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HomeMy WebLinkAboutSW8060309_HISTORICAL FILE_20060501STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 O\j0300\ DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2 O pla o 60 k YYYYMMDD Michael Ir, Easley, Governor \O��F W AT F9�G May 1, 2006 .--_—William G. Ross Jr.,Sec. retary--- "'North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality Mr. Carl Baker, Director -Design Branch United States Marine Corps, Camp Lejuene 1005 Michael Road Camp Lejuene, NC 28547 Subject: Stormwater Permit No. SW8 060309 Reserve Training & Vehicle Maintenance Facility _ ___..-.-High Density -.Project- Onslow County Dear Mr Baker: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Reserve Training & Vehicle Maintenance Facility on April 26, 2006. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 060309 dated May 1, 2006, for the construction of the subject project. This permit shall be effective from the date of issuance until May 1, 2016, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the 'Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system 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 upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Robert Gordon, or me at (910) 796-7215. Sincere' �G112, EQward Bveck Regional Supervisor Surface Water Protection Section ENB/rdg: S:\WQS\STORMWAT\PERMIT\060309.may06 cc: Tim Clinkscales, PE, Paramounte Engineering Robert Gordon Wilmington Regional Office Central Files 0. Noah Carolina A nlrrra//y North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone (910) 796-7215 Customer Service 1-877-623-6748 Wilmington Regional Office Wilmington, NC 28405 Fax (910) 350-2004 Intemec www ncwatemualityor� g An Equal OpportunitylAf nnative Action Employer— 50% Recycledl10% Post Consumer Paper State Stormwater Management Systems Permit No. SWS 060309 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY 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 United States Marine Corps, Camp Lejuene Reserve Training & Vehicle Maintenance Facility Rifle Range Road, Camp Lejuene - Onslow County •C ■a construction, operation and maintenance of 3 infiltration basins in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules") and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until May 1, 2016, 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 on page 3 of this permit. Infiltration #1 has been designed to handle the runoff from 103,699 square feet of impervious area. This basin must be operated with a 50' vegetated filter. Infiltration #2 has been designed to handle the runoff from 58,415 square feet of impervious area. Infiltration #3 has been designed to handle the runoff from 7,911 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. There is no built -upon area for future development in this permit. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. Page 2 of 7 State Stormwater Management Systems Permit No. SW8 060309 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. The following design criteria have been provided in the infiltration basins and must be maintained at design condition: 1 Units5* `sf. 0 1 �r , ..,Basrn,1 Basin,3 Drainage Area Onsite Offsite Acres 4.75 4.75 0 2.21 2.21 0 0.43 0.43 0 Total Impervious Surfaces ft2 103,699 58,415 7,911 Basin Depth feet 1.89 2.22 1.95 Design Storm inches 1.5 4.5 4.5 Bottom Elevation FMSL 52.5 53.45 52.5 Permitted Surface Area Bottom ft2 4,775 7,600 855 Permitted Storage Volume ft3 12,956 55.67 3,046 Storage/Bypass Elevation FMSL 54.39 55.67 54.45 Expected Infiltration Rate in/hr 1.5 1.5 1.5 Time to Draw Down days 0.95 0.95 1.19 Type of Soil Baymeade Receiving Stream Stones Creek River Basin White Oak Stream Index Number r_:' , .fz 19-30-3 Classification of Water Body "SA;HQW" II. 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. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of 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 bypass structure, infiltration media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. Page 3 of 7 State Stormwater Management Systems Permit No. SW8 060309 5. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 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. 7. 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. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 9. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. 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. Page 4 of 7 State Stormwater Management Systems Permit No. SW8 060309 III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. Permit issued this the 1s' day of May, 2006. NOR ,l t`6AROLINA. NVIRONMENTAL MANAGEMENT COMMISSION irlL.(t fo�an Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No. SW8 060309 Reserve Training & Vehicle Maintenance Facility Stormwater Permit No. SW8 060309 Onslow County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 6 of 7 State Stormwater Management Systems Permit No. SW8 060309 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The bypass structure weir elevation is per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short- circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Regional Office Page 7 of 7 OFFICE USE ONLYi; 1: fit. - —=-zw, 1 State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION: 1. Applicant's name (specify the name of the corporation, individual, etc. who owns the project): Camp LeJeune, Reserve Training Facility & Vehicle Maintenance Facility 2. Print Owners/Signing Official's name and title (the person legally responsible for facility and compliance): United States Marine Corps; Carl Baker, Director Des4m Branch 3. Mailing Address for person listed in item 2 above: 1005 Michael Road City: Camp LeJeune State: Telephone Number: 910-451-2213 NC Zip: 28547-2521 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Reserve Trainin4 Facility & Vehicle Maintenance Facility 5. Location of Project (street address): Off Rifle Range Road Inside Camp LeJeune City: Camp LeJeune County: Onslow 6. Directions to project (from nearest major intersection): 1.8 miles from the intersection of US Hwy 17 and NC 210, take left on Rifle Range road, +/- 1 mile on left, just before existing parking lot 7. Latitude: 034°35' 16"N Longitude: 077°27' 00"W S. Contact person who can answer questions about the project: Name: Tim Clinkscales PE IL PERMIT INFORMATION: 1. Specify whether project is (check one): X New Telephone Number: Renewal of project 791-6707 Modification Form: SWU-101 Version3.99 Page I of 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): _Low Density X High Density _Redevelop _General Permit Other 4. Additional Project Requirements (check applicable blanks): CAMA Major X Sediment/Erosion Control 404/401 Permit _NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. The stormwater will be treated with the construction of 3 infiltration basins 2. Stormwater runoff from this project drains to the 3. Total Project Area: 7.4 Acres 5. How many drainage areas does the project have? White Oak River basin. 4. Project Built Upon Area: 52.6 % 6. Complete the following information for each drainage area. If there are more than two drainage areas in the Droiect, attach an additional sheet with the information for each area nrovided in the same format as below. Ba'sinAtilormiahon `�� ' ", ` 3 ' "'DFamage ' Area Total, _,` DA:#l, "'DA#2.'1 DA"#3 Receiving Stream Name Stones Creek Stones Creek Stones Creek Stones Creek Receiving Stream Class SA;I-IQW SA;HQW SA;HQW SA;HQW Drainage Area 7.4 acres 4.75 2.21 0.43 Existing Impervious* Area N/A N/A N/A N/A Proposed Impervious* Area 3.90 acres 2.38 1.34 1 0.18 % Impervious* Area (total) 52.6 50.1 60.6 1 41.9 Impervious* Surface :Area � Drainage- Basin Total-'. DA #,1. DA #2 . , � DA #3 = , On -site Buildings 31,011 sf 31,011 0 0 On -site Asphalt 7911 sf 0 0 7,911 On -site Parking 127,142 sf 69,836 57,306 0 On -site Sidewalks 3,961 sf 2,852 1,109 0 Other on -site 0 sf 0 0 0 Off site 0 sf 0 0 0 Total: 170,025 sf 103,699 58,415 7,911 * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. 7. How was the off -site impervious area listed derived? N/A Form: SWU-101 Version 3.99 Page 2 of IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, out parcels and future development prior to sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built upon area for each lot must be provided as an attachment. I. The following covenants are intended to ensure ongoing compliance with state management permit number as issued by the Division of Water Quality. These covenants my not be changed or deleted without the consent of the State. 2. No more than square feet of any lot shall be covered by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decking or the water surface ofswimming pools. 3. Swalcs shall not be filled in, piped, or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to construction. 5. All permitted runofffrom out parcels or future development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable item required above, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form (s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin SupplementForm SWU-109 Innovative Best Management Practice Supplement VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. Form: SWU-101 Version 3.99 Page 3 of 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. • Original and one copy of the Stormwater Management Permit Application Form • One copy of the applicable Supplement Form(s) for each BMP • Permit application processing fee of $420 (payable to NCDENR) • Detailed narrative description of stormwater treatment/management: • Two copies of plans and specifications, including: - Development/Project name - Engineer and firm - Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers Initials ICC' ..cc '� GC - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VI. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section: Designated agent (individual or firm): Paramounte Engineering, Inc Mailing Address: 127 Raccine Drive, Suite 202 City: Wilmington State: NC Zip: 28403 Phone: (910)791-6707 Fax: (910)763-4517 VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General information, item 2) Carl Baker certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covena ill be record and that the proposed project complies with the requirements of 15A NCAC 2H.1000 V A Signature: Date: Form: SWU-101 Version 3.99 Page 4 of Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form maybe photocopied for use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name: Reserve Training Facility & Vehicle Maintenance Facility Contact Person: Tim Clinkscales, PE Phone Number: (910) 520-1991 This worksheet applies to: Basin No. 1 in Drainage Area 1 (as identified on plans) Porn Form .SWU-101) II. DESIGN INFORMATION — Attach supporting calculations / documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean seal level (fmsl). Soils Report Summary Soil Type Baymeade Infiltration Rate 1.5 in/hr or cUhr/sf (circle appropriate units) SHWT Elevation 50 fmsl (Seasonal High Water Table elevation) Design Storm 1.5 inch (1.5 inch event for SA waters, I inch event for others) Design Volume 12,956 c.f. Drawdown Time 0.95 Days Basin Dimensions Basin Size ft. x Basin Volume Provided 13,586 c.f. Basin Elevations Bottom Elevation 52.5 fmsl Storage Elevation 54.39 fmsl Top Elevation 54.5 fmsl ft. = 4775 sq. ft. (bottom dimensions) Form SWU-103 Rev 3.99 Page 1 of 3 ,F III. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Applicants Initials -P "- a. System is located 50 feet from class SA waters and 30 feet from other surface waters. �ZC b. System is located at least 100 feet from water supply wells. T6C c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. System is not sited on or in fill material or DWQ approval has been obtained. TGC f. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. -PC g. Drainage area for the device is less than 5 acres. -rC h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. jGe i. System captures and infiltrates the runoff from the first 1.0 inches of rainfall (1.5 inch event for areas draining to SA waters). Design volume and infiltration calculations attached. J• �C TcC k. 1. T� M. UGC n. TGC o. UGC p. ?�C q• r. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V) A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. Vegetated filter is provided for overflow and detail is shown on plans (required minimum length is 50 feet for SA waters, 30 feet for other waters). Flow distribution mechanism within the basin is provided. A benchmark is provided to determine the sediment accumulation in the pretreatment device. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions with five days. A soils report and all pertinent draw -down calculations are attached. -r&G s. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. Form SWU-103 Rev 3.99 Page 2 of 3 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water shall be separation to be reduced and may comprise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads 53.0 feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. If the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for performance of the five maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Carl Baker, Director Design Brance Address: 1005 Michael Road, Camp LeJeune, NC 28547-2521 Phone: Signature: Date: V—z —�6 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/>rary Public or the State of Ado >_f t & kvt A_�s County of OJ 5 j L t, do here y certify that , personally appeared before me this Yam/ day of e01006 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal'',//� SEAL My commission expires Form SWU-103 Rev 3.99 Page 3 of 3 Permit No (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as au original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name: Reserve Training Facility & Vehicle Maintenance Facility Contact Person: Tim Clinkscales, PE Phone Number: (910) 520-1991 This worksheet applies to: Basin No. 1 in Drainage Area 2 (as identified on plans) (from Form SWU-101) II. DESIGN INFORMATION — Attach supporting calculations / documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean seal level (fmsl). Soils Report Summary Soil Type Baymeade Infiltration Rate 1.5 in/hr or cf/hr/sf (circle appropriate units) SHWT Elevation 51.0 fmsl (Seasonal High Water Table elevation) Design Storm 4.5 inch (1.5 inch event for SA waters, 1 inch event for others) Design Volume 21,238 c.f. Drawdown Time 0.95 Days Basin Dimensions Basin Size ft. x ft. = 7,600 sq. ft. (bottom dimensions) Basin Volume Provided 21,612 c.f. Basin Elevations Bottom Elevation 53.45 fmsl Storage Elevation 55.67 fmsl Top Elevation 55.7 fmsl Form SWU-103 Rev 3.99 Page 1 of 3 111. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Applicants Initials 4?G C a. System is located 50 feet from class SA waters and 30 feet from other surface waters. C b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. �c d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. System is not sited on or in fill material or DWQ approval has been obtained. f. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. 7ZC g. Drainage area for the device is less than 5 acres. h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is nC attached. i. System captures and infiltrates the runoff from the first 1.0 inches of rainfall (1.5 inch event for �G areas draining to SA waters). Design volume and infiltration calculations attached. j. System is sized to take into account the runoff at the ultimate built -out potential from all jL C surfaces draining to the system, including any off -site drainage. Calculations attached. roc k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V) 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment T(Z- trap is provided. m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or 7Ze dense vegetative cover is provided. n. Vegetated filter is provided for overflow and detail is shown on plans (required minimum length 7- is 50 feet for SA waters, 30 feet for other waters). t 6 e o. Flow distribution mechanism within the basin is provided. rt6 C- p. A benchmark is provided to determine the sediment accumulation in the pretreatment device. -7&'C q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). r. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions with five days. A soils report and all pertinent draw -down rGC calculations are attached. s. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. Form SWU-103 Rev 3.99 Page 2 of 3 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water shall be separation to be reduced and may comprise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads 54.0 feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. If the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for performance of the five maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Carl Baker, Director Design Branch Address: 1005 Micheal Road, Camp LeJeune, NC 28547-2521 Phone: Signature: Date: 7 " 7 — Q !o 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, �tAZe /ZUJ , a NotaryPublic for they"State of AOrl_fh K&.o I.. ss County of C Yl 5 if) , do hereby certify that _ �u �,rLa- personally appeared before me this q— day of 40 4. i , a U6 S , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, SEAL My commission expires A714 r1�0'0 y t I ,- Form SW U-103 Rev 3.99 Page 3 of 3 Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name: Reserve Training Facility & Vehicle Maintenance Facility Contact Person: Tim Clinkscales, PE Phone Number: (910) 520-1991 This worksheet applies to: Basin No. 1 in Drainage Area 3 (as identified on plans) (from Form SWU-101) II. DESIGN INFORMATION — Attach supporting calculations / documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean seal level (fmsl). Soils Report Summary Soil Type Baymeade Infiltration Rate 1.5 in/hr or cf/hr/sf (circle appropriate units) SHWT Elevation 50.0 frisl (Seasonal High Water Table elevation) Design Storm 4.5 inch (1.5 inch event for SA waters, 1 inch event for others) Design Volume 2,997 c.f. Drawdown Time 1.19 Days Basin Dimensions Basin Size ft. x ft. = 855 sq. ft. (bottom dimensions) Basin Volume Provided 3046 c.f. Basin Elevations Bottom Elevation 52.5 fmsl Storage Elevation 54.45 fmsl Top Elevation 54.5 fmsl Form SWU-103 Rev 3.99 Page 1 of 3 III. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Applicants Initials a. System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. -rGL c. Bottom of system is at least 2 feet above the seasonal high water table. TGL d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. GG e. 'GL �G —16c System is not sited on or in fill material or DWQ approval has been obtained. Drainage area for the device is less than 5 acres. i. System captures and infiltrates the runoff from the first 1.0 inches of rainfall (1.5 inch event for T6G ched. ial from all areas draining to SA waters). Design volume and infiltration calculations atta j. System is sized to take into account the runoff at the ultimate built -out potent surfaces draining to the system, including any off -site drainage. Calculations attached. wale or sediment -rGL k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (I-I:V) 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed S 76G h of 4 inches or trap is provided. in. Bottom of the device is covered with a layer of clean sand to an average dept dense vegetative cover is provided. n. Vegetated filter is provided for overflow and detail is shown on plans (required minimum length �C is 50 feet for SA waters, 30 feet for other waters). 'rGC o. Flow distribution mechanism within the basin is provided. 2C p. A benchmark is provided to determine the sediment accumulation in the pretreatment device. �Z < q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). r. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions with five days. A soils report and all pertinent draw -down —rGC calculations are attached. s. Plans ensure that the installed system will meet design specifications (constructed or restored) a is stabilized. C' upon initial operation once the project is complete and the entire drainage are IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. Form SW U-103 Rev 3.99 Page 2 of 3 . . . 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the. structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water shall be separation to be reduced and may comprise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads 53.0 feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. If the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for performance of the five maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Carl Baker. Director Desien Branch Address: 1005 Michael Road, Camp LeJeune, NC 28547-2521 Phone: Signatu 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 r the State of /�/ Gd , County of do hereby certify that 96v4/ personally appeared before me this day of , -,2406 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, SEAL My commission expires ,5CP aim aeao Form SWU-103 Rev 3.99 Page 3 of 3 State Stormwater Management Systems Permit No. SW8 060309 Reserve Training & Vehicle Maintenance Facility Stormwater Permit No. SW8 060309 Onslow Court Designers CartMeation I.., as a duly registered in the State of North Carolina, having been authorized to observe (periodically) full time) the construction of the project, !9 for V S KWfA/L- LWS (Project Owner) hereby state that, to the best of my abilities, due pre and diligence was used In the observation of the project construction such that the construction was observed to be bulk within substantial compliance and intent of the approved plans and specifications. The checMist of items on page 2 of this form is Included in the Certification. Noted deviations from approved plans and spedfication: Fliiy.r{r.n..,r +�'3 w.IIs, licM•'�rJr �'�" G<%�tf il�i„y // Nc. GJ'�'' Cwtk- NrRQrir1+�+Nr�•'G'.�lr C.wA✓.�r�r... t.� fa i f• Lu l7✓•*..,�i,foeN .� l;fiw*3 'fix /I�rrrviw> S C1l7�;,`, P�� VSL ':, Signature - _ 31185 Registrati Number 3li �� y ..,or �P•'`y:; Date 73 /tf 2 2w s � g�Aa. f l AUG 102022 Page 8 of 7 BY.- �.' State Stormwater Management Systems Permit No. SW8 060309 Certification Requirements: "0 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 pi 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. V�" The bypass structure weir elevation Is per the approved plan. +mow mow6. The bypass structure is located per the approved plans. tr�nw"" 7. A Trash Rack is provided on the bypass structure. N+r r- hwi+ 8. All slopes are grassed with permanent vegetation. Vegetated slopes are no steeper than 3:1. 10. The Inlets are located per the approved plans and do not cause short- arculting of the system. b1. The permitted amounts of surface area and/or volume have been / provided. 1nY�JZ All required design depths are provided. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Regional Office Page 7 or 7 AVG 10 20V r fly.--_ 1 2 7 R A C IN E DR IV E, S U I T E 2 0 2 W I L NI I N G T O N, N C 2 8 4 0 3 9 1 0- 7 9 1- 6 7 0 7( O ) 9 1 0- 7 6 3- 4 5 1 7 ( F) L E T T E R O F T R A N S M I T T A 1. gi$1'To "; NCE)ENR IDatej{i! 4/26/06 nRe`'El.i Reserve Training Facility Rob Gordon y 91, Pm ecr.No,.:rx 06103.PEI ❑ Originals ® Prints ❑ Shop Drawings ® Calculations M46116 iii"':i&irr6:1 ❑ Correspondence ® Plans ❑ Specifications ❑ Other as listed below '�;Qyannty,,���,liili� I II t Date,�i� uI R A x pi { Dwg.lj�To ,� ., q IIU V�7 (. �'i� N' i r tl t ii•i a"-n �qin tl U tl'I II -iliR v It it �nil�w6stllyii6li� � (9}rvlllVeJi 3�h�U��ii , {,ft'� Descnprion iiil.lillb�wL�y�1Wi'. (� I'piln�iu:��li� �,.P:+Irilt. 2 4/6/06 G001, CS101,CG101, CG 501 Plans for Stormwater 1 4/6/06 Updated Calculations (Signed) 1 Response Letter Iss'iie'Statis: ® For Approval ❑ As Requested ❑ Construction ❑ Bid ❑ For Your Use ❑ For Review and Continent ❑ Approved as Noted ❑ See Remarks ❑ No Exceptions Taken ❑ Make Corrections Noted ❑ Amend & Resubmit ❑ Rejected - See Remarks ❑ Approved as Submitted ❑ Other Rema'iks. W)"I11i U"" 5tgIned-r!ii . 1 4 Tim Clinkscales,PE 7AP CEYR 2 6 2006 -ARAMOUNTF E, N a I N E E R I N ❑, I N. C April 20, 2006 Robert Gordon NCDENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 RE: Stormwater Project No. SW 8 060309 Reserve Training & Vehicle Maintenance Facility Onslow County Dear Mr. Gordon: Thank you for your comment letter dated April 18, 2006 regarding the above -mentioned project. Your comments (in bold) are provided below followed by our responses (in italic): 1. Please provide a little more detail on the vegetated filter (width, slope, level spreader, etc). A width of 10 feet was added to sheet CG501, the slope was added to CG101 (2%). 2. Please provide the swale spot elevations on basin #1 as indicated. • These spot elevations were added to sheet CGI01. I trust that our responses have satisfactorily addressed your comments. Please feel free to contact me should you have further questions after reviewing our responses and the enclosed materials. Thank you for your assistance with this project. Tim Clinkscales,PE 1 2? RACINE ❑ R I V E, 6❑ I T E 2❑ 2. W I L M I N B T❑ N, N C 2 B 40 3 P H: 1 9 1❑) 7 9 1- 6 90 7 F A X: 1 9 1 ❑) 9 6 3- 4 5 1 9 * * * COMMUNICATION RESULT REPORT ( APR.18.2006 7:49AM ) * * * P. 1 FILE MODE 088 MEMORY TX OPTION REASON FOR ERROR E-1) HANG UP OR LINE FAIL E-3) NO ANSWER ADDRESS (GROUP) 97634517 TTI NCDENR WIRO UL—Tll PAGE K i P. 1/1 E-2) BUSY E-4) NO FACSIMILE CONNECTION FAX COVER SHEET Date: April 18, 2006 No. of Pages: 3 To: Tim Clinkscales, PE From: Robert Cordon Express permitting sect lon Company: Paramounte Engineering FAX # 910-350-2004 FAX #: 763-4517 Phone # 910-796-7303 DWO Stormwater Project Number: SW8 060309 Project Name: Camp Lejuene Reserve, Training Facility MESSAGE: There are just a few items I need to issue the Reserve Training Facility Permit. ■ Please provide a little more detail on the vegetated filter (width, slope, level spreader etc... ) • Please provide the swale spot elevations on basin #1 as indicated (might have been a plot issue — there were callouts, but no elevations on the drawings) ■ Please PE stamp the updated calculations. ■ Please provide 2 copies of any modified sheets (I need the 2"d copy of any sheets that do not change as a result of this modification and 2 more FAX COVER SHEET Date: April 18, 2006 No. of Pages: 3 To: Tim Clinkscales, PE From: Robert Gordon Express permitting sect Cogn Company: Paramounte Engineering FAX # 910-350-2004 FAX #: 763-4517 Phone # 910-796-7303 DWQ Stormwater Project Number: SW8 060309 Project Name: Camp Lejuene Reserve Training Facility MESSAGE: There are just a few items I need to issue the Reserve Training Facility Permit. • Please provide a little more detail on the vegetated filter (width, slope, level spreader etc...) • Please provide the swale spot elevations on basin #1 as indicated (might have been a plot issue — there were callouts, but no elevations on the drawings) • Please PE stamp the updated calculations. • Please provide 2 copies of any modified sheets (I need the 2nd copy of any sheets that do not change as a result of this modification and 2 more copies of any sheets that do change). Please call if you have any questions. Thanks! _ &Ri O � . Ems., N G I N E E R I N 6, 1111 N.•,,j a 1 2 7 R A C I N E D R I V E S U I T E 2 0 2 W I L M I N G T O N, N C 2 8 4 0 3 9 1 0- 7 9 1- 6 7 0 7( O) 9 1 0- 7 6 3- 4 5 1 7 ( F) L E T T E R O F T R A N S M I T T A L �To:':. NCDENR Date'' 4/6/06 Re: i Reserve Training Facility Attni Rob Gordon Project No.', J 06103.PEI e are'sendin ❑ Originals ® Prints ❑ Shop Drawings ® Calculations ❑ Correspondence ® Plans ❑ Specifications ❑ Other as listed below he following items .: uann Q tY `� ,.' ' Date'! D`'w No.:. g• _. '. ,.': ' Descri- tlon t � p 1 4/6/06 G001, CS101,CG101, CG 501 Plans for Erosion Control Review 1 3/8/06 Stormwater Permits (SW101,SW103 (3)) ssueStatus: ® For Approval ❑ As Requested ❑ Construction ❑ Bid ❑ For Your Use ❑ For Review and Comment ❑ Approved as Noted ❑ See Remarks etion Taken: ❑ No Exceptions Taken ❑ Make Corrections Noted ❑ Amend & Resubmit ❑ Rejected - See Remarks ❑ Approved as Submitted ❑ Other Remarks. CcLSigned: (� Tim Clinkscales,PE APR 0 7 2006 I _P A Oar- T -AR, M E, N G I N E E R 1 N G, I N. C March 15, 2006 Robert Gordon NCDENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 RE: Stormwater Project No. SW 8 060309 Reserve Training & Vehicle Maintenance Facility Onslow County Dear Mr. Gordon: Thank you for your comment letter dated March 15, 2006 regarding the above - mentioned project. Your comments (in bold) are provided below followed by our responses (in italic): 1. Please sign the application and all supplements (provide original signatures). Please indicate the title of the applicant on the application. The original signature permits are submitted 2. The soils report gives a range of the infiltration rate (1.5-2). Please use the conservative end of that range • The numbers in the supplement will reflect this change 3. The SHWT listed on the supplement for basin 3 appears incorrect • This value in the supplement has been changed to 50.0 which is 5.5 below the existing grade in the area around basin I. 4. Please provide a detail of the vegetated filter • This is provided on sheet CG501 5. Please provide a vicinity map on the drawings • This will be added to the survey drawing 6. Please provide a few spot elevations on the west entrance of basin 1. The contours do not clearly show that runoff will enter the basin before bypassing • Spot elevations have been added for clarity to show runoff to be conveyed into the infiltration basin. 7. The line weights used, make it difficult to distinguish between contour lines, pavement boundaries, dimension lines, etc. (especially on the West side of the project where there is no curb.) Please clarify. This lines in the west side of the parking area have been changed to make it easier to distiguish. 1 2 7 R A C I N E D R I V E S ll 1 T E 20 2 W I L M 1 N G T❑ N, N C 2 B 40 3 P H: ( 9 1 0 1 7 9 1- 6 7❑ 7 F A X: l 9 1❑ I 9 5 3- 4 5 1 V S. It appears the 7,911 sf listed on the application for DA#3 is incorrectly listed as sidewalk. • This area has been placed in the asphalt area in the permit 9. Please add a note to the drawing indicating there are no wetlands present on site. There is a note in the narrative. • This note has been placed on the survey drawing 10. Please provide a few more dimensions to the proposed BUA (sidewalks, typical radii, etc.) • Extra dimensions have been added to the drawing, It is shown on the grading plan 11. Please show the SHWT on each basin cross section • This is updated in the details for the infiltration basins 12. Please provide a map showing where the soil boring(s) were taken, both by Terracon & Vincent Lewis. • This is shown on the grading sheet. Vincent took samples at the two locations along with his knowledge of the rate of the existing parking lot on the north side of the site. Based on this, he deemed it not necessary to perform the third one. Both of his test agreed with the results given by Terracon and the previous permitted project. 13. The total BUA listed on the supplement on the application for DA#2 does not equal the sum of the figures listed for parking, sidewalks, etc. • This has been updated on the Stormwater Supplement. 14. Please include a Camp Lejuene project or "p" number, if one exists for the project. • N64270-05-C-5021 I trust that our responses have satisfactorily addressed your comments. Please feel free to contact me should you have further questions after reviewing our responses and the enclosed materials. Thank you for your assistance with this project. Tim Clinkscales,PE 1 2 9 R A C I N E D R I V E. S U I T E 2 C 2. W I L M I N G T C N, N C 2 8 4 G 3 P H: (9 1 G) 7 9 1- 6 7 0 7 F A X: (9 1 O) 9 6 3- 4 5 1 9 P. 1 * * COMMUNICATION RESULT REPORT ( L.15.2006 9:03AM ) TTI NCDENR WIRO FILE MODE OPTION --- --- - ADDRESS -(GROUP) -- ---RPRGE-- // -- 458 MEMORY TX 97634517 -- OK ) ----- P. 3i3 REASON FOR ERROR E-1) HANG UP OR LINE FAIL E-3) NO ANSWER E-2) BUSY E-4) NO FACSIMILE CONNECTION FAX COVER SHEET No. of Pages: 3 Date: March 15, 2006 From: Robert Gordon To: Tim Clinkscales, PE Express permitting section Company: Paramounte Engineering FAX # 910-350-2004 FAX #: 763.4517 Phone # 910-796-7303 DWQ Stormwater Project Number: SWS 060309 Project Name: Reserve Training & Vehicle Maintenance Facilities MESSAGE: Attached is the request for additional information the Reserve Training & Vehicle will)ntenance Facilities. also be ma ledto you h Please callif ll be mailel if you have any questions.and a copy FAX COVER SHEET Date: March 15, 2006 No. of Pages: 3 To: Tim Clinkscales, PE From: Robert Gordon Express permitting section Company: Paramounte Engineering FAX # 910-350-2004 FAX #: 763-4517 Phone # 910-796-7303 DWQ Stormwater Project Number: SW8 060309 Project Name: Reserve Training & Vehicle Maintenance Facilities MESSAGE: Attached is the request for additional information the Reserve Training & Vehicle Maintenance Facilities. The original will be mailed to the applicant and a copy will also be mailed to you. Please call if you have any questions. Michael 17. Easley, Governor William G, Ross Jr., Secretary North Carolina Department of Environment and Natural Resources O March 15, 2006 David Washburn United States Marine Corps 1005 Michael Road Camp Lejuene, NC 28547 Subject: Request for Additional Information Stormwater Project No. SW8 060309 Reserve Training & Vehicle Maintenance Facilities Onslow County Dear Mr. Washburn: Alan W. Klimek, P.E. Director Division of Wafer Quality The Wilmington Regional Office received a Stormwater Management Permit Application for Reserve Training & Vehicle Maintenance Facilities on March 8, 2006. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review. 1. Please sign the application and all suppl is (provide original signatures). Please indicate the title of the applicant on the application. 2. The soils report gives a range of the infiltration rate (1 — 2). Please use the conservative end of that range (1.5). ` 3. The SHWT listed on the supplement f�basin 3 appears incorrect. 4. Please provide a detail of the vegetated filter. V 5. Please include a vicinity map on the drawings v/� 6. Please provide a few spot elevations on the west entrance of b� in 1. The contours do not clearly show that runoff will enter the basin before bY`Passifig� 7. The line weights used make it diffict {to distinguish. between contour lines, pavement boundaries, dimension lines etc. (epecially on the West side of the project where there is.no curb. Please clarify. 8. It appears the 7,911 sf listed onLtb/application for DA#3 is incorrectly listed as sidewalk. 9. Please add a note to the drawings indict/nathere are no wetlands present on site. There is a note in the narrative. 10. Please provide a few more dimensionsvt the proposed BUA (sidewalks, typical radii etc) 11. Please show the SHWT on each basin x-section. "r NoorthCarolina 11Vrrturally North Carolina Division of Water Qmdity 127 Cardinal Drive Extension Phone (910) 796-7215 Customer Service 1-877-623-6748 Wilmington Regional Office Wilmington, NC 29405 Fax (910)350-2004 Internet www. ncwalerqualitv,og An Equal OpportuntlylAffirmative Action Employer— 50 % Recycled110% Post Consumer Paper Reserve Training &Vehicle Maintenance Facility March 15, 2006 Stormwater Permit # SW8 060309 12. Please provide a map showing where the soil boring(s) were taken, both by Terracon & Vincent Lewis. 13. The total BUA listed on the application for DA #2 does not equal the sum of the figures listed for parking, sidewalks etc. 14. Please include a Camp Lejuene project or "p" number, if one exists for the project. Please note that this request for additional information is in response to a preliminary review. The requested information should be received by this Office prior to March 27, 2006, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 796-7303, Sincerely, J `6-0 Robert D. Gordon Environmental Engineer II ENB/RDG: S:\WQS\STORMWATER\ADDINFO\2006\060309Mar15 cc: Tim Clinkscales, PE, Paramounte Engineering Robert D. Gordon TopoZone - The Web's Topographic Map Page 1 of I S0*0I tRi42'.I�j Mipf s Ar a a h qMkc', tj f . ,, �✓!--��.� , � � - C � ii \ , i , W tl to 3 14 r'><; _ ✓ !ply x�`v"l { II �� �p� M II" li tom' --- J *MlPhln / rv' 1Y s 101 at r�-�� ` JV 0 0.3 0.6 0.9 1.2 1.5 km 0 0.1 0.2 0.3 0.4 0.5 mi Map center is 340 35' 16"N, 770 27' 00"W (WGS84/NAD83) Sneads Ferry quadrangle Projection is UTM Zone 18 NAD83 Datum M* M=-9.39 G=-1.392 http://www.topozone.com/print. asp?z=18&n=383005 8.96897763 &e=275293.511227707&. 3/14/2006 PARIAMO E: N G 1 N E E R I N G, I N. C 1 2 7 R A C I N E D R I V E S U I T E 2 0 2 W I L M I N G T O N, N C 2 8 4 0 3 9 1 0- 7 9 1- 6 7 0 7( 0) 9 1 0- 7 6 3- 4 5 1 7 ( F) L E T T E R O F T R A N S M I T T A L To:. NCDENR Date 3/9/06 Re: Reserve Training Facility 'A":.' Cameron Weaver Project No. I 06103.PEI e. are sendin ❑ Originals ® Prints ❑ Shop Drawings ® Calculations ❑ Correspondence ® Plans ❑ Specifications ❑ Other as listed below he following g items. Quantity: Date, Dwg. No. Description 3 3/8/06 G001, CG101,CG102, CG103, CG 501 flans for Erosion Control Review 3 3/8/06 Erosion Control Narrative 1 3/8/06 Financial Responsibility Form 2 3/8/06 G001, CG101CG102, CC, 16, CC, 501 Plans for Storrnwater Review 2 3/8/06 Stormwater Narrative 1 3/8/06 Stormwater Permits (SW101,SW103 (3)) 1 3/8/06 Check # 015701 Issue'Stams: ® For Approval ❑ As Requested ❑ Construction ❑ Bid ❑ For Your Use ❑ For Review and Comment ❑ Approved as Noted ❑ See Remarks etion Taken: ❑ No Exceptions Taken ❑ Make Corrections Noted ❑ Amend & Resubmit ❑ Rejected - See Remarks ❑ Approved is Submitted E] Other Ren>.arks: f eC- P~ 1L fa�lt- Ti a Tim Clinkscales,PE ��10�0 RESERVE TRAINING FACILITY & VEHICLE MAINTENANCE FACILITY ONSLOW COUNTY, NC DESIGN AND STORMWATER NARRATIVE Prepared for: NAVFAC_ 1005 Micheal Road CAMP LEJEUNE, NC 28547 Prepared by: PARAMOUNT , 127 Racine Drive, Suite 202 Wilmington, NC 28403 Project #06103.PE March 2006 Uh MAR 0 8 2006 BY:_-- RESERVE TRAINING FACILITY & VEHICLE MAINTENANCE FACILITY ONSLOW COUNTY, NORTH CAROLINA Project #06103.PE Table of Contents Design Narrative Proposed Improvements / Stormwater NC DENR Infiltration Basin Calculations Soils Scientist Report USGS Quad Map Page i RESERVE TRAINING FACILITY & VEHICLE MAINTENANCE FACILITY ONSLOW COUNTY, NORTH CAROLINA DESIGN NARRATIVE NAVFAC is proposing the construction of a Training Facility (26,500 sf) and Vehicle Maintenance Facility (3050 sf). The property boundary will be determined by placing a fence at the desired locations. The impervious area will be approximately 3.9 acres with a disturbed area of 7.4 acres. The property currently is wooded and grassland. It is bordered by an existing parking lot to the north, Rifle Range Road to the east, and woods and grassland to the south and west. The site is located +/- 1 mile on the left side of Rifle Range Road inside Camp Lejeune, 1.8 miles from the intersection of US Hwy 17 and NC 210. The project is within a drainage basin which drains to the White Oak River. The receiving stream is Stones Creek (SA, HQW, 1.5" runoff). The runoff will be conveyed through the use of 3 infiltration basins which are designed to remove 90% of the TSS. The seasonal high water elevation was determined to be 5.5 feet, this information is placed in the report supplied by Terracon (Consulting Engineers & Scientists) and confirmed by Vincent Lewis of NCDENR on March 7. The infiltration rate was determined to be 2 inches/hours. Both of these items are shown in the soils report Infiltration basin #1 will retain the first 1.5-inches of rainfall, dual bypass weirs at elevation 16.6 m (54.45 ft) will be placed at the inlet locations. A 50' vegetative buffer will be placed at the end of the bypass systems. Infiltration basin #2 and #3, will retain the first 4.5 inches of rainfall; this allows no bypass or overflow to be placed in the system. The flow into the systems will be directed through sheet flow into swales for basin #1 and curb cuts in basins #2 and #3. No wetlands are located on the site. PROPOSED IMPROVEMENTS / STORMWATER The stormwater will be treated through the use of 3 infiltration basins. They will be conveyed to the basins through sheet flow on the site. The design took into account the treatment of the 1.5 inch of runoff. The soil on the site is Baymeade, based on the Onslow County Soil Survey For treatment calculations the procedure in the NCDENR stormwater best management practices manual was used to determine the volume and drawdown needed for the basins. For basin #1, the required volume for the 1.5 inch rainfall was 12,956 cf, the provided volume at elevation 16.6 (54.45) is 13,586; therefore the 1.5-inch elevation is 54.39 ft. A pair of bypass weirs at elevation 16.6 (54.45) are placed to convey the rainfall above the 1.5-inch storm. A 50 Page 1 foot vegetative filter is placed for each of the bypass weirs. For basin #2, the basins top elevation is 17 m (55.7 ft), the required volume for the 4.5-inch rainfall is 21,238 cf, the provided volume is 21,612 cf; the 4.5-inch elevation is 55.67 ft. For basin #3, the basins top elevation is 16.6 m (54.5 ft), the required volume for the 4.5-inch rainfall is 2,997 cf, the provided volume is 3046 cf, the 4.5-inch elevation is 54.45 ft. For all the BMP's, the drawdown was determined to be less than the 5 day state requirement. All supporting drainage calculations, drainage basin and infiltration basin information are provided within, the following pages of this report. MAINTENANCE Contractors shall be responsible for periodic inspection and maintenance of all indicated erosion control devices. In addition, inspection and any necessary maintenance will be required immediately following any significant storm event. Any erosion control measure that fails to function as intended shall be repaired immediately. Upon completion of construction and the establishment of stabilized ground cover, the property owner shall be responsible for any on going site maintenance. Page 2 Basin #1 Infiltration Pond Calculations Reserve Training Facility & Vehicle Maintenance Facility NC DENR Retention Requirements Objective.' design an infiltration basin with the folluwing characteristics: bottom of basin 2-feet above seasonal high water level and drawdown less than 5 days; a volume that meets TSS removal requirements (values set by NC DENR) Step 1: Determine the surface area required for 90% TSS removal Post -Development conditions Total Drainage Area 4.75 ACRE Impervious Drainage Area 2.38 ACRE Impervious Cover 50.1 % Value from CAD Value from CAD Impervious Cover --(Impervious Drainage Area)/(Total Drainage Area)*100% Elevation of Bottom of Infiltration Basin 52.5 FT Value selected by designer Depth of Infiltration Basin 2.0 FT Elevation of 1.5 inch elevation 54.5 FT (Bottom Elevation)=(Permanent Pool Surface Approximate Pond Length 150 FT Elevation) -(Depth of Permanent Pool) Value from CAD A roximate Pond Width 50 FT Value from CAD Length:Width Ratio 3:1 2: runoff Required 1.5" Runoff Volume (Volume of Temporary Pool) the 1. 12,956 CF 1.5"RunoffVolume=1.5inch'Rv'1 foot/12 inch'(Total Drainage Area) mnrravon rare 1.50 IN/HR Value given by Soil Scientist Top Elevation of Basin 54.50 FT Value chosen by designer Total Volume of Basin 13,585.99 FT Bottom Surface Area 4,775.00 FT Taken from Contours from Plan 'pia+',\ti •!v;'`,•�" o j rdra•:e; �'4nr' RECEIVED APR 2 6 2006 BY: P:\Projects\Freeland-Clinkscales\06103.PE-Camp Lejeune\Documents\Design Calculations\Hydro\lnfikration Basin 1 Reserve Training Facility & Vehicle Maintenance Facility Stage -Storage Calculations for Proposed Infiltration Basin #1 determine the storage capacity and characteristics of the proposed infiltration basin ;remental and cumulative storage of the infiltration basin per contour interve age/Storage Above Permanent Pool (Including Forebay) Cumulative Contour Incremental Volume, S Contour Area (SF) Volume (CF) 52.50 4,775 0 �(—C�F —� l_ J - Permanent Pool 53.20 6,082 3,800 3,800 53.80 7,450 4,059 7,859 54.39 12,956 1.5" Elevation 54.5 8,912 5,727 13,586 P:\Projects\Freeland-Clinkscales\06103,PE-Camp Lejeune\Documents\Design Calculations\Hydro\Infiltration Basin 1 Basin #2 Infiltration Pond Calculations Reserve Training Facility & Vehicle Maintenance Facility NC DENR Retention Re uiremenis Objective: design an infiltration basin with the following characteristics: bottom of basin 2-feet above seasonal high water level and drawdown less than 5 days; a volume that meets TSS removal requirements (values set by NC DENR) Step 1: Determine the surface area required for 90% TSS removal Post -Development Conditions Total Drainage Area 2.21 ACRE Impervious Drainage Area 1.34 ACRE Impervious Cover 60.6% Value from CAD Value from CAD Impervious Cover --(impervious Drainage Area)/(Total Drainage Area) `100% Elevation of Bottom of Infiltration Basin 53.4 FT Value selected by designer Depth of Infiltration Basin 2.4 FT Elevation of 1.5 inch elevation 55.7 . FT (Bottom Elevation)=(Permanent Pool Surface Approximate Pond Length 260 FT Elevation) -(Depth of Permanent Pool) Value from CAD Approximate Pond Width 45 FT Value from CAD IL ng h: our Ratio 6.1 Raline/I ann{hl//L1A.U6�.� 1 the 1 Required 1.5 Runoff Volume (Volume of Temporary Pod) within 21,505 CF 4.5rRunoff Volume=4.5inch'Rv'1 f0002 inch'(Total Drainage Area) orelu v: venry mar nme required to drawdown the 1 5-inch runoff volume is within 2 to 5 days Infitratwn Rate 1.50 IN/HR Value given by Soil Scientist Top Elevation of Basin 55.70 FT Value chosen by designer Total Volume of Basin - 21,611.70 FT' Bottom Surface Area 7.600.00 FT Taken from Contours from Plan H C Arp "6r. ( O/ All 2 6 2006 w P:\Projects\Freeland-Clinkscales\06103.PE-Camp Lejeune\Documents\Design Calculatlons\Hydro\l filtrabon Basing Reserve Training Facility & Vehicle Maintenance Facility Stage -Storage Calculations for Proposed Infiltration Basin #2 determine the storage capacity and characteristics of the proposed infiltration basin incremental and cumulative storage of the infiltration basin Stage/Storage Above Permanent Pool (Including Foret contour interval. Cumulative Contour Incremental Volume, S Contour Area (SF) Volume (CF) CF)CF) 53.45 7,600 0 L 0 Permanent Pool 53.80 8,300 2,782 2,782 54.50 9,400 6,195 8,977 55.10 10,550 5,985 12,956 56.67 21,358 1.5" Elevation 55.7 11,657 12,634 21,612 P:\Projects\Freeland-Clinkscales\06103.PE-Camp Lejeune\Documents\Design Calculations\Hydro\Infiltration Basin2 Basin #3 Infiltration Pond Calculations Reserve Training Facility & Vehicle Maintenance Facility NC DENR Retention Requirements Objective: design an infiltration basin with the following characteristics: bottom of basin 2-feet above seasonal high water level and drawdown less than 5 days; a volume that meets TSS removal requirements (values set by NC DENR) Step 1: Determine the surface area required for 90% TSS removal Poet -Development Conditions Total Drainage Area 0.43 ACRE Value from CAD Impervious Drainage Area 0.18 ACRE Value from CAD Impervious Cover 41 9% Impervious Covem-(Impervious Drainage Area)/(Total Drainage Area)`100% Elevation of Bottom of Infiltration Basin 52.5 FT Value selected by designer Depth of Infiltration Basin 2.0 FT Elevation of 1.5 inch elevation 54.5 FT (Bottom Elevation)=(Permanent Pool Surface Approximate Pond Length 9 70 FT Elevation) -(Depth of Permanent Poot) Value from CAD Approximate Pond Width 17 FT Value from CAD emam:WIdth Ratio 4:1 Ratio=(Length)/(lMdth)1 Step 2: Determine the 1.54nch runoff elevation within the wet detention pond Runoff Coefficient, Rv 0.427 WIN Rv=0.05+0.009`(% Impervious) Required 1.5' Runoff Volume (Volume of 2987 CF 4.5" Runoff Volume-4.51nch"Rv"1 foot/12 Temporary Pool) , inch'(Total Drainage Area) Step 4: Verify that time required to drawdown the 1.5-inch runoff volume is within 2 to 5 days. Infitration Rate 1.50 INIHR Value given by Soil Scientist Top Elevation of Basin 54.50 FT Value chosen by designer Total Volume of Basin 3,046.07 FT3 Bottom Surface Area 854.60 FT' Taken from Contours from Plan Drawdown Time for 1.5-inch Runoff 1.19 DAYS (Drawdown Time)=(1.5-inch voluma/bottom ^SaaYligtFY iigIJV 7c(, V o J'•a i �Y l•I_ 1N'l��y.�. . 4 RE126� F TF,D AP006 BY: P:\Projects\Freeland-Clinkscales\06103.PE-Camp Lejeune\Documents\Design Calculations\Hydrollnflitration Basln3 Reserve Training Facility & Vehicle Maintenance Facility Stage -Storage Calculations for Proposed Infiltration Basin #3 determine the storage capacity and characteristics of the proposed infiltration basin and cumulative Stage/Storage Above P Contour Contour Area (SF) 52.50 855 53.15 1,275 53.80 1,727 54.45 54.50 2,211 of the infiltration basin per contour interval. rmanent Fool (Including Forebay) Cumulative Incremental Volume, S Volume (CF) (CF) 0 -Permanent Pool 692 692 976 1,668 2,997 1.5" Elevation 1,378 3,046 P:\Projects\Freeland-Clinkscales\06103.PE-Camp Lejeune\Documents\Design Calculations\Hydro\Infiltration Basin3 W, February 13, 2006 The Benham Companies, LLC 9400 N. Broadway, Suite 300 Oklahoma City, OK 73114-7401 Attention: Mr. Edward Kochick Subject: Stormwater Detention Considerations Marine Reserve Training Center MCB Camp LeJeune, North Carolina Terracon Project No. 70055102 Dear Mr. Kochick: Irerracon Coneul0ng Engineers & Scientists Terracon Consultants, Inc. 5240 Greens Dairy Road Raleigh, North Carolina 27516 Phone 919.873,2211 Fax 919.873.9655 aww.torracan.com Terracon performed field and laboratory testing to evaluate the soil infiltration rate for use in designing a stormwater detention pond at the proposed Marine Reserve Training Center (MRTC) to be located at MCB Camp LeJeune, North Carolina. We previously performed a subsurface exploration for the project and submitted the results in our geotechnical engineering report dated January 24, 2006. For the additional testing, we performed a field density test using the sand cone method and collected a sample of the on -site soil to return to our laboratory for remolded permeability, testing. The sample was remolded in the.laboratory to near the field density. The results of the permeability test indicate a hydraulic conductivity value of 1.36x10' cm/sec. Based on the results of the laboratory testing and our experience with similar materials, we recommend using an infiltration rate of 1.5 to 2 inch/hour for design of the stormwater detention pond. The results of the field density test and permeability test are attached. Additionally, we estimate a seasonal high water level for the site on the order of 5.5 feet below the current ground surface. This estimate is based on the groundwater level observations in our borings during the geotechnical exploration as well as the moisture and color profile of the soil. Delivering Success /or Clients and Employees Since 1965 More Than70 Offices Nationwide Marine Reserve Training Center Terracon Project No. 70055102 MCB Camp LeJeune, North Carolina February 13, 2006 We appreciate the opportunity to be of service to you on this project. If you have any questions Concerning this letter, or if we may be of further service to you in any way, please do not hesitate to contact us. Sincerely, OE:& lrerracoSM n 9�03 GMatthew S. Balven, P.E. . Barney le, P.E. Project Engineer 8' t� Principal North Carolina No. 030731 North Carolina No. 11285 Attachments Copies to: Addressee (3) 2006 8:350 T1RfiA O:"+ fi�,,C l_ 1'p, 07� 2 PERMEABILITY TEST REPORT TEST DATA: SAMPLE DATA: Specimen height (cm): 10.15 Sample Identification: BORING B-2 Specimen Diameter (am): 7.03 HAND AUGER SAMPLE Dry Unit Weight (pcf): 95:6 visual Description: TAN BROWN SLIGHTLY Moisture Before Teat (`Y): 11.6 SILTY FINE SAND Moisture After Test (R): 25.6 Remcrk9: ASTM D5084 Run Number: 1 • 2 Cell Pressure Cps;): 42.0 42.0 Moxlmum Dry Density (pcf): Test Pressure(psi): 40.5 40.5 Optimum Moisture Content Back Pressure(psi): 40.0 40.0 Diff. Head (psi): 0.5 0.5 Percent Compaction: Flow Rate (cc/sec):1.go . to--1 1.11 . to--7 Permeometer type: Flexible wall Perm. (cm/sec):. 1.36x 10--3 1.5o. 10--! Sample type: REMOLDED TIME - t (sec) O 25 50 75 100 O u 2 U v a 4 FT I O 8 q1 O J 10 1 y1. 10--2 T \ a. 70--3 t1 E U 9. 10- 3 v Y 4 x 10—b H H ti+ J m4 7 x t0 _! J W -1 6. 1 x 10'-3 0 5 10 15 20 AVERAGE HYDRAULIC GRADIENT - dH/L (cm/cm) Project: STONE BAY tAARINE BASE Project No.: 70055102 Location: CAMP LEJEUNE, NORTH CAR7REPORT File No.: Date: 2/13/2006 Lab No.: Tested by: MTS PERMEABILITY TEST Checked by: CFB CFF TITAN ATLANTIC GROUP, C _ Test: cH - canstanaC FIELD DENSITY TESTING 1rerracon Report Number: 70055102.0002 Service Date: February 6, 2006 52a0 Greens Dairy Road Raleigh. NC 27616 ' (919)873-2211 Client: Report Date:LL February 07, 2006 Benham Companies LLC Project: NC MRTC Project Attn: Doug Shepard Camp LeJeune 9400 N. Broadway Jacksonville, NC 9400 N. Broadway OK 73114 Field Test Data Test No. Test Location Test results on this report meet project specification. Field Test Method:ASTM D-1556, ASTM D-1556 Report Distribution-. in Swo m Companies LLC Project No.: 70055102 Probe Water Dry Unit Dry Unit Lift/ Mat. Depth Content Weight Weight Elev. No. (inches) ("/6) (pef) (%compaction) 1 9.0 96.6 0.0 Reviewed by -%/,$C%J1111—y` Matthew S. Balven Professional 11 IGeolengr) The tests were performed in general accordance with applicable ASTM, AASHTO, or DOT test methods. This report is exclusively for the use of the client indicated above and shall not be reproduced except In full withou: the written consent of our company. Test results transmitted herein are on y applicable to the actual samples tested at the locations) referenced and are not necessarily Indicative of the properties of other apparently similar or Identical materials. Page 1 of 1 Q, W1..,,-1,. INFILTRATION SITE VISIT REQUEST Name of the Project: Location (attach a clear vicinity map SQ/UC- 11,4 r41A AIC4 (fir✓ tZ..A QA->e /w/+o/ - ' .& 64*y Let UVE Street address, SR number, community, etc. Directions from the nearest major intersection: /$},"Jn tlrk-. -I& /,? klr... Li 'F L)s dv't i7 er'Nc 210 , /Ak� GE< �- IZ14 12+-Jc X-1-/ / H,u Cf �4YF JA efl$7N'1 /A/47 Owner/Applicant Name: US n/Q� Consultant Name: ir11d4 (- e/i,ksb,,3 ,i 'U61 a"IG Consultant Contact Information: q(a-52v— Ml �, mil, ks�� (? , �v -^i #1 #2 #3 #4 #5 #6 #7 #8 Existing ground elev. @basin/trench= SHWT elev.= SHWT plus 2' (max. bottom elev.)= Date/Time of Soils Investigation : h4'� 71 6F Summary/Comments: A/t Prr)05 w rA y, S,«wF b..�i✓ q/�i All proposed infiltration areas and existing, active utility lines located within the proposed basin/trench must be marked and flagged. If these areas are not flagged, the Soils Scientist reserves the right to decline to do the investigation. If the proposed infiltration system will be located in an area of existing pavement and there is no open area nearby, equipment capable of breaking through the impervious layer must be provided. The soils investigation does not take the place of a soils report prepared by an appropriate professional. The Soils Scientist will only verify the soil conditions that are reported in the Soils Report, and make a determination as to the suitability of the site to meet the infiltration design requirements under NCAC 2H.1000, and assumes no liability should the system fail. 77. 28' 0.0 ' W 077. 27' 0.0 " w 77. 26' 0.00" W� 77. 25' O.OQ" W 10771 24' I 0.0 ` �- '7 � ' �-' „� _,, • �/ / (� `@ ` , � f it L.•1y: i Y � �J�.,. 1 ,C• I (1 l 1 I l \ 1 Jl•" [ t xn I rsf ;i � � R � r.F .f 'S,y �; c ro��)/ ✓�il? $''`d" t y [� � � 1 7 �f G t A ;" ' i.' :�/7/ -y%3/Crr ti\ ,-/ l� } r r ,I 'r �� i Y �• ��� �y"r. J � LG �r 1 077 28' 0.0'"W 077 27' 0.06- W 77 26 0.00 n77 25' 0.00" 77 24' 0.0 M V p 6 — �QPYuylu llt w:, INFILTRATION SITE VISIT REQUEST Name of the Project :_ 12[5e/6'E %iat [At �G 01 o' U=br64 MQ Location (attach a clear vicinity map): UA✓ 1z16 24-,z )2-V 64 y. L e, eL O street address, SR number, community, etc. Directions from the nearest major intersection: /$3 m,/1s IC-, -7t, us Nor /7 a'� Nc. kI Owner/Applicant Name: US Consultant Name:_ Lyra .d - el" esaLy ,F 'UC1 1,%/c- e, Consultant Contact Information: Phone, fax, email, etc. #1 #2 #3 #4 #5 #6 #7 #8 Existing ground elev. @basin/trench= SHWT elev.= SHWT plus 2' (max. bottom elev.)= Date/Time of Soils Investigation : J % db S dd Summary/Comments: All proposed infiltration areas and existing, active utility lines located within the proposed basin/trench must be marked and flagged. If these areas are not flagged, the Soils Scientist reserves the right to decline to do the investigation. If the proposed infiltration system will be located in an area of existing pavement and there is no open area nearby, equipment capable of breaking through the impervious layer must be provided. The soils investigation does not take the place of a soils report prepared by an appropriate professional. The Soils Scientist will only verify the soil conditions that are reported in the Soils Report, and make a determination as to the suitability of the site to meet the infiltration design requirements under NCAC 21-1.1000, and assumes no liability should the system fail. I 077"1 2S' o 0d w 077� 2r10.00° w 077. 26-10.00° w, 077 7' 24',0 00� W } t\ "` •{ l Z � :. � _/ \J r ) eta rF �1 �. .r ,-�`' � r •�.. ( 7" rr h k- { » l� 1\ r II i, F�j \ I r �K'1 l� pp��jj� 1 ' `1 •i '1.-: , � � i ( � rr VHF , , z o o U , bd r �. 7i 0r��l kF d I 'a.A OK cyj.' ���f% lop �1 1 O v' ♦ ✓ r _ ti Yt Y. J 71 r117 i 9- ` .i-'1 _\ /'1 ' �077 28'L—0 Ob' 077 27'I0 00" 6774 26j0.00' W 0.00 % b77 2SIV077' 24' . J. Copyrigh: (C) 1997. Mapiech, Inc. !000 9 P M 117 NO.A4 ll P. 1 (Ni /C. M ( kSUrES February 13, 20M The Benham Companies, LLC 9400 N` Broadway, Suite 300 bkl6hgrr a City; OK 73,114-7401 Attention`.- Mr. Edward kochick Subjects. Stormwater Detention, Considerations Marine:Reserve Training Center MCB Camp.Leieune, North Carolina Terracon Project No: 70055102 Dear Mr..Kochick.' Derr n Consulting. Engineers BSclentists. Terracon. Consultants„ Inc: 5240 Green's'Dairy Rua Raleigh; North Carolina 27616 Phone ,919.873'.2211 Fax 919.673.9555 wwvi.ter}accn=, n` Terracon performed field and laboratory testing to evajuate'the-soil infiltration rate for.use in designing a stormwatec detention, pond at `the proposed Marine Reserve Training Center (MRTC), to be located at. MCB Camp LeJeune, North%Carolina. We -previously, performed a subsurface :exploration for the-, 'project and .submitted the results'.in our geotecnnical engineering report dated January 24; 2006. For the additional. testing, we performed a field density'test,using the sand cone method and collected 'a sample of the on -site soil; to ,return to. our laboratory for remolded permeability. testing, The sample was'remolded in the',laboratory to near`the;field density. The .results of the permeability ,test indicate, a, hydraulic conductivity value .of 1.36z.10'3 1 cmisec. Based on the ..results.of the laboratory, testing and our experience with similar materials:,we recommend using an infiltration' rate of-1.5,,to 2 inch/hour for design of the stor mwater detention "pond. ' The results of the field density test and permeability test are attached. Additionally, we estimate a seasonal high water level for the site onthe order of,5.5: feet below: the' current ground surface. This estimate is based on the groundwater. ',Ievel, observations in our borings during the geotechnical exploration as well as the moisture and color profile of the soil. Delivering Success for.Clients and- Employees.Since 1965 More Tha`n'70 Offices NalionCvide Mahne ReserveTraining.Center MCB Carno LeJeune, No , rth Carolina Terracon Project No.r70055102 Februari, 13, 2006 We appreciate the oppcTtuhity to be of service to you on this project. If you have any questions, Golq,cemmg,ttw6 this le er or, if " may be of further service to you in anyway please doJnot hesitate to contactl,us: Sincerely, M 1r6r'*rla c on E SEAL M VVM mifthew 8..balven, P.E. Project,Engineer ! . North Carolina No. 030731 Attachments Copies to: ,Addressee (3) �rney�. - ile P.E. Principal North Carolina No. 11 286 71. N0. t PERMEABILITY TEST REPORT TEST DATA.: .SAMPLE DATA: Specimen height (crr): 10,15 Sample Iden'tificotion: BORING B-2 'Spec'imen Dicmeter (cm): 7.03 HANDAUGERSAMPLE Dry Unit Weight (Pcf): 45.6 Visual Oescriot-tan: Tau 60OWN SLIGHTLY Moisture Before, Test (X): 11.8 SILTY FINE SAND Moisture After Teet (%): 25.6 Remarks: ASTM 05084. -Run Number:: 1 •. 2 A. Cell' Pressure (psi) t 42.0 42.0 M6ximum Dry Dens:'ty (�pcf): Test Pressure(psi): 40.5 40.5. Optimum Moisture Content (%): Back Pressure(psi):, 40.0 40.0 Diff. Heoc (psi).: 0.5 C.5 Percent Compaction: F'ow Rate (Ca/sec).: 1.90. 10--1 a. m_. 10--1 Perm¢dmetar type: Flexible wol 1 Perm. (cm/sec)' 1.36y 10•-3 1.fio. l0--3_ Sample type: REMOLDED O O 4 2 d 6. R 10 l.a t0'-2 3 x 10--3 a , 10--3 4 . 10--3 2 a 10--3 1 : 10--3 TZME - -t (sec) 25 50 75 100 av�u��un 0 5 10 15 20 AVERAGE HYDRAULIC GRADIENT - dH/L (cm/cm) Project: STONE BAY ;1ARINE BASE Project No.:. 70055102 Loca'ion: CAMP LEJEUNE, NORTH CAROLINA File No.: Dote: 2/13/2006 Icb No.: Tested by: MTS� PEERMEABILITY TEST REPORT Checked by: CFB u �„� 1J L7 TITAN ATLANTIC GROUP, INC. Test: CH - Constant head FIELD DENSITY TESTING Report Number 70055102.0002 1r'errac®n Service Date: February 6, ..00G 5240 Greens Dalry Road - Ral(;igh, hC 27616 (919)873-2211 Client: Report Date: February 07, 2006 Benham Companies LLC Project: NC MRTC Project Atin: Doug Site peid Camp LeJeune 9400,N..Broad:gay Jacksonville,.NC 9400 N. Broadway OK 73114 Project No.: 7005M02 Field Test Data Probe Water Dry Unit Dry Unit Test Lift/ Mat. Depth Content 'Weight Weight No. Test Location Elev. No. (inches) (.% (pcf) (N.compaction) 1, .1 9.0 96.0_ .. 0.0 Test results on this report meet projec(specification. -Field Test MethodASTM.D-1556, AS T bt D-,1556 Report Distribution' f 1) eenham CemDanie3 LLC r Reviewed by:_� Mathew S. 9alven Professional It (Gentengr) The tests were performed in general arcomance with applicable ASTfd, AASHTO,-or DOT test methods. This report is exclusivorr for the use ofthe client indicated above and shall not be reproduced except in_fu_t without the written consentofour company. Test results transmitted herein are only applicable to the actual samples tested at the location(s) reterencedand are not necessarily indicative of the properties of other apparently similar or idemiwl materials. Page i of t eo (<_� - I �A cer z)zz -f NCDENR <J: 36 North Carolina Department of Environment and Natural Resources 127 Cardinal Drive, Wilmington NC 28405 (910) 796-7307 FAX (910) 350-2004 11)0 Request for Express Permit Review FILL-IN all information below and CHECK required Permit(s). FAX or email to Cameron. Weaver(@ncmail.net along with a narrative and vicinity map of the project location. Projects must be submitted by 9:00 A.M. of the review date, unless prior arrangements are made. APPLICANT Name Carl Baker, Director, Design Branch. Public Works Division Company US Navy Address Camp LeJeune City/State NC Zip 28547 County Onslow Phone 910-451-2213 Fax ( Email carh,h.baker@usmc.mil PROJECT NAME Reserve Trainina Facilitv & Vehicle Maintenance Facilit PROJECT SYSTEM(S) TRIBUTARY TO STONES CREEK (STREAM NAME) White Oak River BASIN ENGINEER/CONSULTANT Tim Clinkcales, PE Company Freeland-Clinkscales of NC, Inc Address 3922 Edgewood Road City/State Wilmington Zip NC County 28403 Phone (910) 520-1991 Fax (910) 251-8282 Email timclinkscales(aa)hotmail.com State or National Environmental Policy Act (SEPA, NEPA) — EA or EIS Required ❑ Yes ❑ No ❑ STREAM ORIGIN Determination; # of stream calls; Stream Name ® STORMWATER ❑ Low Density ❑ High Density -Detention Pond ❑ High Density -Other Wetlands MUST be addressed below ❑ Low Density -Curb & Gutter ® High Density -Infiltration ❑ Off Site ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ❑ COASTAL ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information MANAGEMENT ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront ® LAND QUALITY ® Erosion and Sedimentation Control Plan with 8_3 acres to be disturbed. WETLANDS (401) Wetlands on Property ❑ Yes ❑ No Isolated Wetlands on Property ❑ yes ® No Check all that apply Wetlands Will Be Impacted ❑ Yes ® No Wetland Impacts: Acres) Wetlands Delineation has been completed ® Yes ❑ No ❑ Buffers Impacted: Acre(s) USA COE Approval of Delineation completed ® Yes ❑ No 404 Application in process w/USACOE []Yes ®No 1 Permit received from USACE ❑Yes ❑No 401 Application required ❑Yes ® No If Yes, ❑ Regular ❑ Express Additional fees, not to exceed 50% of the original Express Review permit application fee, may be charged for subsequent reviews due to the insufficiency of the permit applications. SUBMITTAL DATES: Fee Split for multiple permits: SW $ CAMA LQS 401 For DENR use only $ Total Fee Amount $ Reserve Training Facility & Vehicle Maintenance Facility Express Stormwater Narrative February 6, 2006 Project Narrative: The site is 8.3 acres in size and drains to Stones Creek which is classified as SA, HQW waters. The site is presently wooded. The proposed design improvements include the construction of a Reserve Training Center building and 160 space parking lot. Local approvals have been obtained for the design concept through The US Department of the Navy. A geotechnical engineering firm has been contracted to determine the infiltration rate and seasonal high water table. Also Vincent Lewis will be contacted to conduct field investigations to establish the seasonal high water table. Based on the impervious area, it will be designed based on high density design. The stormwater will be treated through the use of infiltration devices.