.940 sq. fk (water surface area at the orifice elevation) Drainage Area 1.24 ac. (on -site and off -site drainage to the basin) Impervious Area 0.76 ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume 3,027 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 2,723 cu. ft. (volume detained above the permanent pool) Forebay Volume 656 cu. ft. (approximately 20% of total volume) other parameters SAIDA' 5.43 (surface area to drainage area ratio from, DWQ table) Diameter of Orifice 0.75 in. (2 to 5 day temporary pool draw -down required) Design Rainfall 1.0 in. Design TSS Removal 90 % (minimum 85% required) Footnotes: When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for nonstandard table entries. In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal FormSNVU-102 Rev 3.99 Page 1 of 4 H. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H. 1008. r^�*gal in the space provided to �ndivate the follo.ri:.g desig^^.. requiieu.ents have been met and supporting dGCiiiiieiitation iS T-4, attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initials JM 10 a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). b. The forebay volume is approximately equal to 20% of the basin volume. c. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) f. The basin length to width *ratio is greater than 3: 1. �) g. The basin side slopes above the permanent pool are no steeper than 3: 1. h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). i. Vegetative cover above the permanent pool elevation is specified. :M j. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right-of-way. 1. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin. in. A mechanism is specified which will drain the basin for maintenance or an emergency. III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT 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) O does O does not incorporate a vegetated filter at the outlet. This system (check one) O does O does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). 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 When the permanent pool depth reads Sediment Bottom El. 3------------ on -3 o FOREBAY 3.0 feet in the main pond, the sediment shall be removed. 1.5 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation Sediment Removal Elevation 31 175% Bottom Elevation :5 © 4r 25% MAIN POND: 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These plants shall be encouraged to grow along the vegetated shelf and forebay berm. 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. 7. All components of the wet detention basin system shall be maintained in good working order. Form SWU-102 Rev 3.99 Page 3 of 4 I acknowledge and agree by my signature below that I am responsible for the performance of the seven 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. Print name: Timothy A. Jordan Title: Vice Chancellor Business Affairs, UNC-W Address: 601 South College Road Phone: 962-7317 Date: Signature: W Note: The legally responsible part should not be a homeowners association unless more than 50% of &e lots have been sold and a resident of the subdivision has been named the president. I, a Notary Public for the State ofA lam CA County of ,4efil/ do hereby certify that personally appeared before me this day of r7 ,71J�2 and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SEAL My commission expires �f —� �c�O US Form SWU-102 Rev 3.99 Page 4 of 4 Np,\ rrrrrr o co pR°-k :z cNn m �: Qom. Al R v m w th to C- m ° 3 m a 0m� 3 �m•�o =r O CD 9 n O, C_ 0 3 3 - -° Co m a S° V 7 m m m ' o fD o m o ° D0. m o m a. tS W. 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IN N :{iCO ij�O` m iQ1I0im IW1m �q co lq , f! +W IW INI INIW Ot,IZ ° I�Ijj�r� fpl �V!� A:O ai °I�;m `z'� I ZIm jo j(�lji�i N.A I!J�w'N N W! oj0 i OIL �,y- V! 1 IN1 wl O�O i I O i A O I IAIW �> M `'I 0 0 1 ;!; I! 'w 1 i,o an.m iW O �NOi 1! M, 1rm m: 3 m m Im m .I V V rn m (p, p m O w P N I tD3 79 i>mO o � _ 3 (A m m r : ° m p ImO mmm mm = m x io 'cl�mm �O S mo o$ Er mmmw � =r <r1mw m°i o, Bc$ wnw r�o m @ $ o° o c w o > > S SSs m n > n m 3 mOIm 3 mcm a ^Cyamm, a! ma " 7aiC -, n am jIm'm m �3m o I9c� OO n (mtEr om t�p co O m m 'o m Ca y 10 o 3m 3 T � % yOw 0 mrr ( 900s f I -5 m R'om CL m in a o w ° $ m �IEIm V cn ° 5m m aOc mn3 3 � f a w o Zn a m I mimja II ><mm o mcs o m m COC .a .c 3m 3 � m aCL I�o km 0 -oo c ms QQarm ''o m ' m ro c O? 'm m F5 CO Ic 2 o IA ! g F 1 m+ v a. is e m m o O 'm 3 p �'' 2 m a m o fa Rr C K m $, .J m o V- a a - 'C 0 n q m 3 al i$ m Ic 3 D v F o= fD o .J m. J x e m ! mCD ro +�; ! a IN a 3 e m a ? O O n Nn 0' J d; 1 f '' i! '� 'p N�� � � •m .m m , ig Ig ,'OI •Z !m °m �A 10 ,w Iw :O i iJ 1 ���,yice' O��� �°1 i@ ica,o '3 i0 N m`.� i I �im�'(�p w;�O lw I 1 �'(�p I iW w .m ! 1(�p Iw a4y !!m;- �C,A: Ni(Vjl! I� WiN i0- mlA ! IO O!- iN ! INS ! W IyI I g; I 1� O I I i NINI N: OI i .°OI�WIrn O fO . OD 1V. � JR i �1 7 FORMS LOADED IJECT INFORMATION Project Name UNCW Southeast Dining Facility . - Project Area ac _ Coastal Wetland Area ac — --- � ....------•-•--•--•- --- _ 3031 - 0 -•----••---•-•--- Surface Water Area ac -_._...___—.._--_._..--.....0.._-__•_---•-•--_--_-•-.- Is this project High or Low Density? �No — - Does this project use an off -site SCM? PUANCE WITHy02H .1003(4) Width of vegetated setbacks provided et) -_� -_ 50 Will the vegetated setback remain vegetated? Yes Is BUA other that as listed in .1003(4)(c-d) out of the setback? Yes Is streambank stabilization proposed on this project? No IER AND TYPE OF SCMs: Infiltration System-_vW._. �_ -, ��r_ u.•�--_- :-. -. = p �Ieretew400n Coll '- lit---- Wat Pans — SRonm atsr Wafland Parariaat Va Pavement --- - --- ® -_ - -- Sand fitter 0 0 ----- .. _ ---- Rainwater Harvesting RWH Green Roof 0 - Level Spreader -Filter Strip (LS-FS) — �- ---___------- ®_—.-- -'_-- 0 Disconnacted Impervious Surface DIS Treatment Swale --_-. ..._0_.__.--•------__ - Dry Pond _.._ 0—----.._ 0 StormFUter - Sliver CO 0 ---'-- - -- - FilCarra 0 FORMS LOADED MHER CEtoTIMATIOM Name and TMe � --- --- Danreo W, is a['�, PE, CFM Organization: Street address: - -.. _ _ -__ McAdams 2905 Meridian Parkway _ city. State, Zip: _ — Durham, NC 2_7-713 __- 919 361-5000 _ Phone number(s)_ _ 'Email: wiebke@mcadamsco.com Certification Statement. I certify, under penalty or law that this Supplement-Q form and all supporting information were prepared under my direction or supervision: that the information provided in the 'form is, to the best of my knowledge and behef, true: accurate, and complete: and that the engineering plans: specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here `%%%II,...Iillf/ `�.�V% CAROB •`?p�o�Essio�'tif % a SEAL r 043300 i ' •• N61 NE ' .�' 10 q�c c v��.�`'• 0 ''//f1�lt't111 ea Signature of Designer Date Z_ i�..1uLO %4 _ Is this a hil h density prgect?� Yes I' f so, number of drainage areas/SCMs 1 _--T i Is all/part of this project subject to previous rule versions? No FORMS LOADED LINAGE AREA INFORMATION Entire Site rType of SCM Wet Pond 7 _ Wet Pond Total BUA in ro•ect sq ft) _ 596022 sf 595022 sf New BUA on subdivided lots (subject to permitting); sq ft) _ �New BUA outside of subdivided lots (subject to _Ipermitting)(s>7 ttOffsite - total area (sq ft) IOffsite BUA (sq ft) Breakdown of new BUA outside subdivided lots: Parking (sq ft) sf sf j - Sidewalk (sq ft) _ 24227 sf; 24227 sf 22736 sf tl 22736 sf I - Roadway (sq ft) _1=Futures ft _ 14825 sf 126897 sf 14825 sf a 126897 sf - Other, please specify in the comment box below sq ft) _ _ _ _ _ _ New i' nfiltrating permeable pavement on subdivided lots (sq ft) New infiltrating permeable pavement outside of (•subdivided lots (sq ft) ! 3744 sf 3744 sf I. ___ Exisitng BUA that will remain (not subject to ermittin (s ft _ __ 403593 sf 403593 sf Existing BUA that is already permitted (sq ft) _ Existing BUA that will be removed (sq ft) _ Percent BUA 45.15% 45.15% __ Design storm inches_ rDes!n volume of SCM (cu ft) Calculation method for design volume 1.5 in 1.5 in 92810 of 92810 cf 1_ITIO_NAL INFORMATION_ Please use this space to provide any additional information about the (drainage area(s):__ lte Other = Gravel & Grass Pave. Note - Entire Site and Drainge Area 1 ain the same information as there is ultimately one SCM and thus one cage area to it. This drainage area is broken down further on Attachment permitting purposes to reflect separate projects that have occurred/will i[ ••,aF.in3ha �Iryina'+o a•q�.,�����,..�..��o-c.•�r-...ia-,�.rz _ .- _ ._ JINAGE AREA INFORMATION Entire Site NIA"' Wei Pond Type of SCM Total BUA from project (sq ft) 596022 sf 596022 sf _ 1995 rules 1 SL 2006-246 I 2008 rules I 2017 rules New BUA on subdivided lots (subject to permitting) (sq ft) I 1995 rules SL 2006-246 2008 rules _ _ I 2017 rules _ _ i New BUA outside of subdivided lots (subject to permitting) (sf) 1 1995 rules _ -SL 2006-246 2008 rules 2017 rules 596022 sf 596022 sf _ Offsite -total area (sq ft)� I _ _ 1995 rules 2006-246 _ _SL 2008 rules 2017 rules Offsite BUA (sq ft) 1995 rules a1 nnnc - 1017 CL' %s W Ign storm (inches) 1.5 in 1 Bin 4995 rules— - SL 2005-246 2008 rules _ 2017 rules 11 Breakdown of new BUA: �` 1 - Parking (sq ft sf sf - Sidewalk ft 24227 sf 24227 si - Roof (sq ft 22736 sf 22736 sf - Roadway ft 14825 sf 14825 sf - Future (sq ft i 26897 sf 126897 sf - Other, please specify in the comment box t r below (sq ft ! 3744 sf 3744 sf New infiltrating permeable pavement on _ i subdivided lots ft I New infiltrating permeable pavement outside of subdivided lots (sq ft) Exisitng BUA that will remain (not subject to �— ermittin Existing BUA that is already permitted sq ft~ —f•-- 403593 sf 403593 sf Existin BUA that will be removed (sq ft _ Percent BUA 45.15% 45.15% Design volume of SCM cu ft92810 cf _ _ _ _ 92810 cf Calculation method for design volume �ITIONAL INFORMATION (Please use this space to provide any additional information about the drainage area(s): :I _ to Other = gravel. See original SIA and other materials from McKim & Pd for more information regarding drainage areas and SCM design. ET POND 11 Drainage area number 2! Design volume off 3CM (cu R) — 92II99 cff :RAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? 4 Is the SCM located away from contaminated soils? 5 What are the side slopes of the SCM (H:V)? Does the SCM have retaining walls, gab -ion walls or other engineered 6 side slopes? Are the inlets, outlets, and ^-- u � -----_.._..... d receiving stream protected from erosion 7 (10-year storm)? _ Is there an overflow or bypass fo - - -- — - r inflow volume in excess of the 8 design volume? 91 What is the method for dewatering the SCM for maintenance? 10 If applicable, will the SCM be ed cleanout after construction? _ 11 Does the maintenance access comply with General MDC (8)? ._ 12 Does the drainage easement comply with General MDC (9)7 W - If the SCM is on a single family lot, does (wil17) the plat comply with 13IGeneral MDC (10)? -- ---_- _ _ - 141Is there an O&M Agreement that complies with General MDC (11)? 15 Is there an O&M Plan that complies with General MDC (12)? I6 Does the SCM_ follow thevice sp deecific MDC? _ _ I$ as the SCM designed by an NC licensed professional? fifes tl Yes 3.1 No Yes Yes Pump (preferred) Yes Yes Yes Yes Yes ' Yes Yes 18 Method used _I SAIDA 19 Has astage/storage labia been provided to the calculations? Yes Elevation of the excavated main pool depth (bottom of sediment 20 removal) (fmsl)^ -_-__ _ _ _ _ - -__ - 21.00__ 21 Elevation of the main pool bottom -(top of sediment removal) (final)- 22.00 22 Elevation of the bottom of the vegetated shelf (fmsl) _ _ 29.50 ?3 Elevation of the permanent pool (fmsl) - _ _ 30.00 24 1 Elevation of the top of the vegetated shelf (fmsl) _ _ 30.50I 251 Elevation of the temporary pool (fmsi) 33.00 26 Surface area of the main permanent pool (square feet)_ _ 1 21783:1 s 27 Volume of the main permanent pool (cubic feet) _ 131434 cf 28JAverage depth of the main pool (feet) _- _ 6.04 ft 29iAverage depth equation used _ Equation 2 301_ If using equation 3, mein peal perimeter (feet) - 31 j If using equation 3, width of submerged veg. shelf (feet)-__ 32iVolume of the forebay (cubic feet) _ 20372 cf 331Is this 15-20% of the volume in the main pool? _ Yes i4IClean-3ut depth for forebay (inches) --- - _ 12 in 33,51Design volume of SCM (cu ft) - _ - 92810 cf- 36j Is the outlet an orifice or a weir? 171If orifice, orifice diameter (inches) 38 �_If weir, weir height (inches) 391 If weir, weir length (inches) _ _ 10I Drawdown time for the temporary pool (days) Are the inlet(s) and outlet located in a manner that avoids short- 31 circuiting? _ Yes _. J >2 Are berms or baffles provided to improve the flow path? - - _ No 13 j Depth of forebay at entrance (inches) _ _--T 108 in - 14 Depth of forebay at exit (inches) 96 in i5 Does water how -out -of the forebay in a non -erosive manner? Yes @ I6 I Width of the vegetated shelf (feet) 6 ft t7l Slope of vegetated shelf (H:V) 6-1 E i Does the office drawdown from below the top surface of the 38 permanent pool? - Yes Does the pond minimize impacts to the receiving channel from the 1- f9 yr, 24-hr storm? _ Yes IAre fountains proposed? (If Y, please provide documentation that - i_OMDC(9) is met.) i No i_ 51 I Is a trash rack or other device provided to protect the outlet system? I Yes i2lAre the dam and embankment planted in non -clumping turf grass? -I Yes _ 531Species of turf that will be used on the dam and embankment -I Centipede Sod - --- -- - 54jHas a — planting plan been prov-3ed for the vegetated s— helf? Yes f: ITIONAL INFORMATION i Please use this space to provide any additional Information about the (; 55 wet pond(s)� _ original SIA and other materials from McKim & Creed for more information regarding SCM In. Permit No. (to be provided by DWQ) of wn rFA ��i� � OG �.� * STORMWATER MANAGEMENT PERMIT APPLICATION FORM WDENR 401 CERTIFICATION APPLICATION FORM PERMEABLE PAVEMENT SUPPLEMENT This form must be completely filled out, pnnte4 and ci hm;geYr The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with a# of the required information. II. PROJECT INFORMATION Project Name UNC Wilmington - The Hub Contact Person Cory George, PE, PLS Phone Number 919,361-5000 Date 2/8/2016 Drainage area SWMF II. DESIGN INFORMATION Soils Report Summary Hydrologic soil group (HSG) of subgrade A Infiltration rate 8.32 in/hr Pavement Design Summary BUA Credit for Permeable Pavement Footprint: Permeable Pavement (PP) design type Infiltration - HSG A/B 75% BUA Credit SA of PP being proposed (Ap) 8,518 ft2 Resulting BUA counted as impervious for main application form 2,130 ft2 Adjacent BUA directed to PP (AJ 8,494 ftz OK Ratio of A, to Ap 1.00 (unitless) Flow from pervious surfaces is directed away from PP? Yes OK Design rainfall depth 1.5" in Permeable pavement surface course type PICP Layer 1- Washed aggregate size (ex. No. 57) #8 Layer 1- Aggregate porosity (n) 0.40 (unitless) OK Layer 2 - Washed aggregate size (ex No. 57) #57 Layer 2 - Aggregate porosity (n) 0.40 (unitless) OK Minimum total aggregate depth for design rainfall (D..) 7.5 in Drawdown/infiltration time for 0,,,q 0.0 days OK How is 10-yr, 24-hr storm handled? bypassed Underdrain Required Aggregate depth to infiltrate 10-yr, 24-hr storm (Dip) 36.5 in Drawdown/infiltration time of 10-yr, 24-hr storm 0.37 days Actual provided total aggregate depth 7.5 in OK Top of aggregate base layer elevation Varies fmsl Storage elevation of design rainfall depth 42.48 fmsl Overflow elevation 42.48 fmsl Bottom elevation at subgrade 41.85 fmsl #REFI SHWT elevation 39.75 fmsl Underdrain diameter 6 in ``,tllllllf?t�� �N CARO O oEss�o'e�ti': 2 1 E ECaE11/ CIWE� . FEB 0 9 2016 ''�� Nrcoa^� G�,•�` BY: Z_9.2o1v Form SW401-Permeable Pavement-Rev.4-October 16, 2012 PP Supplement Form, Page 1 of 3 Permit No. (to be provided by DWO) Detention Systems (skip for infiltration systems) Diameter of orifice in Coefficient of discharge (Co) (unitless) Driving head (HO) ft Storage volume discharge rate (through discharge orifice) ft3/sec Storage volume drawdown time days Pre -development 1-yr, 24-hr peak flow ft3/sec Post -development 1-yr, 24-hr peak flow ft3/sec Additional Information Slope of soil subgrade at bottom of permeable pavement 0.25 % OK Slope of the permeable pavement surface 2.50 % OK Construction sequence minimizes compaction to soils? Yes OK Subsoil preparation specified (must select one) scariffied Meets industry standards for structural requirements? Yes OK Washed stone is specified for the aggregate? Yes OK Required signage specified on plans? Yes OK Number of observation wells provided 1 OK Distance to structure 88.00 ft Distance to surface waters >50 ft OK Distance to water supply well(s) >100 ft OK ECEIVE R, FEB 0 9 20% U BY: Form SW401-Permeable Pavement-Rev.4-October 16, 2012 PP Supplement Form, Page 2 of 3 Permit No. (to be provided by DWG) 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 applice, d has designated an agent, the agent may initial beluw. if a requirement has noi: been met, attach justification. 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), - Location of permeable pavement, - Roof and other surface flow directed away from permeable pavement, - Location of the permeable pavement sign(s). 2. Section view of the permeable pavement (1" = 20' or larger) showing: - All layers (including details about the surface course), and - SHWT 3. A detail of what the permeable pavement sign. 4. A site specific soils report that is based upon an actual field investigation, soil borings, and infiltration tests within the footprint of the proposed permeable pavement. The soils investigation shall state the infiltation rate, SHWT elevation, and information about any confining layers. County soil maps are not an acceptable source of soils information. (Projects in the WiRO - The results of the soils report must be verified in the field by DWO, by completing & submitting the soils investigation request form.) 5. A construction sequence that shows how the permeable pavement will be protected from sediment until the entire drainage area is stabilized. 6. The supporting calculations. 7. A copy of the signed and notarized operation and maintenance (0&M) agreement. 8. A copy of the deed restrictions (if required). Initials I Pagel Plan Sheet No. ECEIVED FEB 0 9 2016 8Y• Form SW401-Permeable Pavement-Rev.4-October 16, 2012 PP Supplement Form, Page 3 of 3 Permit Number: (to be provided by DWQ) Drainage Area / Lot Number: Permeable Pavement Operation and Maintenance Agreement I will keep a mainle3tance record on this Bivii . 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. At all times, the pavement shall be kept free of: — Debris and particulate matter through frequent blowing that removes such debris, particularly during the fall and spring. — Piles of soil, sand, mulch, building materials or other materials that could deposit particulates on the pavement. — Piles of snow and ice. — Chemicals of all kinds, including deicers. J NN 14 201a The permeable pavement will be inspected once a quarter. Records of oration an_ d _ maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: The perimeter of the permeable pavement The surface of the permeable pavement Potential problem: Areas of bare soil and/or erosive gullies A vegetated area drains toward the pavement. Trash/debris present Weeds Sediment Rutting, cracking or slumping or damaged structure Observation well Water present more than five days after a storm event Educational sign Missing or is damaged. Form SW401-Permeable Pavement O&M-Rev.4 10/03/2012 How to remediate the problem: Regrade the soil if necessary to remove the gully, then plant ground cover and water until established. Regrade the area so that it drains away from the pavement, then plant eround cover and water until established. Remove the trash/debris. Do not pull the weeds (may pull out media as well). Spray them with a systemic herbicide such as glyphosate and then return within the week to remove them by hand. (Another option is to pour boiling water on them or steam them.) Vacuum sweep the pavement. Consult an appropriate professional. Clean out clogged underdrain pipes. Consult an appropriate professional for clogged soil subgrade. Replace the sign. Page 1 of 2 Permit Number: (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 %ecnnn.. l c,le i....Y,....� . Project name:UNC Wilmington - The Hub BMP drainage area or lot number: I Print name:Mark D. Morgan Title:Interim Associate Vice Chancellor for Business Affairs - Facilities Address:601 S. College Road, Wilmington NC 28403 Phone:(910) 962 - 3761 Signature: Date: .�•.,.... �� ��f� 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, V Chat! F. ltvamdr c- , a Notary Public for the State of "f`HR 01b�;,,►� , County of , do hereby certify that personally appeared before me this /I day of and acknowledge the due execution of the forgoing permeable pavement maintenance requirements. Witness my hand and official seal, z��i,: Notary Public Is '— N�w Nano 1y w, bounty Cofi 01881on ExplrN Z Q7/�2019 Z O r �: y����,/►�hiCIA 2 . My commission expires RECEIVE r, JAN 14 201i BY.. - Form SW401-Permeable Pavement O&M-Rev.4 10/03/2012 Page 2 of 2 Z7Ldtu The Hub at UNC Wilmington - Stormwater Permit No. SW8 160103 Designer's Certification f , ,� 1,0-t5 ( % 1 as a duly registered �1'v �rysa in the State of North Carolina, having authorized to observe is iwakly/ full time) the construction of the project, 0 (Projeci) for roleot Owner) hereby state that, to the beat of my abilities, due' re 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 approvied plans and specification: err Signature Registration Number Date Page 7 of 8 Mate Certification Requirements: �1 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, - 1. All the Duitt-upor, , area associatP4 with the project is graded such that the turloff drat in # to the `dsy".tefn. *1 7 pfra QIM . All roof drains are located such that the runoff is directed into the system. QA 5. The bypass structure weir elevation is per the approved plan. ti 6 The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the bypass structure. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3,11, fig. The inlets are located per the approved plans and do not cause short-circuiting of the system. t�_'l 1. The permitted amounts of surface area andfor volume have been provided. 92. All required design depths are provided. All required parts of the system are provided. '!4. The required system dimensions are provided per the approved plans. cc: NCDEQ-DEMLR Wilmington Regional Office New Hanover County Building Inspections Page 8 of 8 State Stomliwater Management Systems Permit No. SW8 021011 Parking Lot "L" Stormwater Permit No. SWS 021011 New Hanover County Designer's Certification 1"r-VVY as a duly registered hra1Aed6; oA-a—t in the State of North Carolina, h ing been authorized to observe (periodically/* the construction of the project, (Project) for /r*xi AA 54-!t_(Prcject Owner) hereby state that, to the best of my abilities, due care and dilib ce 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 l4k • A 4:: C� Registration Number /9 Date S /d? &Y got d &-, �o dI-1 SEAL Cq;?' VSZO SEAL 19742 N. 7 State Ston.. water Management Systems Permit No. SW8 021011 Certification Requirements: MNN 1. The drainage area to the system contains approximately the permitted acreage. /hNN 2. The drainage area to the system contains no more than the permitted amount of built -upon area. M#J6 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. IAN�_4. The outlet/bypass structure elevations are per the approved plan. �Y► 5. The outlet structure is located per the approved plans. ,p Q 6. Trash rack is provided on the outlet/bypass structure. 7. All slopes are grassed with permanent vegetation. /�/L8. Vegetated slopes are no steeper than 3:1. p1 —9. The inlets are located per the approved plans and do not cause short-circuiting of the system. /JINi1' 10. The permitted amounts of surface area and/or volume have been provided. /11 11. Required drawdown devices are correctly sized per the approved plans. AM 12. All required design depths are provided. /d*-13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. AJVP 14. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DWQ Regional Office Tony Roberts, New Hanover County Building Inspections State Story__ .rater Management Systems Permit No. SW8 021017 UNCW Surface Parking Lot "O" Stormwater Permit. No. SW8 021017 New Hanover County Designer`s Certification h Ifidt /) • &N (`w't , as a duly registered _,Pro�'�s(oAA-e tP4 a-e{v in the State of North Carolina, aving been authorized to observe (periodically/Wzjd ,, /JaUtAiM) the construction of the project, is (Project) for 0A Ink .1 N (Project Owner) hereby state that, to the best of my abilities, due care and dAigence 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: SEAL Signature __A4=A AMI��,q Registration Number / 7 yap, 0CA Date Date SEAL 19742 rc Vd (P-04 -U �' 40-"� 7 State Stoi___,vater Management Systems Permit No. SW8 021017 Certification Requirements: A A* I. The drainage area to the system contains approximately the permitted acreage. rnt* 2. The drainage area to the system contains no more than the permitted amount of built -upon area. MA_3. All the built -upon area associated with the project is graded such that the runoff drains to the system. hrI4. The outlet/bypass structure elevations are per the approved plan. AIV 5. The outlet structure is located per the approved plans. 1kr4 6. Trash rack is provided on the outlet/bypass structure. ANii- 7. All slopes are grassed with permanent vegetation. 14rix 8. Vegetated slopes are no steeper than 3:1. 9. The inlets are located per the approved plans and do not cause short-circuiting of the system. i 10. The permitted amounts of surface area and/or volume have been provided. 11. Required drawdown devices are correctly sized per the approved plans. /40# 12. All required design depths are provided. twwW 13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. r%W* 14. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DWQ Regional Office Tony, Roberts; New Hanover County Building Inspections