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HomeMy WebLinkAboutSW8110326_CURRENT PERMIT_20210525STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 \\WLu DOC TYPE N CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE l0 2� 0 S 2'S YYYYMMDD ROY COOPER Governor DIONNE DELLI-GATT1 secretory BRIAN WRENN Director May 25, 2021 Marine Corps Base Camp Lejeune Attn: Neal Paul, Deputy Public Works Officer 1005 Michael Road Camp Lejeune, NC 28547 NORTH CAROLINA Envhonmenrat Qaattty Subject: Permit Renewal State Stormwater Management Permit No. SW8 110326 Pre -Trial Confinement Facility (P-1310) Ouslow County Dear Mr. Paul: Effective August 1, 2013 the State Stormwater program has been transferred from the Division of Water Quality (DWQ) to the Division of Energy, Mineral and Land Resources (DEMLR). All previous references to DWQ 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 May 17, 2021. The Division is hereby notifying you that permit SW8 110326 has been renewed on May 25, 2021, and shall be effective until May 3, 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 May 3, 2011 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, Cn_� Q YO !4 X .mow Brian Wrenn, Director Division of Energy, Mineral and Land Resources If ®rm Aft'- North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources Wilmington Regional office 1 127 Cardinal Drive Extension I Wilmington. North Carolina 2a405 wmv cwcuuru 910.796.7275 State Stormwater Permit No. SW8 110326 Page 2 of 2 Enclosures: DES/ams: cc: Attachment C — Permitting History Renewal Application Documents \\\Stormwater\Permits & Projects\2011\I 10326 HD\2021 05 permit 110326 William Z. Shipman, PE NCDEQ-DEMLR Wilmington Regional Office Va QJli— 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 rvartv vaouru State Stormwater Management Systems Permit No. SW8 110326 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Marine Corps Base Camp Lejeune Pre -Trial Confinement Facility (P-1310) Duncan St & Sneads Ferry Rd, Camp Lejeune, Onslow County FOR THE construction, operation and maintenance of 2 bioretention basins in compliance with the provisions of Session Law 2008-211 and 15A NCAC 2H .1000 (hereafter jointly and severally referred to as the "stormwater rules") and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR") and considered an enforceable part of this permit. This permit shall be effective from the date of issuance until May 3, 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 1.6 of this permit. The stormwater controls have been designed to handle the runoff from 98,970 and 20,716 square feet of impervious area, respectively. 3. The tract will be limited to the amount of built -upon area as indicated in Section 1.6 of this permit, and per the application documents and the approved plans. The built -upon area for the designated future development areas shown on the plans is limited to zero square feet. 4. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 5. This permit does not allow for the subdivision and sale of any portion of the property, except as noted herein. The subdivision of the property will require a permit modification prior to the subdivision and sale of any lot from this project. Page 1 of 5 State Stormwater Management Systems Permit No. SW8 110326 6. The following design criteria have been met and provided in the bioretention basin and must be maintained at design condition at all times: a. 0 Drainage Area, acres: Onsite, ft2: Offsite, ft2: Total Impervious Surfaces, ft2: Onsite, ft2: Offsite, ft2: Design Storm, inches: Max. Ponded Depth, feet: TSS removal efficiency: Seasonal High Water Table, fmsl: Media Depth, feet: Bottom Elevation, fmsl: Permitted Storage Volume, ft3: Temporary Storage Elevation, fmsl: Surface Area at Sodded Elevation, ft2: Drawdown Time, hours: Type of cell: Media depth, feet: Underdrain Diameter, in: Number of Clean Out Pipes Provided: Receiving Stream/River Basin: Stream Index Number: Classification of Water Body: II. SCHEDULE OF COMPLIANCE 1 2. Basin #1 Basin #2 238,404 51,244 238,404 51,244 0 0 98,970 20,716 98,970 20,716 0 0 1.5 1.5 1.0 1.0 85% 85% 21.0 23.5 2.0 2.0 24.0 26.0 17,020 3,868 27.0 29.0 14,920 3,213 8.59 16.93 Grass Grass 2.0 2.0 2, 4"underdrains 2, 4"underdrains 25 5 UT to Cogdels Creek / White Oak Basin 19-23 "SC; NSW' 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. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. Page 2 of 5 State Stormwater Management Systems Permit No. SW8 110326 3. The permittee shall at all time 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 including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and re -vegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of Division. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. 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. 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. If the stormwater system BMP is used as an Erosion Control device during construction, more frequent maintenance will be required during construction to maintain functionality. Once the drainage area is stabilized and prior to occupancy of the facility, the BMP must be fully restored to design condition. 8. Access to the stormwater facilities shall be maintained via appropriate recorded easements at all times. All stormwater collection and treatment systems must be located in public rights -of -way, dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required rights -of -way, common areas and easements, in accordance with the approved plans. Page 3 of 5 State Stormwater Management Systems Permit No. SW8 110326 10. No person or entity, including the permittee, shall alter any component shown in the approved plans and specifications. Prior to the construction of any modification to the approved plans, the permittee shall submit to the Director, and shall have received approval for modified plans, specifications, and calculations including, but not limited to, those listed below. For changes to the project or SCM that impact the certifications, a new or updated certification(s), as applicable, will be required and a copy must be submitted to the appropriate DEQ regional office upon completion of the modification. a. Any modification to the approved plans and specifications, regardless of size including the SCM(s), BUA, details, etc. b. Redesign or addition to the approved amount of BUA or to the drainage area. C. Further development, subdivision, acquisition, lease or sale of any, all or part of the project and/or property area as reported in the approved plans and specifications. d. Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any component of the approved SCM(s), the stormwater collection system and/or vegetative conveyance shown on the approved plan. e. The construction of any allocated future BUA. f. The construction of any permeable pavement, #57 stone area, public trails, or landscaping material to be considered a permeable surface that were not included in the approved plans and specifications. g. Other modifications as determined by the Director. 11. 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. 12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS 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. 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; Page 4 of 5 State Stormwater Management Systems Permit No. SW8 110326 5. 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 25 day of May 2021. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION CR.pP BnanW re�nn,Uirect r Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Page 5 of 5 Attachment C - Permitting History Pre Trial Confinement Facility P 1310 Permit No. SW8 110326 Approval Date Permit Action BIMS Version Description of the Changes 5/3/201 1 Original Approval 1.0 5/25/2021 Renewal 2.0 DEMLH USF UNLY Date ecei ed Fee Paid Permit Number I . ( I Eteciroroc, ryrnt. p�a NC DEQ Division of Energy, Mineral and Land Resources ECE t V E `` fi STATE STORMWATER: MAY 1 in '" ) PERMIT RENEWAL APPLICATION FORMt 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 110326 2. Project name: Pre -Trail Confinement Facility (P-1310) High Density Commercial Bio-Retention Project 3. Project street address: XXX City: MCB Camp Leieune County: Onslow ZIP: 28542 4. What, if any, changes have been made to the project as permitted? N/A If the project has changed from the original approved plans, please complete SWU-101 fora Major Modification or Minor Modification Application form available at: https:Hdeg.nc.gov/about/divisions/energv- mine ral-land-resou rces/ene rqv-m i neral-land-rules/stormwater-prog ram/post-construction. B. PERMITTEE INFORMATION If changes to the permittee or project name have been made, please complete either the Permit Update form or the Permit Transfer form available at: https://deg.nc.gov/about/divisions/energy-mineral-land- resources/energy-mineral-land- rules/stormwater-program/post-construction. State Stormwater Permits do not automatically transfer with the sale of the property. 1. Current Permit Holder's Company Name/Organization: MCB Camp Leieune 2. Signing Official's Name: Neal Paul 3. Signing Official's Title: Deputy Public Works Division 4. Mailing Address: MCB Camp L,ejeune 1005 Michael Rd. City: MCB Camp Leieune State: NC ZIP: 28547-2521 5. Street Address: City: State: 6. Phone: (910) 451-2213 Email: neal.paul@usmc.mil ZIP : MAY 17 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 HQW/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 I. 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: ® 1 have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to keep this on file with the permit; or ❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a copy be sent to me. I agree to keep this on file with the permit. 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._qov/online services/search/by title/ Business Registration o ate. MAY 17 202, Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018 D. PERMITTEE'S N 1LERT FICATIIOI I, DN�� A. /,.Xw le 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 sub mi proper forms to modify or transfer the permit prior to any changes to the project, SCM r ownership II in rmation provided on this permit renewal application is, to the best of my knowledge, o e and cc plete. Signature: / Date: 21 L) NOTARIZATION: 1, I UV5an a Notary Public for the State of N,YA�t ,County of Cnt2lzi / ,dohereby certify that J2s jLA LbvsdLr personally appeared before me this the T day of ry) 1 20�, and acknowledge the due execution of the forgoing instrument. Witness my hand and official seal, (Notary Seal) \V ERSO�' (V,'NOTARY , Notary Signature: c , ' PUBL_; My commission expires t� JT �� %� '%�l�S� •. ��� ',/,low COJ� �. Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 Permit Number: (to be provided by DWQ) Drainage Area Number: I Bioretention 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 operation and maintenance procedures: — Immediately after the bioretention cell is established, the plants will be watered twice weekly if needed until the plants become established (commonly six weeks). — Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell. — Heavy equipment will NEVER be driven over the bioretention cell. — Special care will be taken to prevent sediment from entering the bioretention cell. — Once a year, a soil test of the soil media will be conducted. After the bioretention cell is established, I will inspect it 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 will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblems: How 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 bioretention cell 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, The pipe is clogged (if Unclog the pipe. Dispose of the stone verge or swale applicable). 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. D Stone verge is clogged or Remove sediment and clogged IVLi Cri' covered in sediment (if stone and replace with clean stone. \\ applicable . MAR 2011 B 1' Form S W401-Bioretention O&M-Rev.3 Page 1 of 4 BMP element: Potentialproblems: How 1 will remediate theproblem: The pretreatment area Flow is bypassing Regrade if necessary to route all pretreatment area and/or flow to the pretreatment area. gullies have formed. Restabilize the area after grading. Sediment has accumulated to Search for the source of the a depth greater than three sediment and remedy the problem if inches. possible. Remove the sediment and restabilize the pretreatment area. 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. The bioretention cell: Best professional practices Prune according to best professional vegetation 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. Tree stakes/wires are present Remove tree stake/wires (which six months after planting. can kill the tree if not removed). The bioretention cell: Mulch is breaking down or Spot mulch if there are only random soils and mulch has floated away. void areas. Replace whole mulch layer if necessary. Remove the remaining much and replace with triple shredded hard wood mulch at a maximum depth of three inches. Soils and/or mulch are Determine the extent of the clogging clogged with sediment. - remove and replace either just the top layers or the entire media as needed. Dispose of the spoil in an appropriate off -site location. Use triple shredded hard wood mulch at a maximum depth of three inches. Search for the source of the sediment and remedy the problem if ossible. An annual soil test shows that Dolomitic lime shall be applied as pH has dropped or heavy recommended per the soil test and metals have accumulated in toxic soils shall be removed, the soil media. disposed of properly and replaced with new planting media. 4 Form SW401-Bioretention O&M-Rev3 Page 2 of 4 BMP element: Potentialproblems: How I will remediate theproblem: The underdrain system Clogging has occurred. Wash out the underdrain system. if applicable) The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of the sediment off -site. The drop inlet is damaged Repair or replace the drop inlet. 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.i Form SW401-Bioretention O&M-Rev.3 Page 3 of 4 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:Pre-Trial Confinement Facility (P-1310) BMP drainage area Print name: Carl Pq�e✓ Title: WbeCeil Address: 1005' 0;c.letacl F—A.I GnvwD Lej<0. 0- 1-kC 286-q Date: —( 1 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. *iI, � ( i OL— No r r s a Notary Public for the State of IVO(rl' C0-�(-0 1 �1(L, County of Q r) -3(,ov i do hereby certify that iiN �t oL I Y)CAQ'(— personally appeared before me this J l— day ofa- 01( , and acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my hand and official seal, SYLVIA NORRIS NOTARY PUBLIC ONSLOW COUNTY, MY COMMISSION EXPIRES t 3 ca SEAL My commission expires Form SW401-Bioretention I&M-Rev. 2 Page 4 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: 7— Bioretention 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 operation and maintenance procedures: — Immediately after the bioretention cell is established, the plants will be watered twice weekly if needed until the plants become established (commonly six weeks). — Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell. — Heavy equipment will NEVER be driven over the bioretention cell. — Special care will betaken to prevent sediment from entering the bioretention cell. — Once a year, a soil test of the soil media will be conducted. After the bioretention cell is established, I will inspect it 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 will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblems: How 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 bioretention cell 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, The pipe is clogged (if Unclog the pipe. Dispose of the stone verge or swale applicable). 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. Stone verge is clogged or Remove sediment and clogged covered in sedime f stone and replace with clean stone. a licab �— MAR 2 4 PZ F:C;ETVED � MAR 0 4 2011 gY� Form SW401-Bioretention O&M-Rev.3 Ire Y Page 1 of 4 BMP element: Potentialproblems: How 1 will remediate theproblem: The pretreatment area Flow is bypassing Regrade if necessary to route all pretreatment area and/or flow to the pretreatment area. gullies have formed. Restabilize the area after grading. Sediment has accumulated to Search for the source of the a depth greater than three sediment and remedy the problem if inches. possible. Remove the sediment and restabilize the pretreatment area. 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. The bioretention cell: Best professional practices Prune according to best professional vegetation 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. Tree stakes/wires are present Remove tree stake/wires (which six months after planting. can kill the tree if not removed). The bioretention cell: Mulch is breaking down or Spot mulch if there are only random soils and mulch has Floated away. void areas. Replace whole mulch layer if necessary. Remove the remaining much and replace with triple shredded hard wood mulch at a maximum depth of three inches. Soils and/or mulch are Determine the extent of the clogging clogged with sediment. - remove and replace either just the top layers or the entire media as needed. Dispose of the spoil in an appropriate off -site location. Use triple shredded hard wood mulch at a maximum depth of three inches. Search for the source of the sediment and remedy the problem if possible. An annual soil test shows that Dolomitic lime shall be applied as pH has dropped or heavy recommended per the soil test and metals have accumulated in toxic soils shall be removed, the soil media. disposed of properly and replaced with new planting media. Form SW401-Bioretention O&M-Rev.3 Page 2 of 4 BMP element: Potentialproblems: How I will remediate theproblem: The underdrain system Clogging has occurred. Wash out the underdrain system. if applicable) The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of the sediment off -site. The drop inlet is damaged Re air or replace the drop inlet. 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. t, 11V�_dt:•i � 4 2011 Form SW401-Bioretention O&M-Rev.3 Page 3 of 4 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:Pre-Trial Confinement Facility (P-1310) BMP drainage area number:$ y Print name: Ca+r l &+ Date: '-� —I ?,—I f 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,,SVI VV I G. 1 o (f 15 a Notary Public for the State of KO(-tCCa �. nnO\ (' V) . County of n h SI O W , do hereby certify that U 0-0.0 1� U(1\l�e (^ personally appeared before me this day of'� eand acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my hand and official seal, SYLVIA NORRIS NOTARY PUBLIC ONSLOW COUNTY, MY COMMISSION EXPIRES SEAL My commission expires M,.L J' -( 4ZO/s Form SW401-Bioretention 1&M-Rev. 2 Page 4 of 4 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 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 The pipe is clogged (if Unclog the pipe. Dispose of the swale applicable). 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. � �.�1~:�:l���vl✓� I MAR 0 4 2011 Form SW401-Infiltration Basin O&M-Rev.3 � l` X. ___ P ige 1 of 3 i : . BMP element: Potentialproblem: How I will remediate theproblem: The forebay Sediment has accumulated Search for the source of the and reduced the depth to 75% 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 spraying. The main treatment area A visible layer of sediment Search for the source of the has accumulated. 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 repair. 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. Form SW401-infiltration Basin O&M-Rev.3 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:Pre-Trial Confinement Facility (P-1310) BMP drainage area number: Print name: C t Address: {� Ids 10015— H,, haf I K el; COM42 Le j,011P 1,1 C.- 2,851 Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. 1, &J1 V (Cx- tt) i f'f S 1 , a Notary Public for the State of �r((�y#1 CWnA 1 ntu , County of U n 40 w do hereby certify that l�Glf 1 I�UK2 C' personally appeared before me this day of 'fN ,9_0(1 > and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, SYLVIA NORRIS NOTARY PUBLIC ONSLOW COUNTY, MY COMMISSION EXPIRES ' SEAL My commission expires <.2 0L15 MAR 0 4 2011 Form SW40 I -Infiltration Basin O&M-Rev.3 Page 3 of 3 Permit No. (to be nmvided by DWQ) N" �ws o� FwnfphO` kTXA > � 9 STORMWATER MANAGEMENT PERMIT APPLICATION FORM ION MCDENR 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 Zak Shipman, PE Phone Number (919) 8664937 Date 1/1412011 Drainage Area Number 1 Site Characteristics Drainage area 60,315.00 f" Impervious area 37,486.00 ft2 Percent impervious 0.62 % Design rainfall depth 1,00 in Peak Flow Calculations 1-yr, 24-hr rainfall depth 3,70 in 1-yr, 24-hr intensity in/hr Pre -development 1-yr, 24-hr discharge 0.00 ft'Isec Post -development 1-yr, 24-hr discharge 0.00 ft'Isec Pre/Post 1-yr, 24-hr peak Flow control 0.00 ft'Isec Storage Volume: Non -SA Waters ,Animum design volume required 3,050.00 ft' Design volume provided 15,131.00 ft' OrC no.) -EA ware,z Storage Volume: SA Waters 1.5' runoff volume h' Pre -development 1-yr, 24-hr runoff volume ft' Post -development 1-yr, 24-hr runoff volume ft' Minimum required volume ft' Volume provided ff Soils Report Summary Sail type Sand (SM) Infiltration rate 1.25 in/hr SHWT elevation 24.80 final Basin Design Parameters Drawdown time 0.25 days Ok Basin side slopes 3.00 :1 Or Basin bottom elevation 27.00 fmsl GY Storage elevation 29.00 fmsl Storage Surface Area 9,159.00 it fmsl +,'V�i� Top elevation 29.50 Basin Bottom Dimensions 7.MAR 0 4 2011Basin Basin length 230.00 ft width 26.00 it Bottom Surface Area 6,029.00 ft2Y -- Form SW401-Infiltration Basin-Rev.4 Parts I. & it. Design Summary, Page 1 or 2 Permit No. (to be provided by DWO) Additional Information Maximum runoff to each inlet to the basin? NIA ac-in Length of vegetative filter for overflow N/A fit Distance to structure N/A it Distance from surface waters 250.00 ft Distance from water supply well(s) N/A ft Separation from impervious soil layer N/A ft Naturally occuring soil above shwt 1.87 It Bottom covered with 4-in of clean sand? Y (Y or N) Proposed drainage easement provided? N/A (Y or N) Capures all runoff at ultimate build -out? Y (Y or N) Bypass provided for larger storms? N/A (Y or N) Pretreatment device provided N/A Maximum of 2 acre.inches allowed OK OK OK OK OK OK OK OK OK OK Form SW401-Infiltration Basin-Rev.4 Parts I. & II. Design Summary, Page 2 of 2 Permit Number: (to be provided by DWQ) OF NAr� O;� O bLua, p NC=- < STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM BIORETENTION CELL 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. Project name Contact name Phone number Date Drainage area number Site Characteristic: Drainage area Impervious area Percent impervious Design rainfall depth Peak Flow Calculations Is pre/post control of the 1-yr, 24-hr peak flow required? 1-yr, 24-hr runoff depth 1-yi, 24-hi intensity Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yi, 24-hr peak control Storage Volume: Non•SA Waters Minimum volume required Volume provided StorageVolume: 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 Cell Dimensions Fording depth of water Funding depth of water Surface area of the top of the bioretention cell length: Width: -or- Radius Media and Soils Summary Drawdown time, ponded volume Drawdown time, to 24 inches below surface Drawdown time, total: In -situ soil: Soil permeability Planting media soil.. Soil permeability Soil composition • Sand (by volume) % Fines (by volume) • Organic (by volume) Phosphorus Index (P-Index) of media Form SW401-eiorelention-Rev.e June 25, 2010 Pre -Trial PE 193,326 ft2 61,282 ft2 31.7% % 1.0 inch Y (Y or N) 3.7 in in/hi 0.000 ft'tsec 0.000 h'/sec 0.000 ff'/sec 5,400.0 fl' 17,020.0It' OK 0 ft' 0 ft' o It' 0 ff 0 ff' OK 12 inches OK 1.00 ft 24,223.0 ft2 OK it it It 4,52 hr OK 8.59 hr OK 13.11 hr 0.32 in/hr Insufficient Increase infiltration rate or include undo �F4';�r�YV1C 2.00 in/hr OK 85% OK MAR 0 4 2011 12% OK 3% OK '---- - -- Total: 100% 20 (unitless) OK Parts 1 and 0. Design Summary, Page 1 of 2 Permit Number. r '\ b (to be provided by D WQ) Basin Elevations Temporary pool elevation Type of bioretention cell (answer 'Y' to only one of the two following questions); Is this a grassed cell? Is this a cell with trees/shrubs? Planting elevation (top of the mulch or grass sod layer) Depth of mulch Bottom of the planting media soil Planting media depth Depth of washed sand below planting media soil Are underdrains being installed? How many clean out pipes are being installed? What factor of safety is used for sizing the underdrains? (See BMP Manual Section 12.3.6) Additional distance between the bottom of the planting media and the bottom of the cell to account for underdrains Bottom of the cell required SHWT elevation Distance from bottom to SHWT Internal Water Storage Zone (IWS) Does the design include IWS Elevation of the top of the upturned elbow Separation of IWS and Surface Planting Plan Number of tree species Number of shrub species Number of herbaceous groundcover species Additional Information Does volume in excess of the design volume bypass the bioretention cell? Does volume in excess of the design volume flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? is the BMP located at least 30 feel from surface waters (50 feet if SA waters)? Is the BMP located at least 100 feet from water supply wells? Are the vegetated side slopes equal to or less than 3.1? Is the BMP located in a proposed drainage easement with access to a public Right of Way (ROW)? Inlet velocity (from treatment system) 27.00 fmsl Y (Y or N) OK N (Y or N) 26 fmsl 2 inches OK 24 fmsl 2h 0.33 it � m►ll 25 OK 10 OK lit 22.67 fmsl 20 fmsl 2.67 it OK N (Y or N) fmsl 26 it 0 0 0 Recommend more species. N (Y or N) Excess volume must bypass cell. N/A (Y or N) Enter Dale it N (Y or N) Show how Flow is evenly distributed. Y (Y or N) OK N/A (Y or N) Enter Data y (Y or N) OK N/A (Y or N) Insufficient ROW location. 11/sec Is the area surrounding the cell likely to undergo development in N (Y or N) OK the future? Are the slopes draining to the bioretention cell greater than 20%? N (Y or N) OK Is the drainage area permanently stabilized? Y (Y or N) OK Pretreatment Used (Indicate Type Used with an "X" in the shaded cell) Gravel and grass (8 inches gravel followed by 3-5 It of grass) Grassed swale Forebay Other X OK Form SW401-Bioretention-Rev.8 June 25. 2010 Parts 1 and If. Design Summary, Page 2 of 2 .i r , Pertnn No: (to be assigned by DWQ) Ill. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional Information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. L' • o 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), Cell dimensions, Pretreatment system, - High flow bypass system, - Maintenance access, -Recorded drainage easement and public right of way (ROW), - Clean out pipe locations, Overflow device, and - Boundaries of drainage easement. 2, Plan details (1" = 30' or larger) for the bioretention cell showing: Cell dimensions Pretreatment system, - High flow bypass system, Maintenance access, - Recorded drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. Indicate the P-Index between 10 and 30 3, Section view of the bioretention cell (1" = 20' or larger) showing: - Side slopes, 3:1 or lower - Underdrain system (if applicable), and - Biorelention cell layers (ground level and slope, pre-treatment, pending depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone d applicable), #57 stone, underdrains (if applicable), SHWT level(s), and overflow structure) /! 4. A sails 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. All elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in situ soil must include: - Soil permeability, - Soil composition I% sand, % fines. % organic), and P-index. 5. A detailed planting plan (I' = 20' or larger) prepared by a qualified individual showing: - A variety of suitable species, - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, A planting detail, The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. 6. A construction sequence that shows how the hioretention cell will be protected from sediment until the ` entire drainage area is stabilized. r a,, :.- _ 7. The supporting calculations (including underdrain calculations, if applicable). 8. A copy of the signed and notarized inspection and maintenance (1&M) agreement. t1.2 •'.. 9. A copy of the deed restriction. Forrn SW 401-Sioretenfion-Rev.7 Part III, Page 1 of 1, Permil ®MA NCDENR Ito be provided by D WQ) �F INA rt STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM BIORETENTION CELL SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Pad Ill) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION Project name Pre -Trial Confinement Facility (P-1310) Contact name Zak Shipman, PE Phone number (919) 86GA937 Date January 14, 2011 Drainage area number 3 II. DESIGN INFORMATION Drainage area Impervious area Percent impervious Design rainfall depth Peak Flow Calculations Is pre/post control of the 1-yr, 24-hr peak flow required? 1-yr, 24-hr runoff depth 1-yr, 24-hr intensity Pre -development 1-yr, 24hr peal; Flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr. 24-hr peak control Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5° runoff volume Pre -development 1-yr, 24hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Cell Dimensions Forcing depth of water Ponding depth of water Surface area of the top of the bioretention cell Length: Width: -or- Radius Media and Soils Summary Drawdown time, ponded volume Drawdown time, to 24 inches below surface Drawdown time, total: In -situ soil: Soil permeability Planling media soil: Soil permeability Soil composition • Sand (by volume) % Fines (by volume) • Organic (by volume) Phosphorus Index (P-Index) of media Form S W 401-eioretention-Rev.8 June 25. 2010 51,244 ft' 20,672 Rr 40.3% % 1.0 inch Y (Y or N) 3.7 in in/hr 0.000 ft'/sec 0.000 ft'/sec 0.000 ft'/sec 1,765.0 ft' 3,819.0 ft' OK 0 ff' 0 ft' 0 ft' o ft' o fl' OK 12 inches OK 1.00 it 4,460.0 ft1 OK It it I 8.06 hr OK 15.32 hr OK 23.38 hr 0.10 in/hr Insufficient. Increase infiltration rate or include underdrains, i ` _�'.� �% 2.00 in/hr OK �. • - r�' 85% OK MAR 0 4 2011 12% OK 3% OK Total: 100% �—'-- 20 (unitless) OK Parts I and II. Design Summary, Page 1 of 2 Permit Number. 1'1% > (to be provided by DWQ) Basin Elevations Temporary pool elevation Type of bioretention cell (answer "Y' to only one of the two following questions): Is this a grassed cell? Is this a cell with trees/shrubs? Planting elevation (top of the mulch or grass sod layer) Depth of mulch Bottom of the planting media soil Planting media depth Depth of washed sand below planting media soil Are underdrains being installed? How many clean out pipes are being installed? What factor of safety is used for sizing the underdrains? (See BMP Manual Section 12.3.6) Additional distance between the bottom of the planting media and the bottom of the cell to account for underdrains Bottom of the cell required SHWT elevation Distance from bottom to SHWT Internal Water Storage Zone (IWS) Does the design include IWS Elevation of the lop of the upturned elbow Separation of IWS and Surface Planting Plan Number of tree species Number of shrub species Number of herbaceous groundcover species Additional Information Does volume in excess of the design volume bypass the bioretention cell? Does volume in excess of the design volume Flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute Flow? Is the BMP located at least 30 feet from surface waters (50 feet if SA waters)? Is the BMP located at least 100 feel from water supply wells? Are the vegetated side slopes equal to or less than 3:1? Is the BMP located in a proposed drainage easement with access to a public Right of Way (ROW)? Inlet velocity (from treatment system) Is the area surrounding the cell likely to undergo development in the future? Are the slopes draining to the bioretention cell greater than 20%? Is the drainage area permanently stabilized? Pretreatment Used (Indicate Type Used with an "X" in the shaded cell) Gravel and grass (8 inches gravel followed by 3-5 it of grass) Grassed swale Forebay Other 29.00 fmsl Y (Y or N) N (Y or N) 28 fmsl 2 inches 26 fmsl 24 0.33 ft OK OK Y (Y or N) 5 OK 10 OK 1 It 24.67 fmsl 22.5 fmsl 2.17 it OK N (Y or N) Intel 28 ft 0 0 0 Recommend more species. N (Y or N) Excess volume must bypass cell. N/A (Y or N) Enter Dal@ fl N (Y or N) Show how now is evenly distributed, Y (Y or N) OK N/A (Y or N) Enter Data Y (Yor N) OK N/A (Y or N) Insufficient ROW location. ft/sec N (Y or N) OK N (YorN) OK Y (Y or N) OK X OK Form SW401-Bioretention-Rev.8 June 25, 2010 Parts I and 11. Design Summary, Page 2 of 2 Peril No: (to be assigned by D WQ) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An Incomplete submittal package will result in a request for additional Information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met, If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. 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), - Cell dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. 2. Plan details (1' = 30' or larger) for the bioretention cell showing: Cell dimensions - Pretreatment system, - High Flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. - Indicate the P-Index between 10 and 30 7 3. Section view of the biorelention cell (1" = 20' of larger) showing. - Side slopes, 3:1 or lower - Underdrain system (if applicable), and - Bioretention cell layers (ground level and slope, pre-treatment, pone ing depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable), SHWT level(s), and overflow structure] 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The - results of the soils report must be verified in the field by DWO, by completing &submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (rmst). Results of soils tests of both the planting soil and the in situ soil must include: - Soil permeability, - Soil composition (% sand, % fines, %, organic), and P-index. 5, A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: - A variety of suitable species, - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, , - A planting detail, - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. 6. A construction sequence that shows how the bioretenlion cell will be protected from sediment until the ' entire drainage area is stabilized. , -:0_11 7. The supporting calculations (including underdrain calculations, if applicable). n B. A copy of the signed and notarized inspection and maintenance (I&M) agreement. 9. A copy of the deed restriction. Form SW401-Bioretention-Rev.7 Part III, Page 1 or 1 - Permit Number: (to be provided by DWO) ��� 02 4 WATfgoL y NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM BIORETENTION CELL 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. rrolecl name rue-i nal uomm Contact name Zak Shipman, F Phone number ( 119) 866A937 Date April 18, 2011 Drainage area number 1 II. DESIGN INFORMATION Site Characteristics Drainage area 238,404 ft' Impervious area 98,970 ftz Percent impervious 41.5% % Design rainfall depth 1.5 inch Peak Flow Calculations Is pre/post control of the 1-yr, 24-hr peak flow required? 1-yr, 24-hr runoff depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak Flow Pre/Post 1-yr, 24-hr peak control Storage Volume: Non-SAWaters 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 Cell Dimensions Ponding depth of water Ponding depth of water Surface area of the top of the bioretention cell Length: Width: -or- Radius Media and Soils Summary Drawdown time, ponded volume Drawdown time, to 24 inches below surface Drawdown time, total: In -situ soil: Soil permeability Planting media soil: Soil permeability Soil composition • Sand (by volume) • Fines (by volume) % Organic (by volume) Phosphorus Index (P-Index) of media Form SW401-Biorelenlion-Rev.8 June 25, 2010 N (Y or N) 3.7 in in/hr 0.000 ft'/sec 0.000 ft'/sec 0.000 ft'/sec 12,616.0 ft' 17,020.0 ft' 0 ft' 0 ft' 0 ft' 0 ft' 0 ft' 12 inches 1.00 ft 14,920.0 ftZ ft ft ft 4.52 hr 8.59 fir 13.11 fir 0.32 m/hr 2.00 in/hr OK OK OK OK OK )"1I9,, eor IS 5WLFh c-/{"kT pv,,_mjt ; c4E1s7jokt. Insufficient. Increase infiltration rate or include underdrains. OK 85% OK 12% OK 3% OK Total: 100% 20 (unitless) OK APR 2 1 2011 Parts I and II. Design Summary, Page 1 of 2 Basin Elevations Temporary pool elevation Type of bioretention cell (answer 'Y" to only one of the two following questions): Is this a grassed cell? Is this a cell with trees/shrubs? Planting elevation (top of the mulch or grass sod layer) Depth of mulch Bottom of the planting media soil Planting media depth Depth of washed sand below planting media soil Are underdrains being installed? How many clean out pipes are being installed? What factor of safely is used for sizing the underdrains? (See BMP Manual Section 12.3.6) Additional distance between the bottom of the planting media and the bottom of the cell to account for underdrains Bottom of the cell required SHWT elevation Distance from bottom to SHWT Internal Water Storage Zone (IWS) Does the design include IWS Elevation of the lop of the upturned elbow Separation of IWS and Surface Planting Plan Number of tree species Number of shrub species Number of herbaceous groundcover species Additional Information Does volume in excess of the design volume bypass the bioretention cell? Does volume in excess of the design volume Now evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? Is the BMP located at least 30 feet from surface waters (50 feet if SA waters)? Is the BMP located at least 100 feet from water supply wells? Are the vegetated side slopes equal to or less than 3:1? Is the BMP located in a proposed drainage easement with access to a public Right of Way (ROW)? Inlet velocity (from treatment system) Is the area surrounding the cell likely to undergo development in the future? Are the slopes draining to the bioretention cell greater than 20%? Is the drainage area permanently stabilized? Pretreatment Used (Indicate Type Used with an'X" in the shaded cell) Gravel and grass (8inches gravel followed by 3-5 It of grass) Grassed Swale Forebay Other Permit Number: (to be provided by E WQJ 21.00 IS-Nc Et ralpmua AT -Tpr� TT I VLI COL. Jcvr. Na-- 27.00 fmsl ^1'E� 6-.-a_-TY 10u me To CL. Y (Y or N) OK N (Y or N) 26 fmsl 0 inches Insufficient mulch depth, unless installing grassed cell. 24 fmsl 2 It 0.33 ft Y (Y or N) 25 OK 10 OK 1 It ACLAX 4.-rtp,-r,. = Et_. V+ 7 zl To SH`ar 22.67 fmsl 21 fmsl 1.67ft Insufficient distance to SHWT. N (YorN) fmsl 26 ft 0 0 0 Recommend more species. N (Y or N) Excess volume must bypass cell. N (Y or N) Excess volume must pass through filter. It N (Y or N) Show how flow is evenly distributed. Y (Y or N) OK Y (Y or N) OK Y (Y or N) OK N (Y or N) Insufficient ROW location. ft/sec N (Y or N) OK N (Y or N) OK Y (Y or N) OK X OK APR 21 2011 Form SW401-Bioretenlion-Rev.8 June 25, 2010 Parts I and It. Design Summary, Page 2 of 2 Permit No: (to be assigned by DWO) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. c.— 16 5 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), - Cell dimensions, - Pretreatment system, - High Flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. �` C—ea-1 2. Plan details If" = 30' or larger) for the bioretention cell showing: - Cell dimensions - Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Design at ultimate build -out, Off -site drainage (if applicable), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. - Indicate the P-Index between 10 and 30 3. Section view of the bioretenlion cell (1' = 20' or larger) showing: - Side slopes, 3:1 or lower - Underdrain system (if applicable), and - Bioretention cell layers [ground level and slope, pre-treatment, pending depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable), SHWT level(s), and overflow structure) A 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in situ soil must include: - Soil permeability, L _ 100 - Soil composition (% sand, % fines, % organic), and -index. � d 5. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: - A variety of suitable species, 7PA�e - Sizes, spacing and locations of plantings,- Total quantity of each type of plant specified,�f-Aplantingdetail, R 21 2011 - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. B 6. A construction sequence that shows how the bioretention cell will be protected from sediment until' v_ entire drainage area is stabilized. l7 7. The supporting calculations (including underdrain calculations, if applicable). LL— 8. A copy of the signed and notarized inspection and maintenance (AM) agreement. T _4N_ 9. A copy of the deed restriction. Fonn SW401-13ioretendon-Rev.7 Part III, Page 1 of 1 Permit (to be provided by D WQ) m2OF WATPgOr NCDENR C STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM BIORETENTION CELL SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION Project name Pre -Trial Confinement Facility (P-1310) Contact name Zak Shipman, PE Phone number (919) 8664937 Date April 19, 2011 Drainage area number 2 II.: DESIGN INFORMATION Site Characteristics Drainage area 51,244 ft' Impervious area 20,716 ft2 Percent impervious 40.4% % Design rainfall depth 1.5 inch Peak Flow Calculations Is pre/post control of the 1-yr, 24-hr peak flow required? N (Y or N) 1-yr, 24-hr runoff depth 3.7 in 1-yr, 24-hr intensity in/hr Pre -development 1-yr, 24-hr peak flow 0.000 ft'/sec Post -development 1-yr, 24-hr peak flow 0.000 ft'/sec Pre/Post 1-yr, 24-hr peak control 0.000 ft'/sec Storage Volume: Non -SA Waters Minimum volume required 2,649.0 ft' Volume provided 3,868.0 It' OK 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 Cell Dimensions Ponding depth of water Forcing depth of water Surface area of the top of the bioretention cell Length: Width: -or- Radius Media and Soils Summary Drawdown time, ponded volume Drawdown time, to 24 inches below surface Drawdown time, total: In -situ soil.. Soil permeability Planting media soil: Soil permeability Soil composition • Sand (by volume) • Fines (by volume) • Organic (by volume) oW 0W 0 fh 0 ftr 0 W OK 12 inches OK 10f1 g^13Sr IS S,,aA CC- At CA " RgNTINC� 3,213.00 ,213.3.0 ftZ OK t ffYATIou ft ft 9.67 hr OK 16.93 hr OK 26.6 hr 0.10 in/hr Insufficient. Increase infiltration rate or include underdrains. 2.00 in/hr OK 85% OK 12% OK 3% OK Total: 100% APR 2 1 2011 Phosphorus Index (P-Index) of media Form SW401-Bioretention-Rev.8 June 25, 2010 20 (unitless) OK Parts I and II. Design Summary, Page 1 of 2 J Basin Elevations Temporary pool elevation Type of bioretention cell (answer "Y' to only one of the two following questions): Is this a grassed cell? Is this a cell with trees/shrubs? Planting elevation (top of the mulch or grass sod layer) Depth of mulch Bottom of the planting media soil Planting media depth Depth of washed sand below planting media soil Permit Number: (m be provided by DWD) G`f•o0 IS EtLJwT oa OF-r.F fASeE.S74c,tTMt ' 29.00 fmsl WC-MO1-YdbT62 DU--TY ySL,, < ST7�ES Tp lii�l-, 'LB. ba Y (Y or N) N (Y or N) 28 fmsl 0 inches 26 fmsl 2 it n11rf Are underdrains being installed? Y (Y or N) How many clean out pipes are being installed? 5 What factor of safety is used for sizing the underdrains? (See 10 BMP Manual Section 12.3.6) Additional distance between the bottom of the planting media and 1 ft the bottom of the cell to account for underdrains Bottom of the cell required 24.67 fmsl SHWT elevation 23.5 first Distance from bottom to SHWT 1.17 It Internal Water Storage Zone (IWS) Does the design include IWS N (Y or N) Elevation of the top of the upturned elbow fmsl Separation of IWS and Surface 28 ft Planting Plan Number of tree species 0 Number of shrub species 0 Number of herbaceous groundcover species 0 Additional Information Does volume in excess of the design volume bypass the N (Y or N) bioretention cell? Does volume in excess of the design volume flow evenly distributed N (Y or N) through a vegetated filter? What is the length of the vegetated filter? It Does the design use a level spreader to evenly distribute flow? N (Y or N) Is the BMP located at least 30 feet from surface waters (50 feel if Y (Y or N) SA waters)? Is the BMP located at least 100 feet from water supply wells? Y (Y or N) Are the vegetated side slopes equal to or less than 3:1? Y (Y or N) Is the BMP located in a proposed drainage easement with access N (Y or N) to a public Right of Way (ROW)? Inlet velocity (from treatment system) ft/sec Is the area surrounding the cell likely to undergo development in N (Y or N) the future? Are the slopes draining to the bioretenlion cell greater than 20%? N (Y or N) Is the drainage area permanently stabilized? Y (Y or N) Pretreatment Used (Indicate Type Used with an "X" in the shaded cell) Gravel and grass (81inches gravel followed by 3-5 It of grass) Grassed Swale X Forebay Other OK Insufficient mulch depth, unless installing grassed cell. OK Na 6.+ .� 6T MG-b14 = e-2- � 21 -r,,> SI�b.JT� Insufficient distance to SHWT. Recommend more species. Excess volume must bypass cell. Excess volume must pass through filter Show how Flow is evenly distributed OK OK, OK Insufficient ROW location. OK OK OK OK APR 21 2011 Form SW401-Bioretention-Rev.8 June 25, 2010 Parts I and IL Design Summary, Page 2 of 2 Permit No: (to be assigned by DWO) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. 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), - Cell dimensions, - Pretreatment system, - High Flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. C-_J5"g 2. Plan details (1' = 30' or larger) for the bioretention cell showing: - Cell dimensions - Pretreatment system, - High Flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Design at ultimate build -out, -Off-site drainage (if applicable), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. c-0 - Indicate the P-Index between 10 and 30 3. Section view of the bioretention cell (1' = 20' or larger) showing: - Side slopes, 3:1 or lower - Underdrain system (if applicable), and - Bioretention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable), SHWT level(s), and overflow structure) 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. All elevations shall be in feel mean sea level (fmsl). Results of soils tests of both the planting soil and the in situ soil must include: - Soil permeability, - Soil composition (% sand, % fines, % organic), and L"1O" -P-index. 5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing: - A variety of suitable species, - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, - A planting detail, - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. QaL 'i 6. A construction sequence that shows how the bioretention cell will be protected from sediment until the entire drainage area is stabilized. 7. The if R.F��. �i' IVED ^~� � supporting calculations (including underdrain calculations, applicable). 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement. APR 21 Nil 9. A copy of the deed restriction Form SW401-Bioretention-Rev.7 Part III, Page 1 of 1 State Stormwater Management Systems Permit No. SW8 110326 Pre -Trial Confinement Facility (P-1310) Stormwater Permit No. SW8 110326 Onslow Countv Designer's Certification I, as a duly registered 1714ch in the State of North Carolina, having been authorized to observe penodicall weekly/ full time) the construction of the project, (Project Name) for Mno . <C � CA. tkl6wdt- (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature (/VA/v(�•��- Registration Number _)1r>os:? Date IIII`1I?, - Page 7 of 8 ,�i H I CgRO OFESS/p��y�� 4� SEAL GINOy:9 Q - Z 8N�0P?\\\` RAY State Stormwater Management Systems Permit No. SW8 110326 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted �� amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. �,Y 4. All roof drains are located such that the runoff is directed into the system. iljf%if>`, 5. The outlet/bypass structure elevations are per the approved plan. 4)6. The outlet structure is located per the approved plans. _*7. Trash rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation, per the vegetation plan. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short- circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. � 12. Required drawdown devices are correctly sized and located per the approved plans. I-A<113. All required design depths are provided. 14. All required parts of the system are provided, such as plantings, a forebay filter media and a vegetated filter. 17- & 15. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Regional Office Inspector, Onslow County Building Inspections MAY 172021 Page 8 of 8