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SW8080301_HISTORICAL FILE_20080429
STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 0 00?JO \ DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS © HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2UOFS oy2C) YYYYMMDD Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleco 11. Sullins Director Division of Watcr Quality April 29, 2008 Carl Baker, Deputy Public Works Officer USMCB Camp Lejeune Bldg 1005 Michael Road Camp Lejeune, NC 28547-2521 Subject: NPDES Phase II Stormwater Permit No. SW8 080301 Special Operations Training Ground (S.O.T.G.) High Density Commercial infiltration Basin Project Onslow County Dear Mr. Baker: The Wilmington Regional Office received a complete NPDES Phase II Stormwater Management Permit Application for Special Operations Training Ground (S.O.T.G) on April 24, 2008. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Session Law 2006-246 and Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 080301 dated April 29, 2008, for the construction of the subject project. This permit shall be effective from the date of issuance until April 29, 2018, 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 sixty (60) 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 contact C ristine Nelson, or me at (910) 796-7215. Sine ely, n Edward Beck Regional Supervisor Surface Water Protection Section ENB/can: S:\WQS\STORMWATER\PERMIT\080301.apr08 cc: Bryan Dick, Earth Tech Onslow County Building Inspections Christine Nelson Wilmington Regional Office Central Files matter, please NorthCarolma JVaturallil North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Wilmington Regional Office Internet: w%vN% ncwaterg qualitN or Fax (910) 350-2004 An Equal Opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper Customer Service 1-877-623-6748 State Stormwater Management Systems Permit No. SW8 080301 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY NPDES PHASE II 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 Carl Baker & USMCB Camp Lejeune Special Operations Training Ground (S.0.T.G.) Dr. G. W. Garner St., Camp Lejeune, Onslow County FOR THE construction, operation and maintenance of seven infiltration basin(s) in compliance with the provisions of Session Law 2006-246 and 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 April 29, 2018, 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 1.8 on page 3 of this permit. The seven stormwater controls have been designed to handle the runoff from a total of 82,871 square feet of impervious area. Infiltration basins 1A, 1 B, 2, 3, 4, 5, and 6 have been designed to handle 12,447, 1,670, 4,220, 12,933, 20,552, 18,855, and 12,194 square feet of impervious area, respectively 3. These basins must be operated with a 50' vegetated filter. 4. The tract will be limited to the amount of built -upon area indicated in Section 1.8 on page 3 of this permit, and as shown on the approved plans. 5. 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 8 State Stormwater Management Systems ' Permit No. SW8 080301 6. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 7. The built -upon areas associated with this project shall be located at least 30 feet landward of all perennial and intermittent surface waters. The following design criteria have been permitted for the infiltration basins and must be provided and maintained at design condition: Infiltration Infiltration Infiltration Infiltration Infiltration Infiltration Infiltration Design Criteria Basin #1A Basin #113 Basin #2 Basin #3 Basin #4 Basin #5 Basin #6 a. Drainage Area: acres 0.42 0.10 0.10 0.66 0.47 0.63 0.36 -Onsite, ft2: 18,455 4,470 4,220 28,740 20,552 27,327 15,472 -Offsite,ft2: None None None None None None None b.Total Impervious Surfaces, ft2: 12,447 1.670 4,220 12,933 20,552 18,855 12,194 -Buildings, ft2: 1,311 870 4,220 3,450 0 18,855 0 -Parking/Streets, ft2: 11,136 800 0 0 20,552 0 12,194 -Sidewalks/Concrete, ft2: 0 0 0 9,483 0 0 0 c. Design Storm, in. 3.68 3.68 3.68 3.68 3.68 3.68 3.68 d. Difference in the pre- and post - development 1-yr, 24-hr runoff, ft': 3,454 463 1,171 3,613 5,703 5,233 3,383 -Pre-developmentt-yr,24-hr 285 69 65 443 317 421 239 runoff, ft3: -Post-development 1-yr, 24-hr 3,739 532 1,236 4,056 6,020 5,654 3,622 runoff, ft3: e. Basin Depth, ft: 1.20 0.90 1.10 1.42 1.42 1.50 1.6 f. Bottom Elev., FMSL: 28.10 28.10 26.10 26.58 26.58 25.00 20.90 Bottom Surface Area, ft : 4,556 664 1,102 3,173 5,150 3,503 2,435 h. Bypass Weir Elevation, FMSL: 28.80 28.80 27.00 27.58 27.58 26.30 22.10 i. Permitted Storage Volume, ft : 3,458 465 1,177 3,624 5,714 5,252 3,400 j. Pre -development 1-yr 24-hr discharge, ft3/s: 0.01 0.01 0.01 0.05 0.05 0.01 0.01 k. Type of Soil: Ba meade Marvyn Mervyn Ba meade Ba meade Ba meade Ba meade I. Expected Infiltration Rate, in/hr: 3.94 5.91 7.09 5.91 5.91 6.69 2.61 m.Seasonal High Water Table, 26.08 26.10 24.08 24.10 24.10 23.00 18.80 FMSL: n. Draw Down Time, hrs: 2.3 1.7 1.8 2.3 2.3 2.7 6.4 o. Receiving Stream / River Basin: New River / White Oak p. Stream Index Number: 19-(27) 19-31 q. Water Body Classification: „SA„ "SC" - within Y2 mi of and draining to SR / SA waters 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. Page 3 of 8 State Stormwater Management Systems Permit No. SW8 080301 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 for each permitted BMP. The reports will indicate the date, activity, name of person performing the work and what actions were taken. 5. The permittee shall submit to the Division of Water Quality an annual summary report of the maintenance and inspection records for each BMP. The report shall summarize the inspection dates, results of the inspections, and the maintenance work performed at each inspection. 6. 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. 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. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification ustbe 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 maybe required for those deviations. 9. Access to the stormwater facilities shall be maintained via appropriate easements at all times. Page 4 of 8 State Stormwater Management Systems Permit No. SW8 080301- 10. 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. 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 12. 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. 13. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable to any person or entity 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 completed Name/Ownership Change form to the Division of Water Quality, signed by both parties, and accompanied by the appropriate documentation as listed on page 2 of the form. 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. 3. 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. 4. 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. 5. 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. 6. 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. Page 5 of 8 State Storrnwater Management Systems Permit No. SW8 080301 The permit issued shall continue in force and effect until revoked or terminated. 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. Unless specified elsewhere, permanent seeding requirements for the stormwater controls must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 10. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules and regulations contained in Session Law 2006- 246, Title 15A NCAC 21-1.1000, and NCGS 143-215.1 et. al. 11. The permittee shall notify the Division in writing of any name, ownership or mailing address changes at least 30 days prior to making such changes. Permit issued this the 29`h day of April 2008. LINA ENVIRONMENTAL MANAGEMENT COMMISSION Jor uoieen ri. ounms, uirecior Division of Water Quality By Authority of the Environmental Management Commission Page 6 of 8 State Stormwater Management Systems Permit No. SW8 080301 Camp Lejeune - Special Operations Training Ground (S.O.T.G.) Stormwater Permit No. SW8 080301 Onslow County Designer's Certification 1, , 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 7 of 8 State Stormwater Management Systems Permit No. SW8 080301 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 Onslow County Building Inspections DWQ USE ONLY Date Received Fee Paid Permit Number J 3—/1?-4 r 1000. 3s2Fr S OdD o / 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. Applicants name (specify the name of the corporation, individual, etc. who owns the project): 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Carl Baker, Deputy Public Works Officer 3. Mailing Address for person listed in item 2 above: Bldg 1005 Michael Rd. City: MCB Camp Lejeune State:NC Zip:28547-2521 Phone: (910 ) 451-2213 Fax: Email: carl.h.bakerOusmc.mil 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): USMCB Camp Lejeune - S.O.T.G. 5. Location of Project (street address): Camp Lejeune, Stone Bay, Dr. G. W. Garner St. City:Camp Lejeune County:Onslow 6. Directions to project (from nearest major intersection): From Jacksonville, take US 17-S, turn left onto NC 210, turn left on to rifle range road, turn right onto Booker T. Washington Rd. Site is to the east of the parking area. 7. Latitude: 34-35-19 N Longitude: 77-26-35 W of project 8. Contact person who can answer questions about the project: Name:Brvan Dick Telephone Number: (919-854-6252 ) Email:brvan.dick@e-,irthtech.com II. PERMIT INFORMATION: 1. Specify whether project is (check one) ❑Renewal ❑Modification Form SWU-101 Version 8.07 Page 1 of 4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit numberNA and its issue date (if known) 3. Specify the type of project (check one): ❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks): ❑CAMA Major ❑Sedimentation/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. Ill. 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. Stormwater will be routed via grassed swales from imperivous areas to 7 separate basins. Each infiltration basin meets DWO requirments for drawdown time and is sized for the required treatment volume This project is withing 1 /2 mile of SA (SC) waters 2. Stormwater runoff from this project drains to the White Oak River basin. 3. Total Site Area: 18.1 acres 4. Total Wetlands A 5. 100' Wide Strip of Wetland Area: NA acres (not applicable if no wetlands exist on site) 6. Total Project Area**:4.39 acres 7. Project Built Upon Area:.77.7 '%, 8. How many drainage areas does the project have? 7 9. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basin Information Drainage Area 1 A Drainage AreaX 113 Receiving Stream Name New River New River Stream Class & Index No. SA �G - SA Drainage Area (sf) 18455 4470 Existing Impervious* Area (sf) 1,311 870 Proposed Impervious*Area (sf) 11,136 800 % Impervious* Area (total) 67% 37OX, Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (sf) 1,311 870 On -site Streets (sf) 0 0 On -site Parking (sf) 11,136 800 On -site Sidewalks (sf) 0 0 Other on -site (sf) 0 0 Off -site (sf) 0 0 Total (sf): 12,447 1670 Form SWU-101 Version 8.07 Page 2 of 4 Basin Information Drainage Area 2 Drainage Area 3 Drainage Area 4 Drainage Area 5 Drainage Area 6 Receiving Stream Name New River New River New River New River New River Stream Class SA lq- �, SA Iq.31 SA t9.31 SA 19-31 SA Drainage Area (sf) 4, 220 28,740 20,552 27,327 15,472 Existing Imp. Area (sf) 0 2,950 0 7,700 0 Proposed Imp Area (sf) 4,220 9,983 20,552 11,155 12,194 Imp Total 100° 45 % 100% 69 % 79 Imp Surface Area On -Site Buildings (sf)/4,220 ,220 3,450 0 18,855 0 On -site Streets (sf) K 0 0 0 0 On -Site Parking (sf) 0 0 20,552 0 12,194 On -Site Sidewalks (sf)0 0 0 0 0 Other On -site (sf) 0 9,483 (concrete pads) 0 0 0 Off -site (sf) 0 0 0 0 0 Total 1 12,933 1 20,552 1 18,855 1 12,194 Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. **Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. 10. How was the off -site impervious area listed above IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the 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. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions- with Curb Outlets By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required in the above form, 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) 7335083 for the status and availability of these forms. Form SW401-Low Density Form SW401-Curb Outlet Svstem Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-Infiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cell Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401-Sand Filter Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bioretention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement Sand Filter Supplement Form SWU-101 Version 8.07 Page 3 of 4 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 Office. (Appropriate office may be found by locating project on the interactive online map at htto://h2o.enr.state.ne.us/sa/msi maps.htm) 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 • Original and one copy of the Deed Restrictions & Protective Covenants Form • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP • Permit application processing fee of $505 (54,000 for Express) payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management • Copy of any applicable soil report • Three copies of plans and specifications (sealed, signed & dated), including: - Development/Project name - Engineer and firm - Legend - North arrow - Scale Initials 13m.0 - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - 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) VII. 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): Bryan Dick, PH, Earth Tech Mailing Address: 701 Corporate Ctr. Dr., Suite 475 City:Raleigh State:NC Zip:27607 Phone: (919 ) 854-6252 Email:bryan.dick@earthtech.com VIII. APPLICANT'S CERTIFICATION Fax: (919 1 854-6259 I, (print or type name ofperson listed in General Information, item 2) � aI- I CL _ certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project wi e constructed in conformance with the approved plans, that the required deed restrictions and protective ven nts will b r corde , and that the proposed project complies with the requirements of 15A NCAC 2H .10 Signature: Date: Form SWU-101 Version 8.07 Page 4 of 4 ors' iwcA S�rsnhJ' 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 Office. (Appropriate office may be found by locating project on the interactive online map at http://h2o.enr.state.nC.us/su/InSi maps.htin 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 Storrawater Management Permit Application Form • Original and one copy of the Deed Restrictions & Protective Covenants Form • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP • Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management • Copy of any applicable soil report • Three copies of plans and specifications (sealed, signed & dated), including: - Development/Project name 2 - 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 - 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) VII. 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): Bryan Dick, PH Earth Tech Mailing Address: 701 Corporate Ctr. Dr., Suite 475 Phone: (9919 ) 854-6252 Email:bryan.d ick©earthtech.com State:NC Zip:27607 Fax: (919 ) 854-6259 VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) �Lf ate j certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project wi e constructed in conformance with the approved plans, that the required deed restrictions and protective 96venpnts will b r corde , and that the proposed project complies with the requirements of 15A NCAC 2H .10 Signature: Date: Form SWU-101 Version 8.07 Page 4 of 4 5e ion V1- j ,,\*;atQ Permit No. �,\,J` MQJI (to be provided by DWO) ode w A rpgoG 724 STORMWATER MANAGEMENT PERMIT APPLICATION FORM NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION Project Name USMC6 Camp Lejeune - S.O.T.G. Contact Person Bryan M. Dick, PH Phone Number 919-854-6252 Date 4/18/2008 Drainage Area Number 6 II. DESIGN INFORMATION Site Characteristics Drainage area 15,477J00 ftz Impervious area 12,194(00 fe Percent impervious 0.79 Design rainfall depth 3.7 in Peak Flow Calculations Is pre/post control of the 1-yr 24-hr peak flow required? Y (Y or N) 1-yr, 24-hr runoff depth 3.7 in 1-yr,24-hr intensity 0.9 in/hr Pre -development 1-yr, 24-hr runoff volume 0.01 ft3/sec Post -development 1-yr, 24-hr runoff volume 0.09 ft3/sec Pre/Post 1-yr, 24-hr peak flow control 0.1 ft3/sec Storage Volume: Non -SR Waters Minimum design volume required ft3 Design volume provided ft3 Storage Volume: SR Waters 1-yr, 24-hr rainfall depth 3.7 in Pre -development 1-yr, 24-hr runoff 239 ft3 Post -development 1-yr, 24-hr runoff 3622 ft3 Minimum volume required 3383 ft3 Volume provided 3,400 ft3 Soils Report Summary Soil type Baymeade Infiltration rate 2.61 in/hr SHWT elevation 18.80 fmsl Basin Design Parameters Drawdown time 0.27 days OK Basin side slopes 4 :1 OK Basin bottom elevation 20.90 fmsl OK Storage elevation 22A0 fmsl Top elevation 22.50 fmsl Basin Bottom Dimensions Basin length 67 it Basin width 36 ft Bottom SA 2,435 fe Form SW401-Infiltration Basin-Rev.1 Parts I. & I. Design Summary, Page 1 of 2 Permit No. MM �3�) (to be provided by DWO) 16 Additional Information 1DA Total runoff volume captured by basin 0.93 ac-in OK Length of vegetative filter for overflow 50 ft OK Distance to structure 122 ft OK Distance from surface waters 80 ft OK Distance from water supply well(s) NA It OK Separation from impervious soil layer NA ft OK Naturally occuring soil above shwt 1.7 ft OK Bottom covered with 4-in of clean sand? N (Y or N) OK Recorded drainage easement provided? NA (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Bypass provided for larger storms? Y (Y or N) OK Pretreatment device provided Y Form SW401-Infiltration Basin-Rev.1 Parts I. & II. Design Summary, Page 2 of 2 Permit No. cJ W7-o6 V Jot (to be provided by DWQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan iit' Is Sheet No. nN/ 1- G 21G TM 1. Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Recorded drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. C 3 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing: Bypass structure, Maintenance access, Basin bottom dimensions, Basin cross-section with benchmark for sediment cleanout, Flow distribution detail for inflow, Vegetated filter, and Pretreatment device. e q 3. Section view of the infiltration basin (1" = 20' or larger) showing: Pretreatment and treatment areas, and Inlet and outlet structures. C!_ 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. AA/tBM1115 6. An assurance that the installed system will meet design specifications upon initial operation once the project is complete and the entire drainage area is stabilized. C_ c 7. A construction sequence that shows how the infitlration basin will be protected from sediment until the entire drainage area is stabilized. IitlE, 8. The supporting calculations. MA F 9. A copy of the signed and notarized inspection and maintenance (AM) agreement. IAA' 10. A copy of the deed restriction. Form SW401-Infiltration Basin-Rev.1 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1 EarthTech A Tyco Intemalional Ud, Company .GL 127 U$ Earth Tech of North Carolina Bryan M. Dick, EIT, PH 701 Corporate Center Dr. Suite 475 Raleigh, NC 27607 919-854-6252 NC DWO - Express Stormwater Permitting Attn: Christine Nelson 127 Cardinal Dr. Ext. Wilmington, NC 28405 701 Corporate Center Drive P 919.854.6252 Suite 475 F 919.854.6259 Raleigh, NC 27607 earthtech.com AAIV '-To Checl< APR 2,4 2008 Re: USMC — SOTG Express Stormwater Permit Application SW8 080301 — Response to RFI dated 4/11 /08. Mrs. Nelson, Please find enclosed the check that was left out of the submittal packet. Thanks for bringing it to my attention. Sincerely, Bryan M. Dick. EIT, PH Project Manager CC: Mr. David Towler, EIT USMCB Lejeune Public Works � EarthTeeh 70ate Center Drive 919.854.625 Suiteite475 475 F 919.854.6259 Raleigh, NC 27607 earthtech.com A Tyco International Ltd. Company April 18, 2008 Earth Tech of North Carolina Bryan M. Dick, EIT, PH 701 Corporate Center Dr. Suite 475 Raleigh, NC 27607 919-854-6252 NC DWO - Express Stormwater Permitting Attn: Christine Nelson 127 Cardinal Dr. Ext. Wilmington, NC 28405 APR � 1 2008 Re: USMC — SOTG Express Stormwater Permit Application SW8 080301 — Response to RFI dated 4/11 /08. Mrs. Nelson, Please find enclosed the changes to the application per the comments in your RFI referenced above. Our response to the itemized comments are as follows: 1) Basin #6 has been amended to coincide with the appropriate K value for ET 7 in the amended soils report. We did not label any of the basins on the design drawing "Basin 7" but I assumed that you mean the basin that would correspond with Basin 7 as titled on the infiltration request form. I believe that this is a correct assumption due to the fact that the K value in the supplement form of Basin 6 deviated from the corresponding value from the soils report (ET 7). 1 used the more conservative of the 2 values reported by Catena in the report, using 2.61 in/hr aerial infiltration rate rather than the geometric mean value. 2) The following chart is updated to reflect that one of the soil boring locations, ET5, was not used. When Mr. Lewis performed the site visit, he suggested that the proposed Basin at ET5, Design Basin # 4, be moved to sit beside Design Basin #3 in order to utilize the more suitable location for both basins. This was discussed in the initial review meeting. The chart has been corrected to indicate that Design Basin #4 correlates to ET3 and Soil Investigation Request Label 4. Both of these basins are at the same approximate ground elevation and approximate SHWT due to the homogeneity of the locale and the observations made by Mr. Lewis while on the site. Mr. Lewis indicated that another boring would not be necessary. The design takes advantage of higher infiltration rates while using a more conservative SHWT due to the shallower SHWT at ET3 vs. ET5. This was viewed as a conservative approach rather than removing the hardpan at ET5 and placing Desi n Basin #4 in a location of a hardpan. Cross Reference Table for Basin # to Soil Test Location # Design Basin # Catena Soil Bore Soil Investigation Request Label 1A ET4 1 1B ET2 2 2 ET1 3 3 ET3 4 Not Used ET5 5 EarthTech A Tyco International Ltd. Company 4 ET3 4 5 ET6 6 6 ET7 7 'Note: Soil Bore locations are shown on plan sheets. 3) The volume reported on the Supplement form for Basin I A is a typo and has been corrected to match the calculations, which were deemed to be correct. 4) Comment has been addressed. 5) Print settings were cutting off the calculations. It has been adjusted and another copy of the calculations is included. 6) A 1000.00 check is enclosed. I hope that this clears up everything for you, especially with the confusion of the two basins at the one soil boring location. I am sure that Mr. Lewis can verify that it was his suggestion that we are following and that they are located to provide a more environmentally sensitive design. I look forward to hearing from you with regard to the application. Sincerely, Bryan M. Dick, EIT, PH Project Manager CC: Mr. David Towler, EIT USMCB Lejeune Public Works Michael P. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins Director Division of Water Quality April 11, 2008 Carl Baker, Deputy Public Works Officer USMCB Camp Lejeune Bldg 1005 Michael Rd. MCB Camp Lejeune, NC 28547-2521 Subject: Request for Additional Information Stormwater Project No. SW8 080301 USMCB Camp Lejeune - S.O.T.G. Onslow County Dear Mr. Baker: The Wilmington Regional Office received an NPDES Phase II Post Construction Permit Application for USMCB Camp Lejeune - S.O.T.G. on March 12, 2008. A preliminary review of that information has determined that the following information is needed to continue the stormwater review: 1. The infiltration rate presented in the supplement for infiltration basin 7 does not correspond with the infiltration rate identified in the soil report. Please report the infiltration rates consistently or explain the reason for the difference. 2. The provided cross reference table for the various basin and boring numbers shows that infiltration basins 3 and 4 were designed based on the infiltration rate of soil boring ET3. However, infiltration basins 3 and 4 are associated with 2 different samples (numbers 4 and 5) from the samples taken by Vincent Lewis. Why are these two infiltration basins not based on the same soil test as shown with the Catena Soil Bore (ET3)? It appears that the SHWT presented on the supplements for these two infiltration basins assume the same boring and SHWT. Also, the cross reference table indicates that infiltration basin 3 is associated with boring 4 from Vincent Lewis's field visit. However, the supplement for infiltration basin 3 appears to use a different SHWT than boring 4. Please verify the information is presented consistently. 3. On the supplement for infiltration basin 1 A, the provided storage volume is reported to be 5,458 cubic feet; however, the calculations report the storage volume at the design elevation as 3,458 cubic feet. Is this a typo? 4. The drawdown time identified on the infiltration basin supplements should be consistent with the actual drawdown of the infiltration basins as shown in the calculations. For example, the supplement for Infiltration basin 1A reports the drawdown rate to be 2 days, however the calculations report the drawdown rate to be 0.1 day. The drawdown calculation associated with infiltration basin 2 was not included with the calculations. Please provide the drawdown calculations for this infiltration system. North Carolina Division of Water Quality 127 Cardinal Drive 13xtenston Wilmington, NC 28405 Phone (910) 796-7215 Wilmington Regional Office Internet: www.newatergualitv.ore Fax (910) 350-2004 0,,, NorthCarolina A4turally Customer Service 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycled110 % Post Consumer Paper Carl Baker April 11, 2008 Stormwater Application No. SW8 080301 Please submit a $1,000 fee for the additional review required for this application. Please keep in mind that changing one number may change other numbers and require the calculations, supplements, plans, and other supporting documentation to be updated. Verify all numbers are correct.to ensure consistency in the application documents. Please note that this request for additional information is in response to a preliminary review. The requested information should be received in this Office prior to April 21, 2008, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. 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. If you have any questions concerning this matter please feel free to call me at (910) 796-7323 or email me at christine.nelson@ncmail.net. Sincerely, Christine Nelson Environmental Engineer ENB/can: S:\WQS\STORMWATERWDDINFO\2008\080301.apr08 cc: Bryan Dick, Earth Tech Christine Nelson Wilmington Regional Office Page 2 of 2 2nd request for additional information: Stormwater Project No. SW8... Subject: 2nd request for additional information: Stormwater Project No. SW8 080301 - SOTG From: Christine Nelson <Christine.Nelson@ncmail.net> Date: Fri, 11 Apr 2008 10:31:53 -0400 To: carl.h.baker@usmc,mil, bryan.dick@earthtech.com, neil.dean@earthtech.com, david.towler@usmc.mil CC: Janet Russell <Janet.Russell@ncmail.net> Gentlemen, I have attached a pdf version of my second request for additional information for Stormwater Project SW8 080301 - Camp Lejeune - S.O.T.G. I will also send copies via mail. Also, when resubmitting the additional information, you don't have to resubmit the entire package. If it helps, you can just send the pages that have changed. Thank you! Christine Express Stormwater Permitting NC-DENR Content -Type: application/pdf SW8080301 - Camp Lejeune SOTG 042008.p7 Content -Encoding: base64 1 of 1 4/11/2008 10:32 AM EarthTech A Iyno International Ltd, Company April 4, 2008 Earth Tech of North Carolina Bryan M. Dick, EIT, PH 701 Corporate Center Dr. Suite 475 Raleigh, NC 27607 919-854-6252 INC DWQ - Express Stormwater Permitting Attn: Christine Nelson 127 Cardinal Dr. Ext. Wilmington, NC 28405 701 Corporate Center Drive P 919.854.6252 Suite 475 F 919.854.6259 Raleigh, INC 27607 earthtech.com Re: IJSMC — SOTG Express Stormwater Permit Application SW8 080301 Mrs. Nelson, Please find enclosed the check list for the Supplement forms that are a part of the Submitted stormwater management plan for SW8 080301. The completed check list were not included in the submittal. I included a complete copy with these additional forms in the document and a loose original of each for addition the original of the management plan document. My apologies for any inconvenience that this may cause you.... I look forward to hearing from you with regard to the application. Sincerely, Bryan M. Dick, EIT, PH Project Manager nE C E I V ED ���u�,�{pp► APR 0 7 2008 DWQ PROJ # EarthTech A Lyn International Ltd. Company April 3, 2008 Earth Tech of North Carolina Bryan M. Dick, EIT, PH 701 Corporate Center Dr. Suite 475 Raleigh, NC 27607 919-854-6252 701 Corporate Center Drive P 919.854.6252 Suite 475 F 919.854.6259 Raleigh, NC 27607 earthtech.com APR 0 4 2008 NC DWQ - Express Stormwater Permitting Attn: Christine Nelson 127 Cardinal Dr. Ext. Wilmington, NC 28405 Re: USMC — SOTG Express Stormwater Permit Application SW8 080301 Mrs. Nelson. Per your request for information. please find enclosed an updated design that reflects changes to basin dimensions and the accompanyin, updated application and Supplement forms. Specifically, your comments were addressed in the following matter. The outline helow correlates to the outline of your letter (fated March IS, 2008. I.) Checklist is included for each basin supplement, and the level spreader/filter strip supplement. it. it: The soils report amendment indicates the SHWT. b. Basin #6 has it separate amendment that is included as added to the soils report. c. See the cross reference chart for Basin and soil boring cross reference. This should clarify each basins relationship to the soils report. d. Updated design calculations use the appropriate boring location e. Desi.-n calculations are based on Vincent Lewis' determination of SHWT and included in the this document 2.) Soils reports have heen amended a. a: The soils report amendment indicates the SI-IWT. b. Basin #6 has it Separate amendment that iS included as added to the soils report. c. See the cross reference chart for Basin and soil horing cross reference. This should clarify each basins relationship to the soils report. J. Updated design calculations use the appropriate boring location e. Design calculations are based on Vincent Lewis' determination of SHWT and included in the this document 3.) Calculation spreadsheet has been corrected 4.) Pre -development nmoff calculations were found to be incorrect due to a spreadsheet data envy error, each calculation has heen corrected and verified. 5.) The spreadsheet calculation has heen amended to rellect drawdown time for the design volume based on exfiltration into the soil at rates that correspond to the infiltration rate (actually Ksat) for each site, from the soils investigation. Additionally, the. TR-55 based Hydrocad model results that were used to insure that the Phase 11 requirements were met have marked with a call -out that indicates the actual drawdown time with routing and soil conditions considered for the 1 yr storm. EarthTech A Tyco Intemm,onal Ltd. Company 6.) Minimum sw face area calculations now reflect each K value for the corresponding soil test location. 7.) A table in the calculations has been added to indicate the SA at the bouom and at the storage elevations. Hydrocad tables are included to demonstrate the stage -storage capacities for each basin. Bottom elevations in the Hydrocad model arc now identical to the supplement form and calculations. as pore space is not considered for storage, as it was previously. 8-) Filter strip supplements are provided 9.) Comment is addressed I0.)Filter snip area are defined I I .)The filter strip has been modified and relocated 12.)Spot elevation have been added 13.)Conunent is addressed 14.)Though many of these values have changed for the re -design, in all cases, the bypass outlet being below the storage elevation does not affect basin storage due the being hydraulically controlled by the weir. However, if the bypass outlet were above the weir, it would "control` and not the weir. The current plans call for weir elevations that are equal to the storage elevation fit sets the storage clevation) for each basin. The detail that was previously used was unclear and the associated table was also unclear. Changes have heen made to the detail and the table of elevations I'm the flow splitter that should help to clarify each clevation. 15.)Commax is addressed I6.)A 1000.00 check is enclosed 17.)I-evel spreaders were added to each basin and included on the supplement form for each hasin. Basin IA and 113 utilize the same level spreader clue to the down -slope position of Basin IA to the outfall of Basin IB. Total area for the conirihuting DA for level spreader IA/IB accounts for the total drainage area, including offsite area not associated with either basin's capacity. Please give me it call if you have any questions. Sincerely, z Bryan M. Dick, FIT, 131-1 Project Manager Re: USMC SOTG Express Permit SWO80301 Subject: Re: USMC SOTG Express Permit SWO80301 From: Christine Nelson <Christine.Nelson@ncmail.net> Date: Tue, 01 Apr 2008 15:34:15 -0400 To: "Dick, Bryan' <Bryan.Dick@earthtech.com> CC: Janet Russell <Janet.Russel l@ncmail.net> Bryan, A new date of April 4 for returning the requested additional information is fine with me. Christine Dick, Bryan wrote: I received the soils report a few hours ago and we are still compiling everything. Since the program allows it, I believe that having this document to you at some date later than tomorrow would be beneficial by providing ample time for an adequate CC. In the end, this should save us all time.... I was going to have to drive to the Base to get additional signed documents (one DA has now been divided, so it adds another M&O agreement that must be signed.) David can mail it to me tomorrow and I can fedex the entire application as soon as it arrives on Wed or Thursday. So, it looks like Friday, April 4 would allow us enough time for the mail transactions. The application itself will be ready tomorrow and that will allow time for CC. So, if that is agreeable, I would like to extend the deadline until COB on April 4. Please let me know if this is OK. Thanks again Bryan Bryan M. Dick, PH Project Manager EARTH TECH, INC. 701 Corporate Center Drive, Suite 475 Raleigh, NC 27607-5074 Phone: (919) 854-6252 864-506-1465 (cell) Fax: (919) 854-6259 From: Christine Nelson[mailto:Christine.Nelson@ncmail.net] Sent: Monday, March 31, 2008 4:31 PM To: Dick, Bryan Cc: Janet Russell Subject: Re: USMC SOTG Express Permit SWO80301 Bryan, Within the express program you are allowed up to 2 5-day extensions. Christine Dick, Bryan wrote: Ok. Well, I will design for the peak flow for the 10 yr storm. Bypassing the bypass flow seems to be getting redundant. That would mean 2 bypasses for each infiltration basin..... I will just design for the 10 yr, but it looks like the spreadsheet it still requiring it. Maybe it will not have tell me to bypass with the new spreadsheet that you just sent. Thanks for sending that so quickly. Since I still have received my soils update, I may miss the deadline and have to start this permit application all over. Just a heads up that we may end up starting all over.... I of 3 4/2/2008 2:49 PM Re:,USMC SOTG Express Permit SWO80301 Thanks in advance. I hope to be able to hand deliver the document tomorrow.. bryan Bryan M. Dick, PH Project Manager EARTH TECH, INC. 701 Corporate Center Drive, Suite 475 Raleigh, NC 27607-5074 Phone: (919) 854-6252 864-506-1465 (cell) Fax (919) 854-6259 From: Christine Nelson[mailto:Christine.Nelson@ncmail.net] Sent: Monday, March 31, 2008 11:17 AM To: Dick, Bryan Subject: Re: USMC SOTG Express Permit SW080301 Bryan, I checked out the level spreader supplement on the website (since the attachment was left oft). And I came up the same problem. I have e-mailed the people in Raleigh who are responsible for those forms so hopefully they will fix it in the near future. But for now, I would prefer if you could fill out the supplement electronically as much as possible and just write in the fields that can't be filled out. As for your second question, I can't look at the numbers so I'm not sure how you are tilling out the supplement fonn. What kind of flows are going to your level spreader? What storm event are you using to design your level spreaders? If you are designing based on the peak flow from the 10-yr storm, then a bypass is not required (Section 8.3.1) Christine Dick, Bryan wrote: Hi Christine. I am trying to wrap up this application for re -submittal and have run into a problem with a DWQ supplement form. I have attached the supplement form, as downloaded yesterday from the DWQ website. I noticed this last week and called over to the main division, they said they were having server issues and that it may be related. On the level spreader supplement form, the Rainfall Intensity cell (1332) is locked. This is colored as a user input cell, yet, I am unable to put in any values to let the spreadsheet calculate the peak flow from the 10 yr storm (1333). So far I have just printed off the sheet and manually written the values and made the calculation manually. Wil this be ok? I have attached one of the sheets for you to try it.. Second question about the Level Spreader supplement: The spreadsheet is indicating that I need a bypass device for the level spreader that I am using to treat the flow from our bypass devices. This is confusing and does not seem to be correct. (cell 860) We have added a level spreader for each filter strip, but the spreadsheet is directing me to add a bypass for our bypass flow?? Please let me know your take on this. You can see what I am talking about in the attached spread sheet. It may just be something I am missing.... Thanks in advance Bryan Bryan M. Dick, PH Project Manager 2 of 3 4/2/2008 2:49 PM Re: JJSMC SOTG Express Perniit SW080301 EARTH TECH, INC. 701 Corporate Center Drive, Suite 475 Raleigh, NC 27607-5074 Phone: (919) 854-6252 864-506-1465 (cell) Fax :(919)854-6259 3 of 3 4/2/2008 2:49 PM W ATER March 18, 2008 Carl Baker, Deputy Public Works Officer USMCB Camp Lejeune Bldg 1005 Michael Rd. MCB Camp Lejeune, NC 28547-2521 Subject: Request for Additional Information Stormwater Project No. SW8 080301 USMCB Camp Lejeune - S.O.T.G. Onslow County Dear Mr. Baker: Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins Director Division of Water Quality The Wilmington Regional Office received an NPDES Phase II Post Construction Permit Application for USMCB Camp Lejeune - S.O.T.G. on March 12, 2008. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: Provide page 3, Section III - Required Items Checklist, of the infiltration basin supplement for each infiltration basin. 2. Questions regarding the soils report: a. The soils report included in the application does not present the seasonal high water table (SHWT) at the locations of the borings or infiltration basins. Provide a soils report that includes the estimated SHWT at each proposed infiltration basin location. b. The soils report does not include the information for the proposed location of infiltration basin #6. Provide a soils report documenting the SHWT, soil type, and infiltration rate for infiltration basin #6. c. Does boring number 7 (as identified on the infiltration system site visit request form) correspond with the location of infiltration basin #6? Where is boring - --- number 7 located? d. The infiltration rates for the individual basins presented in the supplements are inconsistent with the information in the soils report. The infiltration rates presented in the supplements appear to directly correlated with the boring number and infiltration basin number. However, according to the soil boring map and the plans, the infiltration basin number and boring number are not associated with each other. For instance, infiltration basin #1 appears to correspond with boring ET4 not ET1, as inferred from the supplement. e. It appears that the SHWT is reported inconsistently between the information presented on the infiltration system site visit request form, Vincent Lewis's findings, and the supplements. The elevation of the SHWT used for the design of the infiltration system should be based on Vincent Lewis' SHWT determination. No"thcarohna Aiturn//y North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www ncwaterquality.orFax (910) 350-2004 1-877-623-6748 An Equal OpportunitylAtfrmative Action Employer— 50%Recycled110% Post Consumer Paper Carl Baker March 18, 2008 Stormwater Application No. SW8 080301 3. The calculations for Infiltration Basin #1 indicate that there is 0% impervious proposed on the site, when the supplement and application indicates that 56% impervious is proposed. This appears to be causing the runoff volume calculations to be off. The calculations show that infiltration basin #1 has a lower post -development volume (417 ft) than the pre -development volume (730 ft). The supplement presents the post -development volume as 4,594 ft3. 4. Verify the calculations used to determine the minimum required storage volume for each infiltration basin. The pre -development runoff volume from each drainage area is greater than anticipated, resulting in undersized infiltration basins. The general equations for determining the runoff volume to be treated by the infiltration basins presented in Step 1 of the calculations appear to be correct. Please provide more detailed calculations for how the pre - development and post -development runoff volume and minimum required storage volume were determined. 5. Provide calculations for the drawdown time of each infiltration basin. The calculations to determine the minimum surface area for each infiltration basin refer to the calculated average infiltration rate for the entire site. Use the infiltration rate specific to each infiltration basin for determining the drawdown rate and other related calculations. Provide a table in the calculations with the elevations, surface areas, and incremental and accumulated volumes at the bottom elevation, storage/overflow elevation, and top elevation for each infiltration basin to demonstrate that the minimum required volume has been provided. In addition, the HydroCAD analysis appears to report the bottom elevations of the infiltration basins inconsistently with the supplement. Report all data accurately and consistently. 8. Provide a filter strip supplement and associated calculations for each proposed filter strip. Please ensure that Section III — Required Items Checklist is included with the supplement. 9. The plans indicate that the vegetated filter strips are 50 ft wide, however, the infiltration supplements indicate that they are 30 ft wide. Please report accurately and consistently. 10. befine the filter strip area (length and width) and include the filter strips within the project area. Also, please re-evaluate the placement of the filter strip for infiltration basin #5. The length of the filter strip should be level and at virtually a zero percent grade ensuring uniform, dispersed flow (i.e. parallel with the contours). 11. According to the plans, a portion of the 50' vegetated filter strip for infiltration basin #2 includes an existing gravel road. Provide a filter strip with 50' of vegetation and no impervious area. 12. Provide additional spot elevations within drainage area 5 to show that the stormwater runoff will enter the proposed infiltration system. Page 2 of 3 Carl Baker March 18, 2008 Stormwater Application No. SW8 080301 13. The infiltration basin table on page C-4 of the plans report the bottom length and width of infiltration basin #6 as 70 ft by 30 ft, while the supplement and calculation report the infiltration basin to be 64 ft by 30 ft. Report all data accurately and consistently. 14. Demonstrate how the minimum required storage volume will be stored in infiltration basins #1, 2, 5, and 6 if the bypass outlets to the basin and the bypass weirs are set below the storage elevations. Provide elevations for the bypass bottom, overflow outlet, and top. 15. Provide calculations that are sealed, signed, and dated. 16. Please submit a $1,000 fee for the additional review required for this application. The following comment was not considered in the assignment of the Additional Information Fee as they are a clarification to a discussion held in the submittal/scoping meeting. 17. Contrary to the discussion in the submittal/scoping meeting, a distribution device of some kind is required to provide even distribution of runoff across the vegetated filter strip (Filter Strip Major Design Element #3, page 13-1, 2007 BMP Manual) unless permanent, sustained sheet flow can otherwise be demonstrated. Please refer to Chapter 13 — Filter Strip and Chapter 8 — Level Spreader for the design requirements of these BMP elements. Please keep in mind that changing one number may change other numbers and require the calculations, supplements, plans, and other supporting documentation to be updated. Verify all numbers are correct to ensure consistency in the application documents. Please note that this request for additional information is in response to a preliminary review. The requested information should be received in this Office prior to March 27, 2008, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. 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. If you have any questions concerning this matter please feel free to call me at (910) 796-7323 or email me at christine.nelson@ncmail.net. Sincerely, Christine Nelson Environmental Engineer ENB/can: S:\WQS\STORMWATER\ADDINFO\2008\080301.mar08 cc: Bryan Dick, Earth Tech Christine Nelson Wilmington Regional Office Page 3 of 3 request for additional information: Stormwater Project No. SW8 08... Subject: request for additional information: Stormwater Project No. SW8 080301 - SOTG From: Christine Nelson <Christine.Nelson@ncmai1.net> Date: Tue, 18 Mar 2008 12:41:39 -0400 To: earl.h.baker@usmc.mil, bryan.dick@earthtech.com, neil.dean@earthtech.com, david.towler@usmc.mil Gentlemen, I have attached a pdf version of my request for additional information for Stormwater Project SW8 080301 - Camp Lejeune - S.O.T.G. I will also send copies via mail. Thank you, Christine Express Stormwater Permitting NC-DENR W8080301 - Camp Lejeune SOTG.pdf;i Content -Type: application/pdf Content -Encoding: base64 I of 1 3/18/2008 12:42 PM '4 r TopoZone - USGS Sneads Ferry (NC) Topo Map Page 1 of l Iopoionei an Irawataeatrc�`Cro -'��t� l �i i, ,; �t StuacaIS it .10 ! �'� \ � (c�� au M• n� t e . � r� ._� ` oDalGnln � C l a t r� �. � 1` a !�� ¢ .� <. l : u �� m ivy � I JC0, 01 0 0.3 0.6 0.9 1.2 1.5 km 0 0.2 0.4 0.6 0.8 1 mi UTM 18 275864E 3830776N (NAD83/WGS84) USGS Sneads Ferry (NC) Quadrangle Projection is UTM Zone 18 NAD83 Datum M* M=-9.333 G=-1.388 http://www.topozone.com/print.asp?lat=34.59436&Ion=-77.44397&size=l&u=4&layer=D... 3/ 14/2008 I NC DENR - DIVISON OF WATER QUALITY . 0312 WHITE OAK RIVER BASIN Class Name of Stream Description Class Date Index No. NEW RIVER Goose Creek Two Pole Branch Stones Bay Mill Creek Muddy Creek Stones Creek Millstone Creek New River Restricted Area # 1 Everett Creek Ellis Cove Sneads Creek Fannie Creek Wheeler Creek Courthouse Bay New River Restricted Area # 2 Unnamed Tributary to New River (Rufus Creek) Traps Bay Traps Creek From a line extending across New River from Grey Point to a point of land approximately 2200 yards downstream from mouth of Duck Creek to Atlantic Ocean; including all unnamed bays, creeks, and other waters except restricted areas # 1 and # 2 described below. From source to New River From source to New River Entire Bay From source to Stones Bay From source to Stones Bay From source to Stones Bay From source to Stones Creek All waters within 1,000 yards of earthen dock at the United States Marine Corps Rifle Range From source to New River Entire Cove From source to Ellis Cove Bay From source to New River From source to New River Entire Bay All waters within a line beginning at the Government Dock in front of U.S. Coast Guard Detachment Barracks at Marines and running a southwest course 1,000 yards to Channel Marker #13, thence a southeasterly course 1,000 yards to Flash Beacon # 11, thence a northeasterly course 500 yards to al point on the mainland at Wilkins' Bluff, thence following the shoreline to the Government Dock From source to New River Restricted Area # 2 Entire Bay From source to Traps Bay 3 SA; HQW SC; HQW SC; HQW SA; HQW SA; HQW SA; HQW SA; HQW SA; HQW SC SA; HQW SA; NOW SA; HQW SA; HQW SA; HQW SA; HQW SC SC; HQW SA; HQW SA; HQW 06/01/60 19-(27) 08/01/90 19-28 08/01/90 19-29 06/01/56 19-30 06/01/56 19-30-1 06/01/56 19-30-2 06/01/56 19-30-3 06/01/56 19-30-3-1 06/01/56 19-31 06/01/56 19-32 06/01/56 19-33 06/01/56 19-33-1 06/01/56 19-34 06/01/56 19-35 06/01/56 19-36 06/01/56 19-37 08/01/90 19-37-1 06/01/56 19-38 06/01/56 19-38-1 23 .0300 State Stormwater Permit Application Trackink Cover Sheet Wilmington Regional Office Project Name: SPECIAL OPERATIONS TRANINING (SOTG) IMPROVEMENTS-MCB Project Category: NEW Project Type: INFILTRATION SYSTEM App Accept Date: 3/12/2008 Application Fee Amt. $ 7t Fee Check Number: Reviewer Name: NELSON, CHRISTINE Record the following information from BIMS after project has been entered! Permit Number (BIMS): ,5 GJ f108D30 / Please update the SW Access System by entering the Permit Number for the project! Date Entered in Access:-3Zi3�D Entered in Access By: Date Printed: 311312008 9:58:26 AM EarthTeeh Suite IF Center Drive P 919854625 Suite 475 919,854,6259 A ryco International Ltd. Company Raleigh, NC 27607 earthtech.com March 11, 2008 Earth Tech of North Carolina Bryan M. Dick, PH, EIT 701 Corporate Center Dr. Suite 475 Raleigh, NC 27607 919-854-6252 NC DWQ Christine Nelson 127 Cardinal Dr. Ext. Wilmington, NC 28405 Re: USMC — SOTG Express Stormwater Mrs. Nelson, 7MAR EIVED ] 2 2008 I have enclosed the permit application and supporting documents for the SOTC site at Camp Lejeune, NC. A check is also included to cover the applicable express stormwater fee. Please let me know if you need anything else. Thank you in advance for your assistance. 4e4� // '0� Bryan M. Dick, PH RE: 1-MC SOTG Subject: RE: USMC SOTG From: "Dick, Bryan" <Bryan.Dick@earthtech.com> Date: Wed, 20 Feb 2008 16:15:11 -0500 To: "Janet Russell" <Janet.Russell@ncmai1.net> We are confirmed. Thank you for the help. Bryan Bryan M. Dick, PH Project Manager EARTH TECH, INC. 701 Corporate Center Drive, Suite 475 Raleigh, NC 27607-5074 Phone: (919) 854-6252 864-506-1465 (cell) Fax: (919) 854-6259 -----Original Message ----- From: Janet Russell[mailto:Janet. Russell@ncmail.net] Sent: Wednesday, February 20, 2008 2:38 PM To: Dick, Bryan; Funk, John; Baker CIV Carl H; Towler GS05 David W Subject: Re: USMC SOTG *SOTG At Camp Lejeune* February 20, 2008 Gentlemen: The Express Stormwater Submittal Meeting has been rescheduled for *March 4, 2008 at 10:30 AM with Christine Nelson* here in the Wilmington Regional Office. Mr. Carl Baker or his assistant is required to attend the meeting. I'm not sure that we provided you a copy of the Session Law that deals with the federal Phase II stormwater rules. A copy is attached in case we didn't. Please review pages 13, 14, 15 in particular for design requirements of measures within the Phase II counties. Please respond within 2 business days to confirm and reserve the submittal meeting date. Thanks, Janet Russell Express Permitting Dick, Bryan wrote: Hi Janet, Can you let me know of dates and times that we can re -schedule the express stormwater review for the SOTO site. You may recall, but we cancelled our Tuesday appointment due to a realization that we did not have flow splitters on the plans. David Towler, Mr. Baker's representative is unavailable Feb. 26-28, so if we van avoid those days that would be great. I can make a point to be available as 1 of 2 2/20/2008 5:26 PM RE: USMC SOTG needed. Have a good day! Bryan **/Bryan M. Dick, PHI** /*/Project Manager/*//*/ **EARTH TECH, INC.** 701 Corporate Center Drive, Suite 475 Raleigh, NC 27607-5074 Phone: (919) 854-6252 864-506-1465 (cell) Fax: (919) 854-6259 2 of 2 2/20/2008 5:26 PM RE: S&C Improvements Subject: RE: SOTC Improvements From: 'Dick, Bryan" <Bryan.Dick@earthtech.com> Date: Fri, 8 Feb 2008 13:52:54 -0500 To: "Janet Russell" <Janct.Russell@ncmai1.net> Thanks Janet. We are confirmed. I checked on the date of the wetland survey and it was approved in 2006, surveyed in 2005. As far as the demolition of the structures go, the only reason I presented them was to illustrate the improvements to the project site will have an improvement to the adjacent wetlands. The removal of the structures, though not a part of this project or this permit, will be performed in a area that is currently mowed and driven on by heavy equipment. I am told that officials at the base expressed concerns about the continued use of the training facilities near the wetlands due to the activity that it creates within 50' of the wetlands. This project does not cause any action to or near the wetland that is not already occurring. After completion, the base intends to not have equipment and training in the area near the wetland, thus the removal of an existing impact is the only probable outcome. In example, an equipment roadway that is currently in use, will no longer be used after the installation of these structures. Bryan M. Dick, PH Project Manager EARTH TECH, INC. 701 Corporate Center Drive, Suite 475 Raleigh, NC 27607-5074 Phone: (919) 854-6252 864-506-1465 (cell) Fax: (919) 854-6259 -----Original Message ----- From: Janet Russell [ mailto:Janet.Russell@ncmail.net] Sent: Friday, February 08, 2008 12:55 PM To: Dick, Bryan; Baker CIV Carl H; Funk, John; Christine Nelson Subject: SOTC Improvements SOTC Improvements February 8, 2008 Gentlemen: The Express Stormwater stubmittal meeting has been scheduled with *Christine Nelson on February 19, 2008 at 10:00 AM * here in the Wilmington Regional Office. * Mr. Carl Baker or his assistant is required to attend the meeting. have reviewing the Express Request Ms. Nelson noted that you may not have designed the project in compliance with the requirements under the Session Law. All projects within 1/2 mile and draining to SR waters must control and treat the difference in runoff from the pre and post conditions. See the Session Law (attachment) page 15, which is applicable in Onslow County. Please email Christine if you have a specific question about your design. Also, note that the project narrative says "Associated wetlands that are adjacent to the UT to the North of the site will benefit from the removal of structures within 20 feet of the tributary and the reduced activity around the UT due to the elimination of those structures." Wetlands generally occur adjacent to a tributary. Therefore we are would be remiss not to ask if there is a wetland delineation signed by 1 of 2 2/8/2008 2:08 PNI RE: SOT ; Improvements the Corps of Engineers (within the last 5 years since they expire after 5 years); are the existing structures to be removed in or adjacent to wetlands?; will there be wetland impacts as a result of mobilization of equipment or trucks associated with removal of the structures? *Please respond within 2 business days to confirm and reserve the submittal meeting date and time*. Also, review the attachment, "submittal requirements". Thank you, Janet Russell Express Permitting 2 of 2 2/8/2008 2:08 PM MA NCDENR: North Carolina Department of Environment and Natural Resources 127 Cardinal Drive Extension, Wilmington, NC 26405 (910) 796-7215 FAX (910)350-2004 Request for Express Permit Review FILL-IN all information below. FAX to Express Coordinator along with a completed ques a detailed narrative and vicinity map of the project location. Reviewer -C! 0 N Submit 2. — l 1 t�+ Time t0'.0i 0 3S Confirm onnake, APPLICANT: Name dA&L A. 'BAkE2 Title 1)ep'Jv A.U'r Woo<- O ,r Company Name NtCT6 cA,NMP I E-lEu N E Address r31dq�• loos MtC*AEL- za City r14413 CAW 1.15srwv9 Zip z05Lilzszf Phone 410- `I51 2213 Fax Email cnar-, N, BAeERa wsmc,mrc PROJECT: Name County vrv5i_ ENGINEER/CONSULTANT INFORMATION: 5b q 150 G- Wo'N br:pm r7ic_ic- Name 'Sohn ur k Company IFAiLT14 TECH Addressyout ra2Po2RrE Lrx. DR surm vas City gAg ErGN State__NC Zip 177607 phnna G16_ gets- ,_n20 P.v O14 _ OCN_ Z-,,6 GMnil _-6.._ (?. _'L rl i\_ _r_ - _ ❑ SCOPING MEETING ONLY DWQ DLR DCM Other ❑STREAM ORIGIN DETERMINATION _ # of Stream calls Stream �,S,T-ORMWA,TERJ ❑ Low Density ❑ High Density -Detention Pond ❑High Density -Other (check all that apply) ❑ Low Density -Curb & Gutter High Density -Infiltration ❑ Off -site Wetlands MUST be addressed below NPDES Phase 11 Plan Revision ----------------------- ................. -....... -..... -... ------------- •------------ --------- ---------------------------------------------- -------------- -- ❑� COASTAL MGT. gExcavation & Fill ❑ Bridges & Culverts ❑ Structures Information ❑ Upland Dev 1 ❑ LAND QUALITY ® Erosion and Sedimentation Control Plan with acres to be disturbed 0 WETLANDS (401) Wetlands on Property ? ❑ Yes oNo Isolated Wetlands on Property? ElYes X No El all that apply) Wetlands will be impacted? Yes No Wetland impacts: IyA acre(s) Wetlands delineation has been completed? NJYes ❑ No ❑ Buffers impacted: Acre(s) USACOE Approval of Delineation completed? ❑ Yes ❑ No 404 Application in Process w/USACOE? ❑ Yes M No / Permit recv'd from USACOE❑Yes ❑ No 401 Application Required? ❑ Yes o No It 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 application. Total Fee:$ iccl �-o C. b Stormwater $ CAMA 5_ LOS S 401 Revised 10/9/2007 tlz v iv SPA uY\O F'�F Date Received 1E C E I V E D ;pf FEB 0 7 2008 PROJ # Fr- Or.x PS IS 1 Project Name uSMGt3 Stormwater Express Questionnaire (10/9/2007) 1. . What is the applicant's full legal name? _ M.4 4NF 6oRPS 6,4SE DAMP Lxm�ayc_ Is the applicant associated with Sole proprietor. Corporation ❑ LLC e Partnership e Municipality — U • S. GovT, If it's an LLC, is it ❑ Manager -managed or ❑ Member -managed? OWhat is the applicant's title within the Corp., LLC or Partnership? Will an agent (someone other than the applicant) be signing the application? Ll Yes No If Yes, what is the agent's name and title? OP/ease note the application signature requirements are listed in NCAC 2H.1003 (e), to summary, only the sole proprietor of a sole proprietorship, the designated manager, member - manager, president or vice president of a corporation or LLC, the general partner of a partnership, or a ranking official of a municipality may sign permit applications and supplements. The signature of the engineer or other agent can be accepted only if accompanied by a signed letter of authorization from one of the aforementioned individuals. Corporations, LLC's and Partnerships must be registered with the NC Secretary of State's Office, and be active. Please note that spelling, capitalization, and punctuation are extremely important. Please provide the entity name exactly as on file with the NC Secretary of State. 2 Project Location: County [orv.5/ n v./ Nearest Town/City �EtClcsory V tr t I- tJC (Attach a detailed vicinity map with both local street names and SR, NC, US orinterstate highway numbers, plus other relevant information such as town or city names, directions to, etc. Show the nearest intersection of two major roads on the vicinity map. A major road is any 1, 2 or 3 digit NC, US or interstate highway.) If the project is located in Brunswick, Onslow, or New Hanover Counties, or a small portion of northern Pender County, NPDES Phase II Post -Construction rules will apply, unless a vested development right, as described in the Session Law, can be demonstrated, which is dated prior to July 1, 2007, 3. Receiving stream name NEW 2 iyEFt River Basin NEW /Zl vEK What is the classification of the receiving stream? 5A wh7FR For SA or SR waters, a separate scaled topographic map will be required. The project must be accurately located on the map and the !,� mile radius from the property corner closest to the SA or SR receiving stream must be drawn on the map. If you claim that the project is not within Y2 mile of SA or SR waters, you must conduct a series of chlorides tests to demonstrate that the chlorides level at a point in the receiving stream that is at least % mile from the project is less than 500 ppm. Samples must be sent to a State certified lab for testing. 4. If the project is high density, what type of stormwater management BMP's are being proposed? (check all that apply) Wet Detention Infiltration Trench Infiltration Basin Sand Filter Bio-retention Wetlands Alternative 8 Offsite Dry Detention NPDES Phase It Other How many separate BMP's are being proposed? 1 2 3 4 5 608 9 10 11 12 Other_ 5. Is there offsite runoff from the adjacent properties or public right -of -wax that will drain into N/A of the proposed BMP's on the project and is not being diverted? 0 Yes No 6- Is a road across other properly required to access the project? ❑ Yes N No ❑ N/A 7. Is there any existing development or pre-1988 existing BUA located on the pro eriy? (Please docurnent. delineate and identify on the phns.) � Yes r] No ❑ N/A J. Will the high density project collect all of the proposed BUA? X Yes L] No f- N/A E C (it not, attach a separate explanation sheet) E Y E D Page 1 of 2 R Revised 10/9/2007 FEB 0 7 2008 DWO PROJ # 9. Project Name (t5 Wa - 50TG Will the project involve the subdivision and sale of property? []Yes, kNo ❑ WA Is the subdivision ❑ residential or ❑ commercial? How many lots are proposed? (Deed restrictions are required for all residential, commercial, tow density or high density sub- divisions. Specific language for the various types of subdivisions is available from DENR.) 10. Will the plans show all delineated wetlands? Yes ❑ No ❑ N/A (All projects require either a signed wetlands delineation map or a wetlands report to be submitted with the application. Only a trained professional may provide information regarding the presence or absence of wetlands.) 11. Are wet detention ponds or other engineered controls proposed to be located adjacent wetlands? ❑ Yes plc No El N/A (If, yes, a physical means to prevent the dewatering of the wetland must be provided, or the SHWT must be provided to demonstrate that the permanent pool of the BMP is above the SHWT and will not dewater the wetlands over time. Where possible, all BMP's and swales should outlet into back the wetland (with level spreaders). 12. For infiltration projects, a site visit must be completed with the DENR soils scientist to verity the soil type, water table and infiltration rate provided in the soils report. What is/was the scheduled site visit date? l)Oy, lar a00 (Include a copy of the consultant's soil report with the application.) 13. Level Spreaders are required at the outlet of all engineered controls and swales prior to entering surface waters or wetlands. Will the plans reflect level spreaders? U Yes ❑ No ❑ N/A (The purpose of the level spreader is to reduce the energy of the incoming runoff and to promote diffuse sheet flow to prevent erosion and scour into the receiving waters or wetlands.) 14. Is this project 8 A modification to an existing permit A lot that will be treated in an existing, previously permitted BMP? What is the name of the existing permitted facility? AIA What is the permit number of the existing permitted facility? SW8 A/ A Is the permitted facility in compliance with its permit? Yes No [[[���N/A Have the deed restrictions been recorded? Yes No Vl N/A Have the deed restrictions been submitted? Yes No H (j�� N/A Has the Designer's Certification been submitted?H Yes No N/A 15. Do the plans reflect all information in 15A NCAC 2H.1003 (g)? [0 Yes ❑ No ❑ N/A 16. Will all of the design requirements for each proposed BMP be met? M Yes ❑ No ❑ N/A (It not, attach a separate explanation sheet. Please note that the Express program is not set up to handle any type of deviation from the standard design.) 17. For each BMP in all high density projects, and low density curb outlet swale projects, the individual drainage area for each proposed BMP must be clearly delineated. 18. Any revisions made to the application as a result of this review may cause changes to the other documentation. Plans, calculations, application, and supplements should be reviewed for any necessary changes. For example, changing the orifice size will require a modification to the calculations, the pond details on the plans, and page t of the supplement. 19. IS THE PROJECT PESIGNED AND THE APPLICATION READY TO suBMff? Rr Yos 1-1 A'o Cowpleic nppiical10n5 may i.o arcepie''d cal li'm !1 Ih('I'e IS a Ci1nCdl6!i0n In CIVI SUbII1i;1al schedule. Revised 10/9/2007 Page 2 of 2 R E C E I V E D FEB 0 7 2008 DWO PROJ# Application for Stormwater Permit Project: USMC Base Camp Lejeune— Special Operations Training Group Facilities Improvements Date: Dec. 5, 2007 The project consists of improvements to the existing SOTG facilities at Stone Bay, near Jacksonville, NC. The completed project will; add 4 gravel parking areas or pads, 7 concrete pads of 700 square feet, I concrete pad of 5,500 square feet, 2 crib walls approximate 100 feet long by 4' wide, addition of approximately 3 shipping containers as structures, and the construction of 3 open air — low rise structures of approximately 1000 square feet each. Several of the structures that are to be constructed are actually being moved away from a riparian area some 300 feet to the north of the project site in an effort to move all structures out of that area. The project site is a part of the New River basin and is approximately 1700 feet at its closest point to the river. The New River in this area is a SA class waters. The nearest body of water is a UT to the New River that runs east to West at approximately 500' to the north of the project site. To the south, another UT to the New River is approximately 1300 feet away from the site. There are no wetlands in the near vicinity of the project site. Associated wetlands that are adjacent to the UT to the North of the site will benefit from the removal of structures within 20 feet of the tributary and the reduced activity around the UT due to the elimination of those structures. The improvements to the existing facility will primarily add gravel parking areas and a few pavilions or shelters at several different locations within the approximately 17 acre facility. Proposed stonnwater treatments are infiltration basin located at 7 locations on the site, so that a minimal routing distance is obtained before stormwater is treated. Five of these sites have a channel distance of less than 30 feet with the remaining 2 having a channel distance of approximately 200 feet to collect runoff from multiple small impervious areas. A soils investigation was performed on the site on November 12, 2007 and the soils (Group A) are well suited for the application with an average infiltration rate of approximately 4.5 in/hr to a depth of4-5 feet. A vicinity map is included in the narrative that indicates proximity to the receiving waters and NRCS Soil types. j1E C E I V ED 8�,8( FEB 0 7 2008 DWO PROJ # col k Legend — Road Centerline EarthTech Vicinity Map i Roads --- Special Operations Training Ground — [_] Driveway A tgC0 ftnUonel❑l.fnmpanr Marine Corps Base Stormwater Plan Parking Area Onslow County, North Carolina F—] Existing Structures NTS Onslow County Soils u The Catena Group 410-B Millstone Drive Hillsborough, NC 27278 (919)732-1300 SOIL & SITE EVALUATION FOR STORM WATER BASINS Special Operations Training Ground Camp Lejeune, NC Prepared For: EarthTech 701 Corporate Center Drive Suite 475 Raleigh, NC 27607 Prepared By: The Catena Group Hillsborough, North Carolina November 26, 2007 /G ary S. EDFEB 0 1 2008 PROJ DWO ft __ INTRODUCTION An expansion of The Special Operations Training Ground at the Marine Corps Base at Camp Lejeune is planned. As part of the planned expansion several storm water infiltration basins are proposed. As part of the application process, a soils report detailing soil type and infiltration rate is required. The Catena Group, Inc (TCG) performed a soil investigation in the general vicinity of the proposed basins to provide the required soil information. INVESTIGATION METHODOLOGY Prior to the field investigation, the Onslow County Soil Survey was referenced to get an overview of the possible soil series located at the site. In the area of the Training Ground, two soil series; Baymeade and Marvyn were mapped. Figure I presents the mapped soil series, the general location of the proposed infiltration basins and where the borings and infiltration tests were performed. Table 1 presents the soil series, mapping unit -and taxonomic class. Table 1. Soil Series, mapping unit, taxonomic class for soils in the area of proposed expansion. Soil Series Mapping Unit Taxonomic Class Baymeade BaB,BmB Loamy, siliceous, semiactive, thermic Arenic Hapludults Marvyn MaC Fine -loamy, kaolinitic, thermic, Typic Kanhapludults The field investigation was performed on November 12, 2007. Twelve (12) Soil borings were made with a hand -turned auger in the general vicinity of the proposed infiltration basins. Observations of the landscape (slope, drainage patterns, past use, etc.) as well as soil properties (depth, texture, structure, seasonal wetness, restrictive horizons, etc.) to a depth > 48 inches, when possible, were recorded. Soil color was determined with a Mansell Soil Color Chart. One soil infiltration test (double ring infiltrometer) was performed at each of the six proposed infiltration basins. A total of six (6) infiltration tests were performed. FINDINGS Soil Type Based on the borings in the general vicinity of the proposed basins, it was determined that the majority of the soil in the Training Ground was the Baymeade soil series. There was one section of the Training Ground (ET 1) that the soil borings indicated that the Marvyn soil series was present. Table 2 presents each boring with a soil series determination. Determination of soil series was made through a comparison of soil boring descriptions to the Natural Resources Conservation Service (NRCS) Official Series Description (OSD) for both the Baymeade and Marvyn series. Table 2. Soil Borings and Soil Series Determination. Boring # Soil Series Determination ETl -1 Marvyn ET 1-2 Marvyn ET2-1 Baymeade ET2-2 Baymeade ET3-1 Baymeade ET3-2 Baymeade ET4-1 Baymeade ET4-2 Baymeade ET5-1 Baymeade ET5-2 Baymeade ET6-1 Baymeade ET6-2 Baymeade Infiltration Rate The infiltration rate was tested at the six proposed infiltration areas. The results for each test are shown below in Table 3. Data and calculations for each test are also attached. The highest result was excluded from calculating the average cumulative infiltration rate. The average infiltration result for the remaining five tests is 4.59 in/hr. Of note, the result from ET5 was very low (0.49 in/hr). During the field investigation, it was noted that there was a clayey fill material present at the surface (approximately 5 inches thick) and that the soil was very compacted. If any infiltration basin is located in this area, then this compacted fill material should be removed. Table 3. Infiltration Test Results Test Location Infiltration (in/hr ETl 7.09* ET2 5.91 ET3 5.91 ET4 3.94 ET5 0.49 ET6 6.69 Average 4.59 *result not averaged CONCLUSIONS The findings presented herein represent TCG's professional opinion based on our site and soils evaluation. This report is provided to assist in the application for the infiltration basins by providing the soil information. North Carolina DWQ must issue the final permit. Airy concurrence with the findings in this report would be made at that time. Bab ....._.. _. _.. ew .. ... _ 'ET3 ' t' MaC • ' ET 4 y.. r � �ET5- 1 *-. }4 i n :Ph eYYfnf ... MaC Legend Approximate Test Locations Soil Mapping Unit BaB BmB Mac ` Mk ,5 Tr,e Catena u� 'A a iwri' Vz OF t Special Operations Training Ground Camp Lejeune, NC Date: November2007 Figure Scale 1"=20U Job No.: 7333 ETI A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cm minute minute cm cndminutc P/C 0 11 5 0 2 10.3 2 1 1.2 0.6 4 9.4 2 3 0.9 0.45 6 8.6 2 5 0.8 0.4 8 7.9 2 7 0.7 0.35 10 7.2 2 9 0.7 0.35 12 6.6 2 11 0.6 0.3 14 6 2 13 0.6 0.3 16 5.4 2 t5 0.6 0.3 Avg last 3 0.30 cm/minute 18 cm/hr 7.09 in/hr ET2 A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute .cm minute minute cm cm/minute E/C 0 9.3 0 2 8.2 2 1 1.1 0.55 4 7.6 2 3 0.6 0.3 6 7 2 5 0.6 0.3 8 6.5 2 7 0.5 0.25 10 6.2 2 9 0.3 0.15 12 6.1 2 11 0.1 0.05 14 5.4 2 13 0.7 0J5 16 5 2 15 0.4 0.2 18 4.6 2 17 0.4 0.2 Av last 3 0.25 crn/minute 15 cm/hr 5.91 in/hr ET-3 A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cm minute minute cm cm/minute :/C 0 12 0 2 10.7 2 1 1.3 0.65 4 9.9 2 3 0.8 0.4 6 9.4 2 5 0.5 0.25 8 8.9 2 7 0.5 0.25 10 8.4 2 9 0.5 0.25 12 7.9 2 11 0.5 0.25 Avg last 3 0.25 cm/minute 15 cm/hr 5.91 in/hr ET4 A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cm minute minute cm cm/minute IJC 0 9 0 2 8.6 2 1 0.4 0.2 4 7.9 2 3 0.7 0.35 6 7.3 2 5 0.6 0.3 8 6.9 2 7 0.4 0.2 10 6.6 2 9 0.3 0.15 12 6.2 2 11 0.4 0.2 14 5.9 2 13 0.3 0.15 16 5.5 2 15 0.4 0.2 18 5.2 2 17 0.3 0.15 Avg last 3 0.17 cm/minute 10 cm/hr 3.94 in/hr ET5 A D C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cm minute minute cm cm/minute F/C 0 9.5 0 2 9.1 2 1 0.4 0.2 4 8.9 2 3 0.2 0.1 6 8.9 2 5 0 0 8 8.8 2 7 0.1 0.05 10 8.7 2 9 0.1 0.05 12 8.7 2 11 0 0 14 8.7 2 13 0 0 16 8.7 2 15 0 0 20 8.6 4 17 0.1 0.025 20 Avg 0.02 ctr✓minute 1.25 cm/hr 0.49 in/hr ET6 A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cm minute minute cm cm/minute F/C 0 8.5 0 2 6.8 2 1 1.7 0.85 4 5.8 2 3 1 0.5 6 4.9 2 5 0.9 0.45 8 4.5 2 7 0.4 0.2 10 4 2 9 0.5 0.25 12 3.4 2 11 0.6 0.3 14 2.8 2 13 0.6 0.3 Avg last 3 0.28 cndminute 17 cm/hr 6.69 in/hr DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION Complete and email this form to Vincent. Lewis@ncmail. net, If there are more than 7 area's to be tested attach a second sheet. 1 fJ-Y uf,� Scheduled Site Visit Date: l 1-3 - Time: 600 Project Name: USMC-S.O.T.G County: Onslow \ G Street Address: Dr. G.W. Garner Street \�^/ Directions from the nearest intersection of two major roads: From Jacksonville, take US 17- S, turn left onto NC 210, turn left onto Rifle Range Rd, turn rt. Onto Booker T. Washington Rd, site is to the East of the parking area >1 acre being disturbed? ®YES ❑NO CAMA Major required? ❑YES ENO/ 1 Consultant Name: Bryan Dick Phone: 919-854-6252 9 "4' Sd 10^ 1pJ Consultant Firm Name: Bore Number 1 12 3 4 5 6 7 a ExistingGround Elevation 29 28.80 27.0 27.5 28 26 20 b Proposed Bottom Elevation 27.60 27.80 25.56 26.23 26.32 23.82 18.44 c Difference a minus b 1.4 1.0 1.44 1.27 1.68 2.18 1.56 d Add 2 ft. Min. Bore Depth) 3.4 3.0 3.44 3.27 3.68 4.18 3.56 e Hardpan Depth? NA NA NA NA .5' NA NA f Infiltration Rate OK? y Y Y Y Y Y Y Approx. Elev. Of SHWT 23.6 23.8 22.0 22.5 23.0 21.0 15.0 h Max. lowest bottom elev. 25.6 25.8 24.0 24.5 25.0 23.0 17.0 Sufi : 5`na 54 ,7 3 a 9a .32-* d.,., D 3va3 Required Attachments: 1. Legible vicinity map. 2. Complete Soils Report. 3. PDF formatted site plan with the boring locations to be tested. Site plans should be emailed or hand -delivered only. Illegible faxed maps will not be accepted. 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. S:\WOS\STORMWATER\FORMS\infiltration site visit.for n Re&eft8107V ED Ipppn��uf FEB 0 6 200B D PROJ k Dwo FW: FW: Express Permit Review Subject: FW: FW: Express Permit Review From: "Dick, Bryan" <Bryan.Dick@earthtech.com> Date: Wed, 6 Feb 2008 17:36:59 -0500 To: "Janet Russell" <Janet.Russell@ncmail.net> Here is the request and supporting documents. (repeated from earlier. You mentioned that you were scheduling for the week of the 18th. I am available during the following days: Feb. 18, 19, 22, 25-28 Please let me know if you need anything else. Bryan Bryan M. Dick, PH Project Manager EARTH TECH, INC. 701 Corporate Center Drive, Suite 475 Raleigh, NC 27607-5074 Phone: (919) 854-6252 864-506-1465 (cell) Fax: (919) 854-6259 -----Original Message ----- From: Dick, Bryan Sent: Wednesday, December 19, 2007 1:23 PM To: 'Janet.Russell@ncmail.net'; Jewell, Ian Cc: Funk, John Subject: RE: FW: Express Permit Review Ms. Russel, I wanted to touch base with you on the USMC- SOTG express permit request. I have attached the email that you sent to John Funk and responses are below. My apologies for any inconvenience that was caused by the missing responses in the application regarding wetlands and I appreciate you taking the time to try to make sure we have our permit application in order when we meet. I am quickly learning all of the specifics of this process and I appreciate your patience. 1- I have attached the soils report from The Catena Group. Per the comments in the DWQ manual, we contracted TCG to perform the soils investigation at each location that we intended to put an infiltration basin. Should we have requested that your soil scientist perform this review instead? 2- I have added the answers to the wetland questions on the Express Review App and have attached a pdf of the updated application. I have also attached a GIS image of the wetlands in the project vicinity. This image and the metadata of the Delineation dates, approval, etc will accompany the full permit application. My apologies, I overlooked those questions in the first submittal. 3- The project is designed to meet the phase II reqs for pre and post and a 1.5 inch storm due to CAMA regulations. The pre and post flows are analyzed in Hydrocad to show compliance and we have designed infiltration basins per the DWQ manual guidance for surface area, storage volume for the 1.51, event, pre-treatment, etc. I believe this addresses your comment in item 3, unless something has jumped out at you that indicates we are not meeting one of the requirements. There may be something that I have overlooked and that you have already specifically noticed in the application. 4- I have used the July 2007 DWQ manual as the basis for guidance on the design and all forms will be included with the full application. 1 of 3 2/7/2008 9:54 AM FW: FW: Express Permit Review Untill, your comment, I had not realized that I needed the maintenance forms, so thank you for pointing out that we would need those as well as the supplement form. Please let me know if this does not address your concerns and when we can schedule the permit review meeting. I will be out until Dec. 26th after today. Ian Jewell has been copied on this email and may be able to answer in questions that you have in the meantime. Specifically, he should be able to get you any additional images that you need. I look forward to hearing from you. Bryan Bryan M. Dick, PH Project Manager EARTH TECH, INC. 701 Corporate Center Drive, Suite 475 Raleigh, NC 27607-5074 Phone: (919) 854-6252 864-506-1465 (cell) Fax: (919) 854-6259 -----Original Message ----- From: Janet Russell [mail to: Janet. Bus sell@ncmail.net] Sent: Monday, December 10, 2007 2:15 PM To: Funk, John Subject: Re: FW: Express Permit Review John: I have some questions / comments for your review. 1. Has Vincent Lewis, our State soil scientist, been on site to perform a review of the soils for the proposed infiltration? we did not receive an Infiltration Request nor a soils report as part of this Express Request. 2. The questions related to wetlands on the Express Cover sheet have been left blank. A Corps approved wetland delineation should be part of the stormwater submittal package. Of course the signed delineation must be less than 5 years old. 3. The project must be designed to meet the federal Phase II stormwater rules as outlined in the Session Law (attached). Please review closely, especially pages 13, 14, 15, etc. 4. The project must be designed in accordance with the new BMP Manual. New application, supplement forms, maintenance forms must be used. The link to the BMP Manual is in the Submittal Requirements attachment. Please address these items so that we may proceed with the scheduling. Thanks, Janet Funk, John wrote: Have you had a chance to look at this, please let me know - thanks. John Funk, PE Phone Office:919-854-6239, Cell: 919-632-6830 Fax 919-854-6259 2 of 3 2/7/2008 9:54 AM c FW: FW: Express Permit Review *From:* Funk, John *Sent:* Wednesday, December 05, 2007 3:48 PM *To:* 'Janet.Russell@ncmail.net' *Cc:* Icarl.h. bake r@usmc.milI; 'Marshburn GS13 Brian R' *Subject:* Express Permit Review Attached is our request for express stormwater permit review for Camp Lejeune, Special Operations Training Group (SOTG). If you have any questions, please let me know. John Funk, PE Phone Office:919-854-6239, Cell: 919-632-6830 Fax 919-854-6259 Camp Lejeune Report Content -Description: from the Catena Camp Lejeune Report from the Catena Group.pdf Group.pdf Content -Type: application/octet-stream Content -Encoding: base64 Content -Description: Express ApplicationCompleted 12-5-07.pdf Express Application Completed 12-5-07.pdf Content -Type: application/octet-stream Content -Encoding: base64 Content -Description: Wetlands_Map.pdf Wetlands_Map.pdf Content -Type: application/octet-stream Content -Encoding: base64 3 of 3 2/7/2008 9:54 AM The Catena Group 410-B Millstone Drive Hillsborough, NC 27278 (919) 732-1300 SOIL & SITE EVALUATION FOR STORM WATER BASINS Special Operations Training Ground Camp Lejeune, NC Prepared For: BarthTech 701 Corporate Center Drive Suite 475 Raleigh, NC 27607 Prepared By: The Catena Group Hillsborough, North Carolina November 26, 2007 I _ / Gary S. Kreiser INTRODUCTION An expansion of The Special Operations Training Ground at the Marine Corps Base at Camp Lejeune is planned. As part of the planned expansion several storm water infiltration basins are proposed. As part of the application process, a soils report detailing soil type and infiltration rate is required. The Catena Group, Inc (TCG) performed a soil investigation in the general vicinity of the proposed basins to provide the required soil information. INVESTIGATION METHODOLOGY Prior to the field investigation, the Onslow County Soil Survey was referenced to get an overview of the possible soil series located at the site. In the area of the Training Ground, two soil series; Baymeade and Marvyn were mapped. Figure 1 presents the mapped soil series, the general location of the proposed infiltration basins and where the borings and infiltration tests were performed. Table 1 presents the soil series, mapping unit and taxonomic class. Table 1. Soil Series, mapping unit, taxonomic class for soils in the area of proposed expansion. Soil Series Mapping Unit Taxonomic Class Baymeade BaB,BmB Loamy, siliceous, semiactive, thermic Arenic Hapludults Marvyn MaC Finc-loamy, kaolinitic, thermic, Typic Kanhapludults The field investigation was performed on November 12, 2007. Twelve (12) Soil borings were made with a hand -turned auger in the general vicinity of the proposed infiltration basins. Observations of the landscape (slope, drainage patterns, past use, etc.) as well as soil properties (depth, texture, structure, seasonal wetness, restrictive horizons, etc.) to a depth > 48 inches, when possible, were recorded. Soil color was determined with a Munsell Soil Color Chart. One soil infiltration test (double ring infiltrometer) was performed at each of the six proposed infiltration basins. A total of six (6) infiltration tests were performed. FINDINGS Soil Type Based on the borings in the general vicinity of the proposed basins, it was determined that the majority of the soil in the Training Ground was the Baymeade soil series. There was one section of the Training Ground (ET 1) that the soil borings indicated that the Marvyn soil series was present. Table 2 presents each boring with a soil series determination. Determination of soil series was made through a comparison of soil boring descriptions to the Natural Resources Conservation Service (NRCS) Official Series Description (OSD) for both the Baymeade and Marvyn series. Table 2. Soil Borings and Soil Series Determination. Boring 4 Soil Series Determination ET1-I Marvyn ET I -2 Marvyn ET2-1 Baymeade ET2-2 Baymeade ET3-1 Baymeade ET3-2 Baymeade ET4-1 Baymeade ET4-2 Baymeade ET5-1 Baymeade ET5-2 Baymeade ET6-1 Baymeade ET6-2 Baymeade Infiltration Rate The infiltration rate was tested at the six proposed infiltration areas. The results for each test are shown below in Table 3. Data and calculations for each test are also attached. The highest result was excluded from calculating the average cumulative infiltration rate. The average infiltration result for the remaining five tests is 4.59 in/hr. Of note, the result from ET5 was very low (0.49 in/hr). During the field investigation, it was noted that there was a clayey fill material present at the surface (approximately 5 inches thick) and that the soil was very compacted. If any infiltration basin is located in this area, then this compacted fill material should be removed. Table 3. Infiltration Test Results Test Location Infiltration (in/hr) ETI 7.09* ET2 5.91 ET3 5.91 ET4 3.94 ET5 0.49 ET6 6.69 Average 4.59 *result not averaged CONCLUSIONS The findings presented herein represent TCG's professional opinion based on our site and soils evaluation. This report is provided to assist in the application for the infiltration basins by providing the soil information. North Carolina DWQ must issue the final permit. Any concurrence with the findings in this report would be made at that time. r7r �2, ^ET4 a _ r� 4• ame r r . � r � me' ET Legend Approximate Test Locations P Soil Mapping Unit - BaB - BmB - Mac _ Mk The Catena 6%4 Group Special Operations Training Ground Camp Lejeune, NC )ate: November 2007 Figure Scale 1"=200' Job No.: 7333 ETI A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cm minute minute cm cm/minute (E/C 0 11.5 0 2 10.3 2 1 1.2 0.6 4 9.4 2 3 0.9 0.45 6 8.6 2 5 0.8 OA 8 7.9 2 7 0.7 0.35 10 7.2 2 9 0.7 0.35 12 6.6 2 11 0.6 0.3 14 6 2 13 O.6 0.3 16 5.4 2 15 0.6 0.3 Avg last 3 0.30 cut minute 18 cm/hr 7.09 in/hr ET2 A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cut minute minute cut cm/minute (E/C) 0 9.3 0 2 8.2 2 1 1.1 0.55 4 7.6 2 3 0.6 03 6 7 2 5 0.6 0.3 8 6.5 2 7 0.5 0.25 10 6.2 2 9 03 0.15 12 6.1 2 11 0.1 0.05 14 5.4 2 13 0.7 0.35 16 5 2 15 0.4 0.2 18 4.6 2 17 0.4 0.2 Avg last 3 0.25 Can minute 15 cm/hr 5.91 inQlr ET3 A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cm minute minute Cut cm/minute (E/C 0 12 0 2 1M 2 1 1.3 0.65 4 9.9 2 3 0.8 0.4 6 9.4 2 5 0.5 025 8 8.9 2 7 0.5 0.25 10 8.4 2 9 0.5 0.25 12 7.9 2 11 0.5 0.25 Avg last 3 0.25 cm/minute S cm/hr 5.91 in/hr ET4 A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute Cm minute minute Cm enl/minute (E/C 0 9 0 2 8.6 2 1 0.4 0.2 4 7.9 2 3 0.7 0.35 6 7.3 2 5 0.6 0.3 8 6.9 2 7 0.4 0.2 10 6.6 2 9 0.3 0.15 12 6.2 2 11 0.4 0.2 14 5.9 2 13 0.3 0.15 16 5.5 2 15 0.4 0.2 18 5.2 2 17 0.3 0.15 Ave last 3 0.17 cn✓minute 10 cm/hr 3.94 in/hr ET5 A B C D E F Time Reading Imen,al Midpoint Water Change Flow Rate minute cm minute minute cm cm/minute (E/C 0 9.5 0 2 9.1 2 1 0.4 0.2 4 8.9 2 3 0.2 0.1 6 8.9 2 5 0 0 8 8.8 2 7 0.1 0.05 10 9.7 2 9 0.1 0.05 12 8.7 2 11 0 0 14 8.7 2 13 0 0 16 9.7 2 15 0 0 20 9.6 4 17 0.1 0.025 20 Avg 0.02 cm/minutc 125 cm/hr 0.49 in/hr ET6 A B C D E F Time Reading Interval Midpoint Water Change Flow Rate minute cm minute minute cm CII]/mlmne (E/C) 0 9.5 0 2 6.8 2 1 1.7 0.85 4 5.8 2 3 1 M 6 4.9 2 5 0.9 0.45 8 4.5 2 7 0.4 0.2 10 4 2 9 0.5 0.25 12 3.4 2 11 0.6 0.3 14 1 2.8 1 2 13 R6 0.3 Avg last 3 0.29 cm/minulc 17 cm/hr 6.69 in/Iv The Catena Group 410-6 Millstone Drive Hillsborough, NC 27278 (919)732-1300 SUPPLEMENT SOILS REPORT FOR STORM WATER BASINS Special Operations Training Ground Camp Lcjcune, NC Prepared For: EarthTcch 701 Corporate Center Drive Suite 475 Raleigh, NC 27607 Prepared By: The Catena Group 1-lillsborough, North Carolina March 31. 2008 / Gary S. Kreiser INTRODUCTION This Soils Report is a supplement for the November 2007 Soils Report for The Special Operations Training Ground (SOTG) proposed infiltration basins at the Marine Corps Base at Camp Lejeune. The original Soils Report included the soil type and infiltration rate for six (6) proposed basins. Based on comments received from the NC Division of Water Quality (DWQ) the depth to seasonal high water table (SHWT) is being requested. DEPTH TO SEASONAL HIGH WATER TABLE Since the soil is typically sandy, the depth to S14WT was determined through the presence of either redoximorphic features or the occurrence of saturated soil. Borings were performed in the area of the proposed basins and Table I presents the basin location and the determination of the SHWT. Table I. Seasonal Fli_h Water Table Determination Test Location SHWT (inches below ground surface) ETI / 36 ET2 36 ET3 33 ET4 34 ETS 55 ET6 34 CONCLUSIONS The findings presented herein represent TCG's professional opinion based on our site and soils evaluation. This supplement report is provided to assist in the application for the infiltration basins by providing the requested seasonal high water table information. NCDWQ must issue the final permit. Any concurrence with the findings in this report would be made at that time. The Catena Group 410-B Millstone Drive Hillsborough, NC 27278 (919)732-1300 ADDENDUM TO SOILS REPORT FOR STORM WATER BASINS Special Operations Training Ground Camp Lejeune, NC Prepared For: EarthTech 701 Corporate Center Drive Suite 475 Raleigh, NC 27607 Prepared By: The Catena Group Hillsborough, North Carolina April 2, 2008 / o Solt S�\ tP ate_=e`ia / Gary S. Kreiser INTRODUCTION This Soils Report is an addendum to the November 2007 Soils Report for The Special Operations Training Ground (SOTG) proposed infiltration basins at the Marine Corps Base at Camp Lejeune. The original Soils Report included the soil type and infiltration rate for six (6) proposed basins. At the request of Earth Tech an additional infiltration basin was evaluated (ET 7). INVESTIGATION METHODOLOGY The field investigation was performed on March 27, 2008. Soil borings were made with a hand - turned auger in the vicinity of the proposed infiltration basins. Observations of the landscape (slope, drainage patterns, past use, etc.) as well as soil properties (depth, texture, structure, seasonal wetness, restrictive horizons, etc.) to a depth ? 48 inches, when possible, were recorded. Soil color was determined with a Munsell Soil Color Chart. The rate of water entry into a soil is referred to as the infiltration rate. The infiltration rate into a soil decreases with time mainly due to an increase in the soil water content and a decrease in the hydraulic gradient. As infiltration continues, the rate of water entry into the soil reaches a constant value (steady state condition) which is considered to be the same as the saturated hydraulic conductivity (KSAT) of the soil. The Ks, is a soil property that can be easily measured in the field and was used to characterize the infiltration rate for each proposed infiltration basin. Saturated Hydraulic conductivity (K,AT) measurements were performed at the proposed infiltration basin using a constant -head permeameter (Amoozemeter). Before any readings were recorded, the Amoozemeter was allowed time to equilibrate, typically 25 minutes. Based on conservations with the designer of the proposed infiltration basin (Bryan Dick of Earth Tech), construction of these basins would remove approximately 6 to 12 inches of topsoil. As such, the Ks, , measurements were performed around a depth of 12 inches in order to estimate the infiltration rate at the new, soil surface. FINDINGS Soil Type Determination of the soil series was made through a comparison of soil boring descriptions to the Natural Resources Conservation Service (MRCS) Official Series Description (OSD) for the soil series that were mapped by the NRCS for this site. Based on this comparison it appears that the soil in the vicinity of ET 7 is most likely to be the Marvyn soil series. Depth to Seasonal High Water Table During the field investigation, the depth to the seasonal high water table (SHWT) was determined. Since the soil was typically sandy, the determination of the SHWT was made through field indicators of redoximorphic features or the presence of saturated soil. Table I presents the determination of the SHWT. Table I Depth to SHWT Location SHWT Determination (inches below Surface) ET 7 22 Infiltration Rate Multiple saturated hydraulic conductivity tests were performed at each proposed infiltration basin. The results for each test are shown below in Table 2. Data sheets for each hydraulic conductivity tests are also attached. At each basin location the geometric mean was taken and is presented in Table 2. The geometric mean was calculated instead of the arithmetic mean, as it tends to dampen the effect of very high or low values, which might bias the arithmetic mean if a straight average was calculated. Table 2 Results of Saturated Hydraulic Conductivity Tests and Geometric Mean Test Location Test Number Test Depth (inches) Measured KSAT (in/hr) Geometric Mean (in/hr) ET 7 1 12.6 4.63 5.23 2 13.0 6.19 3 12.6 0.34 Since soil is inherently non -homogeneous, field tests can often misrepresent the areal hydraulic conductivity of a soil. Typically, field tests underestimate the saturated hydraulic conductivity of clayey soil and overestimate it in sandy soils. As a result of this misrepresentation a "moderation factor" is suggested to convert point saturated hydraulic conductivity to areal saturated hydraulic conductivity for each proposed infiltration basin. Since the soil is typically fine sand or loamy sand, a moderation factor of 0.5 was used to correct for the potential of overestimating the infiltration rate. Table 3 presents the saturated hydraulic conductivity geometric mean for each infiltration basin as well as a moderation factor to get an area infiltration rate for each proposed infiltration basin. Table 3 Geometric Mean, Moderation Factor and Areal Infiltration Rate for ET 7 Test Location Geometric Mean Moderation Factor Areal Infiltration Rate (inches/hour) ET 7 5.23 0.5 2.61 CONCLUSIONS The findings presented herein represent TCG's professional opinion based on our site and soils evaluation. This report is provided to assist in the application for the infiltration basins by providing the soil information. North Carolina D WQ must issue the final permit. Any concurrence with the findings in this report would be made at that time. HYDRAULIC CONDUCTIVITY STUDY STOG Data: Lz]arofi w®Irs fa,noon: sunw Lors— Basin? Isme lve(H 60 NumEac I .e,i O Deno mes): 12.6 fIP Tisi Water Lev.: 150 59 cre Rry—rg Water Level 140 55 Hde Oegn (oral: 320 (1$6 EMN: ng Write, Lev130 5.1 Reference(cm) 130 5.1 Hemet imi 150 59 CHT Ti see, = 30.0 Htle remain, 1—) 5� Hde mealua (1. 2 t5 Vnlva 5emn9: r casim ons A: 000I 436 1-0N 3-0N NOTE: Flooli ler. an land, Water Level Cwersian FeGM (C F.): 1010 tioi charge In Chamber de" Ell Tom. G K K K HYDRAULIC CONDUCTIVITY STUDY OG O. 13sin7 Numnr. Horlmor O oevin mclres): uo F Tarael water Level: 150 59 B 5i=n Welw Level: 130 59 HdeDeter .130 Ela4rg Water Level: t]0 51 Deter—(con1: 110 43 He.159 - 15.0 LHT iu6sm e(sJ utllny CIAT =290 Hde tlinmeler (cmj 60 Hae aelua Oh z 5 Valve Setlup:1 mel5Gen1 P: (I -0N -0N NOTE: Rentlings 6xxtl on EnJiml Water Laval Cwaro on Fecl« C i.I 105.0 W.I., riemo ClamCer d-i, Elogno Time D K K K ReeJire vtoerlevel CE. tome (min) lmm) (hr) (cmLnrl (cramp (iNnr) 9ounu2 343 00 1050 15 I I I ]f.699 389 $1.5 Ia 1050 65 IN0.011 AAA 126E0$ i9T HY-1.1-1C CONDUCTIVITY STUDY STOG Orate: 3l2JY2W8 ratim Lo: Basin? Numper 3 e O Da9m(mcnuesea): 126 Tar9.W.er Lev.: 110 S9 rags Be Lava6. 110 a.3 Dapple). 3?0 i126 Eresn9Wafer ENirp Water Leah: 110 43 Ree Reler(.)lcml: 150 ,59 -15-0 59 CHIHasTrove CHI Tu6u(a)sltmg: =]90 Hdetllame� 5.0 Ha25 i(r VNue $etivg: 1 a 1 a —nos ¢eHiG�anl A: 0031621 -0N -0N NOTE: Reatllrgs In. on EnOng W aler Level Coamsicn Fri C I 1 1050 We. ctannion C1mml tl k Elato Time 0 K K K 11.493 831d 9 9 8� 100 6 1Mw 0011 SEND 161163 931