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HomeMy WebLinkAboutSW8140122_CURRENT PERMIT_20220831STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 H o 1 22 DOC TYPE © CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE Zo 22 o s?> 1 YYYYMMDD ROY COOPER covemor ELIZABETH S. BISER Secretary BRIAN WRENN Director August 31, 2022 Marine Corps Base Camp Lejeune Attn: Neal Paul, Deputy Public Works Officer 1005 Michael Road Camp Lejeune, NC 28547 NORTH CAROLINA Environmentail Quality Subject: Permit Renewal Post -Construction Stormwater Management Permit No. SW8 140122 P1349 Special Operations Training Complex Site 1 Onslow County Dear Mr. Paul: The Division of Energy, Mineral and Land Resources received a complete 8-year Permit Renewal Application for the subject permit on August 10, 2022. The Division is hereby notifying you that permit SW8140122 has been renewed, updated, and re -issued on August 31, 2022, as attached. Please be aware that the renewal and re - issuance of this stormwater permit does not imply that the site is currently in compliance. This permit shall be effective until February 28, 2030 and does not supersede any other agency permit that may be required. The project shall be subject to the conditions and limitations as specified therein. This permit does not impose new or increased stormwater control requirements; it clarifies the rules and requirements of this program to provide you with abetter understanding of your obligations under this permit. Failure to comply with these requirements will result in future compliance problems. Please note that this permit is not transferable except after notice to and approval by the Division. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 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 concerning this permit, please contact Ashley Smith in the at (910) 796-7215 or ashleym.smith@ncdenr.gov. Sincerely, C14L_")J64 5�; Brian Wrenn, Director Division of Energy, Mineral and Land Resources Enclosures: Attachment A — Designer's Certification Form Attachment C — Permitting History Renewal Application Documents DES/ams: \\\Stormwater\Pemiits & Projects\2014\140122 HD\2022 08 permit 140122 ec: Wilmington Regional Office Stormwater File ®ra North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 2a405 Homo rurouw ��+��• �. 910.796.7215 Post -Construction Stormwater Management Permit No. SW8 140122 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES POST -CONSTRUCTION STORMWATER MANAGEMENT PERMIT HIGH DENSITY COMMERCIAL DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO USMCB Camp Lejeune P1349 Special Ops Training Complex Site #1 Booker T. Washington Boulevard, Camp Lejeune, Onslow County FOR THE construction, operation and maintenance of two (2) sand filter(s), 2 areas of permeable pavement, a Rainwater Harvesting System and areas of redevelopment (the "redevelopment area") in compliance with Session Law 2008-211 and the provisions of 15A NCAC 2H .1000 (hereafter collectively referred to as the "stormwater rules') and as outlined in the application, approved stormwater management plans, supplement, calculations, operation and maintenance agreement, recorded documents, specifications, and other supporting data (the "approved plans and specifications") as attached and/or on file with and approved by the Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR"). The project shall be constructed, operated and maintained in accordance with these approved plans and specifications. The approved plans and specifications are incorporated by reference and are enforceable part of this permit. This permit shall be effective from the date of issuance until February 28, 2030 and shall be subject to the following specified conditions and limitations. The permit issued shall continue in force and effect until the permittee files a request with the Division for a permit modification, transfer, renewal, or rescission; however, these actions do not stay any condition. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit for cause as allowed by the laws, rules, and regulations contained in Title 15A NCAC 2H.1000 and NCGS 143-215.1 et.al. I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Sections 1.7, 1.8 and 1.9 of this permit. The runoff from all BUA within the permitted drainage areas of this project must be directed into the permitted stormwater systems. 3. 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. The project shall provide and maintain a 50' wide vegetated buffer adjacent to surface waters, measured horizontally from and perpendicular to the normal pool of impounded structures, the top of bank of each side of rivers and streams and the mean high water line of tidal waters. All runoff being directed into wetlands shall flow into and through those wetlands at a non - erosive velocity of 2 fps or less. Page 1 of 8 Post -Construction Stormwater Management Permit No. SW8 140122 6. No direct discharges to SA waters are allowed. The runoff in excess of the design storm bypassed from the sand filter must be directed into a 50' vegetated filter strip and level spreader, designed per Section .1008 (f) of the stormwater rules. The underdrain discharge must be directed in a diffuse, non -erosive manner into the buffer, or into a vegetated area capable of achieving effective infiltration of the runoff. The following design elements have been approved for the sand filters, and must be provided in the system at all times. DA2 DA3 SF #2 SF #1 a. Drainage Area, acres: 1.88 3.00 Onsite, ft2: 82,052 130,783 Offsite, ftZ: 0 0 b. Total Impervious Surfaces, ftZ: 18,422 54,001 Buildings, ft2: 1,250 18114 Roads/Parking, ft2: 10,536 30,796 Other, ft2: 6,636 7,821 Offsite, ft2: 0 0 RHS roof BUA credit, ft2: 0 (-2,730) c. Greater Design Storm, inches: 1.5 1.5 d. Sand Bed Depth, feet: 1.5 1.5 e. Sediment Chamber Bottom Elev. fmsl: 27.0 25.5 r. Top of Sand Elev., fmsl: 27.0 25.5 g. Sediment Surface Area, As, ft2: 628 1,551 h. Sand Surface Area, Af, ft2: 3,223 5,179 i. Weir / Storage Elevation, fmsl: 28.5 27.0 j. Maximum Head on Filter, feet: 1.5 1.5 k Permitted Storage Volume, ft': 6,356 10,287 I. No. Underdrains / Diameter, inches: 10 / 6" 0 10 / 6" 0 m. Time to Draw Down, hours: 4.1 6.7 n. Seasonal High Water Table, FMSL: 24.5 23.0 o. Clay liner provided / thickness: Yes / 12" Yes / 12" p. Receiving Stream / River Basin: Stones Bay / WOK02 q. Stream Index Number: 19-30 r. Classification of Water Body: "SA HQW' 8. The following design elements have been approved for the permeable pavement areas acting as infiltration systems for the 10 yr 24 hr storm and must be provided and maintained at design condition: DA1 DA4 a. Drainage Area, ft2: 79,044 17,678 Permeable pavement, ft2: 77,944 17,288 Adjacent Area, ft2: 1,100 390 b. Effective BUA, ft2: 38,972 8,644 C. Total BUA, ft2: 40,072 9,034 d. Design Storm, inches: 3.67 3.67 e. Dwq Aggregate Depth, inches: 14 14 f. Storage Volume, ft3: 36,374 8,068 g. Expected Infiltration Rate, in/hr: 1.13 4.02 h. 10 year 24 hour design storm, in.: 6.83 6.83 i. SHWT, FMSL: 29.0 26.0 j. Time to Draw Down, days: 1.27 0.35 k. Receiving Stream/River Basin: Stones Bay / WOK02 I. Stream Index Number: 19-30 m. Classification of Water Body: "SA HQW' Page 2 of 8 Post -Construction Stormwater Management Permit No. SW8 140122 9. The following design elements have been approved for the Rainwater Harvesting System located within DA3 for SF #1, and must be provided and maintained at all times: a. Captured Roof Area, ftz: 2,730 b. Design Storm, inches: 3.67 C. Runoff Volume provided, ft3: 2005 (StormTank Model 15,000 gallons) d. Dedicated Use: Toilet Flushing (100%) (Based on a demand of 1,000 gallons per day) e. Overflow treatment: DA3 sand filter 10. The redevelopment portion of this project is exempt from State Stormwater permitting requirements under the following conditions: a. The project must be constructed as shown on the plans submitted to this Office. b. The redevelopment area proposes 9,010 square feet of BUA, which does not exceed the existing BUA of 12,224 square feet. This permit does not provide any allocation of BUA for future development within this redevelopment area. C. The proposed stormwater control, sheet flow, provides equal protection of surface waters as the existing stormwater control, sheet flow. It. SCHEDULE OF COMPLIANCE The permittee is responsible for verifying that the constructed built -upon area for the entire project and for each permitted BMP does not exceed the maximum allowed by this permit. 2. 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. 3. 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. 4. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. Infiltration systems should not be used as erosion control devices, due to the potential clogging. 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. 5. 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. 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. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. Page 3 of 8 Post -Construction Stormwater Management Permit No. SW8 140122 8. 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. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater system function at the design condition. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of filter media, bypass structures, orifice, catch basins and piping. g. Access to all components of the system must be available at all times. 10. 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. III. GENERAL CONDITIONS 1. CORRECTIVE ACTIONS REQUIRED. If the facilities fail to perform satisfactorily, the permittee shall take immediate corrective actions. This includes actions required by this Division and the stormwater rules such as the construction of additional or replacement on -site stormwater systems. These additional or replacement measures shall receive a permit from the Division prior to construction. 2. PERMIT RENEWAL. A permit renewal request must be submitted at least 180 days prior to the expiration date of this permit. The renewal request must include the appropriate application, documentation and the processing fee as outlined in Title 15A NCAC 02H.1045(3). 3. CHANGES TO THE PROJECT NAME, PERMITTEE NAME OR CONTACT INFORMATION. The permittee shall submit a completed Permit Information Update Application Form to the Division within 30 days to making any one of these changes. Page 4 of 8 Post -Construction Stormwater Management Permit No. SW8 140122 4. TRANSFER. This permit is not transferable to any person or entity except after notice to and approval by the Director. Neither the sale of the project and/or property, in whole or in part, nor the conveyance of common area to a third party constitutes an approved transfer of the permit. a. TRANSFER REQUEST. The transfer request must include the appropriate application, documentation and the processing fee as outlined in 15A NCAC 02H.1045(2). This request must be submitted within 90 days of the permit holder meeting one or more of the following: i. A natural person who is deceased, ii. A partnership, limited liability corporation, corporation, or any other business association that has been dissolved; iii. A person or entity who has been lawfully and finally divested of title to the property on which the permitted activity is occurring or will occur through foreclosure, bankruptcy, or other legal proceeding. iv. A person or entity who has sold the property, in whole or in part, on which the permitted activity is occurring or will occur, V. The assignment of declarant rights to another individual or entity; vi. The sale or conveyance of the common areas to a Homeowner's or Property Owner's Association, subject to the requirements of NCGS 143-214.7(c2); b. TRANSFER INSPECTION. Prior to transfer of the permit, a file review and site inspection will be conducted by Division personnel to ensure the permit conditions have been met and that the project and the on -site stormwater system complies with the permit conditions. Records of maintenance activities performed to date may be requested. Projects not in compliance with the permit will not be transferred until all permit and/or general statute conditions are met. 5. COMPLIANCE. The permittee is responsible for compliance with the terms and conditions of this permit until the Division approves the transfer request. a. APPROVED PLANS AND SPECIFICATIONS. A copy of this permit, approved plans, application, supplement, operation and maintenance agreement, all applicable recorded documents, and specifications shall be maintained on file by the permittee at all times. b. DIVISION ACCESS. The permittee grants Division Staff permission to enter the property during normal business hours to inspect all components of the permitted project. C. ENFORCEMENT. Any individual or entity found to be in noncompliance with the provisions of a stormwater management permit or the requirements of the stormwater rules is subject to enforcement procedures as set forth in NCGS 143 Article 21. d. ANNUAL CERTIFICATION. The permittee shall electronically submit to the Division an annual certification completed by either the permittee or their designee confirming the projects conformance with permit conditions e. OBTAINING COMPLIANCE. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of modified plans and certification in writing to the Director that the changes have been made. OTHER PERMITS. The issuance of this permit does not preclude the permittee from complying with and obtaining any other permits or approvals that are required for this development to take place, as required by any statutes, rules, regulations, or ordinances, which may be imposed by any other Local, State or Federal government agency having jurisdiction. Any activities undertaken at this site that cause a water quality violation or undertaken prior to receipt of the necessary permits or approvals to do so are considered violations of NCGS 143-215.1, and subject to enforcement procedures pursuant to NCGS 143-215.6. Page 5 of 8 Post -Construction Stormwater Management Permit No. SW8 140122 Permit renewed, updated and reissued this the 31st day of August 2022. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION ('Aa Sian Wrenn, UireCtor Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Permit Number SW8 140122 Page 6 of 8 Post -Construction Stormwater Management Permit No. SW8 140122 P1349 Special Ops Training Complex Site #1 Page 1 of 2 Stormwater Permit No. SW8 140122 Onslow County Attachment A Designer's Certification 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 7 of 8 Post -Construction Stormwater Management Permit No. SW8 140122 Certification Requirements: Page 2 of 2 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 8 of 8 Attachment C - Permitting History P1349 Special Operations Training Complex Site #1 Permit No. SW8140122 Approval Permit Action BIMS Description of the Changes Date Version 2 sand filters (DA2 & 3); and 2 areas of permeable pavement (DAI & 4). 2/28/2014 New 1.0 Rainwater Harvesting System. Building RR210 demolished. (Permit subject to 2008-21 1 session law) The Decontamination Facility was relocated appx 100' north and had additional work associated with utility removal and installation, as well 1 1/9/2016 Plan Revision 1.1 as removal of existing buildings (RR234, 235, 236). The additional BUA is less than the amount previous to removal. New EOTG PEB built in original design location of the Decontamination 2/21/2020 Minor Mod/ 12 Facility. Building RR209, RR210 and the gravel area to the south will be Redeveloment removed. Old BUA= I 2,224sf--New BUA=9,0IOsf 8/31/2022 Renewal 2.0 Expires February 28, 2030 Permit Number. 's1/cj.5�114141-1 (lobe provided by DWQ) Drainage Area / Lot Number: 2 We3 Permeable Pavement 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. At all times, the pavement shall be kept free of: — Debris and particulate matter through frequent blowing that removes such debris, particularly during the fall and spring. — Piles of soil, sand, mulch, building materials or other materials that could deposit particulates on the pavement. Piles of snow and ice. Chemicals of all kinds, including deicers. The permeable pavement 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 Areas of bare soil and/or Regrade the soil if necessary to permeable pavement erosive gullies remove the gully, then plant ground ' cover and water until established. ------- vegetated area drains Regrade the area so that it drains toward the pavement. away from the pavement, then plant ground cover and water until established. I The surface of the Trash/debris present Remove the trash/debris. permeable pavement Weeds Do not pull the weeds (may pull out media as well). Spray them with a systemic herbicide such as glyphosate and then return within the week to remove them by hand. (Another option is to pour boiling water on them or steam them.) Sediment Vacuum sweep the pavement. Rutting, cracking.or slumping Consult an appropriate professional. or damaged structure ...... ...... .... .... Observation well Water present more than five Clean out clogged underdrain pipes. days after a storm event Consult an appropriate professional for clogged soil sub grade. Educational sign Missing or is damaged. Replace the sign. Torm SW401-Permeable Pavement O&M-Rev.4 10/63/2012 . Page 1 of 2 Permit Number: ..Xyi 140IZZ (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name: P1349 Special Operations Training Complex BNIP drainage area or lot number: Print Title: Deputy Public Works Officer. Address: 1005 Michael Road, Carnp Lejeune. NC 28547 Phone: 910-451-22 L3 Signature: Date: a, 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. day of a Notary Public for the State of County of L/V ►e(1 I LT-V-,J do hereby certify that personally eared before me this and acknowledge the due execution of the forgoing permeable pavement maintenance re ire Witnes y ha nd official seal, SEAL rKELLEY VANDECOEVERI NOTARY PUBLIC ATE OF NOR HOUNTY CAROLINA My commission expires Form SW401-Permeable Pavement O&M-Rev.4 10/03/2012 Page 2 of 2 ' L ' Permit Number: ,J (to be provided byrDu1Q) Drainage Area Number: Sand Filter 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. 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 will 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 Iwill remediate the a roblem: 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 applicable) pavement surface. possible. Perimeter of sand filter Areas of bare soil and/or erosive Regrade the soil if necessary to remove the gullies have formed. 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 long. Maintain vegetation at an appropriate height - 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. Forebay or pretreatment area Sediment has accumulated to a Search for the source of the sediment and depth of greater than six inches. remedy the problem if possible. Remove the sediment and stabilize or 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 a pesticide is used, wipe it on the plants rather than spraying. Form SW401-Sand Filier O&M-Rev.4 2009Septl7 Page 1'of 3 °BMP element:x . „ ' ' ' Potential ' roblem: How I will remediate the roblem: ' Filter bed and underdrain Water is ponding on the surface for Check to see if the collector system is collection system more than 24 hours after a storm. clogged and flush if necessary. If water still ponds, remove the top few inches of filter bed media and replace. If water still ponds, then consult an expert. Outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment offsite 'the outlet device is damaged Repair or replace the outlet device. Receiving water Erosion or other signs of damage Contact the NC Division of Water Quality have occurred at the outlet. 401 Oversight Unit at 919-733-1786. Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 2 of 3 Permit Number: 56U • - (io be provided by DWO) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:P1349 Special Operations Complex BMP drainage area number: 3 (Sand Filter 1) Print Title:Deputy Public Works Officer Address:1005 Michael Road, Camp Lcieune. 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. a Notary Public for the State of Countyof V V I D (O l/N , do hereby certify that personally appeared before me this n day of and acknowledge the due �ce Ion forgoing sand filter maintenance requirements. Witness my hand KELLEY VANDECDEVERINCr NOTARY PUBLIC ONSLOW COUNTY ' STATE OF NORTH CAROLINA SEAL My commission expires Form SW401-Sand Filter O&M-Rev.4 2009Septl7 Page 3 of 3 Permit Number: `5 `UY / %�/" (to be providedrb^y DIVQ) Drainage Area Number: 2 t� Sand Filter 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 is 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. 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 will 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 rolile"m: 'I How I will cernediate theproblem: 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 applicable) pavement surface.. possible. Perimeter of sand filter Areas of bare soil and/or erosive Regrade the soil if necessary to remove the gullies have formed. 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 long. Maintain vegetation at an appropriate height. 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. Forebay or pretreatment area Sediment has accumulated to a Search for the source of the sediment and depth of greater than six inches. remedy the problem if possible. Remove the sediment and stabilize or 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 a pesticide is used, wipe it on the plants rather than spraying. Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 1 of 3 BMP element: `" ' ' . Totentialproblem: How I'"will remediate the, tob]em: Filter bed and underdrain Water is ponding on the surface for Check to see if the collector system is collection system more than 24 hours after a storm. clogged and flush if necessary. If water still ponds, remove the top few inches of filter bed media and replace. If water still ponds, then consult an expert. Outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment offsite. The outlet device is damaged Repair or replace the outlet device. Receiving water Erosion or other signs of damage Contact the NC Division of Water Quality have.occurred at the outlet. 401 Oversight Unit at 919-733-1786. Form SW401-Sand Filter O&M-Rev.4 2009Septl7 Page 2 of 3 r.. Permit Number: S�,0 ,? N01 Z Z (to be provided by UtVQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. l.agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project nanie:P1349 Special Operations Complex 6M1' drainage area number: 2 (Sand Filter 2) Print name: Title:Deputy Public Works Officer Address:1005 Michael Road, Camp Leieune, 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, �iA��UV�I W �" t'� ►� , a Notary Public for the State of County of UN do hereby certify that personally appeared before me this M day of and acknowledge the due execution of the forgoing sand filter maintenance requirements. Witness my hand and LLEY VANDECOEVERIN NOTARY PUBLIC ONSLOW COUNTY STATE OF NORTH CAROLINA SEAL My commission expires \ V a l It Form SW401-Sand Filter O&M-Rev.4.2009Septl7 Page 3 of 3 1 PermitNumbec SlN (to be provided by DJVQ) Drainage Area Number: Rainwater Harvesting System 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. Important maintenance procedures: , — The'roof area will be maintained to reduce the debris and sediment load to the system. Excess debris can clog the system and lead to bypass of the design storm, and reduced reuse volume. — To ensure proper operation as designed, a licensed Professional Engineer, Landscape Architect, or other qualified professional will inspect the system annually. G : The system components will be repaired or replaced whenever the jay it to function properly. 1 ✓Ay 3 — If the outlet is metered, use must be recorded at a minimum of my. These ?�iy records shall be kept on site for inspection by DWQ. The system will be inspected by the owner/operator at least monthly and within 24 hours after each rain event. 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: Potentialproblems: How to remediate theproblem: The entire system A component of the system is Make any necessary repairs or replace if damaged or leaking. damage is too large for repair. Water is Flowing out of the Check system for clogging and damage. Repair overflow pipe during a as needed so the design volume is stored design rainfall or smaller properly without discharging during a design (usually a 1" or 1.5" rainfall). storm. Check that the pump is operating properly and that the water is actually being used at the volume designed.. If it is still not operating properly, then consult an expert. The captured roof area Excess debris or sediment is Remove the debris or sediment as soon as resent on the rooftop. possible. The gutter system Gutters are clogged, or water Unclog and remove debris. May need to install is backing up out of the gutter screens to prevent future clogging. gutter system. Rooftop runoff not making it Correct the positioning or installation of gutters. into gutter system. Replace if necessary to capture the roof runoff. Form SW401-Rainwater Harvesting O&M-Rev.I Page 1 of 3 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element:' Potentialproblems: How to remediate theproblem: The. pump Pump is not operating Check to see if the system is clogged and flush if properly. necessary. If it is still not operating, then consult an expert. The overflow pipe Erosion is evident at the Stabilize immediately. overflow discharge point. The overflow pipe is clogged: Unclog or replace if if cannot be unclogged. The outflow pipe is damaged. Repair or replace the pipe. The secondary water Not operating properly. Consult an, expert. supply The cistern Sediment accumulation of 5% Remove sediment. or more of the design volume. Algae growth is present Do not allow sunlight to penetrate the cistern. inside the cistern. Treat the water to remove/ prevent algae. Mosquitoes in the cistern. Check screens for damage and repair/replace. Treat with 'mosquito dunks' if necessary. The screen's and filters Debris and/or sediment has Search for the source of the debris/sediment accumulated. Screens and and remedy the problem if possible. filters are clogged. Clean/clear debris/sediment from screen or filter. Replace if it cannot be cleaned. Form SW401-Rainwater Harvesting O&M-Rev.I Page 2 of 3 Permit Number. ,ti() F (f-O - (to be provided by DWQ) Drainage Area Number: 3 I acknowledge and agree by my signature below, that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name: P1349 Special Operations Training Complex BMP drainage area number: Print name: Title: Deputy Public Works Officer Address: 1005 Michael Road, 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, County of day of ��Qy\ forgoing rooftop management seal, KELLEY VANDECOEVERING NOTARY PUBLIC ONSLOW COUNTY STATE OF NORTH CAROLINA a Notary Public for the State of M) , do hereby certify that personally appeared before me this and acknowledge the due execution of the mcqreW=s. Witness my hand an SEAL l ` My commission expires Form SW40I-Rainwater Harvesting O&M-Rev.I Page 3 of 3 .J Permit Number. sw e/ (to be provided by DWQ) Drainage Area / Lot Number: 4-C.SnvfA Permeable'Pavement 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. At all times, the pavement shall be kept free of: — Debris and particulate matter through frequent blowing that removes such debris, particularly during the fall and spring. — Piles of soil, sand, mulch, building materials or other materials that could deposit particulates on the pavement. — Piles of snow and ice. — Chemicals of all kinds, including deicers. The permeable pavement 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 Areas of bare soil and/or Regrade the soil if necessary to permeable pavement erosive gullies remove the gully, then plant ground cover and water until established. A vegetated area drains Regrade the area so that it drains toward the pavement. away from the pavement, then plant ground cover and water until established. The surface of the Trash/debris present Remove the trash/debris. permeable pavement ------------- j Weeds Do not pull the weeds (may pull out I media as well). Spray them with a systemic herbicide such as glyphosate and then return within the week to remove them by hand. (Another option is to pour boiling --- - water on them or steam them.) -. _ Sediment Vacuum sweep the pavement ---- --- Rutting, cracking or slumping Consult an appropriate professional. or -damaged -structure Observation well Water present more than five Clean out clogged underdrain pipes. . days after a storm event Consult an appropriate professional for clogged soil subgrade. Educational sign Missing or is damaged. Replace the sign. Form SW401-Permeable Pavement O&M-Rev.4 10/03/2012 Page 1 of 2 -%► - Permit Number: 5CU?tP0/ZZ (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for -the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name: P1349 Special Operations Training Complex BMP drainage area or lot number: Print Title: Deputv Public Works Officer Address:. 1005 Michael Road, Camp Leieune, 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. 1�' V �� uWV va Notary Public for the State of County of _ UV\Nj Loj jfkJ do hereby certify thatnn.//11 personally appeared before me this v� day of �J KN\ /,U 1V1, and acknowledge the due execution of the I forgoing permeable pavement maintenance require e s. itness my hand seal, SEAL KELLEY VANDECOEVERING NOTARY PUBLIC ONSLOW COUNTY STATE OF NORTH CAROLINA My commission expires Form SW401-Permeable Pavement O&M-Rev.4 10/03/2012 Page 2 of 2 Permit Number: (lobe provided by DWQ) Drainage Area Number: Filter Strip, Restored Riparian Buffer and Level Spreader 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 BiN41 . Important maintenance procedures: — Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation — Stable groundcover will be maintained in the drainage area to reduce the, sediment load to the vegetation. — Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches' depending on aesthetic requirements (NIPC, 1993). Forested filter strips do not require this type of maintenance. — Once a year, the soil will be aerated if necessary- - Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (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: Potentialproblem: How I will remediate theproblem: The entire filter strip Trash/debris is present. Remove the trash/debris. s stem I I ' The flow splitter device The flow splifter device is Unclog the conveyance and dispose (if applicable) clogged. of any sediment off -site. The flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for repair. JAN 3 i 2014 BY:_ Form SWU40I-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3 BMP element: The swale and the level lip The bypass channel The receiving water Potential problem: The swale is clogged with sediment. The level lip is cracked, settled, undercut, eroded or otherwise damaged. There is erosion around the end of the level spreader that shows stormwater has bypassed it. Trees or shrubs have begun to grow on the swale or just .. downslope of the level lip. Areas of bare soil and/or erosive gullies have formed. Turf reinforcement is damaged or ripap is rolling downhill. Grass is too short or too long Areas of bare soil and/or erosive gullies have formed. Sediment is building up on the filter strip. Plants are desiccated. are dead, diseased or dying. Nuisance vegetation is choking out desirable species. Erosion or other signs of damage have occurred at the outlet. Remove the sediment and dispose of it off -site. Repair or replace lip., Regrade.the soil to create a berm that is higher than the level lip, and then plant a ground cover and water until it is established. Provide Lime and a one-time fertilizer Remove them. Regrade the soil if necessary to remove the gully, and then reestablish proper erosion control. Study the site to see if a larger bypass channel is needed (enlarge if necessary). After this, reestablish the erosion control material. Maintain grass at a height of approximately three to six inches. Regrade the soil if necessary to remove the gully, and then plant a ground cover and water until it is estabhshed. Provide time and a one-time fertilizer application. Remove the sediment and restabilize the soil with vegetation if necessary. Provide time and a one- time fertilizer application. Provide additional irrigation and fertilizer as needed. Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Remove vegetation by hand if possible. If pesticide is used, do not allow it to get into the receiving water. .Contact the NC Division of Water Quality local Regional Office, or the 401 Oversight Unit at 919-733-1786. Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3 I Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior.to any changes to the system or responsible party. Projeci nome: P 1349 Special Operations Trainiru; Complex BAIPdrainageareanumber: 3(LS38); 2(LS 38); 2(LS56); 3(LS42)' Print Title: Deputy Public Works Officer Address: 1005 Michael Road, 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. ."Y'AA AWN kLUUXV11 LA *) , a Notary Public for the State of County of UV 10 UT" do hereby certify that yujU� personally appeared before me this day of 0)l and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level Witness my hand and official seal, KELLEY VANDECOEVERINO NOTARY PUBLIC ONSLOW COUNTY STATE OF NORTH CAROLINA SEAL My commission expires Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3 UEMLH Ubt UNLY Date Re eived Fee Paid Permit Number to a� mt�WFu7U 3 SaS= sus t vla� 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 140122 2. Project name: P1349 Speical Operations Training Complex Site 1 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? N/A If the project has changed from the original approved plans, please complete SWU-101 fora Major Modification or Minor Modification Application form available at: https://deg.nc.gov/about/divisions/energv- mineral-land-resources/energy-mineral-land-ru I es/stormwate r-prog ram/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: https://deg.nc.gov/about/divisions/energy-mineral-land- resources/energy-mineral-land-rules/stormwater-program/post-construction. 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 Lcieune 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 AUG i o 2o22 l ay, Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018 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 HOW/ORW). Only applications packages that include all required items listed below will be accepted and reviewed. Initial each item below to indicate that the required information is provided in the application package: MCT 1. A permit application processing fee of $505.00 payable to NCDEO. MCT 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 I. Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity. MCT 3. One hard copy and one electronic copy of recorded documents required by the original permit that have not yet been received by DEMLR, including: deed restrictions, protective covenants, condominium/planned community declaration and easements. If the project has been built, include documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If the project has not been built, include a signed agreement that the final recorded deed restrictions and protective covenants will be submitted at a later date. MCT 4. O&M Agreements, Please select one: ® I 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 ❑ 1 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. MCT 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. MCT 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). tG �e 0 W a.,, AUG 10 2022 Slormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018 1 D. PER LEE'S C RTI/FICA,TIIO`N- I, U, �7J�✓�1' 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, wnership. mation provided on this permit renewal application is, to the best of my knowledge, c rre d com ete. Signature: Date: ?'L NOTARIZATION: I' j I, 1 v� 1 1 v on /� a Notary Public for the State of 1 '/f , County of ✓)S�O , do hereby certify that r / t- 14 �VVC4., opersonally appeared before me this the day of PaA (Aj I 20 27! and acknowledge the due execution of the forgoing instrument. Witness my hand and official seal, (Notary Seal) Notary Signature: My commission expires 5APf - 22t .v...... �v�•NpTARy '• _ 01. tis . O �. rr�rrnt�r���� AUG 10 2022 BY.•, Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 Permit No—:!�& o /� / �— (to be provided by DWO) AMMSTORMWATER MANAGEMENT PERMIT APPLICATION FORM NCDENR 401 CERTIFICATION APPLICATION FORM PERMEABLE PAVEMENT SUPPLEMENT This form must be completely 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. o=Of WArfgq jf olqiii�I I. PROJECT INFORMATION Project Name P1349 Special Operations Training Complex Contact Person David Tower Phone Number 910-451-3238 Date 2/19/2014 Drainage Area 1 III. DESIGN INFORMATION Soils Report Summary Hydrologic soil group (HSG) of subgrade C Infiltration rate 1.13 in/hr Pavement Design Summary BUA Credit for Permeable Pavement Footprint: Permeable Pavement (PP) design type Infiltration - HSG C/D 50% BUA Credit SA of PP being proposed (Ae) Resulting BUA counted as impervious for main application form Adjacent BUA directed to PP (AJ Ratio of A, to Ao Flow from pervious surfaces is directed away from PP? sign rainfall depth ermeable pavement surface course type Layer 1- Washed aggregate size (ex. No. 57) Layer 1-Aggregate porosity (n) Layer 2 - Washed aggregate size (ex. No. 57) Layer 2 - Aggregate porosity (n) Minimum total aggregate depth for design rainfall (q„o) Drawdown/infiltration time for as How is 10-yr, 24-hr storm handled? Aggregate depth to infiltrate 10-yr, 24-hr storm (Dro) Drawdown/infiltration time of 10-yr, 24-hr storm Actual provided total aggregate depth Top of aggregate base layer elevation Storage elevation of design rainfall depth Overflow elevation Bottom elevation at subgrade SH WT elevation Underdrain diameter 77,944 ftz 38,972 ftz 1,100 It, OK 0.01+ (unitless) Yes OK lyr,24hr post -pre in PC 57 0.40 (unitless) OK 2.00 0.40 (unitless) OK 9.3 in 0.7 days OK infiltrated 3.7 in 1.27 days 14.0 in OK 32.63 fmsl 32.30 fmsl 32.63 fmsl 31.33 fmsl 29.00 fmsl NA in #REF! ECEIVE FES 2 0 2014 BY. - Form SW401-Permeable Pavement-Rev.4-October 16, 2012 PP Supplement Form, Page 1 of 3 Permit 11 Detention Systems (skip for infiltration systems) Diameter of orifice efficient of discharge (Cu) hiving head (H.) Storage volume discharge rate (through discharge orifice) Storage volume drawdown time Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Additional Information Slope of soil subgrade at bottom of permeable pavement Slope of the permeable pavement surface Construction sequence minimizes compaction to soils? Subsoil preparation specified (must select one) Meets industry standards for structural requirements? Washed stone is specified for the aggregate? Required signage specified on plans? Number of observation wells provided Distance to structure Distance to surface waters Distance to water supply well(s) in (unitless) ft ft'/sec days ft'/sec ft'/sec O.so % OK 2.50 % OK Yes OK scarified Yes OK Yes OK Yes OK 11 OK 139.00 ft >SO ft OK >100 ft OK (to be provided by DWO) ECEIVE FEB 2 0 2014 BY, Form SW401-Permeable Pavement-Rev.4-October 16, 2012 PP Supplement Form, Page 2 of 3 Permit No. I' (to be provided by DWO) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. 1. Plans It" = 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Location of permeable pavement, - Roof and other surface flow directed away from permeable pavement, - Location of the permeable pavement sign(s). 2. Section view of the permeable pavement (1" = 20' or larger) showing: - All layers (including details about the surface course), and SHWT 3. A detail of what the permeable pavement sign. 4. A site specific soils report that is based upon an actual field investigation, soil borings, and infiltration tests within the footprint of the proposed permeable pavement. The soils ,vestigation shall state the infiltation rate, SHWT elevation, and ormation about any confining layers. County soil maps are not an acceptable source of soils information. (Projects in the WiRO -The results of the soils report must be verified in the field by DWO, by completing & submitting the soils investigation request form.) 5. A construction sequence that shows how the permeable pavement will be protected from sediment until the entire drainage area is stabilized. 6. The supporting calculations. 7. A copy of the signed and notarized operation and maintenance (0&M) agreement. 8. A copy of the deed restrictions (if required). MA CS001 C-509 C-509 Attached C-001/C-501 Attached Attached Pagel Plan Sheet No. itCEIVE FEB 2 0 2014 BY: Form SW401-Permeable Pavement-Rev.4-October 16, 2012 PP Supplement Form, Page 3 of 3 Permit Number:��` (to be provided by DWQ) OF W ATpq DENR 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 III) and the I&M Agreement (Section IV) I. PROJECT INFORMATION rroleci name Contact name Phone number Date Drainage area number P1349 910-451-3238 February 19, 2014 3 (Sand Filter 1) II. DESIGN INFORMATION Site Characteristics Drainage area (AD) 130,783.00 it OK Impervious area % Impervious (IA) Design rainfall depth (Ro) Peak Flow Calculations 1-yr, 24-hr runoff depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff st 1-yr, 24-hr peak control _.ge Volume Design volume (WOV) Adjusted water quality volume (WOVAa) Volume contained in the sedimentation basin and on top of the sand filter Top of sand filter/grate elevation Weir elevation (between chambers) Maximum head on the sedimentation basin and sand filter (hMa F;ner) Average head on the sedimentation basin and sand filter (hA) Runoff Coefficient (Rv) Type of Sand Filter Open sand filter? SHWT elevation Bottom of the sand filter elevation Clearance (dsewr) Closed/pre-cast sand filler? SHWT elevation Bottom of the sand filter elevation Clearance (dsewT) 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 structure (dsp,e) 56,731.00 ft2 43.4% % 1.50 In 3.67 in 0.15 in/hr 2.25 ft3/sec 4.23 ft3/sec 1.98 ft'/sec 6,883.00 ft3 5,162.25 h3 OK 10,287.00 If 27.25 it amsl 27 it amsl 1.50 If Insufficient depth. 0.75 It OK 0.44 (unilless) Y YorN 23.00 It amsl 23.45 ft amsl 0.45 YorN ft amsl ft amsl ECEIVE. FEB 2 0 2014 ey-.___�_ Form SW401-Sand Filter Rev.52009Sept17 Parts I and IL Project Design Summary, Page 1 of 2 Permit Sedimentation Basin Surface area of sedimentation basin (As) Sedimentation basin/chamber depth 9ler _..ce area of sand filter (AF) Top of sand media filter bed elevation Bottom of sand media filter bed/drain elevation Depth of the sand media filter bed (dr) Coefficient of permeability for the sand filter (k) Outlet diameter Outlet discharge/flowrate Time to drain the sand filter (t) Time to drain the sand filter (t) Additional Information Does volume in excess of the design volume bypass the sand filter? Is an off-line flow -splitting device used? If draining to SA waters: Does volume in excess of the design volume flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? Is the BMP located at least 30ft from surface waters (50ft if SA waters)? If not a closed bottom, is BMP located at least 100ft from water supply wells? Are the vegetated side slopes equal to or less than 3:1 Is the BMP located in a recorded drainage easement with a recorded access easement to a public Right of Way (ROW)? What is the width of the sedimentation chamber/forebay (WsJ? What is the depth of sand over the outlet pipe (dpipe)? �i4 (to be provided by DWO) � ( 1 748 d0 (tz Z' OK. Meets minimum, but may need to be increased to 1.50 ft 5,179.00 fe OK. Meets minimum, but may need to be increased to 25.50 ft amsl 23.45 ft amsl 2.05 it 3.50 (fYday) 6.00 in 0.42 ft'/sec 6.70 hours OK. Submit drainage calculations. 0.28 days Y YorN OK Y Y or N OK Y YorN OK 50.00 ft Y YorN OK Y YorN OK Y YorN OK Y YorN OK NA 18.00 ft 1.50 ft Y or N Insufficient ROW location. OK OK ' * J FEB 2 f 2014 Bi Form SW401-Sand Filter-Rev.5 2009Sept17 Pans I and II. Project Design Summary, Page 2 of 2 11=0 (to be provided by DWQ) REQUIRED ITEMS 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 Page/ Plan Sheet No. CS001 �11 0 CG-102 1. Plans (1" - 50' or larger) of the entire site with labeled drainage area boundaries - System dimensions (length, width, and depth) for both the sedimentation chamber and the filter chamber, Maintenance access, 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. . Plan details (1" = 30' or larger) for the sand filter showing: System dimensions (length, width, and depth) for both the sedimentation chamber and the 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. C-520 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, filter - 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). Attached 4. 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 DWO, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. 6L Attached 5. Supporting calculations (including drainage calculations) plA Attached 6. Signed and notarized operation and maintenance (0&M) agreement N/A 7. A copy of the deed restrictions (if required). F-C. EI E . FEB 2 0 2014 BY. — Form SW401-Sand Filter-Rev.5 2009Sept17 Part III, Page 1 of 1 Permit Number: (to be provided by OWO) �CDENR 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 Ill) and the I&M Agreement (Section IV) I. PROJECT INFORMATION Project name P1349 Special Operations Training Complex Contact name David Towler Phone number Date Drainage area number II. DESIGN INFORMATION Site Characteristics 910-451-3238 ,19,2014 Filler 2) Drainage area (AD) 82,052.00 it OK Impervious area 18,422.00 ft2 % Impervious (IA) 22.5% % Design rainfall depth (Ro) 1.50 in Peak Flow Calculations 1-yr, 24-hr runoff depth 3.67 in 1-yr, 24-hr intensity 0.15 in/hr Pre -development 1-yr, 24-hr runoff 2.21 ft"/sec Post -development 1-yr, 24-hr runoff 1.94 fl3/sec ,sl 1-yr, 24-hr peak control -0.27 ft3/sec ge Volume Design volume (WOV) 2,667.00 Its Adjusted water quality volume (WOVAdi) 2,000.25 h3 OK Volume contained In the sedimentation basin and on top of the sand filter 6,356.00 If Top of sand filter/grate elevation 28.75 it amsl Weir elevation (between chambers) 28.5 it amsl Maximum head on the sedimentation basin and sand filter (hMmFihe,) 1.50 if Insufficient depth. Average head on the sedimentation basin and sand filter (hA) 0.75 It OK Runoff Coefficient (Rv) 0.25 (unitless) Type of Sand Filter O?�O�F�W,�A,[T\F9�\\OG I V�A/�/���y p�< Open sand filter? Y Y or N SHWT elevation - 24.50 it amsl Bottom of the sand filter elevation 25�ft amsl Clearance (dsHw,) 0.60 Closed/pre-cast sand filter? Y or N SHWT elevation ft amsl Bottom of the sand filter elevation ft amsl Clearance (dSHvrr) 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 ft structure (dsprce) FEB 2 0 2014 BY:________ __ Form SW401-Sand Filter-Rev.5 2009Sept17 Parts I and It. Project Design Summary, Page 1 of 2 Sedimentation Basin Surface4rea of sedimentation basin (As) Sedimentation basin/chamber depth -ilter de area of sand filter (AF) Top of sand media filter bed elevation Bottom of sand media filler bed/drain elevation Depth of the sand media filter bed (dF) Coefficient of permeability for the sand filter (k) Outlet diameter Outlet discharge/flowrale Time to drain the sand filter (t) Time to drain the sand filter (t) Additional Information Does volume in excess of the design volume bypass the sand filter? Is an off-line flow -splitting device used? If draining to SA waters: Does volume in excess of the design volume flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? Is the BMP located at least 30ft from surface waters (50ft if SA waters)? If not a closed bottom, is BMP located at least 100ft from water supply wells? Are the vegetated side slopes equal to or less than 3:1 Is the BMP located in a recorded drainage easement with a recorded access easement to a public Right of Way (ROW)? What is the width of the sedimentation chamber/forebay (Ws�)? What is the depth of sand over the outlet pipe (dpipe)? Permit Number (to be provided by DWO) (p _1,286-00 h2 4` OK. Meets minimum, but may need to be increased to 1.50 ft 3,223.00 it OK. Meets minimum, but may need to be increased to 27.00ftamsl t 2$•5¢s%72//avvS{} 25.10 ft amsl fdeWS l r �L ZI�oW LS I 1.90ftQd¢eP¢ST• l,$ Zfy, 3.50 (fVday) 6.00 in 0.26 ft'/sec 4.10 hours OK. Submit drainage calculations. 0.17 days Y YorN OK Y YorN OK Y Y or N OK 50.00 ft Y YorN OK Y YorN OK Y YorN OK Y YorN OK NA 32.00 It 1.50 If Y or N Insufficient ROW location. OK OK ECEIVE FEB 2 0 2014 BY, Form SW401-Sand Filter-Rev.52009Sem 17 Pans I and II. Project Design Summary, Page 2 of 2 Permit No. (to be provided by DWO) 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 Page/ Plan Sheet No. CS001 1. Plans (1" - 50' or larger) of the entire site with labeled drainage area boundaries - System dimensions (length, width, and depth) for both the sedimentation chamber and the filter chamber, - Maintenance access, - Flow splitting device, - Proposed drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), and CG-102 - Boundaries of drainage easement. 2. Plan details (1" = 30' or larger) for the sand filter showing: - 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. L C-521 3. Section view of the sand filter (1" = 20' or larger) showing l - 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). Attached 4. 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 DWO, by completing & submitting the soils (� investigation request form. County soil maps are not an acceptable source of soils information. 1 Attached 5. Supporting calculations (including drainage calculations) Attached 6. Signed and notarized operation and maintenance (0&M) agreement N/A 7. A copy of the deed restrictions (if required). Form SW401-Sand Filter-Rev.5 2009Sept17 ECrZ8V" FEB 2 0 2014 BY: Part III, Page 1 of 1 Permit No. (to be provided by DWO) OF wA7FR PB+ AO�G h C ICDENR Y STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM RAINWATER HARVESTING SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part IIQ must be printed, filled out and submitted along with all of the required information, Project name Contact person Phone number Date Drainage area number Site Characteristics Captured Horizontal Surface Area of Roof Are you in Coastal County SA waters or ORW Areas? Storage Volume: Non -SA Waters / Other Design rainfall Rain Harvesting Volume Provided (Must include a factor of safety at least 1.2x design rainfall) Rain Harvesting Volume Provided Storage Volume: SA Waters & Saltwater ORW Areas Inoff Volume generated from 1.5" 1-yr, 24-hr rainfall depth at your site Pre -Development 1-yr, 24-hr Runoff Post -Development 1-yr, 24-hr Runoff 1-yr, 24-hr Runoff Volume Post -Pre Use 1.5" or Pre/Post? Volume of Rainwater Harvesting System Provided Rain Harvesting Volume Provided at Site Factor of Safety Rain Harvesting Volume Provided 910-451-3238 3 P1349 2,730 it' Yes in to 0.00 ga 342.00 It] 3.67 in 126.00 ft3 793.00 ff3 667.00 it Pre -Post Control 2,005.00 ft3 3.00 14999.41 as David Towler Fill out SA Waters & Saltwater ORW Areas Section DO NOT FILL OUT THIS SECTION OK OK OK (sk=CEIVE [I FEB 2 0 2014 BY: Form SW401-Rainwater Harvesting-Rev.3 Parts I. 8 If. Design Summary, Page 1 of 3 Permit (to be provided by DWQ) % Runoff % Runoff Used On -Site Primary Method Used On -Site Runoff Treated On -Site Primary Method of Treatment % Runoff Infiltrated On -Site Total Runoff Accounted For Water Balance Calculations Attached? Cistern Overflow, Gutter, & Gutter Downspout Sizing Closest City Captured Roof Area Overflow Pipe Diameter Needed (in Dec. Inches) Maximum Captured Area for above Overflow Pipe Guttering Number of Gutters Total Do you have a plan details showing numbered gutters? Do you have a detailed table showing slopes of all gutters? Do you have a detailed table showing diameters of all gutters? Do you have a detailed table showing downspout diameterof all gutters? Do you have a detailed table showing maximum captured area for all gutters? Additional Design Elements '+ave you modeled this system using a water harvesting model? ,ays to Draw Down Rainwater Harvester Overflow discharged to: Does the overflow discharge directly to impervious surfaces? What is the overflow velocity for the 10-year storm? Is the overflow velocity non -erosive Is a First Flush Diverter Used? If First Flush Diverter used, where is bypassed water discharged to? Actual City Closest City Average Annual Historic Rainfall at your Site Percent of Rainfall that will Overflow Cistern Additional Design Elements Which Model? Does this cistern have a dedicated year-round use? Screen Sizing at Entrance to Rainwater Harvester Do you have a secondary water supply to the rainwater harvester? Plans for the footing included in submittal? Is the cistern buried? Pump provided? What is the pressure? What are the designated uses of the pump? `re Pump Sizing Calculations Attached? Cistern Metal? If Metal Cistern - Is Waterproof Bladder Provided? If the only use is irrigation - are plans provided? 100 % Toilets 0 % NA 0 % 100 % OK Yes Wilmington 2730 hz 14 in 16012 it Check Area Going to Overflow Please attach a table showing Gutter numbers, slopes, diameters, downspout sizing and areas going to each N/A gutters gutter Yes OK 15 days Properly Designed BMP OK No OK 2.35 Ns Yes Please provide calculations to show non -erosive velocity Yes Properly Designed BMP OK Camp Lejeune Wilmington 55 in 34 % Stormtank Yes OK 1 mm OK No Yes OK If cistern Is burled, calculations must be provided to Yes show cisternwillnot float when empty 60 psi g sump gq.drZ I ®B' E., No No OK FES 2 0 2014 N/A OK N/A OK Form SW401-Rainwater Harvesting-Rev.3 Parts I. & II. Design Summary, Page 2 of 3 Permit (to be provided by DWO) Labeled as non -potable water? Yes Are Local & State pumbing codes followed? Yes ies this roof area deduct BUA from calculations of another BMP? Yes ,i so, what BMP? Notes: Sand Filter t OK E a+v6` 6 OLr E FEB 2 0 2014 BV. Form SW401-Rainwater Harvesting-Rev.3 Parts I. & II. Design Summary, Page 3 of 3 Permit (to be provided by DWO) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. *1CS-001 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), Rain Harvester dimensions, Pretreatment system, Any first flush bypass system, Maintenance access, CG-102 �lr \ C-517/C-518 N/A C-501 Attached Attached . N/A Attached N/A IJ ` Attached - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. 2. Partial plan (1" = 30' or larger) and details of rain harvester showing: Maintenance access Volume Area overflow is directed to and appropriate details of overflow area including vegetation, seeding plan and side slopes Screen sizing Waterproof bladder it applicable Footings Pump design and sizing Guttering with sizing and slopes, overflows, and Filter strip. 3. Section view of the roof and rain harvester (1"= 20' or larger) showing: Pretreatment and treatment areas, and Inlet and outlet structures. 4. Rain harvesters shall not be used for sediment and erosion control during construction 5 A table of elevations, areas, gutter slopes, gutter and overflow dimensions, incremental volumes & accumulated volumes for overall site to verify volume provided. 6. A construction sequence that shows how the rain harvester will be implemented on site. 7. The supporting calculations. 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. g' A copy of the deed restrictions (if required). 10. A soils report that is based upon an actual field investigation, soil bodngs, and infiltration tests. County soil maps are not an acceptable source of soils information. 11 A copy of the printout from the water harvesting model used. 12 A copy of average annual rainfall at your site. Form SW401-Rainwater Harvesting-Rev.3 IV FEB 2 0 2014 BY: Part III. Require�tm, Page 1 of 1 s/C) Permit No. _ (to be provided by DWD) WArFg A STORMWATER MANAGEMENT o?pp PERMIT APPLICATION FORM p NCDENR 401 CERTIFICATION APPLICATION FORM PERMEABLE PAVEMENT SUPPLEMENT This form must be completely 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 P1349 Special Operations Training Complex Contact Person David Towler Phone Number 910-4513238 Date 2/19/2014 Drainage Area 4 II. DESIGN INFORMATION Soils Report Summary Hydrologic soil group (HSG) of subgrade C Infiltration rate 4.02 m/hr Pavement Design Summary BUA Credit for Permeable Pavement Footprint: Permeable Pavement (PP) design type Infiltration - HSG C/O 50% BUA Credit SA of PP being proposed (!b) 17,288 ft' Resulting BUA counted as impervious for main application form 8,644 ft, Adjacent BUA directed to PP (A J 390 ftz OK Ratio of A, to Ap 0.02Z (unitless) Flow from pervious surfaces is directed away from PP? yes OK sign rainfall depth 1.5" in ermeable pavement surface course type PC Layer 1- Washed aggregate size (ex. No. 571 57 Layer 1-Aggregate porosity (n) 0.40 (unitless) OK Layer 2 - Washed aggregate size (ex. No. 57) 2.00 Layer 2 -Aggregate porosity (n) 0.40 (unitless) OK Minimum total aggregate depth for design rainfall (C,,) 3.8 in Drawdown/infiltration time for 4,a 0.2 days OK How is 10-yr, 24-hr storm handled? infiltrated Aggregate depth to infiltrate 10-yr, 24-hr storm (D,o) 0.0 in Drawdown/infiltration time of 10-yr, 24-hr storm 0.35 days Actual provided total aggregate depth 14.0 in OK Top of aggregate base layer elevation 29.33 frost Storage elevation of design rainfall depth 28.50 fmsl Overflow elevation 29.33 fmsl Bottom elevation at subgrade 28.33 fmsl #REF! SH WT elevation 26.00 It Underdrain diameter N/A in FEB 10 2014 ow. Form SW 401-Permeable Pavement-Rev.4-October 16, 2012 PP Supplement Form, Page 1 of 3 Permit No. (to be provided by DWO) Detention Systems (skip for infiltration systems) Diameter of orifice in efficient of discharge (Co) (unitless) driving head (Ho) it Storage volume discharge rate (through discharge orifice) ft'/sec Storage volume drawdown time days Pre -development 1-yr, 24-hr peak flow ft'/sec Post -development 1-yr, 24-hr peak flow ft'/sec Additional Information Slope of soil subgrade at bottom of permeable pavement 0.50 % OK Slope of the permeable pavement surface 2.50 % OK Construction sequence minimizes compaction to soils? Yes OK Subsoil preparation specified (must select one) scarified Meets industry standards for structural requirements? Yes OK Washed stone is specified for the aggregate? Yes OK Required signage specified on plans? Yes OK Number of observation wells provided 2 OK Distance to structure 129.00 ft Distance to surface waters >50 ft OK Distance to water supply wells) >100 ft OK 3ECTE-I'V .. FEB 2 0 2014 R, Farm SW401-Permeable Pavement-Rev.4-October 16, 2012 PP Supplement Form, Page 2 of 3 Permit (to be provided by DWO) 111. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. II the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Sheet No. rInitials 1. Plans (1" = SO' 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), CSO01 - Location of permeable pavement, - Roof and other surface flow directed away from permeable pavement, - Location of the permeable pavement sign)s). 2. Section view of the permeable pavement )1" = 20' or larger) �r showing: - All layers (including details about the surface course), and C-509 SHWT 3. A detail of what the permeable pavement sign. AM C-509 4. A site specific soils report that is based upon an actual field f�,,,,y rI investigation, soil borings, and infiltration tests within the footprint of the proposed permeable pavement. The soils ,vestigation shall state the infiltation rate, SHWT elevation, and ,ormation about any confining layers. County soil maps are not Attached an acceptable source of soils information. (Projects in the WiRO -The results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form.) 5. A construction sequence that shows how the permeable IfPI- t ��- pavement will be protected from sediment until the entire C-001/C-501 drainage area is stabilized. 6. The supporting calculations. Attached 7. A copy of the signed and notarized operation and maintenance Attached (O&M) agreement. 8. A copy of the deed restrictions (if required). N/A � CEIVE FEB 2 0 2014 , Form SW401-Permeable Pavement -Rev.,[ -October 16, 2012 PP Supplement Form, Page 3 of 3 AGA. MCDENR Project name Contact name Phone number Date Drainage area number yl LJl{ItA [ STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT This form must be completely filled out, printed, initialed, and submitted. PI349 Specie David Towlef 910-451-3238 January 28, 2014 2 (LS 38) II. DESIGN INFORMATION The purpose of the LS-VFS Other: Explained below Stormwater enters LS-VFS from A BMP Type of VFS Engineered filter strip (graded & sodded, slope <8%) Explanation of any 'Other' responses above If Stormwater Enters the LS-VFS from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the t inmr storm Time of concentration Rainfall intensity, 10-yr storm Peak flow from the 10-yr storm Design storm Maximum amount of flow directed to the LS-VFS Is a flow bypass system going to be used? Explanation of any "Other" responses above If Stormwater Enters the LS-VFS from a BMP Type of BMP Peak discharge from the BMP during the design storm Peak discharge from the BMP during the 10-year storm Maximum capacity of a 100-foot long LS-VFS Peak flow directed to the LS-VFS Is a flow bypass system going to be used? Explanation of any 'Other' responses above Sand filter underdrain flow fe f? cis min nmr cfs Do not complete this section of the form. Do not complete this section of the form. Do not complete this section of the form. Do not complete this section of the form. Do not complete this section of the forth. Do not complete this section of the form. Do not complete this section of the form. Do not complete this section of the form. cfs Do not complete this section of the form. (Y or N) Do not complete this section of the form. Other: Explained below 0.26 cis NA cfs 10 cts 0.26 cfs N (Y or N) A bypass system is required for the excess flow. Outlet for sand filter underdrain ECEIVE JAN 3 1 2014 BY: Form SW401 - LS-VFS - 29June2012 - Rev.10 page 1 of 3 LS•VFS Design Forebay surface area Depth of forebay at stormwater entry point Depth of forebay at stormwater exit point Feet of level lip needed per cfs Computed minimum length of the level lip needed Length of level lip provided Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below): M B W y (flow depth for 10-year storm) freeboard (during the 10-year storm) Peak velocity in the channel during the 10-yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any "Other' responses above 126 sq It No forebay is required. 32 in 12 in Depth is appropriate. 10 tucts 3 ft Ten feet is the minimum level spreader length. 10 ft 50 ft 22.80 fmsl 22.00 must 1.60 N (Y or N) OK Y (Y or N) N (Y or N) N (Y or N) 3.00 it 2.00 ft 6.00 ft N/A ft N/A It Grass N/A (Y or N) Y (Y or N) System is for underdrain flow only. Not 10-year storm. xx' � a J B 1 Form SW 401 - LS-VFS - 29June2012 - Rev.10 page 2 of 3 AV. - III. REQUIRED ITEMS CHECKLIST EDIT 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. Requried Item: 1. Plans (1' - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (it applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Forebay (if applicable), - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), and - Boundaries of drainage easement. 2. Plan details (1' = 30' or larger) for the level spreader showing: - Forebay (if applicable), - High flow bypass system, - One foot topo lines between the level lip and top of stream bank, - Proposed drainage easement, and - Design at ultimate build -out. 3. Section view of the level spreader (1' = 20' or larger) showing: - Underdrain system (if applicable), -Level lip, - Upslope channel, and - Downslope filter fabric. 4. Plan details of the flow splitting device and supporting calculations (if applicable). 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. 6. If a non -engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. 7. The supporting calculations. S. A copy of the signed and notarized operation and maintenance (0&M) agreement. Initials Page or plan sheet number and any notes: 02 Form SW401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3 oFWArpF �= o� A A rNCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT This form must be completely filled out, printed, initialed, and submitted. I. PROJECT INFORMATION Project name P1349 Special Operations Training Complex Contact name David Towler Phone number 910-451-3238 Date January 28, 2014 Drainage area number 2 (LS 56) II. DESIGN INFORMATION The purpose of the LS-VFS Other: Explained below Stormwater enters LS-VFS from The drainage area Type of VFS Engineered filter strip (graded 8 sodded, slope <8 %) Explanation of any "Other" responses above Bypassed flow from Sand Filter If Stormwater Enters the LS-VFS from the Drainage Area Drainage area 82,052 f, Impervious surface area 18,422 f, Percent impervious 22.45 Rational C coefficient 0.45 Peak flow from the 1 iNhr storm 0.85 cfs Time of concentration 15.00 min Please provide calculations for lc. Rainfall intensity, 10-yr storm 6.3 inmr Peak flow from the 10-yr storm 5.34 CIS Design storm Other: Explained below Maximum amount of flow directed to the LS-VFS 1.95 CIS Is a flow bypass system going to be used? Y (Y or N) Explanation of any "Other" responses above Flow bypassed from 1-yr, 24-hour storm from sand filter If Stormwater Enters the LS-VFS from a BMP Do not complete this section of the form. Type of BMP Pick one: Peak discharge from the BMP during the design storm cfs Peak discharge from the BMP during the 10-year storm cfs Do not complete this section of the form. Maximum capacity of a 100-foot long LS-VFS 10 cfs Peak flow directed to the LS-VFS cfs Do not complete this section of the form. Is a flow bypass system going to be used? (Y or N) Explanation of any "Other" responses above Form SW401 - LS-VFS - 2gJune2012 - Rev.10 page 1 of 3 If 1 LS-VFS Design Forebay surface area Depth of forebay at stormwater entry point Depth of forebay at stormwater exit point Feet of level lip needed per cfs Computed minimum length of the level lip needed Length of level lip provided Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below): M B W y (flow depth for 10-year storm) freeboard (during the 10-year storm) Peak velocity in the channel during the 10-yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any 'Other' responses above 128 sq ft Forebay is adequately sized. 34 in 12 in Depth is appropriate. 10 fNcfs 20 it 40 ft 50 1t 26.80 fmsl 24.20 fmsl 5.20 N (Y or N) OK Y (Y or N) Y (Y or N) Y (Y or N) Please provide plan details of flow splitter & supporting calcs. 3.00 it 2.00 it 8.00 it NIA ft NIA It 0.61 ft/sec Grass N (Y or N) Y (Y or N) This is overflow only, the 10-year storm event does not enter into the LS \\' ♦ B 1 Form SW401 - LS-VFS - 29June2012 - Rev.10 page 2 of 3 III. REQUIRED ITEMS CHECKLIST k6lT 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. Requried Item: I iti s Page or plan sheet number and any notes: 1. Plans (1"- 50' or larger) of the entire site showing: CS-001 - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Forebay (if applicable), - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), and - Boundaries of drainage easement. 2. Plan details (1' = 30' or larger) for the level spreader showing: - Forebay (if applicable), - High flow bypass system, - One foot topo lines between the level lip and top of stream bank, - Proposed drainage easement, and - Design at ultimate build -out. 3. Section view of the level spreader (V = 20' cr larger) showing: - Underdrain system (if applicable), -Level lip, - Upslope channel, and - Downslope filter fabric. 4. Plan details of the flow splitting device and supporting calculations (if applicable). 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. 6. If a non -engineered VFS is being used, then provide a photograph of the VFS shoving that no draws are present. 7. The supporting calculations. 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. C-501 Form SW401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3 wAtE9 NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT This form must be completely filled out, printed, initialed, and submitted. I. PROJECT INFORMATION Project name P1349 Special Operations Training Complex Contact name David Towier Phone number 910.451.3238 Date January 28, 2014 Drainage area number 3 (LS 38) II. DESIGN INFORMATION The purpose of the LS-VFS Other: Explained below Stormwater enters LS-VFS from The drainage area Type of VFS Engineered filter strip (graded & sodded, slope c 8 % ) Explanation of any "Other" responses above Bypassed flow from sand filter If Stormwater Enters the LS-VFS from the Drainage Area Drainage area 130,783 fe Impervious surface area 56,731 f? Percent impervious 43.38 Rational C coefficient 0.56 Peak flow from the l in/hr storm 1.68 cfs Time of concentration 18.00 min Please provide calculations for to. Rainfall intensity, 10-yr storm 5.7 inrhr Peak flow from the 10-yr storm 9.58 cfs Design storm Other: Explained below Maximum amount of flow directed to the LS-VFS 3 cfs Is a flow bypass system going to be used? Y (Y or N) Explanation of any "Other' responses above Flow bypassed from 1-yr, 24-ham storm from sand filter If Stormwater Enters the LS-VFS from a BMP Type of BMP Peak discharge from the BMP during the design storm Peak discharge from the BMP during the 10-year stone Maximum capacity of a 100-foot long LS-VFS Peak flaw directed to the LS-VFS Is a flow bypass system going to be used? Explanation of any "Other" responses above Do not complete this section of the form. Pick one: cfs cfs Do not complete this section of the form. 10 cfs cfs Do not complete this section of the form. (Y or N) ECEIVE JAN 3 12014 BY:--�_ Form SW401 - LS-VFS - 29June2012 - Rev.10 page 1 of 3 LS-VFS Design Forebay surface area Depth of forebay at stormwater entry point Depth of Forebay at stormwater exit point Feet of level lip needed per cts Computed minimum length of the level lip needed Length of level lip provided Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below). M B W y (flow depth for 10-year storm) freeboard (during the 10-year storm) Peak velocity in the channel during the 10-yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any "Other" responses above 128 sq ft Forebay is adequately sized. 32 in 12 in Depth is appropriate. 10 fVcfs 30 It 67 It 50 ft 22.80 fmsl 22.00 fmsl 1.60 N (Y or N) OK Y (Y or N) Y (Y or N) Y (Y or N) Please provide plan details of flow spliffer & supporting calcs. 2.00 It 8.00 It N/A ft N/A ft 0.29 ft/sec Grass N/A (Y or N) Y (Y or N) System is for overflow only. Not 10-year storm. \\ J F3 Form SW401 - LS-VFS - 29June2012 - Rev.10 page 2 of 3 III. P.QUIRED ITEMS CHECKLIST EDIT 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. Requried Item: 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), - Forebay (if applicable), - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), and - Boundaries of drainage easement. 2. Plan details (1' = 30' or larger) for the level spreader showing: - Forebay (if applicable), - High flow bypass system, - One foot topo lines between the level lip and top of stream bank, - Proposed drainage easement, and - Design at ultimate build -out. 3. Section view of the level spreader (1"= 20' or larger) showing: - Underdrain system (if applicable), - Level lip, - Upslope channel, and - Downslope filter fabric. 4. Plan details of the flow splitting device and supporting calculations (if applicable). 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. 6. If a non -engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. 7. The supporting calculations. B. A copy of the signed and notarized operation and maintenance (0&M) agreement. Page or plan sheet number and any notes: 02 Form SW 401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3 SLJr�/�oi�� ©�� 020E WAiFgOG �� 5ENR ` STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT This form must be completely filled out, printed, initialed, and submitted. I. PROJECT INFORMATION Project name P1349 Special Operations Training Complex Contact name David Towler Phone number 910.451.3238 Date January 28, 2014 Drainage area number 3 (LS 42) II. DESIGN INFORMATION The purpose of the LS-VFS Other: Explained below Stormwater enters LS-VFS from A BMP Type of VFS Engineered filter strip (graded & sodded, slope <8 % ) Explanation of any "Other' responses above Discharge from sand filter underdrains If Stormwater Enters the LS-VFS from the Drainage Area Drainage area ft' Do not complete this section of the form. Impervious surface area fe Do not complete this section of the form. Percent impervious % Do not complete this section of the form. Rational C coefficient Do not complete this section of the form. Peak flow from the 1 inlhr storm cfs Do not complete this section of the form. Time of concentration min Do not complete this section of the form. Rainfall intensity, 10yr storm in/hr Do not complete this section of the form. Peak flow from the 10-yr storm cis Do not complete this section of the form. Design storm Maximum amount of flow directed to the LS-VFS cfs Do not complete this section of the torn. Is a flow bypass system going to be used? (Y or N) Do not complete this section of the form. Explanation of any "Other" responses above If Stormwater Enters the LS-VFS from a BMP Type of BMP Other: Explained below Peak discharge from the BMP during the design storm 0.42 cfs Peak discharge from the BMP during the 10-year storm NA cfs Maximum rapacity of a 100-foot long LS-VFS 10 cfs Peak flow directed to the LS-VFS 0.42 cfs Is a flow bypass system going to be used? N (Y or N) A bypass system is required for the excess flow. Explanation of any "Other" responses above Sand filter Form SW401 - LS-VFS - 29June2012 - Rev.10 page 1 of 3 LS-VFS Design Forebay, surface area Depth of forebay at stormwater entry point Depth of forebay at sformwater exit point Feet of level lip needed per cts Computed minimum length of the level lip needed Length of level lip provided Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below): M B W y (flow depth for 10-year storm) freeboard (during the 10-year storm) Peak velocity in the channel during the 10-yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any 'Other" responses above 128 sq ft No forebay is required. 32 in 12 in Depth is appropriate. 10 fucfs 4 ft Ten feet is the minimum level spreader length. 16 ft 60 ft 22.80 fmsl 22.00 fmsl 1.60 N (Y or N) OK Y (Y or N) Y (Y or N) Y (Y or N) Please provide plan details of flow splifter 8 supporting calcs. 2.00 ft 8.00 It NIA ft NIA ft NIA ft/sec Grass N (Y or N) Y (Y or N) System is for underdrain flow only. Not 10-year storm. W ♦ B Form SW401 - LS-VFS - 29June2012 - Rev.10 page 2 of 3 III. REQUIRED ITEMS CHECKLIST 11 EDIT 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. Requried Item: 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), - Forebay (if applicable), - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), and - Boundaries of drainage easement. 2. Plan details (1"= 30' or larger) for the level spreader showing: - Forebay (if applicable), - High flow bypass system, - One foot tope lines between the level lip and top of stream bank, - Proposed drainage easement, and - Design at ultimate build -out. 3. Section view of the level spreader (1' = 20' or larger) showing: - Underdrain system (if applicable), - Level lip, - Upslope channel, and - Downslope filter fabric. 4. Plan details of the flow splitting device and supporting calculations (if applicable). 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. 6. If a non -engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. 7. The supporting calculations. 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. Page or plan sheet number and any notes: CS-001 Form SW 401 - LS-VFS - 2gJune2012 - Rev.10 page 3 of 3 1111 e J1i 1\� 10:19:06 12-28-2018 6 /9 03-04-'14 09:41 FROM- V/ T-636 1`0008/0009 F-933 Permil No, SW8 140122 P1349 Special Ops Training Complex Site #1 Stormwater Penult No. SWt3140122 Onslow Countv Doaigner's Cortificatlon Page 1 -of� I .. DEC 2 8 2013 1, Mary Ann DuRant as a duly registered Professional Engineer In Virginia the State of , having been authorized to observe (periodicallyA 4OWFthe construction of the project, P-1349 Train for Commanding Officer, MCB Camp Lejeunc(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 bulftwithin 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: Slgnature _ A,1� Registration Number VA 037452 Date December 10, 2018 Page 7 of.8 SEAL (Not Required) �t 10:19. 20 12-28-2018 719 1' 03-04-'14 09:41 FROM- _ T-690 P0009/0009 F-933 Permit No. SM 140122 Certification Requirements: Page 2 of 2 1. The drainage area to the system contains approximately the permitted acreage. E,D_2. The drainage area to the system contains no more than the permitted amount of built -upon area. A�3, All the bullt-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. S. 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. 11,r r,J-�n� 8. For open sand filters, all slopes are grassed with permanent vegetation. g. Vegetated slopes are no steeper than 3:1. 10. The.inlets are located per the approved plans and do not cause short- circulting of the system. 11. The permitted amounts of surface area and/or volume have been �AA provided. r `t� 12. Required drawdown devices are correctly sized and located per the approved plans. Phi 13. All required design depths are provided. 00 14. All required parts of the system are provided, such as a vegetated shelf, a forebay, and the vegetated filter. . kb IS.. The required dimensions of the system are provided, per the approved plan. cc, NCDENR-DEMLR Regional Office 0V1f_. DEC 2 8 2018 i $Y' Page a of a