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HomeMy WebLinkAboutSW8080715_HISTORICAL FILE_200808017 STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 Q 115 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS C7 HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 200 8 0 8 0 � YYYYMMDD Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of (Environment and Natural Resources Coleen H. Sullins Director Division of Water Quality August 1, 2008 Carl Baker, Deputy Public Works Officer U.S. Government — Marine Corps Base Camp Lejeune Camp Lejeune PWD, 1005 Michael Road Camp Lejeune, NC 28457 Subject: Stormwater Permit No. SW8 080715 Academic Instruction Facility, Camp Geiger High Density Project Onslow County Dear Mr. Baker: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Academic Instruction Facility, Camp Geiger on August 1, 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 080715 dated August 1, 2008, for the construction of the subject project. This permit shall be effective from the date of issuance until August 1, 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 150E 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 Chris Baker, or me at (910) 796-7215. Sinc ely, Edward Beck Regional Supervisor Surface Water Protection Section ENB/csb: S:\WQS\STORMWATER\PERMIT\08715.ju108 cc: Robert Silver, TranSystems Onslow County Building Inspections Chris Baker SWilmington-Regional Offices Central -Files ow hCarolina atarally North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www nowaterrmality ore Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer — 50 % Recycled110% Post Consumer Paper State Stormwater Management Systems Permit No. SW8 080715 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Carl Baker and Marine Corps Base, Camp Lejeune Academic Instruction Facility, Camp Geiger C Street, Camp Geiger, Onslow County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwaterrules') 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 August 1, 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 control has been designed to handle the runoff from 158,307 square feet of impervious area. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 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. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. Page 2 of 7 State Stormwater Management Systems Permit No. SW8 080715 The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, acres: 7 Onsite, ft : 304,718 Offsite, ft2: None b. Total Impervious Surfaces, ft2: 158,307 C. Design Storm, inches: 1.5 d. Pond Depth, feet: 513.31 average e. TSS removal efficiency: 90 f. Permanent Pool Elevation, FMSL: 12 g. Permanent Pool Surface Area, ft2: 29,886 h. Permitted Storage Volume, ft3: 35,583 i. Temporary Storage Elevation, FMSL: 13 j. Controlling Orifice: 2.5"0 pipe k. Permitted Forebay Volume, ft3: 19,166 I. Fountain Horsepower, HP 1/3 M. Receiving Stream/River Basin: New River / White Oak n. Stream Index Number: 19-31 o. Classification of Water Body: "SC" II. SCHEDULE OF COMPLIANCE 1. 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 time 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. Mowin.9 and re -vegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet structure must be available at all times. Page 3 of 7 State Stormwater Management Systems Permit No. SW8 080715 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. Decorative spray fountains will be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. c. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for a fountain in this pond is.1/3 horsepower. 6. The facilities shall be constructed as shown on the approved plans. This permit shall become void unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 7. 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. 8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 9. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 10. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 12. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. Page 4 of 7 State Stormwater Management Systems Permit No. SW8 080715 13. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and re -issuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. Permit issued this the 1st day of August, 2008. NORTH;;�2 INA ENVIRONMENTAL MANAGEMENT COMMISSION --I Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No. SW8 080715 Academic Instruction Facility, Camp Geiger Stormwater Permit No. SW8 080715 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 080715 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 elevations are per the approved plan. 6. The outlet structure is located per the approved plans. 7. Trash rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short- circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. Required drawdown devices are correctly sized per the approved plans. 13. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Regional Office Onslow County Building Inspections Page 7 of 7 DWQ USE ONLY Date Received Fee Paid Permit Number J -7 - - /" %:5_14XYQKQ_71�_ State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as on original j I. GENERAL INFORMATION I JUL 2 8 2008 1. Applicants name (specify the name of the corporation, individual, etc. who owns U.S. Government - Marine Corps Base Camp Lejeune 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Carl H. Baker, Deputy Public Works Officer 3. Mailing Address for person listed in item 2 above: MCB Camp Lejeune PWD, 1005 Michael Road City:Camp Lejeune State:NC Zip:28547 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.): Academic Instruction Facility, Camp Geiger 5. Location of Project (street address): C Street, Camp Geiger, MCAS New River City:lacksonville County:Onslow Zip:28547 6. Directions to project (from nearest major intersection): From intersection of U.S. Route 17 (Wilmington Highway) and Curtis Road, continue on Curtis Road through Main Gate for MCAS New River for approximately 3/4 mile, turn left onto A Street, continue for 1/2 mile and turn right onto 7" Street, Continue for 3 blocks, project is on north side of 7" Street (left side). Project is bounded by 7" Street C Street 6" Street and E Street in clockwise order. 7. Latitude:34° 44' 06" N Longitude:77° 2713" W of project 8. Contact person who can answer questions about the project: Name:Robert M. Silver Telephone Number: (757 ) 963-8933 Email:rmsilver@transystems.com II. PERMIT INFORMATION: Form SWU-101 Version 03.27.08 Page I of 4 1. Specify whether project is (check one): ®New ❑Renewal ❑Modification 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit numberN/A and its issue date (if known)N/A 3. Specify the type of project (check one): ❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑LAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ®NPDES Stormwater III. PROJECT INFORMATION " `- JUL 1. In the space provided below, summarize how stormwater will be treated. Also attac a detailed�i g rahvlee (one to two pages) describing stormwater management for the project . By: Detention basin is sized to provide required runoff volume control for 2 to 5 day detention of 1.5" of rainfall Discharge from basin enters existing storm drainage system as it exits project site. 2. Stormwater runoff from this project drains to the White Oak River basin. 3. Total Property Area: 200+ acres 4. Total Wetlands Area: 0 acres 5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site) 6. Total Project Area**:7.0 acres 8. How many drainage areas does the project 7. Project Built Upon 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. For high density projects, complete the table with one drainage area for each engineered stormwater device. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Edwards Creek Stream Class & Index No. SC, HQW, NSW, Index #19-13 Total Drainage Area (sf) 304,718 On -site Drainage Area (sf) 304,718 Off -site Drainage Area (sf) 0 Existing Impervious* Area (sf) 56,891 Proposed Impervious*Area (sf) 158,307 % Impervious* Area (total) 52 Impervious* Surface Area Drainage Area 1 ' . Drainage Area 2 On -site Buildings (so 41,183 On -site Streets (sf) 18,963 On -site Parking (sf) 85,437 On -site Sidewalks (sf) 9,682 Other on -site (so 3,042 Off -site (sf) 0 Total (sf): 158,307 * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. ,y 0 Form SWU-101 Version 03.27.08 Page 2 of 4 **Total project area shall be calculated based on the current policy regarding inclusion of toetlands in the built upon area percentage calculation. This is the area used to calculate percent project built upon area (BUA). 10. How was the off -site impervious area listed above derived?N/A 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. Forms can be downloaded from httn://h2o.enr.state.nc.us/su/bmp forms.htm - deed restrictions. 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 JUL 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. Forms can be downloaded from ham://h2o.enr.slate.nc.us/su/bmp forms.htm. 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 Form SW401-Permeable Pavement 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 Permeable Pavement Supplement Form SWU-101 Version 03.27.08 Page 3 of 4 -✓I. 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.etir.state.nc.us/SLdmsi maos.htm) 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials • Original and one copy of the Stormwater Management Permit Application Form VAW • Original and one copy of the Deed Restrictions & Protective Covenants Form (if �JA required as per Part IV above) • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP� • Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD) payable to NCDENR �� y • Calculations & detailed narrative description of stormwater treatment/management • Copy of any applicable soils report • Two copies of plans and specifications (sealed, signed &dated), including: - Development/Project name - Engineer and firm -Legend RF rF•Tv' - North arrow Scale JUL. 2 90ng Revision number & date Mean high water line _ Dimensioned property/project boundary BY'. 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) VIL 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. (ex. designing engineer or firm) Designated agent (individual or firm):Bob M. Silver, PE Mailing Address:TranSystems, Town Point Center,150 Boush Street, Ste. 1000 City:Norfolk State:VA Zip:23510 Phone: (757 ) 627-1112 Fax: (757 ) 627-1113 Email:-nnsilver@transystems.com VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) Carl H. Baker certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective cove is will be recorded, and that the proposed project complies with the requirements of 15A NCAC 2H .1000. 77 1 � A Date: Form SWU-101 Version 03.27.08 Page 4 of 4 . FFStemN July 31, 2008 Chris Baker North Carolina Department of Environmental Resources Stormwater Reviewer 127 Cardinal Drive Extension Wilmington, NC 28405 RE: Academic Instruction Facility, Camp Geiger Stormwater Management Plan Dear Mr. Baker: TranSystems 150 Boush Street, Suite 1000 Norfolk, VA 23510 Tel 757 6271112 Fax 757 627 1113 www.transystems.com RFcEmpt, AUG 0 I 2008 BY:`_ Per your request, we are submitting herewith two copies of the drawings and one copy of the cover sheet for the Stormwater Management Narrative and Calculations which have been sealed by a registered North Carolina engineer. Should you need additional copies or detailed information, please feel free to contact this office. Sincerely, Robert M. Silver, P.E. Senior Civil Engineer cc: David Towler (MCB Camp Lejeune) Scott Steele(Virtexco) I I FY 08 MCON P002 Academic Instruction Facility' Camp Geiger MCB Camp Lejeune, NC Contract No: N40085-08-C-1415 STORMWATER MANAGEMENT PLAN For Muvnl FyCllities Engineenn n;a,wnc dvatoH Commander Naval Facilities Engineering Command Mid -Atlantic 9742 Maryland Avenue H pNorfolk, VA 23511-3095 �f CA cROW SILVElt v No. _ 14479 NCDENR PERMIT SUBMITTAL 031167 28 July 2008 = 7- 3 08 r Systems) ��� V IRTEXC0 !i Syste c o w v o a a r 1 o H t,J - General Contractor DESIGNER 150 Boush St, Suite 1000 Norfolk, VA 23510 Phone (757) 627-1112 Fax (757) 627-1113 BUILDER 2909 Brunswick Avenue New Bern, NC 28562 Phone (252) 638-9116 FAX (252) 638-9117 • '•Y��Lr,.a IN, p: FY 08 MCON P002 Academic Instruction Facility Camp Geiger MCB Camp Lejeune, NC Contract No: N40085-08-C-1415 STORMWATER MANAGEMENT PLAN For '• Nawl FntllRies EnGlneetlnu Camrna`wl AIW Tc '� Commander Naval Facilities Engineering Command Mid -Atlantic 9742 Maryland Avenue Norfolk, VA 23511-3095 NCDENR PERMIT SUBMITTAL 28 July 2008 - -,� 'VIRTEXCO G O a P O R A T 1 O N ® Systellis General Contractor DESIGNER 150 Boush St, Suite 1000 Norfolk, VA 23510 Phone (757) 627-1112 Fax (757) 627-1113 BUILDER 2909 Brunswick Avenue New Bern, NC 28562 Phone (252)638-9116 FAX (252) 638-9117 FY 08 MCON P002 Academic Instruction Facility ® Camp Geiger MCB Camp Lejeune, NC Contract No: N40085-08-C-1415 STORMWATER MANAGEMENT PLAN For �iilk NavelF 61,11,, Enfllnaerin CCanvn l Commander Naval Facilities Engineering Command Mid -Atlantic 9742 Maryland Avenue Norfolk, VA 23511-3095 NCDENR PERMIT SUBMITTAL 28 July 2008 VIRTEXCO C O P P O H A T 1 O H j�'f [ °lS111 General Conlraclor DESIGNER 150 Boush St, Suite 1000 Norfolk, VA 23510 ® Phone (757) 627-1112. Fax (757) 627-1113 BUILDER 2909 Brunswick Avenue New Bern, NC 28562 Phone (252) 638-9116 FAX (252) 638-9117 El 'L7 Syst--� July 28, 2008 Janet Russell North Carolina Department of Environmental Resources Express Permit Coordinator 127 Cardinal Drive Extension Wilmington, NC 28405 RE: Academic Instruction Facility, Camp Geiger Stormwater Management Plan Dear Ms. Russell: TranSystems 150 Boush Street, Suite 1000 Norfolk, VA 23510 Tel 757 627 1112 Fax 757 627 1113 www.transystems.com We are submitting herewith the following information in support of our application for Express Review of the Stormwater Management Plan for the referenced project: 1. Original and one copy of the Stormwater Management Permit Application Form 2. Original of Form SW-401 Wet Detention Basin Supplement 3. Original of Form SW-401 Wet Detention Basin Operation & Maintenance Agreement 4. Combined SWM and LQ Express Review Fee in the amount of $4,000.00 5. 2 copies of the Site Plans and Specifications 6. Stormwater Management Narrative and Calculations 7. Copy of Report of Subsurface and Geotechnical Engineering Services, by GET Solutions, Inc. and Report of Geotechnical Exploration by MACTEC Engineering and Consulting, Inc. This submittal is being made concurrent with the Express Review Submittal for the Erosion and Sediment Control Plan for the referenced project. Should you need additional copies or detailed information, please feel free to contact this office. Sincerely, Robert M. Silver, P.E. Senior Civil Engineer cc: David Towler (MCB Camp Lejeune) Scott Steele (Virtexco) a.i,^3i'""+;P''w,RY„,..'tJ;,i`''"�'t''{:�,ANdanr" "t nt✓*u'1;',«�i.it ",.,ir DWQ USE'ONLt`YL�.a.Y 3::+.'""a'�,�a��'a'i�iWi;3'i.�i"u, iai" Date Received - Fee Paid Permit Number OCXD -- - C)y � State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This fonn may be photocopied for use as an original CE'IVF I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the U.S. Government - Marine Corps Base Camp Lejeune 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Carl H. Baker, Public Works Director 3. Mailing Address for person listed in item 2 above: MCB Camp Lejeune PWD 1005 Michael Road City:Camp Lejeune State:NC Zip:28547 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.): Academic Instruction Facility Camp Geer 5. Location of Project (street address): C Street Camp Geiger MCAS New River City:lacksonville County:Onslow Zip:28547 6. Directions to project (from nearest major intersection): From intersection of U.S- Route 17 (Wilmington Highway) and Curtis Road, continue on Curtis Road through Main Gate for MCAS New River forproximately 3/4 mile, turn left onto A Street, continue for 1/2 mile and turn right onto Th Street Continue for 3 blocks project is on north side of Th Street (left side). Project is bounded by la, Street C Street 6ch Street and E Street in clockwise order. 7. Latitude:34° 44' 06" N Longitude:77° 27 13" W of project 8. Contact person who can answer questions about the project Name:Robert M. Silver Telephone Number: (757 ) 963-8933 Email:rmsilver@transystems.com II. PERMIT INFORMATION: Form SWU-101 Version 03.27.08 Page I of 4 1. Specify whether project is (check one): ®New ❑Renewal ❑Modification 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the ® existing permit numberN/A and its issue date (if known)N/A 3. Specify the type of project (check one): ❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑LAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also at (one to two pages) describing stormwater management for the project. Surface runoff will be collected by underground storm sewer system and conveyed to wet detention basin. Detention basin is sized to provide required runoff volume control for 2 to 5 day detention of 1.5" of rainfall Discharge from basin enters existing storm drainage system as it exits project site. 2. Stormwater runoff from this project drains to the White Oak River basin. 3. Total Property Area: 200+ acres 4. Total Wetlands Area: 0 acres 5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site) 6. Total Project Area**:7.0 acres 7. Project Built Upon Area:52 % 8. How many drainage areas does the project have?1 ® 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. For high density nroiects. comolete the table with one drainage area for each engineered stormwater device. 0 iBasm Infor anon rainage Arealla Yr P Drarnage Ares ? t d ( Receiving Stream Name Edwards Creek Stream Class 8r Index No. SC, HQW, NSW, Index #19-13 Total Drainage Area (so 304,718 On -site Drainage Area (sf) 304,718 Off -site Drainage Area (so 0 Existing Impervious* Area (so 56,891 Proposed Impervious*Area (so 158,307 % Impervious* Area (total) 52 r sa F991ra°Me . 4 sw� r as Impervwus �SprfaceFFAreasf-, -- _ . ._ # z , }Drarrra e A"rea 1; (^ra 1a�;a�f.�a,gn.1� : c s Drama elArca'2 �Ity=f," An <.ng ) On -site Buildings (so 41,183 On -site Streets (so 18,963 On -site Parking (so 85,437 On -site Sidewalks (so 9,682 Other on -site (so 3,042 Off -site (so 0 Total (so: 158,307 * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SWU-101 Version 03.27.08 Page 2 of **Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. This is the area used to calculate percent project built upon area (BUA). C•] 10. How was the off -site impervious area listed above derived?N/A 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. Forms can be downloaded from httl27/fh2o.enr.state.nc.us/su/­`binp forms htm - deed restrictions. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions RF� •F�VED Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions JUL 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. Forms can be downloaded from http //h2o enr.state.nc..us/sufbmi2 forms.htm. Form SW401-Low Density Low Density Supplement Form SW401-Curb Outlet System Curb Outlet System Supplement Form SW401-Off-Site System Off -Site System Supplement Form SW401-Wet Detention Basin Wet Detention Basin Supplement Form SW401-Infiltration Basin Infiltration Basin Supplement Form SW401-Infiltration Trench Underground Infiltration Trench Supplement Form SW401-Bioretention Cell Bioretention Cell Supplement Form SW401-Level Spreader Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Form SW401-Wetland Constructed Wetland Supplement Form SW401-Grassed Swale Grassed Swale Supplement Form SW401-Sand Filter Sand Filter Supplement Form SW401-Permeable Pavement Permeable Pavement Supplement Form SWU-101 Version 03.27.08 Page 3 of 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 http7//h2o.enr.state.nc.us/sti/msi maps.htm) 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials • Original and one copy of the Stormwater Management Permit Application Form ✓ • Original and one copy of the Deed Restrictions & Protective Covenants Form (if HIA required as per Part IV above) • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP ✓ • Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD) payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management ✓ • Copy of any applicable soils report • Two copies of plans and specifications (sealed, signed & dated), including: - Development/Project name - Engineer and firm -Legend R.FCF TV ED - North arrow -Scale JUL 9 8 ZOOS - Revision number & date - Mean high water line BY: - 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. (ex. designing engineer or firm) Designated agent (individual or firm):N/A Mailing Address: City: State: Phone: { ) Fax: ( ) VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) Carl H. Baker certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A ® NCAC 2H .1000. Form SWU-101 Version 03.27.08 Page 4 of PermitNumber: (to be provided by DWQ) Drainage Area Number: Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provi WFCFIVED JUL 2 8 2008 This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. By; This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial . fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash debris is present. Remove the trash debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.3 Page 1 of 4 Perm it Number. :5'>0OO�-'O—IZ`/ (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or Swale The pipe is clogged. Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged - Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to a depth greater than the Search for the source of the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location w it will not cause impacts to s the BMP. Erosion has occurred. Provide additional erosio JUIL protection such as reinfor rf matting or riprap if need prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. EIVED 8 2008 Form SW401-Wet Detention Basin O&M-Rev.3 Page 2 of 4 Permit Number: S��(sky�tt (m be provided by OWQ) Drainage Area Number: BMP element: . Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. The outlet device Clogging has occurred. Clean out the outlet device. Dispose. of the sediment off -site. The outlet device is dama ed Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. RECEIVED The measuring device used to determine the sediment elevation shallbe su�h 08 that it will give an accurate depth reading and not readily penetrate accumulated sediments. When the permanent pool depth reads 5;0 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 5;0 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM ill in the blanks) Permanent Pool Elevation 12.00 Sediment Removal A. 7.00 Pe manen Pool ----------------- Volume Sediment Removal Elevation 7.00 I Volume Bottom Elevatio 6.00 -ft Min. [ Sediment Bottom Elevation 6.00 1-ft r Storage Sedimej Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.3 Page 3 of 4 Permit Number. (to be provided by DWQ) ® I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Academic Instruction Facility Camp Geiger BMP drainage area number: Print name:Carl H. Baker Title:Public Works Director MCB Camp Lejeune Address:1005 Michael Road Camp Lejeune NC 28547 Phone:(910) 451-2213 _ Signature: Date: Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. ►, , a Notary Public for the State of County of do hereby certify that personally appeared before me this day of , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, RR_.,CFJVFD Jul- 2 8 Z008 BY: SEAL My commission Form SW401-Wet Detention Basin O&M-Rev.3 Page 4 of 4 Stormwater Management Narrative Academic Instruction Facility Camp Geiger, MCB Camp Lejeune, NC 712412008 1. GENERAL INFORMATION a. Project Name: Academic Instruction Facility b. Address: C Street, Camp Geiger, MCAS New River, Jacksonville, NC c. Project Site Area: 200+ Acres (Camp Geiger), 12 Acres for Project d. Disturbed Area: 9.8 Acres e. Wetlands Impacts: None, NEPA required review did not determine any wetlands f. Ownership: U.S. Government g. Tax Parcel ID Number: N/A h. Pre-1988 Built Upon Area: N/A i. Project Phasing: The project will be constructed under a single construction contract. Demolition of the buildings included in the contract are not required to facilitate construction of the Academic Instruction Facility. Some of the buildings to be demolished are currently occupied and will require completion of the new Academic Instruction Facility to allow the occupants to be relocated to new spaces. The remainder of the buildings are unoccupied and can be demolished at any time during the contract. Construction of the new Academic Instruction Facility building will be done concurrent with the site improvements including stormwater facilities. j. The existing Base water distribution and wastewater collection systems will be utilized to provide service to the new facility. k. There are no historic sites or projects associated with this project. I. Non -Compliance Issues: None. ® 2. STORMWATER INFORMATION a. Project is located within the drainage area of Edwards Creek (Stream Index #19-13), a tributary to the New River within the White Oak River Basin. Edwards Creek is classified as SC, HQW, NSW waters. b. The main project site (AIF site) will have an impervious cover of approximately 60% upon completion of the project and is therefore considered a high density stormwater design. The project area exceeds one acre and is therefore subject to the NPDES permitting program. c. The main project site (AIF site) will have an impervious cover of approximately 60% upon completion of the project including, the surface area of the wet pond. The demolition of the existing buildings will eliminate approximately 63,000 square feet (1.44 Acres) of impervious surface area and replace it with pervious, vegetated surfaces. d. The proposed stormwater management plan includes the construction of on -site collection system conveying runoff from all impervious surfaces to a single wet detention pond prior to discharging to an existing storm drainage system. e. The stormwater management plan for this project.plans to utilize the existing 24-inch storm drainage system along 6th Street to collect surface runoff from the existing roadway, a portion of the pervious area adjacent to 6"h Street and the northern entrance to the parking lot. This area and runoff conditions are comparable to the existing conditions drained by this system and will result in a decrease in runoff conveyed by the existing pipe system. All of the remaining site area (pervious and impervious) will be collected by the on -site collection system and treated in the wet detention pond. f. The project area has no known buffer requirements nor does it impact any known buffers. g. There are no known areas of special concern associated with this project. Stormwater Management Narrative Academic Instruction Facility Camp Geiger, MCB Camp Lejeune, NC 712412008 h. The existing 24-inch storm drainage system along 6t^ Street collects surface runoff from areas outside of the project limits. Runoff from areas north of 6�h Street and west of C Street contribute to this existing system. The system continues eastward out of the project limits across E Street. It is the intent of this project to maintain this system and.the off -site drainage areas and not include this runoff in the on -site treatment system. The only change proposed to this existing system is the addition of a new drop inlet near the north entrance from 60 Street to collect runoff from the roadside swale and the conversion of the existing drop inlet adjacent to the entrance drive to a manhole. i. The project is completely contained within the boundaries of Camp Geiger, a U.S. Government property. j. Soils: Based on the National Cooperative Soil Survey, the main project site (exclusive of building demolition areas) consists of 98% Goldsboro -Urban land complex with 0 to 5 percent slopes and 2% Baymeade-Urban land complex with 0 to 6 percent slopes. The Baymeade-Urban land complex is located in the southeastern corner of the site near the intersection of Th and E Streets. Geotechnical investigations were performed in April, 2007 by GET Solutions, Inc and in May, 2008 by MACTEC Engineering and Consulting, Inc. which included several standard penetration test borings around the site. The general subsurface conditions found include a surface layer of topsoil and/or fill material extending down to a maximum of 4 feet with silty or clayey sands below this layer. A lean silt layer was encountered at a depth of 19 to 28 feet in a portion.of the site. Groundwater was encountered at depths of 5 to 6 feet below existing surface with normal seasonal fluctuations of 1 to 1.5 feet expected. The on -site material is suitable for use as fill within the limits of the project and will be used to the maximum extent practical. If borrow material is required, it will be obtained from private sources outside the limits of MCB Camp Lejeune. 3. PROJECT DESCRIPTION ® The purpose of the project is to construct a consolidated Academic Instruction Facility for the School of Infantry at Camp Geiger, Marine Corps Base Camp Lejeune, North Carolina. The single, two-story building will accommodate classrooms, administrative spaces and open space areas for processing incoming soldiers. Site improvements include canopies at the main entrance and the drop-off area, concrete walks, asphalt paved parking lot, vegetated open space and a stormwater management facility. The current site is open and contains a gravel parking lot, a paved tennis court, a small paved parking lot and modular building with scattered trees and grass vegetation. The 73,000 square foot, two- story building will occupy a footprint of 41,000 square feet in the western portion of the site. The building is setback from the adjacent roadways to meet Force Protection guidance established by the military. The paved parking lot for privately owned vehicles will be located east of the building and will be setback from the building to meet the same Force Protection criteria. The parking lot is sized to accommodate 250 vehicles and will be surfaced with asphalt concrete pavement. All of the existing surface features, including the gravel parking lot, tennis court and modular building will be removed to facilitate the new construction. The project also includes the demolition of 13 existing buildings within the Camp Geiger area outside of the area for the new instruction facility. These buildings will be demolished in their entirety, including foundations and the cutting and capping of utility services. The final surface where the buildings.stood will be graded to drain to existing surface features and will be stabilized with permanent grass vegetation. The main building site consists of 7.85 acres of paved and vegetated surfaces using the centerline of the adjacent roadways as the project limits. The actual area of disturbance will be 7.3 acres. The total site area for the 13 buildings to be demolished is approximately 4 acres of which 2.5 acres will be disturbed. The total area of disturbance for the project is 9.8 acres. �= = =..�` PAGE 2 OF 5 Stormwater Management Narrative 712412008 Academic Instruction Facility Camp Geiger, MCB Camp Lejeune, NC 0 4. GRADING AND STORMWATER MANAGEMENT The existing site is divided into three drainage areas which contribute to two existing storm drainage systems. Runoff in the northwestern portion of the site is collected in a roadside swale adjacent to 6t� Street which conveys the runoff to a drop inlet near the center of the block. This drop inlet is connected to a 24-inch storm drain line which parallels 6th Street from C Street to E street (west to east across the site). The northeastern portion of the site drains by overland flow and roadside swales to an existing drop inlet near the intersection of 6th Street and E Street which is connected to the same 24-inch storm drain along 6th Street. A 30-inch storm drain extends from this inlet across E Street and continues eastward out of the project site. This storm drainage system also collects runoff from areas on the north side of 6h Street and west of C Street. The remaining portion of the site drains by overland flow to the roadside swale along 7h Street which flows from west to east. This swale is collected by a drop inlet in the southeastern comer which is connected to a 30-inch storm drain that continues eastward out of the project site. Both of the storm drain systems eventually outfall into an open ditch that leaves Camp Geiger along it's eastern boundary and eventually discharges into Edwards Creek, a tributary of the New River within the White Oak River Basin. Edwards Creek is listed as Index Stream #19-13 and is classified as having SC, HQW and NSW waters. The proposed stormwater management plan for the Academic Instruction Facility project is based on making use of the existing storm drain line along 6th Street and directing the majority of the site to a new wet pond which will discharge into the existing storm drain line in the southeast comer of the site. The 24-inch storm drain line along 6U Street currently conveys runoff from areas outside of the project site in addition to collecting the surface flow from approximately 40% of the site. It is desired to keep the off -site runoff separated from the on -site runoff that will require treatment. Therefore, the existing storm drain line along 6th Street will be maintained and will continue to discharge via the 30-inch storm line under E Street to the east. On the western side of the site, a small strip of vegetated surface area directly adjacent to 6th Street will be collected in a roadside swale which will feed a new drop inlet connected to the 24-inch storm drain. This inflow will replace the runoff that was being intercepted by the drop inlet located in the center of the 6th Street frontage. This existing drop inlet will be converted to a manhole to maintain access to the storm drain while eliminating any conflict between the structure and the new parking lot entrance. On the eastern side, the parking lot entrance and the vegetated strip between the new parking lot and 6th Street will be collected in a roadside swale which will be intercepted by the existing drop inlet in the northeast corner of the site. In addition, the vegetated strip along the E Street frontage will continue to drain northward into the drop inlet at the intersection with 6th Street. This allows the grading along the existing roadways to be maintained while reducing the runoff contributing to the existing storm drain system along 6th Street. The remainder of the site, which includes the building, parking lot and portions of C Street and 7rh Street, will be collected by an on -site storm drainage system and conveyed to a new wet pond to be located in the southeast comer of the site. The wet pond will provide water quality treatment and storage to attenuate the peak discharge from the site so that is does not exceed the peak discharge from the existing site into the 30-inch system at the intersection of Th and E Streets. The project will result in the impervious cover for the project site reaching 60%, making this a high density development. The design for the wet pond will be based on the requirements to attain a 90% TSS pollutant removal efficiency. The outlet from the wet pond will be connected directly to the existing 30-inch storm pipe at the southeast comer of the site. 5. CALCULATIONS: The following pages consist of the calculations performed for the design of the storm drainage system and stormwater management plan for the referenced project. The calculations pertain only to the main site which is the location of the new building and parking lot. The building demolition sites all result in the net decrease of impervious area, however, Stormwater Management Narrative Academic Instruction Facility Camp Geiger, MCB Camp Lejeune, NC 7/24/2008 these sites are not within the immediate drainage area for the new building site. Hence, the building demolition sites have been excluded from the stormwater calculations. The calculations include a Land Use Tabulation which provides a breakdown of the total, paved and unpaved areas for each sub -drainage area within the project site for both the existing conditions and for the proposed, or post - development conditions. The total area included in the calculations is 7.85 acres and includes all areas within the centerlines of the adjacent roadways surrounding the site. The proposed conditions summary has been separated into off -site and on -site systems to indicate the difference between the contributing area to the existing 24-in6h storm drainage system along 6th Street and the contributing area to the on -site wet detention facility. The next page of the calculations presents a summary of the criteria check for the proposed wet detention facility including surface area to drainage area ratio, average depth, temporary storage volumes, etc as required by the Stormwater Best Management Practices Manual. The wet detention pond is designed to meet the criteria for 90% total suspended solids (TSS) removal in lieu of providing a vegetated filter strip at the discharge point. This was necessary as the discharge from the pond will enter directly into a piped storm drainage system as it exits the project site. Also included in these calculations is the estimated drawdown time for the temporary storage pool which is sized for 1.5 inches of rainfall. In addition, an estimation of the seasonal high groundwater table is provided based on data from the geotechnical explorations of this site. The fourth page presents a summary of the storage volumes of the forebay and main pond to verify the percentage of wet storage included in the forebay. The required storage in the forebay is approximately 20% and the actual storage provided is 18.5% of the total pond volume. The storage volume calculations presented herein are based on the Conic Method for Reservoir Volumes which is consistent with the methodology used in the analysis of the pond with the Haestad Methods Pondpack software which is discussed later in this narrative. The next six pages of the calculations present the Rational Method computations for design of the on -site storm drainage pipe system. Both the existing and proposed conditions are presented for the 1-year and 10-year return storm event. The primary purpose of these calculations is the sizing of the on -site pipe system and for verification that the existing receiving pipe systems are not detrimentally impacted by the project. As shown by these calculations, the contributing runoff from the project site to both of the receiving pipe systems will be reduced significantly. Following the storm drainage system design are the Drainage Area Maps for both the Existing and Proposed Conditions. In addition to the Rational Method design of the on -site pipe system, an analysis has been performed of the wet detention basin using the Haestad Methods Pondpack@ Detention Pond and Watershed Modeling Software. This software allows the generation of runoff hydrographs using the Soil Conservation Service's Curve Number methodology as presented in TR-55 which is based on. a 24-hour rainfall event. The computed runoff hydrograph is then routed through the detention pond using the Level Routing methodology. Storage volumes within the pond are estimated using actual planimetered areas for each contour and the Conic Method of Reservoir Volumes to compute actual storage within the pond. The ouffall system is modeled using established engineering principles and consists of a low level orifice for drawdown of the temporary storage pool, an inlet box that acts as either a weir or orifice depending on flow depths and an outlet culvert which conveys the discharge to the existing drainage system at the project limits. The low level orifice controls discharge from the pond when the water level is between normal water elevation (12.00 feet) and the top of the temporary storage volume (12.75 feet). Both the low level orifice and the inlet box control the discharge when the water level is above the temporary storage volume (12.75 feet) as this elevation coincides with the inlet box weir elevation. Finally, the discharge is controlled by the outlet culvert which is a 24-inch pipe exiting the side of the inlet box. The program restricts the discharge from the pond to the lesser flow allowed for either the combined low level orifice and inlet box, or the outlet culvert, depending on head conditions. The starting water elevation for the routing of the pond is the normal water elevation of 12.00 feet. Stormwater Management Narrative Academic Instruction Facility Camp Geiger, MCB Camp Lejeune, NC 712412008 Two separate models were generated for analysis of this project. The first model is the existing site conditions which are based on.current land cover conditions and no detention. The results of this model are presented in the report titled Existing Site Conditions and dated 5/30/2008. The second model is based on the proposed site conditions and includes routing through the wet detention pond. Both models are based on the full 7.85 acre, project area for the sake of consistency and ease of comparison between existing and proposed conditions. The Node ID denoted OUT 10 is a fictitious ouffall that combines the Flow from both of the existing storm drainage systems exiting the project site. While this combination of the two systems does not exist adjacent to the project site, it provides a means to evaluate the stormwater management of the full project site after development. The results of the second model are presented in the report titled Proposed Site Conditions, dated 7/25/2008. Both the existing and proposed conditions analyses are based on common input and criteria. The design rainfall events are the 1-year and 10-year 24-hour synthetic storms using the SCS Type III rainfall hyetograph. The total rainfall for the 1-year event is 3.56 inches and the total rainfall for the 10-year event is 6.69 inches. These rainfall depths were obtained from NOAA Precipitation Frequency Data Server using the latitude and longitude for the project site. The time of concentration for each sub -basin was based on the time estimated in the storm pipe design calculations (Rational Method). Composite runoff curve numbers are based on planimetered areas for paved and unpaved surfaces as presented in the Land Use Tabulation and CN values of 98 for paved areas and 74 for unpaved areas. The results of the analysis conclude that the wet detention pond will provide sufficient attenuation to reduce the post - development runoff from the project site to below existing conditions. Hence, the project will not have any detrimental impacts to the downstream receiving systems. The peak water elevation in the pond does not exceed elevation 14.00 feet. Since the lowest elevation of the enclosed pond is 15.00 feet, at least one foot of freeboard has been provided in the pond design. LAND USE TABULATION Project: Academic Instruction Facility, Camp Geiger, NC '" . Totala� 2!`z4Tbtai� �Uti -veils} StiUn"' ved� P.aved;E�lPavail,� • • Prom�i9na"'ti..3;i5# ` "- S ,'Ll Arad AC Y �l"Ada SF �' # C �'Aiea S. � ":?Ai'9a AC 7 Existing Conditions Area 2 87719 2.01 65223 1.50 22496 0.52 Area 4 37000 0.85 29233 0.67 7767 0.18 Area 10 217146 4.98 190518 4,37 26628 0.61 Total Area = 341865 7.85 6.54 1.31 Proposed Conditions Off -site System: 2 24158 0.55 18634 0.43 5524 4A 13096 0.30 8108 0.19 "4988 Ell, ub-total= 0.86 . 0.61 On -Site System, 101 2376 0.05 0 0.00 2376 0.05 102 22680 0.52 19855 0.46 2825 - 0.06 Roof 8048 0.18 0 0.00 8048 0.18 103 8881 0.20 6327 0.15 2554 0.06 Roof 2497 0.06 0 0.00 2497 0.06 104 9914 0.23 2674 0.06 7240 0.17 Roof 0 0.00 0 0.00 0 0.00 105 17512 0.40 3762 0.09 13750 0.32 Roof 3870 0.091 0 0.001 3870 0.09 106 10595 0.24 214 0001 10381 0.24 107 10747 0.25 642 0.011 10105 0.23 ' 108 0 0.00 0 0.001 0 0.00 201 1570 0.04 0 0.001 1570 0.04 . 202 15141 0.35 13232 0.301 1909 0.04 Roof 10987 0.25 0 0.001 10987 0.25 203 0 0.00 0 0.001 0 0.00 204 0 0.00 0 0.001 0 0.00 2051 38215 0.88 28773 0.661 9442 0.22 Roof 3035 0.071 0 0.00 30351 0.07 206 22576 0.52 3571 0.08 19005 0.44 Roof 5516 0.13 0 0.00 5516 0.13 207 34668 0.80 7098 0.16 27570 0.63 Roof 7230 0.17 0 0.00 7230 0.17 208 0 0.00 0 0.00 0 0.00 POND .68660 1.58 60263 1.38 8397 0.19 Sub -Total = 7.00 3.36 3.63 Total Area 1 3419721 7.85 1731531 3.98 168819 3.88 Total Acrea e = 7.85 3.98 3.88 On -Site Only = 304718 7.00 146411 3.36 158307 3.63 7/24/2008 Project: Academic Instruction Facility, Camp Geiger, NC ® Criteria Checks: Normal Water Elevation for permanent pool = 12.00 feet Pond Surface Area @ Normal Water Elev = 0.65 Acres Total Storage Volume @ Normal Water Elev = 2.21 Acre-feet Drainage Area to pond = 7.00 Acres Surface Area / Drainage Area Ratio = 9.3% Average Depth = Storage Volume/Surface Area = 3.4 feet Length of pond at Normal Water Elev = 240.0 feet Width of pond at Normal Water Elev = 120.0 feet Ratio of length to width = 2 :1 Bottom Elevation of permanent pool = 7.00 feet Bottom Elevation of pond = 6.00 feet Runoff Volume: Impervious portion of drainage area = 3.63 Total drainage area = 7.00 Impervious fraction, la = 0.52 Runoff Coefficient, Rv = 0.05+0.9*la = 0.52 Watershed Area, A = 7.00 Acres Design Storm Rainfall Depth, Rd = 1.5 inches Runoff Volume, V=3630*Rd*Rv*A = 19714.03 cubic feet 0.45 acre-feet Top of temporary storage elevation = 12.75 feet Total storage @ top of temporary pool = 2.75 acre-feet Total storage @ permanent pool = 2.21 acre-feet Storage in temporary pool = 0.54 acre-feet Drawdown Time: Temporary Pool Storage Volume = 0.54 acre-feet Maximum allowable discharge rate (Vol./2 days) = 0.137 cfs Minimum allowable discharge rate (Vol./5 days) = 0.055 cfs Maximum head on orifice = 0.75 ft Driving head, Ho (Max head/3) = 0.25 ft Orifice diameter= 2.5 in. Coefficiient of discharge, Cd = 0.6 Average discharge, Q=Cd*A*(SQRT(2gH)) = 0.082 cfs Estimated drawdown time (Vol/Q) = 3.3 days Seasonal High Water Table Estimation: Boring # Ground Depth to Approx. Elev. Water Elev. A-1 17.2 6.0 11.2 A-2 17.8 3.5 14.3 A-3 15.7 3.5 12.2 A-4 14.4 5.0 9.4 A-5 14.8 5.0 9.8 Average = 11.4 Add 1' for seasonal variance = 1.0 Estimated SHWT Elevation = 12.4 28363 113 96110 ft3 119751 ft3 96110 ft3 23641 ft3 23641 ft3 7/24/2008 2 Project: Academic Instruction Facility, Camp Geiger, NC Forebay Elevation Area Area Increments Total % of Total (SF) (AC) Volume Volume Volume 7.000 1672 0.04 0.000 0.000 0.000 0.0% 8.000 2330 0.05 0.137 0.046 0.046 13.8% 9.000 3059 0.07 0.185 0.062 0.107 15.1 % 10.000 3858 0.09 0.238 0.079 0.187 16.3% 11.000 4730 0.11 0.295 0.098 0.285 17.4% 11.500 5178 0.12 0.341 0.057 0.342 17.9% 12.000 6403 0.15 0.398 0.066 0.408 18.5% Main Pond Elevation Area Area Incremental Total % of Total Sum (SF) (AC) Volume Volume Volume Total 7.000 11733 0.27 0.000 0.000 0.000 0.0% 0.000 8.000 13153 0.30 0.856 0.285 0.285 86.2% 0.331 9.000 14653 0.34 0.957 0.319 0.605 84.9% 0.712 10.000 16243 0.37 1.063 0.354 0.959 83.7% 1.146 11.000 17979 0.41 1.178 0.393 1.352 82.6% 1.637 11.500 18934 0.43 1.271 0.212 1.563 82.0% 1.905 12.000 21960 0.50 1.407 0.234 1.798 81.5% 2.206 Combined Pond Elevation Area Area IncrementzTotal (SF) (AC) Volume Volume 7.000 13405 0.31 0.000 0.000 0.000 8.000 15483 0.36 0.994 0.331 0.331 9.000 17712 0.41 1.142 0.381 0.712 10.000 20101 0.46 1.301 0.434 1.146 11.000 22709 0.52 1.473 0.491 1.637 11.500 24112 0.55 1.612 0.269 1.906 12.000 28363 0.65 1.805 0.301 2.206 12.500 32902 0.76 2.108 0.351 2.558 12.750 33814 0.78 2.297 0.191 2.749 13.000 34725 0.80 2.360 0.197 2.946 14.000 38649 0.89 2.525 0.842 3.788 15.000 40615 0.93 2.729 0.910 4.697 7/24/2008 3 Academic Instruction Facility, Camp Geiger, NC Storm Drainage Computations -1 Yr Return cre ,Coeffiatent AtcOm , rrdn ft p ov DI1 Lee mime On Existinq Conditions (calculated feet) 6 4 0.00 0.15 0.00 0.00 0.95 0.00 0.00 10.0 4.7 0.0 12.64 11.52 416 0.0027 24 12.7 4.0 2.2 3.1 4 2 0.67 0.15 0.10 0.18 0.95 0.17 0.27 13.1 4.2 1.1 11.48 9.99 284 0.0052 24 17.8 5.7 3.1 1.5 2 1 1.50 0.15 0.22 0.52 0.95 - 0.49 0.99 14.6 3.9 3.8 9.99 9.35 48 0.0133 30 51.3 10.5 5.7 0.1 10 9 4.37 0.15 0.66 0.61 0.95 0.58 1.241 10.0 471 5.8 8.31 7.83 122 0.0039 30 27.9 5.7 1 7.85 I 1 1 9.6 Revised storm pipe design.XLS 1 7/17/2008 Academic Instruction Facility, Camp Geiger, NC Storm Drainage Computations -1 Yr Return r,fin) acre :Coetitcieiit A um ".� .�Tmin re i .fiefs n ft .p ttD`' ae�isl He ... WAN Proposed Outfall calculated In fee 101 102 0.00 0.15 0.00 0.05 0.95 0.05 0.05 10.0 4.7 0.2 15.25114 111 0.0059 15 5.3 4.4 2.4 0.8 102 103 0.46 0.15 0.07 0.25 0.95 0.24 0.36 10.8 4.5 1.6 14.60 220 0.0052 15 5.1 4.1 3.6 1.0 103 104 0.15 0.15 0.02 0.12 - 0.95 0.11 0.49 11.8 4.4 2.1 13.45 148 0.0051 - 15 50 4A 3.8 0.6 104 105 0.06 0.15 0.010.17 0.95 0.16 0.66 12.4 4.4 2.9 12.70 63 0.00511 181 8.1 4.6 4.1 0.3 105 208 0.09 0.15 0.01 0.40 0.95 0.38 1.051 12.7 4.2 4.4 12.38 12.00 63 0.0080 18 8.8 5.0 5.01 0.2 1061 107 0.00 0.15 0.00 0.24 0.95 0.23 0.23 10.0 4.7 1.1 12.50 12.00 63 0.0079 15 6.2 5.1 3.7 0.3 107 108 0.01 0.15 0.00 0.23 0.95 0.22 0.45 10.3 4.7 2.1 12.00 11.50 54 0.0093 15 5.7 5.5 4.8 0.2 201 202 0.00 0.15 0.00 0.04 0.95 0.03 0.03 10.0 4.7 0.2 16.40 16.00 76 0.0053 15 5.1 4.1 2.3 0.6 202 203 0.30 0.15 0.05 0.301 0.951 0.28 0.36 10.6 4.51 1.61 16.00 15.54 92 0.0050 15 - 4.9 4.0 3.5 0.4 203 204 0.00 0.15 0.00 0.00 0.95 0.00 0.361 11.0 4.5 le 15.54 14.731 160 0,0051 15 5.0 411 3.51 0.8 205 204 0.66 0.15 0.10 0.29 0.95 0.27 0.37 10.0 4.7 1.7 14.40 14.16 52 0.0046 15 4.7 3.9 3.5 0.2 204 206 0.00 0.15 0.00 0.00 0.95 0.00 0.73 11.8 4.4 3.2 14.16 13.30 171 0.0050 18 8.1 4.6 4.3 0.7 206 207 0.08 0.15 0.01 0.56 0.95 0.53 1.28 12.4 4A 5.6 13.30 12.40 112 0.0080 18 10.2 5.8 5.9 0.3 207 208 0.16 0.15 0.02 0.80 0.95 0.76 2.06 12.7 4.2 8.7 12.40 12.00 50 0.0080 24 21.9 7.0 6.6 0.1 208 209 0.00 0.151 0.00 0.00 0.95 0.00 3.12 12.9 4.2 13.1 12.00 11.40 1161 0.0052 301 32.0 5.5 6.1 0.3 Pond 1.38 0.15 0.21 0.19 0.95 0.18 . 3.96 13.2 4.2 16.7 Pond 10 0.00 0.15 0.00 0.00 0.95 - 0.00 0.00 10.0 4.7 0.9 8.50 8.31 66 0.0029 24 13.2 4.2 2.3 0.5 10 9 0.00 0.15 0.00 ' 0.00 0.95 0.00 0.00 10.0 4.7 0.9 8.31 7.83 122 0.0039 30 27.9 5.7 3.1 0.7 Off -Site: 6 4A 0.00 0.15 0.00 0.001 0.951 0.00 0.00 10.0 4.71 0.01 12.64 11.67 356 0.0027 24 12.8 4.1 2.21 2.6 4A 4 0.19 0.15 0.03 0.11 0.95 0.11 0.14 12.6 4.2 0.6 11.67 11.52 58 0.0026 24 12.5 4.0 2.2 0.4 4 2 0.00 0.15 0.00 0.00 0.95 0.00 0.14 13.1 4.2 0.6 11.52 9.99 284 0.0054 24 18.0 5.7 3.1 1.5 2 1 0.43 0.15 0.06 0.13 0.95 0.12 0.32 14.6 3.9 1.3 9.99 9.35 48 0.0133 30 51.3 10.5 5.7 0.1 Total Area = 7.85 2.2 NOTES: Piped system design is based on 10-year return frequency storm event using data generated from NOAA Precipitation Frequency Data Server. Pipe capacities are based on manning's equation using a roughness factor of 0.012 for concrete pipe. Minimum time of concentration is 10 minutes. Revised storm pipe design.XLS 2 _ 7/1712008 Project: Academic Instruction Facility, Camp Geiger, NC n-value = 0.012 Rainfall - Intensity - Duration Data Concrete Pipe Camp Geiger, NC Dia Area Hyd Rad 1-Year Retrun Frequency 4 0.087 0.083 6 0.196 0.125 8 0.349 0.167 Time Rain 10 0.545 0.208 12 0.785 0.250 5 5.86 15 1.227 0.312 6 5.62 18 1.767 0.375 7 5.39 21 2.405 0.437 8 5.15 24 3.142 0.500 9 4.92 27 3.976 0.562 .10 4.68 30 4.909 0.625 11 4.52 36 7.069 0.750 12 4.37 42 9.621 0.875 13 4.21 48 12.566 1.000 14 4.06 54 15.904 1.125 15 3.90 60 19.635 1.250 16 3.82 66 23.758 1.375 17 3.74 72 28.274 1.500 18 3.65 19 3.57 q/Q vN 20 3.49 0.00 0.55 21 3.41 0.05 0.55 22 3.33 0.10 0.64 23 3.24 0.15 0.72 24 3.16 0.20 0.78 25 3.08 0.25 0.83 26 3.00 0.30 0.87 27 2.92 0.35 0.90 28 2.83 0.40 0.94 29 2.75 0.45 0.97 30 2.67 0.50 1.00 31 2.64 0.55 1.02 32 2.60 0.60 1.04 33 2.57 0.65 1.06 34 2.54 0.70 1.08 35 2.50 0.75 1.09 36 2.47 0.80 1.11 37 2.44 0.85 1.12 38 2.40 0.90 1.13 39 2.37 0.95 1.14 40 2.34 1.00 1.15 41 2.30 42 2.27 43 2.24 Note on Precipitation Data: 44 2.20 45 2.17 Data obtained from Point Precipitation 46 2.14 Frequency Estimates from NOAA Atlas 14 47 2.10 generated by NOAA Precipitation Frequency 48 2.07 Server on April 30, 2008. Interim 49 2.04 ®Data values generated by linear interpolation 50 2.00 between given values. 60 1.67 7/17/2008 1 Academic Instruction facility, Camp Geiger, NC Storm Drainage Computations -10 Yr Return Revised stone pipe design.XLS 4 7/24/2008 Academic Instruction Facility, Camp Geiger, NC Storm Drainage Computations • 10 Yr Return 01 .acre Mae IN A Accum + mtn �M1r efa i R P' _. ee mlgm : a .. aefsF f inn..,. rTm el, Proposed Oudall calculated In /ee 101 102 0.00 0.15 0.00 0.05 0.95 0.05 0.05 10.0 7.2 0.4 15.25 14.60 111 0.0059 15 5.3 4.4 2A 0.8 102 103 0.46 0.15 0.07 0.25 0.95 0.24 0.36 10.8 6.9 2.5 14.601 13.45 220 0.0052 15 5.1 4A 4.0 0.9 103 104 0.15 0.15 0.02 0.12 0.95 0.11 0.49 11.7 6.7 3.3 13.45 12.70 148 0.0051 15 5.0 4.1 4.3 0.6 104 106 0.05 0.15 0.01 0.17 0.95 0.16 0.66 12.3 6.7 4.4 12.70 12.38 63 0.0051 18 8.1 4.6 4.6 0.2 105 208 0.09 0.15 0.01 _ 0.40 0.95 0.38 1.05 12.5 6.71 7.1 12.381 12.001 63 0,00601 181 8.8 5.0 5.5 0.2 1061 1071 0.00 0.15 0.00 0.24 0.95 0.23 0.23 10.0 7.2 1.6 12.50 12.00 63 0.0079 15 6.2 5.1 4.2 0.2 107 108 0.01 0.15 0.00 0.23 .0.95 0.22 0.45 10.2 7.2 -3.2 12.00 11.50 54 .0.0093 15 6.7 5.5 5.3 0.2 201 202 0.00 0.15 0.00 _ 0.04 0.95 0.03 0.03 10.0 7.2 0.2 16.40 16.00 76 0.0053 15 5.1 4.1 2.3 0.6 202 203 0.30 0.15 0.05 0.30 0.95 0.28 0.36 10.6 6.9 2.5 16.00 15.54 92 0.0050 15 4.9 4.0 4.0 0A 203 204 0.00 0.15 0.00 0.001 0.95 0.00 0.36 10.9 6.91 2.5 15.541 14.731 160 0.00511 15 5.0 4.1 4.1 0.7 2051 204 0.66 0.15 0.10 0.29 0.95 0.27 0.37 10.0 7.2 2.7 14.40 14.16 52 0.0046 15 4.7 3.9 - 3.9 0.2 204 206 0.00 0.15 0.00 0.00 0.95 . 0.00 0.73 11.6 6.7 4.9 14.16 13.30 171 0.0050 18 8.1 4.6 4.7 0.6 206 207 0.08 0.15 0.01 0.56 0.95 0.53 1.28 12.2 6.7 8.6 13.30 12.40 112 0.0080 18 10.2 5.6 .6.4 0.3 207 208 0.16 0.15 0.02 0.80 0.95 O.761 2o6l 12.5 6.7 13.9 12.40 12.00 50 0.0080 24 21.9 7.01 7.3 0.1 208 209 0.00 0.15 0.00 0.00 0.95 0.00 3.12 12.6 6.5 202 .12.00 11.40 116 0.0052 - 30 32.0 6.5 6.8 0.3 Pond 1.381 0.15 0.21 0.191 0.95 0.18 3.96 12.9 6.5 25.7 Pond 10 0.00 0.15 0.00 0.00 0.95 0.00 0.00 10.0 7.2 14.0 8.75 8.31 66 0,0067 24 20.0 6A 6.8 0.2 10 9 0.00 0.15 0.00 0.00 0.95 0.00 0.00 10.0 7.2 14.0 8.31 7.83 122 0.0039 30 27.9 5.7 5.7 0.4 Off -site: 6 4A 0.00 0.15 0.00 0.00 0.95 0.00 0.00 10.0 7.2 0.0 12.64 11.67 356 0.0027 24 12.8 4.1 2.2 2.6 4A 4 0.19 0.15 0.03 0.11 0.95 0.11 0.14 12.6 6.5 0.91 11.671 11.521 58 0.0026 24 12.5 4.0 2.2 0.4 4 2 0.00 0.15 0.00 0.00 0.95 0.00 0.14 13.1 6.5 0.9 11.52 9.99 284 0.0054 24 18.0 5.7 3.1 1.5 2 1 0.43 0.15 0.06 ' 0.13 0.95 0.12 0.32 14.6 6.1 1.9 9.99 9.35 48 0.0133 30 51.3 10.5 5.7 0.1 Total Area = 7.85 NOTES: Piped system design is based on 10-year return frequency storm event using data generated from NOAA Precipitation Frequency Data Server. Pipe capacities are based on manning's equation using a roughness factor of 0.012 for concrete pipe. Minimum time of concentration is 10 minutes. Revised storm pipe design.XLS 5 7/24/2008 Project: Academic Instruction Facility, Camp Geiger, NC n-value = 0.012 Concrete Pipe Dia Area Hyd Rad 4 0.087 0.083 6 0.196 0.125 8 0.349 0.167 10 0.545 0.208 12 0.785 0.250 15 1.227 0.312 18 1.767 0.375 21 2.405 0.437 24 3.142 0.500 27 3.976 0.562 30 4.909 0.625 36 7.069 0.750 42 9.621 0.875 48 12.566 1.000 54 15.904 1.125 60 19.635 1.250 66 23.758 1.375 72 28.274 1.500 q/Q v/V 0.00 0.55 0.05 0.55 0.10 0.64 0.15 0.72 0.20 0.78 0.25 0.83 0.30 0.87 0.35 0.90 0.40 0.94 0.45 0.97 0.50 1.00 . 0.55 1.02 0.60 1.04 0.65 1.06 0.70 1.08 0.75 1.09 0.80 1.11 0.85 1.12 0.90 . 1.13 0.95 1.14 1.00 1.15 Note on Precipitation Data: Data obtained from Point Precipitation Frequency Estimates from NOAA Atlas 14 generated by NOAA Precipitation Frequency Data Server on April 30, 2008. Interim values generated by linear interpolation between given values. Rainfall - Intensity - Duration Data Camp Geiger, NC 10-Year Retrun Frequency Time Rain 5 8.96 6 8.60 7 8.24 8 7.89 9 7.53 10 7.17 11 6.95 12 6.72 13 6.50 14 6.27 15 6.05 16 5.94 17 5.83 18 5.72 19 5.60 20 5.49 21 5.38 22 5.27 23 5.16 24 5.05 25 4.94 26 4.83 27 4.71 28 4.60 29 4.49 30 4.38 31 4.33 32 4.28 33 4.23 34 4.18 35 4.13 36 4.07 37 4.02 38 3.97 39 3.92 40 3.87 41 3.82 42 3.77 43 3.72 44 3.67 45 3.62 46 3.56 47 3.51 48 3.46 49 3.41 50 3.36 60 2.85 7/24/2008 6 REVDATE na MWE 0\NM7\0179\Slla\D,om9°\BanuE NF D,a'099 Mo Map.Gr9 VMUT NAME, Loyoull PLOl1E0: irIG°y, J°b Iq 2009 - IIO]am -s D am, B F 1In� l,RwwWo) � mCell — Ccaas>...- ---------------- J II PARKAN6 STOP 11 —(2G, W) ITT 1 \ \ < C) II / ) ��A 4 �NI II u FD _ _ _ _ — — --- N� II O 9 I R 9 J I \,gym cn n N J\ II II II U rn II2 I \•\. NJO III \�I 0 �I 1 0 0 II I \ o.41 1 C)WCID II y y III' i IU. 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VA Z YO d MARINE CORPS BASE MCB CAMP LEJEUNE, INC '.< ®� D " ° ° 9 ACADEMIC INSTRUCTION FACILITY ;5 N CAMP GEIGER y PROPOSED DRAINAGE AREA MAP �6 i=n EXISTING SITE CONDITIONS ------------------------- ------------------------- Project Date: 5/30/2008 Project Engineer: Robert M. Silver, P.E. Project Title: Academic Instruction Facility, Camp Geiger, NC Project Comments: Existing Site Conditions. Job File: G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW a Table of Contents i Table of Contents ++++++++++++++++*+*++* MASTER SUMMARY *++++*++++++++*++**+*+ Watershed....... Master Network Summary ............. 1.01 ****************** DESIGN STORMS SUMMARY ******************* Camp Geiger, NC Design Storms ...................... 2.01 TC CALCULATIONS *++++++++++++++***+++ SUBAREA 100..... Tc Calcs 3.01 SUBAREA 200..... Tc Calcs ........................... 3.02 ********************** CN CALCULATIONS SUBAREA 100..... Runoff CN-Area 4.01 SUBAREA 200..... Runoff CN-Area ..................... 4.02 ******************** RUNOFF HYDROGRAPHS ******************** ® SUBAREA 100..... Check Unit Hyd. Summary .................. 5.01 SUBAREA 100..... Design Unit Hyd. Summary .................. 5.02 SUBAREA 200..... Check Unit Hyd. Summary .................. 5.03 SUBAREA 200..... Design Unit Hyd. Summary .................. 5.04 11 Subarea �-�Junc 10 Add link 2o Subarea 200 Out 10 Type.... Master Network Summary Page 1.01 Name.... Watershed File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW MASTER DESIGN STORM SUMMARY Network Storm Collection: Camp Geiger, NC Total Depth Rainfall Return Event in Type RNF ID Design 3.5600 Synthetic Curve TypeIII 24hr Check 6.6900 Synthetic Curve TypeIII 24hr MASTER NETWORK SUMMARY SCS Unit Hydrograph Method (*Node=Outfall; +Node=Diversion;) (Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt) Return HYG Vol )de ID Type Event ac-ft Trun JUNC 10 JCT 1 1.015 JUNC 10 JCT 10 2.751 *OUT 10 JCT 1 1.015 *OUT 10 JCT 10 2.751 SUBAREA 100 AREA 1 .403 SUBAREA 100 AREA 10 1.054 SUBAREA 200 AREA 1 .612 SUBAREA 200 AREA 10 1.697 Max Qpeak Qpeak Max WSEL Pond Storage hrs cfs ft ac-ft 12.1500 10.91 12.1500 29.75 12.1500 10.91 12.1500 29.75 12.2000 4.12 12.1500 10.70 12.1500 6.86 12.1500 19.04 Type.... Design Storms Page 2.01 Name.... Camp Geiger, NC File.... G:\NF07\0179\Site\Drainage\ Title... Project Date: 5/30/2008 Project Engineer: Robert M.Silver, P.E. Project Title: Academic Instruction Facility, Camp Geiger, NC Project Comments: Existing Site Conditions. DESIGN STORMS SUMMARY Design Storm File,ID = Camp Geiger, NC Storm Tag Name = Design Data Type, File, ID = Synthetic Storm TypeIII 24hr Storm Frequency = 1 yr Total Rainfall Depth= 3.5600 in Duration Multiplier = 1 - Resulting Duration = 24.0000 hrs Resulting Start Time= .0000 hrs Step= .1000 hrs End= 24.0000 hrs Storm Tag Name = Check Data Type, File, ID.= Synthetic Storm TypeIII 24hr Storm Frequency = 10 yr Total Rainfall Depth= 6.6900 in Duration Multiplier = 1 , Resulting Duration=.24.0000 hrs Resulting Start Time= .0000 hrs Step= .1000 hrs End= 24.0000 hrs Type.... Tc Calcs Page 3.01 Name.... SUBAREA 100 File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW ........................................................................ ........................................................................ TIME OF CONCENTRATION CALCULATOR ......................................................................... ........................................................................ ------------------------------------------------------------------ Segment #1: Tc: User Defined Segment #1 Time: .2400 hrs -------------------------------------------------------------------- Total Tc: .2400 hrs Type.... Tc Calcs Page 3.02 Name.... SUBAREA 200 File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW TIME OF CONCENTRATION CALCULATOR ------------------------------------------------------------------------ Segment 41: Tc: User Defined Segment #1 Time: .1680 hrs ------------------------------------------------------------------------ Total Tc: .1680 hrs ------------------------- ------------------------- Type.... Runoff CN-Area Page 4.01 Name.... SUBAREA 100 File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW ® RUNOFF CURVE NUMBER DATA .......................................................................... .......................................................................... Soil/Surface Description CN paved area to structure 4 98 grass area to structure 4 74 paved area to structure 2 98 grass area to structure 2 74 Impervious Area Adjustment Adjusted . acres %C 8UC CN ------- .180 ----- ----- ------ 98.00 .670 74.00 .520 98.00 1.500 74.00 COMPOSITE AREA & WEIGHTED CN ---> 2.870 79.85 (80) ...........................�..............-- " '............................. ........................................................................... Type.... Runoff CN-Area Name.... SUBAREA 200 Page 4.02 File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW RUNOFF CURVE NUMBER DATA .......................................................................... .......................................................................... -------------------------------------------------------------------------- Impervious Area Adjustment Adjusted Soil/Surface Description CN acres %C %UC CN -------------------------------- ---- paved area to structure 10 98 --------- .610 ----- ----- ------ 98.00 grass area to structre 10 74 4.370 74.00 COMPOSITE AREA & WEIGHTED CN ---> ........................................................................... 4.980 76.94 (77) Type.... Unit Hyd. Summary Page 5.01 Name.... SUBAREA 100 Tag: Check Event: 10 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW Storm... TypeIII 24hr ' Tag: Check SCS UNIT HYDROGRAPH METHOD STORM EVENT: 10 year storm Duration = 24.0000 hrs Rain Depth='6.6900 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - SUBAREA 100 Check Tc = .2400 hrs Drainage Area = 2.870 acres Runoff CN= 80 Computational Time Increment = .03200 hrs Computed Peak Time = 12.1600 hrs Computed Peak Flow = 10.84 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.1500 hrs Peak Flow, Interpolated Output = 10.70 cfs ----------------------- DRAINAGE AREA ------------------- ID:SUBAREA 100 CN = 80 Area = 2.870 acres S = 2.5000 in 0.2S = .5000 in Cumulative Runoff ------------------- 4.4092 in 1.055 ac-ft HYG Volume... 1.054 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = '.24000 hrs (ID: SUBAREA 100) Computational Incr, Tm = .03200 hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(1+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 (solved from K = .7491) Unit peak, qp = 13.55 cfs Unit peak time Tp = .16000 hrs Unit receding limb, Tr '=. .64000 hrs Total unit time, Tb = .80000 hrs Type.... Unit Hyd. Summary Page 5.02 Name.... SUBAREA 100 Tag: Design Event: 1 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW Storm... TypeIII 24hr Tag: Design ® SCS UNIT HYDROGRAPH METHOD STORM EVENT: 1 year storm Duration = 24.0000 hrs Rain Depth = 3.5600 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - SUBAREA 100 Design Tc = .2400 hrs Drainage Area = 2.870 acres Runoff CN= 80 -------------------------------------------- Computational Time Increment = .03200 hrs Computed Peak Time = 12.1920 hrs Computed Peak Flow = 4.15 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.2000 hrs Peak Flow, Interpolated Output = 4.12 cfs -----------------=------------------------- -------------------------------------------- DRAINAGE AREA ------------------ ID:SUBAREA 100 CN = 80 Area = 2.870 acres S = 2.5000 in 0.25 = .5000 in Cumulative Runoff ------------------- 1.6841 in .403 ac-ft HYG Volume... .403 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .24000 hrs (ID: SUBAREA 100) Computational Incr, Tm = .03200 hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(1+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 ('solved from K = .7491) Unit peak, qp = 13.55 cfs Unit peak time Tp = .16000 hrs Unit receding limb, Tr = .64000 hrs Total unit time, Tb = .80000 hrs Type.... Unit Hyd. Summary Page 5.03 Name .... SUBAREA 200 Tag: Check Event: 10 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW Storm... TypeIII 24hr Tag: Check ® SCS UNIT HYDROGRAPH METHOD - STORM EVENT: 10 year storm Duration = 24.0000 hrs Rain Depth = 6.6900 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - SUBAREA 200 Check Tc = .1680 hrs Drainage Area = 4.980 acres Runoff CN= 77 Computational Time Increment = .02240 hrs Computed Peak Time = 12.1408 hrs Computed Peak Flow = 19.23 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.1500 hrs Peak Flow, Interpolated Output = 19.04 cfs ----------------------- DRAINAGE AREA ------------------- . ID:SUBAREA 200 ® CN = 77 Area = 4.980 acres S = 2.9870 in 0.25 = .5974 in Cumulative Runoff ------------------ 4.0883 in 1.697 ac-ft HYG Volume... 1.697 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .16800 hrs (ID: SUBAREA 200) Computational Incr, Tm = .02240 hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(1+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 (solved from K = .7491) Unit peak, qp = 33.59 cfs Unit peak time Tp = .11200 hrs Unit receding limb, Tr =, .44800 hrs Total unit time, Tb = .56000 hrs Type.... Unit Hyd. Summary Page 5.04 Name.... SUBAREA 200 Tag: Design Event: 1 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY-EXISTING.PPW Storm... TypeIII 24hr Tag: .Design SCS UNIT HYDROGRAPH METHOD STORM EVENT: 1 year storm Duration = 24.0000 hrs Rain Depth = 3.5600 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - SUBAREA 200 Design Tc = .1680 hrs Drainage Area = 4.980 acres Runoff CN= 77 Computational Time Increment = .02240 hrs Computed Peak Time = 12.1408 hrs Computed Peak Flow = 6.90 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.1500 hrs Peak Flow, Interpolated Output = 6.86 cfs DRAINAGE AREA ------------------- ID:SUBAREA 200 CN = 77 Area = 4.980 acres S = 2.9870 in 0.2S = .5974 in Cumulative Runoff ------------------- 1.4752 in .612 ac-ft HYG Volume... .612 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .16800.hrs (ID: SUBAREA 200) Computational Incr, Tm = .02240 hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(l+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 (solved from K = .7491) Unit peak, qp = 33.59 cfs Unit peak time Tp = .11200 hrs Unit receding limb, Tr = .44800 hrs Total unit time, Tb = .56000 hrs PROPOSED SITE CONDITIONS --------—------------------ ------------------------- Project Date: 7/25/2008 Project Engineer: Robert M. Silver, P.E. Project Title: Academic Instruction Facility, Camp Geiger, NC Project Comments: Proposed Site Conditions, single pond. Job File: G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Table of Contents +++++++++++++*++*+++++++ WARNING MSG +++**++**+++++++*+++*++ ® WARNING......... WARNING MESSAGES ................... 1:01 *+*****++*+++++++++++* MASTER SUMMARY +*++*****+++++++++***+ Watershed....... Master Network Summary 2.01 ****************** DESIGN STORMS SUMMARY ******************* Camp Geiger, NC Design Storms ...................... 3.01 +++++***********+*++++ TC CALCULATIONS +*++++++++*++*+*+++++ 6TH STREET...... TC Calcs ........................... 4.01 ON -SITE SYSTEM.. TC Calcs ........................... 4.02 POND AREA....... Tc Calcs ........................... 4.03 ++*++++++++*+**+**+*** CN CALCULATIONS ***++*+++++++++****** 6TH STREET...... Runoff CN-Area ..................... 5.01 ON -SITE SYSTEM.. Runoff CN-Area ..................... 5.02 POND AREA....... Runoff CN-Area ..................... 5.03 ******************** RUNOFF HYDROGRAPHS ******************** 6TH STREET...... Check .Unit Hyd. Summary .................. 6.01 6TH STREET...... Design Unit Hyd. Summary .................. 6.02 ON -SITE SYSTEM.. Check Unit Hyd. Summary .................. 6.03 ON -SITE SYSTEM.. Design Unit Hyd. Summary .................. 6.04 POND AREA....... Check Unit Hyd. Summary .................. 6.05 POND AREA....... Design Unit Hyd. Summary .................. 6.06 +++++++++++++++++++++++ POND VOLUMES.*+++**+*+*+*++++++++*+* POND 20......... Vol: Planimeter .................... 7.01 ******************** OUTLET STRUCTURES ********************* Outlet I........ Outlet Input Data ................... 8.01 Composite Rating Curve ..... :....... 8.04 +++++++++++++*+++++*++* POND ROUTING *****++++++++++++++**** POND 20 OUT Check Pond Routing Summary 9.01 POND 20 OUT. Design Pond Routing Summary 9.02 Type.... WARNING MESSAGES Page 1.01 Name.... WARNING File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW RNING: Kr (Reverse Flow Entrance Loss Coefficient) was not specified was set to same value as Ke= .2 Check data for..... Type: Outlet Input Data Name: Outlet 1 WARNING: Charged riser flow adjusted to weir flow rate to - maintain convergence. If adjustments are desired, substitute a user defined outlet rating table for level.pool routing. Or, store rating curve(s) in E-Q-TW table, edit, then route with ICPM option. Check calcs for outlet structure: Outlet 1 WARNING: Hydrograph truncated on right side. Check HYG table printed for: POND 20 OUT Design WARNING: Outflow hydrograph truncated on right side. Check output for: Pond Routing Summary POND 20 OUT Design WARNING: Junction node <JUNC 20> is a confluence node. For possible alternatives, see help topic: Network Configuration for Tailwater Analyses. WARNING: Adding in hydrograph that is truncated on right... Check output for: Node: Addition Summary JUNC 20 WARNING: Hydrograph truncated on right side. Check HYG table printed for: POND 20 OUT Check . ',RNING: Outflow hydrograph truncated on right side. .ieck output for: Pond Routing Summary POND 20 OUT Check WARNING: Junction node <JUNC 20> is a confluence node. For possible alternatives, see help topic: Network Configuration for Tailwater Analyses. 6th Stree 9 oo� O Add link 20 W Route 20 _ Addlink 40 �ond Area Fond 20 Junc 20 Out 10 aapO� P On -Site System Type.... Master Network Summary Name.... Watershed File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW ® MASTER DESIGN STORM SUMMARY Network Storm Collection: Camp Geiger, NC Total Depth Rainfall Return Event in Type ------------ Design ------ 3.5600 ---------------- Synthetic Curve Check 6.6900 Synthetic Curve Page 2.01 RNF ID ---------------- TypeIII 24hr - TypeIII 24hr MASTER NETWORK SUMMARY SCS Unit Hydrograph Method _ (*Node=Outfall; +Node=Diversion;) (Trun= HYG Truncation: Blank=None; L=Left; R=Rt; L'R=Left&Rt) Return ode ID Type Event 6TH STREET AREA 1 6TH STREET AREA 10 JUNC 20 JCT 1 JUNC 20 JCT 10 ON -SITE SYSTEM AREA 1 ON -SITE SYSTEM AREA 10 *OUT 10 JCT 1 *OUT 10 JCT 10 POND 20 IN POND 1 POND 20 IN POND - 10 POND 20 OUT POND 1 POND 20 . OUT POND 10 POND AREA AREA 1 POND AREA AREA 10 HYG Vol ac-ft Trun .176 .428 1.420 R 3.361 R 1.090 2.442 1.420 R 3.361 R 1.283 2.976 1.245 R 2.933 R .193 .535 Qpeak hrs 12.2000 12.2000 12.2000 12.4500 12.1500 12.1500 12.2000 12.4500 12.1500 12.1500 14.4000 12.5500 12.1500 12.1500 Max Qpeak Max WSEL Pond Storage cfs ft ac-ft 1.80 4.27 1.96 12.11 11.48 24.82 1.96 12.11 13.64 30.83 .95 10.11 2.16 6.00 13.12 .835 13.87 1.466 Type.... Design Storms Name.... Camp Geiger, NC Page 3.01 File.... G:\NF07\0179\Site\Drainage\ ® Title... Project Date: 5/30/2008 Project Engineer: Robert M. Silver, P.E. Project Title: Academic Instruction Facility, Camp Geiger, NC Project Comments: Proposed Site Conditions, single pond, dual on -site collection systems. DESIGN STORMS SUMMARY Design Storm File,ID - Storm Tag Name = Design Camp Geiger, NC Data Type, File, ID = Synthetic Storm Storm Frequency . = 1 yr Total Rainfall Depth= 3.5600 in Duration Multiplier = 1 Resulting Duration = 24.0000.hrs Resulting Start Time= .0000 hrs Step= Storm Tag Name = Check Data Type, File, ID = Synthetic Storm 40 Storm Frequency = 10 yr Total Rainfall Depth= 6.6900 in Duration Multiplier = 1 Resulting Duration = 24.0000 hrs Resulting Start Time= .0000 hrs Step= 40 ------------------- TypeIII 24hr 1000 hrs End= 24:0000 hrs ------------------------- TypeIII 24hr 1000 hrs End= 24.0000 hrs Type.... Tc Calcs Page 4.01 Name.... 6TH STREET File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW TIME OF CONCENTRATION CALCULATOR . Segment #1: Tc: User Defined Segment #1 Time: .2500 hrs ----------------------------------------------------`------------------- Total Tc .2500 hrs Tc Equations used... ------------------------------------------------------------------------ User Defined ______________________________________________________ Tc = Value entered by user Where: Tc = Time of concentration Type.... Tc Calcs Page 4.02 Name.... ON -SITE SYSTEM File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW .................................................. ... .. TIME OF CONCENTRATION CALCULATOR Segment #1: Tc: User Defined ------------------------- Tc Equations used... ------------------------- Segment #1 Time: .2170 hrs - ----------------------------------------- Total Tc: .2170 hrs UserDefined =----------------------------------------------------- Tc = Value entered by user Where: Tc = Time of concentration Type.... Tc Calcs Page 4.03 Name.... POND AREA, File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW ................................................ TIME OF CONCENTRATION CALCULATOR ------------------------------------------------------------------------ Segment #1: Tc: User Defined Segment #1 Time: .1670 hrs ------------------------------------------------------------------------ -------------- Total Tc: .1670 hrs ------------------------------------------------------------------------ Tc Equations used... ------------------------------------------------------------------------ ___= User Defined Tc = Value entered by user Where: Tc = Time of concentration Type.... Runoff CN-Area Page 5.01 Name.... 6TH STREET File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW RUNOFF CURVE NUMBER DATA Impervious Area Adjustment Adjusted Soil/Surface Description CN acres %C %UC CN -------------------------------- ---- paved area 98 .460 98.00 . grass area 79 .600 74.00 COMPOSITE AREA & WEIGHTED CN ---> 1.060 84.42 (84) Type.... Runoff CN-Area Page 5.02 Name.... ON -SITE SYSTEM File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW RUNOFF CURVE NUMBER DATA Impervious' Area Adjustment Adjusted Soil/Surface Description CN acres %C %UC CN ----- ----------------- paved area 98 3.440 98.00 grass area 74 1.980 74.00 COMPOSITE AREA 6 WEIGHTED CN ---> 5.420 89.23 (89) Type.... Runoff CN-Area Page 5.03 Name.... POND AREA File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW RUNOFF CURVE NUMBER DATA Soil/Surface Description -------------------------------- normal water level grass area --------------------------------------- Impervious Area Adjustment Adjusted CN acres %C %UC CN ------------- ----- ----- ------ 98 .190 98.00 74 1.380 74.00 COMPOSITE AREA & WEIGHTED CN ---> 1.570 76.90 (77) r Type.... Unit Hyd. Summary Page 6.01 Name.... 6TH STREET Tag: Check Event: 10 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Storm... TypeIII 24hr Tag: Check SCS UNIT HYDROGRAPH METHOD STORM EVENT: 10 year storm Duration = 24.0000 hrs Rain Depth = 6.6900 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - 6TH STREET Check Tc = .2500 hrs Drainage Area = 1.060 acres Runoff CN= 84 ------------ Computational Time Increment = .03333 hrs Computed Peak Time = 12.1667 hrs Computed Peak Flow = 4.31 cfs Time Increment for HYG File = .0500 hrs' Peak Time, Interpolated Output = 12.2000 hrs Peak Flow, Interpolated Output = 4.27 cfs DRAINAGE AREA ID:6TH STREET CN = 84 Area = 1.060 acres S = 1.9048 in 0.25 = .3810 in Cumulative Runoff ------------------- 4.8460 in .428 ac-ft HYG Volume... .428 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .25000 hrs (ID: 6TH STREET) Computational Incr, Tm = .03333.hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.1432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(l+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 (solved from K = .7491) Unit peak, qp = 4.80 cfs Unit peak time Tp = .16667 hrs Unit receding limb, Tr = .66667 hrs Total unit time, Tb.= .83333 hrs Type.... Unit Hyd. Summary Page 6.02 Name.... 6TH STREET Tag: Design Event: 1 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Storm... TypeIII 24hr Tag: Design SCS UNIT HYDROGRAPH METHOD STORM EVENT: l year storm Duration = 24.0000 hrs Rain Depth = 3.5600 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - 6TH STREET Design Tc = .2500 hrs Drainage Area = 1.060 acres Runoff CN= 84 Computational Time Increment = .03333 hrs Computed Peak Time = 12.1667 hrs Computed Peak Flow = 1.80 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.2000 hrs Peak ======= Flow, ------------------------------------- Interpolated Output = 1.80 cfs DRAINAGE AREA ------------------- ID:6TH STREET CN = 84 Area = 1.060 acres S = 1.9048 in 0.25 = .3810 in Cumulative Runoff ------------------- 1.9879 in .176 ac-ft HYG Volume... .176 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .25000 hrs (ID: 6TH STREET) Computational Incr, Tm = .03333 hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.432 (37.46% under rising, limb) K = 483.43/645.333, K = .7491 (also, K = 2/(1+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 (solved from K = .7491) Unit peak, qp = 4.80 cfs Unit peak time Tp = .16667 hrs Unit receding limb, Tr = .66667 hrs Total unit time, Tb = .83333 hrs Type.... Unit Hyd. Summary Page 6.03 Name.... ON -SITE SYSTEM Tag: Check Event: 10 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Storm... TypeIII 24hr Tag: Check SCS UNIT HYDROGRAPH METHOD. STORM EVENT: 10 year storm Duration = 24.0000 hrs Rain Depth = 6.6900 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - ON -SITE SYSTEM Check Tc = .2170 hrs Drainage Area = 5.420 acres Runoff CN= 89 Computational Time Increment = .02893 hrs Computed Peak Time = 12.1520 hrs Computed Peak Flow = 24.86 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.1500 hrs Peak Flow, Interpolated Output = 24.82 cfs -------------------------------------------- DRAINAGE AREA ------------------- ID:ON-SITE SYSTEM CN = 89 Area = 5.420 acres S = 1.2360 in 0.25 = .2472 in Cumulative Runoff ------------------- 5.4058 in 2.442 ac-ft HYG Volume... 2.442 ac-ft •(area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .21700 hrs (ID: ON -SITE SYSTEM) Computational Incr, Tm = .02893 hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(l+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 (solved from K = .74.91) Unit peak, qp = 28.30 cfs Unit peak time Tp = .14467 hrs Unit receding limb, Tr = .57867 hrs Total unit time, Tb = .72333 hrs Type.... Unit Hyd. Summary Page 6.04 Name.... ON -SITE SYSTEM Tag: Design Event: 1 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Storm... TypeIII 24hr Tag: .Design SCS UNIT HYDROGRAPH METHOD STORM EVENT: 1 year Storm Duration = 24.0000 hrs Rain Depth = 3.5600 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - ON -SITE SYSTEM Design Tc = .2170 hrs Drainage Area = 5.420 acres Runoff CN= 89 -------------------------------------------- Computational Time Increment = .02893 hrs Computed Peak Time = 12.1520 hrs Computed Peak Flow = 11.50 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.1500 hrs Peak Flow, Interpolated Output = 11.48 cfs DRAINAGE AREA ID:ON-SITE SYSTEM CN = 89 Area = 5.420 acres S = 1.2360 in 0.25 = .2472 in Cumulative Runoff ------------------- 2.4127 in 1.090 ac-ft HYG Volume... 1.090 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .21700 hrs (ID: ON -SITE SYSTEM) Computational Incr, Tm = .02893 hrs = 0.20000 Tp Unit Hyd. Shape Factor 483.432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(1+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 (solved from K = .7491) Unit peak, qp = 28.30 cfs Unit peak time Tp = .14467 hrs Unit receding limb, Tr = .57867 hrs Total unit time, Tb = .72333 hrs Type.... Unit Hyd. Summary Page 6.05 Name.... POND AREA Tag: Check Event: 10 yr File.... G:,\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Storm... TypeIII 24hr Tag: Check SCS UNIT HYDROGRAPH METHOD STORM EVENT: 10 year storm Duration = 24.0000 hrs Rain Depth = 6.6900 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - POND AREA Check Tc = .1670 hrs Drainage Area = 1.570 acres Runoff CN= 77 Computational Time Increment = .02227 hrs Computed Peak Time = 12.1353 hrs Computed Peak Flow = 6.06 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.1500 hrs Peak Flow, Interpolated Output = 6.00 cfs DRAINAGE AREA ------------------- ID:POND AREA CN = 77 Area = 1.570 acres S = 2.9870 in 0.25 = .5974 in Cumulative Runoff ------------------- 4.0883 in .535 ac-ft HYG Volume... .535 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .16700 hrs (ID: POND AREA) Computational Incr, Tm = .02227 hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(1+(Tr/Tp)) Receding/Rising, Tr/Tp = 1.6698 (solved from K = .7491) Unit peak, qp = 10.65 cfs Unit peak time Tp = .11133 hrs Unit receding limb, Tr = .44533 hrs Total unit time, Tb = .55667 hrs Type.... Unit Hyd. Summary Page 6.06 Name.... POND AREA Tag: Design Event: 1 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Storm... TypeIII 24hr Tag: Design SCS-UNIT HYDROGRAPH METHOD STORM EVENT: 1 year storm Duration = 24.0000 hrs Rain Depth = 3.5600 in Rain Dir = G:\NF07\0179\Site\Drainage\ Rain File -ID = - TypeIII 24hr Unit Hyd Type = Default Curvilinear HYG Dir = G:\NF07\0179\Site\Drainage\ HYG File - ID = - POND AREA Design Tc = .1670 hrs Drainage Area = 1.570 acres Runoff CN= 77 Computational Time Increment = .02227 hrs Computed Peak Time = 12.1353 hrs Computed Peak Flow = 2.17 cfs Time Increment for HYG File = .0500 hrs Peak Time, Interpolated Output = 12.1500 hrs Peak Flow, Interpolated Output = 2.16 cfs DRAINAGE AREA ------------------- ID:POND AREA CN = 77 Area = 1.570 acres S = 2.9870 in 0.25 = ,5974 in Cumulative Runoff ------------------- 1.4752 in .193 ac-ft HYG Volume... .193 ac-ft (area under HYG curve) ***** SCS UNIT HYDROGRAPH PARAMETERS ***** Time Concentration, Tc = .16700 hrs (ID: POND AREA) Computational Incr, Tm = .02227 hrs = 0.20000 Tp Unit Hyd. Shape Factor = 483.432 (37.46% under rising limb) K = 483.43/645.333, K = .7491 (also, K = 2/(1+(Tr/Tp)) Receding/Rising, Tr/Tp = .1.6698 (solved from K = .7491) Unit peak, qp = 10.65 cfs Unit peak time Tp = .11133 hrs Unit receding limb, Tr = .44533 hrs Total unit time, Tb = .55667 hrs Type.... Vol: Planimeter Page 7.01 Name .... POND 20 File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW POND VOLUME CALCULATIONS Planimeter scale: 1.00 ft/in Elevation Planimeter Area Al+A2+sgr(Al*A2) Volume Volume Sum (ft) (sq.in) (acres) (acres) (ac-ft) (ac-ft) ------------------------------------------------------------------------ 12.00 28363.000 .6511 .0000 .000 .000 12.50 32902.000 .7553 2.1077 .351 .351 13.00 34725.000 .7972 2.3285 .388 .739 14.00 38649.000 .8873 2.5254 .842 1.581 15.00 46194.000 1.0605 2.9177 .973 2.554 POND VOLUME EQUATIONS * Incremental volume computed by the Conic Method for Reservoir volumes. Volume = (1/3) * (EL2-ELl) * (Areal + Area2 + sq.rt.(Areal*Areal)) where: ELI, EL2 = Lower and upper elevations of the increment Areal,Area2 = Areas computed for EL1, EL2, respectively Volume = Incremental volume between EL1 and EL2 a Type.... Outlet Input Data Name.... Outlet 1 Page 8.01 .File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW REQUESTED POND WS ELEVATIONS: Min. Elev.= 12.00 ft Increment = .25 ft Max. Elev.= 15.00 ft OUTLET CONNECTIVITY ---> Forward Flow Only (UpStream to DnStream) <--- .Reverse Flow Only (DnStream to UpStream) < --- > Forward and Reverse Both Allowed Structure No. . Outfall El, ft E2, ft Inlet Box RD ---> CO 13.000 15.000 Orifice -Circular 00 ---> CO 12.000 15.000 Culvert -Circular CO ---> TW 8.750 15.000 TW SETUP, DS Channel Type.... Outlet Input Data Name.... Outlet 1 Page 8.02 File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW OUTLET STRUCTURE INPUT DATA Structure ID = RD Structure Type = Inlet Box ------------------------------------ # of Openings = 1 Invert Elev. = 13.00 ft Orifice Area = 16.0000 sq.ft Orifice Coeff. _ .600 Weir Length = 4.00 ft Weir Coeff. = 3.000 K, Reverse = 1.000 Manning5 n = .0000 Kev,Charged Riser = .000 Weir Submergence = No Structure ID Structure Type --------------- # of Openings Invert Elev. Diameter Orifice Coeff. = 00 = Orifice -Circular ------------------ = 1 12.00 ft .2500 ft .600 Type.... Outlet Input Data Name.... Outlet 1 File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW ® OUTLET STRUCTURE INPUT DATA Structure ID = CO Structure Type = Culvert -Circular ------------------------------------ No. Barrels = 1 Barrel Diameter. = 2.0000 ft Upstream Invert = 8.75 ft Dnstream Invert = 8.50 ft Horiz. Length = 48.00 ft Barrel Length = 48.00 ft Barrel Slope = .00521 ft/ft OUTLET CONTROL DATA Mannings n = .0120 Ke = .2000 Kb = .010575 Kr = .2000 HW Convergence = .001 INLET CONTROL DATA... Equation form = 1 Inlet Control K = .0018 Inlet Control M = 2.0000 Inlet Control c = .02920 Inlet Control Y = .7400 T1 ratio (HW/D) _ .000 T2 ratio (HW/D) = 1.205 Slope Factor = -.500 Page 8.03 (forward entrance loss) (per ft of full flow) (reverse entrance loss) +/- ft Use unsubmerged inlet control Form 1 equ. below Tl elev. Use submerged inlet control Form 1 equ. above T2 elev. In transition zone between unsubmerged and submerged inlet control, interpolate between flows at T1 5 T2... At T1 Elev = 8.75 ft ---> Flow = 15.55 cfs At T2 Elev = 11.16 ft ---> Flow = 17.77 cfs Structure ID = TW Structure Type = TW SETUP, DS Channel ------------------------------------ FREE OUTFALL CONDITIONS SPECIFIED CONVERGENCE TOLERANCES... Maximum Iterations= 40 Min. TW tolerance = .01 ft Max'. TW tolerance = .01 It Min. HW tolerance = .01 ft Max. HW tolerance = .01 ft Min. Q tolerance = 00 cfs Max. Q tolerance = .00 cfs Type.... Composite Rating Curve Name.... Outlet 1 Page 8.04 File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW ***** COMPOSITE OUTFLOW SUMMARY **** WS Elev, Total Q Notes ---------------- -------- Converge ----------------- Elev. Q TW Elev Error ft cfs ft +/-ft Contributing Structures 12 00 00 Free Outfall (no Q: RO,OO,CO) 12.25 .08 Free Outfall OO,CO (no Q: RO) 12.50 .14 Free Outfall OO,CO (no Q: RO) 12..75 .19 Free Outfall O0,C0 (no Q: RO) 13.00 .22 Free Outfall OO,CO (no Q: RO) 13.25 1.75 Free Outfall RO,OO,CO 13.50 4.52 Free Outfall RO,OO,CO 13.75 8.10 Free Outfall RO,OO,CO 14.00 12.32 Free Outfall RO,OO,CO 14.25 17.11 Free Outfall RO,OO,CO 14.50 22.39 Free Outfall RO,OO,CO 14.75 28.12 Free Outfall RO,O0,C0 15.00 34.20 Free Outfall RO,OO,CO Type.... Pond Routing Summary Page 9.01 Name.... POND 20 . OUT Tag: Check Event: 10 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Storm... TypeIII 29hr Tag: Check LEVEL POOL ROUTING SUMMARY HYG Dir = G:\NF07\0179\Site\Drainage\ .Inflow HYG file = NONE STORED - POND 20 IN Check Outflow HYG file = NONE STORED - POND 20 OUT Check Pond Node Data = POND 20 Pond Volume Data = POND 20 Pond Outlet Data = Outlet 1 No Infiltration INITIAL CONDITIONS Starting WS Elev = 12.00 ft Starting Volume = .000 ac-'ft Starting Outflow = .00 cfs Starting Infiltr. _ .00 cfs Starting Total Qout= .00 cfs Time.Increment = .0500 hrs INFLOW/OUTFLOW HYDROGRAPH SUMMARY Peak Inflow = 30.83 cfs at 12.1500 hrs Peak'Outflow = 10.11 cfs at 12.5500 hrs ----------------------------------------------------- Peak Elevation = 13.87 ft Peak Storage = 1.466 ac-ft MASS BALANCE (ac-ft) -------------------------- + Initial Vol = .000 + HYG Vol IN = 2.976 - Infiltration = .000 - HYG Vol OUT = 2.933 - Retained Vol = .042 Unrouted Vol = -.001 ac-ft (.091% of Inflow Volume) WARNING: Outflow hydrograph truncated on right side. Type.... Pond Routing Summary Page 9.02 Name.... POND 20 OUT Tag: Design Event: 1 yr File.... G:\NF07\0179\Site\Drainage\ACADEMIC FACILITY.PPW Storm... TypeIII 24hr Tag: Design LEVEL POOL ROUTING SUMMARY HYG Dir = G:\NF07\0179\Site\Drainage\ Inflow HYG file = NONE STORED - POND 20 IN Design Outflow HYG file = NONE STORED - POND 20 OUT Design Pond Node Data = POND 20 Pond Volume Data = POND 20 Pond Outlet Data = Outlet.l No Infiltration INITIAL CONDITIONS Starting WS Elev = 12.00 ft Starting Volume = .000 ac-ft Starting Outflow = .00 cfs Starting Infiltr. _ .00 cfs Starting Total Qout= :00 cfs Time Increment = .0500 hrs INFLOW/OUTFLOW HYDROGRAPH SUMMARY Peak Inflow = 13.64 cfs at 12.1500 hrs Peak Outflow = .95 cfs at 14.4000 hrs ----------------------------------------------------- Peak Elevation = 13.12 ft Peak Storage = .835 ac-ft MASS BALANCE (ac-ft) + Initial Vol = .000 + HYG Vol IN = 1.283 - Infiltration = .000 - HYG Vol OUT = 1.245 - Retained Vol = .037 Unrouted Vol = -.001 ac-ft (.086% of Inflow Volume) WARNING: Outflow hydrograph truncated on right side SySi S Made By: pMS't-� Date: Job No: v�c �I?9��8 P3o�o7�l_L� Checked By: Date: Sheet No: C,kuk ve baAweev-v Yovtl7a-�( W�a.iv, ;Jor�{ weak it 'Pond J 1 (� 10 YR z1 Yon �Itat °�-S'Imt_ot �e..le. j'l tO -T' 12,15 13 , (P xs C -t- _ 12 15 Vw,, . 1�0.8 O�s e T 13. 4o (to-YR.) 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I, o Pvl w, "R:E6)' A Vr',&I- P IIION,..1: cat Pr_,A �� = 0,2 ���e: 1, Q- c.-I5 ORIFIC.0 DUCT I..G''C Z, �i� �{11 FILf3 c`{� -Cp it Vq jSct' . 01L.0 34- st �Y'l0'1D J�(J'034) 2q �015� = O � 11r a�5 U J �l Made By: Date: Job No: ® �yStls sChecked By: Date: Sheet No: CY�� Ccn ORIF�LE � � ('212 ZT O• Iq (c 5} �=1o,ioo�o�tq�) z9(o;ts' 0,321c� 5Q;11,,..�-I �a�1u-Y� � �ecomrrw�deet CP�b�,� 8. s�,ma.-E GPavov S" = 50% •i G' �leu lo,o i �ol. a,qG Q�•'�. n (All-ws 25 Q � II acclimw..-[> amei FJA^rrf L Min • 6a,,J S17.- = Lo fo(f�� r s m..` i, wall p, p, ✓ Imo' f�cas�lti �CWO.�LY'1Ylq &ii •1 vC L Ih1VW.� S,sO MAa, IJead 12,00 - 8,50 3,50 �4. •rrl,ucn9 Ik�l = n)a Iknd/3 s 3.5/3 • I,h Ori�wa A'ie�, A =(I�lZ1!' = 0,1gto S} 9 CD z 4 .F-" 8,5 '% Vet o.¢ AT., f� T �L = 1.4- A 4 (0- O c S (3400� -r�Y S" PVC TIPS @ )"v -TT 4 y .,,))Z = 100 J s T = 1,4- - 9.4 A Ali ld AC1EC engineering and constructing a better tomorrow May 21, 2008 TmnSystems Corporation Town Point Center 150 Boush Street, Suite 1000 Norfolk, Viiginia23510 Attention: Mr. Jerry Q. Jorge, Associate/Assistant Vice President SUBJECT: REPORT OF GEOTECHNICAL EXPLORATION PROPOSED ACADEMIC INSTRUCTION FACILITY CAMP GEIGER, CAMP LEJEUNE, NORTH CAROLINA MACTEC PROJECT NO.6468-08-2076 Dear Mr. Jorge: MACTEC Engineering and Consulting, file. (MACi'EC) is pleased to submit this report of our geotechnical exploration for the referenced project. Our services were provided in general accordance with MACTEC Proposal No. PROP-08-RALL-117 dated and authorized March 17, 2008. This report presents a review of the information provided to its, a discussion of the site and subsurface conditions„ and our recommendations. The Appendix contains a site location map, a boring location plan, and the results of our field and laboratory tests. ® The purpose of this exploration was to determine the subsurface conditions at the site and to provide recommendations for design of earth supported structures based on those conditions. The assessment of site environmental conditions or determining the presence of contaminants in the soil, rock, surface water or groundwater of the site was beyond the scope of this exploration. PROJECT INFORMATION The proposed acaderrc instruction facility will be constructed in the western approximate half of the site. East of the building will be parking areas and stormwater management basins. The proposed building will have a footprint of approximately 120 feet by 300 feet, will be two -stories high, and will be primarily concrete masonry unit construction. Wall loads are estimated to be approximately 7 to 8 kips per foot and column loads are estimated to be 150 kips. We understand that the finished floor will be approximately feet above existing grades. A gcotechnical exploration of the site was performed previously by GET Solutions, Inc. Their report dated May 10, 2007 presents the results of the exploration and recommendations for design of earth supported elements of the project. The exploration included soil test borings in the building and pavement areas, and a Cone Penetrometer Test (CPT) probe in the building area. EXPLORATION PROCEDURES MACTEC performed 3 test borings in the proposed building area and two borings in the stormwater management basin area. The boring locations were selected by MACTEC and ® MACTEC Engineering and Consulting, Inc. 3301 Atlantic Avenue • Raleigh, NC 27604 • Phone: 919.876.0416 • Pax: 919.831.9136 www.mactec.com TranSystems Corporation May 21, 2008 Page 2 of I I Proposer/ Academic huiruction Facility Camp Geiger, Camp Lejeune, North Carolina MACTEC Project No. 6468-08-2076 established.in the field by TranSystems Corporation. Prior to drilling a private utility locating. service was used to identify any utilities in the area of each boring. no borings in the building area were advanced using mud -rotary drilling procedures. The borings in, ,the stonnwater management basin area,viere advanced using hollow stem auger drilling, procedures. Samples were obtained by driving a 1-3/8 inch ID split -spoon sampler with a manual safety hummer in general accordance with ASTM D1586 specifications at 2.5- to 5-foot intervals. Representative portion's of the samples were scaled in glass jars and returned to our laboratory where they were visually classified in accordance with the Unified Soil Classification System. MACTEC will store the test boring samples, available for inspection, for a period of ninety.days after which time they will be discarded unless requested otherwise. In -situ permeability tests were performed at the locations of A-4 and A-5 using the Guelph Permeameter. The tests were performed approximately 2 feet below grade. The test boring records showing visual descriptions of all soil strata and the sampling and field test data are included in the Appendix, information sheets describing the Unified Soil Classification System and the terms and symbols used on the boring record are also included. The ground surface elevations indicated on the boring logs were provided by TranSystems. The evaluation and recommendations presented in this report were developed from an interpretation of the general subsurface conditions at the site based on information obtained from the .soil borings. The stratification lines indicated on the.boring logs represent the approximate boundaries between soil types. In -situ, the transitions may be gradual. Selected samples were tested in the laboratory to determine their physical properties and engineering characteristics. The laboratory program included natural moisture content, Atterberg limit, and percent passing the number 200 sieve tests. All testing was done in general accordance with applicable ASTM specifications. The results of these tests are included in the Appendix. SITE AND SUBSURFACE CONDITIONS The site is bordered on the north by 6".Street, on the east by E Street, on the south by 7" Street and on the west by C Street. The. site is fairlylevel with very minor slope and drainage to the cast. Maximum relief between boring locations is approximately 3 feet. Currently, portions of the site are grass covered with sparse trees, An asphalt -surfaced tennistbasketball court is located in the center of the site and a concrete slab exists in the southeastern corner of the site. Jacksonville, North Carolina is located in the Coastal Plain Physiographic Province. The Coastal Plain consists mainly of marine sediments which were deposited during successive periods of. Fluctuating sea level and moving shoreline. The formations dip slightly seaward and several arc exposed at the surface in bands paralleling the coast. Many beds exist only as fragmental erosional remnants sandwiched between more continuous strata above and below. The soils in this province are typical of those laid down in a shallow sloping sea bottom; sands, silts, and clays with irregular deposits of shells. Some of the existing formations contain predominantly plastic clays interbedded with strata of sands and poorly consolidated limestones. Others contain predominantly sands and chalky or porous limestones with local lenticular deposits of highly plastic clays. MACTEC TranSysterns Corporation Proposed Academic Instn,ohm Facility blay 27, 2008. Camp Geiger, Camp Lejeune, North Carolina Page 3 of I I MACTEC Project No. 6468-08-2076 The borings encountered approximately 6 to 12 inches of topsoil at existing grades. In borings A-2, A-3 and A-5, medium dense silty and clayey sand was encountered extending to 1.5 to 3.5 feet below present grades. The soil is possible fill associated with past land usage. The surface soils in borings A-1, A-2 and A-3, drilled in the proposed building area, are underlain by clayey and silty sands, and sandy silts extending to approximately 23.5 to 28.5 below existing grades. The relative density of the sands in this depth interval varies from loose to medium dense. The silt is very soft: In borings A-4 and A-5, the topsoil and possible fill are underlain by clayey silt extending to about 3.5 to 6 feet below present grades, The sili in these borings is underlain by silty and clayey sands similar to the sands encountered in the borings drilled in the building area. Medium dense to dense fine to coarse sand was encountered at 23.5 to 28.5 in borings A-1, A-2 and A-3, and extends to the depth explored in these borings. Some limestone fragments were encountered in the samples recovered from this depth interval. The CPT probe performed during the GET exploration indicates the medium dense to dense sands extend to approximately 72 feet below presenrgrades, underlain by sand mixtures extending to 100 feet, the maximum depth explored. Groundwater level readings at completion of the borings A-1, A-2 and A-3 were not obtained since drilling slurry or "mud" was used in performing the borings and, consequently, a water reading at time of completion is meaningless. Based oil observation of samples in these Borings we estimate the groundwater table is approximately 3.5 to 6 feet below present grades. Upon completion of drilling, the groundwater was measured at 5 feet below grade in borings A-4 and A-5, drilled with hollow stem augers. Fluctuations in the location of the groundwater table may occur depending on variations in precipitation, evaporation and surface water runoff. RECOMMENDATIONS The subsurface conditions encountered in this exploration are generally consistent with those described in the GET Solutions, Inc. report. Both explorations indicate variable amounts of fill and possible fill within the building area, underlain by loose sands to approximately 23.5 to 28.5 feet and medium dense to dense sands below that depth. MACTEC borings drilled in the stormwater management basin area encountered clayey silts to approximately 3.5 to 6 feet below grade. These soils are more plastic than the surface soils reported in the GET boring logs. Our analyses indicate that the loose sands below the groundwater table are potentially liquefiable during the design earthquake event; therefore, seismic Site Class F is applicable in accordance with the North Carolina Building Code. Mitigation to densify the loose sands, supporting the structure on deep foundations or designing the structure to accommodate the liquefaction settlements will be required. Presented in the following sections are further discussions of the seismic evaluation and foundation options, and our recommendations for design of earth supported elements of the project. NIAIMACTEC TranSystems Corporation Proposer! Academic Instruction Facility May 21, 2008 Camp Geiger, Camp 4jeune, North Carolina Page 4 of I l AIAC7'F,C Project No. 6468-08-2076 Seismic Evaluation For the southeast region of the United States, large historical earthquakes occurred in New Madrid, Missouri in 1812 and in Charleston, South Carolina in 1886. The Charleston area is the most significant contributor to seismic site risk within the region, The determination of the seismic Site Class is based on the North Carolina Building Code, 2006 Edition, which incorporates the 2003 International Building Code. The basis of the Site Class is the average soil shear wave velocity in the top,100 feet of the profile. The shear wave velocity was determined at approximate 5-foot intervals to 100 feet below grade in the CPT probe performed during the GET exploration.. Using the building code methodology and the shear wave velocity test results, Site Class D is applicable for the profile before considering liquefaction potential. Liquefaction is a phenomenon that can occur during an earthquake when loose sands are present below the groundwater table. The borings indicate that loose sands exist from the groundwater table at about 5 feet to depths of 23.5 to 28.5 feet below present grades. When liquefaction is possible, the building code requires that Site Class F be assigned to the profile. Further, for soil profiles with Site Class F, the code requires site -specific response analysis, evaluation of the impacts of. liquefaction, and discussion of mitigation.measures. The building code provides an exception for structures having fundamental periods of less than 0.5 seconds. We anticipate that the fundamental period of the proposed two-story structure may be less than 0.5 seconds, but this should be confirmed by the structural engineer. If the fundamental period is less than 0.5 seconds, the site coefficients F. and F, may be determined in accordance with Table 1615.1.2(I) and Table 1615.1.2(2) of the building code for the applicable site class; D for this site. Even though the site coefficients can be determined front the table, liquefaction impacts and mitigation measures must be evaluated. To evaluate, Iiquefaclion potential at the site, we used the seismic hazard and associated ground motion values for the 2%PE50yrs, (2 percent probability of exceedance in 50 years) earthquake event obtained from the USGS. website (lido://geohazards.cr.usgs.gov) to establish a target response spectrum on a fictitious outcrop of rock having shear wave velocity V, of 2,500 feet per second. Using the 2%PE50yrs earthquake, our analyses indicate that the loose sands between the groundwater table and depths of approximately 23.5 to 28.5 feetarepotentially liquefiable during the design earthquake event. Based on these analyses, Site class F is applicable for the site. As noted above, the code requires evaluation of the consequences of liquefaction for soil profiles having Site Class F designation. During liquefaction, shear waves cause strain reversal that lead to the generation of excess pore water pressures in loose sands below the groundwater table, and the sands lose shear strength and behave as Fluid. Following the earthquake event, the liquefied soils reconsolidate. Based on the N-value data, we estimate that post -liquefaction settlements of surface - supported elements may be on the order of 2 to 5 inches. The borings indicate there is a variation in the thickness and in -situ density of the sands across the site; therefore liquefaction -induced settlements may not be uniform across the site. The 2%PE 50yrs earthquake used to evaluate liquefaction potential is a life safety design condition, not a condition where damage to the facility must be prevented. Therefore, the structural designer �MACTEC 7YnnSy.rtetns Corporation May 21. 2008 Page S of I Proposed Academic Instruction Facilile Camp Geiger, Camp Lejeune, North Carolina MACTEC Project No. 6468-08-2076 should evaluate the liquefaction impacts to determine that the building is sufficiently designed to. protect against collapse during the'earlhgiake. Even though the; site coefficients can be determined for Site Class D (assuming the fundamental - period of the structure is less than 0.5 seconds), the potential effects of liquefaction must still be addressed. Approaches to design for sites with soils having liquefaction potential include: 1. Improving, the soils having a liquefactionpotential to be resistant to liquefaction and supporting the building on the improved' soils with normal shallow foundations and conventional slabs -on -grade; 2. Supporting structure and floor loads on a deep foundation system designed to accept the additional loads due to liquefaction; and 3. Designing the structure to accommodate the effects of liquefaction sufficiently to prevent building' collapse during .the earthquake event and support the -structure on shallow foundations. This approach could leave the building unusable after the design earthquake. Liquefaction Mitigation Methods Methods to densify the potentially liquefiable loose sands include dynamic compaction, vibro- compaction, and vibro-replacement.. Following are descriptions of each of these methods and our evaluation of their applicability to this site. Dynamic compaction is typically done by dropping a large weight in a grid pattem throughout the footprint of the.proposed structure. Grid spacing.is dependent on the depth of densification needed and the energy applied. Due to the depth of the potentially liquefiable sands at this site and,the high silt and in the near surface soils, dynamic compaction will not, be effective. Compaction energy will not be sufficient to densify the lower loose sands at the site. Vibro-compaction (also know as vibroflotation) is a method of densifying sands using a vibrating probe. The probe is jetted to the depth required -and then extracted slowly while vibrating and adding sand into the hole. Vibro-compaction is most effective in sands containing less than approximately 5. percent silt and clay fines. Based on the results of the laboratory tests, vibro-compaction will not be effective due to the silt and clay content in the soils. Vibro-replacement is similar to vibro-compaction except that once the probe has been inserted to the desired depth, stone is introduced to the bottom of the probe and densified with vibration. Additional stone is added as the probe is raised resulting in a column of compacted stone. During compaction of the stone, densification of the surrounding soils occurs. Stone columns can be used in loose sands containing appreciable silt and clay fines, and also in stratified profiles where silt and clay layers occur. Stone columns are typically installed in a triangular pattern on 6 to 10-Foot spacings. Closer spacings are generally used beneath wall and column footings. The stone columns generally extend outside the building footprint approximately''/2 the depth densified. Earthquake drains could also be used to minimize the potential for liquefaction of the loose sands. Earthquake drains are large -flow capacity, synthetic, vertical drains installed with a vibrating mandrel into loose sands. The purpose of the earthquake drains is to allow rapid dissipation of the excess pore water pressures that occur.in loose sands below the groundwater table during an earthquake. During installation of the earthquake drains there is very little densification of loose soils surrounding the MACTEC TrrmSm'tems Corporation Proposed Academic lnstruclion Facility May 2l, 2008 Camp Geiger, Canip Lejeune, North Carolina Page 6 of I I MAMIX Project No. 0408-08.2076 drain. -Therefore during the design earthquake, some settlement of the sands may occur.. We estimate the settlement of surface supported elements may be on the order. of.%z to I /i inches with earthquake drains installed. Foundation Options Based.on the subsurface conditions at the site and applicable liquefaction mitigation methods, the. following are possible foundation options for the; proposed structure: • Construct stone columns to mitigate the potentially liquefiable soils and support walls, columns and slabs on the improved soils using conventional shallow footings and slab -on - grade construction methods. • Construct stone columns only beneath wall and 'column footings with none beneath Floor slabs. A conventional. grade support slab couldbe used; however during the design earthquake event settlement of the slab and any underlying utilities could occur. • Install earthquake drains throughout the building area to'minimize liquefaction -induced settlements and support the structure on shallow footings with conventional grade -supported slabs. The building would need to be designed to accommodate the residualsettlements ('/2 to I /s inches) that may occur during the design earthquake event even with earthquake 'drains installed. • Construct a pile foundation system to support walls, columns and structural floor slabs. The piles would need .to be designed to resist forces that would occur during the design earthquake. • Construct pile foundations to support only walls and column. A conventional grade - supported slab could be used; however, during the design earthquake event settlement of the slab and any underlying utilities could occur. • Design the building to accommodate the liquefaction -induced settlements and not collapse, and use conventional shallow depth footings and grade -supported slabs. This option may leave the building unusable following the design earthquake event. Specialty contractors should be consulted for design and construction of stone columns and earthquake drains. We can provide names of specialty contractors if requested. Site Preparation All topsoil, vegetation, debris, and other unsuitable material should be removed from the construction area and either wasted from the site or used as topsoil in areas to be landscaped. We estimate a stripping depth of about 6 inches will be required to remove topsoil. The concrete slab in the southeastern corner of the site and the tennis/basketball court asphalt should also be removed from the site. Special care should be taken to ascertain that all existing foundations, slabs, and any other underground structures that may have existed in the area or the proposed structure are removed from the construction area. As discussed above, some fill and possible fill exists on the site. During stripping of topsoil, the subgrade should be observed to determine if any additional undercutting of existing fill is required. Following stripping, we recommend that the exposed subgrade in the building and pavement areas be proofrolled to detect unsuitable soil conditions. Proofrolling should be done after a suitable period of MACTEC 'franSystenu Corporation - May 21, 2008 Page 7 of I Proposed Academic Instruction facility Cap Geiger, Camp Lejeune, North Carolina MACTEC Pt aject No. 6468-08-2076 dry.weather, to avoid degrading an otherwise acceptable subgrade: Proofrollingshould be performed with a heavily loaded dump truck or with similar approved construction equipment. The proofrolling equipment -should make at least four passes over each'section, with the last two passes perpendicular to the first two: We recommend that the exposed subgrade and proofrolling-operation be observed and documented by the geotechnical engineer. If unsuitable 'conditions`are encountered at the subgrade level, recommendations for dealing with the condition's should be provided to the owner's representative by the geotechnical• engineer. Soils which nit or deflect excessively during proofrolling should be undercut to suitable soils and replaced with compacted soil fill or crashed stone. The near surface soils on the site that may he excavated can be re -used for compacted fill on the site; however, these soils have high silt and clay contents and are currently very moist. Aeration of the soils will be required for best compaction results. These soils will be very difficult to work with during the wetter seasons of the .year. Moisture related soil difficulties can be minimized by performing site preparation work in the drier periods of the year (May through October). We recommend that any off -site fall required be sand or sand and gravel material containing less than 20 percent silt and clay fines. All fill should be placed in 8 to 10 inch loose lifts and shouldbe compacted to at least 95 percent of the modified Proctor maximum dry density (ASTM D 1557). The upper 12 inches below'pavements and -slabs -on -grade should be compacted to 98 percent modified Proctor. In -place field density tests should be performed by the geotechnical engineer or technician. We recommend that field density tests be performed every 2,500 square feet with at least one test performed on each lift of material: We recommend that all finished cut and till slopes be no steeper than 3H:1 V. Pill slopes should be constructed by overfilling and then trimmed back to final configuration. The slopes should be seeded and mulched as soon as practical after grading to minimize erosion. The near surface soils at this site classify as Type C in accordance with current OSHA Trench Protection Guidelines. Trench excavations more than 4 feel deep should be supported with temporary shoring and bracing or cut back on slopes of 1.5(H): I (V). The grading of the site should be coordinated with contractors constructing earthquake drains, stone columns or pile foundations. Repair to the subgrade will be required after installation of any of these mitigation measures. Dewatering will be required for excavations that extend more than about 3 to 6 feet below present grades. The extent of dewatering will depend on the area and depth of the excavation. Pumping from sumps on the interior of excavations may be adequate for small excavations. Well point systems may be needed for deeper and larger excavations. No percolation occurred in the field permeability tests performed at depths of 2 feet below present grades in the.area of the stomtwater management ponds. Based on descriptions of the soil, we estimate the permeability is approximately 10-s to 10 ° cm/sec. MACTEC TranSystems Corporation Proposed Academic Instruction Facility May 21, 2008 Camp Geiger, Camp Lejeune, North Carolina Page of II „ MACTFC Project No. 6468-08-2076 Shallow Foundations Shallow.depth footings.canbe used if the structure is designed to accommodate liquefaction -induced settlements,' or if stonecolumns or earthquake drains are installed. The footings can hear in undisturbed natural soils or fill placed and compacted as recommended above. All exterior footings should be located at least 18 inches below final exterior grades to provide frost protection. Interior footings may be embedded only nominal depths if in an area that will not be.subject to frost heave. Minimum footingwidths of to inches for wall footings and,24 inches for column footings are recommended. We recommend that the geotechnical engineer or technician observe the footing excavations immediately prior to placing concrete. He should compare the soils exposed with those encountered in the soil test borings.and see that the exposed soils are capable of supporting the design footing pressure: Any soft or loose soils should be undercut to suitable materials and backfilled with approved soil fill materials, clean stone, or lean concrete.. Soil hackfill should be compacted as described above. Allfoundation bearing areas should be level or suitably benched and free of loose soil, ponded water and debris. Exposure to the environment may weaken the soils at the footing bearing .level if the foundation excavations remain open.for long periods of time. If the bearing soils are softened by surface water intrusion or exposure, the softened soils must be removed from the foundation excavation bottom immediately prior to placement of concrete. If the structure is designed to accommodate liquefaction -induced settlements or if earthquake drains are installed, we recommend that the footings be designed for it net allowable soil bearing pressure of 2,000 pounds per square foot (psf). We estimate that settlement of footings due to dead and live loads of the structure (i.e., not associated with liquefaction -induced settlement) will vary between'/a and 1-'/4 inches. We anticipate that the majority of this settlement will occur during construction and initial application of structure loads resulting in very little post construction settlement. An allowable bearing pressure of 4,000 to 5,000 psf can probably be used if stone columns are installed. Since the soil is densified during construction of stone columns, settlement of footings under dead and live loads of the structure will be less than estimated above. The stone column specialty contractor should be consulted for his estimate of allowable bearing capacity and foundation settlement. Pile Foundations The following are preliminary recommendations for evaluation of pile foundations. The estimated lengths of piles required are based on assumed subsurface conditions below 50 feet, the maximum depth explored in the test borings. Additional borings should be drilled if piles are considered for support of the building. As an alternative to liquefaction mitigation, the proposed structure can he supported on a pile foundation system. As discussed above, during liquefaction shear waves cause strain reversal that lead to the generation of excess pore water pressures in loose sands below the groundwater table, and the sands lose shear strength and behave as Fluid. Therefore, in our analysis we have assumed that there is no compression pile capacity developed in the potentially liquefiable zone. ®�MACTEC TranSysiem.s Corporation Proposed Acnde.+nir. Instf action Facility May 21, 2008 Comp Geiger, Camp l xjeune, Nosh Carolina Page 9 of 11 " MACTEC project No. 668-08-2076 Compression pile capacity will be developed through skin friction in the upper sands and the lower sands below the, liquefiable zone, and end bearing in -the medium dense sands below approximately 28 feet, We estimate that low capacity, piles will be adequate based on the wall and column loads provided. Assuming a wall load `of S+kips per foot, we estimate 20 ton piles with a pairof-pilesspaced every 10'feet wilt be adequate. Three,25 ton'piles will:be'adequate to.support the proposed 150 kip column loads. We estimate timber piles approximately 55 feet long will develop 25 ton allowable capacities. Pipe piles, 10 inches in diameter and approximately 50 feet long will develop25 ton allowable capacities. Adgereasrpiles 14 inches in diameter and approximately 40 feet long will develop 25 to allowable capacities. As noted above, additional exploration and analysis are required for final design if a pile foundation system is selected to support the proposed structure. Slabs -on -Grade Grade supported slabs can be used for several of"the foundation options discussed above. The slab subgrade should be prepared as outlined in the Site Preparation section of this report. A minimum 4-inch thick layer of washed stone or stone and coarse sand, as well as a suitable moisture barrier, should be provided beneath all slabs to prevent capillary rise and a damp slab. The grade slab should be jointed around columns and along footing -supported walls, so that the slab and foundations.can settledifferentially without damage. Joints containing dowels or keys may be used in the slab to permit rotational movement between parts or the slab without cracking or sharp vertical displacements.. Based on the characteristics of the near surface soils at the site, we recommend that a subgrade modulus of 150 pounds per cubic inch (pci) be used for design of the slab. Construction activities and exposure to the environment may cause deterioration of prepared subgrades. Therefore, we recommend that density and moisture content tests be conducted on the final subgrade soils immediately prior to grade slab construction to determine their condition. Pavements California Bearing Ratio (CBR) tests were performed by GET Solutions during the 2007 exploration. Based on the laboratory test results, they recommended it CBR value of 9.for design. of Flexible pavements. In our opinion, this is a reasonable value to use in design based on descriptions of on -site soils that may form pavement subgrade. We estimate a subgrade modulus of 150 pci for rigid pavement design is applicable for these materials. The subgrade in pavement areas should be prepared in accordance with the recommendations presented in the Site Grading section of this report. Traffic volumes for pavement thickness design were provided by TranSystems Corporation as follows: • 250 vehicle parking lot capacity • Vehicles entering and exiting the lot twice per day • Assume 40 % pickup trucks, 40 % automobiles, 20 %n Humvees • 1 dumpster truck per day MACTEC Trnn.Sys(erns Corporation Proposed Academic Instruction Faeiliry May 21, 2008 Camp Geiger, Camp l.ejeune, Nord, Carolina Page 10 of l I MACTEC Project No. 6468-08-2076 • Several two axle, 6-tired trucks per day (delivery vans) Based on the above traffic and subgrade conditions, we recommend the following possible pavement' thicknesses and configurations over the prepared subgrade: Pavement Type - . Material - - Thickness (inches) . Light -Duty Heavv-Du[ Rigid Concrete - 6 Aggregate Base Course (NCDOT Type A or B) - 6 -Flexible Asphalt Concrete —Surface (NCDOT S9.5X --02 1 Asphalt Concrete — Base (NCDOT 119.OX) - 2 Aggregate Base Course (NCDOT Type A or B) - 6 - 6 The subgrade in pavement areas should be prepared as recommended in the Site Preparation section of this report. Pavements and bases should be constructed in accordance with the guidelines of the latest applicable "Standard Specifications for Roads and Structures", North Carolina Department of Transportation. Materials, weather limitations, placement and compaction are specified under appropriate sections of this publication. Prevention of infiltration of water into the subgrade is essential for the successful performance of the pavement. Both the subgrade and the pavement surface should have a minimum slope of one -quarter inch per foot to promote surface drainage. Edges of the pavement should be provided a means of water outlet by extending the aggregate base course through to side ditches or providing drain pipes. Additional Services Recommended. 1. Site Preparation and Pmofrolling: The geotechnical engineer or technician should observe the site after it has been stripped and excavated. The engineer should determine the extent of undercutting or in -place densification necessary to prepare the subgrade for fill placement or for slab support. 2. Fill Placement and Compaction: The geotechnical engineer or technician should observe any required filling operations and take sufficient in -place density tests, approve borrow materials used and determine if their existing moisture contents are suitable. 3. Footing Excavation Examination: The geotechnical engineer or technician should examine the footing excavations for the building foundations. He should check that the design bearing pressures recommended are available and that no soft soils exist beneath the bearing surface of the footing excavations. Based on the examinations, the engineer would either approve the bearing surface or recommend that unsuitable soils be undercut to expose satisfactory bearing materials. 4. Pavement System Examination: Pavement subgrade soils and base materials should be examined by the geotechnical engineer or technician prior to placement of the asphaltic concrete to 1VIACTEG TranSysterns Corporation Proposed Academic Instruction Facifiry May 21, 2008 Camp Geigcr, Camp Lejeunc; North Carolina Page. 1 f of f 1- - WAC7'1,'C Project No. 0408-08-2076 determine that proper compaction has-been achieved and that project specifications are being followed. California Bearing Ratio (CBR) tests should be performed on representative samples of the subgrade soils in order to develop a -suitable and economical pavement section. 5. Pile Installation: The geotechnical engineer or technician should monitor the pile installation to record all -aspects of the installation and to evaluate the installation observations with respect to the subsurface conditions as the basis for accepting or rejecting each pile. CLOSING These analyses and recommendations are, of necessity, based on the concepts made available to us at the time of the writing of this report, and on -site surface and subsurface conditions that existed at the time of the exploratory borings. Further assumption has been made that the limited exploratory borings, in relation to both the area extent of the site and depth, are representative of conditions across the site. If, during the design phase-, or later construction phases, conditions are encountered which differ significantly from those reported herein, we should be immediately notified so that our analyses and recommendations can be reviewed and/or revised as necessary. We appreciate the opportunity of providing our services to you during the exploration phase of this project and look forward to assisting you during the construction phase as well. If you have any questions concerning'this report or any of our testing, inspection design or consulting services please do not hesitate to contact us. Respectfully submitted, M CTEC ENGINEERING AND CONSULTING, INC. James E, Veith, P.E. (Engineer of Record) Principal Geotechnical Engineer g Registered, North Carolina 023232 L Stephen J. Criscenzo, P,E. (Reviewer) Chief Engineer 'Registered, North Carolina 16507 Attachments v MACTEC Academic Instruction - aC yJCNim Ca 1 \ Yilr.n II �4 1.11 L. \7� �ANIr t,� /a r Ile CM r Cvrr t� N /r JOClum 911feM lµ:.. u<r I 4 Sollllla al I,y. � 151 � k �� �- )� aYl'' v r . I t. w,an P.a III�L[4 rvlel a j . a Hn.Nen Cv�ra:l / �� �_rJI V, _ !vdne Ural tY n'ua.ou rr..a \�Is,rsY na IIIj /I lrir<r \ 1 hl Itr"xrc leIT:-np, LQOQND Sale 1:62,5w (at ccnla) Slam Romc oSlazc Romf Imil. Mag li nll It G Faturc o US HiCh.y Fri Mar 21 10.39.34 2008 Town, Snell City .—I.- RailraW 2 RM Y Hill Riva US Ilighway — la%ermncnl Niw Populalial Cclncr — A&(dd _ St w, Road . _ _ - Utility (powmllm) ,p p` 11wy len,i Mass Mnja StrmURoed Op R'ala V MACTEC SITE LOCATION MAP RALEIGH. NORTH CAROLINA PROPOSED ACADEMIC.INSTRUCTION FACILITY DRAWN: DATE: Aril 15, 2008 CAMP GEIGER OFT CHECK: 17 SCALE: As Shown JACKSONVILLE, NORTH CAROLINA ENG CHECK: JOB: 6468-08-2076 APPROVAL: Sdi� FIGURE: 1 REFERENCE: DELORME MAP EXPERT "u PROPOSED ACADEMIC INSTRUCTION FACILITY CAMP GEIGER JACKSONVILLE, NORTH CAROLINA NMACTEC 25 4- 1 ..... ........................ ........ - A . -2 ................................................... ........................... .......... ....................................... .................... .......... .. . . n ;4w A-3 A-4 A-5 .......... .................. ............ 1s70 14,W .......... ...... ............ ......... ............ - ........ . ......... 15 ................... ................. .......... ............... - .... .. .. ......... .. .................................................... ............................................. ....... ........... .. ... .......... . .... .. .. ............... ........................ ................ ...................... ........ ............ ................................................. ...... 0 .................................................... 41 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........... ......................... ................................................. ............................................ fF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......... ........... . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . ... ............ . . . ... . . . . . . . . .......... . .......... . .. . ..... . . . . . . 'o . . . . . .................... .......................... ................................ .... .. ...... ................................... ................... ............. ........... MATERIAL LAYERING CODES B-1 BORING NO. El SUBSURFACE PROFILE NA Ell— f/MACFEC MAJOR DIVISIONS CLEAN GRAVELS GRAVELS (Little or no fines) (More than 50%of coarse fraction is LARGER then the GRAVELS COARSE No. 4 sieve size) WITH FINES GRAINED (Appreciable SOILS amount of fines) (More than 50%of material is CLEAN' LARGER than No. 200 sieve size) SANDS SANDS (More than 50%of (Lisle or no fines) coarse fraction is SMALLER than the No. 4 Sieve SANDS WITH Size) FINES (Appreciable amount of fines) GROUP-1TYPICAL NAMES G W Well graded gravels, gravel - sand mixtures, little or no fines. GP Poorly graded gravels or grave - sand mixtures, little or no fines. GM I Silty gravels, gravel - sand - silt mixtures GC Clayey gravels, gravel - sand - clay mixtures. SW Well graded sands, gravelly sands - little or no fines. Poorly graded sands or gravelly sands, SP little or no tines, SM I Silty sands, sand - silt mixtures SC Clayey sands, sand - clay mixtures. Inorganic silts andvcry fine sands, roc ML .flour, silty of clayey fine sands or clayey SILTS AND CLAYS CL inorganic lays m low to mcuwuni piaeucn), ravelly clays, sandy clays, silty• clays, FINE (Liquid limit LESS than 50) an cla s. — OL Organic silts and organic silty clays of low GRAINED SOILS plasticity. (More than 50%of material is M} I Inorganic silts, micaceous or diatomaceous SMALLER than fine sandy or silty soils, elastic silts. CH Inorganic clays of high plasticity, fat clays No.200 sieve size) SILTS AND CLAYS - (Liquid limit GREA"fER than 50) OH Organic clays of medium to high - plasticity, organic silts. HIGHLY ORGANIC SOILS PT Peat and other highly organic soils. BOUNDARY CLASSIFICATIONS: Soils possessing characteristics of two groups are designated by combinations of group symbols. SILT OR CLAY SAND GRAVEL Cobbles Fine I Coarse Boulders Fine Medium Coarse No.2UU NOAV NOAU NOA d/4S 14 U.S. STANDARD SIEVE SIZE Reference: The Unified Soil Classification System, Corps of Engineers, U.S. Anny Technical Memorandum No. 3-357, Vol. I, March, 1953 (Revised April, 1960) Undisturbed Sample Split Spoon Sample Rock Core Dilatometer Packer - Water Table at time of drilling Correlation of with Relative L Fill Bulk Sample Limestone Pressure Meter No Recovery Water Table after 24 hours and <4 Very Loose <2 4 - 10 Loose 2-4 0 - 30 Medium Dense 4-8 -0 - 50 Dense 8 - P > 50 Very dense 15 - 3 > In Hard KEY TO SYMBOLS AND DESCRIPTIONS n I F. T H, (fl) 0 SOIL CLASSIFICATION AND -REMARKS S11 KEY$YMIIGI.SHIiI:TlOR I:XI'L.\N \TIUN (IP SYNIBOIS AN[)ABBREVIATIONS BI-LOW.. L G P N U i li V (IB _ 17.2 sAMPLES rL(%a) - Ill 211' ;iU ♦.I1NESET) 0 411 Nn;(r4 srrmt $I. 60' ) 711 Nn ran 'XI'IIMI U r T Y F., N-C( w Rcc„/l(QD9 —. •., o. .rutwd L'.. SS-1 4.3.3 .. Grin at G to 7,5 (cm .S ., SS-0. x 6.34 Yary wfi.. ,vt. tan, sandy SICr (M1;) IU— 7.2 SSS 1-LI ♦C 10 I-onsc, wt. gray: Iiw SAND (SI') SS-6 X 4-3.4 [A ap 7S SS-7 2Q :7 20 Tm e him mm fr pma, al 23.5'fcm. . .7.8 SS-8 LIS — S \ Medium drat-w.IM1, Bray: ftm In marsc SAND (SP) with line 70 g r:l\tiI and rmC It:lgnualls -12.3 SS-9i 74-1') 311 Ruing mminandat.10 li'cl. 35 --17.II_ 35 _—_ _ — 40 -22.,S 10 DRILLER. Carolmu Drilling EQUIPMENT: CM645, manual hainmer METHOD: Mud mmry RULE DIA.: 4' REMARKS: Groundwater at 6 rein based on sample observation. THIS RECORD IS A REASONABLE INTERPRETATION OF SUBSURFACE CONUrrIONS AT THE EXPLORATION LOCATION SUBSURFACECONDITIONS AT OT(1ER LOCATIONS AND AT OTHER TIMLS MAY DIFFER, INTERFACES BEWELN'STRATA ARE APPROXIMATE. TRANSITIONS BEErWEEN STRATA MAY BE GRADUAL, II 111 211 3q •IU Ill Ut M NO 90 IUI) 1 r. r Project: Academic Instruction Facility Boring No.: A-1 Drilled: May 2, 2008 Project k: 6468-08-2076 Page I of I L_NMACTEC D pr. T H . 0 SOIL CLASSIFICATION .. AND REMARKS SHE KEYSYNIBOLS11EFI FOR EXPLANATIONOF SYkillOI_CANIIAIII1RI:VlA'I'IONSNIiLOW. h I- G. fi N D E I, E V (0) 1 i.R SAMPLFS IIll. I(1 Nni(is) LL(%) 1 CN1 I) 'N -T 'f... Y 1' I: N-COUNrf nr. I2cc:f/12QD`L- �'.',a ;� �.• _. ..7 c . $ H 0 30 -.''A • 40 NNIiS Slrf 50 o (•3.) fhpil (d) 70 SO (a 90 '1'o rafil SS-1 x 7-9.8 Mc(li it Jenm: to:oisr tan and hro,vn. silly tincSAND (SM) - (ftimsihle till)' SS-2 X J-5.7 Klediwn dcm%uet. hro(nt and tall-gmy, silty Iitm SAND - - i (SR-SM) xith Iim(stmw fragux;mc at 3.5 feel _ �.^:. , . 12 R SS-i x 6>54 5 RS-I J-3-1 10 7.S SSS �1.5.5 ♦ 10 IS 2.8 SS-6 2.2,3 IS — 20 22 S&7 x 4-9-10 0 \, Vcn• dense ro nxditm dgnsr, wet. tight gray, lint, Cocoa. 23 SAND (SP) W41,povi NMI linwsomu: tragawal, - .7.2 Ss ]7-1422 i5 30- I_._ ss< n:In.la • — — lU taring tcnnioamd at 30fict 15 .17.2 t5 — --- -- JU _2.2 J0 DIULLER: Carolina Ihilllog EQUIPMENT: CMF. J5, mmnual 6ninn.er METHOD: Mull rotary HOLE DIA.: a" REMARKS: Groundwater at 3.5 feet based con sample obs,,mimi. THIS RECORD IS A REASONABLE IN'I'ERPREI'ATION OF SUBSURFACE CONDITIONS AT THE EXPLORATION LOCATION. SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND AT OTHER TIMES MAY DIFFER. INTERFACES BEWEEN STRKI'A ARE APPROXIMATE. TRANSITIONS BETWEEN STRATA MAY BE GRADUAL. U!•U�ilt)Elr)�f=p))♦�x1i+J!•ll:ll Project: Academic Instnlction Facility Boring No.: A-2 Drilled: May 2, 2008 Project #: 6468-08-2076 Page I o1. 1 AMA G D Ii P H al) 0 SOIL CLASSIHCA"IIOIV AND REMARKS . SEE KEY SYMBOLSFIFIM-OR EXPLINATIONOF" SYMBOLS AND AIWBREVIATIONS BELOW. i li N ' D L V (fti 15.7 '. SAMPLES In vi, 20 30 N, N N I ^ 50' 60 70 I.I. SO p.) H 'XI IIXI T �• fi N-coun"G' Kee AfltQU!b = =, c —4 'IS ail :1.-i1 - Mediwn dense m�ist.6rosnesillySAND (SAI) (Ix�csibk 010 SS-1 3-5-6 Lame m ,cry lone.\vCl. Anr: hro m to Ian. sihy llne,SAND (SSUSPI - SS.2 t-3.3 V: '.: :': .. 10.7... SS-3 i; i.3. _ 111 5,7 SS-5 X IQ-10-12. 111 IS — 6.7 SS-(, X41 15 SS-7 1-1.I 20 .4_i _(I Medium don., .0. liglu gray. sihy line SAND (SNU 'SS-R 12-II-Id Dense. aet. gray. line la Amcor SAND (SI'1 wish murilk 3o shells. cemented saml I. t SSA 15.16-Is 30 Boring leinninaal m ill fca 35 — -1').3 35 — — 40 -24.3 All -- — nt m a 11 111 rll .R, 40 X, hU M lilt W Hill DRILLER: Carolina Drilling EQUIPN117Nr: CMRAS, manual hairline, METHOD: M.'I'mry — 1101,13DIA.: 4" REMARKS G3 andwmcr at 3.5 feet based on sample a6sl:rvmian. Project: Academic Instnlction 1'acili(y ' Boring No.: A-3 Drilled: Projeo #: May 2, 2008 646S-08-M76 Page I or I THIS RECORD IS A REASONABLE INTERPRE F.4TION AfMACTECLOCATION, OFSUBS U OCTI NS ACE. CONDITIONS A' ES M EXPLORATION SUBSURFACE CONDITIONS ATOTNER MAYOXIMA INTERFA E'ANDEEOTHERTIMES IN"fEItFACF.S BIiWGGV STI2:\TAAIiE AI'I'KOXIMA9'fi. TRANSITIONS IIFTWHEN STRA'LA MAY BE GRADUAL. — __. —� P T H (fU 0 SOIL CLASSIFICATION AND REMARKS SEE KI7Y SYMBOL SHEEr FOR EXPLANATION OF SYMBOLS AND ABBREVIATIONS BELOW. L li G L' N D E L E V (fn 14.d. SAMPLES TL('m) 10 NM Lc(trl --t 100 I D N T T Y I' I. v-COUNT 'It R"c;JRQI)gr •e c `.a a � _ F; _ 4f 20 30 AHNES(%) O 40 SPT - 50 O (bpU 60 70 80 flf 90 'To soil SS-1 x 444 Stiff, very moist, light gray and brown, clayey SILT(MI,) SSQ x 4.5.5 -'Medium rlensc, wet, light gray, silly tine SAND (SIM) . Dose to very loose, wet, dark brown and black to brown, silty `fine SAND(SM) SS-4 2-3-. IU' 4'4 SS-5 2-I2 • l0 timing terminateda1 10 feet, Is — 20 .5.6 — — 20 25 -U16 25 — 7I1 -I S.h O 15 -20.6 35 — di In e DRILLER: Carolina Drilling EQUIPMENT: CME-45, manual hammer METHOD: Hal:ow stein auger HOLE: DIA.: 6" REMARKS: Groundwater at 5 feel upon. ... pletion of drilling. THIS RECORD IS REASONABLE INTERPRETATION OF SUBSURFACE CONDITIONS .AT THE EXPLORATION LOCATION. SUBSURFACE CONDITIONS ATOTHFR LOCATIONS AND ATOTFIrR TIMES MAY DIFFER. INTERFACES BEWEEN STRATA ARE APPROXIMATE. TRANSITIONS BETWEEN STRATA MAY BE GRADUAL. U 11) ZU .uJ 41J 11) (A) A) SU 91) IW -SOIL TES'C BORING RECORD Project: Academic Instruction Facility Boring No.: A-4 Drilled: May 2, 2008 'Project#: 6468-08-2076 Page I of I ArMA F P T It (B) SOIL CLASSIFICATION AND REMARKS SEE KEY SYMBOL SHEET FOR EXPLANATION OF SYMBOLS AND ABBREVIATIONS BELOW. L E G E N D F: 13 V (f0 bi.5' SAMPLES �PL�) 10 20. 70 ♦FINES O J0' NM SVF(bpf) 50 a) (%) 60 70 LL(17,) '80. 90 100 D N N I Y 1, 1. N-col N"r or 14m'&JRQU'7, , 'o , o •_. ,S ' 4o toil (Sd '- l dense; moist, dark brown to gray, clayey SAND (SC) SS-1 x 7-7-5 (1 - (lxusible till) .: • ' / Meehmu cliff to ml7: very ..miss, (an -gray, cla)ey SILT(ML) SS-2 X 5-5.6 SS l 1 2-3-5 5 C.. - .., .- -, Mediwndeaa, wet,gmy-Ian. tine sihy SAND(Shll `-"'" .. - . !SSA 'Loose. wet, dark brown; cl:ryry tine SAND (SC) with sill, IU 'LB SS 5 4-2-2. _ AAA III Itoring mnninartvl at 10 feet --- 15 .0.2 15 -- 20 •5.2 — 20 — 25 — -10.2. 2S _ _ .10 ,15 — -20.2 -15 — — d0 25.2 .117 ]IT 0 It, L11 pl ill )1) 61) ]II So W 100 ])KILLER: Ca,olina Drilling EQUIPMENT: CMG45. mennal hammer 1 METHOD: Hallow stem auger Project: Academic IBSIni.ctio 1 Facility HOLE DIA.: 6" REMARKS: Grnundwaua al 5 feel upon completion nr drilling. Boring No.: A-5 Drilled: May 2, 2008 'PHIS RECORD IS REASONABLE INTERPREPATION Project 4: 6468-08-2076 Page I or I OF SU13SUIZFACE CONDITIONS AT THE EXPLORATION AT OTHER LOCATION. SUNSAT LOCATIONS AND AT OTHER TIMES NL\Y DIETER. OTHER TIMES MAC INTERFACES BEWEEN STRATA ARE APPROXIMATE. ":�1�17d�1/ YY 1/�lAt,/ TRANSITIONS HETWEEN STRATA MAY BEGRADUAL. I $ .Aj MACTEC MACTEC ENGINEERING AND CONSULTING, INC. RALEIGH, NORTH CAROLINA LABORATORY TESTING SUMMARY SHEET PROJECT NAME: Academic Instruction Facility MACTEC PROJECT NUMBER: 6468-08-2076.01 DATE:5/15/08 SAMPLE IDENTIFICATION LIQUID & PLASTIC LIMITS' % FINER:'. 1200SIEVE NATURAL' MOISTURE; .- BORING SAMPLE'. NUMBER- DEPTH (feet) LL, PL _ PI A-1 S-3 3.5-5.0 45 17 28 28.8 17.1 A-1 S-5 8.5-10 54.7 59.3 A-1 S-6 13.5-15 3.2 A-1 S-7 18.5-20 0.9 A-1 S-8 23.5-25.0 5.2 A-2 S-4 6-7.5 9.8 A-2 S-5 8.5-10 4.4 A-2 S-6 13.5-15.0 2.0 A-3 S-7 18.5-20.0 2.4 A-5 S-3 3.5-5 21 20 1 48.9 Prepared by: Brian Johnson Laboratory Manager Reviewed by: nU•�✓�// 0 ACTEC — engineering and constructing a better tomorrow July II,200R TranSystenus Corporation Town Point Center 150 BOUsh Sh` Ct, Suite 1000 Norfolk, Virginia 23510 Attention: Mr. Jerry Q. Jorge, Associate/Assistant Vice President SWI,JECT: ADDENDUM 1 'PO REPOIYI' OF GF.ou,'CHNICAL EXPLORATION PROPOSED ACADEMIC INSTRUCTION FACILITY CAMP GEIGER, CAMP LEJEUNL, NOR,rti CAROLINA MACTEC PROJECT NO. 6468-08.2076 Dear Mr. Jorge: In our Report of Geotechnical Exploration date[[ Maiy 21, 2008, we characterized the loose sands at the site as being potentially liquefiable during the design earthquake event. Our analyses were based on 2002 data for the 0.2 second and I second spectral acceleration values (S, and Si, respectively) obtainer[ from the USGS web site. We concluded that Site Class F was applicable for the site and that mitigation of the potentially liquefiable soils or design of the structure to accommodate the effects of liquefaction was required. Mr. Kerry Nolhnagle of your office provided to its correspondence indicating that the Corps of Engineers may allow evaluation of liquefaction potential using 2008 preliminary spectral acceleration data published by the USGS. We were asked to reevaluate liquefaction potential using the 2008 data. 'rhe following is a comparison of the 2002 and 2008 spectral acceleration values from the USGS website and the resulting nutxinurn ground surface accelerations (a,,,,.,) computed from the data. Parameter 2t102 Data 2008 Data S, (Site Class 13) 0.204 g (1J67 Si (Site Class 11) 0.076„ 0.067 a,,,,„ 0.087 0.072 g Using the 2008 data, the loose sands between the water table and depths of 23.5 to 28.5 feet were found to be not liquefiable during the design earthquake event except for one zone of loose sand in boring A-3 between approximately 18.5 and 23.5 feet. Based on the results of these analyses, it is our opinion that soils at the site as it whole are not potentially liquefiable and Site Class F is not applicable. During the design earthquake event, the one zone of loose sand in boring A-3 may liquefy and reconsolidate following the earthquake; however, based on the depth of the zone, and its confinement by surrounding soils that do not liquefy, the potential for surface settlement as it result of the local zone is very low. On page 8 paragraph 4 of the May 21, 2008 report we presented recommendations for design of footings if the suticture is designed to accommodate liquefaction of it' earthquake drains were MACrEC Engineering and Consulting, Inc. 3301 Atlantic Avcnue • l6leigh, NC 27604 Phonc: 919.876.0410 • Pax: 919.931.8136 wwvcmactea.co ll TranSv'stems Curpor'trtiurr July Il, 2008 Page 2 of 2 Proposed Aeadetrrir: G+str'ucliun Facilift' Camp Geiger, Cimrp Lejemre. Notih Carotirla , -'A4AC EC ('inject No. 6468-08-2076" installed. These recommendations should be used for foundation design assuming the soils are not potentially liquefiable. Please contact us if you have any questions concerning this letter or out analyses. Respectfully submitted, MACTEC ENGINEERING AND CONSULTING, INC. CAT (; Po1..y Y�i James E. Veith, P.E. (Engineer of Record) Principal Geotechnical Engineer Registered, North Carolina 023232 J. Allan Tice, P.E. (Reviewer) Senior Principal Engineer Registered, North Carolina 6468 C23132 MACTEC REPORT OF SUBSURFACE AND GEOTECHNICAL ENGINEERING SERVICES Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No. FC07-189G May 10, 2007 Prepared For: Kroskin Design Group, P.C. Soliidopsalnc��;G 4 3 YW1 r,' k. tye M a TO: Kroskin Design Group, P.C. 6160 Kempsville Cr. Suite 316A Norfolk, VA 23502 Attn: Mr. Irwin Kroskin, P.E. May 10, 2007 RE: Report of Subsurface Investigation and Geotechnical Engineering Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G Dear Mr. Kroskin: In compliance with your instructions, we have completed our Geotechnical Engineering Services for the referenced project. The results of this study, together with our recommendations, are presented in this report. Often, because of design and construction details that occur on a project, questions arise concerning subsurface conditions. G E T Solutions, Inc. would be pleased to continue its role as Geotechnical Engineer during.the project implementation. We trust that the information contained herein meets your immediate need, and we would ask that you call this office with any questions that you may have. Respectfully Submitted, G E T Solutions, Inc. CARO Gerald W. Stalls S"r"., E.I.T. Senior Project Manager - SEAL - � 0141103 ; ..NGIN...... Camille A. Kattan, P.E. �< f A. Kid Principal Engineer NC Reg. N 14103 Copies: (4) Client 504 East Elizabeth Street, Suite 2 • Elizabeth City, NC 27909 • Phone (252) 335-9765 • Fax (252) 335-9766 info@getsolutionsine.com TABLE OF CONTENTS EXECUTIVESUMMARY............................................................................................ i 1.0 PROJECT INFORMATION...................................................................... 1 1.1 Project Authorization................................................................ 1 1.2 Project Description................................................................... 1 1.3 Purpose and Scope of Services .................................................. 2 2.0 FIELD AND LABORATORY PROCEDURES ........... -.................................. 3 2.1 Field Exploration..........................................I..................:........ 3 2.2 Laboratory Testing................................................................... 4 3.0 SITE AND SUBSURFACE CONDITIONS .............. ..................... I................ 5 3.1 Site Location and Description.................................................... 5 3.2 Subsurface Soil Conditions........................................................ 6 3.3 Groundwater Information.......................................................... 7 4.0 EVALUATION AND RECOMMENDATIONS .............................................. 7 4.1 Clearing and Grading................................................................ 7 4.2 Subgrade Preparation............................................................... 9 4.3 Structural Fill and Placement..................................................... 9 4.4 Building Foundation Design Recommendations ........................... 10. 4.5 Foundation Excavations ..................... ...................... I.............. 11 4.6 Building Foundation Settlements ......... ........................... I......... 11 4.7 Seismic Design Recommendations ........................................... 12 4.8 Building Floor Slabs................................................................ 12 4.10 Pavements............................................................................13 5.0 CONSTRUCTION CONSIDERATIONS-.................................................. 16 5.1 Drainage and Groundwater Concerns ..........................:.........I... 16 5.2 Excavations.......................................................................... 16 6.0 REPORT LIMITATIONS....................................................................... 17 APPENDIX I - BORING LOCATION PLAN APPENDIX 11 - LOG OF BORINGS APPENDIX HI - SOIL BORING PROFILE APPENDIX IV - CPT SOUNDINGS APPENDIX V - SUMMARY OF CBR TEST DATA APPENDIX VI - CLASSIFICATION SYSTEM FOR SOIL EXPLORAITON Solutions IncE�x��--' Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002: Academic Instructional Facility Camp Geiger, North Carolina GET Project No: EC07-189G EXECUTIVE SUMMARY The proposed construction at this site will consist of building a new two story structure, paved roadways and parking areas, as well as other site infrastructure. The project site is located within the northeast quadrant of the 7" Street and "C" Street intersection within the Camp Geiger military facility in North Carolina. A brief description of the anticipated characteristics of the new hotel is presented below: • Combination of Concrete masonry unit (CMU) walls and structural steel framing supported by shallow foundations. • The maximum anticipated wall and column loads were not anticipated to exceed about 3 Of and 150 kips, respectively. • Finish floor elevation of the structure anticipated to be located slightly above the existing . grade elevations. Accordingly, cut and/or fill operations are not expected to exceed 2-feet in order to establish the design grade elevations. • First floor to consist of slab -on -grade construction with distributed loads of about 150 pounds per square foot (psf). Our field exploration program included eleven (11) 10 to 50-foot deep SPT. borings and one (1) 100-foot deep CPT boring drilled within the proposed construction areas. A brief description of the subsurface soil conditions is noted below: Boring Locations — The surficial soils encountered at the boring locations were noted to consist of Topsoil, Crushed Stone (GP, GP -GM), and/or Uncontrolled fill, which extended to a depth ranging from about 4-inches to 4-feet below existing grades. These surficial soils were not,encountered at the location of borings B-3 or B-8. A deposit of SAND (SP-SM, FILL) ranging in thickness from about 12 to 15-inches was encountered at the locations of borings B-5 and B-7 at a depth ranging from the existing site grade elevations to 1 .5-feet. Beneath these surficial materials the subsurface soils encountered at the boring locations were consistent at the boring locations, to their explored depths, and were generally noted to consist of very loose to dense SAND (SP, SP-SM, SM, SM-SC, SC) with varying amounts of silt and clay. Additionally, a deposit of medium stiff to stiff Lean SILT (ML) were encountered with the lower granular soils at the location of borings B-1 and B-2 at a depth ranging from approximately 19 to 28-feet below existing grades. A brief description of the natural subsurface soil conditions encountered at the SPT boring locations is tabulated on the following page: Solu(toii"s*Inc = Report of Subsurface Investigation and Geotechnical Engineering Services Building P-002; Academic Instructional Facility Camp Geiger, North Carolina GET Project No: EC07-189G 5/10107 RANGES OF AVERAGE STRATUM SPT"'N- DEPTH (Feet) DESCRIPTION VALUES 0 to 0.5 STONE (GP, GP -GM); Borings B-1, B-3, B-5, and B-8 . TOPSOIL and/or Uncontrolled Fill; borings 13- 0 to 4 1, B-2, B-4 through B-7, and PB-1 through PB-3 4 to 50 1 SAND (SP, SP-SM, SM, SM-SC, SC) with W. O.H.121to 35 varyingamounts of silt and clay 19 to 28 IA Lean SILT (ML) with varying amounts of 5 to 14 sand Nnta 111 SPT = Standard Penetration Test. N-Values in Blows -per -foot Noted (2) W-O.H. = Weight of Hammer Groundwater was encountered at depths of approximately 5 to 6-feet below existing grades at the boring locations. The following evaluations and recommendations were developed based on our field exploration and laboratory -testing program: Field-testing program during construction to include compaction testing, sub -grade inspection, test pit excavations, and foundation excavation observations for bearing capacity verification. • A cut of approximately 4'to 6-inches, with isolated areas as deep as 24-inches, will be required to remove the TOPSOIL materials from within the construction areas. Additional recommendations for site clearing and grading are provided in section 4.1 of this report. • Shallow foundations designed using an allowable bearing capacity of 2,000 psf (24-inch embedment, 24-inch width). In preparation for shallow foundation support, the footing excavations should extend into firm natural soil or well compacted structural fill. Estimated total and differential settlements should, be up to about f- inch and about %z-inch, respectively. SalgdQi;Blnc` +. Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002; Academic Instructional Facility Camp Geiger, North Carolina GET Project No: EC07-189G CMU wall construction should be designed to contain construction ioints at on -center distances not exceeding 20-feet. These joints will provide for more flexible wall members that are less likely to crack as a result of settlement. The foundations should also be designed with the use of top and bottom reinforcing steel for added rigidity and to increase the foundation performance with respect to settlement. Proposed structure should be designed based on a site seismic classification of "D", as a result of the 100-foot deep CPT boring, our experience in the project area, and the requirements provided in provided in the North Carolina State Building Code (2003 International Building Code with North Carolina Amendments) section 1615.1; Table 1615.1.1 This summary briefly discusses some of the major topics mentioned in the attached report. This report should be read in its entirety to thoroughly evaluate the contents. Solupogs� Jnc;I,+"'rz�``>. Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 i Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G 1.0 PROJECT INFORMATION 1.1 Project Authorization: G E T Solutions, Inc. has completed our Geotechnical Engineering study for the proposed Building P-002; Academic Instruction Facility project. The Geotechnical Engineering Services were conducted in general accordance with G E T Solutions, Inc. Proposal No. PVB07-139G, dated January 18, 2007. Authorization to proceed with the services was received from Mr. Irwin Kroskin with Kroskin Design Group, PC in the form of an email, dated of April 6, 2007. 1.2 Project Description: The proposed development at this site is planned to consist of building a two-story structure, new paved roadways and parking lot, as well as other site infrastructure components. The building will have a total plan area of approximately 72,000 square feet with the first finish floor elevation anticipated to be located slightly above the existing site grade elevations. Accordingly, cut and/or fill operations are not expected to exceed about 2 feet in order to establish the design grade elevations. The new building is anticipated to be constructed of concrete masonry unit (CMU) walls and structural steel framing supported by shallow foundations. The maximum foundation design loads associated with the proposed structure were not known at the time of this reporting. However, based on our experience with similar structures, the maximum column and wall foundation loads are not expected to exceed about 150 kips and/or 3 kips per linear foot, respectively. The first floor is to be constructed as a slab -on -grade member with distributed loads of about 150 pounds per square foot (psf). If any of .the noted information is incorrect or has changed, please inform G E T Solutions, Inc. so that we may amend the recommendations presented in this report, if appropriate. Solutiowkflq; _. Report of Subsurface Investigation and Gootechnical Engineering Services 5/10/07 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G 1.3 Purpose and Scope of Services: The purpose of this study was to obtain information on the general subsurface conditions at the proposed project site. The subsurface conditions encountered were then evaluated with respect to the available project characteristics. In this regard, engineering assessments for the following items were formulated: 1. General assessment of the soils revealed by the borings performed at the proposed development. 2. General location and description of potentially deleterious material encountered in the borings that may interfere with construction progress or structure performance, including existing fills, surficial/subsurface organics, or expansive. soils. 3. Soil subgrade preparation, including stripping, grading, and compaction, as well as providing Engineering criteria for placement and compaction of approved structural fill material, including weather and equipment effects. 4. Construction considerations for fill placement, subgrade preparation, and foundation excavations. 5. Seismic site classification provided based on the results of one 0 ) 100- foot deep CPT borings, our experience in the project area, and the requirements provided in the North Carolina State Building Code (2003 International Building Code with North Carolina Amendments) section 1615.1; Table 1615.1.1. 6. Feasibility of utilizing a shallow foundation system for support of the proposed building. Design parameters required for the foundation systems, including foundation sizes, allowable bearing pressures, foundation levels, and expected total and differential settlements. 7. Typical pavement sections recommendations based on the results of three (3) Standard Penetration Test (SPT) borings performed to a depth of 10-feet as well as our experience with similar soil conditions. 7 Soluhons�:lnc$� F -„ Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-169G The scope of services did not include an environmental assessment for determining the presence or absence of wetlands or hazardous or toxic material in the soil, bedrock, surface water, groundwater or air, on or below or around this site. Any statements in this report or on the boring logs regarding odors, color, unusual or suspicious items or conditions are strictly for the information of the client. Prior to development of this site, an environmental assessment is advisable. 2.0 FIELD AND LABORATORY PROCEDURES 2.1 Field Exploration: In order to explore the general. subsurface soil types and to aid in developing associated foundation design parameters, eight (8) 30 to 50-foot deep Standard Penetration Test (SPT) borings (designated as B-1 through B-8) and three (3) 10-foot deep SPT borings (designated as PB-1 through PB-3) were drilled by G E T Solutions, Inc. within the proposed construction areas. The SPT borings were performed with. the use of a power drill rig using mud (rotary wash) drilling procedures. The soil samples were obtained with a Split -Spoon Sampler in general accordance with the Standard Penetration Test (SPT) method ASTM D 1586. These samples were taken at near continuous intervals from the ground surface to a depth of 10 feet and at 5-foot intervals thereafter to the boring termination depth. Additionally, a CBR bulk soil sample was collected from each of the 10-foot deep SPT borings noted above (PB-1 through P13-3)• These samples were returned to our Elizabeth City laboratory for natural moisture, full sieve, Atterberg Limits, Standard Proctor, and CBR analysis. The results of the CBR testing procedures are provided in Appendix IV. Also, one (1) 100-foot deep Cone Penetrometer (CPT) sounding (designated as CPT-1) was performed within the proposed building area to evaluate the site for seismic classification. As the cone was advanced into the ground, tip resistance, sleeve friction and dynamic pore water pressures were recorded approximately every five centimeters. During the site reconnaissance, shear wave velocity measurements were taken at the CPT sounding location at approximate 1-meter intervals to the termination depth of 100 feet. The CPT soundings were performed by ConeTec, Inc. The boring schedule noting the SPT and CPT boring depths and locations is presented in Table I on the following page. 3 Report of Subsurface Investigation and Geotechnical.Engineering Services 5/10/07 Building P-002 Academic Instruction Facility _ Camp Geiger, North Carolina GET Project No: EC07-189G Table I — Boring Schedule Bormg : Boring Bonng Location + ., Number g 4, ,Deptha B-1 30 Building P-002; Approx. Northwest Corner B-2 50 Building P-002; Approx. Northeast Corner B-3 30 Building P-002; Approx. Center of West Wall B-4 30 Building P-002; Approx. Center of East Wall B-5 50 Building P-002; Approx. Southwest Building Corner B-6 30 Building P-002; Approx. Southeast Building Corner B-7 30 Building P-002; Approx. Center of Building; Northern Third B-8 30 Building P-002; Approx. Center of Building; Southern Third CPT-1 100 Building P-002; Approx. Center of Building PB-1 10 Proposed Parking Lot; North Entrance Roadway PB-2 10 Proposed Parking Lot; Approx. Southernmost Drive Lane; Approx. Center PB-3 10 Proposed Parking Lot; Easternmost Drive Lane; North End The SPT and CPT boring locations were established and were identified in the field by G E T Solutions Inc. personnel by measuring from existing landmarks. The approximate boring locations are shown on the "Boring Location.Plan" attached to this report (Appendix I, Figure 1). This plan was developed based on the site plan provided to G E T Solutions, Inc. by Kroskin Design Group, PC. 2.2 Laboratory Testing: . Representative portions of all soil samples collected during drilling were sealed in glass jars, labeled, and transferred to our Elizabeth City laboratory for classification and analysis. The soil classification was performed by a Geotechnical Engineer in accordance with ASTM D2488. A total of five (5) representative split spoon soil samples were selected and subjected to natural moisture and 4200 sieve wash testing and analysis in order to corroborate the visual classification of the granular soils. These test results are tabulated on the following page and are also presented on the "Log of Boring" sheets (Appendix II)• 4 Soluhons;lncr�� Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 , Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G Table II - Laboratory Test Results 8orrng ;Sample Depth - Natu`ral #2U0, Classlflcatlon.'- No i No z Sieve �° s;;T ' r� ,(Ft) .'Moisture B-2 S-2 2-4 24.0% 32.8% SC B-4 S-3 4-6 17.4% 9.2% SP-SM B-6 S-4 6-8 19.9% 8.6% SP-SM B-8 S-5 8-10 19.0% 3.7% SP B-8 S-9 28-30 21.4% 30.3% SC The three (3) CBR bulk soil samples were subjected to Proctor, - #1200 sieve, Atterberg limits, and wet and dry CBR testing procedures. These results are presented in a tabular form in Appendix V included within this report, "Summary of CBR Test Data" 3.0 SITE AND SUBSURFACE CONDITIONS 3.1 Site Location and Description: The project site is located within the northeast quadrant of the 71h Street and "C" Street intersection within the Camp Geiger military facility in North Carolina. At the time of our field investigation services, the property was generally observed to consist of a combination of grass covered areas with isolated trees, an existing gravel parking lot, and an existing asphalt paved tennis court. The site appeared to be relatively level with less than 1-foot change in elevation in 50 feet. The northernmost site boundary consists of 6th Street followed by existing structures (G550 through G554). The westernmost consists of "C" Street followed by an existing parking lot and an existing structure (G61 5). The southernmost boundaries consist of 7'h Street followed by an existing structure (G710). The easternmost boundary consists of "E" Street followed by an existing structure (G640). MMM 56ttltiotj5<Inc-��,,+N,? Report of Subsurface Investigation and Geotechnical Engineering Services 5110/07 Building P•002; Academic Instructional Facility Camp Geiger, North Carolina GET Project No: EC07-189G RANGES OF AVERAGE SPT` N- STRATUM DESCRIPTION DEPTH (Feet) VALUES : '�JSri' i4 2 �l `'.r v'JT114.y 11"A,Ni� I �'•l. .' i £f 3S}v}'t4`��fi �k i ) r'� ,'. tBkl 8�and Borings through 'B ts- u- �I. _. „ ;' c �i E F - tom.--.T 4. • f� . STONE (GP, GP -GM); Borings B-1, B-3, B-5, 0 to 0.5 and B-8 TOPSOIL and/or Uncontrolled Fill; borings 13- 0 to 4 1, B-2, B-4 through B-7, and P13-1 through PB-3 SAND (Sp, Sp-SM, SM, SM-SC, SC) with W O.H.121 to 35 4 to 50 l varyin amounts of silt and clay Lean SILT (ML) with varying amounts of 5 to 14 19 to 28 IA sand Note (1) SPT = Stanaaro reneuauun reo£, .au�� ��••� r'- --- Noted (2) W.O.H. = Weight of Hammer • Groundwater was encountered at depths of approximately 5 to 6-feet below existing grades at the boring locations. The following evaluations and recommendations were developed based on our field exploration and laboratory -testing program: Field-testing program during construction to include compaction testing, sub -grade inspection, and foundation excavation observations for bearing capacity verification. • A cut of approximately 4 to 6-inches, with isolated areas as deep as 24-inches, will. be required to remove the TO materials from within the construction areas. Additional recommendations for site clearing and grading are provided in section 4.1 of this report. • Shallow foundations designed using an allowable bearing capacity of 2,000 psf (24-inch embedment, 24-inch width). In preparation .for shallow foundation support, the footing excavations should extend into firm natural soil or well compacted structural fill. Estimated total and differential settlements should be up to. about 1- inch and about 'h-inch, respectively. Sclutlm s Inc W'. Report of Subsurface Investigation and Geotechnical Engineering Services 5/10107 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G The subsurface description is of a generalized nature provided to highlight the major soil strata encountered. The records of the subsurface exploration included in Appendix II (Log of Boring sheets) and the Generalized Soil Profile presented in Appendix III should be reviewed for specific information as to individual borings. The stratifications shown.on the records of the subsurface exploration represent the conditions only at the actual boring locations. Variations may occur and should be expected between boring locations. The stratifications represent the approximate boundary between subsurface materials and the transition may be gradual. 3.3 Groundwater Information: The groundwater depth was measured at each boring location during drilling operations and was found to occur at depths ranging from approximately 5 to 6 feet below the existing site grades. Groundwater conditions will vary with environmental variations and seasonal conditions, such as the frequency and magnitude of rainfall patterns, as well as man- made influences, such as existing swales, drainage ponds, underdrains, and areas of covered soil (paved parking lots, side walks, etc.). It is estimated normal seasonal high groundwater level will fluctuate within 1 to 1.5 feet above the current levels. We recommend that the contractor determine the actual groundwater levels at the time of the construction to determine groundwater impact on this project, if needed. 4.0 EVALUATION AND RECOMMENDATIONS 4.1 Clearing and Grading: The proposed construction areas should be cleared by means of removing the existing tennis court as well as their associated utilities, if present, vegetation, trees, associated root mat, and Topsoil. It is expected that an approximate.24-inch cut will be required to remove the majority of the Topsoil. It may be possible to reduce the extent of the 24-inch cut by having an inspector o9n-site during the grading operations to more accurately delineate the cut depth. This cut is expected to be deeper in isolated areas to remove deeper deposits of organic soils, which may become evident during. the clearing. Report of Subsurface Investigation and Geotechnical Engineering Services 5110/07 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G The subsurface soils recovered at the boring locations typically contained appreciable amounts of fines (SAND; SM-SC, SC). Also, based on the laboratory testing, the current (natural). moisture contents of the surface soils at the explored locations were near their respective optimum moisture. Accordingly, combinations of excess surface moisture from precipitation ponding on the site and the construction traffic, including heavy compaction equipment, may create pumping and general deterioration of the bearing capabilities of the surface soils. Therefore, undercutting to remove very soft soils should be anticipated. The extent of the undercut will be determined in the field during construction, based on the outcome of the field testing procedures (subgrade proofroll). Furthermore, inherently wet subgrade soils combined with potential poor site drainage make this site particularly susceptible to subgrade deterioration. Thus, grading should be performed during a dry season if at all possible. This should minimize these potential problems, although they may not be eliminated. Control of surface water is very important to the successful completion of the proposed construction. The contractor should plan his grading activities to control surface water and minimize erosion of exposed cut or fill material. This may include constructing temporary berms, ditches, flumes and/or slope drains to intercept runoff and discharge it in a controlled fashion, while complying with state and local regulations. The project's budget should include an allowance for subgrade improvements (undercut and backfill with select fill). It is recommended that the clearing operations extend laterally at least 5 feet beyond the perimeter of the proposed building area. is Solutions Idc KS %.F' Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G. 4.2 Subgrade Preparation: Following the clearing operation and prior to site grading or any fill placement, the subgrade soils should be evaluated by G E T Solutions, Inc. for stability. Accordingly, the subgrade soils should be proofrolled to check for pockets of soft material hidden beneath a crust of better soil. Several passes should be made by a large rubber -tired roller or loaded dump truck over the construction areas (where possible), with the successive passes aligned perpendicularly. The number of passes will be determined in the field by the Geotechnical Engineer depending on the soils conditions. Any pumping and unstable areas observed during proofrolling (beyond the initial cut) should be undercut and/or stabilized at the directions of the Geotechnical Engineer. Following the proofroll and approval by the engineer, it is recommended that, within the construction areas, natural soils below stripped grade should be compacted to a dry density of at least 98 percent of the Modified Proctor maximum dry density (ASTM D1557), as tested,to a depth of 12-inches, where possible. This densification will require the use of a large vibratory roller. . 4.3 Structural Fill and Placement: Following the proper compaction and approval of the natural subgrade soils by the Geotechnical Engineer, the placement of the fill required to establish the design grades may begin. Any material to be used for backfill or structural fill should be evaluated and tested by G E T Solutions, Inc. prior to placement to determine if they are suitable for the intended use. Suitable structural fill material should consist of sand or gravel containing less than 20 percent by weight of fines (SP, SM, SW, GP, GW), having a liquid limit less than 20 and plastic limit less than 6, and should be free of rubble, organics, clay, debris and other unsuitable material. 0 Solutipi5 Inc ,� �` Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G All structural fill should be compacted to a dry density of at least 98 percent of the Modified Proctor maximum dry density (ASTM D1557). In general, the compaction should be accomplished by placing the fill in maximum 10-inch loose lifts and mechanically compacting each lift to at least the specified minimum dry density. A representative of G E T Solutions, Inc. should perform field density tests on each lift as necessary to assure that adequate compaction is achieved. Backfill material in utility trenches within the construction areas should consist of structural fill (as described above), and should be compacted to at least 98 percent of ASTM D1557. This fill should be placed in 4 to 6 inch loose lifts when hand compaction equipment is used. 4.4 Building Foundation Design Recommendations: Provided that the previously recommended earthwork construction procedures are properly performed, the proposed building can be supported by shallow spread footings bearing over firm natural soil or well -compacted structural fill material (all uncontrolled fill should be removed from beneath the foundation areas). The footings can be designed using a net allowable soil pressure of up to 2000 pounds per square foot (psf). In using net pressures, the weight of the footings and backfill over the footings, including the weight of the floor slab, need not be considered. Hence, only loads applied at or above the finished floor need to be used for dimensioning the footings. Shallow bearing improvements in the form of undercut and backfill with the use of No. 57 stone is anticipated to be required to replace unsuitable soils. Additional information regarding the foundation bearing improvements are provided in Section 4.5 of this report. In order to develop the recommended bearing capacity, the base of the footings should have an embedment of at least 24 inches beneath finished grades, and wall footings should have a minimum width of 24 inches. In addition, isolated square pier footings, if used, are recommended to be a minimum of 3 feet by 3 feet in area for bearing capacity consideration. The recommended 24-inch footing embedment is considered sufficient to provide adequate cover against frost penetration to the bearing soils. 10 Report of Subsurface Investigation and Gcotechnical Engineering Services 5/10/07 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G 4.5 Foundation Excavations: Immediately prior to reinforcing steel placement, it is suggested that the bearing surfaces of all footing and floor slab areas be compacted using hand operated mechanical tampers, to a dry density of at least 98% of the Modified Proctor maximum dry density (ASTM D 1557) as tested to a depth of 12 inches, for bearing . capacity considerations. In this manner, any localized areas, which have been loosened by excavation operations, should be adequately re -compacted. The compaction testing in the base of the footings may be waived by the Geotechnical Engineer, where firm bearing soils are observed during the footing inspections. In addition to compaction testing, hand auger borings with Dynamic Cone Penetrometer (DCP) testing should be performed within the base of the foundation excavations to ensure that the footing bearing soils are suitable for foundation support. Foundation bearing soil improvements are expected to be required to penetrate the Uncontrolled Fill materials and potentially very loose granular soils. Following the removal of any unsuitable soils, the resulting excavation should be backfilled with compacted #57 stone or suitable structural fill. Recommendations for bearing improvements (undercut and backfill) should be provided in the field during construction by a representative of G E T Solutions, Inc. Soils exposed in the bases of all satisfactory and remedied foundation excavations should be protected against any detrimental change in condition such as from physical disturbance, rain or frost. Surface run-off water should be drained away from the excavations and not be allowed to pond. If possible, all footing concrete should be placed the same day the excavation is made. If this is not possible, the footing excavations should be adequately protected. 4.6 Building Foundation Settlements: It is estimated that, with proper site preparation (as previously presented), the maximum resulting total settlement of the proposed building foundations should be up to 1-inch. The maximum differential settlement magnitude is expected to'be about %- inch between adjacent footings (wall footings and column footings of widely varying loading conditions). The settlements were estimated on the basis of the results of the field penetration tests. Careful field control will contribute substantially towards minimizing the settlements. 11 Spludons Inc `E:m Report of Subsurface Investigation and Geotechnical Engineering Services 5/10107 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET. Project No: EC07-189G 4.7 Seismic Design Recommendations: The results of the completed field exploration program (CPT soundings) indicate that the average shear wave velocity recorded in the upper 100 feet was about 1 145 feet per second at the location of CPT-1. Additionally, the subsurface cohesive soil deposits encountered at the boring locations were noted to be less than 10-feet in thickness and contained un-drained shear strengths greater than 500 pounds per square foot, as indicated by the CPT soundings. As such based on the soil shear wave velocity test results, it is our professional opinion that the project site is within a site class 'Y in accordance with Table 1615.1.1 of the 2003 International Building Code. The results of the CPT testing are presented in the attached "CPT Soundings; CPT-1 ". 4.8 Building Flooi Slabs: The floor slabs may be constructed as slab -on -grade members provided the previously recommended earthwork activities and evaluations are carried out properly. It is recommended that all ground floor slabs be directly supported by at least a 4-inch layer of relatively clean, compacted, poorly graded sand (SP) or gravel (GP) with less than 5 percent passing the No. 200 Sieve (0.074 mm). The purpose of the 4-inch layer is to act as a capillary barrier and equalize moisture conditions beneath the slab. It is recommended that all ground floor slabs be "floating" if no turn down slab/foundation system is implemented. That is, generally ground supported and not rigidly connected to walls or foundations. This is to minimize the possibility of cracking and displacement of the floor slabs because of differential movements between the slab and the foundation. It is also recommended that the floor slab bearing soils be covered by a vapor barrier or retarder in order to minimize the potential for floor dampness, which can affect the performance of glued tile and carpet. Generally, use a vapor retarder for minimal vapor resistance protection below the slab on grade. When floor finishes, site conditions or other considerations require greater vapor resistance protection, consideration should be given to using a vapor barrier. Selection of a vapor retarder or barrier should be made by the Architect based on project requirements. 12 Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 ® Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G - 4.9 Pavements: The California Bearing Ratio (CBR) test results indicated a soaked CBR value ranging from 12.7 to 14.8, having an average of 13.8. The average soaked CBR value was multiplied by a factor of two-thirds to determine a pavement design CBR value. The two-thirds factor provides the necessary safety margins to compensate for some non - uniformity of the soil. The two-thirds factor provides the necessary safety margins to compensate for some non -uniformity of the soil. Therefore, a CBR value of 9.2 was used in designing the final pavement sections. A summary of the CBR test results and the moisture density relationship curves (Proctors) is provided in Appendix IV. Based on our experience with similar soil conditions the following typical minimum pavement sections are used. 1. Light Duty Pavement — Parking Areas: Flexible Pavement SUBGRADE: Stable and approved by the Geotechnical Engineer and compacted to at least 100% of ASTM D 698. AGGREGATE BASE: Minimum 8.0 inches of Aggregate Base Material, size NCDOT Type "A". ASPHALT SURFACE: Minimum 2.0 inches of Asphalt Concrete, NCDOT Type SF9.5A or SF9.5B. Rigid Pavement SUBGRADE: Stable and approved by the Geotechnical Engineer and compacted to at least 100% of ASTM D 698. AGGREGATE BASE: Minimum 6.0 inches of aggregate base material size NCDOT Type "A". CONCRETE: Minimum 6.0 inches of 4,000 psi.28 day strength and air entrained Portland cement concrete. 13 NO Solutf Inc Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G II. Heavy Duty Pavement - Roadway Areas: Flexible Pavement SUBGRADE: Stable and approved by the Geotechnical Engineer and compacted to at least 100% of ASTM D 698. AGGREGATE BASE: Minimum 8.0 inches of Aggregate Base Material, size NCDOT Type "A". ASPHALT BASE: Minimum 3.0 inches of Asphalt Concrete, NCDOT Type 1-19.013. ASPHALT SURFACE: Minimum 2.0 inches of Asphalt Concrete, NCDOT Type SF9.5A or SF9.5B. Rigid Pavement SUBGRADE: Stable and approved by the Geotechnical Engineer and compacted to at least 100% of ASTM D 698. AGGREGATE BASE: Minimum 6.0 inches of aggregate base material, size NCDOT Type "A". CONCRETE: Minimum 8.0 inches of 4,000 psi 28 day strength and air entrained Portland cement concrete. Actual pavement section thickness should be provided by the design.civil engineer based on traffic loads, volume, and the owners design life requirements. The above sections correspond to thickness representative of typical local construction practices and as such periodic maintenance should be anticipated. All pavement material and construction procedures should conform to North Carolina Department of Transportation (NCDOT) requirements. 14 Soluhon.SPlnc. - ,a :. Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 ® Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G In preparation for a stable subgrade support for the pavement section, the following construction steps are recommended: 1 . Following pavement rough grading operations, the exposed subgrade should be observed under proofrolling. This proofrolling should be accomplished with a fully loaded dump truck or 7 to 10 ton drum roller to check for pockets of soft material hidden beneath a thin crust of better soil. Any unsuitable materials thus exposed should be removed and replaced with a well -compacted material. The inspection of these phases should be performed by the Geotechnical. Engineer or his representative. 2. If excessively unstable subgrade soils are observed during proofrolling and/or fill placement, it is expected that these weak areas can be stabilized by means of thickening the base course layer to 10 to 12 inches and/or the use of a Geotextile Geofabric (such as Mirafi 500x or equivilant) or Geotextile Geogrid (such as Tensar BX1100 or equivalent). These alternates are to be addressed by the Geotechnical Engineer during construction, if necessary, who will recommend the most economical approach at the time. Actual pavement section thickness should be provided by the design civil engineer based on traffic loads, volume, and the owners design life requirements. The previous sections represent minimum thickness representative of typical local construction practices and as such periodic maintenance should be anticipated. All pavement material and construction procedures should conform to North Carolina Department of Transportation (NCDOT) requirements. 15 �olutlQns'Incn'�;4 Report of Subsurface Investigation and Geotechnical Engineering Services 5/10/07 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G 5.0 CONSTRUCTION CONSIDERATIONS 5.1 Drainage and Groundwater Concerns: Groundwater is expected to interfere with excavations that extend below a depth ranging from approximately 5 to 6 feet below existing grades. Dewatering at depths between 5 to 6 feet can most likely be accomplished by pumping from sumps. However, dewatering below the water level may require well pointing. It is recommended that the contractor determine the actual groundwater levels at the time of the construction to determine groundwater impact throughout the project site and at specific proposed excavation locations. 5.2 Excavations: In Federal Register, Volume 54, No. 209 (October, 1989), the United States Department of Labor, Occupational Safety and Health Administration (OSHA) amended its "Construction Standards for Excavations, 29 CFR, part 1926, Subpart P". This document was issued to better insure the safety of workmen entering trenches or excavations. It is mandated by this federal regulation that all excavations, whether they be utility trenches, basement excavation or footing excavations, be constructed in accordance with the new (OSHA) guidelines. It is our understanding that these regulations are being strictly enforced and if they are not closely followed, the owner and the contractor could be liable for substantial penalties. The contractor is solely responsible for designing and constructing stable, temporary excavations and should shore, slope, or bench the sides of the excavations as required to maintain stability of both the excavation sides and bottom. The contractor's responsible person, as defined in 29 CFR Part 1926, should evaluate the soil exposed in the excavations as part of the, contractor's safety procedures. In no case should slope height, slope inclination, or excavation depth, including utility trench excavation depth, exceed those specified in local, state, and federal safety regulations. We are providing this information solely as a service to our client. G E T Solutions, Inc. is not assuming responsibility for construction site safety or the contractor's activities; such responsibility is not being implied and should not be inferred. 16 Solutiorj.SE'Inc��, Wit" Report of Subsurface Investigation and Geotechnical Engineering Services 5/10107 Building P-002 Academic Instruction Facility Camp Geiger, North Carolina GET Project No: EC07-189G 6.0 REPORT LIMITATIONS The recommendations submitted are based on the available soil information obtained by G E T Solutions, Inc. and the information supplied by the client for the proposed project. If there are any revisions to the.plans for this project or if deviations from the subsurface conditions noted in this report are encountered during construction; G E T Solutions, Inc. should be notified immediately to determine if changes in the foundation recommendations are required. If G ET Solutions, Inc. is not retained to perform these functions, G E T Solutions, Inc. can not be responsible for the impact of those conditions on the geotechnical recommendations for the project. The Geotechnical Engineer warrants that the findings, recommendations, specifications or professional advice contained herein have been made in accordance with generally accepted professional geotechnical engineering practices in the local area. No other warranties are implied or expressed. After the plans and specifications are more complete the Geotechnical Engineer should be provided the opportunity to.review the final design plans and specifications to assure our engineering recommendations have been properly incorporated into the design documents, in order that the earthwork and foundation recommendations may be properly interpreted and implemented. At that time, it may be necessary to submit supplementary recommendations. This report has been prepared for the exclusive use of Kroskin Design Group, PC as well as their consultants for the specific application to the Proposed Building P-002; Academic Instruction Facility project located within the Camp Geiger military facility in North Carolina. 17 solugons Inc APPENDICES BORING LOCATION PLAN II. LOG OF BORINGS III. GENERALIZED SOIL PROFILE IV. SUMMARY OF CBR TEST DATA V. CPT SOUNDINGS VI. CLASSIFICATION SYSTEM FOR SOIL EXPLORATION 6TH STREET B-1 B-2 B�-@,8 �V B-3 B-4 CPT-1 . B-7 B-S B-6 LEGEND —APPROXIMATE BORING LOCATIONS PB-1 I r� I I I I I I I I I i I I I I I i I I I I I I I PB-3 I LJ L---J I I I I I I I I I I I I I I I I I I I I I I I I I I I �J I L_--J a GET Project Nonei BUILDING P-0021 ACADEMIC INSTRUCTIONAL FACILit YI CAMP GEIGER, NC Project No., EC07-189G Oroen Hy� GVS c.,,a.�.r�.,._..+...� Oatei 5/10/07 Flgure No! I BORING LOCATION PLAN SCALE not to scale GET. LOG OF BORING No. B-1 PROJECT: Academic Instruction Facility: Building P-002 PROJECT NO.: EC07.189G CLIENT: Kroskin Design Group PROJECT LOCATION: Camp Geiger. North Carolina LOCATION: See Attached Boring Location Plan ELEVATION: MA DRILLER: W.Riddick LOGGED BY: G. Stalls, E.I.T. DRILLINGMETHOD: Mud Rotarv(wash) DATE: 4-19-07 DEPTH TO - WATER> INITIAL: 8 6-feet AFTER 24 HOURS: -II- CAVING> jL L ^ w m o Description 0 y E Z in o m 10 o a " 0 TEST RESULTS Plastic Limit Liquid Limit Water Content - o Penetration - 10 20 30 40 50 60 70 0 t ..z 2 2 s 3 z z 5 s a 4 3 3 2 10 ]a 12 6-inches Crushed Stone (GP -GM) Rfm JJJ JJJ JJJ ..... ........... ..... .. ................ _ ....... ...... .. ..... :.....:.... :_. _.:,.... :. _..:.....:... :.....:. .: .......................:................... :.....,_....c.....:.. _.:..._:.....:.... ..: ... ..:.....:.... ..:.. ...: .. ..:.....:_.... .... .... _..:.....:.....:..... j. 18-inches TOPSOIL Tan -Gray, moist, Silty Clayey SAND (SM- SC) with organics (Uncontrolled Pill) 2 5 Gray, moist, Silty fine SAND (SM), very loose 3 Tan -Gray, wet, poorly graded fine to medium SAND (SP-SM) with silt to poorly graded fine to medium SAND (SP), loose Light Tan&om 8-feet Light Gray from l 8-feet .I .I. r t 1..I: t r -�'a:ri. i.i:tr !i li 7:1: t ! 1 1 �P11 i rr d:Gti r7a': S:I:r L. 4 to as 7 20 t Light Gray, wet, Lcan SILT (ML) with sand, medium stiff 23 Light Gray, wet, Silty fine SAND (SM) with marine shell fragments and trace stone (Cemented Sand), medium dense to dense — 8 zs 30 Boring terminated at 30 ft. 35 Figure PAGE 1 of 1 ET PROJECT: Academic Instruction Facility: Building P-002 PROJECT NO: EC07-189G CLIENT: Kroskin Design Group -- PROJECT LOCATION: Camp Geiger, North Carolina ,,,,,,,,•�,,,,,,�,,; LOCATION: See Attached Borina Location Plan ELEVATION: INA �,•,,,,,,,,,,,,,�. ,. DRILLER: W. Riddick LOGGED BY: G. Stalls. E.I.T. LOG OF BORING . DATE: 4-18-07 DRILLING METHOD: Mud Rwary(wash) No. B-2 DEPTH TO - WATER> INITIAL: $ 5-feet AFTER 24 HOURS: s CAVING> L u W N Qo TEST RESULTS Plastic Limit Liquid Limit a= DBSCfiptlOfl n E ci Z o u 00 in m U Water Content - O Penetration - 10 20 30 4 0 50 60 70 0 _ 3-inches TOPSOIL a - 1 p 3 3 2. ......__..... .......... ...... ......_.._ o - �.....:........... .2 Mottled Dark Gray -Reddish Tan, moist, Silty £me SAND (SM) with clay and organics (Uncontrolled Fill) .... ..... ' ' ..... ' ' ' 2 z 2 ...:.....: ....:.....:..... Gray, moist, Clayey £me SAND (SC), very loose 5 Wet from 5-feet . .... 3 WOH woti woti < 4 .:.....: ...:..... .. _:.....:.... Tan -Gray, wet, poorly graded fine to medium SAND (SP-SM) with silt to poorly graded time to medium SAND (SP), very loose to loose :i [If i ...... .4i CJ. 1 •ia:iil .... .. 5 2 5 ............ ...... .......... ... .... .. .... 10 1 ;I;Cl d :GCI a'.r t r h i• 1 1'I 3 6 15 I:I 11 .1:I;r f .. ....... ....... .................... ... ... Light Gray from 18-feet! as tr ........... ............................ 23 ' .. 24 .........:.....:......:..... :.....:.....:..... - Light Gray, wet, Lean SILT (ML) with sand, stiff 8 28 . : [ s +o Silty fine SAND (SM) marine shell fragments Light Gray, wet, with and trace stone (Cemented Sand), medium dense to dense - i 9 ii 14 ...:......:.....:.....:... ..:.....:.....:.....:..... 30 10 1435 6 ......:......:.....:.....:..... W.O. FL = Weight Of Hammer Figure PAGE 1 of 2 GET PROJECT: Academic Instmction Facility: Building P-002 PROJECT NO.: EC07-189G CLIENT: Kroskin Design Group mmmmmowmmm PROJECT LOCATION: Camp Geiger North Carolina LOCATION: See Attached Boring Localion Plan ELEVATION: INA LOG OF BORING DRILLER: W.Riddick . LOGGED BY: G. Stalls. E.I.T. DRILLING METHOD: Mud Rotary (wash) DATE: 4-19-07 No. B-2 DEPTH TO - WATER> INITIAL: 4 5-feel AFTER 24 HOURS: CAVING> C u m c, TEST RESULTS TIE Description _m o Plastic Limit Liquid Limit 2 wz m w Water Content- o _. Penetration - 6 a ..... ....:... ..;.....; .. ;..... it Light Gray, wet, Silty fine SAND (SM) with trace fine stone and `. `:: : a : _ marine shell fragments, loose - .. 12 5 48 Dark Gray, wet, Silty fine SAND (SM) with trace clay, loose : '- ........................ ..... ........... 13 " 6 .... ... ........ .. .. .......... .. ..... Boring terminated at 50 ft. W.O.H. = Weight Of//ammer Figure PAGE 2 of 2 ETPROJECT: Academic I tstmci on l'ncility: Building P-002 PROJECT NO.: EC07-189G CLIENT: Kroskin Desipm Group PROJECT LOCATION: Camp Gci7er. North Carolina MEMIMMOMMEM "a,, LOCATION: See Attached boring Location flan ELEVATION: INA' ,,.,•,y.�.,,,,,•,,.,,,,,.. LOG OF BORING DRILLER: W. Riddick LOGGED BY: G. Stalls E.I.T. DRILLINGMETHOD: M dRotary(wash) DATE: 4-I8-07 No. B-3 DEPTH TO - WATER> INITIAL: S 6-feet AFTER 24 HOURS: 3 CAVING> L o oa TEST RESULTS = = a w ¢ d w o u Plastic Limit Liquid Limit v d Description " Ez m o v Water Content- 0 9 N U e Penetration - 10 20 30 40 50 60 70 0 a 6-inches Stone (GP) :c:: • • a:[tr ':'�,. 1 5 Tan, moist, poorly graded fine to medium SAND (SP-SM) with trace' silt, loose._.,., 3 ... ..... ...... 2 5 ................ .. ... .. ... Tan, moist, Clayey fine SAND (SC) with silt, loose to very loose ° 3 3 2 2 4 'fan -Gray, wet, poorly graded fine to medium SAND (Sf-SM) with i. j? r ;, silt to poorly graded fine to medium SAND (SP), loose to medium 1'cc r 4 s ° e dens :4 F I 4 ........................... ............ 'a:6i Li .. .. 5 s 7 10 L:rn. ...._.,,__............................ Dark Gray Gom 13-feet 't''J: r 1 6 -i 1 1 :I ;L'r1 3 5 4 :.....:.....:..... :.....:.... .:..... :... r5 4:i1 :..... :..... i-1;F11 :.... .:...........:........... Light Gray, wet, Silty fine SAND (SM), loose 7 20 -23 ..... - 19 Light Gray, wet, Silty fine SAND (SM) with marine shell fragments and trace stone (Cemented Sand), medium dense 6 9 .................................. 2s 2 Light Gray, wel, Silty fine SAND (SM) with trace clay, medium 30 dense ..... 91 is .................................................. Boring terminated at 30 ft. W.O.H. = Weight OJHantiner Figure PAGE 1 of 1 ETPROJECT: Academic Instruction Facility. Building P-002 PROJECT NO.: EC07-189G CLIENT: Kroski D sign Group PROJECT LOCATION: Camp Geiger. North Carolina LOCATION: See Attached Boring Location Plan ELEVATION: INA LOG OF BORING DRILLER: W. Riddick LOGGED BY: G. Stalls, E.I.T. DRILLING METHOD: Mud Rotary (,'ash) DATE: 4-19-07 No, B-4 DEPTH TO - WATER> INITIAL: V 6-feet AFTER 24 HOURS: S CAVING> S TEST RESULTS 5 ^ Description t n w n mZ N 3 oo ^� u Plastic Limit Liquid Limll 4 7 n is o U Water Content- O 0 Penetration - 10 20 30 40 50 60 70 e 2 2 3 4-inches TOPSOIL "' i i ` 1 Silty fine SAND with clay, loose Tan, moist, (SM) mixed 5 - Gray, moist, poorly graded fine to coarse SAND (SP-SM) with silt [ it :4 r 2 poorly graded fine to coarse SAND (SP), loose to medium dense ria,�: i:r. r [ 1 6 ... _: ....:_ ...:.....:.....:.....:..... 5la; tJ. 9 Wet from 6-feet .I:Cr r 3 �� 9.2 Reddish Tan from 6-feet r.r.t+: iarC' 4 r ° :.....:.._ .:......:.....:.....:.....:_.,. "trace clay from 6[o 8-feet '[l,'[i. Light Gray from 8-feet .1:1 c r + .. ... ..._ ... ....... . ... .. .. ....... . 5 2 5 to -I:I:I: i .:... ..: ... ..:... ..:......:.....:.....:..... :I: t 1 J_ :.. Reddish Tan from 13-feet .:.....:.... ..: .. ..:... ..:. .. 6 3 e - lJ f], 2 _...... ... ... I, 1 1, 4:Ctr [20 18 ..... Light Gray, wet, poorly graded fine to medium SAND (SP-SM) to Silty fine SAND (SM), medium dense a-23 i 7 Light Gray, wet, Silty fine SAND (SM) with marine shell fragments and trace stone (Cemented Sand), medium dense ? ? ? r 1; 6 25 :---- . Light Gray, wet, Silty fine SAND (SM) with trace clay and marine shell fragments, medium dense ` s 9 30 i Boring terminated at 30 ft. 35 W.O.H. = Weight Of Hammer Figure PAGE 1 of 1 ETPROJECT: Academic Instruction Facility Bnildin; P-002 PROJECT NO.: EC07-189G CLIENT: Kroskin[JesipiGroue PROJECT LOCATION: Camp Geiger North Carolina ,,,,,,,,,,,,,, �,,,�,,; LOCATION: See Attached Boring Location Plan ELEVATION: MA ,,,,, ..a,,,.,, •,"• DRILLER: W. Riddick LOGGED BY: G. Stalls, E.I.T. LOG OF BORING DATE: 4.18-07 DRILLING METHOD: Mud Rotary (wash) No. B-rj DEPTH TO - WATER> INITIAL: 6-feet AFTER 24 HOURS: v CAVING> G op TEST RESULTS m Plastic Limit , Liquid Limit O Description 'n° E Z 0 m o Water Content - o U m o Penetration - 10 20 30 40 50 60 70 0 e (GP -GM) 6-inches CruM �'Tan, moist, poorly grad finum SAND (SP-SM) withsilt (FILLdense a 4 �'. 2 a 's [i'r�.atY .I:I.ri 3 Tagmoist,Sil CD SM-SC,loose ( ) 5Mottled Reddish Tan-Grayoorly graded fine to coarse `?-G SP silt, loose t' 4 r :.....SAND Light Gray, wet, poorly graded fine to coarse SAND( ) to poorly.} graded fine to coarse SAND (Sp-SM) with silt, loose to medimn y;i; r [ 5 s ...:.....:_. :.. ..:....:....:.. ". 10 dense ... 't3:r7. r ..... _..... _..__.................... Fine to medium SAND from 8-feet .I X [ i I phl Dark Gray from 13-feet L'j: r J . u :. .I i I 1 ...-.. 1 6 4 d :......... ..: .. .. :. ....:..... .. .... . 15 rir1. :.. ..... Light Gray, wet, Silty fine SAND (SM), medium dense ' ' 4 7 20 ::::: s :• :' 4. ..... ::::: :::: 12 '.. _.:. _..L....:..... fine SAND shell fragments Light Gray, wet, Silty (SM) with marine and trace stone (Cemented Sand), medium dense to dense " - ' ' ' ::::: to to +r " :. :.....:.....:.. _. zs 9 t4 ...:.... _.... to t5 - - 1D it WO.H. = Weight Of Hammer Figure 'PAGE 41 of 2 Academic Instruction Facility: Building P-002 PROJECT NO.: EC07-189G CLIENT: Kroskin Desiys Group PROJECT LOCATION: Camp Geiger. North Carolina 6,,,,,,,„�.,„,,,„„w,�,.„„�; LOCATION: See Attached Boring Location Plan ELEVATION: INA DRILLER: W. Riddick LOGGED BY: G. Stalls, E.I.T. LOG OF BORING DRILLING METHOD: Mud Rotary (wash) DATE: 4-18-07 NO. B-S DEPTH TO - WATER> INITIAL:- $ 6-feet AFTER 24 HOURS: Z CAVING> L. u o TEST RESULTS Description o E z m m o s Plastic Limit Liquid Limil o- N V Water Content- o Penetration - Dark Gray, wet, Silty fine SAND (SM) with trace clay, loose to medium dense Boring terminated at 50 Y6l W.O.H = Weight OjHammer Figure PAGE 2 of 2 ETPROJECT: .,,,,,,,,,..�.,,�;, .,,,,,,•;,,. �,-���, LOG OF BORING No. B-6 Academic Instruction Facility Building P-002 PROJECT NO.: EC07-189G CLIENT: Kroskin Des'pn Group PROJECT LOCATION: Camp Geieer, North Carolina LOCATION: See Attached Boring Location Plan ELEVATION: INA DRILLER: W. Riddick LOGGED BY: G. Stalls, E.I.T. DRILLING METHOD: Mud Rotary(wash) DATE: 4-I8-07 DEPTH TO - WATER> INITIAL: - 6-feet AFTER 24 HOURS: g CAVING> -C L m w t] = Description n E O m n p m z m m U o ` y e TEST RESULTS Plastic Limit it Liquid Lim Water Content- o Penetration - 10 2 30 40 50 60 70 o 3 z ' a 3 z s s a 4 z a 2 ] a z ,o r ,z 15 9.6 3-inches TOPSOIL - I. ..:..._1.....1.. _..[.....1..... [.._.:..... _. ............. ...... .................... .. _;..-.:.....:-...-..i.....'..,.. i .... - - � ".... - .. :... - .....:.....:_ :....:.....:.....:... ... _ .............-....................... .:.....:...........:..... 1.. ... :.. _.:..... ... .. .. .:.....:.....:.....:.....:. :..... ..:....._... ..: .. .......:.....:.. .. .:..... .... ......................... .. t .2 Dark Brown -Tan, moist, poorly graded fine to medium SAND (SP- SM) with organics (Uncontrolled Fill) Tan, moist, Silty fine SAND (SM), loose lj'. i 7- :I:I:Fi ' (I: r r d:l.ir 'r'r i ,: 7:I: r t ''''' F! a:c t r [ �: '1:G r t i .1 XCI r ]', t'I: L'J ': rl. .. .. :I :I: c 1 1:1:t ., :C t+ 'N:is 1 :Gil 1 •I• I' I• ..1 . 5 3 Gray, moist, poorly graded fine.to medium SAND SP-SM with silt Y �P Yg ( ) poorly graded fine to medium SAND (SP), very loose to medium dense Wet from 6-feet Reddish Tan from 6-feet Fine to Coarse SAND from 6-feetri: Light Gray from 8-feet Reddish Tan from 13-feet Gray from 18-feet Fine to medium SAND from 18-feet 23 Light Gray, wet, Silty fine SAND (SM) with marine shell fragments and trace stone (Cemented Sand), medium dense -?to 4 5 to 15 6 za 7 6 25 0 Boring terminated at 30 ft. 35 W. O. H. = Weight Of Hammer Figure PAGE 1 of 1 ETPROJECT: BENSUMMENIEW ,,,.,,,„• pv.,,;,,,•,,,�,,,�, LOG OF BORING No. B-% Academic Instruction Facility: BuildinE P-002 PROJECT NO.: EC07-189G CLIENT: Kroskin Design Group PROJECT LOCATION: Camp CeiLe Noah Carolina ELEVATION: INA LOCATION: See Attached Boring Location Plan ' DRILLER: W. Riddick LOGGED BDATE: G. Stalls,18.07. DRILLING METHOD: Mud Rotary (wash) DEPTH TO - WATER> INITIAL: ¢ 6-feet AFTER 24 HOURS: S CAVING> C _ av O Descriptio'° 0 m to N m 0 U oo y ePenetration TEST RESULTS Plastic Limit Liquid limit Water Content- o - 10 20 30 40 60 60 70 2 3 2 3 0 s"- 10 6 s a 2 a 3 4 3 r is a 0 3-inches "TOP7:e jdw,)Sd' t t ! a:fit ': r' :C(r :� 9� t 1 4 a: r i i .1 x i i =i a. ! i..V. t 7:rl. .i a: t! ..... ' ' ' ' ' ..... ' ..........silt = ....... .......:.....:. _........ :. _..:.....:..... ........... l .. .:.....:.... ... ....:.. .. .:. ....:..... ................... _......._....... 1 an -Gray, moist, poorly graded fine to t (FILL), l. 2 TOPSOIL�.r.rTan-Gray, moist, Silty Clayey SAN'• 3 ' an -Gray, moist, poorly graded fine to medium SAND (SP-SM) will silt to poorly graded fine to medium SAND (SP), loose to medium dense Wet from 6-feet Tan from 6-feet Fine to Coarse SAND from 6-feet 13 4 ro 6 Light Gray, wet, Silty fine SAND (SM), loose 6 is 20 7 Light Gray, wet, Silty fine SAND (SM) with marine shell fragments and trace stone (Cemented Sand), medium dense 6 zs 30 9 Boring terminated at 30 ft.. W O.H. = Weight Of Hammer Figure PAGE 1 of 1 ETPROJECT: Acadcmic Instruction I utility: Building P-002 PROJECT NO.: FC07-I89G CLIENT: Rroskin Dc5igtl Croul PROJECT LOCATION: Camp Geiger, North Carolina _ LOCATION: See Attached Boring Location Plan ELEVATION: INA DRILLER: W. Riddick LOGGED BY: G. Stalls, E.I.T. LOG OF BORING DATE: 4-19-07 DRILLING METHOD: Mud Rota" (wash) NO. B-H DEPTH TO - WATER> INITIAL: $ 6-feet AFTER 24 HOURS: S CAVING> G oo TEST RESULTS t^ u a n o N o I # Plastic Limit Liquid Limit Description E z CO o U Water Content- o ❑ % O u o Penetration - 10 20 -30 40 50 60 70 s 0 6-inches Crushed STONE (GP -GM) j j: (i 5 .. _:.. _ ..�_ . . .... .....:.....:. .. Light Tan -Gray, moist, poorly graded fine to medium SAND (Sill to fine to medium SAND (SP-SM) with silt, loose to 1.:.': f i a poorly graded medium dense +:C! C .-' 2 44 . :.....:.__:..... Tan from I -foot .:...........:-.._.i_ 3 3 3 Light Gray, moist, Silty Clayey SAND (SM-SC), loose i ................... . Light Gray, wet, poorly graded fine to medium SAND (SP-SM) with silt to poorly graded fine to medium SAND (SP), loose :t:r i i .1:r, t r ..... 4 I:Gf Li 5 5 3.7 Q 10 ... .1:I:C I' .... 1:.....:... :. '_ ...:..... f.X v.. ...... ....... ........ Dark Gray from 13-feet t Y. i i. 4 :.. I'I:l t 1 i?I :tt1 6 a 4 .�... .... ... .. __... _..... :..._L.... ;..... 15 I I;Fri 1 1. < :.....:.....:.....:..... Gray, Silty fine SAND (SM), medium dense ..... : :: Dark wet, 23 iiii: " " 7 fi fi 12 _l.. ....� :' ...-..... .. .... .... ..:..._:.....:..... 20 Light Gray, wet, Clayey fine SAND (SC) with silt, dense 6 20 25 10 r3l 9 9 15 Q. . ............ ... ... _....:.....:... __. :.._...:. . ..... ... 4. Boring terminated at 30 ft. 35 W. O.N. = Weighf Of11ammer Figure PAGE 1 of 1 ET PROJECT: Academic Instruction Facility: Building P-002 PROJECT NO.: BC07-189G CLIENT: Krosk'n Design Croup PROJECT LOCATION: Camp Geiger North Carolina MMUMIIIIAMENEM LOCATION: See Attached Borine Location Plan ELEVATION: INA LOG OF BORING DRILLER: W. Riddick LOGGED BY: G. Stalls, F.I.T. DRILLING METHOD: Mud Rotary(wash) DATE: 4-19-07 No. PB-1 DEPTH TO - WATER> INITIAL: g 6-feet AFTER 24 HOURS: CAVING> L m N o TEST RESULTS Plastic Limit Liquid Limit L m w Description L 6 z 3 C m N u p U Water Content- o e Penetration - 10 20 30 40 50 60 70 0 24-inches TOPSOIL :... t a .:. .:.....:.....:... _:... Light Gray, moist, Clayey fine SAND (SC) with silt, loose :.....:..... .....'. 2 J .... ..:.. ...:.. ...:.. .. .:.. 4 .. .. .............. s Dark Gray, moist, poorly graded fine to medium SAND (SP-SM) with silt to Silty fine SAND (SM), loose ` 3 s 3 - Wet from 6-feet ..... 4 4 s Gray, wpoorly graded fine to coarse SAND (SP) with trace silt, loose, ..... ::::'.' S 4 3 ro i . i : . : . Boring terminated at 10 R. is zo 25 30 35 Weight OjHamnier Figure PAGE 1 of 1 6 ETPROJECT: • LOG OF BORING No. PB-2 Academic Instruction Facility: Buildin, P-002 PROJECT NO: EC07-189G CLIENT: Kroskin Design Group PROJECT LOCATION: Camp Geiger, North Carolina LOCATION: See Attached Boring Location Plan ELEVATION: INA DRILLER: W. Riddick LOGGED BY: G. Stalls, E.I.T. DRILLINGMETHOD: Mdltotary( ash) DATE: 4-19-07 DEPTH TO - WATER> INITIAL: $ 6-feet AFTER 24 HOURS: S CAVING> L od . Description n w a ci Nz N 0 m0 oo y 0 TEST RESULTS Plastic Limit Liquid Limit Water Content- c, Penetration - 1D 20 30 40 50 60 70 0 2 2 3 a- 4 a s , 5 n a 5 6. 4-inches'I'OPSOIL ..... ' iiiii ... ' ' teH ..:._..:.._.:.._.:....:.....:_...:..... ..:.....i.....�......i..... i.....: _.:.:. -: ' -" - .....:._...:__..:.....:.....:.....:..... .... ; .....:.... ..:.... ...... :. .... :..... ......................................... ....:. ....:......:.....:.....:.. ... :..... '... ..:... ..: .....: ..:..... :.. :.....:..... :..... -..:. . '.....: .:. ....:..... t Mottled Gray -Tan, moist, Silty Clayey SAND (SM-SC), loose my -Tan, moist, poorly graded fine to medium SAND (SP-SM) wiff • silt to Silty fine SAND (SM), loose to medico dense Dark Gray from 4-feet Wet from 6-feet With Clay from 8-feet 2 5 3 -- 4 5 Boring terminated at 10 ft. - 15 20 25 30 35 W.O.H = Weight OJHammer Figure PAGE 1 of 1 Academic Instruction Facility: Building P-002 PROJECT NO.: EC07-189G CLIENT: Kroskin Design Group PROJECT LOCATION: Camp Geiger, North Carolina LOCATION: See Attached Boring Location Plan ELEVATION: INA LOG OF BORING DRILLER: W. Riddick LOGGED BY: G. Stalls. E.I.T. DRILLING METHOD: Mud Rotary (wash) DATE: 4-19-07 �} NO. PB-J DEPTH TO - WATER> INITIAL: ?Z 5-feet AFTER 24 HOURS: -T CAVING> L TEST RESULTS t a o Description Liquid LiTtt p w mi paPlaslidLimit Water Content- o e Penetration - 4-inches TOPSOIL 3 ~'e—t t Mottled Gray -Tan, moist, Clayey fine SAND (SC) with silt, loose 3 Gray -Tan, moist, Silty fine SAND (SM), with trace clay, loose to ' ' ' ' a 2 medium dense' 3 Dark Gray from 4-feet < 3 ................ ....... ... ... ............ Wet from 5-feet ' s r s ::::: 6 .:..... :.....:..... 4 s 6 �.. $ 6 _.. Boring terminated at 10 ft. W.O.H. = Weight Of/fammer Figure PAGE 1 of 1 Symbol Description strata symbols Poorly graded gravel with silt Topsoil Uncontrolled Fill Silty sand Poorly graded sand with silt Silt 1111111111111� Poorly graded gravel .ter• Clayey sand 1 Uncontrolled Fill Poorly graded clayey silty sand El Poorly graded sand 11Notes: 'MBOLS Symbol Description Misc. Symbols s Water table during drilling 1. Exploratory borings were drilled on 4-19-07 using a 4-inch diameter continuous flight power auger. 2. No free water was encountered at the time of drilling or when re -checked the following day. 3. Boring locations were taped from existing features and elevations extrapolated from the final design schematic plan. These logs are subject to the limitations, conclusions, and recommendations in this report. I5. Results of tests conducted on samples recovered are reported on the logs. 22 ZJ 2 2 2 54 1, j 33 2_.._. 19 19 12 1 a 30 Strata svMbQls Poorly graded gravel with silt T.p,.1 Uncontrolled Fill Silly sand Poorly graded sand with silt 32 3 3 2 NM-24 0 2 WOH WON VVGH 43 1 33 2.8 6 m silt D4Poorly graded gravel Clayey sand Uncontrolled Fill Poorly graded clayey silty send —1 64 3 5 4 32 2 Y..Lis1 45 t4 i :I: t I I35 59 1614 9 9 11 22 25 5 I J: L t 1 6 id 24 4 ;IIf Li 3 4 36 7 12 4 8 7 62 13 5 7 7 f X L 1: L 'J: la :1: L V I { litre 45 12 19 16 1714 15 17 17 90 a fi 45 32 34 3 23 '1 2 3 2 23 ea it Q GET Solutions, Inc. GENERALIZED SOIL PROFILE PROJECT NO. EC07-1890 — 10 .] P P _. ....... p I.1d:tf 23 ;I•;r1 F 57 �� 32 22 L1--332 -333.9 3 3 J B L 1:. 3 L 9 3 N M-12.9 ] 3 2 3 I 0 •I.4 L: d a LL-33 3 3 I;t IJ 59 3♦ ]a 66 �1 <5 1 Y C i 10 _ 3 _ 5 ] ] IS 56 { a' 'I •;YI 3 d e 5 34 <5 08 'I �I�FI I .1:Ciif 3 d ;I h. F l d 3 3 6 20 e 15 ¢20 5 10 - - ______.___-__ .__._..... .. .. ao Strata e l ® Slit Poorly graded gravel Midi silt Poay graded gravel ,• j Topsoll � Clayey send Uncontrolled Flit Unwntrollatl Fill Silty sand Poorly 9rndad Clayey Silty sand Poorly graded sand El win sill E] Poorly graded sand GET Solutions, Inc. GENERALIZED SOIL PROFILE ^� DRAWN BY/APPROVED BY DATE C .AL;.P Academic Instruction Facility; Building P FIGURE N PROJECT NO. EC07-189G Symbol Description ;trata symbols Poorly graded gravel with silt Topsoil Uncontrolled Fill Silty sand Poorly graded sand with silt ® Silt Poorly graded gravel Clayey sand Pam Uncontrolled Fill Poorly graded clayey silty sand EI Poorly graded sand Notes• Y TO SYMBOLS Symbol Description Misc. Symbols �? Water table during drilling 1. Exploratory borings were drilled on 4-19-07 using a 4-inch diameter continuous flight power auger. 2. No free water was encountered at the time of drilling or when re -checked the following day. 3. Boring locations were taped from existing features and elevations extrapolated from the final design schematic plan. 4. These logs are subject to the limitations, conclusions, and recommendations in this report. 5. Results of tests conducted on samples recovered are reported on the logs. Soundinq:S-1 Cone:2583.107XX CONETEC GET SOL2Lt20 YLS Locat+on:Camp Geiger Daie:!BiRpri200? qt (tsf) fs (tsf) Rf (%) u (ft) SBTn 0 500 0.0 4.0 0.0 6.0 0 1800 0 12 0 —10 —20 —30 i H —40 u v —50 a —60 —70 —80 —90 —100 Max. Depth: 100.39 (ft) SBT. Soil Behavior Type (Robertson 1.090) Depth Ls.: 0.164 (fL) 4 Estimated Phreatic Surface I I i I I U defined �nm sa„a Mi:tvres G,.,Ily sane w Sa sa"a. s. m MM... i sands I $nnds 1 Gravelly Sand t" S. i � ss"ae I sand �u.w«, i sands Sand WxLut s I Sends S .d Niel urc5 Shear Wave Velocity-5-1 CONETEC camp Geiger 07-939 April 18, 2007 Shear Wove Velocity (fVs) 0500 1000 1500 0 I s I i 10 15 20 25 30 35 40 45 50 3 m 55 t w 0 60 65 70 75 80 85 90 95 100 105 2000 2509 Cone7ec Shear Wave Velocity Data Reduction Sheet CoNeTec m ® Hole: S-1 Location: Camp Geiger Cone: 2583.107 Date: 18-Apr-07 Source: Beam Source Depth 0.00 m Source Offset 1.45 m Tip Depth Geophone Travel Path Interval time Velocity Velocity Interval Interval (m) Depth(m) (m) (ms) (m/s) (ft/s) Depth (m) Depth (ft) 0.00 1.24 1.04 1,78 2.24 ' 2.04 2.51 6.38 113.1 371.0 1.54 5.06 3.25 3.05 3.37 5.16 168.1 551.4 2.54 8.35 4.26 4.06 4.31 5.36 174.7 573.1 3.55 11.65 5.26 5.06 5.27 4.97 192.6 632.0 4.56 14.96 6.27 6.07 6.24 6.12 158.5 520.0 5.57 18.26 7.28 7.08 7.22 3.22 305.9 1003.5 6.57 21.56 8.28 8.08 8.21 1.56 634.5 2081.7 7.58 24.87 927 9.07 9.18 1.72 562.1 1844.2 8.58 28.13 10:35 10.15 10.26 1.72 624.9 2050.3 9.61 31.53 11.36 11.16 11.26 1.72 580.7 1905.1 10.66 34.97 12.37 12.17 12.25 2,10 472.9 1551.6 11.66 38.27 13.37. 13.17 13.25 1.72 578.7 1898.6 12.67 41.56 14.37 14.17 14.25 1.94 512.9 1682'8 13.67 44.85 15.38 15.18 15.25 2.84 352.7 1157.1 14.67 48.14 16.39 16.19 16.25 2.49 404.0 1325.4 15.68 5145 17.39 17.19 17.26 3.25 309.1 1014.1 16.69 54.76 18.39 18.19 18.25 1.91 520.9 1708.9 17.69 58.05 19.48 19.28 19.33 1.72 628.4 2061.7 18.74 61.47 20.49 20.29 20.34 2.33 433.8 1423.2 19.79 64.91 21.48 21.28 21.33 1.88 523.6 1717.7 20.79 68.19 22.48 22.28 22.33 1.68 594.3 1949.8 21.78 71.46 23.49 23.29 23.34 2.16 466.1 1529.3 22.79 74.76 24.50 24.30 24.34 2.48 405.2 1329.4 23.79 78.06 25.50 25.30 25.34 1.93 519.9 1705.8 24.80 81.36 26.51 26.31 26.35 2.32 435.9 1430.2 25.81 84.67 27.52 27.32 27.36 2.09 481.7 1580.4 26.82 87.99 28.62 28.42 28.45 2.58 424.0 13912 27.87 91 A4 29.63 29.43 29.47 1.90 532.5 1746.9 28.92 94.89 30.64 30.44 30.47 2.51 401.3 1316.7 29.93 98.21 0 SUMMARY OF CBR TEST DATA Sample. CBR-1 CBR-2 CBR-3 Number . Sample. Depth 2 to 0.5 to 0.5 to (ft.) 2.5-feet 2-feet 2-feet Unified Soil Classification. SC SM-SC SC Symbol AASHTO Classification A-6(4) A-4(0) A-2-6(1) Symbol'.` .: Natural:::..: Moisture:::::: 17.9 18.2 23.9 Content:::''. Atterberg Limits 32/17/15 23/16/7 33/17/16 -. 11 /DLIDI .. -.;,..io_rass.mg .:. 48.9 36.5 34.1 #200_Sieve. : MaximumDry.:.' 118.4 117.4 114.6 Density, pc.;;,. Optimum 13.2 13.6 14.6 Moisture Spaked..ue CBR, :: 12.7 14.8 13.9 Val Unsoaked"CBR . 17.8 16.9 18.5 Resiliency 2.5 2.5 2.5 . Factor.:;:. . Swell % 0.25 0.08 0.12 Project: Building P-002• Academic Instructional Facility Project No: EC07-189G Client: Kroskin Design Group P.C. Date: May 10 2007 MOISTURE DENSITY TEST REPORT (PROCTOR CURVE) 12s II 121 116 -- ---- — ! I ! I — I 106 I� ZAV for i I Sp.G. _ _ ---` 1 — - I 2.65 6.5 9.0 11.5 14.0 16.5 19.0 21.5 Water content, % Test specification: ASTM D 698-91 Procedure A Standard Elev/ Classification Nat. Sp.G. LL PI %> %< USCS AASNTO Depth Moist. No.4 No.200 2 to 2.5 feet SC A-6(4) I7.9 32 15 0.0 48.9 TEST RESULTS MATERIAL DESCRIPTION Maximum dry density = 118.4 pcf Tan Clayey SAND (SC) with silt Optimum moisture = 13.2 % Project No. EC07-1990 Client: Kroskin Design Group Remarks: Project: Academic Instruction Facility; Building P-002 CBR HI Soaked CBR Value— 12.7 • Location: CBR 41 Resiliency Factor-2.5 MOISTURE DENSITY TEST REPORT (PROCTOR CURVE) GET SOLUTION) INC. Figure 0 Particle Size Distribution Report Q 100 90 4 j.piIII 1H, 80 - 70 LJJ 60- u- Z 50 !H p ki 40 W Q 30 20 - III 500 100 10 1 0.1 0.01 0.001 GRAIN SIZE - mm % COBBLES % GRAVEL % SAND SILT % CLAY 0.0 0.0 51.1 48.9 SIEVE PERCENT SPEC.* PASS? Soil Description SIZE FINER PERCENT (X=NO) Tan Clayey SAND (SC) with silt 3/8 in. 100.0 #4 100.0 #8 100.0 #10 99.9 Atterbera Limits #16 99.9 PL= 17 LL= 32. Pl= 15 #30 98.8 #40 97.5 Coefficients #50 94.8 D85= 0.202 D60— 0.117 D50= 0.079130= #60 91.4 D D15= D10= M 80.0 #100 70.5 #120 62.4 Cu= cc= 48.9 Classification USCS= SC AASHTC= A-6(4) Remarks CBR#1 (no specification provided) Sample No.: CBR#1 Source of Sample: Date: 5-11-07 Location: CBR#1 Elev./Depth: 2 to 2.5 feet GET Client: Yroskin Design Group Project: Academic Instruction Facility; Building P-002 .SOLUTIONS, INC. Project No: EC07-189G Figure MOISTURE DENSITY TEST REPORT (PROCTOR CURVE) 119.0 T- 116.5 I114.0 N II LI q 0 111.5 zAv for Sp.G. 2-65 109.0 J 106.5 7 9 13 15 17 19 Water content, % Test specification: ASTM D 698-91 Procedure A Standard Elev/ Classification Nat Sp.G. LL PI %> Depth USGS T-AASHTO MoisL No.4 No.200 0.5 to 2- feet SC-Sm A-4(0) I 1.8.2 23 7 0.0 36.5 TEST RESULTS MATERIAL DESCRIPTION Maximum dry density = 117.4 pcf Tan Silty Clayey SAND (SM-SC) Optimum moisture = 13.6 % Project No. EC07-189G Client: Kroskin Design Group Remarks: Project: Academic Instruction Facility; Building P-002 CBR #2 Soaked CBR Value = 14.8 a Location: CBR #2 Resiliency Factor= 2.5 MOISTURE DENSITY TEST REPORT (PROCTOR CURVE) GET SOLUTIONS, INC. Figure Particle Size Distribution Report GRAIN 7ILt - mm COBBLES %GRAVEL %SAND %SILT %CLAY SIEVE SIZE PERCENT FINER SPEC.* PERCENT PASS? (X=NO) 8 in. 100.0 4 in. 100.0 3/8 in. 100.0 _ #10 99.9 #16 99.8 #30 99.0 #40 98.0 #50 95.8 #60 92.9 #80 80.0 #100 65.6 #120 .53.6 #200' 36.5 Soil Description Tan Silty Clayey SAND (SM-SC) Atterbern Limits PL= 16 LL= 23 PI= 7 Coefficients D85= 0.196 D60= 0.139 D50= 0.116 D30= D15= D10= CU= Cc= Classification USCS= SC-SM AASHTO= A-4(0) Remarks CBR #2 (no specification provided) Sample No.: CBR #2 Source of Sample: .. Date: 5-11-07 Location: CBR #2 Elev./Depth: 0.5 to Meet G�� Client: Kroskin Design Group Cps Project: Academic instruction Facility; Building P-002 SOLUTIONS, INC. Project No: EC07-189G Fi ure MOISTURE DENSITY TEST REPORT (PROCTOR CURVE) 116.0 -LL ELI T-1 111.0 C 108.5 7 -T ZAV for 106.0 Sp.G. 2.65 —T P11, I Ei� 103.5 9 11 13 15 17 19 21 Water content, % Test specification: ASTM D 698-91 Procedure A Standard Elev/ Classification Nat Sp.G. LL PI % > % < Depth USCS AASHTO Moist. No.4 No.200 0.5 to 2- feet SC A-2-6(1) 23.9 33 16 0.0 34.1 TEST RESULTS MATERIAL DESCRIPTION Maximum dry density = 114.6 pcf Tan Clayey SAND (SC) . ) with silt Optimum moisture = 14.6 % Project No. EC07-189G Client: Kroskin Design Group Remarks: Project: Academic Instruction Facility; Building P-002 CBR#3 Soaked CBR Value = 13.9 e Location: CBR #3 Resiliency Factor= 2.5 MOISTURE DENSITY TEST REPORT (PROCTOR CURVE) GET SOLUTIONS, INC. Figure t Particle Size Distribution Report s GRAIN SIZE - mm %COBBLES % GRAVEL % SAND % SILT %CLAY 0.0 0.0 65.9 34.1 SIEVE SIZE PERCENT FINER SPEC.` PERCENT PASS? (X=NO) 3/8 in. 100.0 #4 100.0 #8 100.0 #10 100.0 #16 99.9 #30 99.5 #40 98.9 #50 96.8 #60 93.4 #80 76.5 #100 58.6 #120 46.7 #200 34.1 (no specification provided) Sample No.: CBR #3 Source of Sample: Location: CBR #3 Soil Description Tan Clayey SAND (SC) with silt Atterbera Limits PL= 17 LL= 33 PI= 16 Coefficients D85= 0.202 D60= 0.152 D50= 0.133 D30- D15= D10= Cu-- CC= Classification USCS= SC AASHTO= A-2-6(1) Remarks CBR #3 Date: 5-11-07 ElevlDepth: 0.5 to 2-fcct GET Client: Kroskin Design Group Project: Academic Instruction Facility; Building P-002 SOLUTIONS, INC. Project No: EC07-189G Figure___J Mai GET Solutions, Inc. pasta 504 East Elizabeth Street-, Suite 2 Elizabeth City, North Carolina 27909 (252) 335-9765; FAX (252) 335-9766 CLASSIFICATION SYSTEM FOR SOIL EXPLORATION Standard Penetration Test (SPT), N-value The soil samples are obtained with a standard 1.4" I.D., 2" O.D., 30" long split -Spann sampler. The sampler is driven with blows of a 140 lb. hammer falling 30 inches. The number of blows required to drive the sampler each 6-inch increment (4 incrementsfor each soil sample) of penetration was recorded and is shown an the boring logs. 'the sum of the second and third penetration incremem, is retired the SPT N-value. NON COHESIVE SOILS (SILT, SAND, GRAVEL and Combinations) Relative Density Very Loose 4 blows/ft. or less Loose 5 to 10 blows/ft. Medium Dense I l to 30 blows/ft. Dense 31 to 50 blows/ft. Very Dense 51 blows/ft. or more Particle Size Identification Boulders 8 inch diameter or more Cobbles 3 to 8 inch diameter Gravel Coarse 1 to 3 inch diameter Medium '/z to 1 inch diameter Fine '/q to'/a inch diameter Sand Coarse 2.00 mm to t/a inch (diameter of pencil lead) Medium 0.42 to 2.00 mm (diameter of broom straw) Fine 0.074 to 0.42 to. (diameter of human hair) Stilt 0.002 to 0.074 mm (cannot see particles) CLASSIFICATION SYMBOLS (ASTM D 2487) Coarse Grained Soils More than 50%retained on No. 200 sieve GW - Wqll-graded Gravel GP- Poorly graded Gravel GW-GM - Well -graded Gravel w/Silt GW-GC - Well -graded Gravel w/Clay GP -GM - Poorly graded Gravel w/Silt GP -GC - Poorly graded Gravel w/Clay GM - Silty Gravel GC - Clayey Gravel GC -GM - Silty, Clayey Gravel SW - Well -graded Sand SP - Poorly graded Sand SW-SM - Well -graded Sand w/Silt SW -SC - Well -graded Sand w/Clay SP-SM - Poorly graded Sand w/Silt SP-SC- Poorly graded Sand w/Clay SM - Silty Sand SC - Clayey Sand SC-SM - Silty, Clayey Sand Fine -Grained Soils 50%or mom passes the No. 200 sieve CL - Lean Clay CL-ML- Silty Clay ML - Silt OL- Organic Clay/Sik Liquid Limit 50%or greater CH- Fat Clay MH - Elastic Silt OH - Organic Clay/Silt Highly Organic Soils PT - Peat eaao 1 0l t Rev 2rl]200] COHESIVE SOILS (CLAY, SILT and Combinations) Consistency Very Soft 2 blows/ft. or less Soft 3 to 4 blows/ft. Medium Stiff 5 to 8 blows/ft. Stiff 9 to 15 blows/ft. Very Stiff 16 to 30 blows/ft. Hard 31 blows/ft. or more Plasticity Degree of Plastic iry Plasticity Index None to Slight 0-4 Slight 5-7 Medium 8-25 high to Very High 25 or more Expansion Potential Degree LL% PI46 Suction tsf High > 60 > 35 > 4.0 Marginal 50-60 25-35 1.5-4.0 Low < 50 < 25 < 1.5 None <35 <12 Relative Proportions Descriptive Terra Per ent Trace 1-10 Little 11-20 Some 21-35 And 36-50 Strata Changes In the column "Soil Description" on the boring log, the horizontal lines represent strata changes. Groundwater Readings Observations were made at the times indicated. Porosity of soil strata, weather conditions, site topography, etc., may cause changes in the water levels indicated on the logs. Depending on percentage of fines (fraction smaller than No. 200 sieve size), coarse -grained soils are classified as follows: Less than 5 percent GW, GP, SW,SP More than 12 percent GM, GC, SM. SC 5 to 12 percent Borderline cases requiring dual symbols P-002 ACADEMIC INSTRUCTION FACILITY Work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, -CAMP LEJEUNE, NC SECTION 32 92 19 RECEIVED SEEDING 10106 JUL 2 8 Z008 PART 1 GENERAL BY: 1.1 REFERENCES The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only. ASTM INTERNATIONAL (ASTM) ASTM C 602 (2007) Agricultural Liming Materials ASTM D 4427 (2007) Peat Samples by Laboratory Testing ASTM D 4972 (2001; R 2007) pH of Soils U.S. DEPARTMENT OF AGRICULTURE (USDA) AMS Seed Act (1940; R 1988; R 1998) Federal Seed Act DOA SSIR 42 (1996) Soil Survey Investigation Report No. 42, Soil Survey Laboratory Methods Manual, Version 3.0 1.2 DEFINITIONS 1.2.1 Stand of Turf 95 percent ground cover of the established species. 1.3 RELATED REQUIREMENTS Section 31 23 00.00 20.EXCAVATION AND FILL and Section 32 05 33 LANDSCAPE ESTABLISHMENT applies to this section for pesticide use and plant establishment requirements, with additions and modifications herein. 1.4 SUBMITTALS Government approval is required for submittals with a "G" designation;, submittals not having a "G" designation are for Contractor Quality Control approval. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL'PROCEDURES: SD-03 Product Data Wood cellulose fiber mulch Fertilizer Include physical characteristics,, and recommendations. SD-06 Test Reports SECTION 32 92 19 Page 1 P-002 ACADEMIC INSTRUCTION FACILITY Work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, CAMP LEJEUNE, NC Topsoil composition tests (reports and recommendations). „SD707 Certificates ' State certification and approval for seed SD-08 Manufacturer's Instructions Erosion Control Materials 1.5 DELIVERY, STORAGE, AND HANDLING 1.5.1 Delivery 1.5.1.1 Seed Protection Protect from drying out and from contamination during delivery, on -site storage, and handling. 1.5.1.2 Fertilizer, Gypsum, Sulfur, Iron and Lime Delivery Deliver to the site in original, unopened containers bearing manufacturer's chemical analysis, name, trade name, trademark, and indication of conformance to state and federal laws. Instead of containers, fertilizer, gypsum, sulphur, iron and lime may be furnished in bulk with certificate indicating the above information. 1.5.2 Storage - 1.5.2.1 Seed, Fertilizer, Gypsum, Sulfur, Iron and Lime Storage Store in cool, dry locations away from contaminants. 1.5.2.2 Topsoil Prior to stockpiling topsoil, treat growing vegetation with application of appropriatespecified non -selective herbicide. Clear and grub existing vegetation three to four weeks prior to stockpiling topsoil. 1.5.2.3 Handling Do not drop or dump materials from vehicles. 1.6 TIME RESTRICTIONS AND PLANTING CONDITIONS - 1.6.1 Restrictions Do not plant when the ground is frozen, snow covered, muddy, or when air temperature exceeds 90 degrees Fahrenheit. 1.7 TIME LIMITATIONS 1.7.1 Seed - Apply seed within twenty four hours after seed bed preparation. SECTION 32 92 19 Page 2 P-002 ACADEMIC INSTRUCTION FACILITY Work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, CAMP LEJEUNE, NC PART 2 PRODUCTS 2.1 SEED 2.1.1 Classification Provide State -certified seed of the latest season's crop delivered in original sealed packages, bearing producer's guaranteed analysis for percentages of mixtures, purity, germination, weedseed content, and inert material. Label in conformance with AMS Seed Act and applicable state seed laws. Wet, moldy, or otherwise damaged seed will be rejected. Field mixes will be acceptable when field mix is performed on site in the presence of the Contracting Officer. 2.1.2 Planting Dates Planting Season _ Season 1 Season 2 Temporary Seeding 1 Temporary Seeding 2 Temporary Seeding 3 2.1.3 Seed Mixture by Weight Planting Season Season 1 Season 2 Planting Dates Feb. 15 - Apr. 30 Sep. 1 - Oct. 31 Dec. 1 - Apr. 15 Apr. 15 - Aug. 15 Aug. 15 - Dec. 30 Variety Tall Fescue Pensacola Bahiagrass Kobe lespedeza Rye (grain) Tall Fescue Pensacola Bahiagrass Kobe lespedeza Rye (grain) Temporary Seeding 1 Rye (grain) Kobe lespedeza Temporary Seeding 2 German millet Temporary Seeding 3 Rye (grain) Rate (lbs/acre) 80 50 40 25 80 50 40 25 120 50 40 120 Proportion seed mixtures by.weight. Temporary seeding must later be replaced by Season 1 plantings for a permanent stand of grass. The same requirements of turf establishment for Season 1 apply for temporary seeding. 2.2 TOPSOIL 2.2.1 On -Site Topsoil Surface soil stripped and stockpiled on site and modified as necessary to meet the requirements specified for topsoil in paragraph entitled SECTION 32 92 19 Page 3 P-002 ACADEMIC INSTRUCTION FACILITY Work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, CAMP LEJEUNE, NC "Composition." When available topsoil shall be existing surface soil stripped and stockpiled on -site in accordance with Section 31 23 00.00 20 EXCAVATION AND FILL. 2.2.2 Off -Site Topsoil Conform to requirements specified in paragraph entitled "Composition." Additional topsoil shall be furnished by the Contractor. 2.2.3 Composition .. Containing from 5 to 10 percent organic matter as determined by the topsoil composition tests of the Organic Carbon, 6A, Chemical Analysis Method described in DOA SSIR 42. Maximum particle size, 3/4 inch, with maximum 3- percent retained on 1/4 inch screen. The pH shall be tested in accordance with ASTM D 4972. Topsoil shall be free of sticks, stones, roots, and other debris and objectionable materials. Other components shall conform to the following limits: pH 5.5 to 7.0 Soluble Sa1Ls 500 ppm maximum Sodium absorption ratio...... less than 12 2.3 SOIL CONDITIONERS Add conditioners to topsoil as required to bring into compliance with "composition" standard for topsoil as specified herein. 2.3.1 Lime Commercial grade agricultural limestone containing a calcium carbonate equivalent (C.C.E.) as specified in ASTM C 602 of not less than 80 percent. 2.3.2 Aluminum Sulfate Commercial grade. 2.3.3 Sulfur ' 100 percent elemental 2.3.4 Iron 100 percent elemental 2.3.5 Peat Natural product of peat moss derived from a freshwater site and conforming to ASTM D 4427. Shred and granulate peat to pass a 1/2 inch mesh screen and condition in storage pile for minimum 6 months after excavation. 2.3.6 Sand Clean and free of materials harmful to plants. 2.3.7 Perlite Horticultural grade. SECTION 32 92 19 Page 4 a P-002 ACADEMIC INSTRUCTION FACILITY Work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, CAMP LEJEUNE, NC 2.3.8 Composted Derivatives Ground bark, nitrolized sawdust, humus or other green wood waste material free of stones, sticks, and soil stabilized with nitrogen and having the following properties: 2.3.8.1 Particle Size Minimum percent by weight passing: No. 4 mesh screen 95 No. 8 mesh screen 80 2.3.8.2 Nitrogen Content Minimum percent based on dry weight: Fir Sawdust 0.7 Fir or Pine Bark 1.0 2.3.9 Gypsum Coarsely ground gypsum.comprised of calcium sulfate dihydrate 61 percent, calcium 22 percent, sulfur 17 percent; minimum 96 percent passing through 20 mesh screen, 100 percent passing thru 16 mesh screen. 2.3.10 Calcined Clay Calcined clay shall be granular particles produced from montmorillonite clay calcined to a minimum temperature of 1200•degrees F. Gradation: A minimum 90 percent shall pass a No. 8 sieve; a minimum 99 percent shall be retained on a No. 60 sieve; and a maximum 2 percent shall pass a No. 100 sieve. Bulk density: A maximum 40 pounds per cubic foot. 2.4 FERTILIZER 2.4.1 Granular Fertilizer Granular controlled release fertilizer containing the minimum percentages, by weight, of plant food nutrients as recommended by soil test. 2.4.2 Hydroseeding Fertilizer Controlled release fertilizer, to use with hydroseeding and composed of pills coated with plastic resin to provide a continuous release of nutrients for at least 6.months and containing the minimum percentages,, by weight, of plant food nutrients as recommended by soil test. 2.5 MULCH Mulch shall be free from noxious weeds, mold, and other deleterious materials. 2.5.1 Straw Stalks from oats, wheat, rye, barley, or rice. Furnish in air-dry condition and of proper consistency for placing with commercial mulch blowing equipment. Straw shall contrain no fertile seed. SECTION 32 92 19 Page 5 P-002 ACADEMIC INSTRUCTION FACILITY Work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, CAMP LEJEUNE, NC 2.5.2 Hay Air-dry condition and of proper consistency for placing with commercial mulch blowing equipment. Hay shall be sterile, containing no fertile seed. 2.5.3 Wood Cellulose Fiber Mulch Use recovered materials of either paper -based (100 percent) or wood -based (100 percent) hydraulic mulch. Processed to contain no growth or, germination -inhibiting factors and dyed an appropriate color to facilitate visual metering of materials application. Composition on air-dry weight basis: 9 to 15 percent moisture, pH range from 5.5 to 8.2. Use with hydraulic application of grass seed and fertilizer. 2.6 WATER Source of water shall be approved by Contracting Officer and of suitable quality for irrigation, containing no elements toxic to plant life. 2.7 EROSION CONTROL MATERIALS Erosion control material shall conform to the following: 2.7.1 Erosion Control Blanket 100 percent agricultural straw stitched with a degradable nettings, designed to degrade within 12 months. 2.7.2 Erosion Control Fabric Fabric shall be knitted construction of polypropylene yarn with uniform mesh openings 3/4 to 1 inch square with strips of biodegradable paper. Filler paper strips shall have a minimum life of 6 months. 2.7.3 Erosion Control Net Net shall be heavy, twisted jute mesh, weighing approximately 1.22 pounds per linear yard and 4 feet wide with mesh openings of approximately 1 inch square. 2.7.4 Erosion Control Material Anchors Erosion control anchors shall be as recommended by the manufacturer. PART 3 EXECUTION 3.1 PREPARATION 3.1.1 EXTENT OF WORK Provide soil preparation (including soil conditioners as required), fertilizing, seeding, and surface topdressing of all newly graded finished earth surfaces, unless indicated otherwise, and at all areas inside or outside the limits of construction that are disturbed by the Contractor's operations. 3.1.1.1 Topsoil Provide 4 inches of topsoil to meet indicated.finish grade. After areas SECTION 32 92 19 Page 6 P-002 ACADEMIC INSTRUCTION FACILITY Work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, CAMP LEJEUNE, NC have been brought to indicated finish grade, incorporate fertilizer, pH adjusters and soil conditioners into soil a minimum depth of 4 inches by disking, harrowing, tilling or other method approved by the.Contracting Officer. Remove debris and stones larger than 3/4 inch in any dimension remaining on the surface after finish grading. Correct irregularitiesin finish surfaces to eliminate depressions. Protect finished topsoil areas from damage by vehicular or pedestrian traffic. 3.1.1.2 Soil Conditioner Application Rates .Apply soil conditioners at rates as determined by laboratory soil analysis of the soils.at the job site. 3.1.1.3 Fertilizer Application Rates Apply fertilizer at rates as determined by laboratory soil analysis of the soils at the job site. 3.2 SEEDING 3.2.1 Seed Application Seasons and Conditions Immediately before seeding, restore soil to proper grade. Do not seed when ground is muddy, frozen, snow covered or in an unsatisfactory condition for seeding. If special conditions exist that may warrant a variance in the seeding dates or conditions, submit a written request to the Contracting .Officer stating the special conditions and proposed variance. Apply seed within twenty four hours after seedbed preparation. Sow seed by approved sowing equipment. Sow one-half the seed in one direction, and sow remainder at right angles to the first sowing. 3.2.2 Seed Application Method Seeding method shall be broadcasted and drop seeding orhydroseeding for areas less than 1,000 square feet. Hydroseeding shall be used for areas larger than 1,000 square feet. , 3.2.2.1 Broadcast and Drop Seeding Seed shall be uniformly broadcast at the rate specified. Use broadcast or drop seeders. Sow one-half the seed in one direction, and sow remainder at right angles to the first sowing. Cover seed uniformly to a maximum depth of 1/4 inch in clay soils and 1/2 inch in sandy soils by means of . spike -tooth harrow, cultipacker, raking or other approved devices. 3.2.2.2 Hydroseeding First, mix water and fiber. Wood cellulose fiber, paper fiber, or recycled paper shall be applied as part of the hydroseeding operation. Fiber shall .be added at 1,000 pounds, dry weight, per acre. Then add and mix seed and fertilizer to produce a homogeneous slurry. Seed shall be mixed to ensure broadcasting at the rate specified. When hydraulically sprayed on the ground, material shall form a blotter like cover impregnated uniformly with grass seed. Spread with one application with no second application of mulch. SECTION 32 92 19 Page 7 P-002 ACADEMIC INSTRUCTION FACILITY Work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, CAMP LEJEUNE, NC 3.2.3 Mulching 3.2.3.1 Hay or Straw Mulch Hay or straw mulch shall be spread uniformly at the rate of 2 tons per acre. Mulch shall be spread by hand, blower -type mulch spreader, or other approved method. Mulching shall be started on the windward side of relatively flat areas or on the upper part of steep slopes, and continued uniformly until the area is covered. The mulch shall not be bunched or clumped. Sunlight shall not be completely excluded from penetrating to the ground surface. All areas installed with seed shall be mulched on the same day as the seeding. Mulch shall be anchored immediately following spreading. 3.2.3.2 Mechanical Anchor Mechanical anchor shall be a V-type-wheel land packer; a scalloped -disk land packer designed to force mulch into the soil surface; or other suitable equipment. 3.2.3.3 Asphalt Adhesive Tackifier Asphalt adhesive tackifier shall be sprayed at a rate between 10 to 13 gallons per 1000 square feet. Sunlight shall not be completely excluded from penetrating to the ground surface. 3.2.3.4 Asphalt Adhesive Coated Mulch Hay or straw mulch may be spread simultaneously with asphalt adhesive applied at a rate between 10 to 13 gallons per 1000 square feet, using power mulch equipment which shall be equipped with suitable asphalt pump and nozzle. The adhesive -coated mulch shall be applied evenly over the surface. Sunlight shall not be completely excluded from penetrating to the ground surface. 3.2.4 Rolling Immediately after seeding, firm entire area except for slopes in excess of 3 to 1 with a roller not exceeding 90 pounds for each foot of roller width. If seeding is performed with cultipacker-type seeder or by hydroseeding, rolling may be eliminated. 3.2.5 Erosion Control Material Install in accordance with manufacturer's instructions, where indicated or as directed by the Contracting Officer. 3.2.6 Watering Start watering areas seeded as required by temperature and wind conditions. Apply water at a rate sufficient to insure thorough wetting of soil to a depth of 2 inches without run off. During the germination process, seed is to be kept actively growing and not allowed to dry out. 3.3 PROTECTION OF TURF AREAS Immediately after turfing, protect area against traffic and other use. SECTION 32 92 19 Page 8 P-002 ACADEMIC INSTRUCTION FACILITY work Order Number 58002 CAMP GEIGER, MARINE CORPS BASE, CAMP LEJEUNE, NC 3.4 TURF ESTABLISHMENT Seeded areas shall achieve a 95-percent coverage of the selected species and be weed free. Overseeding, fertilizing, watering and mowing shall be performed as necessary until turf establishment is complete and accepted by Contracting Officer. -- End of Section -- SECTION 32 92 19 Page 9 abouhblank July 16, 2008 Academic Instruction Facility @ Camp Geiger Per your request the Express stormwater and erosion control submittal meetings have been scheduled for a later date. The meetings will be July 28 at 1:30 with Carol Miller of Land Quality regarding the Sediment Control Plan and July 28 at 2:00 with Chris Baker regarding the stormwater plan. Please verify that this date and time works for you and for your client. Also, Robert, if you need help with your applications, please contact David Towler with the base. David has looked at so many of these applications by now that he understands what is expected. Thanks, Janet Russell Express Coordinator 1 01,1 7/16/2008 5:48 PM RE: Academic Instruction Facility, Camp Geiger Subject: RE: Academic Instruction Facility, Camp Geiger From: <rmsilver@transystems.com> Date: Wed, 16 Jul 2008 07:30:32 -0500 To: <Janet.Russel I@ncmaiI.net> CC: <david.towler cr usmc.mil> Janet: We are having difficulties in getting the permit packages finalized for this project and would like to re -schedule e meetings. Would it be possible to move both meeting to July 24th, 25th or 28th? Thanks for your assistance. Bob M. Silver, PE Senior Civil Engineer TranSystems Town Point Center 150 Boush Street, Ste. 1000 Norfolk, VA 23510 Main: 757-627-1112 Direct: 757-963-8933 Cell: 757-416-8070 Fax: 757-627-1113 www.transystems.com -----Original Message ----- From: Janet Russell [mailto:Janet.Russell@ncmail.net] Sent: Monday, July 14, 2008 5:13 PM To: NF-Bob Silver Cc: Towler GS05 David W Subject: Re: Academic Instruction Facility, Camp Geiger Mr. Silver: You are scheduled to meet with Carol Miller with Land Quality at 1:30 on 7/21/08 and with Chris Baker at 2:00 on 7/21/08. We look forward to seeing you then. Thanks, Janet Russell ilver@transystems.com wrote: Meeting on the 21st is acceptable, please reserve the time as noted. Bob Silver -----Original Message ----- From: Janet Russell [mailto:Janet.Russell@ncmail.net] Sent: Thursday, July 10, 2008 4:32 PM To: NF-Bob Silver; Towler GS05 David W Cc: Carol Miller Subject: Academic Instruction Facility, Camp Geiger July 10, 2008 *Academic Instruction Facility, Camp Geiger* Gentlemen: The Express Stormwater submittal meeting has been scheduled with* Chris Baker on I of2 7/16/2008 10:37 AM RE: Academic Instruction Facility @ Camp Geiger Subject: RE: Academic Instruction Facility a Camp Geiger From: <rmsilver@transystems.com> Date: Wed, 16 Jul 2008 18:42:02 -0500 To: <Janet.Russel I@ncmai1.net>, <david.towler@usmc.mil> CC: <ssteele@virtexco.com>, <jgjorge a transystems.com>, <wswills@transystems.com> Janet: We have confirmed with David Towler that he is available to attend both meetings on July 28th. We appreciate your re -scheduling these meetings so we can ensure we are properly prepared. We look forward to meeting with Carol and Chris on the 28th. Bob Silver -----Original Message ----- From: Janet Russell[mailto:Janet.Russell@ncmail.net] Sent: Wednesday, July 16, 2008 5:49 PM To: NF-Bob Silver; Towler GS05 David W Subject: Academic Instruction Facility @ Camp Geiger July 16, 2008 *Academic Instruction Facility @ Camp Geiger * Robert: Per your request the Express stormwater and erosion control submittal meetings have been scheduled for a later date. The meetings will be* July 28 at 1:30 with Carol Miller of Land Quality* regarding the Sediment Control Plan and *July 28 at 2:00 with Chris Baker* regarding the stormwater plan. Please verify that this date and time works for you and for your client. Also, Robert, if you need help with your applications, please contact David Towler with the base. David has looked at so many of these applications by now that he understands what is expected. Thanks, Janet Russell Express Coordinator I of 1 7/21/2008 10:11 AM Re: Academic Instruction Facility, Camp Geiger Subject: Re: Academic Instruction Facility, Camp Geiger From: Janet Russell <Janet.Russel I a ncmaiI.net> Date: Mon, 14 Jul 2008 17:13:30 -0400 To: rmsilver a transystems.com CC: Towler GS05 David W <david.towler a usmc.mil> BCC: Carol Miller <Carol.MiIler@ncmai1.net> Mr. Silver: You are scheduled to meet with Carol Miller with Land Quality at 1:30 on 7/21/08 and with Chris Baker at 2:00 on 7/21/08. We look forward to seeing you then. Thanks, Janet Russell lver@transystems.com wrote: net: Meeting on the 21st is acceptable, please reserve the time as noted. Bob Silver -----Original Message ----- From: Janet Russell[mailto:Janet.Russell@ncmail.net] Sent: Thursday, July 10, 2008 4:32 PM To: NF-Bob Silver; Towler GS05 David W Cc: Carol Miller Subject: Academic Instruction Facility, Camp Geiger July 10, 2008 *Academic Instruction Facility, Camp Geiger* Gentlemen: The Express Stormwater submittal meeting has been scheduled wither Chris Baker on July 21, 2008 at 2:00 PM� here in the Wilmington Regional Office, 127 Cardinal Drive Extension, Wilmington, 28405. Mr. Silver, hopefully you have designed your project to meet the Phase II stormwater rules. I am attaching a copy of the Session Law that outlines the details of those requirements. In needed, refer to attachment starting around page 13. Please respond within 2 business days to confirm and reserve the submittal meeting date. If this time or date does not work with your schedules, please let me know immediately so that we can offer an alternate. Thank you, Janet Russell Express Coordinator I of 1 7/14/2008 5:13 PM RE: Academic Instruction Facility, Camp Geiger Subject: RE: Academic Instruction Facility, Camp Geiger From: "Towler CIV David W" <david.towler n usmc.mil> Date: Mon, 14 Jul 2008 14:14:59 -0400 To: <rmsilver@transystems.com>, <Carol.Miller a ncmail.net>, <Janet.Russel l@ncmai1.net> CC: <ssteele@virtexco.com>, "Baker CIV Carl IT' <carl.h.baker@usmc.mil>, <jgjorge a transystems.com> Monday, July 21 at 1:30 pm is fine for the Base. I'll 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: rmsilver@transystems.com [mailto:rmsilver@transystems.com] Sent: Friday, July 11, 2008 17:13 To: Carol.Miller@ncmail.net; Janet.Russell@ncmail.net Cc: Towler CIV David W; ssteele@virtexco.com; Baker CIV Carl H; jgjorge@transystems.com Subject: RE: Academic Instruction Facility, Camp Geiger Carol: Yes, I would like to schedule the LQ Review for 1:30 on Monday, July 21st. By copy I am requesting the Base advise if they are available at that time. Is this all in the same building? Thanks, Bob Silver -----Original Message ----- From: Carol Miller[mailto:Carol.Miller@ncmail.net] Sent: Friday, July 11, 2008 10:05 AM To: Janet Russell Cc: NF-Bob Silver; Towler GS05 David W Subject: Re: Academic Instruction Facility, Camp Geiger Mr. Silver, do you want to schedule the LQ review on the same day? If so I would prefer to schedule it before SW at say 1:30. Please let me know if that is acceptable. Thanks, Carol Janet Russell wrote: July 10, 2008 *Academic Instruction Facility, Camp Geiger* Gentlemen: The Express Stormwater submittal meeting has been scheduled with* Chris Baker on July 21, 2008 at 2:00 PM* here in the Wilmington Regional Office, 127 Cardinal Drive Extension, Wilmington, 28405. Mr. Silver, hopefully you have designed your project to meet the Phase I of 2 7/14/2008 3:25 PM about:blank July 10, 2008 Academic Instruction Facility, Camp Geiger Gentlemen: The Express Stormwater submittal meeting has been scheduled with Chris Baker on July 21, 2008 at 2:00 PM here in the Wilmington Regional Office, 127 Cardinal Drive Extension, Wilmington, 28405. Mr. Silver, hopefully you have designed your project to meet the Phase II stormwater rules. I am attaching a copy of the Session Law that outlines the details of those requirements. In needed, refer to attachment starting around page 13. Please respond within 2 business days to confirm and reserve the submittal meeting date. If this time or date does not work with your schedules, please let me know immediately so that we can offer an alternate. Thank you, Janet Russell Express Coordinator I of 1 7/10/2008 4:31 PM Jw 50br-) 117�- North Carolina Department of Environment and Natural Resources AMRequest for Express Permit Review NCDENR For DENR Use ONLY Reviewer: G91S Submit � /z6 Time: Confirm 7--1 L_ uftfer;�v FILL-IN all the information below and CHECK the Permits) you are requesting for express review. FAX or Email the completed form to Express Coordinator along with a completed DETAILED narrative, site plan (PDF file) and vicinity map (same items expected in the application package of the project location. Include this form in the application package. o • Asheville Region -Alison Davidson 828.296-4698;alison.davidson(dncmail.net • Fayetteville or Raleigh Region -David Lee 919-791-4203; david.leeng ncmail.net • Mooresville & -Patrick Grogan 704-663-3772 or patrick.gronan(giincmail.net • Washington Region -Lyn Hardison 252-946-9215 or lvn.hardison(oncmail.net • Wilmington Region -Janet Russell 910-350-2004 or ianet.russell(a0cmail.net NOTE: Project application received after 12 noon will be stamped in the following work day. Project Name: ACADEMIC INSTRUCTION FACILITY, CAMP GEIGER County: ONSLOW Applicant: CARL BAKER, BY DIRECTION OF THE CO Company: USMC, CAMP LEJEUNE, NC Address: 1005 MICHAEL ROAD City: CAMP LEJEUNE, State: NC Zip: 28547 D E C E I V E D Phone:910-451-2213 Fax: - - Email: cad.h.bakerAusmc.mil Project is Drains into SC waters -k\QW Project Located in WHITE OAK River Basin JJ� $ 2008 Engineer/Consultant: Robert M. Silver, P.E. Company: Transystems Address: 150 BOUSH STREET, SUITE 1000City: NORFOLK, State: VA Zip: 23510 DWQ Phone: 757-963-8933 Fax::757-627-1113 Email: rmsilver(a)transystems.com PROD a (Check all that apply) ❑ Scoping Meeting ONLY ❑ DWQ, ❑ DCM, ❑ DLR, ❑ OTHER: ❑ Stream Origin Determination: # of stream calls — Please attach TOPO map marking the areas in questions ® State Stormwater ❑ General ❑ SFR, ❑Bkhd & Bt Rmp, ❑ Clear & Grub, ❑ Utility ❑ Low Density ❑ Low Density -Curb & Gutter _ # Curb Outlet Swales ❑ Off -site [SW (Provide permit #)j ® High Density -Detention Pond 1 # Treatment Systems ❑ High Density -Infiltration _ #Treatment Systems ❑ High Density -Bio-Retention _ # Treatment Systems ElHigh 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 10 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) No Minor Variance: ❑ No ❑ YES Tr•nsyst•ma ❑ No Major General Variance ❑ No ❑ YES Systems Town Point center No 401 Application required: ❑Yes ® No If YES, ❑ Regular 150 Boush street, Suite lone Perennial, Blue line stream, etc on site ❑ yes ® No Norfolk, VA 23510 Direct 757-963-8933 For DENR use only Robed M. Silver, P.E. Main 757-627-1112 ATotal Fee Amount $ ssaiate/Assisram Vhe Presieem Fax 757-627-1113 Senior civil Engine' SUBMITTAL DATES Fee rmsi Iver@traneystems.com wwwEransystems.com Variance ❑ Ma'; ❑ Min $ I 401: $ I Stream Deter,_ $ Co '1 01 o.". ')-10-06 CD106 REMOVE BUILDING AND FOUNDATION TC706 TC707, TC708. TC709 CD103 0 CD106 U 3RD ULJUMITHLSTREJUUL C-� n STH STREET }� CO O,--3 ❑ 6TH STREET 7iH STREET 0 o ° i � o o gTH TREET o o aoP� m 0 •9TH STREET B A m v A I O1H STREET 58 o 0 11TH STREET o � 4 o � 0 IMAIN ENTRANCE TO CAMP GEIGER OVERALL SITE DEMOLITION PLAN SCALE: 1 IN. = 400 FT. CD107 ACADEMIC INSTRUCTION FACILITY SITE LOCATION CD101, CD102 A REMOV AND Fl o rc7sz, C0104 0 O qo REMOVE BUILDING 0 AND FOUNDATION TC860, TC861 CD105 or,aw�ms.wDA,,...,ar., V T A T a. g C STREET m�r Q ...0 / saz I i I a j I: I II j t 15 U I I I � d ACADEMIC INSTRUCTION FACILITY II II j V I Is'so �1 O El 00 � of V �1y I I I I II I 0 I I I�1 it s g A II it j LI III e w re' so ro. li I — II I I O 24' m IT m ill In y I I I IIII I I I .e fitE�II k W I nrrr'OS.o�.o� I4ypp �r'IIIILk4 U3� IL li 2 k ESTREET i� Ilg la Lo, 4 r g ! 9lalea NAVAL iRLILIiIES ENpINEERINp CgAMONO—MI4ATLNffIN .oeor... B$�! pp e e T^ wAwE CORGS b5E [B GwV ILEIME. x ACADEMIC { INSTRUCTION FACILITY CAMP GEIGER � k n „ p '�A OVERALL SITE PLAN N u A Academic lnstruction Facility, Camp Geiger, MCB Camp Lejeune, NC Subject: Academic Instruction Facility, Camp Geiger, MCB Camp Lejeune, NC From: <rmsilverc transystems.com> Date: Mon, 7 Jul 2008 14:02:31 -0500 To: <Cameron.Weaver@ncmai1.net> CC: <ssteele a virtexco.com>, <morcutt n virtexco.com>, <jajorge a transystems.com>, <carl.h.baker cr usmc.mil> Mr. Weaver: We are submitting herewith the Request for Express Permit Review together with a detailed narrative of the project, a location map, a vicinity map, an Overall Site Demolition Plan and an Overall Site Plan for your review and information. Should you require any additional information at this time, please feel free to contact me. We look forward to meeting with you to initiate the permit review process for this project. Sincerely, Bob M. Silver, PE Senior Civil Engineer Systt�ms TranSystems Town Point Center 150 Boush Street, Ste. 1000 Norfolk, VA 23510 Main: 757-627-1112 Direct: 757-963-8933 Cell: 757416-8070 Fax:757-627-1113 www.transystems.com Note: The information contained in this transmission as well as all documents transmitted herewith are privileged and confidential information. This information is intended only for the use of the individual or entity to whom it was sent, and the recipient is obliged to protect this information as appropriate. If the recipient of the e-mail, and/or the documents attached is not the intended recipient, you are hereby notified that any dissemination, distribution or reproduction, copy, or storage of this communication is strictly prohibited. Thank you. REQUEST FOR EXPRESS form - AIF Camp Geiger.doc Overall Demo Plan.pdf Overall Site Plan.pdf I of 2 7/8/2008 9:33 AM Stormwater Narrative 7/7/2008 Academic Instruction Facility Camp Geiger, MCB Camp Lejeune, NC 1. GENERAL INFORMATION a. Project Name: Academic Instruction Facility b. Address: C Street, Camp Geiger, MCAS New River, Jacksonville, NC c. Project Site Area: 200+ Acres (Camp Geiger), 12 Acres for Project d. Disturbed Area: 9.8 Acres e. Wetlands Impacts: None, NEPA required review did not determine any wetlands f. Ownership: U.S. Government g. Tax Parcel ID Number: N/A h. Pre-1988 Built Upon Area: N/A i. Project Phasing: The project will be constructed under a single construction contract. Demolition of the buildings included in the contract are not required to facilitate construction of the Academic Instruction Facility. Some of the buildings to be demolished are currently occupied and will require completion of the new Academic Instruction Facility to allow the occupants to be relocated to new spaces. The remainder of the buildings are unoccupied and can be demolished at any time during the contract. Construction of the new Academic Instruction Facility building will be done concurrent with the site improvements including stormwater facilities. j. The existing Base water distribution and wastewater collection systems will be utilized to provide service to the new facility. k. There are no historic sites or projects associated with this project. I. Non -Compliance Issues: None. 2. STORMWATER INFORMATION a. Project is located within the drainage area of Edwards Creek (Stream Index #19-13), a tributary to the New River within the White Oak River Basin. Edwards Creek is classified as SC, HOW, NSW waters. b. The main project site (AIF site) will have an impervious cover of approximately 60% upon completion of the project and is therefore considered a high density stormwater design. The project area exceeds one acre and is therefore subject to the NPDES permitting program. c. The main project site (AIF site) will have an impervious cover of approximately 60% upon completion of the project including the surface area of the wet pond. The demolition of the existing buildings will eliminate approximately 63,000 square feet (1.44 Acres) of impervious surface area and replace it with pervious, vegetated surfaces. d. The proposed stormwater management plan includes the construction of on -site collection system conveying runoff from all impervious surfaces to a single wet detention pond prior to discharging to an existing storm drainage system. e. The stormwater management plan for this project plans to utilize the existing 24-inch storm drainage system along 6t^ Street to collect surface runoff from the existing roadway, a portion of the pervious area adjacent to 6t^ Street and the northern entrance to the parking lot. This area and runoff conditions are comparable to the existing conditions drained by this system and will result in a decrease in runoff conveyed by the existing pipe system. All of the remaining site area (pervious and impervious) will be collected by the on -site collection system and treated in the wet detention pond. f. The project area has no known buffer requirements nor does it impact any known buffers. g. There are no known areas of special concern associated with this project. Stormwater Narrative Academic Instruction Facility Camp Geiger, MCB Camp Lejeune, NC 71712008 h. The existing 24-inch storm drainage system along 6th Street collects surface runoff from areas outside of the project limits. Runoff from areas north of 6t^ Street and west of C Street contribute to this existing system. The system continues eastward out of the project limits across E Street. It is the intent of this project to maintain this system and the off -site drainage areas and not include this runoff in the on -site treatment system. The only change proposed to this existing system is the addition of a new drop inlet near the north entrance from 6t^ Street to collect runoff from the roadside swale and the conversion of the existing drop inlet adjacent to the entrance drive to a manhole. I. The project is completely contained within the boundaries of Camp Geiger, a U.S. Government property. j. Soils: Based on the National Cooperative Soil Survey, the main project site (exclusive of building demolition areas) consists of 98% Goldsboro -Urban land complex with 0 to 5 percent slopes and 2% Baymeade-Urban land complex with 0 to 6 percent slopes. The Baymeade-Urban land complex is located in the southeastern corner of the site near the intersection of 7w and E Streets. Geotechnical investigations were performed in April, 2007-by GET Solutions, Inc and in May, 2008 by MACTEC Engineering and Consulting, Inc. which included several standard penetration test borings around the site. The general subsurface conditions found include a surface layer of topsoil and/or fill material extending down to a maximum of 4 feet with silty or clayey sands below this layer. A lean silt layer was encountered at a depth of 19 to 28 feet in a portion of the site. Groundwater was encountered at depths of 5 to 6 feet below existing surface with normal seasonal fluctuations of 1 to 1.5 feet expected. The on -site material is suitable for use as fill within the limits of the project and will be used to the maximum extent practical. If borrow material is required, it will be obtained from private sources outside the limits of MCB Camp Lejeune. 3. PROJECT DESCRIPTION The purpose of the project is to construct a consolidated Academic Instruction Facility for the School of Infantry at Camp Geiger, Marine Corps Base Camp Lejeune, North Carolina. The single, two-story building will accommodate classrooms, administrative spaces and open space areas for processing incoming soldiers. Site improvements include canopies at the main entrance and the drop-off area, concrete walks, asphalt paved parking lot, vegetated open space and a stormwater management facility. The current site is open and contains a gravel parking lot, a paved tennis court, a small paved parking lot and modular building with scattered trees and grass vegetation. The 73,000 square foot, two- story building will occupy a footprint of 41,000 square feet in the western portion of the site. The building is setback from the adjacent roadways to meet Force Protection guidance established by the military. The paved parking lot for privately owned vehicles will be located east of the building and will be setback from the building to meet the same Force Protection criteria. The parking lot is sized to accommodate 250 vehicles and will be surfaced with asphalt concrete pavement. All of the existing surface features, including the gravel parking lot, tennis court and modular building will be removed to facilitate the new construction. The project also includes the demolition of 13 existing buildings within the Camp Geiger area outside of the area for the new instruction facility. These buildings will be demolished in their entirety, including foundations and the cutting and capping of utility services. The final surface where the buildings stood will be graded to drain to existing surface features and will be stabilized with permanent grass vegetation. The main building site consists of 7.85 acres of paved and vegetated surfaces using the centerline of the adjacent roadways as the project limits. The actual area of disturbance will be 7.3 acres. The total site area for the 13 buildings to be demolished is approximately 4 acres of which 2.5 acres will be disturbed. The total area of disturbance for the project is 9.8 acres. Stormwater Narrative 71712008 Academic Instruction Facility Camp Geiger, MCB Camp Lejeune, NC 4. GRADING AND STORMWATER MANAGEMENT The existing site is divided into three drainage areas which contribute to two existing storm drainage systems. Runoff in the northwestern portion of the site is collected in a roadside swale adjacent to 6th Street which conveys the runoff to a drop inlet near the center of the block. This drop inlet is connected to a 24-inch storm drain line which parallels 6h Street from C Street to E street (west to east across the site). The northeastern portion of the site drains by overland flow and roadside swales to an existing drop inlet near the intersection of 6th Street and E Street which is connected to the same 24-inch storm drain along 6th Street. A 30-inch storm drain extends from this inlet across E Street and continues eastward out of the project site. This storm drainage system also collects runoff from areas on the north side of 6th Street and west of C Street. The remaining portion of the site drains by overland flow to the roadside swale along 7h Street which flows from west to east. This swale is collected by a drop inlet in the southeastern corner which is connected to a 30-inch storm drain that continues eastward out of the project site. Both of the stone drain systems eventually outfall into an open ditch that leaves Camp Geiger along it's eastern boundary and eventually discharges into Edwards Creek, a tributary of the New River within the White Oak River Basin, Edwards Creek is listed as Index Stream #19-13 and is classified as having SC, HQW and NSW waters. The proposed stormwater management plan for the Academic Instruction Facility project is based on making use of the existing storm drain line along 6th Street and directing the majority of the site to a new wet pond which will discharge into the existing storm drain line in the southeast corner of the site. The 24-inch storm drain line along P Street currently conveys runoff from areas outside of the project site in addition to collecting the surface flow from approximately 40% of the site. It is desired to keep the off -site runoff separated from the on -site runoff that will require treatment. Therefore, the existing storm drain line along 6r^ Street will be maintained and will continue to discharge via the 30-inch storm line under E Street to the east. On the western side of the site, a small strip of vegetated surface area directly adjacent to 6h Street will be collected in a roadside swale which will feed a new drop inlet connected to the 24-inch storm drain. This inflow will replace the runoff that was being intercepted by the drop inlet located in the center of the 6"h Street frontage. This existing drop inlet will be converted to a manhole to maintain access to the storm drain while eliminating any conflict between the structure and the new parking lot entrance. On the eastern side, the parking lot entrance and the vegetated strip between the new parking lot and 6r^ Street will be collected in a roadside swale which will be intercepted by the existing drop inlet in the northeast corner of the site. In addition, the vegetated strip along the E Street frontage will continue to drain northward into the drop inlet at the intersection with 6"h Street. This allows the grading along the existing roadways to be maintained while reducing the runoff contributing to the existing storm drain system along 6th Street. The remainder of the site, which includes the building, parking lot and portions of C Street and 7r^ Street, will be collected by an on -site storm drainage system and conveyed to a new wet pond to be located in the southeast corner of the site. The wet pond will provide water quality treatment and storage to attenuate the peak discharge from the site so that is does not exceed the peak discharge from the existing site into the 30-inch system at the intersection of 7th and E Streets. The project will result in the impervious cover for the project site reaching 60%, making this a high density development. The design for the wet pond will be based on the requirements to attain a 90% TSS pollutant removal efficiency. The outlet from the wet pond will be connected directly to the existing 30-inch storm pipe at the southeast corner of the site.