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HomeMy WebLinkAboutSW8130112_CURRENT PERMIT_20210730STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 lap 12 DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2U21 o-, YYYYMMDD ROY COOPER Governor DIONNE DEW -GATT BRIAN WRENN Director July 30, 2021 Marine Corps Base Camp Lejeune Attn: Neal Paul, Deputy Public Works Officer 1005 Michael Road Camp Lejeune, NC 28547 NORTH CAROUNA Ertrhonmeatat Quality Subject: Permit Renewal State Stormwater Management Permit No. SW8 130112 P1253 2D Combat Engineer Battalion Ops Maintenance Complex Onslow County Dear Mr. Paul: Effective August 1, 2013 the State Stormwater program has been transferred from the Division of Water Quality (D WQ) to the Division of Energy, Mineral and Land Resources (DEMLR). All previous references to D WQ will remain in older stormwater permits issued prior to August 1, 2013 until they are modified. Please note that this permit will now reference DEMLR as the Division responsible for issuance of the permit. The Wilmington Regional Office received a complete 8 year Stormwater Management Permit Renewal Application for the subject project on July 27, 2021. The Division is hereby notifying you that permit SW8 130112 has been renewed on July 30, 2021, and shall be effective until March 6, 2029. For your records, please find enclosed a renewed, updated, and re -issued permit and a copy of the renewal application. Please keep this permit on file at all times. Please note that the renewed, updated, and re -issued permit does not impose new or different terms; it merely restates some of the previous terms to provide you with a better understanding of your obligations under the permit. The renewal and reissuance of this stormwater permit does not imply that the site is currently in compliance with the terms and conditions of this state stormwater permit. The plans originally approved on March 6, 2013 will remain in full force and effect in accordance with the regulations set forth in Title 15A NCAC 2H.1000. This permit is subject to the conditions and limitations as specified therein. Please pay special attention to the conditions listed in this permit regarding the Operation and Maintenance of the BMP(s), recordation of deed restrictions, procedures for changes of ownership, transferring the permit, and renewing the permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system, to record deed restrictions, to transfer the permit, or to renew the permit, will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes and must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding. If you have any questions, need additional copies of the permit or approved plans, please contact Ashley Smith in the Wilmington Regional Office, at (910) 796-7215 or ashleym.smith@ncdenr.gov. Sincerely, Brian Wrenn, Director Division of Energy, Mineral and Land Resources ®� North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington. North Carolina 28405 910.796.7215 wam cua w State Stormwater Permit No. SW8 130112 Page 2 of 2 Enclosures: DES/arcs: cc: Attachment C — Permitting History Renewal Application Documents %Stormwater\Permits & Projects\2013\130112 HDt2021 06 permit 130112 NCDEQ-DEMLR Wilmington Regional Office ® � AV kJ� North Carolina Department of Environmental Quality I Division of Energy, Kinerai and Land Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington. North Carolina 28405 .Rmv r�aouu. ^+.d..•�o.w� / 910.796.7215 State Stormwater Management Systems Permit No. SW8 130112 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY COMMERCIAL DEVELOPMENT SA WATERS 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 US MCB Camp Lejeune P-1253 2D Combat Engineer Battalion Ops / Maintenance Complex Snead's Ferry Road (NC 172), Camp Lejeune, Onslow County FOR THE construction, operation and maintenance of two (2) wet detention ponds discharging to Class SA waters in compliance with the provisions of 15A NCAC 2H .1000 and Session Law 2008-211 (hereafter collectively referred to as the "stormwater rules') the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR") and considered an enforceable part of this permit. This permit shall be effective from the date of issuance until March 6, 2029, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.12 and 13 on page 3 of this permit. The stormwater controls labeled DA1 and DA2 have been designed to handle the runoff from 1,164,859 and 585,393 square feet of impervious area, respectively. 3. The drainage areas will be limited to the amount of built -upon area indicated in Sections 1.2 and 1.12 of this permit, and per approved plans. 4. The volume in excess of the design storm from the wet pond must flow overland through a level spreader and 50-foot vegetated filter strip designed to pass the peak flow from the 10 year storm in a diffuse, non -erosive manner. Page 1 of 6 State Stormwater Management Systems Permit No. SW8 130112 5. An alternative design has been proposed for the level spreaders and vegetated filter strips required to handle the volume in excess of the design storm from the wet detention ponds. Based on the sealed and signed professional engineers statement and plans, the Division is allowing this design. If the level spreader and filter strip design are found to not meet the intent of the stormwater rules and/or are found to cause erosion or channelized flow, the permit holder will be required to install the bypass system as recommended by the NC BMP Manual or propose another alternative design. Upon completion of construction and certification of the system and continuing for a period of 3 years, the permittee shall submit to the Division quarterly reports for the level spreaders and filter strips to the attention of either the State Stormwater Supervisor or the lead Stormwater Engineer in the Wilmington Regional Office. These level spreaders and filter strips have been approved as an alternative design and therefore it must be demonstrated that they are functioning as designed. The quarterly reports must include photos documenting the current condition of the level spreader and filter strip as well as describe the maintenance performed. After 3 years of compliant reporting, the permittee may submit a request to the Division to lift the quarterly report requirement. The request must include supporting documentation such as rainfall records and photos demonstrating that the system can accommodate the larger design flows without erosion of channelization. In addition to the stormwater system, there is an approximately 5.5 acre 'dig pit' that will be continuously disturbed for equipment training operations. This pit has been designed to function as a large sediment basin with an overflow pipe set at an elevation 3 feet above the bottom of the pit. It has been demonstrated that the 10-year, 24-hour storm event will be able to infiltrate within the pit area and thus will not create a discharge to SA waters as prohibited by Session Law 2008-211. A 50' wide vegetative buffer must be provided and maintained adjacent surface waters, measured horizontally from and perpendicular to the normal pool of impounded structures, the top of bank of both sides of streams and rivers and the mean high water line of tidal waters. 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 required easements. 10. The runoff from all built -upon area within the permitted drainage area(s) of this project must be directed into the permitted stormwater control system. 11. The additional rainwater harvesting system shown on the plans has not been demonstrated to meet the State Stormwater BMP design requirements and therefore is not considered a part of the approved state stormwater treatment system. This additional measure is incorporated only by reference and is not an enforceable part of the permit. Page 2 of 6 State Stormwater Management Systems Permit No. SW8 130112 12. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: Design Criteria DA7 DA2 a. Drainage Area, acres: Onsite, ft2: Offsite, ft2: 35.94 1,565,484 0 15.33 667,956 0 b. Total Impervious Surfaces, ft : Onsite, ft2: Offsite, ft2: 1,164,859 1,164,859 0 585,393 585,393 0 d. Design Storm, in: 3.8 3.8 e. Average Design Depth, ft: 7.5 7.0 f. TSS Removal Efficiency: 90% 90% Permanent Pool Elev., FMSL: 24.5 22.5 h. Perm. Pool Surface Area, ft2: 47,621 40,700 i. Permitted Storage Volume, ft3: 324,753 167,008 . Temporary Storage Elev., FMSL: 30.1 26.0 k. Pre-dev. 1- r, 24-hr Discharge Rate, cfs: 3.08 3.94 I. Controlling Orifice , (V Inches: 5.0 4.0 m. Orifice Flow Rate, cfs: 0.90 0.45 n. Permitted Foreba Volume, ft3: 72,982 60,882 o. Max. Fountain HP: 1 1 p. Receiving Stream/River Basin Courthouse Bay / White Oak q. Stream Index Number 19-36 r. Classification of Water Body SA; HQW 13. The design storm volume discharged from the wet detention pond must be directed to a secondary BMP in series with the wet detention pond. The secondary BMPs provided to treat the discharge from each wet detention pond are infiltration basins, and the following design criteria have been provided in the secondary BMP and must be maintained at design condition: Design Criteria DA1 DA2 a. Design Flow Rate, cfs: 0.9 0.45 b. Basin Depth, ft: 1.5 1.0 c. Bottom Elevation, FMSL: 23.5 22.0 d. Bottom Surface Area, ft2: 5,148 6,485 e. Bypass Weir Elevation, FMSL: 25.0 23.0 f. Permitted Storage Volume, ft3: 9,768 7,307 g. Type of Soil: Leon Wando In. Expected Infiltration Rate, in/hr: 12.0 8.85 i. Seasonal High Water Table, FMSL: 21.5 19.98 Time to Drawdown, hours, 4.18 4.17 11. SCHEDULE OF COMPLIANCE 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. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, the permittee shall cause a certification from an appropriate designer for the system installed to be submitted, 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. Page 3 of 6 State Stormwater Management Systems Permit No. SW8 130112 4. If the permanent pool volume is greater than 30,000 cubic feet, decorative spray fountains are allowed in the pond, subject to the following criteria: a. The minimum permanent pool volume is 30,000 cubic feet. b. The fountain must draw its water from less than 2' below the permanent pool surface. C. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. d. The fountain may not be placed into the forebay. e. The falling water from the fountain must be centered in the main pond, away from the shoreline. f. The maximum horsepower for a fountain in either pond 1 or pond 2 is 1 horsepower. 5. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at the design condition. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals. 6. 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. 7. 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. 8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 9. Clear access to the stormwater facilities for inspection and maintenance shall be maintained via appropriately recorded easements. Page 4 of 6 State Stormwater Management Systems Permit No. SW8 130112 10, 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. 11. 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. 12. 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. Any items not in compliance must be repaired, replaced restored, or resolved prior to the transfer. Records of maintenance activities performed to date may be requested. III. GENERAL CONDITIONS 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. 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. 3. 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. Page 5 of 6 State Stormwater Management Systems Permit No. SW8 130112 Permit Transfer: This permit is not transferable to any person or entity except after notice to and approval by the Director. The permittee shall submit a completed and signed "Permit Transfer Application Form" (available on the Division website) accompanied by the required fee and supporting documentation as listed on the form, to the Division at least 60 days prior to any one or more of the following events: a. The sale or conveyance of the project area in whole or in part, except in the case of an individual lot sale that is made subject to the recorded deed restrictions and protective covenants; b. Dissolution of the partnership, corporate, or LLC entity, subject to NCGS 55-14-05 or NCGS 57D-6-07 and 08; C. Bankruptcy; d. Foreclosure, subject to the requirements of Session Law 2013-121, Current Permittee Name or Address Changes: The permittee shall submit a completed "Permit Information Update Application Form" (available on the Division website) to the Division within 30 days to making any one or more of the following changes: a. A name change of the current permittee; b. A name change of the project; C. A mailing address change of the permittee; 6. The permittee is responsible for compliance with all terms and conditions of this permit until the Division approves the transfer request. Neither the sale of the project, in whole or in part, nor the conveyance of common area to a third party constitutes an approved transfer of the permit. 7. The permittee grants Division Staff permission to enter the property during normal business hours to inspect all components of the permitted project. 8. The permit issued shall continue in force and effect until the permittee files a request with the Division for a permit modification, transfer, renewal, or rescission, however, these actions do not stay any permit conditions. 9. Approved plans, application documents, supplements, calculations, operation and maintenance agreement, and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of this permit, application, supplements, operation and maintenance agreement, and approved plans and specifications shall be maintained on file by the permittee. 10. Unless specified elsewhere, permanent seeding requirements for the on -site stormwater system must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 11. 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. 12. A permit renewal request must be submitted at least 180 days prior to the expiration date of this permit. The renewal request must include the appropriate application, documentation and the processing fee as outlined in Title 15A NCAC 02H.1045(3). Permit renewed, updated and reissued this the 30th day of July 2021. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION C� 20 .�7,; rian�6irect r Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Page 6 of 6 Attachment C - Permitting History P1253 2D Combat Engineer Battalion Ops Maintenance Complex Permit No. SW8 130112 'Approval Date ' Permit Action BIMS Version Description of the Changes 3/6/2013 Original Approval 1.0 7/30/2021 Renewal 2.0 Permit Number:�— (to be prow ided by DWQ) Drainage Area Number: Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): does ® does not incorporate pretreatment other than a foreu yI .AN 2 3 2013 } Important maintenance procedures: BY' — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate the problerru. The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet detention basin Areas of bare soil and/or erosive gullies have formed. Regrade the soil if necessary to remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or swale The pipe is clogged. Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the Swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to a depth greater than the Search for the source of the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying, problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray, the basin surface. JAN232013 ?) Form SW40I-Wet Detention Basin O&M-Rev.4 Page 2 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. (if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 12.5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 12.5 feet in the forebay, the sediment shall be removed. Sediment Removal Bottom BASIN DIAGRAM (fill in the blanks) 12 Pe manen Volume I I ft Min. Sediment Storage FOREBAY Form SW401-Wet Detention Basin O&M-Rev.4 Permanent Pool Elevation 24.5 Pool Sediment Removal Elevation 12 --------------------- Bottom Elevation MAIN POND FEB 15 2013 By:_--------- Page 3 of 4 1-ft Storage 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. Project name:P1253 2D COMBAT ENGINEER BATTALION OPSIMAINTENANCE BMP drainage area number: Print name:NEAL PAUL Tltle:DEPUTY PUBLIC WORKS DIRECTOR Address:1005 MICHAEL ROAD CAMP LEJEUNE NC 28542 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,�9 ,k�'J� ) 1UV,I I , a Notary Public for the State of of WA`bJU ''U , do hereby certify that Q �U� personally appeared before me this LO day of\ , 201"), and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, KELLEY Vkti,40E', )EVERINGI NcrrpRt ��L,Gt.,0 Of4SLU�v GCUNTY STaYa ;10, K(;Ofk G a.ROLINA SEAL My commission rJ CAN 2 3 2013 Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 Permit Number: 's14_�' (to be provi d by DVVQ) Drainage Area Number: Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the. flushing of sediment through the emergency drain should be minimiired to0the 1 , maximum extent practical. BAN 2 3 200 — Once a year, a dam safety, expert should inspect the embankment. t� After the wet detention pond is established, it should be inspected once a morith and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of long. approximately sik inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page I of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to a depth greater than the original design depth for sediment storage. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to a depth greater than the original design sediment Search for the source of the sediment and remedy the problem if possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over 50% of the area. Consult a professional to remove and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. JAN 2 3 2013 Form SW40I-Wet Detention Basin O&M-Rev.4 j3'f:_------Page 2 of 4 Permit Number: (to be provided by, DWQ) Drainage Area Number: Sediment Removal EX. 12 1 Pe maven Pool Elevatio Form SW401-Wet Detention Basin O&M-Rev.4 _______ __ Volume Bottom BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. (if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of damage have occurred at the Contact the local NC Division of Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 10.5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 10.5 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 22.5 Sediment Removal Elevationl2 tVolume I I -ft Min. Sediment Storage FOREBAY Bottom Elevation I I I I -ft n Sedtmet Storage MAIN POND 1AN232013 Page 3 of 4 Permit Number: (to be provided by DWQ) 1 acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:P1253 2D COMBAT ENGINEER BATTALION OPS/MAINTENANCE BMP drainage area number: POND 2 Print name:NEAL PAUL Title:DEPUTY PUBLIC WORKS DIRECTOR Address:1005 MICHAEL ROAD CAMP LEJEUNE NC 28542 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 0Un Wt6l�hkounty of (AM) 161 /V , do hereby certify that personally appeared before me this 10 day of 3cmvm8k, Lv l J, and acknowledge the due execution of the forgoing wet detention basin maintenance reyu seal, /__' _�\^ NOTARY PUBLIC ONGLOW COUNTY STAfE Ole NORTH CAROLINA SEAL My commission expires r rV ECEU E JAN 2 3 2013 a BY• Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 :.LViik �1P(i;: .eta !'i �.i �'�`.�)'�,r:~'. ,',lry°•, a Permit Number:�— (to be provided by DWQ) Drainage Area Number:__ Infiltration Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — The drainage area will be carefully managed to reduce the sediment load to the infiltration basin. — Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the vegetation. — The vegetation in and around the basin will be maintained at a height of approximately six inches. After the infiltration basin is established, it will be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance 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 BMP Trash/debris is present. Remove the trash/debris. The perimeter of the infiltration basin Areas of bare soil and/or erosive gullies have formed. Regrade the soil if necessary to remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. The inlet device: pipe or swale The pipe is clogged (if applicable). Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. rJCAN cEuvE 2 3 2013 Form SW401-Infiltration Basin O&M-Rev.3 Page 1 of 3 BMP Sediment has accumulated and reduced the depth to 75% of the original design depth. Erosion has occurred or riprap is displaced. are present. The main treatment area A visible layer of sediment has accumulated. The outlet receiving water Water is standing more than 5 days after a storm event. Weeds and noxious plants are growing in the main treatment area. Shrubs or trees have started to grow on the embankment. An annual inspection by an appropriate professional shows that the embankment needs repair. Clogging has occurred The outlet device is damaged Erosion or other signs of damage have occurred at the outlet. Bli Form SW401-Infiltration Basin O&M-Rev.3 How I will remediate the problem: Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather than Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Replace any media that was removed in the process. Revegetate disturbed areas Replace the top few inches of filter media and see if this corrects the standing water problem. If so, revegetate immediately. If not, consult an appropriate professional for a more extensive repair. Remove the plants by hand or by wiping them with pesticide (do not Remove shrubs or trees needed repairs. Clean out the outlet device. Dispos of the sediment off -site. Repair or replace the outlet device. Contact the NC Division of Water Quality 401 Oversight Unit at 919- JAN 7 3 2013 Page 2 of 3 Permit (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:P1253 2D COMBAT ENGINEER BATTALION OPS/MAINTENANCE BMP drainage area number: INFILTRATION BASIN I Print name:NEAL PAUL Title:DEPUTY PUBLIC WORKS DIRECTOR Address:1005 MICHAEL ROAD CAMP LEJEUNE NC 28542 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. ml V as Notary Public for the State of of " ) ^' do hereby certify that personally appeared before me this day of JGv\, _and acknowledge the due execution of the forgoing infiltration basin maintenance requiremets. Witness my,�and.ana official .LEY VANDECOEVERIN NOTARY PUBLIC ONSLOW COUNTY STATE OF NORTH CAROLINA SEAL My commission expires Jk rJ �CEOVE AN 2 3 2013 Form SW401-Infiltration Basin O&M-Rev.3 Page 3 of 3 ,j r Permit Number:.���/✓y�-��/'�� (to be provided b DWQ) Drainage Area Number: Infiltration Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — The drainage area will be carefully managed to reduce the sediment load to the infiltration basin. — Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the vegetation. — The vegetation in and around the basin.will be maintained at a height of approximately six inches. After the infiltration basin is established, it will be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.3 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 BMP Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to infiltration basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. The inlet device: pipe or Swale The pipe is clogged (if applicable). Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Form SW401-Infiltration Basin O&M-Rev.3 r eL.r E S V E JAN 2 3 200 1 Page I of 3 BMP element: Potentialproblem: How I will remediate theproblem: The forebay Sediment has accumulated and reduced the depth to 75% Search for the source of the sediment and remedy the problem if of the original design depth. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred or Provide additional erosion riprap is displaced. 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 pesticides are used, wipe them on the plants rather than s r a i n. The main treatment area A visible layer of sediment has accumulated. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Replace any media that was removed in the process. Revegetate disturbed areas immediately. Water is standing more than Replace the top few inches of filter 5 days after a storm event. media and see if this corrects the standing water problem. If so, revegetate immediately. If not, consult an appropriate professional for a more extensive repair. Weeds and noxious plants are Remove the plants by hand or by growing in the main wiping them with pesticide (do not treatment area. spray). The embankment Shrubs or trees have started Remove shrubs or trees to grow on the embankment. immediately. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs re air. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. rJ OFIVFAN 2 3 2013 Form SW401-Infiltration Basin O&M-Rev.3 Page 2 of 3 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. Project name:P1253 2D COMBAT ENGINEER BATTALION OPS/MAINTENANCE BMP drainage area number: INFILTRATION BASIN 2 Print name:NEAL PAUL Tltle:DEPUTY PUBLIC WORKS DIRECTOR Address:1005 MICHAEL ROAD CAMP LEJEUNE NC, 28542 Note: The legally res onsible party should not be a homeowners association unless more than 50% of the to s ve een sold and a resident of the subdivision has been named the president. [4 byl , a Notary Public for the State of County of do hereby certify that �V 1 personally appeared before me this day ofJ \410 a ` / 11� , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. ) /itness my hand and official seal, KELLEY VANDECOEVERI✓ )k? NOTARY PUBLIC ONSLOW COUNTY STATE OF NORTH CAROLINA JAN 2 3 2013 SEAL My commission expires Form SW401-Infiltration Basin O&M-Rev.3 Page 3 of 3 1-- 1 ­J 111403 NOJIACI f. AWJOSAt4TPOV F. I b � -, 'it r, Permit Number: (m be 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 BMP. 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. system The flow splitter device The flow splitter 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. ,:ECEIVE FEB 9 4 200 Form SWU401-1-evel Spreader, Filter Strip, Restored Riparian Buffer O&M -Rev., Page l of 3 BMP element: Potentialproblem: How I will remediate theproblem: The swale and the level The swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise dama ed. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the level lip, and shows stormwater has then plant aground cover and - bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the swale or just downslo e of the level lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish - the erosion control material. _ The filter strip Grass is too short or too long Maintain grass at a height of if applicable . approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. - problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet. 1 401 Oversight Unit at 919-733-1786. Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 ECEIVE FEB 942013 Byl Page 2 of 3 Permit Number: (Io 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. 1 agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:P1253 2D COMBAT ENGINEER BATTALION �r.(t BMP drainage area number:LS-VFS I L5;—VF,5! Print name:NEALPAUL Tltle:DEPUTY PUBLIC WORKS DIRECTOR Address:1005 MICHAEL ROAD, CAMP LEJEUNE NC. 28542 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 County of i<<�jlf-� do hereby certify that personally appeared before me this day of, and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. Witness my hand and official seal, LMI ETTEctyroina SEAL My commission expires FEB 14 2M3 Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3_ of 3 UEMLH USE UNLY i Date Re eived Fee Paid Permit Number 57s, ' S—' ollC�2 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 130112 2. Project name: P-1253 2D Combat Engineer Battalion Ops/Maintenance Complex HIQh Density Commerical Wet Detention Pond Proiect (Class SA Waters) 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 for a Major Modification or Minor Modification Application form available at: https://deg.nc.gov/about/divisions/e 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.goy/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 Le'eune 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 JUL 2 7 2021 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: HEB 1. A permit application processing fee of $505.00 payable to NCDEQ. HEB 2. One original signed hard copy and one electronic copy of this completed form. The signing official named on this application to represent the current permittee must meet one of the following: a. Corporation — a principle executive officer of at least the level of vice-president; b. Limited Liability Company (LLC) — a manager or company official as those terms are defined in G.S. 57D "North Carolina Limited Liability Company Act;" c. Public Entity— a principal executive officer, ranking official, or other duly authorized employee; d. Partnership or limited partnership — the general partner; e. Sole proprietor; or f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity. HEB 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. HEB 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 ❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a copy be sent to me. I agree to keep this on file with the permit. HEB 5. Designer Certifications, Please select one: ® A copy of the certification(s) confirming that the project was built in accordance with the approved plans have been previously provided to the Division; or ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans are enclosed; or ❑ The project has not yet been built. 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a signed, sealed, and dated letter from a licensed professional stating that the SCMs have been inspected, and that they have been built and maintained in accordance with the permit. 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide one hard copy and one electronic copy of documentation from the NC Secretary of State, or other official documentation, which supports the titles and positions held by the persons listed in Section C.2 per 15A NCAC 2H. 1043(3)(b). https://www.sosnc.gov/online services/search/by title/ Business Registration 77 ­\ 1 gyp_ JUL 2 7 2021 tormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018 .i D. PERMITTEEE'�'S11 A CERTIFICATION I, JZo W� . 1,6_ dc►, 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, ownership. �Yr�b ation provided on this permit renewal application is, to the best of my knowledge, rrec ofcompl te. Signature: ( Date: l� 2 NOTARIZATION: that MOW _ this the exe�ytioAldf tagaforgoir NER Y day of Iam g instrument. Witness my hand -and official seal, a Notary Public for the State of , do hereby certify personally appeared before me , and acknowledge the due' ��•�d mr a:M JUL 2 7 2021 BY: Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 'hall, ........... 1; a Permit No. /v^' w lb)13� (to be provided by DWO) WDENR o " STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION -- „/ .,...- . •, Project name P1253 2D COMBAT ENGINEER BATTALION OPS/MAINTENANCE COMPLEX Contact person MATTHEW HALEY, PE Phone number 910-383.1044 Date 2/222013 Drainage area number POND 1 Ill., DESIGN! INFORMATION Site Characteristics Drainage area 1,565,484 fe Impervious area, post -development 1,164,859 ft' %impervious 74.41 % Design rainfall depth 1.5 in Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is the pre/post control of the lyr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHW( elevation (approx. at the perm. pool elevation) Top of 10h vegetated shelf elevation Bottom of 10ft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stored above the state -required temp. pool? Elevation of the top of the additional volume 140,831 ft' 36,225 ft' 359,998 h' 323,773 ft' 324,753 ft' Y (Y or N) 3.8 in 50.00 (unitless) 86.00 (unitless) 2.50in/hr OK 3.08 h'/sec 0.00 h3/9ec -3.08 n3lcpc 30.10 fmsl 24.50 fmsl 21.50 fmsl 25.00 fmsl 24.00 fmsl Data not needed for calculation option p1, but OK if provided. 12.00 fmsl 11.00 fmsl Data not needed for calculation option N1, but OK if provided. 1.00 h Y (Y or N) C ECEIV C 30.1 fmsl OK 6J C FEB 2 8 2013 BY; Form SW401-wet Detention Basin-Rev.9-4/la/12 Parts I. 611. Design Summary, Page 1 of 2 Permit (to be provided by DWD) 11.'DESIGN INFORMATION Surface Areas Area, temporary pool 66,636 ft' Area REQUIRED, permanent pool 39,607 ft SAIDA ratio 2.53 (unitless) Area PROVIDED; permanent pool, A,,,n ,,,, 47,621 fe OK Area, bottom of 1 Oft vegetated shelf, A,,., 42,985 ft Area, sediment cleanout top elevation (bottom of pond), Av„ ,,,, 8,719 it4� 9 Volumes Volume, temporary pool 324,753 ft' OK Volume, permanent pool, V,,,, ,,,i 357,985 tt' Volume, forebay (sum of forebays if more than one forebay) 72,982 ft' Forebay % of permanent pool volume 20.4% % OK SAIDA Table Data Design TSS removal 90 Coastal SAIDA Table Used? Y (Y or N) MountaindPiedmont SAIDA Table Used? N (Y or N) SAIDA ratio 2.53 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Y (Y or N) Volume, permanent pool, V„v j 357,985 ft' Area provided, permanent pool, A,,,,., 47,621 ft` Average depth calculated 7.52 ft OK Average depth used in SAIDA, d,,, (Round to nearest 0.5ft) 7.5 ft OK Calculation option 2 used? (See Figure 10-2b) N (Y or N) Area provided, permanent pool, A,,. 47,621 ft` Area, bottom of 1 Oft vegetated shelf, A,,, ,,,, 42,985 tt` Area, sediment cleanout, top elevation (bottom of pond), A,,,. 8,719 ft' 'Depth' (distance h/w bottom of 1Oft shelf and top of sediment) 12.00 it Average depth calculated ft Average depth used in SAIDA, d,,, (Round to down to nearest 0.5ft) ft Drawdown Calculations Drawdown through orifice? Y (Y or N) Diameter of orifice (if circular) 5.00 in Area of orifice (ibnoncircular) in' Coefficient of discharge (Cn) 0.60 (unitless) Driving head (H,) 1.87 ft Drawdown through weir? N (Y or N) Weir type (unitless) Coefficient of discharge (C„) (unitless) Length of weir (L) it Driving head (H) it Pre -development 1-yr, 24-hr peak flow 3.08 11 Post -development 1-yr, 24-hr peak flow 0.DO ft'/sec Storage volume discharge rate (through discharge orifice or weir) 0.90 ft'/sec Storage volume drawdown time 4.18 days Additional Information Vegetated side slopes 3 :1 Vegetated shelf slope 10 :1 Vegetated shelf width 10.0 ft Length of flowpalh to width ratio 3 :1 Length to width ratio 3.0 :1 Trash rack for overflow & orifice? Y (Y or N) Freeboard provided 2.0 ft Vegetated filter provided? N (Y or N) Recorded drainage easement provided? N (Y or N) Capures all runoff at ultimate build -out? Y (Y or N) Drain mechanism for maintenance or emergencies is: PORTABLE PUMP OK, draws down in 2-5 days. µsA 1ECEIVC OK R FEB 2 8 2013 OK tIJ OK OK BY. OK OK OK OK Insufficient. Recorded drainage easement required. OK Form SW401-Wet Detention Basin-Rev.9-4/18/12 Pans 1, a 11. Design Summary, Page 2 of 2 (to be provided by DWO) s r Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Paget Plan Initials Sheet No. AeNVA_ C— 400 1. Plans (1" - 50' or larger) of the entire site showing: -to C —44!& - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. C— 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: Outlet structure with trash rack or similar, Maintenance access, Permanent pool dimensions, Forebay and main pond with hardened emergency spillway, �� l� - Basin cross-section, for FEB 8 - Vegetation specification planting shelf, and 15 2013 - Filter strip. �K4 C— 3. Section view of the wet detention basin (1" = 20' or larger) showing: Side slopes, 3:1 or lower, Pretreatment and treatment areas, and Inlet and outlet structures. Wff fA— C- oo \ 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. MevA_ cALt. S 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay, to verify volume provided. 6WIA C-0 Q 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. 1t�c �D 7. The supporting calculations. WT} t N"visev;0 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. —.AIA— 9. A copy of the deed restrictions (if required). wirTA v i 1w 10, A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.9-4/18/12 Part III. Required Items Checklist, Page 1 of 1 Permit No. 5 `4 0 15Dti g- Ito be provided by DWOf ®�� 020E W A7F9OG r NCDENR � t STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. L PROJECT. INFORMATION ti -. .,:` ., . ,. 11,,.,._ Project name P12532D COMBAT ENGINEER BATTALION OPS/MAINTENANCE COMPLEX Contact person MATTHEW HALEY, PE Phone number 910-383-1044 Date 2222013 Drainage area number POND 2 111. DDESIGN INFORMATION Site Characteristics Drainage area 667,956 fe Impervious area, post -development 585,393 fe %impervious 87.64 Design rainfall depth 1.5 in Storage Volume: Noni Waters Minimum volume required 113 Volume provided f13 Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is the pre/post control of the lyr 24m storm peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the perm. pool elevation) Top of 10ft vegetated shelf elevation Bottom of 10ft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stored above the state -required temp. pool? Elevation of the top of the additional volume 70,031 fY3 13,346 ff3 178,814 ft' 165,468 It" 167,008 it' Y (Y or N) 3.8 in 50.00 (unitless) 90.00 (unitless) 2.50 Whir OK 3.94 ff3/sec 0.00 ff3/sec -3.94 ff3/sec 26.00 fmsl 22.50 fmsl 19.98 fmsl 23.00 fmsl 22.00 fmsl 12.00 fmsl 11.00 fmsl 1.00 It Y (Y or N) ECCO/ 'IE 26.0 fmsl OK C 1C FEB 2 8 2013 BY: Form SW401-Wet Detention Basin-Rev.9-4/18/12 Parts 1.811. Design Summary, Page 1 of 2 Permit ito be provided by DWD) II. DESIGN INFORMATION Surface Areas Area, temporary pool 52,427 fe Area REQUIRED, permanent pool 26,050 ff SAIDA ratio 3.90 (unitless) Area PROVIDED, permanent pool, A,._. 40,700 ft` OK Area, bottom of 10ft vegetated shelf, Am,", 37,895 e Area, sediment cleanout, top elevation (bottom of pond), Awjy ,, 9,228 ft°ez— '> Volumes Volume, temporary pool 167,008 ft3 OK Volume, permanent pool, V... 291,926 ft" Volume, forebay (sum of forebays if more than one forebay) 60,882 rya Forebay %of permanent pool volume - 20.9% % OK SAIDA Table Data Design TSS removal 90 % Coastal SAIDA Table Used? Y (Y or N) Mountain/Piedmont SAIDA Table Used? N (Y or N) SAIDA ratio 3.90 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) (Y or N) Volume, permanent pool, V... 291,926 W Area provided, permanent pool, A,,, p, 40,700 fe Average depth calculated 7.17 If OK Average depth used in SAIDA, d,,, (Round to nearest 0.5ft) 7.0 If OK Calculation option 2 used? (See Figure 10.2b) N (Y or N) Area provided, permanent pool, A,._., 40,700 tt` Area, bottom of 1 Oft vegetated shelf, A,,_,,,, 37,895 tt` Area, sediment cleanout, lop elevation (bottom of pond), Am, ,ana 9,228 f? 'Depth" (distance bAv bottom of 1 Oft shelf and top of sediment) 10.00 If Average depth calculated It Average depth used in SAIDA, it,,, (Round to down to nearest 0.5fq ft Drawdown Calculations Drawdown through orifice? Y (Y or N) Diameter of orifice (if circular) 4.00 in Area of orifice (if -non -circular) in Coefficient of discharge (Co) 0.60 (unitless) Driving head (Ho) 1.17 ft Drawdown through weir? N (Y or N) Weir type (unitless) Coefficient of discharge (C.„) (unitless) Length of weir (L) ft Driving head (H) ft Pre -development 1-yr, 24-hr peak flow 3.94 ft3lsec Post -development 1-yr, 24-hr peak flow 0.00 ft3lsec Storage volume discharge rate (through discharge orifice or weir) 0.45 ft3lsec OK, draws down in 2-5 days. CFIVE Storage volume drawdown time 4.17days Additional Information�1013 rFEBU L Vegetated side slopes 3 :1 OK Vegetated shelf slope 10 :1 OK Vegetated shelf width 10.0 If OK BY. Length of flowpath to width ratio 3 :1 OK Length to width ratio 3.0:1 OK Trash rack for overflow & orifice? Y (Y or N) OK Freeboard provided 4.0 ft OK Vegetated filter provided? N (Y or N) OK Recorded drainage easement provided? N (Y or N) Insufficient. Recorded drainage easement required. Capures all runoff at ultimate build -out? Y (Y or N) OK Drain mechanism for maintenance or emergencies is: PORTABLE PUMP Form SW401-Wet Detention Basin-Rev.9-4118112 Pans I. & II. Design Summary, Page 2 of 2 Permit (to be provided by DWQ) III VtRE0UIBED ITEMSjCHEGKLIST � 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. C-400 1. Plans (1" - 50' or larger) of the entire site showing: tv G—k17. - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. Ihfs} c7424- 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: Outlet structure with trash rack or similar, Maintenance access, Permanent pool dimensions, t� Forebay and main pond with hardened emergency spillway, Basin cross-section, Vegetation specification for planting shelf, and 1AN 2 3 2013 Filter strip. K74A C-424 3. Section view of the wet detention basin (1" = 20' or larger) showing: 3'!: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. VVT*A C_Do 1 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. VVII CAit-d-S 5. A table of elevations, areas, incremental volumes 8 accumulated volumes for overall pond and for forebay, to verify volume provided. KF C—oo 1 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. 7. The supporting calculations. 1 8. A copy of the signed and notarized operation and maintenance (08M) agreement. Q /A 9. A copy of the deed restrictions (if required). IM4 1 P%Wti 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.9.4/18/12 Part III. Required Items Checklist, Page 1 of 1 Permit No. Jw 0 XJ'A 130 0 a (to be provided by DWO) ®�AA STORMWATER MANAGEMENT PERMIT APPLICATION FORM NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 1/1) must be printed, filled out and submitted along with all of the required information. Contact Person Phone Number Date Drainage Area Number Matthew II:':DESIGN'INFORMATION Site Characteristics Drainage area 1,565,484.00 h' Impervious area 1,164,859.00 .nz Percent impervious 74.41 % Design rainfall depth 1.50 in Peak Flow Calculations 1-yr, 24-hr rainfall depth 3.80 in 1-yr, 24-hr intensity -2.50 in/hr Pre -development 1-yr, 24-hrdischarge 3.08 - ff'/sec Post -development l-yr, 24-hrdischarge 0.00 h'/sec Pre/Post 1-yr, 24-hr peak flow control -3.08 h'/sec Storage Volume: Non -SA Waters Minimum design volume required Its Design volume provided h' Storage Volume: SA Waters 1.5" runoff volume 140831.00 ft' Pre -development 1-yr, 24-hr runoff volume 36,225.00 h' Post -development 1-yr, 24-hr runoff volume 359,998.00 ft' Minimum required volume 323773.00 ft' Volume provided 9,768.00 ft' Soils Report Summary Soil type LEON Infiltration rate 12.00 in/hr SHWT elevation 21-.50 fmsl Basin Design Parameters Drawdown time 4.18 days Basin side slopes 5.00 :1 Basin bottom elevation - 23.50 fmsl Storage elevation 25.00 fmsl Storage Surface Area 7,915.00 fe Top elevation 25.00 fmsl Basin Bottom Dimensions Basin length 100.00 ft Basin width 80.00 It Bottom Surface Area 5,148.00 ft' q 1l2pf WATFgOf .+ I I rrn 11f D 15 2013 BY. — Need to provide additional volume NacE: A�ot-�toeSP�l. Jowtit� as PP-�toEb tr,I FbntD�.l OK OK OK Form SW401.mfiltration Basin-Rev.5 11 Ap2011 Parts I. & II. Design Summary, Page 1 of 2 Permit No. (to be provided by DWO) Additional Information Maximum runoff to each inlet to the basin? ac-in 'Length of vegetative filter for overflow 100.00 ft OK Distance to structure >15 It OK Distance from surface waters >50 It OK Distance from water supply well(s) >100 It OK Separation from impervious soil layer >2 It OK Naturally occuring soil above shwl 2.00 It OK Bottom covered with 4-in of clean sand? Y (Y or N) OK Proposed drainage easement provided? N (Y or N) Need a recorded drainage easement Capures all runoff at ultimate build -out? Y '(Y or N) OK Bypass provided for larger storms? Y (Y or N) OK Pretreatment device provided Wet Pond 15 ' . 'r • II y+! Form SW401-Infiltration Basim Bevs 11Ap2011 Parts 1. & 11. Design Summary, Page 2 of 2 Permit (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. Page/ Plan Initials Sheet No. C— 4ao 1. Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out. Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROVE, Overflow device, and Boundaries of drainage easement. joriirliA_ C-47-3P 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing: Bypass structure, Maintenance access, Basin bottom dimensions, Basin cross-section with benchmark for sediment cleanout, Flow distribution detail for inflow, Vegetated filter, and Pretreatment device. PM�4 C— 42-�D 3. Section view of the infiltration basin (1" = 20' or larger) showing: Pretreatment and treatment areas, and Inlet and outlet structures. Vv*k c LC 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. \e�fCCeabqg!> 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. C Clim 1 5. A construction sequence that shows how the infiltration basin will be protected from sediment until the entire drainage area is stabilized. w7o V tR�CWlq*D 7. The supporting calculations. WCt ee 3'> 8. A copy of the signed and notarized operation and maintenance (0&M) agree ent. r� 9. A copy of the deed restrictions (if required). E UVE FEB 15 2013 BY: Form SW401-Infiltration Basin-Rev.4 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1 Permit (to be provided by DWO) /� 020E W ATFq, STORMWATER MANAGEMENT PERMIT APPLICATION FORM o� NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with all of the required information. I::IPRGJECTINFORMATION Project Name P12532D Combat Engineer Battalion OpWaintenance Complex Contact Person Matthew Haley, PE Phone Number 910-383-1044 Date 2111/2013 Drainage Area Number INFILTRATION BASIN 2 I1."'iDESIGN INFORMATION Site Characteristics Drainage area 667,956.00 ffz Impervious area 585,393.00 fe Percent impervious 87.64 Design rainfall depth 1.50 in g� �+�{- y E 0 E Peak Flow Calculations —C 1N/ 1 -yr, 24-hr rainfall depth 3.80 in 1-yr, 24-hr intensity 2.50 in/hr FEB 15 2013 Pre -development 1-yr, 24-hrdischarge 3.94 ft'/sec Post -development 1-yr, 24-hr discharge 0.00 ft'/sec BY' Pre/Post 1-yr, 24-hr peak flow control -3.94 ft'/sec Storage Volume: Non -SA Waters Minimum design volume required It' Design volume provided ft' Storage Volume: SA Waters 1.5" runoff volume 70031.00 it' Pre -development 1-yr, 24-hr runoff volume 15,456.00 it' Post -development 1-yr, 24-hr runoff volume 178814.00 it' Minimum required volume 163358.00 it' Volume provided 7.307.00 ft' Need to provide additional volume B�IOT�' ApD1TTot.1A;A— VOWWE L�S Soils Report Summary Soil type WANDO P�111� \tJ C�OIvI D (r Infiltration rate 8.85 in@r SHWT elevation 19.98 fmsl Basin Design Parameters Drawdown time 4.17 days OK Basin side slopes 5.00 :1 OK Basin bottom elevation 22.00 fmsl OK Storage elevation 23.00 fmsl Storage Surface Area 8,128.00 f? Top elevation 23.00 fmsl Basin Bottom Dimensions Basin length 90.00 it Basin width 70.00 it Bottom Surface Area 6,485.00 it' Form SW401 Infiltration Basin-Rev.5 11Ap2011 Parts 1.811. Design Summary, Page 1 of 2 Permit No. (to be provided by OWO) Additional Information Maximum runoff to each inlet to the basin? ac-in Length of-vegetat(eefilterforoverflow 100.00 it OK Distance to structure >15 ft OK Distance from surface waters >50 it OK Distance from watersupplywell(s) - ->100 it OK Separation from impervious soil layer >2 it OK Naturally occuring soil above shwl 2.00 it OK Bottom covered with 4-in of clean sand? Y (Y or N) OK Proposed drainage easement provided? N (Y or N) Need a recorded drainage easement Capures all runoff at ultimate build -out? Y (Y or N) OK Bypass provided for larger storms? Y (Y or N) OK Pretreatment device provided Wet Pond ECEWC FEB 15 2013 Form SW401 -I nfiltration Basin-Rov.5 11 Ap2011 Pans I. & 11. Design Summary, Page 2 of 2 Permit (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. Pagel Plan Initials Sheet No. F _ C- �® 1. Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. C-4-2-4- 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing: Bypass structure, Maintenance access, Basin bottom dimensions, Basin cross-section with benchmark for sediment cleanout, Flow distribution detail for inflow, Vegetated filter, and Pretreatment device. °[y \ C1 C-- 424- 3. Section view of the infiltration basin (1" = 20' or larger) showing: - Pretreatment and treatment areas, and - Inlet and outlet structures. WtrA CALUS 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. 6. A construction sequence that shows how the infiltration basin will be protected from sediment until the entire drainage area is stabilized. tATIA tyltasad� 7. The supporting calculations. 8. A copy of the signed and notarized operation and maintenance (0&M) � °f � agreent. �pp ® -9. A copy of the deed restrictions (if required). ECEUE fl FEB 15 2013 Form SW401-Infiltration Basin-Rev.4 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1 N"A' NCDF�R 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. Phone number 910-383-1044 Date February 11, 2013 Drainage area number LS-VFS 1 The purpose of the LS-VFS Stormwater enters LS-VFS from Type of VFS 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 1 in/hr 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 from Wet Pond Wooded stormwater setback (slope 4 5%) f? Do not complete this section of the form. ft, 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. min Do not complete this section of the form. in/hr Do not complete this section of the form. cfs Do not complete this section of the form. Pick one: cfs Do not complete this section of the torn. (Y or N) Do not complete this section of the form. Wet detention pond 0.9 cfs — a1sUiACG'F'J -PV f,NT-, 40EA -4 t 70.2 cfs - 14cwnes±3C>A CFS€-rtn. 4;eXLLW0t`-� 2 cfs 391 'cfs— F=Law—Nrmu&%1 p�Fr.o�.-1 WTta�T STRv LtII�E CPtl.cUth'C\o NS 1�=iV1oN�RE'Cf11�c�ro t�toN—�?C1�lV� \FELcx—i f-v/i 1E-f;V-1VE FEB 15 2013 f?v: Form SW401 - LS-VFS - 29June2012 - Rev.10 page 1 of 3 LS-VFS Design Forebay surface area NIA sq ft No forebay is required. Depth of forebay at stormwater entry point 36 in Depth of forebay at stormwater exit point 12 in Depth is appropriate. Feet of level lip needed per cfs 50 fvcfs Computed minimum length of the level lip needed 1955 It TheThe flow for a 100-foot level spreader. Length of level lip provided 100 It Level spreader is too shod to handle the flow. Width of VFS 100 ft Elevation at downslope base of level lip 20.00 fmsl -fmsl I SAT\ot�1S TJ>rMGniSTTLfFi'II�K Elevation at the end of the VFS that is farthest from the LS 17.00 Slope (from level lip to the end of the VFS) 3.00 % Are any draws present in the VFS? N (Y or N) OH Is there a collector swale at the end of the VFS? N (Y or N) Bypass System Design (if applicable) Is a bypass system provided? N (Y or N) Is there an engineered flow splitting device? (Y or N) Dimensions of the channel (see diagram below): M It B It W If y (flow depth for 10-year storm) It freeboard (during the 10-year storm) it Peak velocity in the channel during the 10-yr storm ftlsec Channel lining material Pick one: Does the bypass discharge through a wetland? (Y or N) Does the channel enter the stream at an angle? (Y or N) Explanation of any "Other' responses above w 4 n a j FEB 15 2013 Form SW401 - LS-VFS - 29June2012 - Rev.10 page 2 of 3 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 reVAlt in a r*uest 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 (V - 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 (V = 30' or larger) for the level spreader showing: - Forebay (if applicable), - High flow bypass system, - One foot topic, 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. Initials Page or plan sheet number and any notes: C-q'co —ro C-4Z3 C — CA t N ci 1 tJ' l_LJOt?) FEB 15 2013 By:___� Form SW401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3 ®*A HCDENR 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. �o WAtF, O g I PROJECT,INFORMATION I Project name P1253 2D Combat Engineering Battalion OpslMaintenance Complex Contact name Matthew Haley, PE Phone number 010-383-1044 Date February 11, 2013 Drainage area number IS-VFS 2 The purpose of the LS-VFS Stormwater enters LS-VFS from Type of VFS 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 1 inlhr 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 Wooded stormwaler setback (slope <5%) 112 Do not complete this section of the form. It' 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. min Do not complete this section of the form. Whr Do not complete this section of the form. cfs Do not complete this section of the form. Pick one: cfs Do not complete this section of the form. (Y or N) Do not complete this section of the form. Type of BMP Wet detention pond Peak discharge from the BMP during the design storm 0.45 cis — Dfsct?ASGetD 7c 1%41--, AW, A VF Z Peak discharge from the BMP during the 10-year storm 23.26 cis — Maximum capacity of a 100-toot long LS-VFS 2 cts Peak flow directed to the LS-VFS 23.26 cis — T{,CA,� TµRov<!,q <WER-FLoN orJT ]a' vvpj, vPx Is a flow bypass system going to be used? C N (Y or N) Explanation of any "Other" responses above - CL��wWCC\otilS tJ>•cMOn)SCFt'9'Th ^t �T+ �nl—��� P �oYl D Ci'J FEB 15 2013 BY: Form SW401 - LS-VFS - 29June2012 - Rev.10 �__ page 7 of 3 LS•VFS Design Forebay surface area NIA sq it No forebay is required. Depth of forebay at stormwater entry point 36 in Depth of forebay at stormwater exit point 12 in Depth is appropriate. Feet of level Ip needed per cis 50 fVcfs� Computed minimum length of the level lip needed Length of level lip provided 1163 100 It it The flow is/ s too high for a 100-foot level spreader. Lev of spreader is no, short to handle the flow. Width of VFS 100 it Elevation at downslope base of level lip 22.00 fmsl CAtir`vt�'r•-xonlS �EMe�S1KI)Tlr�j Elevation at the end of the VFS that is farthest from the LS 20.00 fmsl PAN'E�ZcSV V15, V Etoc'T'\ � Slope (from level lip to the end of the VFS) 2.00 % Are any draws present in the VFS? N (Y or N) OK Is there a collector swale at the end of the VFS? N (Y or N) Bypass System Design (if applicable) Is a bypass system provided? N (Y or N) Is there an engineered flow splitting device? (Y or N) Dimensions of the channel (see diagram below): M It B it W it y (flow depth for 10-year storm) it freeboard (during the 10-year storm) it Peak velocity in the channel during the 10-yr storm tVsec Channel lining material Pick one: Does the bypass discharge through a wetland? - (Y or N) Does the channel enter the stream at an angle? (Y or N) Explanation of any 'Other' responses above \V rF OEBilF/EI 1, 15 2013 BY:� Form SW401 - LS-VFS - 29June2012 - Ptev.10 page 2 of 3 IIL 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: Initials Page or plan sheet number and any notes: 1. Plans (V - 50' or larger) of the entire site showing: M1— L_Q-o�-ro-�« -Design at ultimate build -out, - OH -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: IKT-k C 4Z 4- - 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' or larger) showing: V..q c —4Z4- - 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 '�.:1 � C— Gd 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. kA fYl I 1 8. A copy of the signed and notarized operation and maintenance (08M) agreement. 1i I I NC w-_Affl) Form SW401 - LS-VFS - 29June2012 - Rev. 10 page 3 of 3 State Stormwater Management Syystems No. P-1253 2D Combat Engineer Battalion Ops / Maintenance ComplexPermit SW8 1. 30112 W/J Stormwater Permit No. SW8130112 Onslow, County P. I Designer's Certification I, nna,-rNev "A%_ ' , as a duly registered s%OIQA% GN&' in the State of North Carolina, having been authorized to observe eriodic I y/ weekly/ full time) the construction of the project, r -%4L (Project) (Por4o t� for Mcg GAnnP tJE3r=QW'c (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specifications: SEAL Signature ,,,,,,,,,,,,, Registration Number o3r7 8totOf'aN ss� ` Date 3�3ojtm _ Aso `_';r ECEIVE APR 01 2016 BY:_ o___ 0 ,.s n State Stormwater Management Systems' Permit No. SW8 130112 Certification Requirements: (. POk) vF C) ✓ 1. The drainage area to the system contains approximately the permitted acreage. ✓ 2. The drainage area to the system contains no more than the permitted amount of built -upon area. ✓ 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. ✓ 4. All roof drains are located such that the runoff is directed into the system. ✓ 5. The outlet structure elevations are per the approved plan. ✓ 6. The outlet structure is located per the approved plans. 7. Trash rack is provided on the outlet structure. ✓ 8. All slopes above permanent pool are grassed with permanent vegetation. ✓ 9. Vegetated slopes above permanent pool 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; a vegetated filter, level spreader and a secondary BMP. 15. The required system dimensions are provided per the approved plans. N 16. All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDENR-DWQ Regional Office O epeeti9n MCg CokM? u*EUM15 — FUFAAc- 1NOR1K4, �ECEIVE APR 01 2016 BY:_---- o...... n -9 n State Stormwater Management Systems Permit No. SW8 130112 P-1253 2D Combat Engineer Battalion Ops / Maintenance Complex. Stormwater Permit No. SW8 130112 Onslow County Designer's Certification I, fAAT-rN tr1A,,,e`{ , as a duly registered ?(&Fe55tot&L. lef4&, in the State of North Carolina, having been authorized to observe n ica weekly/ full time) the construction of the project, W y / C PoNn VF z.) for Mcm cAmp \reieuNg, (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specifications: iZY. �J,�29�� SEAL p`I`�' l Signature .°'"�t� CAR Registration Number a38to15 ,.�erss;,,•,i:,,=,'. Date 3 (1,o LO = v 1 JECE,IVE pp I APR 0 9 2016 i o--- 0 -X n ti State Stormwater Management Systems' Permit No. SW8 130112 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. ✓ 2. The drainage area to the system contains no more than the permitted amount of built -upon area. All the built -upon area associated with the project is graded such that the runoff drains to the system. ✓ 4. All roof drains are located such that the runoff is directed into the system. ✓ 5. The outlet structure elevations are per the approved plan. ✓ 6. The outlet structure is located per the approved plans. ✓ 7. Trash rack is provided on the outlet structure. ✓ 8. All slopes above permanent pool are grassed with permanent vegetation. ✓ 9. Vegetated slopes above permanent pool 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; a vegetated filter, level spreader and a secondary BMP. ✓ 15. The required system dimensions are provided per the approved plans. Nf 4 16. All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDENR-DWQ Regional Office $ACX& CAJA9 u�. tsE-1'�Suc. V4.3p4j�_ ECEIVE APR 01 2016 BY: 4 State Stormwater Management Systems Permit No. SWB 13t)112 j P-1253 2D Combat Engineer Battalion Ops / Maintenance Complex. 12 J Stormwater Permit No. SW8130112 Onslow County I Designer's Certification I, kv t rgEI S lt;om** ( , as a duly registered rie.. in the State of North Carolina, having been authorized to observe nodica / weekly/ full time) the construction of the project, tom- 12S S 2n GoM6A-r rcNGr 4%e6`2- 6A-mA Uc PJ 09s j h6m &rr-, cnanPUEX (Project) CkNv -#t7 for Mct3 cA6AP t ejeur4l;r (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specifications: �J, SEAL Signature �' A •c A P Registration Number a3tac tS Date 3 1 -4o 11 cm E V E 1 Y APR 0 9 2016 By: State Stormwater Management Systems' . Permit No. SW8 130112 Certification Requirements: ( =NN= V 1� 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. N [! 4. All roof drains are located such that the runoff is directed into the system. N I A 5. The outlet structure elevations are per the approved plan. N h 6. The outlet structure is located per the approved plans. rt I A 7. Trash rack is provided on the outlet structure. ✓ 8. All slopes above permanent pool are grassed with permanent vegetation. ✓ 9. Vegetated slopes above permanent pool 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. NI'A 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; a vegetated filter, level spreader and a secondary BMP. ✓ 15. The required system dimensions are provided per the approved plans. NIA 16. All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDENR-DWQ Regional Office N►cg CAM? te3e NE ECEIVE APR 0 12016 BY: 0--- n -s n State Stormwater Management Systems Permit No. SW8 130112 P-1253 2D Combat Engineer Battalion Ops / Maintenance Complex Stormwater Permit No. SW8 130112 Onslow Countv Gl �I Designer's Certification I, u IAMJE`'2 , as a duly registered � o *a in the State of North Carolina, having been authorized to obsery eriodic t / weekly/ full time) the construction of the project, t;1NaF-1#1-) for Mc Fe rApne t. a )eut445 (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specifications: A MA%mTENAgw—* DQ.ytnr �s Arm is D@,Pw5\L ,,G c,F '�W a S"A W%te"' \T t4gs coMv`t12TVP IFP=rv" AA m=Si-o4 cc,ar�2o%�. am? Ta FtphotL. SNT. SEAL Signature Registration Number QS&o1c�p Date 3(P�&ot4o ECEIVE APR 0 12016 BY: o--- 0 -4 n State Stormwater Management Systems' Permit No. SW8 130112 Certification Requirements: (�►.>�2� 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. K A 4. All roof drains are located such that the runoff is directed into the system. NIA 5. The outlet structure elevations are per the approved plan. Na a 6. The outlet structure is located per the approved plans. _04g7. Trash rack is provided on the outlet structure. ✓ 8. All slopes above permanent pool are grassed with permanent vegetation. ✓ 9. Vegetated slopes above permanent pool 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. NI At 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; a vegetated filter, level spreader and a secondary BMP. 15. The required system dimensions are provided per the approved plans. -K[A�_16. All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDENR-DWQ Regional Office {ruaeetiens Mrj,v cApAQ t, WEZ o4IG — nECEiVE APR 0 12016 BY: 0--- n-sn