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HomeMy WebLinkAboutSW8110906_CURRENT PERMIT_20200827STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 1 U`--\ U�o DOC TYPE $ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2 0 20 0 8 Z"l YYYYMMDD ROY COOPER Governor MICHAEL S. REGAN secretary BRIAN WRENN Director August 2r, 2020 NORTH CAROLINA Environmental Quality MCB Camp Lejeune Attn: Commanding Officer c/o Neal Paul, Deputy Public Works Officer 1005 Michael Road Camp Lejeune, NC 28547 Subject: Permit Renewal State Stormwater Management Permit No. SW8 110906 2D Anglico and 2N BN OPS Complexes Overall Low Density Project with Areas of Higher Density Onslow County Dear Mr. Paul: The Wilmington Regional Office received a complete 8 year Stormwater Management Permit Renewal Application for the subject project on June 2", 2020. The Division is hereby notifying you that permit SW8 110906 has been renewed on August 27th, 2020, and shall be effective until April 30, 2028. For your records, please find enclosed a renewed, updated, and re -issued permit and a copy of the renewal application. Please keep this permit on file at all times. Please note that the renewed, updated, and re -issued permit does not impose new or different terms; it merely restates and clarifies some of the previous terms to provide you with a better understanding of your obligations under the permit. The renewal and reissuance of this stormwater permit does not imply that the site is currently in compliance with the terms and conditions of this state stormwater permit. The plans originally approved on April 30", 2012 and most recently modified on February 23id, 2017, will remain in full force and effect in accordance with the regulations set forth in Title 15A NCAC 2H.1000. This permit is 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 changes of 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. 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 150E 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, need additional copies of the permit or approved plans, please contact Kellie Beth Norris in the Wilmington Regional Office, at (910) 796-7215 or kellie.norris@ncdenr.gov. Sincerely, 1 Brian Wrermt Director Division of Energy, Mineral and Land Resources Enclosures: Attachment A — Designer's Certification Attachment C — Permitting History Renewal Application Documents DES/kbn:\\\Stormwater\Permits & Projects\2011\I 10906 LD\2020 08 permit 110906 cc: Wilmington Regional Office Stormwater File North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources Wilmington Regional Office 1 127 Cardinal Dnve Extension I Wilmington North Carolina 28405 910,796.7215 a vunanw State Stormwater Management Systems Permit No. SW8 110906 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT OVERALL LOW DENSITY DEVELOPMENT WITH AREAS OF HIGHER DENSITY 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 USMCB Camp Lejeune 2D Anglico and 2N OPS Complexes Off Holcomb Boulevard, Camp Lejeune, Onslow County FOR THE construction, operation and maintenance of an overall 24% low density project with areas of higher density being treated by four (4) wet detention ponds, one (1) infiltration basin, and one (1) sand filter in compliance with the provisions of 15A NCAC 2H .1000 and Session Law 2008-211 (hereafter referred to as the "stormwater rules') the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR") and considered an enforceable part of this permit. This permit shall be effective from the date of issuance until April 30, 2028, 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. The overall density within the 160.65-acre project area must be maintained at 24% per the requirements of the stormwater rules. This project area is limited to a maximum of 1,676,974 square feet of impervious area. This project currently proposes a total of 1,535,400 ft2 of built - upon area and 141,574 ft2 of future impervious area. Within the project area, 192,750 ft2 of impervious area is not being picked up or treated. The runoff from the remainder of the project's built -upon area must be collected and treated in one of the stormwater control measures covered by this permit. 3. The stormwater system has been approved for the management of stormwater runoff as described in Section 1.10, 1.11, and 1.12 of this permit. The runoff from all built -upon area within the permitted drainage areas of this project must be directed into the appropriate permitted stormwater control measures. The stormwater controls labeled Pond A, Pond B, Pond C, Pond D, Infiltration Basin, and Sand Filter, have been designed to handle the runoff from 627,687 ft2, 252,148 ft2, 133,601 ft2, 394,958 ft2, 29,621 ft2, and 174,240 ft2 of built -upon area, respectively. 4. The tract and drainage areas will be limited to the amounts of built -upon area indicated in this permit, and per approved plans. The built -upon area for the future development within the drainage areas of Pond A, Pond B, Pond C and Pond D is limited to 3,649 ft2, 10,000 ft2, 10,000 ft2 and 10,000 ft2, respectively. Page 1 of 12 State Stormwater Management Systems Permit No. SW8 110906 5. Within the areas of low density, the only runoff conveyances systems allowed with be vegetated conveyance such as swales with minimum side slows of 3:1 (H:V) as defined in the stormwater rules and approved by the Division. 6. Within the areas of low density, no piping shall be allowed except those minimum amounts necessary to direct runoff beneath an impervious surface such as road or under driveways to provide access. The infiltration system is permitted per the Alternative Design Criteria under Section .1008 (h). The proposed system provides equal or better control, equal or better protection of surface waters and results in no increased potential for nuisance conditions. The infiltration system can store at least 2.5 times the minimum design storm, therefore neither an LS/VFS nor an offline bypass are required. 8. The project shall provide and maintain a minimum 50-foot wide vegetative buffer adjacent all surface waters, measured horizontally from and perpendicular to the normal pool of impounded structures, the top of bank of each side of streams and rivers and the mean high water line of tidal waters. All runoff directed into and through the vegetative buffer must flow through the buffer in a diffuse manner. Any roof drains from the low density areas must terminate at the outer edge of the buffer. 9. Stormwater runoff that is directed to flow through any wetlands shall flow into and through these wetlands at a non -erosive velocity. 10. The following design criteria have been provided in the four wet detention ponds and must be maintained at design condition: Pond A Pond B Pond C Pond D a. Drainage Area, acres: Onsite, ft2: Offsite, ftz: 23.4 1,019,304 0 11.42 497,272 0 5.25 228,797 0 18.52 806,844 0 b. Total Impervious Surfaces, ftz: Onsite, ft2: Offsite, ftz: 627,687 627,687 0 252,148 252,148 0 133,601 133,601 0 394,958 394,958 0 c. Average Pond Design Depth, feet: 4.0 3.5 3.5 3.5 d. TSS Removal Efficiency: 90% 90% 90 . 90% e. Design Storm, inches: 1.5 1.5 1.5 1.5 f. Permanent Pool PP Elevation, FMSL: 13.0 1 12.0 12.0 10.0 g. Permitted PP Surface Area, ftz: 57,953 29,496 22,626 48,499 h. Permitted Storage Volume, ft3: 76,991 35,871 19,797 54,145 i. Temporary Storage Elevation, FMSL: 14.2 13.1 12.8 11.0 j. Predevelopment 1 yr-24 hr. discharge rate, cfs: 0.89 0.45 0.21 0.73 k. Controlling Orifice, inch 0 e: 4.00 2.75 2.50 3.50 I. Orifice Flow Rate, cfs: 0.26 0.12 0.09 0.18 m. PP Volume, ft3: 219,464 93,377 70,586 145,008 n. Forebay Volume, ft3: 42,721 18,946 14,325 31,154 o. Maximum Fountain Horsepower: 3/4 1/3 1/4 1/2 p. Receiving Stream/River Basin: Wallace Creek / White Oak WOK02 Stream Index Number: 19-20 r. Classification of Water Body SB, NSW Page 2 of 12 State Stormwater Management Systems Permit No. SW8 110906 11, The following design criteria have been provided in the infiltration basin and must be maintained at design condition: a. Drainage Area, acres: Onsite, ft2: Offsite, ft2: 1.66 72,310 0 b. Total Impervious Surfaces, ft2: Onsite, ft2: Offsite, ft2 29,621 29,621 0 c. Design Storm, inches: 1.5 d. Basin Depth, feet 3.0 e. Bottom Elevation, FMSL: 24.5 f. Bottom Surface Area, ft2: 2,248 g. Bypass Weir Elevation, FMSL: 26.6 h. Permitted Storage Volume, ft3: 9,460 i. Predevelopment 1 yr-24 hr. discharge rate, cfs: 0.07 j. Type of Soil: Ba meade k. Expected Infiltration Rate, in/hr: 1.295 I. Seasonal High Water Table, FMSL: 22.5 m. Time to Draw Down, hours: 1.7 n. Receiving Stream/River Basin: Wallace Creek / White Oak WOK02 o. Stream Index Number: 19-20 Classification of Water Body: SIB, NSW 12. The following design criteria have been provided in the sand filter and must be maintained at design condition: a. Drainage Area, acres: Onsite, ft2: Offsite, ft2: 5.25 228,690 0 b. Total Impervious Surfaces, ft2: Onsite, ft2: Offsite, ft2: 174,240 174.240 0 c. Design Storm, inches: 1.5 d. Sediment Chamber Bottom Elev. fmsl: 16.0 e. Sediment Chamber Depth, feet: 2.0 f. Sediment Chamber Surface Area, ft2: 4,117.8 Weir Elevation, fmsl: 18.0 h. Sand Chamber Bottom Elev., fmsl: 16.0 i. Sand Chamber Depth, ft: 2.0 j. Sand Media Depth, ft: 1.5 k. Sand Chamber Surface Area, ft2: 4,117.8 I. Maximum Head, feet: 2.6 m. Top of Ponding Elevation, fmsl: 20.6 n. Permitted Storage Volume, ft3: 27,301 o. Predevelopment 1 yr-24 hr. discharge rate, cfs: 0.36 p. Orifice Diameter, inches: 6 q. Orifice Flowrate, cfs: 0.14 r. Time to Draw Down, hours: 25 s. Seasonal High Water Table, fmsl: 11.33 t. Receiving Stream/River Basin. Wallace Creek / White Oak WOK02 u. Stream Index Number: 19-20 v. Classification of Water Body: SIB, NSW Page 3 of 12 State Stormwater Management Systems Permit No. SW8 110906 II. SCHEDULE OF COMPLIANCE The permittee is responsible for verifying that the proposed built -upon area for the entire project does not exceed the maximum allowed by this permit. 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. 3. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 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. 4. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater system function at design condition. The approved Operation and Maintenance Agreement is incorporated by reference into this permit and must be followed in its entirety and maintenance must occur at the scheduled intervals. 5. 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. 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. Decorative spray fountains are allowed in the pond, subject to the following criteria: a. The minimum permanent pool volume is 30,000 cubic feet. b. The fountain must draw its water from less than 2' below the permanent pool surface. C. 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. d. The fountain may not be placed into the forebay. e. The falling water from the fountain must be centered in the main pond, away from the shoreline. f. The maximum horsepower for a fountain in this pond is as listed in Section 1.10 (o) of this permit. The facilities shall be constructed, operated and maintained in accordance with the provisions of this permit, the approved plans and specifications, and the supporting documents attached to this permit and on file with the Division. 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. Access to the stormwater facilities for inspection and maintenance shall be maintained via appropriate recorded easements at all times. Page 4 of 12 State Stormwater Management Systems Permit No. SW8 110906 10. No person or entity, including the permittee, shall alter any component shown in the approved plans and specifications. Prior to the construction of any modification to the approved plans, the permittee shall submit to the Director, and shall have received approval for modified plans, specifications, and calculations including, but not limited to, those listed below. For changes to the project or SCM that impact the certifications, a new or updated certification(s), as applicable, will be required and a copy must be submitted to the appropriate DEQ regional office upon completion of the modification. a. Any modification to the approved plans and specifications, regardless of size including the SCM(s), BUA, details, etc. b. Redesign or addition to the approved amount of BUA or to the drainage area. c. Further development, subdivision, acquisition, lease or sale of any, all or part of the project and/or property area as reported in the approved plans and specifications. d. Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any component of the approved SCM(s), the stormwater collection system and/or vegetative conveyance shown on the approved plan. e. The construction of any allocated future BUA. f. The construction of any permeable pavement, #57 stone area, public trails, or landscaping material to be considered a permeable surface that were not included in the approved plans and specifications. g. Other modifications as determined by the Director. 11. 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. 12. Prior to transfer of the permit, the stormwater facilities will be inspected by Division personnel. The project and the stormwater facility must be in substantial compliance with all permit conditions. Any items not in substantial compliance must be repaired, replaced or restored to design condition prior to the transfer. Records of maintenance activities performed to date will be required. 13. The Base is required to keep track of the approved project limits to assure that the approved low density project area is not double -counted as project area in another low density project located on MCB Camp Lejeune. III. GENERAL CONDITIONS Permit Transfer: This permit is not transferable to any person or entity except after notice to and approval by the Director. The permittee shall submit a completed and signed "Permit Transfer Application Form" (available on the Division website) accompanied by the required fee and supporting documentation as listed on the form, to the Division at least 60 days prior to any one or more of the following events: a. The sale or conveyance of the project area in whole or in part, except in the case of an individual lot sale that is made subject to the recorded deed restrictions and protective covenants; b. Dissolution of the partnership, corporate, or LLC entity, subject to NCGS 55-14-05 or NCGS 57D-6-07 and 08, C. Bankruptcy; d. Foreclosure, subject to the requirements of Session Law 2013-121; 2. Current Permittee Name or Address Changes: The permittee shall submit a completed "Permit Information Update Application Form" (available on the Division website) to the Division within 30 days to making any one or more of the following changes: a. A name change of the current permittee; b. A name change of the project; C. A mailing address change of the permittee; Page 5 of 12 State Stormwater Management Systems Permit No. SW8 110906 3. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Neither the sale of the project in whole or in part, nor the conveyance of common area to a third party constitutes an approved transfer of the stormwater permit. 4. Any individual or entity found to be in noncompliance with the provisions of this storrmwater management permit or the requirements of the Stormwater rules is subject to the enforcement procedures as set forth in G.S. 143 Article 21. 5. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 6. In the event that the facilities fail to perform satisfactorily, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. Additional or replacement stormwater management systems shall receive approval from the Division prior to construction. 7. The permittee grants DEMLR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 8. The permit issued shall continue in force and effect until the permittee files a request with the Division for a permit modification, transfer, renewal, or rescission, however, these actions do not stay any permit conditions. 9. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit for cause as allowed by the laws, rules, and regulations contained in Title 15A of the North Carolina Administrative Code, Subchapter 2H.1000, and North Carolina General Statute 143-215.1 et. al. 10. Approved plans, application, supplements, operation and maintenance agreements, and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of this permit, application, supplements, operation and maintenance agreements, approved plans, and specifications shall be maintained on file by the Permittee at all times. 11. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 12. A permit renewal request must be submitted at least 180 days prior to the expiration date of this permit. The renewal request must include the appropriate application, documentation and the processing fee as outlined in Title 15A NCAC 02H.1045(3). Permit renewed, updated and reissued this the 271" day of August 2020. NORTH CAROLINA ENVI RO N MENTAL MANAGEMENT COMMISSION f Brian Wrenn, Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Page 6 of 12 State Stormwater Management Systems Permit No. SW8 110906 Permit Number SW8 110906 Attachment A 2D Anglico and 2N OPS Complexes Stormwater Permit No. SW8 110906 Onslow County Designer's Certification — Wet Detention Pond(s) I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specifications: Signature Registration Number Date SEAL Page 7 of 12 State Stormwater Management Systems Permit No. SW8 110906 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The outlet structure elevations are per the approved plan. 6. The outlet structure is located per the approved plans. 7. Trash rack is provided on the outlet structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. M The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. Required drawdown devices are correctly sized and located per the approved plans. 13. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. 16. All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDEQ-DEMLR Regional Office Page 8 of 12 State Stormwater Management Systems Permit No. SW8 110906 2D Anglico and 2N OPS Complexes Stormwater Permit No. SW8 110906 Onslow County Designer's Certification — Infiltration Basin I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 9 of 12 State Stormwater Management Systems Permit No. SW8 110906 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The bypass structure weir elevation is per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. cc: NCDEQ-DEMLR Wilmington Regional Office Page 10 of 12 State Stormwater Management Systems Permit No. SW8 110906 2D Anglico and 2N OPS Complexes Stormwater Permit No. SW8 110906 Onslow County Designer's Certification — Sand Filter I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form are a part of this Certification. Noted deviations from approved plans and specifications: Signature Registration Number Date SEAL Page 11 of 12 State Stormwater Management Systems Permit No. SW8 110906 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The sand filter elevations are per the approved plan. 6. The sand filter is located per the approved plans. 7. A trash rack is provided on the outlet/bypass structure. 8. For open sand filters, all slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. Required drawdown devices are correctly sized and located per the approved plans. 13. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, a forebay, and the vegetated filter. 15. The required dimensions of the system are provided, per the approved plan. cc: NCDEQ-DEMLR Regional Office Page 12 of 12 1. Operation & Maintenance Aareement I Project Name Project Location 2nd Radio Battalion Operations Complex Consolidation MCB Camp Lejeune, NC maintenance recoras snau oe Kept on the roiiowing bmv(s). i nis maintenance recora snau oe Kept in a iog in a Known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s). The BMP(s) on this project include (check all that apply & corres onding O& Bioretention Cell Quantil F-29 Dry Detention Basin Quantity: Grassed Swale Quantity: Green Roof Quantity: Infiltration Basin Quantity: Infiltration Trench Quantity: Level SpreaderNFS 'Quantity: Permeable Pavement Quantity: Proprietary System Quantity: Rainwater Harvesting Quantity: Sand Filter Quantity: Stormwater Wetland Quantity: Wet Detention Basin Quantity: Disconnected Impervious Area Present: User Defined BMP Present: I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to the system or responsible party. Cour pers, ackn W itn Responsible Party: Title & Organization: Street address: City, state, zip: Phone number(s): Email: It. Nolory Public Onslow C6unty Commission Expin 05/26/2019 O� HCAR0\; Thomas Bradshaw Public Works Civil Engineering 1005 Michael Road Camp Le'eune, NC 28547 910-451-3238 thomas.bradshaw@usmc.mil ECEIVE FEB 10 2017 BY: Version 1.4 My commission expires 3lohlrhdl 2/6/2017 Page 1 of 6 oi:.tUS •; 1:17p:4 vinwoJ \vot<nC; npa:in:ao- Y7:l \?(OStu;tc0 ll ) `�ot. 'i ri i,i • 1 Grassed Swale Maintenance Requirements I Important maintenance procedures: The drainage area of the grassed swale will be carefully managed to reduce the sediment load to the grassed swale. After the first-time fertilization to establish the grass in the swale, fertilizer will not be applied to the grassed swale. The grassed swale will be inspected once a quarter. Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How to remediate the problem: The perimeter of the BMP Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then plant a erosive gullies have formed. ground cover and water until it is established. Provide lime and a one- time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of approximately six inches. long. The entire length of the Trash/debris is present. Remove the trash/debris. swale Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then re -sod (or erosive gullies have formed. plant with other appropriate species) and water until established. Provide lime and a one-time fertilizer application. Sediment covers the grass at Remove sediment and dispose in an area that will not impact streams the bottom of the swale. or BMPs. Re -sod if necessary. Vegetation is too short or too Maintain vegetation at a height of approximately six inches. long. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Department of Environment and Natural damage have occurred at the Resources Regional Office. outlet. rFGEB EIVE 10 2017 BY: STORM-EZ 2/6/2017 Version 1.4 0&M Manual Page 3 of 6 The drainage area will be carefully managed to reduce The sediment load to The infiltration basin. Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the vegetation. The vegetation in and around the basin will be maintained at a height of approximately six inches. After the infiltration basin is established, it shall be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance shall be kept in a known set location and shall be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How to remediate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then plant a infiltration basin erosive gullies have formed. ground cover and water until it is established. Provide lime and a one- time fertilizer application. The inlet device: pipe or The pipe is clogged (if Unclog the pipe. Dispose of the sediment off -site. swale applicable). The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to smooth it over and provide erosion swale (if applicable). control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated Search for the source of the sediment and remedy the problem if and reduced the depth to 75% possible. Remove the sediment and dispose of it in a location where it of the original design depth. will not cause impacts to streams or the BMP. Erosion has occurred or Provide additional erosion protection such as reinforced turf matting or riprap is displaced. riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather than spraying. The main treatment area A visible layer of sediment Search for the source of the sediment and remedy the problem if has accumulated. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Replace any media that was removed in the process. Revegetate disturbed areas immediately. Water is standing more than Replace the top few inches of filter media and see if this corrects the 5 days after a storm event. standing water problem. If so, revegetate immediately. If not, consult an appropriate professional for a more extensive repair. Weeds and noxious plants Remove the plants by hand or by wiping them with pesticide (do not are growing in the main spray). treatment area. The embankment Shrubs or trees have started Remove shrubs or trees immediately. to grow on the embankment. i E G E I E ®9 An annual inspection by an appropriate professional Make all needed repairs. FEB 10 2017 shows that the embankment needs repair. gy; The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. STORM-EZ 2/6/2017 Version 1.4 O&M Manual Page 4 of 6 The receiving water Erosion or other signs of Contact the local NC Department of Environment and Natural damage have occurred at the Resources Regional Office. outlet. EVEI V E FEB 10 2017 i BY: STORM-EZ 2/6/2017 Version 1.4 O&M Manual Page 5 of 6 t Sand Filter Maintenance Requirements I Important maintenance procedures: - The drainage area will be carefully managed to reduce the sediment load to the sand filter. The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds six inches. Once a year, sand media will be skimmed. The sand filter media will be replaced whenever it fails to function properly after maintenance. The sand filter shall be inspected quarterly and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How to remediate the problem: Entire BMP Trash/debris is present. Remove the trash/debris. Adjacent pavement (if Sediment is present on the Sweep or vacuum the sediment as soon as possible. applicable) pavement surface. Perimeter of sand filter Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then plant a erosive gullies have formed. ground cover and water until it is established. Provide lime and a one- time fertilizer application. Vegetation is too short or too Maintain vegetation at an appropriate height. long. Flow diversion structure The structure is clogged. Unclog the conveyance and dispose of any sediment offsite. The structure is damaged. Make any necessary repairs or replace if damage is too large for repair. The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to smooth it over and provide erosion swale. control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and replace with clean stone. covered in sediment (if applicable). Forebay or pretreatment Sediment has accumulated to Search for the source of the sediment and remedy the problem if area a depth of greater than six possible. Remove the sediment and stabilize or dispose of it in a inches. 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 a pesticide is used, wipe it on the plants rather than spraying. Filter bed and underdrain Water is ponding on the Check to see if the collector system is clogged and flush if necessary. collection system surface for more than 24 If water still ponds, remove the top few inches of filter bed media and hours after a storm. replace. If water still ponds, then consult an expert. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Department of Environment and Natural damage have occurred at the outlet. Resources Regional Office. EGERVER STORM-EZ Version 1.4 FEB 10 2017 IV 2/6/2017 Page 6 of 6 O&M Manual Permit Number: J`Ily (to be provided by DWQ) Drainage Area Number: 4 Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate 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 time and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 APR u 9 ZGIZ Page 1 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: - Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion 2roblems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form SW401-Wet Detention Basin O&M-Rev.4 APR U 9 2012 Page 2 of 4 ti Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of ' damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 5 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM ill in the blanks) Permanent Pool Elevation 13 Sediment Removal . a 1 Pe anen Pool --------------- -- Volume -- - Sediment Removal Elevation 8 I Volume ft Bottom Elevati0 7 Min. -------------_------ Sediment- Bottom Elevation 7 2 1-ft Storage Sedimer Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 APR u 9 2012 Page 3 of 4 I Permit Number: (to be provided by DIVQ) I acknowledge and agree by my signature below that 1 am responsible for the performance of the maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:,Un BiVfP drainage area number:A Print name: Title:Deputy Public Works Officer Address:BLDG 1005 MICHAEL ROAD MCB CAMP LEJEUNE NC 28547 Note: The legally responsible party should not be a homeowners association unless more than 50%of the lots have been sold and a resident of the subdivision has been named the president. I, V 1 D-./ I V 017 r( S a Notary Public for the State of Op i l�b(O\ tyC , County of OA S1 o vJ do hereby certify that Cw- personally appeared before me this J� day of Yftx C�, .�o (JL, and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SYLVIA NORRIS NOTARY PUBLIC ONSLOW COUNTY MY COMMISSION EXPIRESI SEAL My commission expires�J�} �a15 Form SW401-Wet Detention Basin O&M-Rev.4 APR U 9 2012 j Page 4 of 4 i• Permit Number. (to be provided by DWO) Drainage Area Number:___ Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flush ng of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate 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. Vegetation is too short or too Maintain vegetation at a height of long. I approximately six inches. Form S W401-Wet Detention Basin O&M-Rev.4 APR 0 9 2w I Page I of 4 Permit Number: (to be provided by DWO) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated,to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion 2roblerns. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form SW40I-Wet Detention Basin O&M-Rev.4 APR 9 ZOIY Page 2 of 4 1�C1. Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged I Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 4 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 12 Sediment Removaltioi Pe anen Pool ---------- -- Volume Sediment Removal Elevation 8 Volume Bottom Elew-ft Min. ------- - ------------------------------------ ----�-�-� Sediment Bottom Elevation 7 2 1-ft �vPn Storage Sedimer Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 APR u 9 Z01Z Page 3 of 4 _-__-J Permit Number: (to be provided by DVFQ) 1 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:, A IC6 G nc� �N RN ob Ccmplex Ca BMP drainage area number: Print Title:Deputy Public Works Officer Address:BLDG 1005 MICHAEL ROAD MCB CAMP LEJEUNE NC 28547 Date: 3 - 15 fl- 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. a Notary Public for the State of o o Cod Ira- County of C) l S(13W do hereby certify that C 4 0 I�11Q%W personally appeared before me this I Z day of rnq(' Ct� AD!1-, and acknowledge the due execution of the forgoing wet .detention - basin �maintenance requirements. Witness my hand and official seal, SYLVIA NORRIS NOTARY PUBLIC ONSLOW COUNTY MY COMMISSION EXPIRES A-el5 SEAL My commission expires �yIS Form SW401-Wet Detention Basin O&M-Rev.4 All u 9 2012 Page 4 of 4 ii Permit Number: _��/ (Io be provided by DWQ) Drainage Area Number: C Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay. Important maintenance procedures: - Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). - No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. - Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. - If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. - Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate 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. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 APR U 9 2U1Z Page I of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than s ra in . The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form SW401-Wet Detention Basin O&M-Rev.4 APR U 7 9 2012 Page 2 of 4 I Permit Number: (to be provided by D6VQ) Drainage Area Number: BMP element: Potentialproblem: How 1 will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged or replace the outlet device. The receiving water Erosion or other signs of -Repair Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 4 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 12 Sediment Removalvi2 Pe manen Pool ---- Volume Sediment Removal Elevation 8 Volume Bottom Eleva-ft Min. ------------- ------ Sediment Bottom Elevation 7 I 1-ft n Storage Sedimer Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 APR U 9 l01l Page 3 of 4 N Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that 1 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: q0 Nr\+ck �1_ aN 1W cos <ouk,xes BMP drainage area number: Print Title:Deputy Public Works Officer Address:BLDG 1005 MICHAEL ROAD MCB CAMP LEJEUNE NC 28547 Date: 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. a Notary Public for the State of '4ZC+JN Ubd ck i r12t County of U V151 o W do hereby certify that �t C p,( \ (� 0, 4ye� personally appeared before me this LECh day of IVNaf C h , cep I a, and acknowledge the due execution of the forgoing detention basin maintenance requirements. Witness my hand and official seal, LjLqW'.)'i14AAA_�) SYLVIA NORRIS NOTARY PUBLIC ONSLOW COUNTY MY COMMISSION EXPIRES (5 SEAL My commission expires `RYA .n 01J Form SW40I-Wet Detention Basin O&NI-Rev.4 APR U 9 ZO1Z Page 4 of 4 Permit Number: (to be provided by DWO) Drainage Area Number: f) Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a IForebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate 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. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW40I-Wet Detention Basin O&M-Rev.4 APR 0 9 Z01Z Page 1 of 4 /-10 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than s ra in . The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form SW40I-Wet Detention Basin O&M-Rev.4 APR u 9 Z012 Page 2 of 4 Permit Number: (to be provided by DWO) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged I Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 4 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM ill in the blanks) Permanent Pool Elevation 10 Sediment Removal .6 Pe anen Pool ----------------- Volume Sediment Removal Elevation 6 I Volume Bottom Elevatio_------ Sediment Bottom Elevation 5 1-ft r Storage Sedime� Storage FOREBAY MAIN POND r -- APR U 9 zuiz Form SW401-Wet Detention Basin O&M-Rev.4 � Page 3 of 4 . if Permit Number: (to be provided by DWQ) 1 acknowledge and agree b - my signature below that I am responsible for the performance of the mai, ., ce procedures listed above. I agree to notify DWQ of any problems with the s;s`iem or prior to any changes to the system or responsible party. Project name::-aD. I�n�`ict oA ANAN, CPS Lr�le (eJ BMP drainage area number: Print name:Carl Baker 'ritle:Deputy Public Works Officer Address:BLDG 1005 MICHAEL ROAD MCB CAMP LEJEUNE NC 28547 Signature: Date: 3 ^ 1$$— /2 Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I, ��1� �U 1 C� ^7 Orr / ' a Notary Public for the State of f`'b a(CA t (\aJ , County of OAS(OW do hereby certify that /� 1 1. a-f 1, Z10.K`e*— personally appeared before me this �5 day of )ry) A f LN 4010--. and acknowledge the due execution of the forgoing et�basin maintenance requirements. Witness my hand and official seal, SYLVIA NORRIS NOTARY PUBLIC ONSLOW COUNTY MY COMMISSION EXPIRES) a15 SEAL My commission expires Form SW401-Wet Detention Basin O&M-Rev.4 I APR U 9 Z01Z i Page 4 of 4 - r. I DEMLR USE ONLY Date eceived Fee Paid Permit Number OS-U& 1109 Oto 4 505 '= Sri 9 //�J 9�(� - r `e1=r1 NC DEQ Division of Energy, Mineral and Land Resources STATE STORMWATER: PERMIT RENEWAL APPLICATION FORM In accordance with 15A NCAC 2H.1045(3), the current permit holder shall renew their high density permit 180 days prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781) Section 60.(c). This application form is for permit renewals only. A. PROJECT INFORMATION 1. State Stormwater Permit Number: SW8 110906 2. Project name: 2d Anglico and 2D OPS Complex 3. Project street address: XXX City: MCB Camp Leieune County: Onslow ZIP: 28542 4. What, if any, changes have been made to the project as permitted? If the project has changed from the original approved plans, please complete SWU-101 for a Major Modification or Minor Modification Application form available at: https://deg.nc.gov/about/divisions/energy- m ineral-land-resou rces/ene rgy-mineral-land-rules/stormwater-program/post-construction. B. PERMITTEE INFORMATION If changes to the permittee or project name have been made, please complete either the Permit Update form or the Permit Transfer form available at: httos://dea.nc.aov/about/divisions/enerov-mineral-land- State Stormwater Permits do not automatically transfer with the sale of the property. 1. Current Permit Holder's Company Name/Organization: MCB Camp Leieune 2. Signing Official's Name: Neal Paul 3. Signing Official's Title: Deputy Public Works Division 4. Mailing Address: MCB Camp Lejeune 1005 Michael Rd. City: MCB Camp Leieune State: NC ZIP : 28547-2521 5. Street Address: City: State: ZIP 6. Phone: (910) 451-2213 Email: neal.paul@usmc.mil fit Stormwater Permit Renewal Form Page 1 of 3 ,May 11, 2018 w C. , SUBMITTAL REQUIREMENTS Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW). Only applications packages that include all required items listed below will be accepted and reviewed. Initial item below to indicate that the required information is provided in the application package: k4llp//A permit application processing fee of $505.00 payable to NCDEQ. / 2. One original signed hard copy and one electronic copy of this completed form. The signing official named on this application to represent the current permittee must meet one of the following: a. Corporation — a principle executive officer of at least the level of vice-president; b. Limited Liability Company (LLC) — a manager or company official as those terms are defined in G.S. 57D "North Carolina Limited Liability Company Act;" c. Public Entity — a principal executive officer, ranking official, or other duly authorized employee; d. Partnership or limited partnership — the general partner; e. Sole proprietor; or f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity - 3.One hard copy and one electronic copy of recorded documents required by the original permit that have not yet been received by DEMLR, including: deed restrictions, protective covenants, condominium/planned community declaration and easements. If the project has been built, include documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If the project has not been built, include a signed agreement that the final recorded deed restrictions /�L� and protective covenants will be submitted at a later date. / 4. O&M Agreements, Please select one: ® 1 have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to keep this on file with the permit; or ❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a copy be sent to me. I agree to keep this on file with the permit. 5. Designer Certifications, Please select one: ® A copy of the certification(s) confirming that the project was built in accordance with the approved plans have been previously provided to the Division; or ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans are enclosed; or ❑ The project has not yet been built. 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a signed, sealed, and dated letter from a licensed professional stating that the SCMs have been inspected, and that they have been built and maintained in accordance with the permit. 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide one hard copy and one electronic copy of documentation from the NC Secretary of State, or other official documentation, which supports the titles and positions held by the persons listed in Section C.2 per 15A NCAC 2H. 1043(3)(b). https://www.sosnc.gov/online services/search/by title/ Business Registration ECE" JUN 022020 BY: Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018 T , D. G'ERMITTEE'S CERTIFJCATION I,. �at^� I� (�O &ykL' OL' - the person legally responsible for the permit, certify that I have a copy of the Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am responsible for the performance of the maintenance procedures, and the site has been and will be maintained according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs or built -upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my knowledge, correct and complete Signature: / Date: ' 2l NOTARI ATION: ; I, ` a Notary Public for the State of T-)Q'- County ofdo hereby certify that personally appeared before me this the ;!�k day of 20 and acknowledge the due aamnnn,,,.. _ agtiorSA}IWrgoing instrument. Witness my hand and official seal, pvsuc -- w COUN f - L ' My cbmmis'S'%n expires M 0�10 . JUN 0 2 2020 BY Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 :'f r: ifs �)C �. n �: �� t1. {.. ".i� . !'. �7 '� � a ,� �tlU i, I, �' �4U n.0 T. D., PERMITTEE'S CERTIFICATION I, U!G the person legally responsible for the permit, certify that I have a copy of the Permit and O& Agreement on site (or I will obtain a copy and it will be kept on site), that I am responsible for the performance of the maintenance procedures, and the site has been and will be maintained according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs or built -upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the project, SCMs, or ownership. All 'nformation provided on this permit renewal application is, to the best of my knowledge, correct and 9t. Signature: Date: 3 �v NOT that %r I ty/1aE4 this the Q execution ofilltY im"1ntv'Asti NOTgR), Notary My Comm County of h y of , lent. Witness my hand and official seal, a Notary Public for the State of do hereby certify personally appeared before me 20_Z6 and acknowledge the due ;L_ .^ f, &' JUN O y ?�0 :. •:. E5 Slormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 1 gN:B.�pbe:q �, �.�,i�.i t.�i ��. J!...'� O ` ♦ �, 1, L �1. � • ��?, it Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FO IVE LOW DENSITY SUPPLEMENT JAN 2 3 2013 This form may be photocopied for use as an original BY: A low density project is one that meets the appropriate criteria for built upon area and transports stormwater runoff primarily through vegetated conveyances. Low density projects should not have a discrete stormwater collection system as defined by 15A NCAC 2H .1002(18). Low density requirements and density factors can be found in Session Law 2008-211, 15A NCAC 2H .1000, Session Law 2006-246. and the DWQ BMP Manual. Curb and gutter systems are allowed provided they meet the requirements in 15A NCAC 2H .1008(g). L PROJECT INFORMATION Project Name: 2D ANGLICO AND 2N BN OPS COMPLEXES Contact Person: Howard Resnik. PE Phone Number: ( 910 )791-4441 Number of Lots:1 Allowable Built Upon Area (BUA) Per Lot*:1.571.386 Number of Dwelling Units Per Acre**: Low Density Development (check one): ® without curb & gutter ❑ with curb & gutter, outlets to (check one): ❑ Swales ❑ Vegetated Area *If lot sizes are not uniform, attach a table indicating the number of lots, lot sizes and allowable built upon area for each lot. The attachment must include the project name, phase, page numbers and provide area subtotals and totals. BUA shall be shown in units of square feet. **(Phase II Post -Construction (non -SA) only) II. BUILT UPON AREA Refer to DWQ's forms and applications website for specific language that must be recorded in the deed restrictions for all subdivided' projects. (http://h2o.enr.state.nc.us/su/bmp_fonns.htm) Complete the following calculation in the space provided below where: • SA Site Area - the total project area above Mean High Water. • DF Density Factor - the appropriate percent built upon area divided by 100. • RA Road Area - the total impervious surface occupied by roadways. • CA Other Area - the total area of impervious surfaces such as clubhouses, tennis courts, sidewalks, etc. • No. of Lots - the total number of lots in the subdivision. • BUA per Lot - the computed allowable built upon area for each lot including driveways and impervious surfaces located between the front lot line and the edge of pavement. • Total allowable lot BUA - the computed allowable built upon area for all lots combined. • Total BUA from lot listing - the sum of built upon area allocated for each lot on the list of non -uniform lots. Form SW401-Low Density-Rev3-2/10/09 Page 1 of 4 Calculation: uniform lot sizes: (No of Lots: 1) For non -uniform lot sizes: a. (SA: ft2 x DF: ) — (RA b. Total BUA from lot listing: 111. DESIGN INFORMATION — (OA: ft2) = BUA per Lot=1,571.386 ft' ft') — (OA: ft') = Total allowable lot BUA = ft' sf. b must be <.a Complete the following table. If additional space is needed the information should be provided in the same format as Table. I and attached to this form. Rainfall intensity data can be found in Appendix 8.03 of the State of North Carolina Erosion and Sediment Control Planning and Design Manual or at http:/ihdsc.nws.noaa.gov/hdsc/pfds/ Table 1. Swale design information based on the 10-vear storm. Swale No. Drainage Area (ac) Impervious Area (ac) Grassed Area (ac) C Q (cfs) Slope (%) Vaiiow (fps) Vactual (fps) Flow Depth (ft) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 (iEa� � l 19 pnpkk R 14 Np 20 Form SW401-Low Density-Rev.3-2/10/09 Page 2 of 4 IV. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the North Carolina Administrative Code Section 15A NCAC 21-1.1000, NCDENR BMP Manual (2007), Session Law 2006-246, and Session Law 2008-211. Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate that the following requirements have been met and supporting documentation is provided as necessary. If the applicant has designated an agent on the Stormwater Management Permit Application Form, the agent may initial below. If any item is not met, then justification must be attached. Only complete items n througli p for projects with curb outlets. Page/Plan Initials Sheet No. 1� ( C io \ a. t For projects in the 20 coastal counties: Per NCAC 2H.1005, a 50 foot wide vegetative buffer is provided adjacent to surface waters. For Redevelopment projects, a 30' wide vegetative buffer adjacent surface waters is provided. Le =1u\ b. t For HQW or ORW projects outside the 20 coastal counties: A 30 foot wide vegetative buffer is provided adjacent to surface waters. C. t For Phase 11 Post -Construction projects: All built upon area is located at least 30 feet landward of all perennial and intermittent surface waters. fit( t� Mk d. Deed restriction language as required on form SWU-101 shall be recorded as a restrictive covenant. A copy of the recorded document shall be provided to DWQ within 30 days of platting and prior to the sale of any lots. u1A. CL, e. Built upon area calculations are provided for the overall project and all lots. A,Q, NI R f Project conforms to low density requirements within the ORW AEC. (if applicable per 15A NCAC 2H .1007) 11,A, CEIZb g. Side slopes of swales are no steeper than 3:1; or no steeper than 5:1 for curb outlet swales. �i g Ct ON4. Longitudinal slope of swales is no greater than 5%; for non -curb outlet projects, calculations for shear stress and velocity are provided if slope is greater than 5%. ud, L\(�,_ i. At a minimum, swales are designed to carry the 10 year storm velocity at a non -erosive rate. kit, Cw\ci j. Swales discharging to wetlands are designed to flow into and through the wetlands at a non - erosive velocity (for this flow requirement into wetlands, non -erosive is velocity < 2 ft/s). k. Swale detail and permanent vegetation is specified on the plans. _ CC,56S I. Swale detail provided on plans; includes grass type(s) for permanent vegetative cover. . kit, W It m. Swales are located in recorded drainage easements. N!.L (VII' n.tt Length of swale or vegetated area is at least 100 feet for each curb outlet. 1L t , N) k o tt The system takes into account the run-off at ultimate built -out potential from all surfaces draining to the system (delineate drainage area for each Swale). NIA . p tt Curb outlets direct flow to a swale or vegetated area. ������� t Projects'in the Neuse, Tar -Pamlico, Catawba River basins, and Randleman Lake may regt re add gpal but tt Only complete these items for projects with curb outlets. JAP1 ( J Form SW401-Low Density-Rev.3-2/10/09 Page 3 of 4 SWALE SYSTEM MAINTENANCE REQUIREMENTS Mowing will be accomplished as needed according to the season. Grass height will'not exceed six inches at any time; and grass will not be mowed too close to the ground or "scalped". Swales will be inspected monthly or after every runoff producing rainfall event for sediment build-up, erosion, and trash accumulation. Accumulated sediment and trash will be removed as necessary. Swales will be reseeded or sodded following sediment removal. Eroded areas of the swales will be'repaired and reseeded. Swales will be revegetated as needed and in a timely manner based on the monthly inspections. Side slopes must be maintained at the permitted slope. Catch basins, curb cuts, velocity reduction devices, and piping will be inspected monthly or after every significant runoff producing rainfall event. Trash and debris will be cleared away from grates, curb cuts, velocity reduction devices and piping. 6. Swales will not be altered, piped, or filled in without approval from NCDENR Division of Water Quality. I acknowledge and agree by my signature below that I am responsible for the performance of the six 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 and Title:Neal Paul. Deputy Public Works Officer Phone Signature: Note: The legally res resident of the day of Date: not be a homeowners association unless more than 50% of the lots have been sold and a has been named the president. do he by certify tlfa �0 �� , and and official State of UYW I, County of appeared before me this 1-0 the due execution of the forgoing Swale maintenance requirements. F—CF—BVE JAN 2 3 202 BY: KELLEY VANDECOEVERING . SEAQTARY PUBLIC My commission expires ONSLOW COUNTY STATE OF NORTH CAROLINA Form SW401-Low Density-Rev3-2/10/09 Page 4 of 4 Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM LOW DENSITY SUPPLEMENT This form may be photocopied for use as an original A low density project is one that meets the appropriate criteria for built upon area and transports stormwater runoff primarily through vegetated conveyances. Low density projects should not have a discrete stormwater collection system as defined by 15A NCAC 2H .1002(18). Low density requirements and density factors can be found in Session Law 2008-211, 15A NCAC 2H .1000, Session Law 2006-246, and the DWQ BMP Manual. Curb and gutter systems are allowed provided they meet the requirements in 15A NCAC 2H .1008(g). I. PROJECT INFORMATION Project Name: 2D ANGLICO AND 2N BN OPS COMPLEXES Contact Person: Howard Resnik, PE Phone Number: ( 910 )791-4441 Number of Lots:I Allowable Built Upon Area (BUA) Per Lot*:1,575,885 Number of Dwelling Units Per Acre**: Low Density Development (check one): ® without curb & gutter ❑ with curb & gutter, outlets to (check one): ❑ Swales ❑ Vegetated Area *If lot sizes are not uniform, attach a table indicating the number of lots, lot sizes and allowable built upon area for each lot. The attachment must include the project name, phase, page numbers and provide area subtotals and totals. BUA shall be shown in units of square feet. **(Phase 11 Post -Construction (non -SA) only) II. BUILT UPON AREA Refer to DWQ's forms and applications website for specific language that must be recorded in the deed restrictions for all subdivided projects. (http://h2o.enr.state.nc.us/su/bmp_fonns.htm) Complete the following calculation in the space provided below where: • SA Site Area - the total project area above Mean High Water. • DF Density Factor - the appropriate percent built upon area divided by 100. • RA Road Area - the total impervious surface occupied by roadways. • OA Other Area - the total area of impervious surfaces such as clubhouses, tennis courts, sidewalks, etc. • No. of Lots - the total number of lots in the subdivision. • BUA per Lot - the computed allowable built upon area for each lot including driveways and impervious surfaces located between the front lot line and the edge of pavement. • Total allowable lot BUA - the computed allowable built upon area for all lots combined. • Total BUA from lot listing - the sum of built upon area allocated for each lot on the list of non -uniform lots. Form SW40I-Low Density-Rev.3-2/10/09 Page 1 of 4 i I APR 0 9 201Z Calculation: For uniform lot sizes: (SA: 6,566,187 ft2 x DF:.24)—(RA: ft')—(OA: ft') = BUA per Lot = 1,575,885 ft2 (No of Lots: 1) For non -uniform lot sizes: a. (SA: ft x DF: ) — (RA: ft2) — (OA: ft2) = Total allowable lot BUA = ft2 b. Total BUA from lot listing: sf. b must be < a 11I. DESIGN INFORMATION Complete the following table. If additional space is needed the information should be provided in the same format as Table I and attached to this form. Rainfall intensity data can be found in Appendix 8.03 of the State of North Carolina Erosion and Sediment Control Planning and Design Manual or at http://hdsc.nws.noaa.gov/hdsc/pfds/ Table 1. Swale desien information based on the 10-vear storm. Swale No. Drainage Area (ac) Impervious Area (ac) Grassed Area (ac) C Q (cfs) Slope (%) Vaiiom, (fps) Vactual (fps) Flow Depth (ft) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Form SW401-Low Density-Rev3-2/10/09 Page 2 of 4 APR 0 9 Z01Z IV. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the North Carolina Administrative Code Section 15A NCAC 2H .1000, NCDENR BMP Manual (2007), Session Law 2006-246, and Session Law 2008-21 1. Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate that the following requirements have been met and supporting documentation is provided as necessary. If the applicant has designated an agent on the Stormwater Management Permit Application Form, the agent may initial below. If anv item is not met, then justification must be attached. Only complete items n through p for projects with curb outlets. Page/Plan Initials Sheet No. CE Id a. t For projects in the 20 coastal counties: Per NCAC 2H.1005, a 50 foot wide vegetative buffer is provided adjacent to surface waters. For Redevelopment projects, a 30' wide vegetative buffer adjacent surface waters is provided. CE M b. t For HQW or ORW projects outside the 20 coastal counties: A 30 foot wide vegetative buffer is provided adjacent to surface waters. NIA- C. t For Phase II Post -Construction projects: All built upon area is located at least 30 feet landward of all perennial and intermittent surface waters. r✓I Pr d. Deed restriction language as required on form SWU-101 shall be recorded as a restrictive covenant. A copy of the recorded document shall be provided to DWQ within 30 days of platting and prior to the sale of any lots. c IN is e. Built upon area calculations are provided for the overall project and all lots. yl fti £ Project conforms to low density requirements within the ORW AEC. (if applicable per 15A NCAC 2H .1007) CES�S g. Side slopes of swales are no steeper than 3:1; or no steeper than 5:1 for curb outlet swales. •aC W-Kr h. Longitudinal slope of swales is no greater than 5%; for non -curb outlet projects, calculations for shear stress and velocity are provided if slope is greater than 5%. .Irs i. At a minimum, swales are designed to carry the 10 year storm velocity at a non -erosive rate. rut t j. Swales discharging to wetlands are designed to flow into and through the wetlands at a non - erosive velocity (for this flow requirement into wetlands, non -erosive is velocity < 2 ft/s). C:ESOS k. Swale detail and permanent vegetation is specified on the plans. C_ESos' 1. Swale detail provided on plans; includes grass type(s) for permanent vegetative cover. rvl m. Swales are located in recorded drainage easements. n.tt Length of swale or vegetated area is at least 100 feet for each curb outlet. o.tt The system takes into account the run-off at ultimate built -out potential from all surfaces draining to the system (delineate drainage area for each swale). p tt Curb outlets direct flow to a swale or vegetated area. t Projects in the Neuse, Tar -Pamlico, Catawba River basins, and Randleman Lake may require additional buffers. tt Only complete these items for projects with curb outlets. Form SW40I-Low Density-Rev.3-2/10/09 Page 3 of 4 APR 0 9 Z01Z V. SWALE SYSTEM MAINTENANCE REQUIREMENTS Mowing will be accomplished as needed according to the season. Grass height will not exceed six inches at any time; and grass will not be mowed too close to the ground or "scalped". 2. Swales will be inspected monthly or after every runoff producing rainfall event for sediment build-up, erosion, and trash accumulation. Accumulated sediment and trash will be removed as necessary. Swales will be reseeded or sodded following sediment removal. 4. Eroded areas of the Swales will be repaired and reseeded. Swales will be revegetated as needed and in a timely manner based on the monthly inspections. Side slopes must be maintained at the permitted slope. Catch basins, curb cuts, velocity reduction devices, and piping will be inspected monthly or after every significant runoff producing rainfall event. Trash and debris will be cleared away from grates, curb cuts, velocity reduction devices and piping. 6. Swales will not be altered; piped, or filled in without approval from NCDENR Division of Water Quality. I acknowledge and agree by my signature below that 1 am responsible for the performance of the six maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: (, i ( H. aCl/ 04uia /'V MI.o Llar-ks 0-X, ,er- Address (005 &_Iliael RJ Caao LGiGaN eEE. G Zg!"/z Phone: *0 — U 213' I J Date: Signature: two i 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. �� ji /� L �Y (V i 0.] b f f 13 , a Notary Public for the State o 0!"Is, LUJ )Nn County of � r% S( I)w , do hereby certify that C 4r I H- Q� N(-e.� . personally appeared before me this day of 1 r, WCLl fL , 9,0 1 9-- , and acknowledge the due execution of the forgoing swale maintenance requirements. Witness my hand and official seal, r Notary si ture SYLVIA NORRIS NOTARY PUBLIC ONSLOW COUNTY MY9W"l SION EXPIRES My commission expires 3 0,, 4` a(5 Form SW401-Low Density-Rev.3-2/10/09 Page 4 of 4 I APR U 9 2012 1- r. Permit No. " 1 I v/ V (n (lobe provided by DWO) IN I D EN `r NCDER STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION Project name 2nd Radio Bn Contact person Thomas Bradshaw, Public Works GNI Engineering Phone number 910-451-3238 Date 2l012OI7 Drainage area number Existing Wet Pond II. DESIGN INFORMATION Site Characteristics Drainage area 1,019,945 f? Impervious area, post -development 627,687 ffe %impervious 61.54 h Design rainfall depth 2.4 in Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SAWaters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr much Minimum volume required Volume provided Peak Flow Calculations Is the preipost control of the lyr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the perm. pool elevation) Top of 1 Oft 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 addi8onal volume stored above the state -required temp. pool? Elevation of the top of the additional volume 76,894 fie 76,991 fte OK, volume provided is equal to or in excess of volume required. ff' C A to ff,EAL W9121_ � B••.(C ZlJo�t�Q�: ��� :�P/q y (YorN) vGINE•'����� 3.8 in 0.30 (unitless) (unitless) inlhr 42.23 fO/sec ft'tsec fe/sec [� ��//-''ee ®�{�--• E G E I `°' IE 14.20 fmsl 13.00 fmsl 9.90 frost FES 1 2011 13.50 fmsl 12.50 trust 8.00 frost BY: 7.00 frost 1.00 If N (Y or N) 14.2 fmsl OK Form SW401-Wet Detention Basin-Rev.9-4/16/12 Parts I. a It. Design Summary, Page 1 of 2 Permit (to be provided by DWO) II. DESIGN INFORMATION Surface Areas Area, temporary pool 67,603 fit' Area REQUIRED, permanent pool 54,771 ft' SAIDA ratio 5.37 (unitless) Area PROVIDED, permanent pool, Are,,,yrm 57,953 f? OK Area, bottom of 10ft vegetated shelf, A,,i 51,333 ft Area, sediment cleanout, top elevation (bottom of pond), A,,. 34,242 f? Volumes Volume, temporary pool 76,991 ft' OK Volume, permanent pool, Vr,m,-rra 219,646 ft' Volume, forebay (sum of forebays if more than one forebay) 42,721 fin Forebay % of permanent pool volume 19.4r/ % OK SAIDA Table Data Design TSS removal 90 % Coastal SAIDA Table Used? Y (Y or N) Mountain/Piedmont SAIDA Table Used? N (Y or N) SAIDA ratio 5.37 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) (Y or N) Volume, permanent pool, V. 219,646 ft' Area provided, permanent pool, Ar�nm, 57,953 f? Average depth calculated If Need 3 fit min. Average depth used in SAIDA, d.„, (Round to nearest 0.5ft) It Calculation option 2 used? (See Figure 10-2b) (Y or N) Area provided, permanent pool, Ar,,,,., 57,953 ft' Area, bottom of 1 Oft vegetated shelf, A.„„ n 51,333 fir Area, sediment cleanout, top elevation (bottom of pond), Arrty,,,d 34,242 f? "Depth" (distance brw bottom of 1 Oft shelf and top of sediment) 4.50 It Average depth calculated 4.22 it OK Average depth used in SAIDA, dr, (Round to down to nearest 0.5ft) 4.0 ft OK Drawdown Calculations Drawdown through orifice? Diameter of orifice (if circular) Area of orifice (if -non -circular) Coefficient of discharge (Co) Driving head (Hr) Drawdown through weir? Weir type Coefficient of discharge C.) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width ratio Length to width ratio Trash rack for overflow & orifice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all runoff at ultimate buildrf-out? Drain mechanism for maintenance or emergencies is: Y (Y or N) 4.00 in in' 0.60 (unitless) 0.40 it N (Y or N) (unitless) It It 42.23 ft'/sec ft'/sec 0.26 ft'/sec 3.62 days OK, draws down in 2-5 days. ECE R$ 3:1 OK 10' OK FEB 14 2017 10.0 ft OK 3:1 OK 3.0 :1 OK BY: y (Y or N) OK 3.3ft OK N (Y or N) OK N (Y or N) Insufficient. Recorded drainage easement required. Y (Y or N) OK portable pump Form SW401-Wet Detention Basin-Rev.9-4118112 Parts 1. 511. Design Summary, Page 2 of 2 Permit III. REQUIRED ITEMS CHECKLIST (to be provided by D WQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. f> 6z CS^161 1. Plans (1" - 50' or larger) of the entire site showing: C5-!eS - Design at ultimate build -out, L G- Joe - - Off -site drainage (if applicable), to17 - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High Flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. CC -foc - 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: 107 - Outlet structure with trash rack or similar, 6G-flD - Maintenanceaccess, - Permanent pool dimensions, - Forebay and main pond with hardened emergency spillway, - Basin cross-section, - Vegetation specification for planting shelf, and - Filter strip. 3. Section view of the wet detention basin (1" = 20' or larger) showing: ctw.. A - Side slopes, 3:1 or lower, .�.� - Pretreatment and treatment areas, and - Inlet and outlet structures. m "IC 3 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified ffo the plans prior to use as a wet detention basin. d GZ 5. A table of elevations, areas, incremental volumes &accumulated volumes for overall pond and for Forebay, to verify volume provided. G Z C�iO f 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. �//// 7. The supporting calculations. p D �Z 8. A copy of the signed and notarized operation and maintenance (O&M) agreement. i� 9. A copy of the deed restrictions (if required). GL Tk 10. A soils report that is based upon an actual field inve So En B ad in Ciu! °r p p seilKonrig�r�nAinfilirationtests. County soil maps are not an acceptable source of soils infotionJAN Z 6 2017 BY: ---- Form SW401-Wet Detention Basin-Rev.9-4118112 Part III. Required Items Checklist, Page 1 of 1 Permit (to be Provided by DWO) Agin NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part /it) must be printed, filled out and submitted along with all of the required information. o2�p W ATEgOG �n r � r O T I, PROJECT -INFORMATION n, ",.,. '" Project name - 2DANGLICOAND2NBNOPSCOMPLEXES, Contact person HOWARD RESNIK, PE Phone number 910-791-4441 ' Date 4/18/2012' Drainage area number A IL.DESIGNINFORMATION .. 20 5 ;: She Characteristics Drainage area - 974,361 hr Impervious area, post -development 601,894 ft' %impervious 61.46 % Design rainfall depth 1.5'in Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is the pre/post control of the tyr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the perm. pool elevation) Top of 1 Oft vegetated shelf elevation Bottom of 1 Oft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stored above the state -required temp. pool? Elevation of the top of the additional volume 73,442fe 76,991 I(!' OK, volume provided is equal to or in excess of volume required. F, y (Y or N) 3.8'in ' 0.30'(unitless) 0.66,(unitless) `0.16 Whir OK h'/sec h'/sec felsec 14.20'fmsl -13.00 fmsl 9.90 fmsl 13.50fmsl 12.50 fmsl . 8.00 fmsl .. 7.00 fmsl 1.00 it N (Y or N) 14.2 fmsl OK APR 2 3 2012 Fonn SW401-Wet Detention Basin-Rev.9-4/18112 Parts 1. a H. Design Summary, Page / of 2 Permit No. (fo be Providedby DW0) II DESIGN INFORMATIONIV: `, Y .,? .,.`.-4;3" t-�S>b A �. ` $''' . < s .xx. Surface Areas Area, temporary pool 67,603 f� Area REQUIRED, permanent pool 52,983 f? SAIDA ratio 5.41 (unitless) Area PROVIDED, permanent pool, Ao,._pw `" 57,953:fe OK Area, bottom of 10tt vegetated shelf, Aw a„„ , -, -. 51,333,W Area, sediment cleanout, top elevation (bottom of pond), k d 34,242f Volumes Volume, temporary pool Volume, permanent pool, Vp,-, ,, Volume, forebay (sum of forebays if more than one forebay) Forebay % of permanent pool volume SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? MountairdPiedmont SAIDA Table Used? SAIDA ratio Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 104b) Volume, permanent pool, VP,.-" Area provided, permanent pool, A.r„_u Average depth calculated Average depth used in SAIDA, d,,, (Round to nearest 0.5ff) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, A,,_. Area, bottom of 1 On vegetated shelf, Am, y„ n Area, sediment cleanout, top elevation (bottom of pond), A, ,yora 'Depth' (distance b1w bottom of 10n shelf and top of sediment) Average depth calculated Average depth used in SAIDA, d,,, (Round to nearest 0.5n) Drawdown Calculations Drawdown through orifice? Diameter of orifice (if circular) Area of orifice (it -non -circular) Coefficient of discharge (CD) Driving head (Ha) Drawdown through weir? Weir type Coefficient of discharge (C„) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width ratio Length to width ratio Trash rack for overflow d orifice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all mnoff at ultimate build -out? Drain mechanism for maintenance or emergencies is: Form SW401-Wat Detention Basin-Rat8-0/17109 76,99140 OK ' 219,464 le t 42,721 its 19.5% % OK 90% Y '(Y or N) N (Y or N) 5.41 (unitess) IN -,(Y or N) 219,464 ft' 57,953 f n n 'Y..,. (Y or N) 57,953 tit' 51 33.9 fe 34,242 tt 4.50 n 4.22:'ff 4.0.n a Y (Y or N) 4.00 in in' 0.60 (unitless) 0.40 it n ',(YorN) (unitless) (unitless) It n 42.23.fe/sec 98.54 ft'/sec 0.26�f!'/sec 3.35 days 3':1 10 :1 10.0 n 3::1 3.0 :1 .y - .(Y or N) 3.3 it n ". (Y or N) n'- (Y or N) y'. (Y or N) mrfahlc n„mn - Need 3 it min. OK OK OK, draws down in 2.5 days. OK OK OK OK Of OK OK OK Insufficient. Recorded drainage easement required. OK Parts I. 811. Design Summary, Page 2 of 2 APR 0 9 Z017 Permit (to be provided by DWQ) III:, REOUIRED,ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials No. �� 'S'hreee't' #oR, y" 1. Plans (1' - 50' or larger) of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. u, R. CE 2. Partial plan (1' = 30' or larger) and details for the wet detention basin showing: Outlet structure with trash rack or similar, Maintenance access, Permanent pool dimensions, Forebay and main pond with hardened emergency spillway, Basin cross-section, Vegetation specification for planting shelf, and Filter strip. kle` CC 5U 3. Section view of the wet detention basin (1' = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. /1 t CE M 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. k. rZ, Calcs 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay, to verify volume provided. ll. 2. ( 6Ivl 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. u,A. &mV!4 7. The supporting calculations. A, 9. cnc s 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. M F 9. A copy of the deed restrictions (if required). c do 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.8-9/17/09 [APR- U 9 ZU1Z Part III. Required Items Checklist, Page 1 of 1 �`��j/O�O� Permit No. . (to be provided by DWO) A / op W A 7- rn NCDENR t STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION Project name 2D ANGLICO AND 2N BN OPS COMPLEXES " Contact person " HOWARD RESNIK, PE Phone number 910.791 4441 Date 311/2012' Drainage area number Ih: DESIGN INFORMATION.,. Site Characteristics Y Drainage area ' 497,272 fe Impervious area, post -development 252,148 fe impervious 50.71 % Design rainfall depth 1.5 in Storage Volume: Non -SA Waters Minimum volume required 31,713 ff' Volume provided I I. , 35,871.ft' Storage Volume: SA Waters 1.5' runoff volume f 3 Pre -development 1-yr, 24-hr runoff - - it, Post -development 1-yr, 24-hr runoff - 'It, Minimum volume required fl3 Volume provided ;tt3 Peak Flow Calculations Is the prelpost control of the 1 yr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm Pre -development 1-yr, 24-hr peak Flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWf elevation (approx. at the perm. pool elevation) Top of 10fl vegetated shelf elevation Bottom of 1 Off 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 OK OK, volume provided is equal to or in excess of volume required. (Y or N) 3.8 in 0.30 (unifless) 0.66 (unitless) 0.16 iNhr OK 21.44 fe/sec 47.18 felsec 25.74 ff /sec 13.101msl 12.00 bnsl 10.50:fmsl 12.50.fmsl 11.50 twist 8.00 Ind 7.00 fmsl 1.00 ft --- _ ..N, (YorN) APR U 9 2012 ' 13.1fmsl OK --_ Form SW401-Wet Detention Basin-Rev.8-9117/09 Parts I. 8 II. Design Summary, Page 1 of 2 Permit No. �- Ito be provided by DWO) Surface Areas Area, temporary pool Area REQUIRED, permanent pool SAIDA ratio Area PROVIDED, permanent pool, AP,,., Area, bottom of 10n vegetated shelf, Am, an Area, sediment cleanout, top elevation (bottom of pond), Awe„ volumes Volume, temporary pool Volume, permanent pool, VP,,,_P,u Volume, forebay (sum of forebays if more than one forebay) Forebay % of permanent pool volume SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? Mountain/Piedmont SAIDA Table Used? SAIDA ratio Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Volume, permanent pool, VP,,,_p, Area provided, permanent pool, AP,.-Pw Average depth calculated Average depth used in SAIDA, d,,, (Round to nearest 0.5n) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, Am„ Area, bottom of 1 On vegetated shelf, A., y, Area, sediment cleanout, top elevation (bottom of pond), A,,p. .` 34,379f1z 25,212 flz 5.07 (unitless) '.29,496,fe OK 26,088 fe 19,441 fts _ - 35,871'fe OK ' 93,377,fe 18,946n3 20.3%% OK 90' °/ Y ;. ;(Y or N) N (Y or N) 5.07 (unilless) N (Y or N) 93,377 fe 29,496 fe It - n .Y .(Y or N) 29,496 fl? 26,088 f? 19,441 ft' Need 3 It min. 'Depth' (distance b/w bottom of 10tt shelf and top of sediment) 3.50 it Average depth calculated 3.53 It OK Average depth used in SAIDA, d,,, (Round to nearest 0.5n) - "3.5;tt OK Drawdown Calculations Drawdown through orifice? -.. y•(Y or N) Diameter of orifice (if circular) 2.75,in Area of orifice (if -non -circular) - in' Coefficient of discharge (CO) - 0.60,(unitless) Driving head (HO) 0.37:n Drawdown through weir? - n (Y or N) Weir type 1(unNess) Coefficient of discharge (C.) (unitless) Length of weir (L) It Driving head (H) it Pre -development l-yr, 24-hr peak flow - 21.44 fe/sec Post -development l-yr, 24-hr peak flow 47,18: ft31sec Storage volume discharge rate (through discharge orifice or weir) 0.12 f?/sec Storage volume drawdown time . 3.44Aays Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of nowpath to width ratio Length to width ratio Trash rack for overflow & orifice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all runoff at ultimate build -out? Drain mechanism for maintenance or emergencies is: Forth S W401-Wet Detention Basin-Rev.0­9/17/09 OK, draws down in 2-5 days. Y:1 OK " - 10,:1 OK - 10.0.It OK , 3':1 OK 3.0:1 OK y - (Y or N) OK 2.4 it OK n (Y or N) OK - n (Y or N) Insufficient. Recorded drainage easement required. y:(Y or N) OK portable pump Parts I. & II. Design Summary, Page 2 of 2 APR u 9 Z01Z r Permit No. ( (to be provided by DWO) IlljxREQUIREDrITEMSCHECKLIST q Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Paget Plan Initials Sheet No. k r , CE Io 1. Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. il( rQ- E So 2. Partial plan (1' = 30' or larger) and details for the wet detention basin showing: - Outlet structure with trash rack or similar, Maintenance access, Permanent pool dimensions, Forebay and main pond with hardened emergency spillway, Basin cross-section, Vegetation specification for planting shelf, and Filter strip. 3. Section view of the wet detention basin (1" = 20' or larger) showing: Side slopes, 3:1 or lower, Pretreatment and treatment areas, and Inlet and outlet structures. li r Q. CIF lo( 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay, to verify volume provided. 6. A construction sequence that shows how the wet detention basin will be protected from sediment unfit the entire drainage area is stabilized. 7. The supporting calculations. 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. dig, Nl tt 9. A copy of the deed restrictions (if required). II.Q, icy_ 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. -- -- 7 APR U 9 ZUI Form SW401-Wet Detention Basin-Rev.8-9/17/09 — -- —� Part III.. Required Items Checklist, Page 1 of 1 Permit No. t (lobe provided by DWO) NCDENR O1F W A r�90 AA I � r STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. Project name Contact person Phone number Date Drainage area number - - 910-791-4441 '311/2012 C: 2D ANGLICO AND 2N BN OPS COMPLEXES HOWARD RESNIK; PE' ;. Ili DESIGN INFORMATION Site Characteristics Drainage area 228,797,1? Impervious area, post -development 133,601i r , %impervious 58.39% Design rainfall depth 1.5 in Storage Volume: Non,SA Waters Minimum volume required 16,580. ft' OK Volume provided 19,797'h' OK, volume provided is equal to or in excess of volume required. Storage Volume: SA Waters . 1.5' runoff volume Pre -development l-yr, 24-hr runoff Post -development l-yr, 24-hr runoff It' Minimum volume required t Volume provided its Peak Flow Calculations Is the prelpost control of the lyr 24hr storm peak flow required? (Y or N) 1-yr, 24-hr rainfall depth 3.8in Rational C, pre -development 0.30(unidess) Rational C, post -development - 0.68-(unitiess) Rainfall intensity: 1-yr, 24-hr storm - 0.16 irVhr OK Pre -development 1-yr, 24-hr peak flow 9.86 fe/sec Post -development 1-yr, 24-hr peak flow 22.39 ft'/sec Pre/Post 1-yr, 24-hr peak flow control 12.53 ff'/sec Elevations Temporary pool elevation 12.80.fmsl Permanent pool elevation - 12.00 fmsl SHWT elevation (approx. at the perm. pool elevation) 11.10.fmsl Top of 10R vegetated shelf elevation 12.50fmsl Bottom of 1 Oft vegetated shelf elevation 11.501msl Sediment cleanout, top elevation (bottom of pond) 8.00 fmsl Sediment cleanout, bottom elevation 7.00 fmsl Sediment storage provided 1.00 It Is there additional volume stored above the state -required temp. pool? ' N '(Y or N) Elevation of the top of the additional volume 12.8 fmsl OK Form SW401-Wet Detention Basin-Rev.e-9117109 APR U 9 ZUiZ Parts I. & II. Design Summary, Page 1 of 2 - ' 1 Permit No. no eeProvided by DWO) • k DESIGN INFORMATION o... s4... »:,.. ,::„ ` •`- •" . " �'°T: y " fi^"" �.,w A iws, ; �,'t,-+= Surface Areas Area, temporary pool " �26,106.fe Area REQUIRED, permanent pool 13,362 ft' SAIDA ratio. 5.84(unidess) Area PROVIDED, permanent pool, A., 22,626 OK OK Area, bottom of 1Off vegetated shelf, Aw_w _19,848;ttr Area, sediment cleanout, top elevation (bottom of pond), A�yx� (, I: 14,526 ft, Volumes Volume, temporary pool 19;797,ft" OK Volume, permanent pool, VP,,,,_p, 70,586,fC' Volume, forebay (sum of torebays if more than one torebay) 14,325 f 3 Forebay %of permanent pool volume 20.30/6 % OK SAIDA Table Data Design TSS removal 90;% Coastal SAIDA Table Used? - , Y ` " -;(Y or N) Mountain/Piedmont SAIDA Table Used? N (Y or N) SAIDA ratio 5.84 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) N - '(Y or N) Volume, permanent pool, VP,m-" 70,586 fe Area provided, permanent pool, A� 22,626 ft' Average depth calculated - •ft Need 3 ft min. Average depth used in SAIDA, d,,, (Round to nearest 0.5ft) - '' ft Calculation option 2 used? (See Figure 10.2b) . Y (Y or N) Area provided, permanent pool, A,m,., 22,626 fe Area, bottom of 11Nt vegetated shelf, Aw, tee,. 19,848 fe Area, sediment cleanout, top elevation (bottom of pond), A,.,a 'Depth' (distance blw bottom of 1 Oft shelf and top of sediment) Average depth calculated Average depth used in SAIDA, d,,, (Round to nearest 0.5ff) Drawdown Calculations Drawdown through orifice? Diameter of orifice (if circular) Area of orifice (if -non -circular) Ccefficient of discharge (CD) Driving head(H.) Drawdown through weir? Weir type Coefficient of discharge (C„) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width ratio Length to width ratio Trash rack for overflow & orifice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all runoff at ulfimate build -out? Drain mechanism for maintenance or emergencies is: Farm SW401-Wet Detention Basin-Rev.8-9/17109 14,526 fe 3.50 ft 3.50,ft 3.5 ft . y..(Y or N) 2.50 in in' 0.60 (uni less) 0.27,ft n.',. '(Y or N) (unitless) (unhless) ft ft 9.86. ft"Isec 22.39 Osec 0.09. ft"Isec 2.69 days 3':1 10 :1 10.0'ft 3 :1 3A':1 y (Y or N) 2.7 ft .n.... (Y or N) n..... (YorN) y-- I(Y or N) nortable numn . . . (— - — - OK OK OK, draws down in 2-5 days. OK OK OK OK OK OK OK OK Insufficient. Recorded drainage easement required. OK Parts 1. & 11. Design Summary, Page 2 of 2 APR 0 9 ZGIZ Permit (to be provided by DWO) III.,REQUIRE0ITEMVCHECKILISTg " '�" = E •: �;= „ - - Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. CC fol 1. Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. u I#- CE ,P 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: Outlet structure with trash rack or similar, Maintenance access, Permanent pool dimensions, Forebay and main pond with hardened emergency spillway, Basin cross-section, Vegetation specification for planting shelf, and Filter strip. 3. Section view of the wet detention basin (1' = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. CE 101 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. uTn- Calcc 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay, to verify volume provided. _ CFlollol 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. At, k- e I 7. The supporting calculations. eAC1,54 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. Ivilk 9. A copy of the deed restrictions (if required). 41(s 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. APR U 9 2012 Form SW401-Wet Detention Basin-Rev.8-9/17/09 - — — --J . Part III. Required Items Checklist. Page 1 of 1 Permit No. (to be provided by DWD) J ®A NCDENR OF w A rFyoG h r s STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. 1. PROJECT INFORMATION Project name 2D ANGLICO AND 2N BN OPS COMPLEXES - Contact person .: HOWARD RESNIK, PE Phone number 91(Ml 4441 - . Date 3/1Y2012 - Drainage area number .D _ II. -DESIGN. INFORMATION She Characteristics , Drainage area 806,844 f? Impervious area, post -development 394,958'he impervious 48.95 Design rainfall depth , .1.5. in Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is the pre/post control of the tyr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr. 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SH WT elevation (approx. at the perm, pool elevation) Top of 1 Oft vegetated shelf elevation Bottom of tOh 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 Form SW401-Wet Detention Basin-Rev.8-9r17/09 54,145 h' ltti Insufficient required volume. OK, volume provided is equal to or in excess of volume required. (Y or N) 3.8 in - 0.30(unitless) .0.62.(unitless) 0.161Nhr OK 34.78 fe/sec 71.91 fe/sec 37.13 h'/sec 11.00'fmsl —10.00 hnsl 8.60 first 10.50 fmsl 9.50 first 6.00,fmsl 5.00 fmsl 1.00 It N. r. (Y or N) 11.0 fmsl OK r_ APR 0 9 2012 Parts I. & II. Design Summary, Page 1 of 2 Permit (to be prowled by DWO) ILiDESIGNINFORMATION' >'..,r':�-?', h •," ;..-,` Surface Areas Area, temporary pool �57,402.f1z Aiea REQUIRED, permanent pool SAIDA ratio Area PROVIDED, permanent pool, Am. Area, bottom of 1Off vegetated shelf, Aga„„ Area, sediment cleanout, top elevation (bottom of pond), At. Volumes Volume, temporary pool Volume, permanent pool, V,,my,p Volume, forebay (sum of forebays if more than one forebay) Forebay % of permanent pool volume ,SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? Mountain/Piedmont SAIDA Table Used? SAIDA ratio Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Volume, permanent pool, V,..l Area provided, permanent pool, Adam. Average depth calculated Average depth used in SAIDA, d,,, (Round to nearest 0.5ft) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, Am. Area, bottom of 10ff vegetated shelf, A,_ � Area, sediment cleanout, top elevation (bottom of pond), Awt a 39,535 fe 4.90. (unitless) - 48,499 fe OK - 41,819.fe ' 28,129!le OK 145,008 fe ..... 31,154 tt3 21.5% % OK 90 i Y JY or N) N (Y or N) 4.90 limitless) .(Y or N) 145,008 fe 48,499 fe It It Y (Y or N) 48,499 fit 41,819 ff 28,129 fh Need 3 it min. 'Depth' (distance h/w bottom of 1 Off shelf and top of sediment) 3.50 it Average depth calculated 7-19 3.39tt OK Average depth used in SAIDA, d,,, (Round to nearest 0.511) 3.5'it OK Drawdown Calculations Drawdown through orifice? Diameter of orifice (if circular) Area of orifice (if -non -circular) Coefficient of discharge (Co) Driving head (Ho) Drawdown through weir? Weir type Coefficient of discharge (C„) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development t-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width ratio Length to width ratio Trash rack for overflow 8 orifice? Freeboard provided Vegetated filler provided? Recorded drainage easement provided? Capures all runoff at ultimate build -out? Drain mechanism for maintenance or emergencies is: Forth SW401-Wet Detention Basin-Rev.8 W17/09 Y.,. (Y or N) - 3.50: in in' 0.60 (unilless) 0.33 it n '(YorN) limitless) (unitless) It It 34.78,felsec 71.91 fe/sec 0.18 fe/sec 3.39 days OK, draws down in 2-5 days. .. _. 3.:1 OK 10 :1 OK -` 10.0.11 OK .3.:1 OK -; 3.0:1 OK y. .(Y or N) OK '2.5:ff OK n (Y or N) OK n ''(Y or N) Insufficient. Recorded drainage easement required. .-y (Y or N) OK portable pump ,.. .. Parts I. a II. Design Summary, Page 2 of 2 APR 0 9 Z01Z Permit (to be provided by DWD) IW REQUIRED ITEMS.CHIECKGST-. Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. CC I01 1. Plans (1' - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. r R CC 50y 2. Partial plan (1' = 30' or larger) and details for the wet detention basin showing: - Outlet structure with trash rack or similar, Maintenance access, Permanent pool dimensions, Forebay and main pond with hardened emergency spillway, Basin cross-section, Vegetation specification for planting shelf, and Filter strip. U 904 3. Section view of the wet detention basin 0' = 20' or larger) showing - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. LC lot 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. �i. it, (� Vs 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for frebay, to verify volume provided. Mil, L. CC 101 6. A construction sequence that shows how the wet detention basin will be protected from sediment unfit the entire drainage area is stabilized. A,R. e�bs�J 7. The supporting calculations. b ,a em1 sa 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. If ,A, NI N 9. A copy of the deed restrictions (if required). .0 Ics 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.8-9/17/09 APR 0 _9 ZGIZ- — Part III. Required Items Checklist, Page 1 of 1 Permit No. V W D (1=(,7 (to be provided by DWO) '/�+ O?pf W ATFgOG LT -WA STORMWATER MANAGEMENT PERMIT APPLICATION FORM o NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Pad 111) must be printed, filled out and submitted along with all of the required information. Contact Person Phone Number Date Drainage Area Number Bn Thomas Bradshaw, Public Works Civil Engineering 910-451-3238 211612017 1 II. DESIGN INFORMATION Site Characteristics Drainage area 72,309.60 ff' Impervious area 29,620.60 ft' Percent impervious 40.96 % Design rainfall depth 1.50 in Peak Flow Calculations 1-yr, 24-hr rainfall depth 3.60 in 1-yr, 24-hr intensity 0.15 inmr Pre -development 1-yr, 24-hr discharge 0.07 ft'Isec Post -development 1-yr, 24-hr discharge 0.00 ft'Isec Pre/Post 1-yr, 24-hr peak flow control -0.07 ft3lsec Storage Volume: Non -SA Waters Minimum design volume required 3,784.28 ff' Design volume provided 9,460.70 h' OK for non -SA waters Storage Volume: SA Waters 1.5' runoff volume It Pre -development 1-yr, 24-hr runoff volume f 3 Post -development 1-yr, 24-hr runoff volume It Minimum required volume It' Volume provided If Soils Report Summary Soil type Baymeade Infiltration rate 2.59 in/hr SHWT elevation 22.50 fmsl Basin Design Parameters Drawdown time 1.70 days OK Basin side slopes 3.00 :1 OK E C E B Basin bottom elevation 24.50 fmsl OK Y G Storage elevation 26.60 fmsl Storage Surface Area 7,386.00 ff2 FEB 2 2 2017 Top elevation 27.50 fmsl Basin Bottom Dimensions By; Basin length 265.00 It Basin width 8.00 If Bottom Surface Area 2,248.00 ff� Form SW401-Infiltration Basin-Rev.5 11Apr2011 Parts I. a II. Design Summary, Page 1 or 2 Additional Information Maximum runoff to each inlet to the basin? 1.60 ac-in OK Length of vegetative filter for overflow NA It OK Distance to structure 400.00 It OK Distance from surface waters 1,000.00 ft OK Distance from water supply well(s) NA ft OK Separation from impervious soil layer NA It OK Naturally occuring soil above shwt 2.50 ft OK Bottom covered with 4-in of clean sand? Y (Y or N) OK Proposed drainage easement provided? NA (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Bypass provided for larger storms? Y (Y or N) OK Pretreatment device provided itch basin and swale Permit No. (to be provided by DWO) rFCEB EIV E 2 2 2017 BY: - — Form SW401-Infiltration Basin-Rev.5 1 tApr201 t Parts I. a II. Design Summary, Page 2 of 2 Permit III. REQUIRED ITEMS.CHECKLIST (to be provided by DWQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. C3101- 1. Plans (1" - 50' or larger) of the entire site showing: 65161 - Design at ultimate build -out, cc, (Ole - Off -site drainage (if applicable), COG - Delineated drainage basins (include Rational C coefficient per basin), C sf4 - Basin dimensions, - Pretreatment system, - High Flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and CC _ (ad - Boundaries of drainage easement. 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing: sr¢ - Bypass structure, - Maintenance access, - Basin bottom dimensions, - Basin cross-section with benchmark for sediment cleanout, - Flow distribution detail for inflow, - Vegetated filler, and - Pretreatment device. 3. Section view of the infiltration basin (1" = 20' or larger) showing: - Pretreatment and treatment areas, and - Inlet and outlet structures. �/34r Cq-51 � 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. 44 1n.i- a5- Sri V11erf. 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. 6. A construction sequence that shows how the inftlration basin will be protected from sediment until the entire drainage area is stabilized. p V/� Z 7. The supporting calculations. 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. 9. A copy of the deed restrictions (if required). JAPE 2 6 2017 , Q, BY: Form SW401-Infiltration Basin-Rev.4 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1 Permit Number< W I v7Vb (roee ProvitlMby DWO) ®�� O WxTFgOG NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM SAND FILTER SUPPLEMENT This form must be filled out on line, printed and submitted with all of the required information. Make sure to also fill out and submit the Required Items Checklist (Section Ilq and the ISM Agreement (Section IV) I. PROJECT INFORMATION Project name 2nd Radio On Contact name Phone number Date Drainage area number II. DESIGN INFORMATION Site Characteristics Drainage area (A,) 228,690.00 ft' OK Impervious area 174,240.00 0' % Impervious (la 76.2% % Design rainfall depth (RP) 1.50 in Peak Flow Calculations 1-yr, 24-hr runoff depth 3.60 in 1-yr, 24hr intensity 0.15 inthr Pre-0evelopment 1-yr, 24-0r runoff 0.36 Wised Post -development 1-yr, 24hr runoff 0.29 helsec PrelPost 1-yr, 24-fir peak control -0.07 fl'Isec Storage Volume Design volume (WOV) 21,031.00 fis Adjusted water quality volume (WOVE) 15,773.25 ft' Volume contained in the sedimentation basin and on top of the sand filter 27,301.00 ffe Top of sand filter/grate elevation 20.6 it amel Weir elevation (between chambers) 18 itamsl Maximum head on the sedimentation basin and sand filter (he,,, .) 2.60 ft Average head on the sedimentation basin and sand filter (hrJ 1.30 it Runoff Coefficient (Rv) 0.74 (unidess) Type of Sand Filter Open sand filter? Y Y or N SHWT elevation 14.33 it amsl Bottom of the sand filter elevation 16.50 it annual Clearance (dslrvn) 5.17 Clcsedlprecast sand filter? N YorN SHWT elevation it amsl Bottom of the sand filter elevation it amsl Clearance (d,.n) If this is a closed, underground closed sand filter The clearance between the surface of the sand filter and the bottom of the roof of the underground it structure (d,_) 0 1 C A R ii��. 9 a SEAL 039121 OK C.' OK OK ECEIVE FEB 14 2011 Form SW401-Sao FieerRev.5 200913e,117 Pans 1 and II. Project Design Summary, Page I of 2 t Permit Number ft. be provided by OWOJ Sedimentation Basin Surface area of sedimentation basin (A,) 411780 fit vn wzuo I'll u.uut 111, 111 to w to w11will and icyoun, vulunar 11 a;1uP .11i Sedimentation basinichamber depth 2.00 ft Sand Filter Surface area of sand filter (Ar) 4,117.80 ft' ""' ""tiu illlllli uut ill, li to w mucmcu m cullte1n me ltgmiEu vmmile a Ceui comet Top of sand media filler bed elevation 18.00 fl amsl Bottom of sand media filter bed/drain elevation 16.50 ft amsl Depth of the sand media filter bed fitly) 1.50 ft Coefficient of permeability, for the sand filter (k) 3.50 (fuday) Outlet diameter 6.00 in Outlet dischergelflowrate 0.14 floc/sac Time to drain the sand filter (t) 25.02 hours OK Submit drainage calculations. Time to drain the sand filter (t) 1.04 days Additional Information Does volume in excess of the design volume bypass the sand filler? Y Y or N OK Is an off -fine flowsplitting device used? Y Y or N OK If draining to SA waters: Does volume in excess of the design volume flow evenlytdistributed through a vegetated filter? N Y or N Excess volume must pass through filler. What is the length of the vegetated filter? ft Does the design use a level spreader to evenly distribute flow? Y or N Is the BMP located at least 3Dft from surface waters (50ft if SA waters)? Y Y or N OK If not a closed bottom, is BMP located at least 100ft from water supply wells? Y or N Are the vegetated side slopes equal to or less than 3.1 Y YorN OK Is the BMP located in a recorded drainage easement with a recorded access NA Y or N Insufficient ROW location. easement to a public Right of Way (ROM? What is the width of the sedimentation chamber/forebay (W,J? 10.00 ft OK What is the depth of sand over the outlet pipe (dpipe)? 1.00 ft OK ECEH @7 E FEB 14 2017 BY: Form SW401-Sam Filter Rev.5 2017 Paris 1 atM II. Project Design Summary, Page 2 of 2 Permit No. (to be provided by DWQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Initials Pagel Plan Sheet No. 6 ZZ c5-101 - 1. Plans (1" - 50' or larger) of the entire site with labeled drainage area boundaries CS- /°s - System dimensions (length, width, and depth) for both the sedimentation chamber and the filter G6 Idl - chamber, G6 tro - Maintenance access, 6-5o - Flow splitting device, - Proposed drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), and - Boundaries of drainage easement. �?G Z C6-07 2. Plan details (1" = 30' or larger) for the sand filter showing: G_ y(3 - System dimensions (length, width, and depth) for both the sedimentation chamber and the filter chamber, - Maintenance access, - Flow splitting device, - Vegetative filter strip dimensions and slope (if SA waters), - Proposed drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), and - Boundaries of drainage easement. GZ;t3 3. Section view of the sand filter (1" = 20' or larger) showing: - Depth(s) of the sedimentation chamber and sand filter chamber, - Depth of sand filter media, - Connection between the sedimentation chamber and the sand filter chamber and weir elevation, - SHWT elevation, - Outlet pipe, and - Clearance from the surface of the sand filter to the bottom of the roof of the underground structure (if applicable). 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The Sw gyI. f results of the soils report must be verified in the field by DWQ, by completing & submitting the soils PW-J-,,rfl investigation request form. County soil maps are not an acceptable source of soils information. vZZ 5. Supporting calculations (including drainage calculations) F 6. Signed and notarized operation and maintenance (0&M) agreement 4_ 7. A copy of the deed restrictions (if required). FGY=1VE JAN 2 6 23317 i BY: --- Form SW401-Sand Filter-Rev.5 2009Sept17 Part III, Page 1 of 1 15- In <RD State Slormwater Management Systems Y�..a�. Permit No. SW8 110906 2D Anglico and 2N OPS Complexes Stormwater Permit No. SW8 110906 Onslow County Designer's Certification — Sand Filter 1, _ Adam Pilarz , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe<eriodica eekly/full time) the construction of the project, P1280 2D Radio Battalion Complex Operations Consolidation (Project) for MCB Camp Lejeune (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 are a part of this Certification. Noted deviations from approved plans and specifications: CgRO//�ii oe'.Fessro.!y 2; ? 9'9 •a SEAL r• 047270 GINS Signature Registration Number 047270 Date 9 Yv1 ECEIVE OCT 3 0 2019 BY Paqe 11 of 12 c, �, �;�, �., u � e'sDS n, r� t ^ii ^�'� 0 4� �rs State Stormwater Management Systems Permit No. SVJ8 110906 Certification Requirements. X 1. X 2. X 3. NIA 4 X 5 X g NIA 7 X 8 The drainage area to the system contains approximately the permitted acreage. The drainage area to the systern contains no more than the permitted amount of built -upon area. All the built -upon area associated with the project is graded such that the runoff drains to the system. All roof drains are located such that the runoff is directed into the system The sand filter elevations are per the approved plan. The sand filter is located per the approved plans. A trash rack is provided on the outleUbypass structure. For open sand filters, all slopes are grassed with permanent vegetation. X 9. Vegetated slopes are no steeper than 3:1. X 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. X 11. The permitted amounts of surface area and/or volume have been provided. NIA 12. Required drawdown devices are correctly sized and located per the approved plans. X 13. All required design depths are provided. X 14. All required parts of the system are provided, such as a vegetated shelf, a forebay, and the vegetated filter. X 15. The required dimensions of the system are provided, per the approved plan. cc: NCDEQ-DEMLR Regional Office ECEIVE OCT 3 0 2019 BY• Page 12 of 12 M State Stormwater Management Systems Permit No. SW8 110906 Mod. 2D Anglico and 2N OPS Complexes Stormwater Permit No. SW8 110906 Onslow County Designer's Certification I, Howard Resnik , as a duly registered professional engineer In the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, 2D Anglico 2N OPS Complexes (Project) Commanding Officer, USMCB Camp Lejeune, c/o Neal Paul, Deputy for Puhl ; c wnrkc Off; rP (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specifications: Some storage volumes and permanent pool surface areas are slightly below original design,values but are all above the calculated minimum required and within 10% deviation from the design. CAR � , SS0•./� Signature SEAL v 9 025483 NC PE # 025483 a r — Registration Number 9/�9llf = '• ti0 . G Date 9/29/15 �, /y' INE. �,�aR0lS.R�\ nff-GEWE SEP 3 0 2015 BY: Page 7 of 8 State Stormwater Management Systems Permit No. SW8 110906 Mod. Certification Requirements: _1. The drainage area to the system contains approximately the permitted acreage. N,►f. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. / �5. The outlet structure elevations are per the approved plan. _6. The outlet structure is located per the approved plans. _7. Trash rack is provided on the outlet structure. �l L�8. All slopes are grassed with permanent vegetation. k, It• 9. Vegetated slopes are no steeper than 3:1. / ,/j• 10, The inlets are located per the approved plans and do not cause short-circuiting of the system. 1, 11. The permitted amounts of surface area and/or volume have been provided. (,e 12. Required drawdown devices are correctly sized and located per the approved plans. t?_13. All required design depths are provided. ^i1,K14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 11,17, 15. The required system dimensions are provided per the approved plans. 4..,C. 16. All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDENR-DWQ Regional Office SEP 3 0 2015 nv_ Y Page 8 of 8