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HomeMy WebLinkAboutSW8990923_Current Permit_20171101Energy, Mineral & Land Resources ENVIRONMENTAL GUALITV November 1, 2017 Mr. Jim Morton, Acting President Cape Fear Community College 411 North Front Street Wilmington, NC 28401 Subject: State Stormwater Management Permit No. SW8 990923 Cape Fear Community College North Campus High Density Project New Hanover County Dear Mr. Morton: ROY COOPER Governor MICHAEL S. REGAN Secretary TRACY DAVIS Director The Wilmington Regional Office received a complete, modified State Stormwater Management Permit Application for the subject project on October 31, 2017. 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 effective September 1, 1995. We are forwarding modified Permit No. SW8 990923 dated November 1, 2017, for the construction, operation and maintenance of the stormwater control measures (SCMs), built -upon areas, as well as the stormwater collection system and/or vegetated conveyance system associated with the subject project. Please add the attached plans to the previously approved plan set. This permit shall be effective from the date of issuance until January 28, 2022 and shall be subject to the conditions and limitations as specified therein, and does not supersede any other agency permit that may be required. Please pay special attention to the permit conditions regarding the operation and maintenance of the SCMs, stormwater collection system, and/or vegetated conveyances; the limitation of built -upon area; modification of the project; the procedures for changing ownership of and/or transferring the permit; and the need to renew the permit. Please also pay attention to the permit conditions that requires the recordation of deed restrictions and protective covenants, easements, and the maintenance agreement, which must all be provided along with certification upon completion of the project. Failure to comply with these requirements will result in future compliance problems. The following modifications are included and covered by this permit: Pond 5 has been reallocated as shown in Table 1. Table 1 Pond 5 8/11/15 11/1/17 Impervious Surfaces: 128 136 128,136 Buildings: 26,780 1 27,436 Parking: 96 534 95,878 Sidewalk: 4 822 4,822 Future: 0 0 ftZ ftZ ftZ ftZ ftZ State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources Wilmington Regional office 1 127 Cardinal Drive Extension I Wilmington, NC 2WS 910 796 7215 State Stormwater Permit Nu. SW8 990923 Page 2 of 2 If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adiudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 150B of the North Carolina. General Statutes and must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Kelly Johnson in the Wilmington Regional Office, at (910) 796-7215. Sincerely, 'rTracy Davis, E., Director Division of Energy, Mineral and Land Resources Enclosures: Attachment A — Designer's Certification Form GDS/kpj: \\\Stormwater\Permits & Projects\1999\990923 HD\2017 11 permit 990923 cc: Howard Resnick, PE, CSD Engineering Inspector, New Hanover County Building Inspections NCDOT District Engineer New Hanover County Engineering Wilmington Regional Office Stormwater File State of North Carolina I Environmental Quality 1 Energy. lAineral and Land Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington. NC 28405) 910 796 7215 State Stormwater Management Systems Permit No. SW8 990923 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Trustees of Cape Fear Community College Cape Fear Community College - North Campus 4500 Blue Clay Road, Wilmington, New Hanover County FOR THE construction, operation and maintenance of five (5) wet detention ponds in compliance with the provisions of 15A NCAC 2H .1000, effective September 1, 1995 (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 Energy, Mineral and Land Resources and considered a part of this permit. This permit shall be effective from the date of issuance until January 28, 2022 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the appliration and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 of this permit. The stormwater controls designated as Ponds 1, 2, 3, 4, and 5 have been designed to handle the runoff from a total of 1,268,467 ft2, 280,526 ft2, 1,219,680 ft2, 536,037 ft2, and 128,136 ft2, respectively, of built -upon area. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The built -upon area within each pond's drainage area will be limited to the amount of built -upon area indicated in Section 1.2 and 1.6 of this permit, the approved plans and application. Page 3 of 9 State Stormwater Management Systems Permit No. SW8 990923 5. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 6. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. a. Drainage Area, acres: Onsite: Offsite: b. Impervious Surfaces, ft2: Buildings, ft2: Street, ft2: Parking, ft2: Sidewalk, ft2: Other, ft2: Future Area, ft2: c. Pond Depth, feet: d. Permanent Pool Elev., FMSL: e. PP Surface Area, ft2: f. Storage Volume Provided, ft3: g. Storage Elevation, FMSL: h. Controlling Orifice Pipes: i. Permanent Pool Volume, ft3: j. Maximum Fountain HP: k. Forebay Volume, ft' I. Receiving Stream: m. Index Number: n. Classification: II. SCHEDULE OF COMPLIANCE Pond 1 Pond 2 Pond 3 Pond 4 Pond 5 41.60 9.20 40.00 14.48 3.85 1,812,096 400,752 1,742,400 630,749 167,644 0 0 0 0 0 1,268,467 280,526 1,219,680 536,037 128,136 31,363 15,790 189,626 25,265 27,436 11,761 33,625 74,488 13,939 0 91,040 68,598 617,508 361,112 95,878 31,220 1,560 148,248 871 4,822 0 1,313 46,174 32,060 0 1,103,083 159,640 143,636 102,790 0 6.00 5.00 5.50 4.50 4.50 (avg) 27.50 25.00 25.00 27.50 30.0 96,948 31,061 78,605 43,456 15,983 104,265 25,732 99,785 46,300 29,366 28.55 25.80 26.20 28.50 31.50 3 @3.0" cp 1 @2.0" cp 2 @3.0" cp 1 @3.0" cp 1 @2.0" cp 515,398 100,021 260,854 142,780 67,943 2 1/3 1 1/2 1/4 105,041 20,404 59,461 29,250 14,013 Prince George Creek CPF23 (18-74-53) "C; Sw" 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface except roads. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals inrhidinn but not limited to: 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. g. Access to the outlet structure must be available at all times. Page 4 of 9 State Stormwater Management Systems Permit No. SW8 990923 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DEMLR. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. Decorative spray fountains will be allowed in the stormwater treatment system, subject to the foiiowing criteria: a. The fountain draws its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. C. The fountain may not be located in the forebay. d. The falling water from the fountain must be centered in the main pond, away from the shoreline. e. The maximum horsepower for the fountain's pump is based on the permanent pool volume and is listed in Section 1.60) of this permit. Where the permanent pool volume is less than 30,000 ft3, no fountain is allowed. 6. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. 8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 9. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to the approved plans, regardless of size. b. Redesign or audition to the approved amount of buiit-upon area. C. Further development, subdivision, acquisition, or sale of any, all or part of the project area. d. Alteration of any aspect of the approved stormwater drainage system and/or the approved stormwater BMPs. e. The construction of any permitted future development areas shown on the approved plans. 10. The Director may determine that other revisions to the project should require a modification to the permit. 11. A copy of the permit, application, supplements, approved plans and specifications shall be maintained on file by the Permittee for the life of the project. 12. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon area. Page 5 of 9 State Stormwater Management Systems Permit No. SW8 990923 13. The runoff from all built -upon area within the specified drainage areas of the project must be directed into the appropriate stormwater control system. 14. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable to any person or entity without notice to and approval by the Director. At least 30 days prior to a change of ownership, or a name change of the Permittee or of the project, or a mailing address change, the permittee shall submit a completed and signed Name/Ownership Change Form to the Division accompanied by the supporting documentation as listed on the form. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division deems the project to be in compliance and approves the transfer. 2. Any individual or entity found to be in non-compliance with the provisions of this stormwater management permit or the requirements of the stormwater rules, is subject to enforcement procedures as set forth in NCGS 143, Article 21. 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, the Permittee shall take immediate corrective action, including those as may be required by the Division of Energy, Mineral and Land Resources, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DEQ Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. 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. 7. The permittee shall submit a permit renewal application and fee to the Division of Energy, Mineral and Land Resources at least 180 days prior to the expiration date of this permit. 8. If the use of permeable pavement is desired, this permit must be modified to add the permeable pavement conditions. Page 6 of 9 State Stormwater Management Systems Permit No. SW8 990923 9. All plans previously approved under SW8 990923 and its subsequent modifications are enforceable parts of this permit. Permit modified and reissued this the 1st day of November 2017 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Tracy Da\&, P.E., Director Division of Energy, Mineral & Land Resources By Authority of the Environmental Management Commission Permit Number SW8 990923 Page 7 of 9 State Stormwater Management Systems Permit No. SW8 990923 Attachment A Cape Fear Community College -North Campus Page 1 of 2 Stormwater Permit No. SW8 990923 Modification (Modification to Pond 5) .New Hanover County Designer's Certification 1, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/weekly/ full time) the construction of the project, roject for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Gate SEAL Page 8 of 9 State Stormwater Management Systems Permit No. SW8 990923 Certification Requirements: Page 2 of 2 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. The outlet/bypass structure elevations are per the approved plan. 5. The outlet/bypass structure is located per the approved plans. 6. A Trash Rack is provided on the outlet/bypass structure. 7. All slopes are graded to the required H:V ratio and are stable and grassed with permanent vegetation, as specified on the plans. 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. 10. The permitted amounts of surface area and/or volume have been provided. 11. Required drawdown devices are correctly sized per the approved plans. 12. All required design depths are provided. 13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 14. The vegetated shelf is the permitted width (10') and slope (10:1), and is planted with the required number and specified type of wetlands plants. 15. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDEQ-DEMLR Regional Office New Hanover County Building Inspections Page 9 of 9 DEMLR USE ONLY ° Date Received Fee Paid (express only) Permit Number Ito C1 1 40 1 61&o gamn State of North Carolina Department of Environment and Natural Resources Division of Energy, Mineral and Land Resources STORMWATER MANAGEMENT PERMIT PLAN REVISION A—PPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Stormwater Management Permit Number: SW8990923 2. Project Name: Cape Fear Community College North Campus 3. Permit Holder's name (specify the name of the corporation, individual, etc.): 5-GEIVE ()d . 4. Print Owner/Signing Official's name and title (person legally responsible for Tim Morton, Acting President .�; 5. Mailing Address for person listed in item 2 above: 411 North Front Street City:Wilmington State:NC Zip:28401 Phone: (910 ) 362-7065 Email:wlee®ek".eda if ftA d.L II. PLAN REVISION INFORMATION Fax: (910 ) 362-7046 1. Summarize the plan revision proposed (attach additional pages if needed): Replacing section of permitted parking lot with a covered shed for machinery_ parking. III. 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. The complete application package should be submitted to the DEMLR Office that issued the permit. 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. • Original & 1 copy of the Plan Revision Application Form �t • Two (2) copies of revised plans (must be revisions of original approved plan sheet(s)) If applying for Express review (only available in 20 coastal counties): • Application fee of $500.00 (made payable to NCDENR) VI. APPLICANT'S CERTIFICATION 1, (print or type name of person listed in General Information, item 3) Tim Morton, Acting Presi den t certify that I have authorized these plan revisions and that the information included on this plan revision application is, to the best of my knowledge, correct and complete. Date: A2 ---)��12 Plan Revision Fonn Rev. Oct. 31, 2013 t CDEWR North Carolina Department of Environment and Natural Resources Pat McCrory Donald van der Vaart Governor Secretary August 11, 2015 Dr. Amanda Lee, President Cape Fear Community College 411 North Front Street Wilmington, NC 28401 Subject: State Stormwater Management Permit No. SW8 990923 Modification Advanced + Emerging Technologies Center, Cape Fear Community College - North Campus High Density Project New Hanover County Dear Dr. Lee: The Wilmington Regional Office received a complete, modified Stormwater Management Permit Application for the addition of the Advanced + Emerging Technologies Center - Cape Fear Community College - North Campus on August 10, 2015. 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. SW8 990923 MOD dated August 11, 2015 for the construction, operation and maintenance of the BMP's and built -upon areas associated with the subject project. This permit shall be effective from the date of issuance until January 28, 2022, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the conditions listed in this permit regarding the Operation and Maintenance of the BMP(s), recordation of deed restrictions, procedures for changing ownership, transferring the permit, and renewing the permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system, to record deed restrictions, to transfer the permit, or to renew the permit, will result in future compliance problems. The following modifications are included and covered by this permit: 1. Runoff from the AET site will use existing permitted wet detention basin (Pond 3). 2. Runoff from the HEATT site will be treated in a new wet detention basin (Pond 5). If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings . (OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes, and must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding. Division of Energy, Mineral, and Land Resources Land Quality Section - Wilmington Regional Office 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 (910) 796-7215 / Fax: (910) 350-2004 - Internet: hftp://portal.ncdenr.org/webA Dr. Amamda Lee August 11, 2015 If the property for this project has been/will be sold or legally transferred to another entity OR, the project or permit holder has changed its name and/or mailing address, it is your responsibility as the permittee to submit a completed and signed Name/Ownership change form to DEMLR at least 30 calendar days prior to making the changes. These forms are available on our website at: hftp://portal.ncdenr.org/web/Ir/state-stormwater-forms docs. If you have any questions, or need additional information conceming this matter, please contact Steve Pusey in the Wilmington Regional Office, at (910) 796-7215. Sincerely, csJ for Tracy Davis, P.E., Director Division of Energy, Mineral and Land Resources GDS1sgp: G:1WQ1SharedlStormwaterlPermits & Projects119991990923 HD12015 08 permit 990923 cc: Mark Arcuri, PE — Criser, Troutman, Tanner Consulting Engineers New Hanover County Building Inspections Beth Wetherell, New Hanover County Engineering Wilmington Regional Office Page 2 of 2 State Stormwater Management Systems Permit No. SW8 990923 MOD STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Trustees of Cape Fear Community College Cape Fear Community College - North Campus 4500 Blue Clay Road, Wilmington, New Hanover County FOR THE construction, operation and maintenance of five (5) wet detention ponds 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 Energy, Mineral and Land Resources and considered a part of this permit. This permit shall be effective from the date of issuance until January 28, 2022 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 of this permit. The stormwater controls designated as Ponds 1, 2, 23, 4, and 5 gave been designed to handle the runoff frgm a total of 1,268,467 ft , 280,526 ft , 1,219,680 ft , 536,037 ft , and 128,136 ft , respectively, of built --upon area. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The built -upon area within each pond's drainage area will be limited to the amount of built -upon area indicated in Section 1.2 and 1.6 of this permit, the approved plans and application. 5. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. Page 3 of 9 State Stormwater Management Systems Permit No. SW8 990923 MOD 6. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. Pond 1 Pond 2 Pond 3 Pond 4 Pond 5 a. Drainage Area, acres: 41.60 9.20 40.00 14.48 3.85 Onsite: 1,812,096 400,752 1,742,400 630,749 167,644 Offsite: 0 0 0 0 0 b. Impervious Surfaces, ft2: 1,268,467 280,526 1,219,680 536,037 128,136 Buildings, ft2: 31,363 15,790 189,626 25,265 26,780 Street, ft2: 11,761 33,625 74,488 13,939 0 Parking, ft2: 91,040 68,598 617,508 361,112 96,534 Sidewalk, ft2: 31,220 1,560 148,248 871 4,822 Other, ft2: 0 1,313 46,174 32,060 0 Future Area, ft2: 1,103,083 159,640 143,636 102,790 0 c. Pond Depth, feet: 6.00 5.00 5.50 4.50 4.50 (avg) d. Permanent Pool Elev., FMSL: 27.50 25.00 25.00 27.50 30.0 e. PP Surface Area, ft2: 96,948 31,061 78,605 43,456 15,983 f. Storage Volume Provided, ft3: 104,265 25,732 99,785 46,300 29,366 g. Storage Elevation, FMSL: 28.55 25.80 26.20 28.50 31.50 h. Controlling Orifice Pipes: 3 @3.0" g 1 @2.0" cp 2 @3.0" g 1 @3.0" cp 1 @2.0" cp i. Permanent Pool Volume, ft3: 515,398 100,021 260,854 142,780 67,943 j. Maximum Fountain HP: 2 1/3 1 1/2 1/4 k. Forebay Volume, ft3: 105,041 20,404 59,461 29,250 14,013 I. Receiving Stream: Prince George Creek m. Index Number: CPF23 (18-74-53) n. Classification: "C; Sw" II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface except roads. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of 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. g. Access to the outlet structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DEMLR. The records will indicate the date, activity, name of person performing the work and what actions were taken. Page 4 of 9 State Stormwater Management Systems Permit No. SW8 990923 MOD 5. Decorative spray fountains will be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain draws its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. C. The fountain may not be located in the forebay. d. The falling water from the fountain must be centered in the main pond, away from the shoreline. e. The maximum horsepower for the fountain's pump is based on the permanent pool volume and is listed in Section 1.90) of this permit. Where the permanent pool volume is less than 30,000 ft , no fountain is allowed. 6. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. 8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 9. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to the approved plans, regardless of size. b. Redesign or addition to the approved amount of built -upon area. C. Further development, subdivision, acquisition, or sale of any, all or part of the project area. d. Alteration of any aspect of the approved stormwater drainage system and/or the approved stormwater BMPs. e. The construction of any permitted future development areas shown on the approved plans. 10. The Director may determine that other revisions to the project should require a modification to the permit. 11. A copy of the permit, application, supplements, approved plans and specifications shall be maintained on file by the Permittee for the life of the project. 12. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon area. 13. The runoff from all built -upon area within the specified drainage areas of the project must be directed into the appropriate stormwater control system. Page 5 of 9 State Stormwater Management Systems Permit No. SW8 990923 MOD 14. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable to any person or entity without notice to and approval by the Director. At least 30 days prior to a change of ownership, or a name change of the Permittee or of the project, or a mailing address change, the permittee shall submit a completed and signed Name/Ownership Change Form to the Division accompanied by the supporting documentation as listed on the form. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division deems the project to be in compliance and approves the transfer. 2. Any individual or entity found to be in non-compliance with the provisions of this stormwater management permit or the requirements of the stormwater rules, is subject to enforcement procedures as set forth in NCGS 143, Article 21. 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, the Permittee shall take immediate corrective action, including those as may be required by the Division of Energy, Mineral and Land Resources, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. 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. 7. The permittee shall submit a permit renewal application and fee to the Division of Energy, Mineral and Land Resources at least 180 days prior to the expiration date of this permit. 8. If the use of permeable pavement is desired, this permit must be modified to add the permeable pavement conditions. 9. All plans previously approved under SW8 990923 and its subsequent modifications are enforceable parts of this permit. Page 6 of 9 State Stormwater Management Systems Permit No. SW8 990923 MOD Permit revised, renewed and reissued this the 11 h day of August, 2015. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Division of Energy, Mineral &Land Resources By Authority of the Environmental Management Commission Permit Number SW8 990923 Page 7 of 9 J!Vl%1/19!�- DWQ USE ON1. Da* RecAved, Fee Paid PArm# Number ov Applicable Mule : I 9f Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph II - Post C ction (select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ Mgmt Plan: State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATIO14 ORM This form may be photocopied for use as an original il AUG 14 20% I. GENERAL INFORMATION BY: 1. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Advanced + Emerging Technologies Center - Cape Fear Community College - North Campus 2. Location of Project (street address): 4500 Blue Clav Road City -Castle Hayne County New Hanover Zip:28429 3. Directions to project (from nearest major intersection): From intersection of NC Hwy 132 (991kM Road) and SR 1318 (Blue Clay Road) proceed 0.25 miles north on Blue Clav Road. Turn right on SR 1336 (Sidburr Road). AET site is 01 males on right Proceed 0.3 further. Turn right on Education Loop. HEATT site is 02 miles cm left 4. Latitude:34* 19' 36" N Longitude:77° 52' 35" W of the main entrance to the project. II. PERMIT INFORMATION: 1. a. Specify whether project is (check one): ❑New ®Modification ❑ Renewal w/ Modificationt tRenewals with modifications also requires SWU 102 - Renewal Application Form b.If this application is being submitted as the result of a modification to an existing permit, list the existing permit number SW8-990923 , its issue date (if known) 1/14/14 (Plan Rev) , and the status of construction: ®Not Started ❑Partially Completed* ❑ Completed* *provide a designer's certification 2. Specify the type of project (check one): ' ❑Low Density ®High Density ❑Drains to an Offsite Stormwater System ❑Other 3. If this application is being submitted as the result of a previously returned application or a letter from DWQ requesting a state stormwater management permit application, list the stormwater project number, if assigned, N/A 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): ❑LAMA Major ®Sedimentation/Erosion Control 19 ac of Disturbed Area ❑NPDES Industrial Stormwater ❑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 pernritNJA 5. Is the project located within 5 nines of a public airport? ❑No ®Yes If yes, see S.L. 2012-200, Part VI: httl2:Hportal.ncdenr.org/web/wq/ws/su/statesw/rules laws Form SW-101 Version 06Aug2012 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 project): Applicant/Organization:Cape Fear Community College Signing Official & Title:Ted D. Sprin y- President 2>,-. A mg n JEr Lee— b. Contact information for person listed in item la above: Street Address:411 North Front Street City:Wilmington State:NC Zip:28401 Mailing Address (if applicable):N/A City: State: Zip: Phone: (910 ) 362-7004 Fax: (910 ) 763-2279 Email:kpearce®cfcc.edu 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:t City: Mailing Address (if City: Phone: ! 1 Email: Fax: (0 )_� Y: 3. a. (Optional) Paint the name and title of another contact such as the projects construction supervisor or other person who can answer questions about the project. Other Contact Person/Organization:Cape Fear CommunitECollege Signing Official & TitleXen Pearce - Director of Institutional Services b. Contact information for person listed in item 3a above: Mailing Address.411 North Front Street City -Wilmington State:NC Zip:28401 Phone: (910 ) 362-7004 Fax: (910 ) 763-2279 Email: 4. Local jurisdiction for building permits: New Hanover County Point of Contact -Chris O'Keefe Phone #: (910 ) 798-7164 Form SW-101 Version 06Aug2012 Page 2 of 6 IV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. Runoff from the AET site will use existing permitted wet detention basin (Pond 3). Runoff from HEATT site will be treated in a new wet detention basin (Pond 5). 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. Stormwater runoff from this project drains to the Cape Fear River basin. 4. Total Property Area:19 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+:19 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 High Water (NHM line or Mean High Water (MHW) Iine, and coastal wetlands landward from the NHW (or MHM line. The resultant project area is used to calculate overall percent built upon area (BUA). 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) X 100 = 36 % 9. How many drainage areas does the project have?2 (For high density, count 1 for each proposed engineered stormwater BMP. For Iow density and other projects, use 1 for the whole property 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. Pasin Information Drainage Area 3 DTahiage Area, Drainage Area Drainage Am Receiving Stream Name Prince George Cr Prince George Cr Stream Class * C; Sw C; Sw Stream Index Number * 18-74-53 18-74-53 Total Drainage Area (so 1,742,400 167,644 On -site Drainage Area (sf) 1,742,400 167,644 Off -site Drainage Area (sf) 0 0 Proposed Impervious Area** s 1,219,680 128,136 % Impervious Area** total 70 76 Im rvious" Surface Area DrainageAreaJ DrainageAreal DrainageArea Draina Area On -site Buildings/Lots (s 189,626 26,780 On -site Streets (sf) 74,488 0 On -site Parking (sf) 617,508 96,534 On -site Sidewalks (sf) 148,248 4,822 Other on -site (sf) 46,174 0 Future (sf) 143,636 0 Off -site (sf) 0 0 Existing BUA*** (sf) 1 0 1 0 Total (sf): 1 1,219,680 1 128,136 * Stream Class and Index Number can be determined at: htt2aortal.ncdenr.or /ioq eb/u,q&s/csu/classi cations 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 06Aug2012 Page 3 of 6 Attachment for Pond 3 Areas NCDENR Stormwater Permit SW8 990923 Existing Permit (SF) Proposed Change (SF) Proposed Revised Permit (SF) On -site Buildings 117,176 72,450 189,626 On -site Streets 74,488 0 74,488 On -site Parking 526,640 90,868 617,508 On -site Sidewalks 125,988 22,260 148,248 Other on -site 46,174 0 46,174 Future 329,214 -185,578 143,636 Off -site 0 0 0 Existing BUA 0 0 0 Totals 1,219,680 0 1,219,680 AUG 14 2014 BY: 11. How was the off -site impervious area listed above determined? Provide documentation. Proiects in Union County: Contact DWQ Central Office staff to check if the project is located within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater requirements 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 fromhttp://i)ortal.ncdenr.org/web/wci/ws/su/bmv-manual. 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. A detailed application instruction sheet and BMP checklists are available from http://poi..al.ncdenr.org/web/wq/ws/su/statesw/forms docs. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map at http:/ /portal.ncdenr.org/web/wq/ws/su/map .) Please indicate that the following required information have been provided by initialine 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 .kft:/'/12ortal.ncdenr.org/web/wq/ws/su/statesw/forms does. Initials 1. Original and one copy of the Stormwater Management Permit Application Form. �i fk 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants Form. (if required as per Part V11 below) 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 tc) http:/ /www.envhelp.org/pages/onestoRexpress.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/managementfor r the project: This is required in addition to the brief summary provided in the Project Information, item 1. 6. A USGS map identifying the site location_ If the receiving stream is reported as class SA or the _ MtK receiving stream drains to class SA waters within'/s mile of the site boundary, include the Y2 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 -- a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. nECEIVE e. North arrow. f. Scale g. Revision number and dates. $' AUG 14 2014 h. Identify all surface waters on the plans by delineating the normal pool elevatio impounded structures, the banks of streams and rivers, the MHW or NHW line 'dal 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. in. 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. it 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). p- Vegetated buffers (where required) - Form SWU-101 Version 06Aug2012 Page 4 of 6 9. Copy of any applicable soils report with the associated SHWT elevations (Please identify �`� elevations in addition to depths) as well as a map of the boring locations with the eAstung elevations and boring logs. Include an 8.5"x11" copy of the NRCS County Soils map with the project area dearly 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 DWQ to verify the SHVVT prior to submittal, (910) 796-7378.) 1jt 10. A copy of the most current property deed. Deed book Nffk4rWJ> Page No: 11. For corporations and limited liability corporations (r LC): Provide documentation from the NC It( /^y Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in Contact Information, item 1a, 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/CSeardL@gRx VII. 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 ht!p://portal.ncdenr.org/web/wg/­ws/su/statesw/forms doc . 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 restrictions and protective covenants for this project, if required, shall include all the items required in the permit and listed on the fornns 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 DWQ 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 Mark T. Arcuri, PE Consulting Firm: Criser Troutman Tanner Consulting Engineers Mailing AddressMM Peachtree Avenue, Suite 102 City:Wilmington State:NC Zip:28403 Phone: (910 ) 397-2929 Fax: (910 ). 397-2971 Einaflmun-curi@gggngineering.com gggngineering.com DL PROPERTY OWNER AUTHORIZATION (if Contact Infi m7nation, item 2 has been filled out, 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 type name of person listed in Contact Information, item 1a) with (print or type name of organization listed in Contact Information, item 1a) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal., which indicates the party responsible for the operation and maintenance of the stormwater system. Form SWU-101 Version 06Aug2012 AUG 14 2014 BY: Page 5 of 6 Map Output Page 1 of 1 r Lots New Hanover County Parcel Numbers ;` Cape Fear Community College - North Campus 4 8 5/ 7 1 M ECEIVI AUG 14 2014 BY. 1 - R02600-004-005-000 - 100.98 Acres 2 - R01 800-004-001 -001 - 1.29 Acres 0 `k 3 - R01800-004-001-004 - 1.35 Acres Ae-r TO Z3 60 M4 0100 * 4 - R01800-004-001-005 - 3.54 Acres A-G ( Df� Z 3 6'Z PC4 066 ) 5 - R01800-004-001-006 - 1.52 Acres W V 3 Z.36 2 P'CI 0692 6 - R01800-004-003-000 - 0.80 Acres -pt3 7,362 M 0 6 S8 7 - R01800-004-002-000 - 2.85 Acres ' PCT 0 6b 8 - R01800-004-001-003 - 29.76 Acres -.t82SW Rj 01Zj- Total - 142.09 Acres vwde a cgov. sery com.esn.esr�ffp. srimap?ServiceName=overvie... 11/30/2011 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 DWQ Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DWQ 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 personally appeared before me this _ day of 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 CERTMCATION I, (print or type name of person listed in Contact Information, item 1a) Ted D. Spring 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. Signature: J Date: / 02. y I, VP% E5 A W t L L I A S b N , a Notary Public for the State ofr� W�l unty of -A"-6 Offi, ,SCy'1, do hereby certify that rJ . lXJV personally appeared before me this a day of '1 , oZ,� �. and acknowledge the due execp 'on of the application for a stormwater permit. Witness my hand and official seal, W f �i�I;\lw My commission expires k i — ,J h - � 0 l -1 AUGri, I 14 tow Form SWU-101 Version 06Aug2012 Page 6 of 6 Permit No. (to be provided by DWQ) 91,711, 171R W�., ��p W ATFRO M-MM > C P -~C STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filed out, printed end submffted. The Required Items Checklist (Part 111) must be prtrtted, filled out and submitted aft with aH of the required inlbrmafion. L PROJECT 111FORMATION Project name Cape Fear Community College - HEATT Pond Contact person Ken Pearce Phone number 910-3a7004 Date 6 Aug-14 Drainage area number 5 ti. DESIGN INFORMATION Site Characteristics Drainage area 169,697 fe Impervious area, post -development 130,593 fe % impervious 76.96 % Design rainfall depth 1.5 in Storage Volume: Non -SA Waters Minimum volume required 15,752 ft Volume provided 29'366 fe OK, volume provided is equal to or in excess of volume required. Storage Volume: SA Waters 1.5' runoff volume ft3 Pre -development 1-yr, 24-hr runoff f? Post -development I-yr, 24-hr runoff ft3 Minimum volume required ft3 Volume provided ft Peak Flow Calculations lathe prelpost control of the 1yr 24hr stone peak flow required? 1-yr, 24-hr rainfall depth Rational C, Pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hrstonn Pre -development i yr, 24-hr peak Row I'os'Amelopment 1-yr, 24-hr peak flan Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pod elevation SHWT elevation (approx. at the perm. pool elevation) Top of 1011 vegetated shelf elevation Bottom of 10ft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stored above the state -required temp. pool? Elevation of the top of the additional volume (Y or N) 3.8 in 0.15 (unitless) 0.78 (unitless) 0.16 inlhr OK 0.09 6sec 0.48 i f3isec 0.39 fOlsec 31.50 fmsl 30.00 fmsl 30.50 fmsl 30.50 final 29Y frrhsl Data not needed for calculation option #1, but OK I provided. 22.00 frost 21.00 final Data not needed for calculation option #1, but OK 9 provided. 1.00 ft (Y or N) fmsl �t _r AUG 14 2014 BY: Faro SW401 Wet DeWdion Basin-Rev.9.4118112 Paris I. & II. Design Summary, Page 1 of 2 Permit No. (to be provided by DWQJ 1l. DESIGN INFORMATION Surface Areas Area, temporary pool 21,837 ft Area REQUIRED, permanent pool 10,793 ft SAIDA ratio 6.36 (unitless) Area PROVIDED, permanent pool, Ap,„y,d 15,983 if OK Area, bottom of 10ft vegetated shelf, Ab.L ,, 10,350 ft Area, sediment cleanout, top elevation (bottom of pond), Aw_.,d 3,292 if Volumes Volume, temporary pool 29,366 fe OK Volume, permanent pool, V,,P„ i B7,943 f? Volume, forebay (sum offorebays if more than one forebay) 14,013 fO Forebay % of permanent pool volume 20.6% % OK SAIDA Table Data Design TSS removal 90 % Coastal SAIDA Table Used? y (Y or N) MountaiNPiedmont SAIDA Table Used? n (Y or N) SAIDA ratio 6.36 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) y (Y or N) Vokrrne, permanent pool, Vp._p I 67,943 fe Area provided, permanent pool, Ap.-m 15,983 fe Average depth calculated 4.30 It OK Average depth used in SAIDA, d. (Round to nearest 0.5ft) 4.3 it OK Calculation option 2 used? (See Figure 10-2b) n (Y or N) Area provided. permanent pool, A.,,y 15,983 if Area, bottom of 10ft vegetated shelf, AtoL"ff 10,350 fe Area, sediment cleanout, top elevation (bottom of pond), Abdo 3,292 IIF "Depth' (distance b1W bottom of loft shelf and top of sediment) 7.50 ft Average depth calculated ft Average depth used in SAIDA, d. (Round to down to nearest 0.5ft) x ft — %4e Drawdown Calculations Drawdown through orifice? Diameter of orifice (if circular) Area of orifice (If -non -circular) Coefficient of discharge (Co) Driving head (W Drawdown through weir? Weir type Coefficient of discharge (C,.) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak fly Post-developmerd 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir) Storage volume dmwdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of f owpath to width ratio Length to width ratio Trash rack for overflow A orifice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all runoff at ultimate bu ld-out? Drain mechanism for maintenance or emergencies is: y (Y or N) 2.00 in ire 0.60 (unitless) 1.50 ft n _ (Y or N) (unitless) (unitless) ft ft 0.09 f6sec 0.48 f0/sec 0.07 fe/see 2.50 days OK, draws down in tar days. 3 :1 OK 10 :1 OK 10.0 ft OK 3 :1 OK 3.0 :1 OK y (Y or N) OK -y ft OK n (Y or N) OK y (Y or N) OK y (Y or N) OK Portable pump �ECEIVE AUG 14 2014 BY: Form SW401- Wet Detention Basin Rev.SW1B112 Parts I. & II. Design Summary, Page 2 of 2 Permit Number: D5 a�3 ."400 (to be provided by DWQ) Drainage Area Number: Qc*4t> # 6,q r r aids Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BUF 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 BW. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ® does ❑ does not incorporate pretreatment other than a forebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. ECEIVE — Once a year, a darn safety expert should inspect the embankment. AUG 14 2014 After the wet detention pond is established, it should be inspected once a mil and within 24 hours after every storm event greater than 1.0 inches (or 1.5 incheDY& in a — Coastal County). Records of operation and maintenance should be kept in a known set I ocation and must be available upon request Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMW element Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. tation is too short or too rlozng. Maintain vegetation at a height of I approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4 Permit Number: 15W -9 q 9 D 9 2 3 fw 0 0 (to be provided by DWQ) Drainage Area Number: Pe fioli; - #6, 4'r j- V41 BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. if pesticide is used, wipe it on the plants rather than The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. ECEAVI=— AUG 14 2014 Form SW401 Wet Detention Basin O&M-Rev.4 Pag of 4 BY: Permit Number: 5 W '9 rj g 0 (to be provided by DWQ) Drainage Area Number. 5; - f { A -TT /,z 5 . BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps io reutove muskrats and beaver activity is present consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged air or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Wager Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 15.6 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads feet in the forebay, the sediment shall be removed. Sediment Removal Bottom BASIN DIAGRAM 66111 in the blanks) 0 Permanent Pool Elevation 30.00 ?iZ• P anen Pool --Zl - -- -- - --- - Volume Sediment Removal Elevation 2�• Volume ftMin. -------------------------------------------- ------ Sediment Bottom Elevation V-O 1-ft Storage Sedimei Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 AUG 14 2014 BY: Page 3 o Permit Number: SW e qq p g 2 3 /k o (to be provided by DWO I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Advanced + Emerging Technologies Center - Cane Fear Community College - North Campus BMP drainage area number:I Print name:Ted D. Spring Title:President AddressAl l North Front Street Phone:910-362-7004 Date: t2 . oz , C VO 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, -Ti R e- S A 1 CL L A M S D�J , a Notary Public for the State of 7i t-7-&- ��a�z 1 ounty of� � a�A , do hereby certify that personally appeared before me this a day of R,Z.A-VX W A , a p 1 and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, W XAa-rARy U PUBOCJ SEAL My commission expires - a. C) - a C) 1 AUG 14 2014 BY: — Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 DWQ USE ONLY Date Received Fee Paid Permit Number ODD ° p /no A9 Applicable Rules: ❑ Coastal SW -1 95 ❑ Coastal SW -2068 ❑ Ph Il - Post Construction (select all that apply) ❑ Non -Coastal SW- HQ W/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ M t Plan: State of North Carolina Departinent of Environment anu' Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. 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.): Cane Fear Communitv Colle-ae - North Camvus (Carventry Facilitv) 2. Location of Project (street address): 5000 Sidbury Road City: Castle Hayne County: New Hanover Zip: 28429 3. Directions to project (from nearest major intersection): Approx. 0.35 miles north from the intersection of I-140 and US 117/NC 132 to Blue Cla,r}�Road SR1318) then approx. 0.25 miles northeast on SR1318 to Sidbury Road (SR 1336), then approx. 0.25 miles east on SR 1336 to yroject entrance. 4. Latitude:340 19' 37" N Longitude:-77° 52' 29" W of the main entrance to the project. II. PERMIT INFORMATION: 1. a. Specify whether project is (check one): ❑New ®Modification b.If this application is being submitted as the result of a modification to an existing permit, list the existing permit number SW8 990923 , its issue date (if known) , and the status of construction: ®Not Started []Partially Completed* ❑ Completed* *provide a designer's certification 2. Specify the type of project (check one): ❑Low Density ®High Density []Drains to an Offsite Stormwater System ❑Other 3. if this application is being submitted as the result of a previously returned application or a letter from DWQ requesting a state stormwater management permit application, fist 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): ❑LAMA Major ®Sedimentation/Erosion Control: ❑NPDES Industrial Stormwater ❑404/401 Permit: Proposed Impacts ac of Disturbed Area 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: APR 1 9 Z01Z Form SWU-101 Version 07Jun2010 Page 1 of 6 III. CONTACT INFORMATION 1. a. Print Applicant / Signing OfficiaPs name and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the project): Applicant/Organization: Cape Fear Community College Signing Official & Title: Eric McKeithan, President b. Contact information for person listed in item la above: Street Address: 411North Front Street City: Wilmington State: NC Zip:28401 Mailing Address (if applicable): City: State: Zip: Phone: (910 ) 362-7555 Fax: (910 ) 362-7046 Email:-emckeithan@cfcc.edu 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: State: Zip: Mailing Address (if applicable): City: State: Zip: Phone: ( ) Fax: Email: 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: Signing Official & Title: b. Contact information for person listed in item 3a above: Mailing Address: City: State: Zip: Fonn SWU-101 Version 07Jun2010 Page 2 of 7 APR 1 9 Z01Z Phone: Email: Fax: 4. Local jurisdiction for building permits: Point of Contact: Phone #: IV, PROJECT INFORMATION 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. stormwater will be collected in a closed conduit system and discharge to a posed wet detention basin 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 PUB 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 H - Post Construction 3. Stormwater runoff from this project drains to the Cape Fear River basin. 4. Total Property Area: 15.89 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+: 15.89 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 (Nline or Mean High Water (MHV1q line, and coastal wetlands landward from the NHW (or MH1 � line. The resultant project area is used to calculate overall percent built upon area (B UM). Non -coastal wetlands landward of the NHW (or MHVV) line may be included in the total project. area. 8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 56 % 9. How many drainage areas does the project have?1 (For high density, count I for each proposed engineered stormwater BMP. For low density and other projects, use 1 for the whole property 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. APR 1 g ZU1Z Form SWU-101 Version 07Jun2010 Page 3 of 7 Basin Information Dramaw, Area 5 Drainage Area 1 Drainage Area 2 Dramage Area 3 Receiving Stream Name UT Prince George Creek UT Prince George Creek UT Prince George Creek UT Prince George Creek Stream Class * C;Sw C;Sw C;Sw C;Sw Stream Index Number * CPF23 (18-74-53) CPF23 (18-74-53) CPF23 (18-74-53) CPF23 (18-74-53) Total Drainage Area (sf) 58,776 1,1812,096 400,752 1,742,400 On -site Drainage Azck (cf) 58,776 1,812,096 400,752 1,742,400 Off -site Drainage Area (sf) 0 0 0 0 Proposed Impervious Area** s 32,840 1,268,467 280,526 1,219,680 % Im ervious Area** total 56 1 70 70 70 Impervious" Surface Area Drainage Area 5 Drama a Area I Drainage Area 2 Drainage Area 3 On -site Buildings/Lots (sf) 8,820 31,363 15,790 117,176 On -site Streets (so 0 11,761 33,625 74,488 On -site Parking (so 21,370 91,040 68,598 526,640 On -site Sidewalks (sf) 2,650 31,220 1,560 125,988 Other on -site (sf) 0 0 $ 13 1 3 46,174 Future (sf) 0 1,103,083 159,640 329,214 Off -site (sf) 0 0 0 0 Existing BUA*** (so 0 0 0 0 Total (sf): 32,840 1,268,467 280,526 1,219,680 F btream uass and Index Number can be determined at: ht4z.* portal nedenr org/webfwq/ps/esu/classifications Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. *** Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that is to be removed and which will be replaced by new B UA. 11. How was the off -site impervious area listed above determined? Provide documentation. N/A Proiects in Union Countv: Contact DWQ Central Office staff to check if the project is located within a AFF'e ~ned & Endangered Species watershed that may be subject to more stringent stormwater requirements as per CAT #620.2012 V. SUPPLEMENT AND O&M FORMS BY: fl The applicable state stormwater management permit supplement and operation and maintenance (O&Ni) forms must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded fromhU://12ortal.ncdenr.org web/wq/ws/su/bmp-manual. 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. A detailed application instruction sheet and BMP checklists are available from http://12ortal.ncdenr.org/web/3yq/ws/su/statesw/forms does. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map at http:/ �portal.ncdenr.org web/wgJws/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 http://portal.ncdenr.org/web/wq,/ws/su/statesw/forms does. 1. Original and one copy of the Stormwater Management Permit Application Form. —Vs 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants ICJ Form. (if required as per Part VII below) 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 9� htt :/ /www.gnvheIR.org/-ages/onestol2exRress.html for information on the Express program Form SWU-101 Version 07Jun2010 Page 4 of 7 Dasm Information Praina a Area 4 Drainage Area Drainage Area _ Drama a Area Receiving Stream Name UT Prince George Creek Stream Class * QSw Stream Index Number * CPF23 (18-74-53) Total Drainage Area (sf) 630,749 On -site Drainage Area (sf) 630,749 Off -site Drainage Area (so 0 Proposed Impervious Area** s 536,037 % Impervious Area** total 85 Impervious' Surface Area Drainage Area 4 Dr . ' . e Area Drainage Area _ Drama a Area On -site Buildings/Lots (sf) 25,265 On -site Streets (sf) 13,939 On -site Parking (sf) 361,112 On -site Sidewalks (sf) 871 Other on -site (sf) 32,060 Future (sf) 102,790 Off -site (sf) 0 Existing BUAI (sf) 0 Total (sf): 536,037 MAY 022012 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/managementfor the project. This is required in addition to the brief summary provided in the Project Information, item 1. 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the �D receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the 1/2 mile radius on the map. 7. Sealed, signed and dated calculations. �D 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. 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). p. Vegetated buffers (where required). 9. Copy of any applicable soils report with the associated SHWT elevations (Please identify t6b 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 DWQ to verify the SHWT prior to submittal, (910) 796-7378.) 10. A copy of the most current property deed. Deed book: 2894 Page No: 124 R61) 11. For corporations and limited liability corporations (LLC): Provide documentation from the NC N /A 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 NCAC 2H.1003(e). The corporation or LLC must be listed as an active corporation in good standing -,Ath the NC Secretary of State, otberw;se the application t,�r911 be returned. htW://www.secrttary.state.nc.us/CoMorations/CSearch.asl2x APR 1 9 ZU1z Form SWU-101 Version 077un2010 Page 5 of 7 VII. 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 hgp://portal.ncdenr.org/web/Wq/ws/su/statesw/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 restrictions and protective covenants for this project, if required, shall include all the items required in the permit and lasted 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 DWQ 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: Ryan G. David, PE Consulting Firm: Urban, Ltd. Mailing Address:108 North Ken Avenue, Suite K 1 City: Wilmington Phone: (910 ) 395-1655 Email: rdavid@urban-ltd.com State: NC Zip: 28405 Fax: (910 �395-1451 _ IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, 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 type name of person listed in Contact Information, item 1a) with (print or type name of organization listed in Contact Information, item 1a) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal, which indicates the party responsible for the operation and maintenance of the stormwater system. APR 1 9Z01Z Fonn SWU-101 Version 07Jun2010 Page 6 of 7 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 DWQ Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DWQ 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 personally appeared before me this _ day of 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 rr ` I, (print or type name of person listed in Contact Information, item 1a) t t'1 c- B. 1'� J(,-- „&m 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 stormwa rules un r 15 NCAC ZH .1000, SL 2006-246 (Ph. II- Post Construction) o SL 2008-211. Signature: Date: -3 % ItA-Le- Ue Q a Notary Public for the State of N Q, County of "ems "Q-P%o c3 q 1z , do hereby certify that QJLLC. F" C4kq - CL-(1 personally appeared before me this.A! Stay of I and acknowledge the due execution of the application for a stormwater permit. Witness my hand and official seal, ENew chelle Lee tary Public SEALanover County h Carolinaon Expires 5/11 /2013---------------------- My commission expires cJ t t % 1 aO 125 APR 1 9 Z01Z Form SWU-101 Version 07Jun2010 Page 7 of 7 WKD #90148.80 Permit No. �� g `� i L�3 (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. I. PROJECT INFORMATION Project Name: Capp Fear Qn minity Cnl lPgP Contact Person: _ _ Mark N. Har_ rq nyP, P _ E _ Phone Number: (91 f) ) 762=4200 For projects with multiple basins, specify which basin this worksheet applies to: Pond Nn_ 1 elevations Basin Bottom Elevation 21.50 ft. Permanent Pool Elevation 27.50 ft. Temporary Pool Elevation 28.5 s ft. areas Permanent Pool Surface Area 96,948 sq. ft. Drainage Area 41.6 ac. Impervious Area 29.12 ac. volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Other parameters SA/DA1 Diameter of Orifice Design Rainfall Design TSS Removal 2 (floor.ofthe basin) (elevation of the orifice) (elevation of the discharge structure overflow) (water surface area at the orifice elevation) (on -site and off -site drainage to the basin) (on -site and off site drainage to the basin) 515,398 cu. ft. (combined volume of main basin and forebay) —104-265 cu. ft. (volume detained above the permanent pool) 105,041 cu. ft. (approximately 20% of total volume) 3.90 (surface area to drainage area ratio from DWQ table) (2 to S day temporary pool draw -down required) (minimum 85% required) Form SWU-102 Rev 3.99 Page 1 of 4 Footnotes: When using the Division SA/DA tables, the correct SA/DA 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. 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. U. 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 justification. Applicants Initials /M 1u# a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). mind b. The forebay volume is approximately equal to 20% of the basin volume. �+N c. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. /4;.A e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow M0 calculations) f. The basin length to width'ratio is greater than 3:1. mlyil g. The basin side slopes above the permanent pool are no steeper than 3:1. PK )VA h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail), /mud i. Vegetative cover above the permanent pool elevation is specified. onNR j. A trash rack or similar device is provided for both the overflow and orifice. 114 k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. M N%l 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. fnk)# m. A mechanism is specified Which will drain the basin for maintenance or an emergency. &d pi.11 he ,VmpPr40Oc0t^ 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) 0 does % does not incorporate a vegetated filter at the outlet. This system (check one) 0 does Y does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Pond 1 Maintenance activities shall be performed as follows: Revised 12/22/99 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. 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 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 acp;rnulated sediments. When the permanent pool depth reads 4-5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 3,07 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fall in the blanks) p Permanent Pool Elevation 27.50 Sediment Re�toval El. ZL ai 75 ------ 23.4� - - qo Sediment Removal Elevation 23.00 Bottom Ele ation---------------------------------------------125% --� Bottom Elevation 21 _ -5 FOREBAY 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. Form SWU-102 Rev 3.99 Page 3 of 4 , c 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: Eric B. W(e i u � i Title: R-esld 'lt - GM Address: 411 Sab Fm t Str e Wilmington, �B 28401 910-251 5100 Phone:_ _ L__ Date: G J 3 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, a f 1` l , a Notary Public for the State of B� /`li6//1 County of do hereby certify- that 4 //% G t� • /� personally appeared before me this day of �6 Xel-- !9' 9 and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, i!^ !k i SEAL My commission expiresJF Ar, Form SWU-102 Rev 3.99 Page 4 of 4 Permit No. (to be provided by DWQ) State of North Carolina Revisd 12/22/99 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 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. I. PROJECT INFORMATION Project Name: Cage Fear Camuni ty Col IPgP Contact Person: Mark N. Hargrove,P.E. Phone Number: ( 910) 762-4200 For projects with multiple basins, specify which basin this worksheet applies to: Pond 2 elevations Basin Bottom Elevation 20.0 ft. Permanent Pool Elevation 25.0 ft. Temporary Pool Elevation 25.80 ft. areas Permanent Pool Surface Area 31,061 sq. ft. Drainage Area 9.20 ac. Impervious Area 6.44 ac. volumes Permanent Pool Volume 100,021 cu. ft. Temporary Pool Volume 25.732 cu. ft. Forebay Volume ® 20.404 cu. ft. Other parameters SA/DA1 Diameter of Orifice 2.0 in. Design Rainfall 1 in. (floor of the basin) (elevation of the orifice) (elevation of the discharge structure overflow) (water surface area at the orifice elevation) (on -site and off -site drainage to the basin) (on -site and off -site drainage to the basin) (combined volume of main basin and forebay) (volume detained above the permanent pool) (approximately 20% of total volume) (surface area to drainage area ratio from DWQ table) (2 to 5 day temporary pool draw -down required) Design TSS Removal 2 go % (minimum 85% required) Form SWU-102 Rev 3.99 Page 1 of 4 '4 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 non- standard 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. 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 justification. Applicants Initials M W#- a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). MVA b. The forebay volume is approximately equal to 20% of the basin volume. m A4 c. The temporary pool controls runoff from the design storm event. M/V# d. The temporary pool draws down in 2 to 5 days. Al A e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) MA;W f. The basin length to width'ratio is greater than 3:1. M4 g. The basin side slopes above the permanent pool are no steeper than 3:1. m iv h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). MW# i. Vegetative cover above the permanent pool elevation is specified. MWil j. A trash rack or similar device is provided for both the overflow and orifice. fiF k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. r� u� 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. nine! m. A mechanism is specified vyhic� will drain the basin for maintenance or an emergency. Pecad a,,/l 6.? pv.%,oear dowei M. 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 )K does not incorporate a vegetated filter at the outlet. This system (check one) 0 does Adoes not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Pond 2 Maintenance activities shall be performed as follows: Revised 12/22/99 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. 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 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 aqqumulated sediments. When the permanent pool depth reads 3.75 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 3 •Q� feet in the forcbay? the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) p Permanent Pool Elevation 25.00 Sediment Re oval El. 22.00 .75 21 25 -----21 . ��-- - o� Sediment Removal Elevation ' ----------125% ---- Bottom Ele ation--------------------------------- ---- Bottom Elevation 20.00 FOREBAY 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. 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: Eric B. MNe' l Title: Presld9lt - CFCC Address: 411 Sz& Front Street Wilmington, IBC 2BM1 Pr Si Date: Note: The legally responsible parry 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,je, r t- i 5 , a Notary Public for the State ofAO4e/X County of 2 W D me —, do hereby certify. that 4C-7tr'G ,JF,. P! ✓ Cl� personally appeared before me this 3 '0`� day of DI�I�J�CT,�99j , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SEAL My commission expires 4o D Form SVYU-102 Rev 3.99 Page 4 of 4 Permit No. SW$ l 9f0 I Z3 (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: Cape Fear Community College Contact Person: Mark Hargrove Phone Number: (910) 762-4200 For projects with multiple basins, specify which basin this worksheet applies to: Pond No. 3 elevations Basin Bottom Elevation Permanent Pool Elevation Temporary Pool Elevation areas Permanent Pool Surface Area Drainage Area Impervious Area volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume other parameters SA/DA' Diameter of Orifice Design Rainfall Design TSS Removal Footnotes: 19.5 25.00 26.20 78,605 40.00 28.00 260,854 99,785 59,461 ft. (floor of the basin) ft. (elevation of the orifice) ft. (elevation of the discharge structure overflow) sq. ft. (water surface area at the orifice elevation) ac. (on -site and off -site drainage to the basin) ac. (on -site and off site drainage to the basin) cu. ft. (combined volume of main basin and forebay) cu. ft. (volume detained above the permanent pool) cu. ft. (approximately 20% of total volume) 4.50 2 — 3" orifices in. 1 in. 90 % (surface area to drainage area ratio from, DWQ table) (2 to 5 day temporary pool draw -down required) (minimum 85% required) When using the Division SA/DA tables, the correct SA)DA 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. Form SWU-102 Rev 3.99 Page 1 of 4 II. 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 justification. Applicants Initials lei f+#- a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). A b. The forebay volume is approximately equal to 20% of the basin volume. kw raW_ c. The temporary pool controls runoff from the design storm event. mN6[— d. The temporary pool draws down in 2 to 5 days. !U e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) ,nn.nii9, f. The basin length to width ratio is greater than 3: 1. pp I 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). 0110A i. Vegetative cover above the permanent pool elevation is specified. N+txp 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. rhlVif 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. V in. A mechanism is specified which will drain the basin for maintenance or an emergency. &46wD 11 6 e- Pooyewhop\ 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 aloes not incorporate a vegetated filter at the outlet. This system (check one) O does does not incorporate pretreatment other than a forebay. Form SW-102 Rev 3.99 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 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 4.13' feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 3,0 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation d 25.0 Sediment Re oval ELF22.0 1,5 ---- Sediment Removal Elevation 20 874 7596 Bottom Ele ation 21.0 --------`-------------"------ ----125% ---- Bottom Elevation 19.50 FOREBAY MAINPOND: 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: Eric B. McKeithan Title: President - CFCC Address: 411 South Front Street, Wilmington, NC 28401 Phone: (910) 362-7555 Date: /b/do' Signature: 41ljLf , (4 , wl 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, o`ZLAJ E ,M . O-A L .LO E122 a Notary Public for the State of A)OP--04 e Jk)2-6 LI A)A- County of A)C- Q) %►AA20 V C/2 do hereby certify that G7P-- 10- /3 . , M (2 7-H/ t-A) a D 03 personally appeared before me this N 0 day of C TO 6 Q7 - and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, n TA z. iip4 Iy� N� G�,,`,,e� E� NA`� SEAL My commission expires / --Z IAO/ D (p Form SWU-102 Rev 3.99 Page 4 of 4 Permit No. SW8990923 (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 DWO Stormwater Management Plan Review: A complete stormwaier 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 Cape Fear Community College — North Campus Project Name: Campus Loop Access Road and Truck Driver Training Facility Contact Person: Phil Norris, P.E. Phone Number: (910) 343-9653 For projects with multiple basins, specify which basin this worksheet applies. to: Pond No. 4 elevations Basin Bottom Elevation 23.00 ft. (floor of the basin) Permanent Pool Elevation 27.50 ft. (elevation of the orifice) Temporary Pool Elevation 28.50 ft. (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 43,456 sq. ft. (water surface area at the orifice elevation) Drainage Area 14.48 ac. (on -site and off -site drainage to the basin) �,� Impervious Area l 4"-H !Z ►31 ac. (on -site and off -site drainage to the basin) ( volumes Permanent Pool Volume 142,780 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 46,300 cu. ft. (volume detained above the permanent pool) Forebay Volume 29,250 cu. ft. (approximately 20% of total volume) other parameters SA/DA' Diameter of Orifice Design Rainfall Design TSS Removal Footnotes: 0.064 (surface area to drainage area ratio from, DWQ table) 3.0 in. (2 to 5 day temporary pool draw -down required) 1.0 in. 90 % (minimum 85% required) JUN n 6 ';001 When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing be computed bas upon the actual impervious % and permanent pool depth. Linear interpolation should be emp oye determine e 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. Form SWU-102 Rev 3.99 Page 1 of 4 Footnotes: l • V4= usk-" the Division SA/DA tables, the con -ea SA/DA ratio for Pemment pool sizing should be computed actual impervious % and pemlanent pool depth. Linear interpolation should be staixiard table entries. t employed to determine the co ea a for non 2. In the 20 coastal ornmties, the ant for a veg�tive filter �, be waived if the wet detei 9U"io idli TSS.rernoval. The NCDENR Bhp manual provides design tables ntion basin s defor both 85% TSS removal as9 Preto pm de II. REQUIRED ITEMS CHECKLIST The following checklist outlines desipi requirements per the Stormwater Best Management Practices Manual (N-C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Section: I5 A NCAC 2H .1008. Code Initial in the space provided. to indicate the following design requirements have been met and supportina documentation is attarhed.':.If the applicant has designated an agent in the Stormwater Management Permit Appiicatiori Fotri, tfie'ant uiay initial below. If a requirement has not been met, attach justification. Is 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 3 calculations. 0-f001 vegetative filter is provided at the outlet (include non -erosive flow f. The basin length to width ratio is greater than 3:1. a. 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. 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- ofway. 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. III. WET DETENTION BASIN OPERATION AND MAINTENANCE AOREEMEh"T 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) E] does ® does not i This system (check one) [I does ®does not ncorporate a vegetated filter at the outlet, incorporate pretreatment other than a forebay. 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 temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain g cover to maintain a maximum height of six inches, and remove trash eeded vegetative cover, mow vegetative 3. Inspect and repair the collection system (Le. 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°/oP- f4he original design depth (see diagram below). Removed sediment shall be disposed of in ati tPprop7iate7frtahner 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 3.38 feet in thi'main pond, the sediment shall be removed. When the permanent pool depth reads 3.38 feet in the forebay, the sediment shall be removed. M BASIN DIAGRAM (fill in the blanks) V Permanent Pool Elevation 27.50 Sediment Re oval El. 24.13 ,� 750 - Bottom El vation 23.0 Sediment Removal Elevation 24.13 75% 5%------------------ Bottom El ---- Bottom Elevation 23.0 25% FOREBAY 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. Form SWU-102 Version ? nn 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: Dr. Eric McKeithan Title: President Address: 411 North Front Street, Wilmington, NC 28401 Phone: 910-362-7001 Date: Signa 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, mop- )o . ALI,002 , a Notary Public for the State of NOP—N QA1 )& County of P C A10 l2,, do hereby certify that E/0 15. ffiCkcl -r N personally appeared before me this ' j day of -,j(a,rJ ( c Z6017 and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, NOTARY PUBLIC SEAL My commission expires —L a© I if Form SWU-102 Rev 3.99 Page 4 of 4 State Stormwater Management Systems Permit No. SW8 990923 MOD Cape Fear Community College -North Campus Page 1 of 2 Stormwater Permit No. SW8 990923 Modification (Modification to Pond 5) New Hanover County f l Designer's Certification 1, l�lark, °�• ��'-+end �e , as a duly registered. e A� � �''� in the State of North Carolina, having been authorized to observe (periodically/weekly/ full time) the construction of the project, 2�+r �.a A+tM �t�wl i-tij CtAa�.Q d o r'tt for MM�(Project Owner) hereby state that, to the best of my abilities, ue care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature ` Registration Number Dates ECEIVE jUH 2120V 13Y: Page 8 of 9 SEAL State Stormwater Management Systems Permit No. SW8 990923 MOD Certification Requirements: Page 2 of 2 1�AL1. The drainage area to the system contains approximately the permitted acreage. (V 2. The drainage area to the system contains no more than the permitted amount of built -upon area. �_�- 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. The outlet/bypass structure elevations are per the approved plan. P4k 5. The outlet/bypass structure is located per the approved plans. j +A 6. A Trash Rack is provided on the outlet/bypass structure. tAAA 7. All slopes are graded to the required H:V ratio and are stable and grassed with permanent vegetation, as specified on the plans. PJ4,k 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. 10. The permitted amounts of surface area and/or volume have been provided. !A'►'tC 11. Required drawdown devices are correctly sized per the approved plans. &12. All required design depths are provided. iy"PV ` 13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 14. The vegetated shelf is the permitted width (10') and slope (10:1), and is planted with the required number and specified type of wetlands plants. '15. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DEMLR Regional Office New Hanover County Building Inspections Page 9 of 9 State Stormwater Management Systems Permit No. SW8 990923 Modification A&K #04008 Cape Fear Community College -North Campus Page 1 of 2 Stormwater Permit No. SW8 990923 Modification /^ New Hanover County Designer's Certification I I, J. Phillip Norris, P.E. as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (penodicalIy/weekly/ full time) the construction of the project, Cape Fear Community College -North Campus (Project) for Cape Fear Community College (project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: *This certification is for Pond #4 only. Signature Registration Number 11 Date '? - 31 - O (o R-P�CFTVED FEB2 8 t011 BY: Page 8 of 9 Page 2 of 2 State Stormwater Management Systems Permit No. SW8 990923 Modification Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. '�• The drainage area to the system contains no more than the permitted amount of built -upon area. 3- All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. The outlet/bypass structure elevations are per the approved plan. 5. The outlet structure is located per the approved plans. 6. Trash rack is provided on the outlet/bypass structure. 7. All slopes are grassed with permanent vegetation. 8_ Vegetated slopes are no steeper than 3:1. The inlets are located per the approved plans and do not cause short-circuiting of the system. 41-0, The permitted amounts of surface area and/or volume have been provided. 11. Required drawdown devices are correctly sized per the approved plans. ,,U— All required design depths are provided. ) 13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 14. The overall dimensions of the system, as shown on the approved plans, are ,.�,...;aaa cc: NCDENR-DWQ Regional ice T ony Rober'is, New Hanover County Building Inspector JPN/asn 04008 07-31-06-s-sw-cert- RECEIVED FEB 2 8 2011 BY: Page -9 of 9