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HomeMy WebLinkAboutSW8080734_HISTORICAL FILE_20080915STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW80k013'A DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ® HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE Zooeo°liro YYYYMMDD a -r Michael P. Easley, Governor � William G. Koss Jr., Secretary rNorth Carolina Department of Environment and Natural Resources 1 Y Colecn fI. Sullins Director Division of Water Quality September 15, 2008 MCB Camp Lejeune c/o Carl Baker Camp Lejeune 1005 Michael Rd Camp Lejeune, NC 28547 Subject: State Stormwater Permit No. SW8 080734 Intel BN Interim Facilities Const. Control No: N40085-08-B- 0056 High Density Project Onslow County Dear Mr. Baker: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Intel BN Interim facilities on September 8, 2008. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 080734 dated September 15, 2008, for the construction of the subject project. This permit shall be effective from the date of issuance until September 15, 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 thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Malcolm Boney, or me at (910) 796-7215. Sincerely, Edward Beck Regional Supervisor Surface Water Protection Section ENB/mb: S:\WQS\STORMWATER\PERMIT\080834.sep08 cc: Bryan Dick, Earth Tech Malcolm Boney, NCDENR Wilmington Regional Office Central Files N re hCarolina Xalurally North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www.newaterqualitv.ore Fax (910)350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer — 50% Recycledl10% Post Consumer Paper State Stormwater Management Systems Permit No. SW8 080734 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY COMMERCIAL DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Mr. Carl Baker c/o MCB Camp Lejeune Intel BN Interim Facilities Birch St., Camp Lejeune, Onslow County FOR THE construction, operation and maintenance of 3 infiltration basin(s) in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until September 15, 2018, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 3 of this permit. The stormwater controls A, B and C have been designed to handle the runoff from 51,836 square feet, 41,817 square feet, and 44,431 square feet, of impervious area, respectively. 3. Each basin must be operated with a 50' vegetated filter. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. The built -upon area for the future development is limited to 0 square feet. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. Page 2 of 7 State Stormwater Management Systems Permit No. SW8 080734 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. The following design criteria have been permitted for the infiltration basin(s) and must be provided and maintained at design condition: Basin: A Basin: B Basin: C a. Draina a Area, acres: 3.36 1.27 1.34 0nsite, ft 146,362 55,321 57,934 Offsite, ft 0 0 0 b. Total Impervious Surfaces, ft : 51,836 41,817 44,431 C. esig n Storm, inches: 1.5 1.5 1.5 d. Basin De th, eet: 2.1 1.8 1.5 e. Bottom Elevation, FMSL: 18.3 18.8 19.3 f. Bottom Surface Area, ft : 2,479 2,257 3,120 9. Bypass Weir Elevation, FMSL: 20.4 20.6 20.8 h. Permitted Storage Volume, ft: 6,749 5,120 5,537 i. Type of Soil: Ba meade Ba meade Ba meade j. Expected Infiltration Rate, in/hr: 2.16 0.85 1.7 k. Seasonal High Water Table, FMSL: 17.3' 16.8 16.3' I. Time to Draw Down, hours: 15 32 12 M. Receiving Stream/River Basin: Beaverdam Creek / White Oak n. Stream Index Number 19-20-2 o. Classification of Water Body SB NSW 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. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, infiltration media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. Page 3 of 7 State Stormwater Management Systems Permit No. SW8 080734 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 must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. Access to the stormwater facilities shall be maintained via appropriate recorded easements at all times. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. Prior to the construction of any permitted future areas shown on the approved plans, the permittee shall submit final site layout and grading plans to the Division for approval. 11. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. At the time the permit is transferred to a new owner, the permittee shall forward the approved plans to the new owner. 12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS 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 supporting 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. Page 4of7 State Stormwater Management Systems Permit No. SW8 080734 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. 7. The permit remains in force and effect until modified, revoked, terminated, or renewed. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance, renewal or termination does not stay any permit condition. 8. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 9. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 10. 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. 11. The permittee shall submit a permit renewal application at least 180 days prior to the expiration date of this permit. The renewal request must include the appropriate documentation and the processing fee. Permit issued this the 15th day of September 2008. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No. SW8 080734 Intel BN Interim Facilities Stormwater Permit No. SW8 080734 Onslow County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 6 of 7 State Stormwater Management Systems Permit No. SW8 080734 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 outlet / bypass structure weir elevation is per the approved plan. 6. The outlet / bypass structure is located per the approved plans. 7. A Trash Rack is provided on the outlet / 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. 15. All components of the stormwater BMP are located in either recorded common areas or recorded easements. cc: NCDENR-DWQ Regional Office Page 7 of 7 DWQ USE ONLY Date Received Fee Paid Permit Number — 00,— 3 Q State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATIO This form may be photocopied for use as an original 1 NUB (' 5 2008 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.baker@usmc.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 - Intel 5. Location of Project (street address): City:Camp Lejeune County:Onslow 6. Directions to project (from nearest major intersection): From Lejeune main gate take Holcomb Blvd to traffic circle, right onto McHugh Blvd for approximately .8 miles turn rt. onto Birch st project on right at 25 miles 7. Latitude:34-40-27.5 N Longitude77-20-5505 W of project 8. Contact person who can answer questions about the project: Name:Bryan Dick Telephone Number: (919-854-6252 ) Email:bryan.dick@earthtech.com if. PERMIT INFORMATION: 1. Specify whether project is (check one): ®New ❑Renewal ❑Modification Form SWU-101 Version 8.07 Page I 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 SNIP ❑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. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Stormwater will be routed via grassed swales from imperivous areas to 3 infiltration basins. The infiltration basins meet DWO requirments for drawdown time and is sized for the required treatment volume. This project is within NOT a 1 /2 mile of SA waters 2. Stormwater runoff from this project drains to the White Oak River basin. 3. Total Site Area: 11.8 acres 4. Total Wetlands Area: 0 acres 5. 100' Wide Strip of Wetland Area: NA acres (not applicable if no wetlands exist on site) 6. Total Project Area**:7.7 acres 7. Project Built Upon Area: 41 % 8. How many drainage areas does the project have? 3 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 Drainage Area 2 Receiving Stream Name Beaverdam Creek Beaverdam Creek Stream Class & Index No. SB, NSW Index# 19-20-2 SB, NSW Index# 19-20-2 Drainage Area (sf) 146362 55321 Existing Impervious* Area (sf) 0 0 Proposed Impervious*Area (sf) 51836 41817 % Impervious* Area (total) 35% 760% Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (sf) 34800 0 On -site Streets (sf) 0 0 On -site Parking (sf) 0 41817 On -site Sidewalks (sf) 17036 0 Other on -site (sf) 0 0 Off -site (sf) 0 0 Total (sf): 51836 41817 Form SWU-101 Version 8.07 Page 2 of 4 Addendum to Basin Descriptions for Permit Application Basin Information Drainage Area 3 "C" Receiving Stream Name Beaverdam Creek Stream Class S13, NSW Index# 19-20-2 Drainage Area (sf) 57934 Existing Imp. Area (sf) 0 Proposed Imp Area (sf) 44431 % Imp Total 77% Imp Surface Area On -Site Buildings (sf) 0 On -site Streets (sf) 0 On -Site Parking (sf) 44431 On -Site Sidewalks (sf) 0 Other On -site (sf) 0 Off -site (sf) 0 Totall 44431 Impervious- area is defined as the built upon area including, but not lirnited to, buildings, roads, parking areas, sidezealks, gravel areas, etc. **Total project area shall be calculated based on the current policy regarding inclusion of euetlands 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) 733-5083 for the status and availability of these forms. Form SW401-Low Density Form SW401-Curb Outlet System 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.nc.us/su/msi maes.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 ($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 - 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 EI PH Earth Tech Mailing Address: 701 Corporate Ctr. Dr., Suite 475 City:Raleioh State:NC Zip:27607 Phone: (919 ) 854-6252 EmaU:brvan.dick@earthtech.com VIII. APPLICANT'S CERTIFICATION Fax: (919 ) 854-6259 I, (print or type name of person listed in General Information, item 2) Car 1 9a ke ✓ certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be c nstructed in conformance with the approved plans, that the required deed restrictions and protective cove is will be recor d, and that the proposed project complies with the requirements of 15A NCAC 2H .1000. � � A 17 Date: / Z_,e,4 Form SWU-101 Version 8.07 Page 4 of Addendum to Basin Descriptions for Permit Application Basin Information Drainage Area 3 "C" Receiving Stream Name New River Stream Class SB, NSW Drainage Area (sf) 57934 Existing Imp. Area (sf) 0 Proposed Imp Area (sf) 44431 % Imp Total 77% Imp Surface Area On -Site Buildings (sf) 0 On -site Streets (sf) 0 On -Site Parking (sf) 44431 On -Site Sidewalks (sf) 0 Other On -site (sf) 0 Off -site (sf) 0 Totall 44431 P. 01 TRANSACTION REPORT SEP-19-2008 FRI 02:38 PM FOR: NCDENR 910 350 2004 SEND K � DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP SEP-19 02:36 PM 919198546259 1'23" 8 FAX TX OK 227 TOTAL 1M 23S PAGES: 8 State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office Michael F. Easley, Governor FAX COVER SHEET William G. Ross, Jr., Secretary Date: �191`O No. Pages (excl. cover): /y Express Permitting To:� c � �- ' From: Sandra Exum Phone (910) 796-7265 Fax: R Far: (910) 350-2004 A-r' �--t L c�i 127 Cardinal Drive Extension, Wilmington, NC 28405 • (910) 796-7215 • An Equal Opportunity Atfirmalivc Action Employer P, 01 K TRANSACTION REPORT SEP-19-2008 FRI 02:36 PM FOR: NCDENR 910 350 2004 w SEND DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP SEP-19 02:34 PM 919104512927 1'26" 8 FAX TX OK 226 w TOTAL 1M 26S PAGES: 8 State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office Michael F. Easley, Governor William: G. Ross, Jr., Secretary FAX COVE R SHEET Date: -Ll To:,-,/� Co: Fax: Re: Hard copy to follow No. Pages (excl. cover): 1% Express Permitting From: Sandra Exum Phone: (910) 796-7265 Pax: (910)350-2004 127 Ciirdinal Drivc Gxtcnsion, Wilmington, NC 28405 • (910) 796-7215 • An Equal Opportunity Affirmative Action Employef EARTH TECH I AECOM Earth Tech 701 Corporate Center Drive, Suite 475, Raleigh, North Carolina 27607 T 919.854.6200 F 919.854.6259 www.earthtech.aecornxom September 9, 2008 Bryan M. Dick, EIT, PH 701 Corporate Center Dr. Suite 475 Raleigh, NC 27607 919-854-6252 NC DWQ - Express Stormwater Permitting Attn: Malcolm Boney 127 Cardinal Dr. Ext. Wilmington, INC 28405 Re: USMC — Intel : Express Stormwater Application SW8 080734 Mr. Boney, Please find enclosed the check for the response to your RFI dated August 22"d Thank u in advance X /A/, 'a�x' Bryan M. Dick, PH SEP 1 0 7008 104036 Intel - Infiltration Basin A Dmin a Area (Sf) 146362 Imp Area (sf) 51836 A) Drainage Area Ac 3.36 (IA) Imp Fraction 0.35 (Ro)Rainfall Depth Per State SW P(in) 1.5 Step 1: Determine Runoff Volume Simple Method a. Basin FA Rv=.05+.9(IA) V=3630xRDxR xA Post = Rv (post) = .05,9'.67 Rv (pre)=.05+.9'0 V=3630' 1.5'0.37'3.36 Designed By: Date: V (Post) = BMDI 9/4/2008 0.37 0.05 6746 cf Min. Treatment Vol Post - Pre= 6746 cf Treatment Vol in Ac-in 1.86 ac-in Step 2: Determine Surface Area- Min. (K) Infiltration Rate (in/hr 2.16 T Intended Days to Infiltrate (days) 2 a. A - V = A=7039/(2'(2.61'2)) IMin SA of Basin = 780.8 sf 2*(K *T) Step 3. Determine Dimensions Elevation 20.40 18.30 Storage Depth Surface Area Required (Avg of Top and Bottom SA) Top Width ® Storage Elev 49.6 Bottom Width 37 Flow Splider - Inlet Elevation Flow Splimer - Bypass Flow Outlet Too of Berm Elevation Top Length ® Storage Bottom Length 4. Calculation of Volumetric Flow Rate of Infitration and Drawdown 0 from infiltration: '0 is actually the Darcian Flow Rate Q=A (K) Conversion=cfs Example Calculation of Q: Surface Area=4556sf (K)=3.94 in/hr 3.94in Ifr Ihr 4556sf 0.42<fs hr 12 in 3600s Drawdown Time for Treatment Volume E.rampleCalculati(m Q=0.42cfs V=3458cf V 3458ft3 Ls Ihr — = T :. 1 2.Ihrs=.089dap- Q 1 0.42ff' 3600s 2.10 3213 Target Area 3215 sf 79.6 Actual Area Top = 3948 sf 67.0 Actual Area Bottom = 1Av9 2479 sf Surface Area = 3214 sf Volume of Basin De th'SA) = 6749 cf Area (sf) (K) in/hr 0 (infiltration) = 0.12 cfs 2479 2.16 Drawdown Time for Desi n Vol Volume cf 0 Hours Days 6749 0.12 15.1 0.63 RFCFT-%N7F,D till C & 2008 BY:_- --- 104036 Intel - Infiltration Basin B Drain a Area Sf) 55321 Imp Area (at) 41817 (A) Drainage Area (Act 1.269995 0A)Imp Fraction 0.76 (RD)Ralnfall Depth Per State SWP(In) 1.5 Basin B Step 1: Determine Runoff Volume Simple Method a. Rv=.05+.9(IA)=Rv(pos0=.05+.9•.67 By (pre) = .05+.9'0 b V=3630xRoxRl,xA Post V=3630'3.7"0.76'.1.33 Designed By: Date: V (Post) = BMD 9/4/2008 0.73 0.05 5050 cf Min. Treatment Vol(Post -Pre)= 5050 of Treatment Vol in Ac-in 1.39 ac-in Step 2: Determine Surface Area- Min. (K) Infiltration Rate in/hr) 0.85 (T Intended Days to Infiltrate (days) 2 a. V = A=7039/(2'(2.61'2)) 11,11in SA of Basin = 1485.3 sf A = 2*(K*T) Step 3. Determine Dimensions 4.33 -From DWQ Soil Scientist Storage Elevation 20.60 Elevation 18.80 )Iitter - Outlet to Basin Elev. 19.00 Storage Depth Surface Area Required (Avg of Top and Bottom SA) Top Width @ Storage Elev 47.8 Bottom Width 37 Flow Splitter- Inlet Elevation Flow Splitter - Bypass Flow Outlet TOD of Berm Elevation set invert to min of 0.4 above existing Top Length ® Storage Bottom Length 4. Calculation of Volumetric Flow Rate of Infitration and Drawdown 0 from infiltration: '0 is actually the Darcian Flaw Rate Q=A (K) Converrion=cfs Example Calculation of Q: Surface Area=4556s/' (K)=3.94inlhr 3.94in I ft I hr 4556sf =0.42 cfs hr 12 in 3600s Drawdown Time for Treatment Volume Example Calculation: Q=0.42cfs V=3458cf V 3458ft' Is Ihr = 2.Ihrs=.089days Q 1 0.42ft 3600s 1.80 2806 Target Area 2805 at 71.8 Actual Area Top = 3432 sf 61.0 Actual Area Bottom = 225781 1Avg Surface Area = 2845 sf Volume of Basin De th'SA = 5120 cf Area (sf) (K)in/hr D (infiltration) = 0.04 ON 2257 0.85 Drawdown Time for Design Vol Volume cf 0 Hours Da s 5120 0.04 32.0 1 1.33 SEP 0 8 2�08 104036 Intel - Infiltration Basin C Drain a Area Sf 57934 Imp Area (sf) 44431 (A) Drainage Area (Ac) 1.329982 (Iq) Imp Fraction 0.77 (RD)Ralnfall Depth Per State SWP(in) 1.5 Step 1: Determine Runoff Volume Simple Method Basin C_- Rv = .05 +.9(I,t ) V=3630xR xR xA Post = Rv (pos) = .05+.9'.67 Rv (pre)=.05+.9.0 V=3630'3.7'0.76 -1.329 Designed By: Date: V (Post) _ BMD 9/4/2008 0.74 0.05 5361 cf Min. Treatment Vol(Post -Pre)= 5361 cf Treatment Vol in Ac-in 1.48 ac-in Step 2: Determine Surface Area. Min. (K) Infiltration Rate in/hr 1.7 (1) Intended Days to Infiltrate (days) 2 a. V = A=7039/(2'(2.61'2)) IMin SA of Basin = 788.3 sf A = 2*(K7*T Step 3. Determine Dimensions Depth to Exist grount to SHWT (h) 4.33 -From DWO Soil Scientist Approved Depth Existing Ground Elevation 21.50 Bypass Weir Elevation Design Storage Elevation 20.80 Flow Splitter- Inlet Elevation Bottom Elevation 19.30 Flow Splitter - Bypass Flow Outlet Flow Spliner - Outlet to Basin Elev. 19.50 Top of Berm Elevation Max Excavation Depth 2.33 ' Must set invert to min of 0.4 above existing Storage Depth Surface Area Required (Avg of Top and Bottom SA) Top Width @ Storage Elev, 49 Top Length ® StoragE Bottom Width 40 Bottom Length 4. Calculation of Volumetric Flow Rate of Infitration and Drawdown D from infiltration: 'O is actually the Darcian Flow Rate Q=A (K) Conversion=cfs ExampleCaladation of Q: Surface Area=4556sf (K)=3.94m1hr 3.94in I ft Ihr 45%sf 0.42cfs hr 12in 3600s Drawdown Time for Treatment Volume ETampleCalculation Q=0.42cfs V=3458cf V =T . 3458ft' Is Ihr =2 1hrs=.089days Q 1 0.42 ft' 3600.s 1.50 3574 Target Area 3575 sf 87.0 Actual Area Top = 426381 78.0 Actual Area Bottom = 1Av9 3120 at 80 Surface Area = 3692 at Volume of Basin (Depth -SA) = 5537 cf Area (sf) (K) in/hr D (infiltration)= 0.12 cfs 3120 1.7 Drawdown Time for Desi n Vol Volume cf O Hours Da s 5537 0.12 12.5 0.52 SEF 0 8 2008 EARTH TECH I AECOM Earth Tech 701 Corporate Center Drive, Suite 475, Raleigh, North Carolina 27607 T 919.854.6200 F 919.854.6259 www.earthtech.aecom.com September 4, 2008 Bryan M. Dick, EIT, PH 701 Corporate Center Dr. Suite 475 Raleigh, NC 27607 919-854-6252 NC DWQ - Express Stormwater Permitting Attn: Malcolm Boney 127 Cardinal Dr. Ext. Wilmington, NC 28405 Re: USMC — Intel : Express Stormwater Application SW8 080734 Mr. Boney, Please find enclosed the updates to the stormwater management plan for the intel site. We addressed your comments in the August 22nd RFI from you with the following changes: 1. 1 amended the sample calculation that was given for basin B and C to reflect the correct area. The original calculation itself was already using the proper area to calculate the volume, but the sample calc had a typo. This had no affect on the basins in any way. 2. I removed the calculation of pre -development runoff which resulting in an increase in required basin storage by that amount (about 300 cf on each basin). The basin storage elevations and bypass weir elevations were adjusted to accommodate additional needed storage. The footprint of the basins did not change. This was done for all 3 basins. 3. Changes to basin volume resulted in changes to the supplement, specifically, storage required, storage provided, storage elevation, storage SA, drawdown time and ac-in treated. 4. A $500.00 check will follow in a separate fedex package. I have included the updated plan sheets, updated supplement forms and updated basin calculations, which accounts for all of the documents that have changed from the previous submittal. Please give me a call if you have any questions or comments. Thank you in advance Bryan M. Dick, PH 5E? 0 9 2008 P w wnr i � O�QF F9oG Michael P. Easley, Governor .,� William G. Ross Jr., Secretary rNorth Carolina Department or Environment and Natural Resources > 1 (] Y Coleco 11. Sullins Director Division of Water Quality August 22, 2008 Intel BN Interim Facilities Camp Lejeune 1005 Michael Rd. Camp Lejeune, NC 28547-2521 Subject: Request for Additional Information Stormwater Project No. SW8 080734 Intel BN Interim Facilities Onslow County Dear Mr. Baker: The Wilmington Regional Office received a State Stormwater Management Permit Application for Intel BN Interim Facilities on August 13, 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: For Basin B and C, use the appropriate drainage areas in the volume formula. 1.26 acres appears to be the area for Basin B and 1.33 acres appears to be the area for Basin C. 2. The requirement to calculate volume based on the difference between the pre and post development volume is not applicable for this project because it does not drain to SA waters. Please calculate the minimum storage volume based on post -development condition for the 1.5-inch storm. Please note that a revision to one number may have a domino effect on other numbers, which may require revision of the applications, calculations, supplements, plans, details, and associated documentation. Please verify all numbers are correct to ensure consistency in the application documents. 4. Please submit a $500 fee for the additional review required for this application. 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 September 3, 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. If you need additional time to submit the information, please mail, email or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 30 days from the receipt of a completed application to issue the permit. 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. N i `hcarolina ,Naturally North Carolina Division of Watcr Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www.newalerquality org Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer — 50 % Recycled110 % Post Consumer Paper Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 796-7215 or email me at malcolm.boney@ncmail.net. Sincerely, Atpi" Malcolm Boney Environmental Engineer II ENB/mb: S:\WQS\STORMWATER\ADDINFO\2008\080734 CC: Bryan Dick, Earth Tech Malcolm Bonet' CWilmingtori Reg ion a I -Office,' RE: Intel Project at Camp Lejeune Subject: RE: Intel Project at Camp Lejeune From: "Towler CIV David W" <david.towler « usmc.mil> Date: Wed, 23 Jul 2008 13:24:31 -0400 To: "Janet Russell' <Janet.RusseII@ncmai1.net>, <bryan.dick@earthtech.com>, 'Baker CIV Carl H" <carl.h.baker@usmc.mi I> The Base will be there. V/r, David W. Towler, EI Marine Corps Base, Camp Lejeune Civil Engineer Public Works Division, Bldg 1005 Civil Design Branch Phone: (910) 451-3238 ext. 254 -----Original Message ----- From; Janet Russell[mailto:Janet.Russell@ncmail.net] Sent: Wednesday, July 23, 2006 11:35 To: bryan.dick@earthtech.com; Baker CIV Carl H; Towler CIV David W Subject: Intel Project at Camp Lejeune July ,23, 2006 *Intel OSMC k Gentlemen: The Express stormwater submittal meeting for the Intel project has been scheduled with *Malcolm Boney on July 30, 2008 at 11:00 AM *here in the Wilmington Regional Office. The applicant is required to attend the meeting. Please review the submittal requirements, attached. Please respond within 2 business days to confirm and reserve the submittal meeting time / date. Thank you, Janet Russell Express Coordinator I of 1 7/23/2008 4:45 PM RE: Intel Project at Camp Lejeune Subject: RE: Intel Project at Camp Lejeune From: "Dick, Bryan" <Bryan. Dick@earthtech. com> Date: Wed, 23 Jul 2008 11:46:23 -0400 To: "Janet Russell' <Janet.Russel I@ncmai1.net> That date is confirmed. Thanks 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, July 23, 2008 11:35 AM To: Dick, Bryan; Baker CIV Carl H; Towler GS05 David W Subject: Intel Project at Camp Lejeune July 23, 2008 *Intel USMC * Gentlemen: The Express stormwater submittal meeting for the Intel project has been scheduled with *Malcolm Boney on July 30, 2008 at 11:00 AM *here in the Wilmington Regional Office. The applicant is required to attend the meeting. Please review the submittal requirements, attached. Please respond within 2 business days to confirm and reserve the submittal meeting time / date. Thank you, Janet Russell Express Coordinator I of 1 7/23/2008 11:51 AM aboutblank July 23, 2008 Intel USMC Gentlemen: The Express stormwater submittal meeting for the Intel project has been scheduled with Malcolm Boney on July 30, 2008 at 11:00 AM here in the Wilmington Regional Office. The applicant is required to attend the meeting. Please review the submittal requirements, attached. Please respond within 2 business days to confirm and reserve the submittal meeting time / date. Thank you, Janet Russell Express Coordinator I of 1 7/23/2008 11:34 AM RE: Intel - USMC Subject: RE: Intel - USMC From: "Dick, Bryan" <Bryan.Dick cr earthtech.com> Date: Mon, 21 Jul 2008 22:04:24 -0400 To: "Janet Russell" <Janet.Russel l a ncmai1.net> Hi Janet. He looked at this site in April when he denied the AAV site and confirmed the Recon site, all the same day. I confirmed this with him after the SMTC visit last month and he indicated that since I placed the basins where he suggested, that Intel was approved. He said he was sending the request form, approved, to ya'll. I have a copy of the request form, but not a copy of the one that he took notes on.. Let me know what I need to do to help you locate it. I am in Michigan till wednesday but will be on email in the evenings. thanks Bryan From: Janet Russell[mailto:Janet.Russell@ncmail.net] Sent: Mon 7/21/2008 1:24 PM To: Dick, Bryan Subject: Intel - USMC Bryan, has Vincent Lewis, our soil scientist, been out to the site to confirm the seasonal high water table depths? I know he went to the Special Mission Training Center SMTC on Birch Drive. If he didn't look at the proposed infiltration areas for this project, we need to get him to. Janet 1 of 1 7/22/2008 8:30 AM c5W g O8U1�3� North Carolina Department of Environment and TA Natural Resources NCDENR Request for Express Permit Review FILL-IN all the Informal Coordinator along with of the project location. • Asheville Region -Alison Davidson 828-296-4698;allson.davldsonidncmall.net • Fayetteville or Raleigh Region -David Lee 919-791-4203; david.lee®ncmall.net • Mooresville & -Patrick Grogan 704-6633772 or patrick.orooanifilncmail.net • Washington Region -Lyn Hardison 252-946-9215 or 1 nn.hardison(dncmall.net • Wilmington Region -Janet Russell 910-350.2004 or ianet.russelKdncmall.net NOTE: Project application received after 12 noon will be stamped in the following work day. For DENR Use ONLY Revimver:_M_ Submit Timo'. w. �qqq Confirm 1�\ -23 __ Deleted: I fed In the application Package Deleted:I Project Name: t48AM--UlF66% County: ONSLOW T^At—k 3tJ -X,nr'(r�'N, Applicant: ARL BAKER, DEPUTY PUBLIC WORKS OFFICER Company: MCB CAMP LEJEUNE Address: BLDG 1005 MICHAEL RD. City: MCB CAMP LEJEUNE State: NC Zip:-285472521 Phone:910-451-2213 Fax: Email: car(h.baker0usmc.mil Project is Drains into SB. NSW waters Project Located in WHITE OAK River Basin Engineer/Consultant: Bryan M. Dick Company: Earth Tech Address: 701 COPORATE CENTER DR. City: RALEIGHStale: NC Zip: 27607 259 Phone: 919.854-6252 Fax: :919-854-6Email: bryan.dic4a).amail.com (Check all that apply) K � +-t.v ';� 5 I, - qY' C—\'-t TlC. S ❑ Scoping Meeting ONLY ❑ DWO, ❑ DCM, ❑ DLR, ❑ OTHER: _ ❑ Stream Origin Determination: # of stream calls — Please attach TOPO map marking the areas in questions ® State Stormwater ❑ General ❑ SFR, DBkhd & Bt Rmp, ❑ Clear & Grub, 0 Udlity ❑ Low Density ❑ Low Density -Curb & Gutter _ # Curb Outlet Swales ❑ Ott -site [SW _(Provide permit #)I ❑ High Density -Detention Pond _ # Treatment Systems ® High Density. I nfi ltration 3 #Treatment Systems ❑ High Density -Bio-Retention _ # Treatment Systems ❑ High Density —Constructive Wetlands _ # Treatment Systems ❑ High Density -Other _ # Treatment Systems ❑ MODIFICATION SW— (Provide permit #) ❑ Coastal Management ❑ Excavation & Fill , ❑ Bridges & Culverts ❑ Structures Information ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront ❑ Land Quality ❑ Erosion and Sedimentation Control Plan with —acres to be disturbed.(CK #_ (for DENR use)) WETLANDS QUESTIONS MUST BE ADDRESSED BELOW ❑ Wetlands (401): Check all that apply Isolated wetland on Property ❑ Yes ❑ No Wetlands on Site ❑ Yes ❑ No Buffer Impacts: ❑ No ❑ YES: acre(s) Wetlands Delineation has been completed: ❑ Yes ❑ No Minor Variance: ❑ No ❑ YES US ACOE Approval of Delineation completed: ❑ Yes ❑ No Major General Variance ❑ No ❑ YES 404 Application in Process w1 US ACOE: ❑ Yes ❑ No 401 Applicalion required: ❑Yes ❑ No If YES, ❑ Regular Permit Received from US ACOE ❑ Yes ❑ No Perennial, Blue line stream, etc on site ❑ yes ❑ No For DENR use only Fee Split for multiple permits: (Check # 1 Total Fee Amount $ SUBMITTAL DATES Fee SUBMITTAL DATES 1 Fee LAMA $ Variance Mai; Min) $ SW 0 HD, 0 LD ❑ Gen $ 401: 1 1 1$ LDS 1 $ Stream Deter,_ $ (1E C E I V ED JUL 2 1 2008 DWQ PROJ # Intel Stormwater Express Permit Meeting Request Subject: Intel Stormwater Express Permit Meeting Request From: "Dick, Bryan" <Bryan.Dick@earthtech.com> Date: Sun, 20 Jul 2008 16:54:07 -0400 To: "Janet Russell" <Janet.Russell n ncmail.net> CC: "Gleason, Sean" <Sean.Gleason@earthtech.com>, 'Burnet, Gil" <gil.bumet a carthtcch.com>, <brian.marshburn@usmc.mil>, "Towler GS05 David W" <david.towler@usmc.mil> Janet, I have attached an express permit request form, along with supporting documents. Please let me know of available meeting dates on or after Friday, 7/25. Thanks in advance 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 Content -Description: Express Permit Request 104036 Packett.pdf Express Permit Request 104036 Packett.pdf Content -Type: application/octet-stream Content -Encoding: base64 R ECEIVED JUL 2 1 2008 DWQ PROJ # I of 1 7/21/2008 8:23 AM Stormwater Management Plan Prepared For: MCB Camp Lejeune Intel Date: 7-17-08 0P (N%I!i°� O;•�FESS/0;•. y9 "Q SEAL 028399 ?/z-8(o8 Earth Tech, Inc 701 Corporate Center Dr., Suite 475 Raleigh, NC 27607 919-854-6200 Prepared By: Bryan M. Dick, EIT, PH / 4U6 C 6 Zp08 n.. Checked By: Sean Gleason, PE f Proiect Description This document is to serve as a stormwater management plan for the MCB Camp Lejeune — Intel project. The project consists of the addition 29 temporary trailers, pavement and sidewalks to the undeveloped site. The completed project will provide for expansion of base facilities to accommodate additional staff in the coming year. Contact Information Earth Tech. Inc. Attn: Bryan M. Dick, PH 701 Corporate Center Dr., Suite 475 Raleigh, NC 27607 Telephone: 919-854-6252 Fax: 919-854-6259 Identify Project Involvement This project is a part of the White Oak River Basin, and is currently not subject to any buffer rules. The site is approximately 2,700 feet from the New River approximately 3.5 miles from the Camp Lejeune Main Gate The proposed project stormwater plan will meet the requirements of retaining the runoff volume the 1.5 inch rainfall event per the requirements by the State as referenced from the DWQ Stormwater Manual, July 2007. Three infiltration basins are used to treat three drainage areas and one level spreader treats the bypass flow. This project is not within 0.5 miles of SA waters and infiltration devices are not required by DWQ. The treatment volume provided as well as the use of swales and adequate infiltration capacity will provide a post development peak flow rate that is less than the pre - development condition, per the July 2007 start date for meeting Phase II requirements. Hydrocad models bases on TR-55 methods were used to validate the complete capture of the runoff difference for the 1.5" Type III — 24 Hr. storm. Stormwater Design Parameters The infiltration basins are based on the following parameters or objectives: • Provide 85% TSS removal Protect the value of the receiving water resource 1.5" rainfall for basin storage sizing The 1 yr rainfall for outlet structure and routing design to maintain a post development peak flow that is less than pre -development peak flow Ratio of impervious surface to the total area of the drainage area Exceed a minimum of 2.0' clearance from the seasonal high water table Rainfall exceeding the design storm will bypass the basins and flow through minimum of 50' long vegetated filter Discussion of Treatment Measures The proposed treatment is to use three infiltration basins to meet the TSS and Peak Flow requirements set forth by DWQ. The soils of the project site are appropriate soils for infiltration and the seasonal high water table at the site will allow construction of the basins with at least a 2' of clearance. Bypass devices are provided to allow any runoff volume that exceeds the design storage volume to be routed to a level spreader with a vegetated filter strip. The level spreader length is designed to handle the 10 yr peak runoff rate, so no bypass of the filter is necessary. Phase II requirements are met by using a grassed swale to collect sheet flow from the impervious areas and by the infiltration and storage volume provided in each basin. Conclusion This Stormwater Management Plan represents an environmentally sensitive and effective plan for utilizing the proposed stormwater treatments to accommodate the increased runoff of the proposed site development. m Jacksonville sp"e?,PNORJe mG Camp Lejeune Main Gate 13, ^'..� w ERASER ROAD ti �F,,, "r Ylfley l7lel'll � , (D P a y ra . ✓lF O.pLF , BREWSTER BOULEVARD O: 4�+" w NC ROVTE24 `S f �P z o w BIRCH C "< �O. oAo1 Intel Site Location �o JERONA �OOp. R.�J R7UfROAO �O Y t 4' NGy _ 7i �f \ .. PF Camp Lejeune South Gate % �� Q l�po / o Sneads Ferry i Legend E �arthTech Location Map — PAVED 0 05 1 2 �. Wes A �l�CO m!nnanmm ua. Camwny UNPAVED MilIntel Site Camp Lejeune MCB Onslow County, NC Legend Initial Site Layout = EarthTech Sons Map Existing Roads Intel Site — PAVED Atyca ilt. 6.0 ud c�mpe"r Camp Lejeune Marine Corps Base UNPAVED Onslow County, North Carolina Soil Map Units o 125 250 500 Feet 1 inch equals 250 feet laa; 000' l slenbe yow 1 laai 000'Z 0001 009 0 euilaeo WON 'AlunoZ) Molsuo aseg sdjoo auuew ounafal dweo ails lalul deW uof;eogisselo DMa pue spueI;aM hedwoo pll ewle.14p, Oahj V u�alu�ae3 Cs a3AVdNn 03AVd — speoa 6upslx3 ONVl13M,-1 aNvldn,-1 souelnquy paweuun sweai7S paweN OMo— lnoFel opS Ieillul pua6a-j Page I of 2 CLJN.CLJN.jurisdictional_wetland_area SDE Feature Class Description I Spatial I Attributes Keywords Theme: Wetlands Area, Location Place: Camp Lejeune Stratum: wetlands, planning, jurisdictional Temporal: None Description Abstract CUN.CUN.jurisdictional_wetland—area contains polygons representing wetlands created from the Jurisdictional Wetlands obtained from field survey and approved by the Corps of Engineers, Wilmington, NC. Purpose Provide wetlands identification as it relates to planning, construction siting and management tasks. Supplementary Information CUN.CUN.jurisdictional_wetland_area created from feature class CUN . CU N. wetla nd_a rea New feature class 2006 Status of the data Complete - Last Reviewed: 10/17/06 Data update frequency: As needed Time period for which the data is relevant Date and time: 2005 Description: REQUIRED: The basis on which the time period of content information is determined. Publication Information Who created the data: I&E/EMD/ECON Date and time: REQUIRED: The date when the data set is published or otherwise made available for release. Data storage and access information File name: CUN.CUN.jurisdictional_wetland_area £le://C:\Documents and Settings\Ian.Jewell\Local Settings\Temp\metadata3.htm 2/8/2008 Page 2 of 2 Type of data: vector digital data Location of the data: . \\mcbclnasOl \GIS_User_Storage\Lejeune\BLSD\GIS\ECRGCInstallationData\Lejeu ne\DataReq uests\: \081007 Earth Tech\New Personal Geodatabase.mdb Data processing environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 1; ESRI ArcCatalog 9.1.0.780 Constraints on accessing and using the data Details about this document Contents last updated: 20070814 at time 09133300 Who completed this document Standards used to create this document file://CADocuments and Settings\lan.Jewel l\Local Settings\Temp\metadata3.htm 2/8/2008 Pre -development 9 Reach Aon Link 103543 Intel Basin A- Pre Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 2 HydroCAD®8 00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Subcatchment 1S: Pre -development Runoff = 0.05 cfs @ 13.58 hrs, Volume= 0.031 af, Depth> 0.11" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 yr Rainfall=3.70" Area (sf) CN Description 146,362 45 Woods, Poor, HSG A 146,362 Pervious Area Tc Length Slope Velocity min) (feet) (f /ft) (fUsec) 40.6 188 0.0120 0.08 N 0.035 0.03 c 0.025 0.02 0.015 0.01 Description Sheet Flow, sheet flow forest Woods: Light underbrush n= 0.400 P2= 3.70" Subcatchment 1S: Pre -development Hydrograph 0.05 cfs -Type II 24-hr 1 yr Rainfall=3.70" Runoff Area=146,362;sf Runoff Volume=0.031 of Runoff Depth>0:11" Flow Length=188' Slope=0.0120 T Tc=40.6 min CN=45 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) 0 Runoff Post -development 2P Infiltration Basin A 9 Reach Aon Link 103543 Intel Basin A- Post Type 11 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 2 HydroCAD@ 8.00 s/n 003562 @ 2006 HydroCAD Software Solutions LLC 7/20/2008 Pond 2P: Infiltration Basin A Inflow Area = 3.360 ac, Inflow Depth = 0.81" for 1 yr event Inflow = 0.88 cfs @ 13.15 hrs, Volume= 0.226 of Outflow = 0.12 cfs @ 12.36 hrs, Volume= 0.226 af, Atten= 86%, Lag= 0.0 min Discarded = 0.12 cfs @ 12.36 hrs, Volume= 0.226 of Routing by Star -Ind method, Time Span= 0.00-96.00 hrs, dt= 0.01 hrs Peak Elev= 19.88' @ 18.74 hrs Surf.Area= 0 sf Storage= 4,953 cf Plug -Flow detention time= 459.0 min calculated for 0.226 of (100% of inflow) Center -of -Mass det. time= 459.0 min ( 1,418.0 - 959.1 ) Volume Invert Avail Storage Storage Description #1 18.30' 5,960 cf Custom Stage Data Listed below Elevation Cum.Store (feet) (cubic -feet) 18.30 0 20.20 5,960 Device Routing Invert Outlet Devices #1 Discarded 0.00' 0.12 cfs Exfiltration at all elevations Discarded OutFlow Max=0.12 cfs @ 12.36 hrs HW=18.32' (Free Discharge) t1=Exfiltration (Exfiltration Controls 0.12 cfs) 103543 Intel Basin A- Post Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 3 HydroCAD®8 00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Pond 2P: Infiltration Basin A Hydrograph Inflow. 1 ac 0.8 j .. • • • 1 .� 0'D 0 G/ i ,4 j 1/ 1 1 p 0 5 1015 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Time (hours) © Inflow ❑p Discarded 103543 Intel Basin A- Post Type 11 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 4 HydroCAD®8 00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Hydrograph for Pond 2P: Infiltration Basin A Time Inflow Storage Elevation Discarded (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 18.30 0.00 2.00 0.00 0 18.30 0.00 4.00 0.00 0 18.30 0.00 6.00 0.00 0 18.30 0.00 8.00 0.00 0 18.30 0.00 10.00 0.00 0 18.30 0.00 12.00 0.02 2 18.30 0.00 14.00 0.51 3,346 19.37 0.12 16.00 0.20 4,673 19.79 0.12 18.00 0.13 4,939 19.87 0.12 20.00 0.10 4,913 19.87 0.12 22.00 0.08 4,700 19.80 0.12 24.00 0.08 4,406 19.70 0.12 26.00 0.01 3,887 19.54 0.12 28.00 0,00 3,045 19.27 0.12 30.00 0.00 2,181 19.00 0.12 32.00 0.00 1,317 18.72 0.12 34.00 0.00 453 18.44 0.12 36.00 0.00 0 18.30 0.00 38.00 0.00 0 18.30 0.00 40.00 0.00 0 18.30 0.00 42.00 0.00 0 18.30 0.00 44.00 0.00 0 18.30 0.00 46.00 0.00 0 18.30 0.00 48.00 0.00 0 18.30 0.00 50.00 0.00 0 18.30 0.00 52.00 0.00 0 18.30 0.00 54.00 0.00 0 18.30 0.00 56.00 0.00 0 18.30 0.00 58.00 0.00 0 18.30 0.00 60.00 0.00 0 18.30 0.00 62.00 0.00 0 18.30 0.00 64.00 0.00 0 18.30 0.00 66.00 0.00 0 18.30 0.00 68.00 0.00 0 18.30 0.00 70.00 0.00 0 18.30 0.00 72.00 0.00 0 18.30 0.00 Time Inflow Storage Elevation Discarded (hours) (cfs) (cubic -feel) (feel) (cfs) 74.00 0.00 0 18.30 0.00 76.00 0.00 0 18.30 0.00 78.00 0.00 0 18.30 0.00 80.00 0.00 0 18.30 0.00 82.00 0.00 0 18.30 0.00 84.00 0.00 0 18.30 0.00 86.00 0.00 0 18.30 0.00 88.00 0.00 0 18.30 0.00 90.00 0.00 0 18.30 0.00 92.00 0.00 0 18.30 0.00 94.00 0.00 0 18.30 0.00 96.00 0.00 0 18.30 0.00 103543 Intel Basin A- Post Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 5 HydroCADO 8.00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Elevation Discarded (feet) (cfs) 18.30 0.00 18.31 0.12 18.32 0.12 18.33 0.12 18.34 0.12 18.35 0.12 18.36 0.12 18.37 0.12 18.38 0.12 18.39 0.12 18.40 0.12 18.41 0.12 18.42 0.12 18.43 0.12 18.44 0.12 18.45 0.12 18.46 0.12 18.47 0.12 18.48 0.12 18.49 0.12 18.50 0.12 18.51 0.12 18.52 0.12 18.53 0.12 18.54 0.12 18.55 0.12 18.56 0.12 18.57 0.12 18.58 0.12 18.59 0.12 18.60 0.12 18.61 0.12 18.62 0.12 18.63 0.12 18.64 0.12 18.65 0.12 18.66 0.12 Stage -Discharge for Pond 213: Infiltration Basin A Elevation Discarded (feet) (cfs) 18.67 0.12 18.68 0.12 18.69 0.12 18.70 0.12 18.71 0.12 18.72 0.12 18.73 0.12 18.74 0.12 18.75 0.12 18.76 0.12 18.77 0.12 18.78 0.12 18.79 0.12 18.80 0.12 18.81 0.12 18.82 0.12 18.83 0.12 18.84 0.12 18.85 0.12 18.86 0.12 18.87 0.12 18.88 0.12 18.89 0.12 18.90 0.12 18.91 0.12 18.92 0.12 18.93 0.12 18.94 0.12 18.95 0.12 18.96 0.12 18.97 0.12 18.98 0.12 18.99 0.12 19.00 0.12 19.01 0.12 19.02 0.12 19.03 0.12 Elevation Discarded (feet) (cfs) 19.04 0.12 19.05 0.12 19.06 0.12 19.07 0.12 19.08 0.12 19.09 0.12 19.10 0.12 19.11 0.12 19.12 0.12 19.13 0.12 19.14 0.12 19.15 0.12 19.16 0.12 19.17 0.12 19.18 0.12 19A9 0.12 19.20 0.12 19.21 0.12 19.22 0.12 19.23 0.12 19.24 0.12 19.25 0.12 19.26 0.12 19.27 0.12 19.28 0.12 19.29 0.12 19.30 0.12 19.31 0.12 19.32 0.12 19.33 0.12 19.34 0.12 19.35 0.12 19.36 0.12 19.37 0.12 19.38 0.12 19.39 0.12 19.40 0.12 Elevation Discarded (feet) (cfs) 19.41 0.12 19.42 0.12 19.43 0.12 19.44 0.12 19.45 0.12 19.46 0.12 19.47 0.12 19.48 0.12 19.49 0.12 19.50 0.12 19.51 0.12 19.52 0.12 19.53 0.12 19.54 0.12 19.55 0.12 19.56 0.12 19.57 0.12 19.58 0.12 19.59 0.12 19.60 0.12 19.61 0.12 19.62 0.12 19.63 0.12 19.64 0.12 19.65 0.12 19.66 0.12 19.67 0.12 19.68 0.12 19.69 0.12 19.70 0.12 19.71 0.12 19.72 0.12 19.73 0.12 19.74 0.12 19.75 0.12 19.76 0.12 19.77 0.12 Elevation Discarded (feet) (cfs) 19.78 0.12 19.79 0.12 19.80 0.12 19.81 0.12 19.82 0.12 19.83 0.12 19.84 0.12 19.85 0.12 19.86 0.12 19.87 0.12 19.88 0.12 19.89 0.12 19.90 0.12 19.91 0.12 19.92 0.12 19.93 0.12 19.94 0.12 19.95 0.12 19.96 0.12 19.97 0.12 19.98 0.12 19.99 0.12 20.00 0.12 20.01 0.12 20.02 0.12 20.03 0.12 20.04 0.12 20.05 0.12 20.06 0.12 20.07 0.12 20.08 0.12 20.09 0.12 20.10 0.12 20.11 0.12 20.12 0.12 20.13 0.12 20.14 0.12 Elevation Discarded (feet) (cfs) 20.15 0.12 20.16 0.12 20.17 0.12 20.18 0.12 20.19 0.12 20.20 0.12 Pre -development Subcat Reach Aon �IfliC 103543 Intel Basin B- Pre Type 1124-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 2 HydroCAD@ 8.00 s/n 003562 @ 2006 HydroCAD Software Solutions LLC 7/20/2008 Subcatchment 1S: Pre -development Runoff = 0.02 cfs @ 14.52 hrs, Volume= 0.012 af, Depth= 0.12" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-96.00 hrs, dt= 0.01 hrs Type II 24-hr 1 yr Rainfall=3.70" Area (sf) CN Description 55,321 45 Woods, Poor HSG A 55,321 Pervious Area Tc Length Slope Ve Description 87.7 318 0.0050 0.06 Sheet Flow, sheet flow woods Woods: Light underbrush n= 0.400 P2= 3.70" Subcatchment 1S: Pre -development Hydrograph 0.018: ' 0.02 cfs 0.016: Type II 24-hr 1 yr Rainfa11=3.70" 0.014= Runoff Area=55,321 sf 0.012= Runoff Volume=0.012'af Runoff Depth=0.12" 0.01 3 Flow Length=318' ; 2 0.008' :Slope=0.0050:'/' 0.006= Tc=87.7 min CN=45 0.004' 0.0027 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Time (hours) p Runoff 1S Post -develop Infiltration Basin B Subcat Reach Aon �IfliC 103543 Intel Basin B- Post Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 2 HydroCAD@ 8.00 s/n 003562 @ 2006 HydroCAD Software Solutions LLC 7/20/2008 Pond 2P: Infiltration Basin B Inflow Area = 1.270 ac, Inflow Depth = 2.19" for 1 yr event Inflow = 5.08 cfs @ 11.96 hrs, Volume= 0.232 of Outflow = 0.04 cfs @ 10.14 hrs, Volume= 0.232 af, Atten= 99%, Lag= 0.0 min Discarded = 0.04 cfs @ 10.14 hrs, Volume= 0.232 of Routing by Stor-Ind method, Time Span= 0.00-96.00 hrs, dt= 0.01 hrs Peak Elev= 21.36' @ 24.04 hrs Surf.Area= 0 sf Storage= 7,937 cf Plug -Flow detention time= 1,831.1 min calculated for 0.232 of (100% of inflow) Center -of -Mass det. time= 1,831.3 min ( 2,647.0 - 815.8 ) Volume Invert Avail Storage Storage Description #1 18.80, 8,460 cf Custom Stage Data Listed below Elevation Cum.Store (feet) (cubic -feet) 18.80 0 20.50 4,775 21.50 8,460 Device Routing Invert Outlet Devices #1 Discarded 0.00' 0.04 cfs Exfiltration at all elevations Qiscarded OutFlow Max=0.04 cfs @ 10.14 hrs HW=18.83' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.04 cfs) 103543 Intel Basin B- Post Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 3 HydroCAD®8 00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Pond 2P: Infiltration Basin B Hydrograph 1: 0 0. . .. - .1. 1 :1: •1• ❑p Inflow ❑ Discarded 103543 Intel Basin B- Post Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 4 HydroCAD®8 00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Hydrograph for Pond 2P: Infiltration Basin B Time Inflow Storage Elevation Discarded (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 18.80 0.00 2.00 0.00 0 18.80 0.00 4.00 0.00 0 18.80 0.00 6.00 0.00 0 18.80 0.00 8.00 0.01 10 18.80 0.01 10.00 0.05 69 18.82 0.04 12.00 4.33 3,971 20.21 0.04 14.00 0.15 6,697 21.02 0.04 16.00 0.10 7,295 21.18 0.04 18.00 0.07 7,615 21.27 0.04 20.00 0.05 7,792 21.32 0.04 22.00 0.05 7,878 21.34 0.04 24.00 0.05 7,936 21.36 0.04 26.00 0.00 7,661 21.28 0.04 28.00 0.00 7,373 21.20 0.04 30.00 0.00 7,085 21.13 0.04 32.00 0.00 6,797 21.05 0.04 34.00 0.00 6,509 20.97 0.04 36.00 0.00 6,221 20.89 0.04 38.00 0.00 5,933 20.81 0.04 40.00 0.00 5,645 20.74 0.04 42.00 0.00 5,357 20.66 0.04 44.00 0.00 5,069 20.58 0.04 46.00 0.00 4,781 20.50 0.04 48.00 0.00 4,493 20.40 0.04 50.00 0.00 4,205 20.30 0.04 52.00 0.00 3,917 20.19 0.04 54.00 0.00 3,629 20.09 0.04 56.00 0.00 3,341 19.99 0.04 58.00 0.00 3,053 19.89 0.04 60.00 0.00 2,765 19.78 0.04 62.00 0.00 2,477 19.68 0.04 64.00 0.00 2,189 19.58 0.04 66.00 0.00 1,901 19.48 0.04 68.00 0.00 1,613 19.37 0.04 70.00 0.00 1,325 19.27 0.04 72.00 0.00 1,037 19.17 0.04 Time Inflow Storage Elevation Discarded (hours) (cfs) (cubic -feet) (feet) (cfs) 74.00 0.00 749 19.07 0.04 76.00 0.00 461 18.96 0.04 78.00 0.00 173 18.86 0.04 80.00 0.00 6 18.80 0.00 82.00 0.00 0 18.80 0.00 84.00 0.00 0 18.80 0.00 86.00 0.00 0 18.80 0.00 88.00 0.00 0 18.80 0.00 90.00 0.00 0 18.80 0.00 92.00 0.00 0 18.80 0.00 94.00 0.00 0 18.80 0.00 96.00 0.00 0 18.80 0.00 103543 Intel Basin B- Post Type 11 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 5 HydroCADO 8.00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Elevation Discarded (feet) (cfs) 18.80 0.00 18.82 0.04 18.84 0.04 18.86 0.04 18.88 0.04 18.90 0.04 18.92 0.04 18.94 0.04 18.96 0.04 18.98 0.04 19.00 0.04 19.02 0.04 19.04 0.04 19.06 0.04 19.08 0.04 19.10 0.04 19.12 0.04 19.14 0.04 19.16 0.04 19.18 0.04 19.20 0.04 19.22 0.04 19.24 0.04 19.26 0.04 19.28 0.04 19.30 0.04 19.32 0.04 19.34 0.04 19.36 0.04 19.38 0.04 19.40 0.04 19.42 0.04 19.44 0.04 19.46 0.04 19.48 0.04 19.50 0.04 19.52 0.04 Stage -Discharge for Pond 2P: Infiltration Basin B Elevation Discarded (feet) (cfs) 19.54 0.04 19.56 0.04 19.58 0.04 19.60 0.04 19.62 0.04 19.64 0.04 19.66 0.04 19.68 0.04 19.70 0.04 19.72 0.04 19.74 0.04 19.76 0.04 19.78 0.04 19.80 0.04 19.82 0.04 19.84 0.04 19.86 0.04 19.88 0.04 19.90 0.04 19.92 0.04 19.94 0.04 19.96 0.04 19.98 0.04 20.00 0.04 20.02 0.04 20.04 0.04 20.06 0.04 20.08 0.04 20.10 0.04 20.12 0.04 20.14 0.04 20.16 0.04 20.18 0.04 20.20 0.04 20.22 0.04 20.24 0.04 20.26 0.04 Elevation Discarded (feet) (cfs) 20.28 0.04 20.30 0.04 20.32 0.04 20.34 0.04 20.36 0.04 20.38 0.04 20.40 0.04 20.42 0.04 20.44 0.04 20.46 0.04 20.48 0.04 20.50 0.04 20.52 0.04 20.54 0.04 20.56 0.04 20.58 0.04 20.60 0.04 20.62 0.04 20.64 0.04 20.66 0.04 20.68 0.04 20.70 0.04 20.72 0.04 20.74 0.04 20.76 0.04 20.78 0.04 20.80 0.04 20.82 0.04 20.84 0.04 20.86 0.04 20.88 0.04 20.90 0.04 20.92 0.04 20.94 0.04 20.96 0.04 20.98 0.04 21.00 0.04 Elevation Discarded (feet) (cfs) 21.02 0.04 21.04 0.04 21.06 0.04 21.08 0.04 21.10 0.04 21.12 0.04 21.14 0.04 21.16 0.04 21.18 0.04 21.20 0.04 21.22 0.04 21.24 0.04 21.26 0.04 21.28 0.04 21.30 0.04 21.32 0.04 21.34 0.04 21.36 0.04 21.38 0.04 21.40 0.04 21.42 0.04 21.44 0.04 21.46 0.04 21.48 0.04 21.50 0.04 Pre -development 9 Reach Aon Llnk 103543 Intel Basin C- Pre Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 2 HydroCAD@ 8.00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Subcatchment 1S: Pre -development Runoff = 0.02 cfs @ 13.81 hrs, Volume= 0.013 af, Depth= 0.12" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-96.00 hrs, dt= 0.01 hrs Type II 24-hr 1 yr Rainfall=3.70" Area (sf) CN Description 57,934 45 Woods Poor, HSG A 57,934 Pervious Area Tc Length Slope min) (feet) (ft/ft) 52.0 314 0.0180 Description 0.10 Sheet Flow, sheet flow woods Woods: Light underbrush n= 0.400 P2= 3.70" Subcatchment 1S: Pre -development Hydrograph 0.02 cfs 0.02= Type II 24-hr 1 yr 0.018 Rainfall=3.70" 0.016' Runoff Area=5�7,934'sf 0.014- Runoff Volume=0.013'af 0.012' Runoff Depth=0.12" 0.017 Flow Length=314' ° Slope=0.0180:'/' LL 0.008 Tc=52.0 min 0.006' CN=45 ; 0.004' 0.002' 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Time (hours) p Runoff 1S Post -develop Infiltration Basin C 9 Reach Aon Link 103543 Intel Basin C- Post Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 2 HydroCAD®8 00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Pond 3P: Infiltration Basin C Inflow Area = 1.330 ac, Inflow Depth = 2.28" for 1 yr event Inflow = 5.65 cfs @ 11.95 hrs, Volume= 0.252 of Outflow = 0.09 cfs @ 10.70 hrs, Volume= 0.252 af, Atten= 98%, Lag= 0.0 min Discarded = 0.09 cfs @ 10.70 hrs, Volume= 0.252 of Routing by Stor-Ind method, Time Span= 0.00-96.00 hrs, dt= 0.01 hrs Peak Elev= 21.49' @ 16.99 hrs Surf.Area= 0 sf Storage= 6,971 cf Plug -Flow detention time= 772.4 min calculated for 0.252 of (100% of inflow) Center -of -Mass det. time= 772.5 min ( 1,584.1 - 811.6 ) Volume Invert Avail Storage Storage Description #1 19.30' 8,946 cf Custom Stage Data Listed below Elevation Cum.Store (feet) (cubic -feet) 19.30 0 21.00 5,061 22.00 8,946 Device Routing Invert Outlet Devices #1 Discarded 0.00' 0.09 cfs Exfiltration at all elevations Discarded OutFlow Max=0.09 cfs @ 10.70 hrs HW=19.33' (Free Discharge) t1=Exfiltration (Exfiltration Controls 0.09 cfs) 103543 Intel Basin C- Post Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 3 HydroCAD@ 8.00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Pond 313: Infiltration Basin C Hydrograph • • DrInflow1 . ✓ •. • ✓1 $torage=6.,971 0 1 1 1 1 LW1101 1 619 1 M0, •1• ❑ Inflow ❑p Discarded 103543 Intel Basin C- Post Type 1124-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 4 HydroCAD®8 00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Hydrograph for Pond 3P: Infiltration Basin C Time Inflow Storage Elevation Discarded (hours) (cfs) (cubic -feet) (feel) (cfs) 0.00 0.00 0 19.30 0.00 2.00 0.00 0 19.30 0.00 4.00 0.00 0 19.30 0.00 6.00 0.00 0 19.30 0.00 8.00 0.01 10 19.30 0.01 10.00 0.06 46 19.32 0.05 12.00 4.30 4,282 20.74 0.09 14.00 0.16 6,658 21.41 0.09 16.00 0.10 6,952 21.49 0.09 18.00 0.08 6,951 21.49 0.09 20.00 0.06 6,797 21.45 0.09 22.00 0.05 6,547 21.38 0.09 24.00 0.05 6,267 21.31 0.09 26.00 0.00 5,630 21.15 0.09 28.00 0.00 4,982 20.97 0.09 30.00 0.00 4,334 20.76 0.09 32.00 0.00 3,686 20.54 0.09 34.00 0.00 3,038 20.32 0.09 36.00 0.00 2,390 20.10 0.09 38.00 0.00 1,742 19.89 0.09 40.00 0.00 1,094 19.67 0.09 42.00 0.00 446 19.45 0.09 44.00 0.00 2 19.30 0.00 46.00 0.00 0 19.30 0.00 48.00 0.00 0 19.30 0.00 50.00 0.00 0 19.30 0.00 52.00 0.00 0 19.30 0.00 54.00 0.00 0 19.30 0.00 56.00 0.00 0 19.30 0.00 58.00 0.00 0 19.30 0.00 60.00 0.00 0 19.30 0.00 62.00 0.00 0 19.30 0.00 64.00 0.00 0 19.30 0.00 66.00 0.00 0 19.30 0.00 68.00 0.00 0 19.30 0.00 70.00 0.00 0 19.30 0.00 72.00 0.00 0 19.30 0.00 Time Inflow Storage Elevation Discarded (hours) (cfs) (cubic -feet) (feet) (cfs) 74.00 0.00 0 19.30 0.00 76.00 0.00 0 19.30 0.00 78.00 0.00 0 19.30 0.00 80.00 0.00 0 19.30 0.00 82.00 0.00 0 19.30 0.00 84.00 0.00 0 19.30 0.00 86.00 0.00 0 19.30 0.00 88.00 0.00 0 19.30 0.00 90.00 0.00 0 19.30 0.00 92.00 0.00 0 19.30 0.00 94.00 0.00 0 19.30 0.00 96.00 0.00 0 19.30 0.00 103543 Intel Basin C- Post Type // 24-hr 1 yr Rainfall=3.70" Prepared by Earth Tech Page 5 HydroCAD®8 00 s/n 003562 © 2006 HydroCAD Software Solutions LLC 7/20/2008 Elevation Discarded (feet) (cfs) 19.30 0.00 19.32 0.09 19.34 0.09 19.36 0.09 19.38 0.09 19.40 0.09 19.42 0.09 19.44 0.09 19.46 0.09 19.48 0.09 19.50 0.09 19.52 0.09 19.54 0.09 19.56 0.09 19.58 0.09 19.60 0.09 19.62 0.09 19.64 0.09 19.66 0.09 19.68 0.09 19.70 0.09 19.72 0.09 19.74 0.09 19.76 0.09 19.78 0.09 19.80 0.09 19.82 0.09 19.84 0.09 19.86 0.09 19.88 0.09 19.90 0.09 19.92 0.09 19.94 0.09 19.96 0.09 19.98 0.09 20.00 0.09 20.02 0.09 Stage -Discharge for Pond 3P: Infiltration Basin C Elevation Discarded (feet) (cfs) 20.04 0.09 20.06 0.09 20.08 0.09 20.10 0.09 20.12 0.09 20.14 0.09 20.16 0.09 20.18 0.09 20.20 0.09 20.22 0.09 20.24 0.09 20.26 0.09 20.28 0.09 20.30 0.09 20.32 0.09 20.34 0.09 20.36 0.09 20.38 0.09 20.40 0.09 20.42 0.09 20.44 0.09 20.46 0.09 20.48 0.09 20.50 0.09 20.52 0.09 20.54 0.09 20.56 0.09 20.58 0.09 20.60 0.09 20.62 0.09 20.64 0.09 20.66 0.09 20.68 0.09 20.70 0.09 20.72 0.09 20.74 0.09 20.76 0.09 Elevation Discarded (feet) (cfs) 20.78 0.09 20.80 0.09 20.82 0.09 20.84 0.09 20.86 0.09 20.88 0.09 20.90 0.09 20.92 0.09 20.94 0.09 20.96 0.09 20.98 0.09 21.00 0.09 21.02 0.09 21.04 0.09 21.06 0.09 21.08 0.09 21.10 0.09 21.12 0.09 21A4 0.09 21.16 0.09 21.18 0.09 21.20 0.09 21.22 0.09 21.24 0.09 21.26 0.09 21.28 0.09 21.30 0.09 21.32 0.09 21.34 0.09 21.36 0.09 21.38 0.09 21.40 0.09 21.42 0.09 21.44 0.09 21.46 0.09 21.48 0.09 21.50 0.09 Elevation Discarded (feet) (cfs) 21.52 0.09 21.54 0.09 21.56 0.09 21.58 0.09 21.60 0.09 21.62 0.09 21.64 0.09 21.66 0.09 21.68 0.09 21.70 0.09 21.72 0.09 21.74 0.09 21.76 0.09 21.78 0.09 21.80 0.09 21.82 0.09 21.84 0.09 21.86 0.09 21.88 0.09 21.90 0.09 21.92 0.09 21.94 0.09 21.96 0.09 21.98 0.09 22.00 0.09 fiThe Cate%�� na Group SOILS REPORT FOR STORM WATER BASINS Intel Site Camp Lejeune, NC Prepared For: EarthTcch 701 Corporate Center Drive Suite 475 Raleigh, NC 27607 Prepared By: The Catena Group Hillsborough, North Carolina April 14, 2008 Lin d 49/ _ Gary S. Kreiser 410-B Millstone Drive Hillsborough, NC 27278 (919)732-1300 INTRODUCTION The Marine Corps Base at Camp Lejeune plans an expansion of the Intel Site. As part of this expansion, several storntwater infiltration basins are proposed to infiltrate runoff from adjacent impervious surfaces. As part of the application process, a soils investigation detailing soil type, infiltration rate, and depth to seasonal high water table is required. The Catena Group, Inc (TCG) has been retained to perform the soil investigations. INVESTIGATION METHODOLOGY Prior to the field investigation, the Onslow County Soil Survey was referenced to get an overview of the possible soil series located in the study area. Around the Intel Site, there are three mapping units. Figure l presents the mapped soil series and the general location of the proposed infiltration basins where the borings and infiltration tests were performed. Table I presents the soil series, map unit symbol and taxonomic class. Table 1 Soil Series, Map Unit Symbol, and Taxonomic Class Map Unit Symbol Soil Series/Map Unit Taxonomic Class Name BaB, Baymeade Loamy, siliceous, semiactive, thermic Arenic Hapludults BmB Bayntcade-Urban land Loamy, siliceous, semiactive, complex thermic Arenic Hapludults Mac Marvyn Fine -loamy, kaolinitic, thermic, Typic Kanhapludults 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 (Ks,,T) of the soil. The Ksnr was measured in the field and used to characterize the infiltration rate for each proposed infiltration basin. KsrT measurements were performed at each of the proposed infiltration basin using a constant -head permeameter (Amoozemeter). Before any readings were recorded, the Amoozemeter was allowed to equilibrate, typically 25 minutes. Based on conversations with the designer of the proposed infiltration basins (Mr. Bryan Dick of Earth Tech), construction of these basins would remove approximately 6 to 12 inches of topsoil. As such, the KSAT measurements were performed around a depth of 12 inches in order to estimate the infiltration rate at the new soil surface. The only exception was at Basin 5 where the tests were performed deeper (around 25 inches) in order to get below a massive clay layer occurring near the surface. FINDINGS Soil Type Based on the borings in the vicinity of the proposed basins, it was determined that the majority of the soil at the Intel Site was either the Baymeade or the Marvyn soil series. Typically, the Marvyn series has more clay in the subsoil than the Baymeade series. Basin 4, 5 and 7 exhibit this clayey subsoil but are in open areas (See Figure 1) where the soil has been cut, filled, or graded so that the original soil has been altered such that the soil properties were not easily recognized. 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 (MRCS) Official Series Description (OSD) for the soil series that were mapped by the NRCS for this site. Detailed boring logs for each boring are attached. Table 2 Soil Borings and Soil Series Determination Boring # Soil Series Determination Basin 1 Baymeade Basin 2 Baymeade Basin 3 Baymeade Basin 4 Marvyn/Urban land Basin 5 Marvytr/Urban land Basin 6 Marvyn Basin 7 Marvyn/Urban land Depth to Seasonal High Water Table During the field investigation, the depth to the seasonal high water table (SHWT) was determined through the use of field indicators for redoximorphic features or the presence of saturated soil. Table 3 presents the soil borings and the determination of the SHWT. Table 3 Boring and Depth to SHWT Boring# SFIWT Determination (inches below Surface) Basin 1 46 Basin 2 >48 Basin 3 >48 Basin 4 30 Basin 5 24 (Perched) Basin 6 >48 Basin 7 26 Basin 4, 5 and 7 have clayey soil occurring at or near the surface and this clay affects the depth of the SHWT. While Basin 4 didn't show any indicators of wetness until 30 inches there was an area close to Basin 4 (See Figure I ) that at the time of the investigation was rutted, had cattails growing and standing water. A boring at the center of this wet area indicated a massive clay layer at the surface and a perched water table at 10 inches. Likewise, Basin 5 had a massive clay layer extending down to 24 inches with a perched water table. Below 24 inches the texture was sandy clay loam with no wetness. Basin 7 had a sandy surface horizon but a SHWT at 26 inches which corresponds with the occurrence of the clay layer at 26 inches. Infiltration Rate Multiple saturated hydraulic conductivity tests were performed at each proposed infiltration basin. The results for each test are shown below in Table 4. Data sheets for each hydraulic conductivity tests are also attached. At each basin location, the geometric mean was taken and is presented in Table 4. The geometric mcan 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 4 Results of Saturated Hydraulic Conductivity Tests and Geometric Mean Test Location Test Number Test Depth (inches) Measured Ksrr (in/hr) Geometric Mean (in/hr) Basin 1 1 12.2 1.92 2.43 2 13.0 4.04 3 11.8 1.85 Basin 2 1 13.8 1.06 1.21 2 13.4 1.63 3 14.2 1.04 Basin 3 1 11.4 1.92 2.88 2 12.6 4.68 3 12.2 3.26 Basin 4 1 12.6 1.59 0.24 2 12.6 0.12 3 13.4 0.07 Basin 5 00.11 0.15 2 24.8 Basin 6 1 17.3 1.31 1.18 ? 14.2 1.07 Basin 7 1 11.8 1.07 0.60 2 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 sandy loam to sandy clay loan, a moderation factor of 0.7 was used to correct for the potential of overestimating the infiltration rate. Table 5 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 5 Geometric Mean, Moderation Factor and Areal Infiltration Rate for Each Basin Test Location Geometric Mean Moderation Factor Areal Infiltration Rate inches/hour) Basin 1 2.43 0.7 1.70 Basin 2 1.21 0.7 0.85 Basin 3 3.08 0.7 2.16 Basin 4 0.24 0.7 0.17 Basin 5 0.15 0.7 0.11 Basin 6 1.18 0.7 0.83 Basin 7 0.60 0.7 0.42 As shown in Table 5, the majority of proposed basin locations have an infiltration rate of 0.8 inch/hour or greater with the only exceptions being Basin 4, 5 and 7. These infiltration rates are less than the required 0.52 inch hour and therefore are not suitable. CONCLUSIONS Based on the site evaluation, Basin 1, 2, 3 and 6 are suitable for infiltration basins. Whereas, Basin 4, 5 and 7 are not suitable for infiltration basins due to the presence of a massive clay layer near the surface, shallow SHWT and low infiltration rates. 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. aexeeRE �.g= a Romeo@! ,,. . , !< Q A n! , .• 9 6 or r xxoxx/ E --- - -` -- ) ,,,. _ ,,...!! ......... low -- ecee:ylG! of Q///;\ | Q/2 E ;/GG/;/ /7 2 []2CGdƒI d RGpR!! ,,,,,,,,, ewe/ � g o oe000a T3 O� 00�00o T3 j' 00 Ho F F x� o oao ° i„m �` 'cm ___ yg 000eoo° N3 3 HIM = n mmmmm zx mmmgm TARTMENT OF ENVIRONMENT, :ALTH & NATURAi, RESOURCES VISION OF ENVIRONIME14TAL HEALTH -T I—MVISION: MONWHASE: SHEET _OF COUNTY: !PROPER7Y I.D.4 T i AX 9: �;,-le � 5,/. NDSCAPE POSITIO.N .1940 3 1 4 OPE (%) .1940 )RLZON I DEPTH - 1943 0-/3 �9-21( 0-/z �-1'9. :E5 .1941 (a)(]) �ONSJSTENCE .1941 vp/l vFte V/,v v FA kFz Ff— TRUCTURS 1941 (a)(2) 44—�d 1, 541( I 6-)f 6�lz :6Ar )RIZON 2 DEPTH 1943 7 1'�X3.5 7311- -7—mj�x; - fl �y I/ / VA;h 12 is 6 EXTURE 1941 (a)(!) G(,i 'S'L CL I - I z !ONSISTENCE -1941 V Frl Ftz fl? F.L TRUCTIJ RE - 1941 Za)(2) 59& T— 'LA4LMIN-Z-R A I QGY .1941 (a)(3) "71f 3 /�#J/f fslr '7 0"o )RIZON 3 DEPTH .1943 V9 SI) XTURE r . 1941 (a)(1) 56 5CL ONSISTEENCE J941 FZ VF'Z Ff TRUCT URE .1941 (a)(2) 54-4: !,�-g (1-12 r:A., �.-RAL—r)Gy I qAj (a)(3) /9 �,l flY '�7-1 Y7 iR]ZON 4 DEPTH 1943 EXTURE 1941 (a)(!) ONISISTENCE - 1 qTl— 1,Fr? TRUC7URE .19, 1 (a)(2) .1941 (a)(3) /f,/a�jz �L WE 71NESS .1942 yp 2�0 3TRICTIVE H ORiWN .19-4-4 )IROLITE .19431.1956 kSSIFICATiON 1948 A. R. (agpdIfU) .1955 I rIER FACTORS (. 19461: AILABLE SPACE(.. 1945): "E CLASSIFICATION G1 SiTE LTAR (gpd)[L2): I 4-- MMENTS: V�l �,e, Ive., v - /0 C/� r ,,It, 1 llpa-�lk P, a 1� DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION Complete and email this form to Vincent. Lewis @ncmail.net. If there are more than 7 areas to be tested, attach a second sheet. Scheduled Site Visit Date: yOl7/ V 8 Time: /0 00 Project Name: USMC Leieune - SMTC County:Onslow_ Street Address: Birch St., Camp Leieune. Directions from the nearest intersection of two major roads: From Lejeune main gate, take Holcombe Blvd. to the traffic circle, bear right onto McHugh Blvd., .7 miles turn rt onto Birch St, project is on the right. >1 acre being disturbed? DYES ®NO CAMA Major required? []YES [:]NO Consultant Name: -Bryan Dick Phone: 864-506-1465 Consultant Firm Name:_ EARTH TECH 6AVD D � AP 1a! yA1G0 Bore Number 1 2 3 4 a Existing Ground Elevation a7 S- a).n A, $' b Proposed Bottom Elevation 11.3 64! - 3 c Difference a minus b 2• ,?. d Add 2 ft. Min. Bore Depth) . Z y. e Hardpan Depth? f Infiltration Rate OK? o/L O Approx. Elev. Of SHWT 7 h Max. lowest bottom elev. 74.2 Comme Sr 12 3 z/ — 7 M7- 6,00 A90t r ^66 Mir7n-t 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. Pal/ I 1 1 DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION Complete and email this form to Vincent. Lewis @ncmail.net. If there are more than 7 areas to be tested, attach a second sheet. Scheduled Site Visit Date: V17� �S Time: 10 00 Project Name: USMC Leieune - SM County:_Onslow_ Street Address: Birch St., Camp Leieune. Directions from the nearest intersection of two major roads: From Lejeune main gate, take Holcombe Blvd. to the traffic circle, bear right onto McHugh Blvd., .7 miles turn rt onto Birch St, project is on the right. >1 acre being disturbed? ❑YES ®NO CAMA Major required? ❑YES ❑NO Consultant Name: Bryan Dick Phone: 864-506-1465 Consultant Firm Name: EARTH TECH (-,ODD 0''r Bore Number 1 2 3 a Existing Ground Elevation a a'.0 $� b Proposed Bottom Elevation 3 c Difference a minus b 2. 07 d Add 2 ft. Min. Bore Depth) . Z q. e Hardpan Depth? f Infiltration Rate OK? p/L 0 Approx. Elev. Of SHWT 7 h Max. lowest bottom elev. C) b µwe ?q•2, 72q.2 >q.2 Comments 5 f 7,2573 '/ — 7 AD r 4,09 ,Aor2 � n rrc nGir9l rvr Required Attachments: 1. Legible vicinity map. 2. Complete Soils Report. 3. PDF formatted site plan with the be emailed or hand -delivered o boring locations to be tested. Site plans should ily. Illegible faxed maps will not be accepted. t 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. gg v , £ I e t9c Site 2)52 77 20 51.4 W 3440 31.3 N (( Z' 34X v- The Catena roup 410-B Millstone Drive Hillsborough, NC 27278 (919)732-1300 SOILS REPORT FOR STORM WATER BASINS Intel Site Camp Lejeune, NC Prepared For: EarthTech 701 Corporate Center Drive Suite 475 Raleigh, NC 27607 Prepared By: The Catena Group Hillsborough, North Carolina April 14, 2008 :p SQf[ .4 Gary S. Kreiser 11► Y Y ;i�lllll� Y LPL` The Marine Corps Base at Camp Lejeune plans an expansion of the Intel Site. As part of this expansion, several stormwater infiltration basins are proposed to infiltrate runoff from adjacent impervious surfaces. As part of the application process, a soils investigation detailing soil type, infiltration rate, and depth to seasonal high water table is required. The Catena Group, Inc (TCG) has been retained to perform the soil investigations. INVESTIGATION METHODOLOGY Prior to the field investigation, the Onslow County Soil Survey was referenced to get an overview of the possible soil series located in the study area. Around the Intel Site, there are three mapping units. Figure I presents the mapped soil series and the general location of the proposed infiltration basins where the borings and infiltration tests were performed. Table 1 presents the soil series, map unit symbol and taxonomic class. Table I Soil Series, Map Unit Symbol, and Taxonomic Class Map Unit Symbol Soil Series/Map Unit Taxonomic Class Name BaB, Baymeade Loamy, siliceous, semiactive, thermic Arenic Hapludults BmB Baymeade-Urban land Loamy, siliceous, semiactive, complex 'thermic Arenic Hapludults MaC Marvyn Fine -loamy, kaolinitic, thermic, Typic Kanhapludults 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 KsAT was measured in the field and used to characterize the infiltration rate for each proposed infiltration basin. KSAT measurements were performed at each of the proposed infiltration basin using a constant -head permeameter (Amoozemeter). Before any readings were recorded, the Amoozemeter was allowed to equilibrate, typically 25 minutes. Based on conversations with the designer of the proposed infiltration basins (Mr. Bryan Dick of Earth Tech), construction of these basins would remove approximately 6 to 12 inches of topsoil. As such, the KsAT measurements were performed around a depth of 12 inches in order to estimate the infiltration rate at the new soil surface. The only exception was at Basin 5 where the tests were performed deeper (around 25 inches) in order to get below a massive clay layer occurring near the surface. FINDINGS Soil Type Based on the borings in the vicinity of the proposed basins, it was determined that the majority of the soil at the Intel Site was either the Baymeade or the Marvyn soil series. Typically, the Marvyn series has more clay in the subsoil than the Baymeade series. Basin 4, 5 and 7 exhibit this clayey subsoil but are in open areas (See Figure 1) where the soil has been cut, filled, or graded so that the original soil has been altered such that the soil properties were not easily recognized. 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 the soil series that were mapped by the NRCS for this site. Detailed boring logs for each boring are attached. Table 2 Soil Borings and Soil Series Determination Boring # Soil Series Determination Basin I Baymeade Basin 2 Baymeade Basin 3 Baymeade Basin 4 Marvyn/Urban land Basin 5 Marvyn/Urban land Basin 6 1 Marvyn Basin 7 1 Marvyn/Urban land Depth to Seasonal High Water Table During the field investigation, the depth to the seasonal high water table (SHWT) was determined through the use of field indicators for redoximorphic features or the presence of saturated soil. Table 3 presents the soil borings and the determination of the SHWT. Table 3 Boring and Depth to SHWT Boring # SHWT Determination (inches below Surface) Basin 1 46 Basin 2 >48 Basin 3 >48 Basin 4 30 Basin 5 24 (Perched) Basin 6 1 >48 Basin 7 26 Basin 4, 5 and 7 have clayey soil occurring at or near the surface and this clay affects the depth of the SHWT. While Basin 4 didn't show any indicators of wetness until 30 inches there was an area close to Basin 4 (See Figure I ) that at the time of the investigation was rutted, had cattails growing and standing water. A boring at the center of this wet area indicated a massive clay layer at the surface and a perched water table at 10 inches. Likewise, Basin 5 had a massive clay layer extending down to 24 inches with a perched water table. Below 24 inches the texture was sandy clay loam with no wetness. Basin 7 had a sandy surface horizon but a SH WT at 26 inches which corresponds with the occurrence of the clay layer at 26 inches. Infiltration Rate Multiple saturated hydraulic conductivity tests were performed at each proposed infiltration basin. The results for each test are shown below in Table 4. Data sheets for each hydraulic conductivity tests are also attached. At each basin location, the geometric mean was taken and is presented in Table 4. 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 4 Results of Saturated Hydraulic Conductivity Tests and Geometric Mean Test Location Test Number Test Depth (inches Measured K11T (in/hr) Geometric Mean in/hr Basin I 1 12.2 1.92 2.43 2 13.0 4.04 3 11.8 1.85 Basin 2 1 13.8 1.06 1.21 2 13.4 1.63 3 14.2 1.04 Basin 3 1 11.4 1.92 2.88 2 12.6 4.68 3 12.2 3.26 Basin 4 1 12.6 1.59 0.24 2 12.6 0.12 3 13.4 0.07 Basin 5 1 25.6 0.22 0.15 2 24.8 0.1 1 Basin 6 1 17.3 131 1.18 2 14.2 1.07 Basin 7 1 11.8 1.07 0.60 2 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 sandy loam to sandy clay loam, a moderation factor of 0.7 was used to correct for the potential of overestimating the infiltration rate. Table 5 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 5 Geometric Mean, Moderation Factor and Areal Infiltration Rate for Each Basin Test Location Geometric Mean Moderation Factor Areal Infiltration Rate inches/hour Basin 1 2.43 0.7 1.70 Basin 2 1.21 0.7 0.85 Basin 3 3.08 0.7 2.16 Basin 4 0.24 0.7 0.17 Basin 5 0.15 0.7 0.11 Basin 6 1.18 0.7 0.83 Basin 7 0.60 1 0.7 1 0.42 1 As shown in Table 5, the majority of proposed basin locations have an infiltration rate of 0.8 inch/hour or greater with the only exceptions being Basin 4, 5 and 7. These infiltration rates are less than the required 0.52 inch/hour and therefore are not suitable. CONCLUSIONS Based on the site evaluation, Basin 1, 2, 3 and 6 are suitable for infiltration basins. Whereas, Basin 4, 5 and 7 are not suitable for infiltration basins due to the presence of a massive clay layer near the surface, shallow SH WT and low infiltration rates. 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. #m 7 • M 4 Legend YYdY • Proposed Basin Sites ISMS it ,ri _ Wet Area NRCS Soil Mapping Unit BaB ! BmB Mac Intel Site Date:April2008 Figure � Catena Camp Lejeune, NC Scale 111=100, Group Job No.: 7354 LCL'L2 6LSB'l 600L'I 0591E [[00 OOZ 'OSZ OS01 l'I B'9L Lu 11 6[SB'4 600L'I OS91[ LLO'0 OOZ OCZ 0.501 1'I L'LZ "1'14 6[SB'l 600L'I O'S9K "0'0 00'Z 0'IZ OS01 I'I p'BL 011. 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AINIIJOONOJ JIIOYtlOAN ZZ2 I 001" 001 O'B 00O2Z I1 Set Re ' ZM1 00021 1. 00 L O 01 US'92 2906 ZCIO 0002r LI00 D0'I 09 0OZ I 606'9 l SS662 IZ00 '990 00,09 "00 00I 09 00Z Z' 4 996'62 IZ002 1 0 IS IO 0 00 ZI I'I�BL .' 6Z i0, SO0' OO OS 00 0'C 0 Z'ISS. CSL 1995C SBL IISD'9 O'0009 IO 00 00z 09 SBZ BIZ SL60Z WE 00.1 00 0O'Z 00z II S'K N I N N OOZ :IbDl Al.,vONan00 P^al nlaM 6u,pu3 uo pvav0 v6u,pvetl :310N N04 NO-, 6MINO :v luap9lao> 1 I :Ou,pa6 Wvp uyau, L"Z :HO anryma.. 1 OS:Iw>I nlawOp -PH 0'LZ• '.fiuyev(s)Mn11HJ 6L US4' :(wa)OR., 59 9'9t :N^al ulvM 6uyu3 Ill, 062 :Iw>I W-0 -PH 59 +'9l '�pnel ulvM Bwuua., 6S 0'Sl Na.11al.M Pant TnM 111 :Iuy>ul)Wa0 wy>u, wa 3 we1H>H I uagwnN 09 CaHb :uv9vxl AuunS 9WZMZIC :alv0 131N1 AOn15 AlINI1JnONOJ JllntltlOAH I t I HYDRAULIC CONDUCTIVTY STUDY NTEL Dole: 312WO08 adom Cenmmn: Cloluey WformarNre(1). Location'. Seel a0 Number; 1 Hbrleon: E 0 DIP" rom.,. rtf SET UP Target Water Lavish 150 5.9 CBegimmeg Water Level 150 59 Hole D.,.(1 320 `t 26 Ending Water Level: 165 65 Reference (cm): e10.0 39 Head (cm) -150 59 CHT Turtle) hods,'. •27.0 Hole name., (cm)50 Halemmoelr): 2.5 inchus Valve Setting caelumiom A: 0001009 I -ON 20N NOTE: Preclude based oa Ending Water Level Doorman Fads 10.FJ: 1050 Water Reading Nang:In water level Chamber C.F. dock me (arm) Become Tlme man) (m) 0 (emllbl K IcMnq K to K ddarl 29 00 1050 0.0 27.3 1] 1050 1.0 1.00 001] 10]I00 10.8065 43545 6J 655 2fi6 0] 1050 3.0 1.00 001] aa100 1a19] L)519 2'211 36i Oa 1050 J.0 100 001] 25200 2.592] L0011 14 ST. 25] 0.5 1050 a0 L00 0.01) JI500 3.1784 12513 18722 25.1 16 1050 5.0 Log o.01T J]000 58HI 1.5018 22.a66 2a6 0.1 10510 6.0 1.00 o.01T 11500 J.l7& 12513 18722 3J.0 08 1050 ].0 1.00 Corr 50400 50au 2W21 29.955 HYDRAULIC CONDUCTIVITY STUDY NTEL Date: 3I262008 Location. Sites Number: 2 Hods : E O oegtn)mcbes). 12.6 Target Wemr Leve)i 5b s9 BePnnmg W: Level: ug l] Hda Oegm(cm). ug 026 Ending Were( Level: 130 51 Reference (cm) Head loin)', -150 r5.8 CHT Tube(.) semng: •300 Hole alamafer lcm):50 Hole tadioe (p: 2b Valve Earl�� eomfiem A: 0001436 1-ON ZON NOTE: Readings based on Ending Water Leval Coverdcn Factor (C.F )'. 20.0 Water cAenOein Chamber does Ebri Time O K K 29.] 00 200 0.0 295 02 10.0 20 210 1013 1110 0.1723 o.afi]8 1015 29.a If 1 20.0 40 210 1033 610 0.0162 0.1111 0.508 29.2 02 200 6.0 2.00 1 120.0 0.1723 006]a 1.015 26.e 0 200 80 3.00 0033 2a0.0 0]aa] 0.135] 2.O3 24l 04 200 10.0 200 00v 2a00 0.3447 0a 357 2.Oo 20 04 200 12.0 2.. 0033 2400 0.3aa 0135] 2.030 27.7 0.3 200 140 2. 0033 1800 0.2585 0101a 1.523 HYDRAUUC CONOUCTIVITY STUDY NTEL Date: YOV2008 LOcallon'. Seel Number: a Horizon: E O Oembol-ie.) 13.4 Target Wale:Level: 15.0 59 Ues Re,imen, Water Level'. 13.0 5.1 Hnle Degm harm3l0 1134 Emm, Water Level 13.0 5.1 Releren..Usti f 00 59 Head)cm): -10 5.9 CHT Tuoe)a a.,: • 29.0 Hole diameter fcm) 5.0 Hole mi (r): 2.5 Valve Setting: r_7� coefuounl A: 0001436 1-ON 2ON NOTE: Readings based on Ending Water Level Coverslon Factor(C. F)) 20.0 I 3 O0120 1 6 B0 :5 03 . 20 1Of 3 200033 0 . 0 1J . 0) .5 ees'1 z9o10 969zo ooze ttoa aaz S-n aoz I L'Lc 9es'I zs010 B69z0 OOZI 100 OOZ sZl o0z zo 6'e[ aes'I zm l'0 969z'a Oozl [[oo Oai S. oO.z z0 I'9[ 1610 I[s0o 9r[ro 009 CC00 o04 9'9 o0z r0 c9[ 9s'l zapL0 96920 0ORI CC00 OOZ 9'9 0Oz 1'0 ✓SC M1'0 I[s00 9r[t'0 009 [[Oa 00Z 5'r 002 I'0 89C 929'l Z9010 969Z'0 0021 C[O0 00Z 'S2' 002 Z0 'L'9C 0'7 INl ,uolvan00 pnayaryM 6uipu3 u0 pa.eV veulpeay :310N NO NO-4 LOZZ000 V lualryPm ( ( OU!.., anlvp 9Z'.10 enwu .ION O'S'Iwal..pwap aoN 064• Bu!ya. (vlayn11H0 cry all. 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S 11. Z0 ZH LIL'l2 0KI1 6919t 0'O25Z LI00 001 S'Z OS01 0 ♦'K LICK 'I 61191 0OZSZ 410'0 00'l S'I 090, 0K N I N N O wll pasEel3 4eBp �agweyJ ma0ueya iaLaM OS01 ;('d'J)�Ope�uOivanoJ laea. nl.M B.." uo pa,eq,0ugeatl :310N NOS N(YI 9[11000 :v luap9laoa ) 1 :6119P9-1-A LZ :U) anqu WH OS:Iwa)1alawep apH 0'LL• :Buglaa(,,l IHJ 6S 01I- :Iwa)E-H t'B 091� :Iwal aauanLay l'S O[l aanal+aleM Bulpu3 Zlll 0K :(wa)y1Ea0 aloes S'S 011 :Ianaq ioleM Oui,., sa 6'S OSL aana� �aleM la0�e1 LY4 aao4,u)ip0a0 Z ugwnN g aV9 uogvaoI PoOL9Z6 :aPO 3 Nt AOOlt A1NI1JlN]NOO Df10tlN0AH WL9L'0 859OI Z S690 01 L 01 L I I B9S'0 KILO EM1 O'0921 1. Lt01 0 O S9 ICO 9609'I 0092ZI L00 O0 0t O:OL ZO L1[Z N I N N 0 wll End., Magp aogwa.J U,aBu.yo ,N, O'SLl A'iJli,i,..Nano, I nal ialeM 0u11u1 uo paseq IOU-1-1 :31011 No NO 9EII000 vIua-!,P.a ( Bu1.119 eN-A � OS awa)mlawv9 apes 091• Buryav(a)apn11.0 6S 09, :(w>(peaH L'9 OZ1 :(.N eawuPtl IE OCl aana�a, B.,, t'L11 011 :IwBI W6a0 apH fit 9 ZI :Foal mlaM OmuwBaO fiS OSl :pnal �aleM laOaol dOJ CL4 '(e..-)WCaO aaynul wo u-110H I ugwnry 09 119 U, i—, Auun9 uorapuoO iiuvil /L :e1a0 31N1 AOII19 AlW10MN00 onnN OAH 1 I 1 m IJ E n _ry of Eg33; E" nnrv_rv___ 3 a m 2 0 E= m m m o 0 o m m w w.E $$$$$$$$ O _ E m u U m 5 r Z K 2 V U TARTMENT OF ENVIRONMENT, COUNTY: :ALTH & NATURAL RESOURCES PROPERTY I.D. 4 VISION OF ENVIRONMENTAL HEALTH / TAX: 3^tViSIOJ:: _T- / �•�%i C�^/i LCJ(4r C SHEET OF —,osLs tiDSC.AFE POSITION .1940 i I i 3 { 4; ! 6 7 OPE .1940 )R1ZON I DEPTH 1943 IG_G /� el- 1Q•2Y 0-/2 EXTC RE .1941 (a)(1) :ONSISTENCE .1941 vril VFr Vl' vFle AFL vF" Fir car�cc c TRUCTURC 1941 (a)(2) �.1941(a)(3) 6/1 '67"13 6-n /AY ,LLS G/Z /4y4.�3 612 /Iy<35 ( A1541( }'yi l? ,By/LYY G2 i )RIZON 2 DEPTH .1943 D 2.3 17-30 s -36 y yF 776 Z� 'EX TURE 1941 (a)(1) I LS L.S `�) [� sc SC.L GL LS :0NSISTENCE At941 VFyl TRUCTUR= �Lv ratUCRAI nrv� 1941(ax2) .1941 (a)(3) G/C /o2asLs G/f /1)/11/3 58/i !f/zs/F- silk oja r/y ;/'/: /a ya/' s/,` "Y" /ar / i i I )RIZON 3 DEPTH .1943 1C9 ll- 3f'-y& EXTURE . 1941 (a)(1) I S[L SCL. s[. :L ! SCL I C ONSISTENCE .1941 v*� r,a i -F.e vr-,z TRUCTU RE .1941 (a)(2) `b, L a�'—±14sttil OLiY .1941 (a)(3) '!ayas/ />•'v• / Y/1/ 'il .,// 0)rf/� IcYuyf% r IRIZON 4 DEPTH 1943 EXTURE 1941 (a)(1) 1 S i LS ONSSSTENCE .1941 yr-y I j✓j TRUCTURE 1941 (a)(2) i2 I I Ole Lki`- — LOGY .1941 (a)(3) /n/R7/z iL WETNESS + .1942 , %yp r �`. I /l(G'126 f/ 3T.lZICTWEE P. ORIZON .1944. 'ROLITE I I .1943/.1956 1SSIFICATiON 1948 i I A. R.(;pd/ft?) , .1955 HER FACTORS (.1946): SITE LIAR (gpolfc2}; AIL.ABLE SPACE (.1945): 'E CLASSIFICATION (.1948): SYSTEM TYPE: ALUATED BY: U1 hhK(i FXZNtN 3: MMENTS: /G'�n �..;,L /ey,z1�5- �.;� � - Yr..L�t/ l/ /1 fn 2G