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HomeMy WebLinkAboutSW7021107_HISTORICAL FILE_20030227STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PER MIT NO. DOC TYPE CURRENT PERMIT APPROVED PLANS HISTORICAL FILE COMPLIANCE EVALUATI ON INSPECTION DOC DATE YYYYMMDD O� W A Michael F. Easley, Governor Willem G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Corn 1 ��7 > --i - Alan W. Klimek, P.E., Director ".4iPmor -IC Dmsion of Water Quality DIVISION OF WATER QUALITY February 27, 2003 Mr. Daniel F. Scanlon, II Currituck County PO Box 39 Currituck, NC 27929 Subj ect: Permit No. SW7021107 Maple Industrial Complex High Density Stormwater Project Currituck County Dear Mr. Scanlon: The Washington Regional Office received a completed Stormwater Application for the subject project on February 24, 2003. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7021107 dated February 27, 2003 to County of Currituck for the construction and operation of grass swales and two wet detention ponds to serve Maple Industrial Complex located at the Maple Airport in Currituck County. This permit shall be effective from the date of issuance until February 27, 2013 and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. 943 Washington Square Mail Washington, N.C. 27889 Telephone (252) 946-6481 FAX (252) 946-9215 Daniel Scanlon February 27, 2003 Page Two If you have any questions, or need additional information concerning this matter, please contact Roger Thorpe at (252) 946- 6481, extension 214. Sincerely, A"�" le- /-Vjlm ulligan Water Quality Regional Supervisor Washington Regional Office cc: Quible & Associates Currituck County Inspections Washington Regional Office Central Files State Stormwater Management Systems Permit No. SW7021107 STATE OF NORTH CAROLINA DEPARTI�ENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEI-ENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO County of Currituck FOR THE construction, operation and maintenance of stormwater management systems in compliance with the provisions of 15A NCAC 2H.1000 (hereafter referred to as the "stormwater -rules") and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved- by the Division of Water Quality and considered a part of this permit for grass swales and two wet detention ponds to serve Maple Industrial Complex located at the Maple Airport in Currituck County. This permit shall be effective from the date of issuance until February 27, 2013 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described on page 2 of this permit, the Project Data Sheet. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. DIVISION OF WATER QUALITY PROJECT DATA Project Name: Maple Industrial Complex Permit Number: SW7021107 Location: Currituck County Applicant: County of Currituck Mailing Address: PO Box 39 Currituck, NC 27929 Application Date: 11/12/2002 (original) Receiving Stream: UT North River Classification of Water Body: C - Swp Site Area: Total Impervious: Pond Depth: Required Storage Volume Provided Storage Volume: Required Surface Area Provided Surface Area: 167 ac 79.4 ac 3.0 ft 331,607 cf 384,298 cf 385,550 sf 549,890 sf Controlling Orifice: 1.5 ft weir @ elev 8.6 ft I 4. No homeowner/lot owner/developer shall be allowed to fill in, alter, or pipe any vegetative practices (such as swales) shown on the approved plans as part of the stormwater management system without submitting a revision to the permit and receiving approval from the Division. 5. The following items will require a modification to the permit: a. Any revision to the approved plans, regardless of size b. Project name change C. Transfer of ownership d. Redesign or addition to the approved amount of built - upon area e. Further subdivision of the project area. In addition, the Director may determine that other revisions to the project should require a modification to the permit. 6. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. II. SCHEDULE OF COMPLIANCE 1. The permittee will comply with the following schedule for construction and maintenance of the stormwater management system. a. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surfaces except roads. b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 2. The facilities must be properly maintained and operated at all times. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency including, but not limited to: 0 I a. Semiannual scheduled inspections (every 6 months) b. Sediment removal C. Mowing and revegetation of side slopes d. Immediate repair of eroded areas e. Maintenance of side slopes in accordance with approved plans and specifications f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 6. Upon completion of construction and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Mail the Certification to the Washington Regional Office, 943 Washington Square Mall, Washington, North Carolina, 27889, attention Division of Water Quality. 7. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of five years from the date of the completion of construction. III. GENERAL CONDITIONS 1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6(a) to 143-215.6(c). 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. S. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. Permit issued this the 27 th day of February, 2003. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Alan W. Klimek, P.E. Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7021107 Maple Industrial Complex, Currituck County Stormwater Permit No. SW7021107 Designer's Certification I , , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, for (Proj ect) (Project Owner) hereby state that to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. Signature Registration Number Date Quible Quible & Associates, P.C. ENGINEERING . ENVOZONMENIAL SCIENCES - PLANNING SINCE 1959 February 20, 2003 Mr. Roger Thorpe NCDE & NR Division of Water Quality 943 Washington Square Mail Washington, North Carolina 27889 V, EZ 1) FEB 2 4 2003 DWQ-WA.RO Re: Stormwater Management Plan (High Density Application) Maple Industrial Complex Maple Airport, Currituck County, North Carolina P.O. Drcv� 87D Hav*, NC 27949 Phonci: 252-261 = Fox 252-261-1260 PRINCIPALS Soon C. Bovie, P.E. JoseM S. LaWw, C.E.P. Edwrdo J. VaIcUvaso, P.E. ASSOCOJES JOS90 J. AnW, RE. David S. Noff Dear Mr. Thorpe: As per our telephone conversation Tuesday afternoon, I have revised the storage calculations for the wet ponds at the above referenced project to include the drainage from the industrial park (80% impervious, 20% pervious). Attached, for your reference, please find revised calculations and a revised overflow structure detail which properly reflect the inclusion of the industrial park area within the pond drainage area. If you have any questions, or require any additional information, please do not hesitate to contact me at 9252) 261-3300. Sincerely, ible & Aslociates, P.C. �avil. Deel, P. BRICK COPING 1.5' WIDE DRAWOOM WEIR WITH TRASH RAI MAPLE INDUSTRIAL COMPLEX NOT TO SCALE 1-29-03 R z az REV. 2-20-03 FEB 2 4 2003 DWQ-WAR.O CARO kA 0 0*1% SEAL 025158 PLAN WITH COPING REMOVED 32-5/8- SQUARE FRAME (TOP GRATE EX. 18" CMP, /5�EIR INV. ELEV. 0 8. 5' 24" 8. CONFRETE BASE SECTION X-X 24" SQUARE GRATE FRAME & GRATE: CAPITOL FOUNDARY OF VIRGINIA, INC. CHBN-3A FRAME (4") + FLAT GRATE HEAVY 24" I IN V 7 ' 35' CONCRETE SECTION Y-Y OVERFLOW OUTLET BOX DETAIL MODIFIED INC DOT STD. 840.15 BRICK COPING WEIR INVERT ELEV. @ 8.6' 1 4".8"x16" SOLID BLOCK (TYPICAL) QUIBLE & ASSOCIATES, P.C. P.O. Drawer 870 KITTY HAWK, NC 27949 (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com A, joB OCY)57- 51i)M CALCULATED BY DA D - DATE /o / �' CHECKED BY DATE RdV- 2-219-0_3 W QUI BILE & ASSOCIATES, P.C. JOB om�7- .1 P.O. Drawer 870 SHEET NO. OF K17Y HAWK, NC 27949 CALCULATED BY- DATE (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com CHECKED BY DATE QUIBLE & ASSOCIATES, P.C. P.O. Drawer 870 KITTY HAWK, NC 27949 (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com joB Llno67- 5uJM e��e,5 SHEET NO. - OF CALCULATED BY DA 1) DATE CHECKED BY DATE .�,A[ F QUIBLE & ASSOCIATES, P.C. P.O. Drawer 870 KIM HAWK, NC 27949 (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com joD 0006 7 - '_� U) rr\ Co L �, SHEET NO, — 14- —OF CALCU�TED BY 0 /a F; — DATE CHECKED BY DATE P-1010- ') - 20 U93 QUIBLE & ASSOCIATES, P.C. P.O. Drawer 870 KlTrY HAWK, NC 27949 (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com JOB DQ()i57__ 15MI ccdz-,�, - CALCULATED BY fp A I'D - DATE I- 25��0_3 CHECKED SCALE DATE 1201 1.20-6-3 1 6 4 444 2�1 R-1 e I'd. V. 7� _5) 6 6'86 5� 1 1 T, e"', �1) 0 O&A L�o FEB 2 4 2003 f Eb�.,vl 1-31 6, 11"C' "PJ N-Cj, (�16WA e .45, kri.,, p NC,3 P Ao rc (2 0., 2 9, (F1 Esc I PA N 10/1 e_. p&. Ml� k, 1:7 40drr)C.;��d� 0 F, co;-; 10cil"i, (lev, (��c 01141 (-al 21 6) ��rcp Ao _0,8, 4.. Hole_,� 7 4 oi. S_ ;613, 7.3,:7...C.2)_ �0_ �15 ii=._.o.,:_j..1. 0. QUIBLE & ASSOCIATES, P.C. P.O. Drawer 870 KITTY HAWK, NC 27949 (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com JOB (�oo57-6077) rolr-'- SHEET NO. OF CALCU�TED BY L) A D — DATE / - o2 5p- 03 CHECKED QUIBLE & ASSOCIATES, P.C. P.O. Drawer 870 KITTY HAWK, NC 27949 (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com JOB 000-") 7- �SWPI L"Ie". - �?evi SHEETNO.— OF CALCU�TED BY DATE / -.2 CHECKED By DATE QUIBLE & ASSOCIATES, P.C. P.O. Drawer 870 KITTY HAWK, NC 27949 (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com "I (1no;3 7 - -f it^;% SHEET NO. OF CALCULATED BY DA D - DATE / -,-2 9 - 0, :? INIMM.440MA SCALE . ............. . .......... ... ... .. ... .. ..... .... . .. . ... .. .. LW ... ... .. .. a/. I FEB 2 412 003 .. . . ... . ..... M.YCANAR0 ... ........ . .... A s) 19 . .. .. .. . .. ... ........ Ilk, oi .. . ....... ....... . . .......... . .... ..... j ............. ............. ........... . ....... . ... ............ ... .... .... . . ... .. ... .......... . . . ... .. .. . i 4, .... .. .... ............. ...... . ... .. .. ... - ... . ...... .................. .. _)4; Sj 9 �F.- . . ..... 1k:z-0, 06.6 ...... . .. . ...... . Hz L�),,. 4: 55- 41PZ, 7 7.6 . ... ... . . .... . . ...... . . . .... .... .. ........ ,OB (-)oo.-S 7- j Wp, i < �^._ QUIBLE & ASSOCIATES, P.C. 171, P.O. Drawer 870 SHEET NO. C/ OF KIM HAWK, NC 27949 CALCULATEDBY DATE (252) 261-3300 Fax (252) 261-1260 e-mail: quible@mindspring.com CHECKED BY DATE SCALE 0 7 ...... . ...... U iD ... ..... .. ci of X o''.0 3- �.IJ ...... ............... A9 �FE8 2 4 2003 30 - ....... ......... .... ........... . ... ...... . .. . ...... 61 h . :0, 3 0. Lo-1. 7 6, c P'._,,,. ........... 3 b 4,� �tl� Or,, wAv.. 3/h;07.44;�-� dt I k.; 0, 0. 1. i... ....... . .. ........... �a, �2. 0, 0.1�) ... . ............ .......... ... .... . .... U. 161 . .... ....... ... .... .. . .... 41 .. ... ..... .. ....... ...... ......... . ....... ...... . . . . ... .. .. .. . ..... ..... . . .. ... . .. . .... . . .... ..... . Stormwater Management Plan Narrative Maple Industrial Complex November 7. 2002 General The following narrative will detail the proposed stormwater management plan for the proposed Maple Industrial Complex and Airport Expansion. The Maple Industrial Complex is located on County -owned lands to the cast of the Currituck Maple Airport (at the end of SR 1379, approx. 8/10 ofa mile north of the intersection of SR 1379 and U.S. 158). As per state regulations, a high density permit will be pursued and will encompass existing and future construction up to complete build -out of the development. The proposed development will consist of development of a portion of the County -owned lands to the east of the present-day airplane hangars as an industrial park and county facilities. An addition to the airport facilities consisting of a new tertninal, associated parking, and additional airplane parking / loading area will also be part of the total development proposed within the project are —a/ drainage -area. The land proposed to be developed is centrally located within the county owned -lands and is generally bordered to.the north, east, and south by undeveloped lands. To the west, the project is bounded by the Currituck Maple Airport Airstrip -and SR 1246 (Maple Road). The proposed stormwater management method will consist of-a'wet pond (existing, man-made) with adequate storage capacity and sizing to provide stornowater management for the runoff generated by a one -inch storm across the fully devclopc2`site.at complete build -out. The following narrative will summarize the parameters of this design which will illustrate an eff&ctive stormwater management system. -1 Summary of Existing Conditions The project area consists of a sub -area of County owned lands at Currituck Maple Airport. The project area is contained completely within the drainage area, and so for the purposes of this analysis,.the project area is considerd to be the drainage area. The property is currently partially developed as an airport with airstrip, hangars, airplane parking / staging area, a small amount of parking, access road, County park, and County fueling area. There are also existing gravel drives accessing the areas of the property which are to be developed in the future as an industrial park. Existing stormwater management consists of gassed swale conveyance of runoff to two interconnected wet detention basins (which are grossly oversized for the current runoff received). Summary of Proposed Conditions An analysis of the existing wet detention basins show that they are of adequate size and capacity to provide stormwater management for the project area at complete project build -out (80% coverage within industrial park and 40% coverage within county facilities and airport). Project conditions allow conveyance of runoff via open grassed swales, and so the proposed stormwater management method is in -line with the existing method; open grassed swale conveyance to wet detention basins. Runoff from all newly developed areas will be conveyed into the northernmost basin, providing a forebay - mainbay basin layout. Stormwater Collection, Treatment, Storage and Disposal Collection The stormwater runoff will be collected and directed via site grading, and then conveyed via a network of open grassed swales to the existing we( detention basin (forebay basin). Stormwater piping is restrained to the bare minimum required to convey flows under roads and travel aisles. Treatment Runoff from paved areas will sheet flow to the pavement edge where it is directed via site grading to grassed swales. Long runs of grassed swales will deliver runoff from outlying portions of the drainage area and substantial treatment and disposal will occur in these swales as runoff is being conveyed. Large particulates and debris will accumulate along the road shoulder and at discharge points into the swale system. The swales will be grassed according to the general seeding specifications and maintained according to the operation and maintenance plan. The runoff will undergo filtration of fine particulates and pollutants by the vegetation within the swales. Additional treatment is also available when the stormwater runoff infiltrates into the subsurface. When the water passes through the void spaces between the particles of soil material particulates and pollutants that have a particle or grain size larger than the void size will be filtered out. In addition some pollutants will adsorb to the surface of the soil particles. The benefit of this adsorption will prevent the pollutants from reaching the water table and in some nutrient and microbe rich areas existing within the subsurface the pollutants will be consumed as food and undergo a natural biodegradation. The wet pond system will temporarily store stormwater above permanent pond. The season high water table will be considered the upper limit of the permanent pool. The storage provided by this system will exist from the permanent pool elevation to the top of the temporary pool elevation. When stormwater runoff begins to accumulate above the permanent pool elevation the pond level will increase and the existing vegetation on the side walls of the temporary pool will provide further filtration of pollutants and nutrient uptake. The extended duration time within the forebay will allow for particulate matter to settle to the bottom. In addition the entire pond will offer an extensive storage time allowing for maximum settling. The surface area to drainage area (SAMA) calculations reflecting the 90% TSS removal have been enclosed and can be found within the calculations section of the appendix. The wet pond as a stormwater management plan method will offer many excellent opportunities for stormwater treatment. S to ragg The proposed stormwater wet detention basin will provide storage of the 1 inch design storm in temporary storage above the permanent pool elevation. The storage available in the wet detention basin is measured from the permanent pool elevation of 8.4'MSL to the overflow weir elevation of 8.85' MSL (0.45' storage depth). As shown in the stormwater calculations (see Appendix), the overall drainage area to the wet detention basin consists of 167 acres (7,274,329 sf). The design storm of I " of rainfall, collected for this entire drainage area, results in a required storage of 246,900 cf and the wet detention basin, as designed, provides for this temporary storage. It should be noted that the temporary storage required for a I " rainfall event does not take into account the amount of runoff which will infiltrate into the subsurface within the long -run swales prior to discharge into the wet detention basins, and therefore, the storage provided will probably substantially exceed what is required for containment of the first inch of runoff. DiWosal As discussed in previous sections the majority of stormwater runoff entering this management system will be infiltrated, therefore infiltration will be the primary source of disposal. At such time that the capacity were to be exceeded the system will then overflow into the adjacent drainage swale via an overflow structure. Soils Quible & Associates visited the site to perform on -site soil borings to verify soil type and determine elevation of' mean high groundwater. Seasonal high groundwater indicators within the existing pond were found at an elevation of +/- 8.4 feet. Information collected on site indicates that the soils found throughout this site are composed primarily of fine loamy sands. These moderately well drained soil types will have a moderate to moderately rapid permeability, These findings generally correlate with the description mapped and discussed in the United States Department of Agriculture, Soil Conservation Service, Soil Survey of Dare County, North Carolina, which map the soil for this site as follows: CnA - Conetoe loamy sand, Permeability is moderately rapid. Mu - Mundcn loamy sand, Permeability is moderate. Pt - Portsmouth fine sandy loam, Permeability is moderate. Ds - Dragston loamy fine sand, Permeability is moderately rapid. AaA - Altavista fine sandy loam, Permeability is moderate. StA - State fine sandy loam, Permeability is moderate. Infiltration rates typical for these soils are generally in the range of 2-6 in/hr. A photocopied soils map with site location has been included within this narrative. Calculations A set of sample calculations can be found within appendix portion of this narrative, Conclusions The proposed stormwater management plan for this site will handle the prescribed I inch of stormwater runoff generated by all surfaces, pervious and impervious (up to complete build -out of the drainage area) located on this site by making use of two existing wet ponds an conjunction with long -run vegetated infiltration swales. 'Me proposed system will offer preliminary, primary and secondary methods of treatment as well as an alternate method of disposal should the capacity be exceeded. The soils on site generally have infiltration rates in the range of2 to 6 inches per hour, conditions adequate for an infiltration system. This proposed design will more than adequately serve the stormwater management requirements of this site. Quible Quible & Associates, P.C. ENGINEERING - ENVIRONMENTAL SCIENCES - PLANNING SINCE 1959 November 7, 2002 Mr. Bill Moore NCDE & NR Division of Water Quality 943 Washington Square Mall Washington, North Carolina 27889 Re: Stormwater Management Plan (High Density Application) Maple Industrial Complex Maple Airport, Currituck County, North Carolina Dear Mr. Moore: P.O. D� 870 HCrA. NC 27949 Ph�: 252-261-3300 Fax 252-261-1260 PRINCIPALS Saan C. Boy$i P.E. Joseo S. LwWw, CEA Eduardo J. Voldveso, P.E. NOV 12 2002 DWQ-WARO ASSOCIATES JOSDph J. Anand, P.E. David S. Neff On Behalf of Currituck County, Quible & Associates, P.C. hereby submit for review and approval a North Carolina Division Of Water Quality, Stormwater Management Permit Application package for the proposed Maple Industrial Complex to be located on county owned lands adjacent to the Maple Airport. The Maple Industrial Complex will consist of 23 lots available for industrial development along with build -out of surrounding lands with county facilities and the expanded Maple Airport. The project (at full build -out) falls within the high density classification and the stormwater management plan consists of long -run grassy infiltration swales utilized in conjunction with two large wet detention basins. The enclosed narrative will explain in detail the stormwater management of this site. A clearer vision of the existing site, existing wet detention basins, and future development may be ascertained through a site visit, and we would be happy to meet you on -site if you were able to make such a visit. The following items are included and shall be considered part of this submittal package: 0 1 . Review Fee Check for $420.00 -�/ 0 2. Two (2) Copies of the Stormwater Management Permit Application Form, including One (1) Copy of the Wet Detention Basin Supplement Application Form 0 3. One (1) Copy of the Stormwater Management Plan Narrative 4. Calculations and Supporting Data (Stormwater Management Plan Narrative Appendix) 0 5. Two (2) sets of Plans (Sheets CO, C 1. 1, C2, C3, C5, & C6) Please contact me with any questions or requests for additional information at (252)261-3300. Sincerely, 4 u"le 'sociates, P.C. David eeAl, 4P cc: Mr. Daniel F. Scanlon, Currituck CountY REGEOVED FINANCIAL RESPONS1131LITYIOWNERSHIP FORM MAR 1.7 2008 SEDIMENTATION POLLUTION CONTROL ACT DVV9-WARO No person may initiate any land -disturbing activity on one or more acres as covered by the Act efore this form and an acceptable erosion and sedimentation control plan have been completed and approved by the Land Quality Section, N.C. Department of Environment and Natural Resources. (Please type or print and, if the question is not applicable or the e-mail and/or fax information unavailable, place N/A in the blank.) Part A. Project Name___ Corporate Hanclar and Hanoar Taxiwa 2. Location of land -disturbing activity: County—_!Qurrituck City or Township Maple Highway/Street Airport Roa . d Latitude 36023'56"—Longitude-76LOU �58" 3. Approximate date land -disturbing activity will commence: Mal 2008 4 . . Purpose of development (residential, commercial, industrial, institutional, etc.): Airport 5. Total acreage disturbed or uncovered (including off -site borrow and waste areas): 1.7 6. Amount of fee enclosed: $ 130 . The application fee of $65.00 per acre (rounded up to the next acre) is assessed without a ceiling amount (Example: a 9-acre application fee is $585). 7. Has an erosion and sediment control plan been filed? Yes— X No— Enclosed X 8. Person to contact should erosion and sediment control issues arise during land -disturbing activity: Name John Massey E-mail Address imasseyetblilm.com Telephone 910-763-5350 Cell ft 910-520-6100 Fax # 91-762-6281 9. Landowner(s) of Record (attach accompanied page to list additional owners): Currituck County (252) 232-6035 (252) 232-3298 Name Telephone Fax Number PO Box 38 153 Courthouse Road Current Mailing Address Current Street Address Currituck NC 27929 Currituck NC 27929 City State Zip City State Zip 10. Deed Book No. 75 Page No. 0807 Provide a copy of the most current clead. Part B. I _�_ 1. Person(s) or firm(s) who are financially responsible for the land -disturbing activity (Provide a comprehensive list of all responsible parties on an attached sheet): Currituck Couoly Name E-mail Address PO Box 39 153 Courthouse Road Current Mailing Address Current Street Address Currituck NC 27929 Currituck NC 27929 City State Zip City State Zip Telephone (252) 232-2075 Fax Number (252) 232-3551 .!Af- 2. (a) If the Financially Responsible Party is not a resident of North Carolina, give name and street address of . the designated North Carolina Agent: Name Current Mailing Address city State Zip Telephone E-mail Address Current Street Address City State Zip Fax Number (b) If the Financially Responsible Party is a Partnership or other person engaging in business under an assumed name, attach a copy of the Certificate of Assumed Name. If the Financially Responsible Party is a Corporation, give name and street address of the Registered Agent: Name of Registered Agent E-mail Address Current Mailing Address Current Street Address city Telephone State Zip city State Zip Fax Number The above information is true and correct to the best of my knowledge and belief and was provided by me under oath (This form must be signed by the Financially Responsible Person if an individual or his afforney-in-fact, or if not an individual, by an officer, director, partner, or registered agent with the authority to execurte instruments for the Financially Responsible Person). I agree to provide corrected information should there be any change in the information provided herein. Eric Weatheriv Type or print name (� 2 Signature County Engineer Title or Authority -3 I -WI 01 Date 1,-IN-MrO�A ��- QT\a\JE a Notary Publicof theCounty of C,,jrri+ucL State of North Carolina, hereby certify that Erir_ �"-e appeared personally before me this day and being duly sworn acknowledged th�t the aboveltionnn was executed by him. Witness my hand and notarial seal, this-1 1A11 day of �AOX C,'Y--N —, 20 0'� Notary U MAW "Way ftft My commission expires a L) 0 CUFOUCk Cou* ftft ot mom cowft IM71111don Apr$. 2010 rl�� OFFICE USE ONLY eived Fee Paid Permit Number 12007 ')t �i to m 2!La!� '�MQA 1 6 wAcY- DWQ-WARO State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original L GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): County of Currituck 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Mr. Daniel F. Scanlon, 11 3. Mailing Address for person listed in item 2 above: III-Tonkm Currituck Telephone Number: 252 ) 232-2075 State: NC Zip: 27929 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Bittiminous Apron Expansion 5. Location of Project (street address): Currituck Regional Airport (Intersection of SR 1379 and US 158) City: Maple County: Currituck 6. Directions to. project (from nearest major intersection): Project is located at the end of SR 1379, Approximately 8/10 of a mile north of the intersection of SR 1379 and US 158. 7. Latitude: 760 00' 55" 360 23'59" 8. Contact person who can answer questions about the project: of project Name: Mr. John Massey, P.E. Telephone Number: ( 910 763-5350 11. PERMIT INFORMATION: 1. Specify whether project is (check one): —New Renewal X Modification Form SWU-101 Version 3.99 Page I of 4 2. If this application is being submitted as the result ofa renewal or modification to an existing permit, list the existing permit number SW 7021107 and its issue date (if known) 2/27/03 3. Specify the type of project (check one): Low Density X High Density —Reclevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): —CAMA Major X sedimentation/Erosion Control 404/401 Permit _NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. Ill. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing storrinvater management for the project . Stormwater runoff will be conveved via wassed drainage swales and storm drain pipe to an existing wet detention basin origbally permitted under SW Permit SW7021107. 2. Stormwater runoff from this project drains to the Pasquotank River basin 3. Total Project Area: 167 acres 4. Project Built Upon Area: 10.2 % (Post Construction) 5. How many drainage areas does the project have? 1 *47.5% (Ultimate included in permit SW 7021107) 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Airport Subarea Basin Information Drainage Area I ----- Draimgc-Arrea-2---- Receiving Stream Name UT North River Receiving Stream Class C - SWP Drainage Area 7,274,329 SF 1,785,960 SF Existing Impervious* Area 707.667 SF 396,351 SF Proposed Impervious*Area 38.350 SF 38,350 SF % Impervious* Area (total) 10.2% 24.3% Impervious* Surface Area Drainage Area I Drainage Area 2 On -site Buildings 33-914 SF On -site Streets 240.497 SF On -site Parking 44,084 SF On -site Sidewalks 10.502 SF Other on -site 417,021 SF Off -site Total: 746,018 SF Total: Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SWU- 101 Version 3.99 Page 2 of 4 7. How was the off -site impervious area listed above IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. 1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 2. No more than square feet of any lot shall be covered by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decking or the water surface of swimming pools. 3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to construction. 5. All permitted runoff from outparcels; or future development shall be directed into the permitted stonnivater control system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form (s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-.5083 for the status and availability of these forms. Form SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SVVU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form SVVU-109 Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of 4 VT. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Original and one copy of the Stormwater Management Permit Application Form One copy of the applicable Supplement Form(s) for each BMP Permit application processing fee of $420 (payable to NCDENR) Detailed narrative description of stormwater treatment/management Two copies of plans and specifications, including: - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VIL AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent (individual or firin); Mailing Address: Phone: ( Fax: VIII. APPLICANT'S CERTIFICATION 1, (print or type name ofperson listed in General Information, item 2) F. 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 15A NCAC 21-1.1000. Date: 4- Form SWU-101 Version 3.99 Page 4 of 4 TALBERT& BRIGHT May 3), 2007 1/1' Mr. Roger Thorpe NCDENR — Division of Water Quality 941 Washington Square Mall Washington, NC 27889 RF: CurritUck Re,,ional Airport 0 Bituminous Apron Expansion TBI No. 2201-0501 Dear Eric: MAY 0 4 2007 Doi Enclosed please find application materials for a Storrnwater Management Permit for the bituminous apron expansion at the CLErrituck Regional Airport. This permit application is a modification to the existing permit number SW7021107 issued February 27, 2003. The materials enclosed include two copies of the Storrnwater Management Permit Application Form (one original), one copy ofthe Wet Detention Basin Supplement submitted with the original permit SW7021107, check in the amount of $420.00, project narrative and two copies of Plans lor the project. If you have any questions, please do not hesitate to call. Sincerely, .110,11, M. Massey, I.E. Project Engineer C: Mr. Eric Weatherly ENGINEERING & PLANNING CONSULTANIS WWWTALBERTANDBRIGHTCOM 4810 SHELLEY DRIVE WILMINGTON, NC 29405 910.7615350 FAX 910.762.6281 WILMINUTON. NORTH CAROLINA - CHARLOrl I, NoRrii CAROLINA - RICHMOND, VIRGINIA RECEOVED Too UJq MAY 15 2007 Marc, LA FINANCIAL RESPONSIBILITY /OWNERSHIP FORM DWQ-WARO , SEDIMENTATION POLLUTION CONTROL ACT G-11TI67 No person may initiate a land -disturbing activity on one or more acres as covered by the Act before this form and an acceptable erosion and sedimentation control plan have been completed and approved by the Land Quality Section, NC Department of Environment, and Natural Resources. (Please type or print and, if question is not applicable, place N/ A in the blank). Part A. I . Project Name Currituck Regional Airport Apron Expansion 2. Location of land -disturbing activity: County Currituck City or Township Maple —, and Highway/Street Intersection of Airport Road & NC 158 3. Approximate date land -disturbing activity will be commenced: July, 2007 4. Purpose of development (residential, commercial, industrial, etc.): Airport (Apron Expmsion) 5. Total acreage disturbed or uncovered (including off -site borrow and waste areas): 6. Amount of fee enclosed $ 100.00 7. Has an erosion and sedimentation control plan been filed? Yes. X No — Enclosed X 8. Person to contact should sediment control issues arise during land -disturbing activity. Name Wayne Leary Telephone 252-453-2878 9. Landowner(s) of Record (Use bkmk page to list additional owners): Currituck County Name(s) Post Office Box 39 Current Mailing Address Currituck NC 27929 City State Zip 10. Recorded in Deed Book No. Part B. Current Street Address city State Page No. Person(s) or firm(s) who are financially responsible for this land -disturbing activity (Use a blank page to list additional persons or firms): Currituck Coun!X Name of Person(s) or Firm(s) Post Office Box 39 Current Mailing Address Currituck NC 27929 city State Zip Current Street Address MAY 5 2007 Telephone 252-232-2075 Telephone LAND QUALITY SECTION I V051 liN TON REGIONAL OFFICE I 2. (a) If the Financially Responsible Party is not a resident of North Carolina give name and street address of a North Carolina Agent. Name Mailing Address City State Zip Telephone Street Address City State Zip Telephone (b) If the Financially Responsible Party is a Partnership or other person engaging in business under an assumed name, attach a copy of the certificate of assumed name. If the Financially Responsible Party is a Corporation give name and street address of the Registered Agent. Name of Registered Agent Telephone Mailing Address Street Address State Zip city State Zip Telephone The above information is true and correct to the best of my knowledge and belief and was provided by me under oath. (nis form must be signed by the financially responsible person if an individual or his attorney - in -fact or if not an individual by an officer, director, partner, or registered agent with authority to execute instruments for the financially responsible person). I agree to provide corrected information should there be any change in the information provided herein. Daniel F. Scanlon, 11 Ty 0 nam S ure County Manager Title or Authority — 4- yR=Q-_j Date 1, MO_ Y'q bo rf� , a Notary Public of the County of 0 =1��deA-7 State of North Carolina, hereby cerfify that �1� Y? I eJ F_ 11a_4 L7, 77— appeared personally before me this day and being duly sworn acknowledged that the above form was executed by him. Witness my hand and notarial seal, this day of 4 Seal My commission expires Z��? DWQ USE ONLY Date Received Fee Paid Permit Number 11t ;�_008 1 V505 1 SV4-7o;l-Hq-7 (mot) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM Thisforni may be photocopiedfor use as an original 1. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): 2. Print Owner/ Signing Official's name and title (person legally responsible for facility and compliance): Mr. Eric Weatherly, County Engineer 3. Mailing Address for person listed in item 2 above: PO Box 38 City: Currituck State: NC Zip: 27929 Phone:( 252 ) 232-6035 Fax: ( 252 232-3298 Email:eweatherly@currituck.nc.us 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Maple Industrial Complex 5. Location of Project (street address): Currituck Regional Airport (Intersection of SR 1379 and US 158) City: Maple County: Currituck 6. Directions to project (from nearest major intersection): Proqect is located at the end of SR 1379, Approximately 8/10 of a mile north of the intersection of SR 1379 and 7. Latitude: 36 23'56" Longitude: 76 00'58" of project 8. Contact person who can answer questions about the project: Name: Mr. lohn Massey, P.E. — Telephone Number: ( 910 ) 763-5350 Email: imassey@tbiilm.com 11. PERMIT INFORMATION: 1. Specify whether project is (check one) ONew DRenewal ZModification Form SWU-101 Version 8.07 Page I of 4 OCAMA Major OSed imentation /Erosion Control E1404/401 Permit ZNPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. Ill. PROJECT INFORMATION 1. In the space provided below, summarize how storinwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Stormwater runoff will be conveyed via grassed draina e swales and storm drain pipe to an existing wet detention basin orininally permitted under SW Permit SW7021107. 2. Stormwater runoff from this project drains to the Ra.;qUotank River basin. 3. Total Site Area: 167 acres 4. Total Wetlands Area: 0 acres 5. 100'Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site) 6. Total Project Area**: 1.7 acres 7. Project Built Upon Area: 10.7 % 8. How many drainage areas does the project have? 1 9. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name UT North River Stream Class & Index No. C_SWP Airport Subarea Drainage Area (sf) 7,274,329 SF 1,785,960 SF Existing finpervious* Area (sf) 746,018 SF 434,701 SF v/ Proposed Impervious*Area (sf) 32,526 SF 32526 SF % Impervious* Area (total) 10.70% 26.2% Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (sf) 51,614 SF On -site Streets (sf) 240,497 SF On -site Parking (sf) 44,084 SF On -site Sidewalks (sf) 10,502 SF Other on -site (sO 431,847 SF r70 Total (sf): 778,544 SF Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sideWalks, gravel areas, etc. **Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. 10. How was the off -site impervious area listed above derived? See Attached exhibit. (Aerial Survey) IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. Form SWU-101 Version 8.07 Page 2 of 4 Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required in the above form, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SW401-Low Density Form SW401-Curb Outlet System Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-Infiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cell Form SW401-Level Spreader Form SW401-Wetland Form SW401-Crassed Swale Form SW401-Sand Filter Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bionetention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement Sand Filter Supplement Form SWU-101 Version 8.07 Page 3 of4 VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the interactive online map at hM://h2o.enr,state.nc,us1su/msi maps.htLn) 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials Original and one copy of the Storrowater Management Permit Application Form Original and one copy of the Deed Restrictions & Protective Covenants Form Original of the applicable Supplement Form(s) md O&M agreement(s) for eachB Permit application processing fee of $505 ($4,000 for Express) payablee to NCDENR Calculations & detailed narrative description of stormwater treatment/m em*ent Copy of any applicable soil report Three copies of plans and specifications (sealed, signed & dated), including: - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high water fine - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note an plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VIL AGENT ALT17HORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent (individual or Mailing Address: Zip: Phone: Fax: Emaik VIII. APPLICANrs CERTIFICATION I, (print or type name of person listed in General Information, item 2) Mr. Eric Wea "herl I certify that the information included on this pern-dt 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 15A NCAC 2H.1000. Signature: I <:�'_ ) L-1) _�� . Date: -? 1-7 )08 FormSVX-101 Version8.07 Page 4 of 4 z M 1M,1;,,'OFF10EUSE ONLY, Date Received Fee Paid Permit Number it 1 lz- 1 0 Z- 1 107 State of North Carolina Department of Envirorunent and Natural Resources Division of Water Quality RECEIVED STORMWATER MANAGEMENT PERMIT APPLICATIO )J , This for?n nuzy be photocopiedfor use as an original WTI 2002 1. GENERAL INFORMATION DWQ-WARO 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): County of Currituck I 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Mr. Daniel F. Scanlon, Il 3. Mailing Address for person listed in item 2 above: PO Box 39 r;�'- Currituck Telephone Number: 252 )232-2075 NC 27929 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Maple Industrial Complex 5. Location of Project (street address): Maple Airport (Intersection of SR 1379 & US 158 City:, County: Currituck 6. Directions to project (from nearest major intersection): Project is located at the end of SR 1379 approx. 8/10 of a mile north of the intersection of 1379 * US 1581 7. Latitude: 76001'08" Longitude: 36023'56" of project 8. Contact person who can answer questions about the project: Name: Mr. David A. Deel, PE — Telephone Number: ( 252 261-3300 Ii. PERMIT INFORMATION: 1. Specify whether project is (check one): XX New Renewal Modification Form SWU-101 Version 3.99 Page I of 4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issu.e date (if known) 3. Specify the type of project (check one): —Low Density X High Density —Reclevelop —General Permit Other 4. Additional Project Requirements (check applicable blanks): . _CAMA Ma'Jor X Sedimentation /Erosion Control _404/40lPermit _NPDESStormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1C�'� " I ... IVI ,87,7--62X6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Stormwater is collected from throughout the project site in grassed drainage swales and conveyed to a large wet detention basin located on the southern efidlof the draina2e area. 2. Stormwater runoff from this project drains to the Pasquotank 3. Total Project Area: 167 acres 5. How many drainage areas does the project have? River basin. 4. Project Built Upon Area: 9.73 % 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. h#O ]Rj� e� North River " 77 Receiving Stream Name Receiving Stream Class SC Drainage Area 7,274,329 sf Existing Impervious* Area 669,905 sf Impervious*Area 106,472 s % Impervious* Area (total) 707667 sf (9.73%) On -site Buildings '33,914 sf On -site Streets 240,497 9f On -site Parking 44,084 sf On -site Sidewalks 10,502 sT_ Other on -site 378,670 sf N/A Total: 707 667 sf i 4 Total: impermous area is depned as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SWU-101 Version 3.99 Page 2 of 4 How was the off -site impervious area listed above derived? IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. 1. Thefollowing covenants are intended to ensure ongoing compliance with state stormwater management permit number as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 2. No more than 80% squarefeet of any lot shall be covered by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decking or the water surface of swimming pools. 3. Swales shall not befilled in, piped, or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to construction. 5. All permitted runofffrom outparcels orfuture development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management pem-dt supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SVM-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of 4 VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. 1. Please indicate that you have provided the following required information byinitialing in the space provided next to each item. Original and one copy of the Stormwater Management Permit Application Form One copy of the applicable Supplement Form(s) for each BMP Permit application processing fee of $420 (payable to NCDENR) Detailed narrative description of stormwater treatment/ management Two copies of plans and specifications, inducling: - Development/Project name - Engineer and firm -Legend - North axTow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent (individual or firm): David A. Deel, PE/Quible & Associates, P.C. Mailing Address: PO Drawert870 City: Kitty Hawk State: NC zip: 27949 Phone:( 252 261-3300 Fax: ( 252 261-1260 V111. APPLICANTS CERTIFICATION I, (print or type name of person listed in General Information, item 2) Daniel F. Scanlon, 11 certify that the information included on this pennit 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 15A NCAC 2H.1000. Date:— xk-(�-n2_ Form SWU-101 Version 3.99 Page 4 of 4 Permit No. (to be provided bY DWQ) State of North Carolina Department of Envirorument and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT Thisform may be photocopiedfor use as an original DWO 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: Maple Industrial Complex Contact Person: David A. Deel, PE Phone Number: (252 ) 261-3300 For projects with multiple basins, specify which basin this worksheet applies to: N/A elevations Basin Bottom Elevation i5.4 ft. (floor of the basin) Permanent Pool Elevation ±8.4 ft. (elevation of the orifice) Temporary Pool Elevation 8.85 ft. (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 538,338 sq. ft. (water surface area at the orifice elevation) Drainage Area — 167 ac. (on -site and off -site drainage to the basin) Impervious Area 54.2 ac. (on -site and off -site drainage to the basin) —Tcoverage at complete buildout (see calcs.) volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Otherparameters SA/DAI Diameter of Orifice Design Rainfall Design TSS Removal 2 tl .615,014 cu. ft. (combined volume of main basin andforebay) 246,900 cu.ft. (volume detained above the permanent pool) ±630,876 cu. ft. (approximately 20% of total volume) 3.74 (surface area to drainage area ratiofrom DWQ tablr' N/A in. (2 to 5 day temporary pool draw -down required) 1 in. 90 % (minimum 85% required) Form SYATU-102 Rev 3.99 Page I of 4 Footnotes7 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 non- standard table entries. 2 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. 'Me NCDENR BN4P manual provides design tables for both 85% TSS removal and 90% TSS removal. 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. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is 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 justiflcation. Applicants Initials QAD a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). �%20A 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. &16 e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) NJ) f. The basin length to width ratio is greater than 3:1. 0A /) — g. The basin side slopes above the permanent pool are no steeper than 3: 1. NIA eA1124 h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). DAD a64 i. Vegetative cover above the permanent pool elevation is specified. NIA exLiL15 j. A trash rack or similar device is provided for both the overflow and orifice. 1� k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. �!. V) NIA 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. m. A mechanism is specified which will drain the basin for maintenance or an emergency. Y, Ba!V' Co, okt� kv C11,01'ad wa P�pj'_J. 111. 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) 0 does 0 does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay. FormSWU-102 Rev3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 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. 3. 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 serni-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. FOREBAY feet in the main pond, the sediment shall be removed. feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation Sediment Removal Elevation 175% Bottom Elevation 1625% MAIN POND 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. Form SWU- 102 Rev 3.99 Page 3 of 4 7. All components of the wet detention basin system shall be maintained in good working order. 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: Mr. Daniel F. Scanlon, II Coun Address:— PO Box 39, Currituck,INC 27929 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. -9 (2511h,01-7' allotary Public forthe State of (1kre'lina- , C /0 halotel F _q(iorgolan 2L ounty of do hereby certify that personally appeared before me this 644 day of lVoVPIA�her and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, My commission expires ) up% &- ,2,71. �? a o / FormSWU-102 Rev3.99 Page 4 of 4