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HomeMy WebLinkAboutSW8090528_HISTORICAL FILE_20090723STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 CA062`6 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE Zoc)C 123 YYYYMMDD ®0A NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Governor Director July 23, 2009 Mr. Edward L. Wills, Jr, Plant General Manager Carolina Power and Light Co. D/B/A Progress Engery Carolinas, Inc. 8470 River Road SE Southport, NC 28461 Subject: Stormwater Management Permit No. SW8 090528 Brunswick Nuclear Plant - Unit 1 Capacitor Bank Installation High Density Commercial Sand Filter Project Brunswick County Dear Mr. Wills: Dee Freeman Secretary The Wilmington Regional Office received a complete Stormwater Management Permit Application for Brunswick Nuclear Plant - Unit 1 Capacitor Bank Installation on July 17, 2009. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Session Law 2008-211 and Title 15A NCAC 21-1.1000. We are forwarding Permit No. SW8 090528, dated July 23, 2009, for the construction of the subject project. This permit shall be effective from the date of issuance until July 23, 2019, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Christine Nelson, or me at (910) 796-7215. Sincerely, Ge'orgette Scott Stormwater Supervisor Division of Water Quality GDS/can: S:\WQS\STORMWATER\PERMIT\090528.ju109 cc: Michael Hanson, Dewberry & Davis, Inc. Marty McGowan, Environmental Supervisor, Progress Energy Carolinas, Inc Brunswick County Inspections Brunswick County Engineering Christine Nelson Wilmington Regional Office Central Files Wilmington Regional Office 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 One Phone: 910-796-7215 \ FAX: 910-350-2004 \ Customer Service: 1-877-623-6748 NorthCarol i na Internee. v .nmatem liry.org Naturally An Equal Opportunity \ Affirmative Action Employer State Stormwater Management Systems Permit No. SW8 090528 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 Edward L. Wills, Jr., Plant General Manager & Carolina Power and Light Co. D/B/A Progress Energy Carolinas, Inc. Brunswick Nuclear Plant - Unit 1 Capacitor Bank Installation 8470 River Road SE, Southport, Brunswick County FOR THE construction, operation and maintenance of one sand filter in compliance with Session Law 2008-211 and the provisions of 15A NCAC 2H .1000 (hereafter collectively referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until July 23, 2019 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 1.9 of this permit. The stormwater control has been designed to handle the runoff from 34,848 square feet of impervious area. Other incidental impervious area (4,792 square feet) has been approved for the driveway access and will be treated through grassed swales. 3. A vegetated filter has been waived for this sand filter since it has been designed to handle twice the design storm as detailed in Section 1.8 on page 3. 4. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 5. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. Page 2 of 8 State Stormwater Management Systems Permit No. SW8 090528 (.1 rl 9 0 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. The project shall maintain a 50' wide buffer measured from the normal pool of impoundments, the banks of rivers and streams and the mean high water line of tidal waters. All runoff being directed into wetlands shall flow into and through those wetlands at a non -erosive velocity. The following design elements have been approved for this sand filter stormwater facility, and must be provided in the system at all times. a. Drainage Area, acres: Onsite, ft2: Offsite, ft2: b. Total Impervious Surfaces, ft2: C. Design Storm, inches: d. Sediment Chamber Depth, ft.: e. Sand Chamber Depth (weir to bottom) ft: f. Filter Media Depth, ft.: g. Sediment Chamber Bottom Elev. fmsl: h. Sand Chamber Bottom Elev., fmsl: i. Sediment Chamber Surface Area, ft2: j. Sand Chamber Surface Area, ft2: k. Weir Elevation, fmsl: I. Max. Head on Filter (weir to top of sand) ft: m. Permitted Storage Volume, ft3: n. Orifice Diameter, inches: o. Time to Draw Down, hours: p. Seasonal High Water Table, FMSL: q. Receiving Stream / River Basin: r. Stream Index Number: S. Classification of Water Body: II. SCHEDULE OF COMPLIANCE 1.2 52,272 0 34,848 3.0 3.15 3.15 2.0 20.15 20.15 2,250 4,500 23.3 1.30' 8,775 6 " 0 11.4 18.15 Nancy's Creek / Cape Fear 18-88-1-3 "Sc, HQW, Sw" No person or other legal entity shall alter the approved stormater management system, or fill in, alter, or pipe any drainage feature, including swales, shown on the approved plans as part of the stormwater management system, unless and until the permittee submits a modification to the permit and receives approval from the Division. The permittee is responsible for verifying that the proposed built -upon area for the entire project does not exceed the allowable built -upon area. 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. 4. 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. Page 3 of 8 State Stormwater Management Systems Permit No. SW8 090528 5. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. Infiltration systems should not be used as erosion control devices, due to the potential clogging. 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. 6. 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 the approved plans, regardless of size. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area. e. Further subdivision, acquisition, 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. 7. The Director may determine that other revisions to the project should require a modification to the permit. 8. 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. 9. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater system function at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of filter media, bypass structures, orifice catch basins and piping. g. Access to all components of the system must be available at all times. 10. 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. 11. Permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Page 4 of 8 State Stormwater Management Systems Permit No. SW8 090528 12. Prior transfer of the permit, the stormwater facilities will be inspected by DWQ personnel. The facility must be in compliance with all permit conditions. Any items not in compliance must be repaired or replaced to design condition prior to the transfer. Records of maintenance activities performed to date will be required. 13. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 14. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. III. GENERAL CONDITIONS This permit is not transferable to any person or entity except after notice to and approval by the Director. In the event there is either a desire for the facilities to change ownership, or there is a name change of the Permittee, a completed "Name/Ownership Change Form" must be submitted to the Division of Water Quality signed by both parties involved, accompanied by the appropriate documentation as listed on page 2 of the form. The project must be in good standing with DWQ. The approval of this request will be considered on its merits and may or may not be approved. 2. The permittee is responsible for compliance with all of the terms and conditions of this permit until such time as the Director approves the transfer request. Neither the sale of the project area in whole or in part, nor the transfer of common area to a third party, constitutes an approved permit transfer. 3. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 4. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction. 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. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. Permittee grants permission to staff of the DWQ to access the property for the purposes of inspecting the stormwater facilities during normal business hours. The permittee shall notify the Division in writing of any name, ownership or mailing address changes at least 30 days prior to making such changes. Page 5 of 8 State Stormwater Management Systems Permit No. SW8 090528 9. 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. Permit issued this the 23rd day of July, 2009. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION r ColeeryjH.Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Page 6 of 8 State Stormwater Management Systems Permit No. SW8 090528 Brunswick Nuclear Plant - Unit 1 Capacitor Bank Installation Page 1 of 2 Stormwater Permit No. SW8 090528 Brunswick 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 are a part of this Certification. Noted deviations from approved plans and specifications: Signature Registration Number Date SEAL Page 7 of 8 State Stormwater Management Systems Permit No. SW8 090528 Certification Requirements: Page 2 of 2 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 sand filter elevations are per the approved plan. 6. The. sand filter is located per the approved plans. 7. A trash rack is provided on the outlet/bypass structure. 8. For open -bottom sand filters, 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 and located per the approved plans. 13. All permitted design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, a forebay, and the vegetated filter. 15. The permitted dimensions of the system are provided, per the approved plan. cc: NCDENR-DWQ Regional Office Brunswick County Building Inspections Page 8 of 8 - d DWQ,USE ONLYJP� Date Received Fee Paid Permit Number 11 Ca -o` ooc - i- (C 1 State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION -FORM This form may be photocopied for use as an original R fig 4 JUN 2 2009 I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): Carolina Power and Light Co. D/B/A Progress Energy Carolinas, Inc. 2.. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Edward L. Wills, Tr. - Plant General Manager 3. Mailing Address for person listed in item 2 above: 8470 River Road SE City:Southport State:NC Zip:28461 Phone: (910 ) 457-3691 Email:ed.wills@12gnmail.com Fax: ( ) 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation 5. Location of Project (street address): City:Southport County:Brunswick Zip:28461 6. Directions to project (from nearest major intersection): Intersection of Highway 87 and 113 South, approximately 3750 FT to entrance of property. 7. Latitude:33° 57 38" N Longitude:78' 00' 39" W of project 8. Contact person who can answer questions about the project: Name:Steve Cahoon Telephone Number: (919 ) 546-7457 Email:steve.cahoon@pgnmail.com II. PERMIT INFORMATION: 1. Specify whether project is (check one): ❑Renewal ❑Modification Form SWU-101 Version 09.25.08 PaV 1 of 4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): ❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ❑NPDES Industrial r' -• ` 7 , Storrnwater JUPi ? 1 2009 III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Forebay to sand filter (BMP) to a level spreader. Flow from the project site will be diverted to the forebay and sand filter and outlet to a level spreader for diffused flow. 2. Stormwater runoff from this project drains to the Cal2e Fear River basin. 3. Total Property Area: 2.03 acres 4. Total Coastal Wetlands Area: 0 acres 5. Total Property Area (3) - Total Coastal Wetlands Area (4) = Total Project Area'*:1.20 acres 6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA)'.Y6 `IS 7. How many drainage areas does the project have?2 8. 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, co m lete the table with one drainage area for each engineered stormwater device. ,Basin Information ;:'.,'; Drainage Area/ ' Drainage Area/ Receiving Stream Name Nancy's Creek C 0] P 0 4 Stream Class & Index No. SC, HQW,UW4f7SW 1 q _gg_ 3 �G a) 54) Total Drainage Area (so 52,272 (see narrative) On -site Drainage Area (sf) 52,272 Off -site Drainage Area (so 0 Existing Impervious* Area (so 0 6 Proposed Impervious*Area (sf) 34,848 sf - includes BMP and forebay 4792 sf - driveway apron from DA E % Impervious* Area (total) 67% '_q a , r Im ervious� Surface Area ;,' Drainage Area 1, I Drainage Area' 2 On -site Buildings (so 0 On -site Streets (so 0 On -site Parking (so 0 On -site Sidewalks (so 0 Other on -site (so 34,848 (includes BMP and forebay) 4792 sf - driveway apron from DA G and DAH Off -site (so 0 MZ; Form SWU-101 Version 09.25.08 Page 2 of 4 Total (so: 34,848 sf (0.80 ac) (combined total (compensatory treatment provided treated in BMP in BMP Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. 'Total project area shall be calculated to exclude Coastal Wetlands from use when calculating the built upon area percentage calculation. This is the area used to calculate overall percent project built upon area (BUA). 9. How was the off -site impervious area listed above derived?N/A Projects in Union County: Contact the DWQ Central Office staff to check to see if you project is located within a Threatened & Endangered Species watershed that may be subject to more stringent,-stormwater requirements. "' 1_ o IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS JUN 2 2009 One of the following property restrictions and protective covenants are required to be e orded=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 hUp://h2o.enr.state.nc.us/su/bml2 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 DRPC4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded property 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 NC DWQ 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 Permitting Unit at (919) 807-6300 for the status and availability of these forms. Forms can be downloaded from htto://h2o.enr.state.nc.us/su/bml2forms.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 Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401-Sand Filter Bioretention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement Sand Filter Supplement Form SWU-101 Version 09.25.08 Page 3 of 4 Form SW401-Permeable Pavement Form SW401-Cistern Permeable Pavement Supplement Cistern Supplement JUN 2 2009 ---7. Form SWU-101 Version 09.25.08 Page 4 of 4 VI. SUBMITTAL REQUIREMENTS JUN .?, 200P 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 httn://h2o.enr.state.nc.us/su/msi mans.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 7�1� • Original and one copy of the Deed Restrictions & Protective Covenants Form (if ti/.4 required as per Part IV above) �/ • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP T VK� • 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 - North arrow - Scale - Revision number & date Mean high water line Dimensioned property/project boundary Location map with named streets or NCSR numbers Original contours, proposed contours, spot elevations, finished floor elevations Details of roads, drainage features, collection systems, and stormwater control measures Wetlands delineated, or a note on plans that none exist Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations Drainage areas delineated Vegetated buffers (where required) VIL AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf (such as additional information requests), please complete this section. (ex. designing engineer or firm) Designated agent (individual or firm): �J A Mailing Address: City: Sta Phone: ( 1 Fax: Email VIII.APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) ju')a v J �. 01 1 (5 q r . 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 .100n. / _ Date: l0 • /.D• C? FormSWU-101 Version09.25.08 Page 5of4 TRANSMISSION VERIFICATION REPORT TIME : 07/24/2009 09:46 NAME : NCDENR FAX : 9103502016 TEL : 9107967215 DATE,TIME 07/24 09:44 FAX NO./NAME 919198819923 DURATION 00:02:38 PAGE(S) 09 RESULT OK MODE STANDARD ECM State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office Beverly Eaves perdue, Governor FAX COVER SHEET Dee Freeman, Secretary Date: �, ^�� No. Pages (excl. cover): g Express Permitting To: From: Sandra Exum Co: w Phone 9(_1—Q),7 6-726� 5 Fax: — Fax: (910) 350-2004 Re f7K Hard Cogy to follow i 127 Cq*dinal Drivc Extension, Wilmington, NC 2")5 a (910) 7%-7215 a An Equal Opportunity Affiro'muve Action Employer TRANSMISSION VERIFICATION REPORT TIME : 07/24/2009 09:51 NAME : NCDENR FAX : 9103502018 TEL : 9107967215 DATE,TIME 07/24 09:48 FAX NO./NAME 94573321 DURATION 00:02:39 PAGE(S) 09 RESULT OK MODE STANDARD ECM state of 1,4or►n a,um Ur -- Department of Environment and 14%tural Resources Wilmington Regional Office .Beverly Eaves perdue, Governor FAX COVER SHEET Date: aTo: Co: Fax: Hard Com to follow Dee Freeman, Secretary No. Pages (e,ccl. cover): Express Permitting From: Sandra Exum Phone LOJ 796-7265 Fax: (91fD_350?004- 127 Cardinai Drivc Extension. Wilmington, NC 29405 • (910) 796-721 5 • An Equal Opportunity AlNrrnative Action Employer `f Nelson, Christine From: Russell, F. Virginia [fvrussell@Dewberry.com] Sent: Wednesday, July 22, 2009 2:53 PM To: Nelson, Christine Cc: Hanson, Michael; steve.cahoon@pgnmail.com Subject: RE: request for additional info: SW Project No. 090528 Unit 1 Capacitor Bank Christine, The spreadsheet in Appendix E on page 7 was not changed because this page shows an approximate volume representation that relies on trends to establish the best fit line for the stage storage volume in the BMP. For this spreadsheet, you must represent a volume below the actual volume available. This volume accumulation is ignored in the routing calculations, page 8. The variables Zi and Zo shown in the blue box on page 8 establish the beginning elevation of the available storage in the BMP. The value here is changed to 22.15. All volumes below this elevation are ignored in routing. If you have any questions please feel free to give me a call. Thanks. Virginia Virginia Russell, El, LEE[®AP Civil Designer Dewberry 2301 Rexwoods Drive Suite 200 Raleigh, NC 27607 919-881,9939 919-881-9923 fax www.dewberrv.com From: Nelson, Christine[mailto:christine.nelson@ncdenr.gov] Sent: Wednesday, July 22, 2009 11:38 AM To: Russell, F. Virginia Subject: RE: request for additional info: SW Project No. 090528 Unit 1 Capacitor Bank Virginia, I do have question for you regarding the additional information submitted for this project. I'm looking that the new sand filter calculations and am a bit confused about one of the pages. In particular, the one I am look at is 716 page of Appendix E. This page includes a table with the incremental contours, surface areas, and volumes. I noticed the contours start at 21.5 with volume of water accumulating at an elevation of 22. Should this table have been updated to reflect the new elevations? Thanks, Christine Christine Nelson State Stormwater Program - Express Permitting NC Division of Water Quality Wilmington Regional Office 910-796-7323 E-mail correspondence to and from this address may he subject to the North Carolina Public Records Law and maybe disclosed to third parries. From: Nelson, Christine Sent: Friday, July 17, 2009 8:38 AM To: 'Russell, F. Virginia' Subject: RE: request for additional info: SW Project No. 090528 Unit 1 Capacitor Bank Great! I will keep an eye out for it. Thanks for the heads up. Christine From: Russell, F. Virginia [mailto:fvrussell@Dewberry.com] Sent: Friday, July 17, 2009 8:08 AM To: Nelson, Christine Cc: Russell, Janet; Jones, III, Reuben; steve.cahoon@pgnmai!.com; marty.mcgowan@pgnmail.com Subject: RE: request for additional info: SW Project No. 090528 Unit 1 Capacitor Bank Christine, We have completed your request for additional information and placed the package in the mail. You should receive it this morning. Please feel free to give me a call should you have any questions. Thanks, Virginia Virginia Russell, El, LEED® AP Civil Designer Dewberry 2301 Rexwoods Drive Suite 200 Raleigh, NC 27607 919-881-9939 919-881-9923 fax www.dewberrv.com From: Nelson, Christine[mailto:christine.nelson@ncdenr.gov] Sent: Friday, July 10, 2009 8:45 AM To: ed.wills@pgnmail.com; steve.cahoon@pgnmail.com; marty.mcgowan@pgnmail.com; Russell, F. Virginia Cc: Russell, Janet Subject: request for additional info: SW Project No. 090528 Unit 1 Capacitor Bank All, I have attached a pdf version of my request for additional information for Stormwater Project S W8 090528 — Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation. I will also send copies via mail. Please let me know if you have any questions. Thank you, Christine Christine Nelson It Dewberry July 16, 2009 Ms. Christine Nelson Environmental Engineer Division of Water Quality Wilmington Regional Office 127 Cardinal Drive Extension Wilmington NC, 28401 2301 Rexwoods Drive 919,891,9939 Suite 200 919,881,9923 fax Raleigh, NC 27607 www.de.lV"Y.0,m 'Art, J U L 17 2009 Reference: Brunswick Nuclear Plant Unit 1 Capacitor Bank Express Review Revisions - Stormwater Application No SW8 090528 Dear Ms. Nelson: Please find the following responses to your "Request for Additional Information' dated July 10, 2009 on the above referenced project: Comment I: The boring locations identified on pan sheet C-2 along with the SI-IWT depths identified in the report from LMG dated January 12, 2009 do not appear to support the SHWT elevation being 2 feet below the bottom of the sediment chamber and the sand filter. It appears that only boring 20 was used to determine the SHWT elevation. However, borings 18 and 19 also coincide with location of the sediment chamber and sand filter and both of these borings appear to have a SHWT separation of less than 2 ft from the proposed bottom elevations. Please verify that a 2 foot separation between the SHWT elevation and the bottom of the sediment chamber and sand filter has been provided. Response: The borings labeled "SHWL" on sheet C-2 were incorrectly labeled. The previously identified locations were boring locations for structural analysis. The actual SHWT, boring locations have been added to sheet C-2 and sheet C-9. The corresponding SHWL has been added to the profile on sheet C-9. The environmental report identifies SHWL at 3 locations (borings 18, 19 and 20). In order to alleviate any concern, we have revised the calculations based on boring #18 which identifies the most conservative SHWL at elevation 18.15'. The elevation previously used was 18.0' as identified by boring #19. Revisions have been made to the project plans to reflect the new elevations. A 2ft separation has been provided below both the bottom of the sediment forebay and the sand filter. Comment 2: Please provide calculations for the level spreaders supporting the information in the supplements, especially for the level spreader associated with drainage area C. Response: Calculations for the permanent level spreaders have been added as Appendix L. Also, level spreader supplement form and sand filter supplement have been revised. Both Appendix L and the revised Appendix D have been provided. Dewberry & Davis, Inc. 2301 Rexwoods Drive 919.881.9939 Suite 200 919.881.9923 fax Dewberry* yv Raleigh, NC 27607 www.Aewlxrry.com n n 1 7 2009 Continent 3: Please include the forebay berm elevation on the plans. According to the weir calculations for the sand filter, it appears that the forebay berm elevation is 23.3 ft. Response: The forebay bean elevation has been added to sheets C-3 and C-9 (23.3'). Comment 4: The sand filter drainage area map appears to include areas to the south-east side of the sand -filter that is not draining to the 13MP. Please verify that the drainage area map is accurate. Response: All areas on the drainage area ntatp drain to Nancy's creek. Area E on sheet C-4 drains to an existing stornnvater drainage piping system and outfalls to the existing ditch on site. Revised drainage area maps C-2 and C-4 have been provided. Comment 5: Please submit a $500 fee for the additional review required for this application. . Response: A check for $500 has been provided. For your review we have enclosed the following: • Appendix D — Revised Level Spreader and Sand Filter Supplement Forms • Appendix E — Revised Sand Filter Calculations • Appendix L— Level Spreader Calculations • 'Three (3) sets of revised project plans (C-2, C-3, C-4, C-6, & C-9) • Additional Review Fee of $500.00 Please feel free to give me a call should you have any questions or need any additional information. Sincerely, Dewberry & Davis, Inc. Virginia Russell, EI, LEEP AP Civil Designer P:A.50017875VAdmVCorrespondenceAla hers\20D9.07.15 - Revised Slormwater Hermit Package Cover Uaer.docx Dewberry & Davis, Inc. _r rf NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Governor Director July 10, 2009 Mr. Edward L. Wills, Jr, Plant General Manager Carolina Power and Light Co. D/B/A Progress Energy Carolinas, Inc. 8470 River Road SE Southport, NC 28461 Subject: Request for Additional Information Stormwater Project No. SW8 090528 Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation Brunswick County Dear Mr. Wills: Dee Freeman Secretary The Wilmington Regional Office received an Express Stormwater Management Permit Application for Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation on June 24, 2009. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: The boring locations identified on plan sheet C-2 along with the SHWT depths identified in the report from LMG dated January 12, 2009 do not appear to support the SHWT elevation being 2 feet below the bottom of the sediment chamber and the sand filter. It appears that only Boring 20 was used to determine the SHWT elevation. However, Borings 18 and 19 also appear to coincide with location of the sediment chamber and sand filter and both of these borings appear to have SHWT separation of less than 2 ft from the proposed bottom elevations. Please verify that a 2 foot separation between the SHWT elevation and the bottom of the sediment chamber and sand filter has been provided. 2. Please provide calculations for the level spreaders supporting the information in the supplements, especially for the level spreader associated with drainage area C. Please include the forebay berm elevation on the plans. According to the weir calculations for the sand filter, it appears that the forebay berm elevation is 23. ft. 4. The sand filter drainage area map appears to include areas to the south-east side of the sand filter that is not draining to the BMP. Please verify that the drainage area map is accurate. 5. Please submit a $500 fee for the additional review required for this application. Please note that this request for additional information is in response to a preliminary review. The requested information should be received in this Office r to July 20, 2009, or the application will be returned as incomplete. The return of, a project will necessitate resubmittal of all required items, including the application fee. Wilmington Regional Office 127 Cardinal Drive Extension, Wilmington, North Carolina 29405 e *TO Phone: 910-796-7215 1 FAX: 910-350-20041 Customer Service: 1-877-623-6748 lv aiolinaa. Internet: www.nmaterquality.org Naturallff An Equal ODponunity 1 Alfumalive Action Employer Mr. Edward L. Wills, Jr. July 10, 2009 Stormwater Application No. SW8 090528 If you need additional time to submit the information, please email or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. Please note that a second significant request for additional information may result in the return of the project. If the project is returned, you will need to reschedule the project through the Express coordinator for the next available review date, and resubmit all of the required items, including the application fee. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please label all packages and cover letters as "Express" and reference the project name and State assigned project number on all correspondence. If you have any questions concerning this matter please feel free to call me at (910) 796-7323 or email me at christine.nelson@ncdenr.gov. Sincerely, jp( C" goaQ Christine Nelson Environmental Engineer GDS/can: S:\WQS\STORMWATERWDDINFO\2009\090528.ju109 cc: Steve Cahoon, Carolina Power and Light Co. D/B/A Progress Energy Carolinas, Inc. Michael Hanson, Dewberry & Davis, Inc. Christine Nelson Wilmington Regional Office Page 2 of 2 Nelson, Christine From: Nelson, Christine Sent: Friday, July 10, 2009 8:45 AM To: 'ed.wills@pgnmail.com'; 'steve.cahoon@pgnmail.com'; 'marty.mcgowan@pgnmail.com'; 'fvrussell@dewberry. com' Cc: Russell, Janet Ti--grinfo`SW Project.No. 090528 Unit-1-Capacitor-Bank quesfoad Attachments: 090U iu109.pdf All, I have attached a pdf version of my request for additional information for Stormwater Project SW8 090528 — Brunswick Nuclear Plant Unit l Capacitor Bank Installation. I will also send copies awes m Please let me know if you have any questions. Thank you, Christine Christine Nelson State Stormwater Program - 8xpress Permitting NC Division of Water Quality Wilmington Regional Office 910-796-7323 Before printing this email, please consider your budget and the environment. If you must print, please print only what you need. E-mail correspondence to and from this address nary be subject to the North Carolina Public Records Law and may be discloser( to third parties. Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation NCDENR — Division of Water Quality Stormwater Management Permit Package June 12, 2009 Prepared For: Progress Energy Carolinas, Inc. 100 East Davis Street TPP 18 Raleigh, NC 27601 Prepared By: Dewberry & Davis, Inc. 2301 Rexwoods Drive Suite 200 Raleigh, NC 27607 Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation NCDENR — Division of Water Quality Stormwater Management Permit Package June 12, 2009 Prepared For: Progress Energy Carolinas, Inc. 100 East Davis Street TPP 18 Raleigh, NC 27601 Prepared By: Dewberry & Davis, Inc. 2301 Rexwoods Drive Suite 200 Raleigh, NC 27607 �J\\� CAROB 30 24 7s' ��Q �O iA T 1 S.%1F1i 1 Table of Contents JU\� 2 200n Stormwater Narrative ProjectDescription.....................................................................................................................I ExistingSite Conditions..............................................................................................................I SoilCharacteristics.....................................................................................................................I Storm water Management............................................................................................................ I Summary of Stormwater Flow Rates....................................................................:.......................2 List of Appendices Appendix A - Express Review Program Stormwater Management Application Form Appendix B - Checklist Appendix C - Inspection and Maintenance Agreements - Sand Filter (Form 1) & Level Spreader (Form 2) Appendix D - Sand Filter (Form 1) & Level Spreader Supplement Forms (Form 2) Appendix E - Sand Filter Calculations Appendix F - Underdrain Calculations Appendix G - Drainage Area Maps Appendix H - USGS Map and Soils Map Appendix I - Subsurface Exploration Report Appendix J - Natural Resource Investigation Report Appendix K - Specifications A?fir a,x L- Le,, -A 5t q,&r JUN 2 � 200 Project Description The project is located at the Brunswick Nuclear Plant, Township of Smithville, Brunswick County, North Carolina. The site is located off Highway 87 northeast of Southport, North Carolina. Progress Energy Carolinas, Inc. (PEC) is going to install two (2) 230kV capacitor banks at the Brunswick Nuclear Plant. The capacitor banks will each require a new circuit breaker, which will be located inside the existing switchyard fence. The Brunswick Nuclear Plant contains 2,920 acres of which a total of 3.13 acres will be disturbed due to the construction activities. The 3.13 acres is divided into two (2) smaller sites, A and B. Site A has a disturbed site area of 2.03 acres and is under review by NCDENR Land Quality for an Erosion and Sedimentation Control Permit. Of the 2.03 acres site area, only 1.20 acres (drainage area) drain to the BMP. The remaining 0.83 acres will primarily be grassed and the stormwater runoff will return to the original flow pattern. Site B has a disturbed area of 1.10 acres. The new construction of this site includes resurfacing of an existing gravel lot. No new impervious surface will be created. The area drains to an existing stormwater treatment facility and therefore does not require a stormwater permit. The area is under review by NCDENR Land Quality for an Erosion and Sediment Control Permit. The Brunswick Nuclear plant is a secure site and to enter the facility you must obtain a pass. We did not supply an easement because the project is on land under one owner and no land sales are proposed. Existing Site Conditions The capacitor site (site A) is partially wooded and partially grass field and brush. The circuit breaker site - (site B) is located on existing gravel and will remain as gravel after construction. The project area is in the Cape Fear River Basin. The majority of the site A (DA-A, C, D and F) discharges to Nancy's Creek. The remaining portion of site A (DA-B and E) discharges to an existing canalAevee system. Site B flows into an existing stormwater treatment facility that discharges to Nancy's Creek. Nancy's Creek is classified as SC, Sw, and HQW. Class SC waters are tidal salt waters protected for secondary recreation, fishing, aquatic life and wildlife. The classification Sw indicates swamp waters, which have low velocities and other natural characteristics that are different from and adjacent streams. The supplemental HQW indicates High Quality Waters, which are waters that are rated as excellent based on biological and physical/chemical characteristics. Soils Characteristics The soils in the area of construction are classified as BrB, Bragg fine sandy loam, 2 to 6 percent slopes according to the Soils map constructed 1967 by Cartographic Division, Soil Conservation Service, USDA, from 1965 aerial photographs. Stormwater Management Only the stormwater runoff from the capacitor bank (site A) of 1.20 acres will be treated via an open sand filter (this area includes the BMP). The post construction treatment area stormwater from the capacitor bank will sheet flow across gravel, into a forebay, over a fixed weir (concrete lip) into an open sand filter. The sand filter will allow water to percolate through filter media to remove pollutants and treat the stormwater. The flow will be collected by an underdrain system at the bottom of the filter media and discharge to a level spreader and then sheet flow to Nancy's Creek and eventually the Cape Fear River. !UN 2 200° The sand filter has been designed as an on-line system. Therefore, the device has been designed to treat — twice the required volume of the 1.5" rainfall event. Further the forebay exceeds the minimum of 20% of the required treatment volume. Twice the required volume of stormwater will be stored in the sand filter and recover within the required 40 hour time period via an underdrain system. The underdrain was sized in accordance with Section 5.7 of the North Carolina Division of Water Quality Best Management Practice manual, latest edition. In addition, the I -year, 24-hour post -construction flow rate will be released at a rate less than pre -construction flow rates. As the design exceeds both treatment volume and attenuation volume for the (site A) capacitor banks of 1.20 acres it also provides compensatory treatment and attenuation for all incidental areas of new impervious cover (such as driveway aprons — 0.1 1 ac). The total 76% impervious (or 39,640 sf impervious area) reported on the application includes all new impervious surfaces. Summary of Stormwater Flow Rates Peak flow calculations (pre -construction and post -construction) going to the open sand filter were calculated using Rational Method. The inflow hydrograph and volumes were calculated using SCS method. The volume of runoff that must be controlled by the sand filter was calculated using Simple Method. Stage -storage -discharge model for the sand filter was developed using Chainsaw routing. All calculation methods are described in Section 3 of the North Carolina Division of Water Quality Best Management Practice manual, latest edition. The pre -construction and post -construction drainage area for the (site A) built upon area of 1.20 acres is considered for attenuation. An open sand filter will be utilized on this site to treat runoff from the site. The pre -constructed flow rate for the 1-year, 24-hour storm event is 1.3 cfs. The post -construction flow rate of 4.8 cfs is reduced to 0.18 cfs by the BMP. The detention storage volume will be recovered via an underdrain system at the bottom of the filter media. The underdrain system will discharge into a junction box. Larger storm events will bypass the sand filter over a weir located along the western perimeter berm. Physical constraints on the site prohibited the provision for an offline sand filter design. In order to abate the concern for overload of the sand filter the system has been designed to provide twice the required storage for treatment. The sand filter will recover the required volume within the allotted time of 40 hours and the forebay meets the minimum design depth of 3 feet and will retain a pool of water below the invert of the weir to the sand filter. L�IIV 17 2009 BY: Appendix E Sand Filter Calculations DEPTH -DURATION -FREQUENCY TABLE LOCATION: Brunswick, North Carolina Source: Intensities and depth taken from NOAA Atlas 14 Vo12, Version2, SOUTHPORT 5 N, NORTH CAROLINA (31-8113) 33.99 N 78.01 W 29 feet Precipitation Frequency Estimates (inches) 0.86 0.4 ARI (years) 5 min 10.00 min 15 min 30 min 60 min 120 min 3 hr 0 0 12 hr 24 hr 1 0.54 0.87 1.09 1.49 1.86 2.22 2.37 2.99 3.5 4.08 2 0.65 1.04 1.3 1.8 2.26 2.71 2.9 3.64 4.27 4.95 5 0.75 1.2 1.52 2.16 2.77 3.41 3.66 4.62 5.46 6.4 10 0.84 1.34 1.69 2A5 3.19 4.03 4.36 5.5 6.54 7.68 25 0.94 1.5 1.9 2.82 3.76 4.87 5.34 6.77 8.1 9.64 50 1.02 1.63 2.07 3.11 4.22 5.6 6.21 7.9 9.51 11.4 100 1.11 1.76 2.23 3.411 4.71 6.381 7.161 9.14 11.06 13.38 1.17 Precipitation Frequency Estimates (inches/ hour) 0 ARI' (years) 5 min 10 min 15 min 30 min 60 min 120 min 3 hr 6 hr 12 hr 24 hr 1 6.48 5.22 4.36 2.98 1.86 1.11 0.79 0.50 0.29 0.17 2 7.80 6.24 5.20 3.60 2.26 1.36 0.97 0.61 0.36 0.21 5 9.00 7.20 6.08 4.32 2.77 1.71 1.22 0.77 0.46 0.27 10 10.08 8.04 6.76 4.90 3.19 2.02 1.45 0.92 0.55 0.32 25 11.28 9.00 7.60 5.64 3.76 2.44 1.78 1.13 0.68 0.40 50 12.24 9.78 8.28 6.22 4.22 2.80 2.07 1.32 0.79 0.48 100 1 13.32 1 10.561 8.92 1 6.82 1 4.70 1 3.19 1 2.39 1 1.52 0.92 0.56 .1111 I 7 2009 Pre-develo ment conditions I Post-develo ment'condillons . *` `N-",? Total Built Upon Area = 2.03 ac Total Project Area = 2.03 an Total Built Upon 0 = 2.1 cts Total Built Upon 0 = 5.7 cfs Drainage Area D includes all of the area draining to the stormwater treatment BMP in the Post -Development condition. All other remaining areas outside of DA D will continue to drain to their pre -development condition locations. Any areas of incidental new impervious area such as driveway aprons will be accounted for by compensatory (additional) volume in the 3111. 1 7 2009 V 1 us 'Assume Tc = minimum tc of 10min given basin size and piped flow nature of runoff Represents the existing condition of areas within Drainage Area D, plus entrance area Drainage Area E. .11 =I 5.22 in/hr Q,= 1 1.3 cfs 110= 8.04 in/hr 410= 1 1.9 cfs +150 9.78 in/hr IQ50= 1 2.3 cfs +1100= I 10.56 in/hr Q,nn= 1 2.5 cfs + Intensities taken from NOAA Atlas 14 Vo12, Version2, SOUTHPORT 5 N, NORTH CAROLINA (31-8113) 33.99 N 78.01 W 29 feet Post -development rondifions . 1 - -� - Composite C: 0.77 Total Area 1.20 ac Com osite CN 85.7 Tc 5 min 1.6 5 rt 1.71 1.71 1.7 1.7 Q' (in) 1.6 3.9 6.21 7.4 V (ft) 7,0961 16,995126,9861 32,232 tp (min) 1 17.61 27.41 35.81 39.6 Precipitation values are for the 6hr storm. Malcolm recommends the 6hr storm event for approximation of the volume of runoff '11= I 5.22 in/hr 101= 4.8 cfs '110= I 8.04 in/hr 101o= 1 7.4 cfs *150= 1 9.78 in/hr 1050= 1 9.0 cfs '1100= I 10.56 in/hr 101nn= I 9.8 cfs Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation Drainage Area D only BMP Design for 85%TSS Removal Estimated Storage Required (I yr24hr) 3,777 5 0.09 acre-ft e/ impervious 67% Ad (Drainage Area (ac)) Rv runoff coeft 1.20 ac 0.65 Rd (design storm) 3.0 in WQV (1.5" required, used 3") 8,494 cf 0.20 acre-ft WQVaai (1.5' required, used 3") 6,371 cf 0.1E acre-ft 7Y: 1 7 200E Designed at 2x treatment vol umee on-li-line Designed at 2x treatment volume on-line Designed a1 2x treatment volume on-line Determine available dimensions of sand filter based on site constraints Available width for sand filter 30 ft Available length for sand filter 150 ft Available area for sand filter 4,500 sf (top of sand) Available area for forebay 2,250 0.4 Calaculate hmex rile, based on available area As 2,250 sf forebay At 4,500 sf filter bed hMax Filter 1.300 ft Designed at 2x treatment volume on-line hA 0.65 ft `----------------- --- Check to see if minimum surface area for sedimentation basin and sand filter bed is obtained Depth of sand filter bed (dl) 2.0 If 1.5 it required minimum A. (min required) 562 sf AI (min required) 1,103 sf Note: The total design treatment volume is i Minimum surface area for sedimentation basin is attained provided over sand filter area. Volume (Minimum surface area for sand filter bed is attained contained over sand filter and below weir _ ___-------------------- crest is 7068 cf. Ensure Water Duality Volume is contained (As+AI)*(hmax lilmr) > W OVadi (Ae+AI)'(hmax rite,) 8,775 fDesigned at 2x treatment volume on-line WQVadi 6,371 Water Quality Volume is contained —11 RECF1TVEID JUL I 9 2009 Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation Lrainage Area D only Ly. __ Calculate the required weir size to convey flow to sand chamber Use weir equation Q=CLH312 Q = 4.8 cfs (Use the 1-yr,24-hr post development) C= weir coeff 3.0 H = average head 0.1 ft Required Weir L= 6.37 ft Crest elevation = 23.3 ft NGVD Determine the size of weirs required to obtain the required length Length of weir provided = 150 ft Max Velocity= 0.003 fps < 1fps, therfore acceptable for entry to sand filter Exceeds minimum length "Conservative check for max flow_ J Brunswick Nuclear Plant Unit 1 Drainage / Bank fill_ 1 7 2009 S CHECK CHECK Contour Area Incr Vol Accum Z Contour (ft2) (ft3) Vol (ft3) Stage (ft) In(S) In(Z) Z est SA 21.5 6,700.00 0 0 0 22 7,776.00 3619 3,619 0.5 8.19 -0.69 0.53 8,093 22.5 8,865.00 4160 7,779 1 8.96 0.00 1.00 9,238 23 9,990.00 4714 12,493 1.5 9.43 0.41 1.49 9,982 23.3 10,682.00 3101 15,594 1.8 9.65 0.59 1.80 10,336 23.5 11,396.00 2208 17,802 2 9.79 0.69 2.01 10,546 (Note: Volumes above include Forebay and Sand Filter for routing purposes) WQV (1.5) required 8,494 ft3 Designed at 2x treatment volume on-line Elevation for WQV 23.08 Estimate Vol for lyr24hr Attentuation 3,777 ft3 Elevation for Attenuation Volume 22.55 xcoeff 1.1910 b = 1.19 y-intercept 8.9563 Ks = 7757 9.90 9.80 1 191z+8'9563tim 9.70 9.60' 9.50 t t 9.40, + xd,a t �p `r t ll sP x 9.30 t 9.20 s Y wv 9.10 9.00 p. 8.90 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 • Seriest-Linear(Seriesl) Brunswick Nuclear Plant Unit I Capurimr Bank Installation Drainage Area D ondy_ I yr-Shan, Besnlls Norm srat'ne.= N/A ac flax surf area= 0.21 ac Required SA = N/A ac Peak stago- 22.99 it I'CA ontllow= 0.2 cfs Biac= 0,84 fi Pre-Develapincnl freeboard Ilow' 1.3cf, (max ,nags) ID ft In mts Stage Storage Rydmgraph Inputs Ks= 7757 op. 4.8 cis b. lAg Tp= 17.6 min Zo- 22.15 CrT= I min Initial Water Level. Zi. 22.15 n llutnow Devices Biscr/Barrel Spillway RECF�V�JD 7 2009 BY:- --- W V Drawdawa WOVRequired = 6.371 of WOV Provided = 17,802 of Time Step begin drawdown= 74 minutes Time Step end drawdown for required WOV. 652 minutes Drawdown lime= 9.6 hours Designed at 2x treatment volume on-line N. 0 Number of Risers Orifice NI Driser= 0 in Riser Diameter N. 0 Cw= 3.30 Riser Weir Coen D. 0 in Cd- 0.6 Riser Orifice Coen Cd- 0.6 Zcm 23.3 it Riser Crest Elev Inv. 20 n Db= 0 in Barrel Diameter Cd= 0.6 Barrel orifice coen Underdone Zinv= 20.0 n Elev invert barrel N. 2 D. din Emergenry Weir: O. 0. 182 cis assumes constant head C) el 22.15 L- 5 it Ise- 22.15 It (lap of sand) Zcr= 23.4 It Cw= 2.5 rock_ Tup or Dam Underdrain I n N= 2 Zcr= 3L0 It D= 4 Cw= 2.%grass _ �O= 0.182 eta Riser Riser Emergency 3ime Innow Slomge Surge 0u1now (Drifter) (11•eir) Durrel NBspwy Orificelll Underdrain Weir Top at Dran (min) (crs) na I) (11) (efp (cry) (crs) (era) (crs) (efs) (ers) (crs) (crs) 0 0 0.00E+00 22.15 0.00 OA 0.0 0.000 0.0 0.00 0.00 0.0 0.0 1 0 0.00E+00 22.15 0.00 0.0 0.0 0.000 0.0 0.00 0.00 0.0 0.0 2 0 2.29E+00 22.15 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 3 0 4.47E-01 22.15 0J8 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 4 1 9.70E+00 22.15 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 5 1 3.40E+01 22.16 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 6 1 7.68E+01 22.17 0.18 0.0 0.0 0.000 0.0 0.00 0A8 0.0 0.0 7 2 1.41E+02 22.18 0.18 0.0 0.0 0.000 0.0 0.00 OA8 0.0 0.0 8 2 2.29E+02 22.20 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 9 2 3.42E02 22.22 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 10 3 4.80E+02 22.25 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 11 3 6.44Ev02 22.27 OA8 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 12 4 8.33E+02 22.30 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 13 4 1.04E+03 22.34 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 14 4 1.28E+03 22.37 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 15 5 1.53E+03 22.41 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 16 5 1.79E+03 22.44 0.18 0.0 0.0 0.000 0.0 0.00 OA8 0.0 0.0 17 5 2.06E+03 22.48 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 18 5 2.34E+03 22.52 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 19 5 2.62E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 20 5 2.89E+03 22.59 DAB 0.0 0.0 0.000 0.0 OM 0.18 0.0 0.0 21 4 3.16E+03 22.62 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 22 4 3.41 E+03 22.65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 23 4 3.65E+03 22.68 0.18 0.0 00 0.000 0.0 0.00 0.18 0.0 0.0 24 4 3.87E+03 22.71 0.1B 0.0 U 0.000 0.0 0.00 0A8 0.0 0.0 25 3 4.07E+03 22.73 0.18 0.0 0.0 0.000 0.0 0.00 0.16 0.0 0.0 26 3 4.26E+03 22.75 0.18 M M 0.000 0.0 0.00 0.18 0.0 0.0 27 3 4.43E+03 22.77 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 28 3 4.59E+03 22.79 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 29 2 4.74E+03 22.81 0.10 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 30 2 4.88E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 31 2 5.00E+03 22.84 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 32 2 5.12E+03 22.86 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 33 2 5.23E+03 22.87 0.18 0.0 0.0 0.000 0+0 0.00 0.18 0.0 OD 34 2 5.33E+03 22.88 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 35 2 5.42E+03 22.89 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0+0 1 yr 24hr Storm - Sand Filter Division Truck Company and MP Company Interim Facilities Page 1 of 10 REC EIVED it it 17 2009 BY: Riser Riser F.mergerc� 'Time Inflow Storage Sorge ownnw (Ori0ce) (Weir) Barrel Rispwy Orifice#1 UnderAmin Weir Top nr In (min) (efs) (en R) (I) (efM) (crs) (era') (ers) (efs) (efs) (crs) (,A) 1crs1 36 1 5.50E+03 22.90 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 37 1 5.58E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 38 1 5.65E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 39 1 5.72E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 40 1 5.78E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 41 1 5.83E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 42 1 5.88E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 43 1 5.93E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 44 1 5.97E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 45 1 6.01 E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 46 1 6.04E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 47 1 6.07E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 48 1 6.10E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 49 1 6.13E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 50 1 6.15E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 51 0 6.17E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 52 0 6.19E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 53 0 6.20E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 54 0 6.22E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 55 0 6.23E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 56 0 6.24E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 57 0 6.25E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 58 0 6.26E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 59 0 6.27E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 60 0 6.27E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 61 0 6.27E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 62 0 6.28E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 63 0 6.28E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 64 0 6.28E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 65 0 6.28E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 66 0 6.28E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 67 0 6.28E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 68 0 6.28E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 69 0 6.27E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 70 0 6.27E+03 22.99 0.16 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 71 0 6.27E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 72 0 6.26E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 73 0 6.26E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 74 0 6.25E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 75 0 6.25E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 76 0 6.24E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 77 0 6.24E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 78 0 6.23E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 79 0 6.22E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 80 0 6.22E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 81 0 6.21E+03 22.98 0.18 0.0 0.0 Omit 0.0 0.00 0.18 0.0 0.0 82 0 6.20E+03 22.98 0.18 0.0 0.0 0000 0.0 0.00 0.18 0.0 0.0 83 0 6.19E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 84 0 6.18E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 85 0 6.18E+03 22.98 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 86 0 6.17E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 87 0 6.16E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 88 0 6.15E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 89 0 6.14E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 90 0 6.13E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 91 0 6.12E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 92 0 6.11 E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 93 0 6.10E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 94 0 6.09En03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 95 0 6.08E+03 22.97 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 96 0 6.07E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 97 0 6.06E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 98 0 6.05E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 99 0 6.04E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 100 0 6.03E+03 22.96 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 101 0 6.02E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 102 0 6.01 E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 103 0 6.00E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 104 0 5.99E+03 22.96 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 105 0 5.98E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 106 0 5.97E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 107 0 5.96E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 108 0 5.95E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 109 0 5.94E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 110 0 5.93E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 111 0 5.92E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 1 yr 24hr Storm - SaW Filler Division Track Company and MP Company Interim Facilities Page 2 of 10 1�Crx lul. 7 7 2009 BY: Riser Riser Emergency Time Inflow Storage Stage Outnow (Orifice) (Weir) Barrel RBxpwy Orificetll Underdrain Weir Toy or Uam Orrin) Ids) Iru RI (f) (erx) (ers) (ers) (ers) (efs) (e&) (ers) lets) (crp) 112 0 5.91 E+03 22.95 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 113 0 5.90E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 114 0 5.89E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 115 0 5.88E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 116 0 5.87E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 117 0 5.86E+03 22.94 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 118 0 5.84E+03 22.94 0.18 0.0 0.0 0.000 0.0 MO 0.18 0.0 0.0 119 0 5.83E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 120 0 5.82E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 121 0 5.81 E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 122 0 5.80E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 123 0 5.79E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 124 0 5.78E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 125 0 5.77E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 126 0 5.76E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 127 0 575E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 128 0 5.74E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 129 0 5.73E+03 22.93 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 130 0 5.72E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 131 0 5.70E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 132 0 5.69E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 133 0 5.68E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 134 0 5.67E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 135 0 5.66E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 136 0 5.65E+03 22.92 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 137 0 5.64E+03 22.92 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 138 0 5.63E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 139 0 5.62E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 140 0 5.61 E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 141 0 660E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 142 0 5.58E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.48 0.0 0.0 143 0 5.57E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 144 0 5.56E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 145 0 5.55E+03 22.91 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 146 0 5.54E+03 22.90 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 147 0 5.53E+03 22.90 0.18 0.0 0.0 0.000 0,0 0.00 0.18 0.0 0.0 148 0 5.52E+03 22.90 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 149 0 5.51 E+03 22.90 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 150 0 5.50E+03 22.90 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 151 0 5.49E+03 22.90 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 152 0 5.48E+03 22.90 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 153 0 5.46E+03 22.90 0.18 0.0 0.0 0.000 0.0 MO 0.18 0.0 0.0 154 0 5.45E+03 22.89 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 155 0 5.44E+03 22.89 0.18 0.0 0.0 0.000 0.0 MO 0.18 0.0 0.0 156 0 5.43E+03 22.89 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 157 0 5.42E+03 22.89 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 158 0 5.41 E+03 22.89 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 159 0 5.40E+03 22.89 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 160 0 5.39E+03 22.89 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 161 0 5.38E+03 22.89 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 162 0 5.37E+03 22.88 0.18 0.0 0.0 0.000 0.0 OM 0.18 0.0 0.0 163 0 5.36E+03 22.88 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 164 0 5.34E+03 22.88 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 165 0 5.33E+03 22.88 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 166 0 5.32E+03 22.88 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 167 0 5.31 E+03 22.88 0.18 0.0 0.0 0.000 0.0 OM 0.18 0.0 0.0 168 0 5.30E+03 22.88 0.18 0.0 0.0 0.000 0.0 0.00 Ulf 0.0 0.0 169 0 5.29E+03 22.88 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 170 0 5.28E+03 22.87 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 171 0 5.27E+03 22.87 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 172 0 5.26E+03 22.87 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 173 0 5.25E+03 22.87 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 174 0 5.24E+03 22.87 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 175 0 5.22E+03 22.87 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 176 0 5.21 E+03 22.87 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 177 0 5.20E+03 22.87 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 178 0 5.19Ef03 22.86 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 00 179 0 5.18E+03 22.86 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 180 0 5.17E+03 22.86 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 181 0 5.16E+03 22.86 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 182 0 5.15E+03 22.86 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 183 0 5.14E+03 22.86 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 00 184 0 5.13E+03 22.86 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 185 0 5.12E+03 22.85 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 186 O 5.10E+03 22.85 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 187 0 5.09E+03 22.85 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 1 yr 24hr Storm - Sand Filter Division Truck Company and MP Company Interim Facilities Page 3 of 10 �2lECEI V EID n II- 17 2009 BY: Riser Riser F,nkrgrncy 'I loe woO Swim, SWgc Ou18ox (Orifice) (Weir) Barrel Rliepxy Orifirepl UMerrlruin WOr Top of Dam (min) (efs) Ica B) (R) IcL) (efs) (rfs) (rff) (ers) (crs) WO (efd) (rrs) 188 0 5.08E+03 22.85 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 189 0 5.07E+03 22.85 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 190 0 5.06E+03 22.85 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 191 0 5.05E+03 22.85 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 192 0 5.04E+03 22.85 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 193 0 5.03E+03 22.84 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 194 0 5.02E+03 22.84 0+18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 195 0 5.01 E+03 22.84 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 196 0 4.99E+03 22.84 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 197 0 4.98E+03 22.84 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 198 0 4.97E+03 22.84 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 199 0 4.96E+03 22.84 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 200 0 4.95E+03 22.84 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 201 0 4.94E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 202 0 4.93E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 203 0 4.92E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 204 0 4.91 E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 205 0 4.90E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 206 0 4.89E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 207 0 4.87E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 208 0 4.86E+03 22.83 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 209 0 4.85E+03 22.82 0.18 0.0 0.0 0,000 0.0 0.00 0.18 0.0 0.0 210 0 4.84E+03 22.82 0.18 0.0 0.0 0000 0.0 0.00 0.18 0.0 0.0 211 0 4.83E+03 22.82 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 212 0 4.82E+03 22.82 0.18 0.0 0.0 0.000 0.0 0.00 0.16 0.0 0.0 213 0 4.81 E+03 22.82 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 214 0 4.80E+03 22.82 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 215 0 4.79E+03 22.82 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 216 0 4.78E+03 22.82 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 217 0 4.77E+03 22.81 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 218 0 4.75E+03 22.81 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 219 0 4.74E+03 22.81 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 220 0 473E+03 22.81 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 221 0 4.72E+03 22.81 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 222 0 4.71 E+03 22.81 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 223 0 4.70E+03 22.81 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 224 0 4.69E+03 22.81 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 225 0 4.68E+03 22.80 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 226 0 4.67E+03 22.80 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 227 0 4.66E+03 22.80 0.18 0.0 0.0 MOO 0.0 0.00 0.18 0.0 0.0 228 0 4.64E+03 22.80 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 229 0 4.63E+03 22.80 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 230 0 4.62E+03 22.80 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 231 0 4.61E+03 22.80 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 232 0 4.60E+03 22.79 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 233 0 4.59E+03 22.79 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 234 0 4.58E+03 22.79 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 235 0 4.57EE 03 22.79 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 236 0 4.56E+03 22.79 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 237 0 4.55E+03 22.79 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 238 0 4.54E+03 22.79 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 239 0 4.52E+03 22.79 0.18 0.0 0.0 0.000 0,0 0.00 0.18 0.0 0.0 240 0 4.51 E+03 22.78 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 241 0 4.50E+03 22.78 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 242 0 4.49E+03 22.78 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 243 0 4.48E+03 22.78 0.18 0.0 0.0 0.000 0.0 0.00 0.16 0.0 0.0 244 0 4.47E+03 22.78 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 245 0 4.46E+03 22.78 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 246 0 4.45E+03 22.78 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 247 0 4.44E+03 22.78 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 248 0 4.43E+03 22.77 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 249 0 4.42E+03 22.77 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 250 0 4.40E+03 22.77 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 251 0 4.39E+03 22.77 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 252 0 4.38Et03 22.77 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 253 0 4.37E+03 22.77 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 254 0 4.36E+03 22.77 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 255 0 4.35E+03 22.77 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 256 0 4.34E+03 22.76 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 257 0 4.33E+03 22.76 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 258 0 4.32E+03 22.76 0.18 0.0 0.0 0000 Oe 0.00 0.18 0.0 0.0 259 0 4.31 E+03 22.76 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 260 0 4.29E+03 22.76 0.18 0.0 0.0 O.000 0.0 0.00 0.18 0.0 0.0 261 0 4.28E+03 22.76 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 262 0 4.27E+03 22.76 0.18 0.0 0.0 0000 0.0 0.00 0.18 0.0 0.0 263 0 4.26E+03 22.75 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 1yr 24hr Storm - Send Filler Division Truck Company and MP Company Interim Facilities Page 4 of 10 JR�C�ry .r 17 2009 Riser Riser �-"Y: limer�;erny Tinte Ingo Storage Stage (Imnnw (Orifice) Oveir) Barrel RBspay Orifice Nl Underdrain Weir Tap of Dam (min) (efs) fro B) (B) (efs) (era) (efs) (efs) (cf.,) (crs) (rrs) (crv) icrs) 264 0 4.25E+03 22.75 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 265 0 4.24E+03 22.75 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 266 0 0.23E+03 22.75 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 267 0 4.22E+03 22.75 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 268 0 4.21 E+03 22.75 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 269 0 4.20E+03 22.75 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 270 0 4.19E+03 22.75 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 271 0 4.17E+03 22.74 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 272 0 4.16E+03 22.74 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 273 0 4.15E+03 22.74 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 274 0 4.14E+03 22.74 0.18 0.0 00 0.000 00 0.00 0.18 0.0 0.0 275 0 4.13E+03 22.74 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 276 0 4.12E+03 22.74 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 277 0 4.11 E+03 22.74 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 278 0 4.10E+03 22.74 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 279 0 4.09E+03 22.73 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 280 0 4.08E+03 22.73 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 281 0 4.07E+03 22.73 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 282 0 4.05E+03 22.73 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 283 0 4.04E+03 22.73 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 284 0 4.03E+03 22.73 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 285 0 4.02E+03 22.73 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 286 0 4.01 E+03 22.72 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 287 0 4.00E+03 22.72 0.18 0.0 -0.0 0.000 0.0 0.00 0.18 0.0 0.0 288 0 3.99E+03 22.72 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 289 0 3.98E+03 22.72 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 290 0 3.97E+03 22.72 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 291 0 3.96E+03 22.72 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 292 0 3.94E+03 22.72 0.18 0.0 0.0 0000 0.0 0.00 0.18 0.0 0.0 293 0 3.93E+03 22.72 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 294 0 3.92E+03 22.71 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 295 0 3.91E+03 22.71 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 296 0 3.90E+03 22.71 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 297 0 3.89E+03 22.71 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 298 0 3.88E+03 22.71 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 299 0 3.87E+03 22.71 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 300 0 3.86E+03 22.71 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 301 0 3.85E+03 22.70 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 302 0 3.84E+03 22.70 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 303 0 3.82E+03 22.70 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 304 0 MI E+03 22.70 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 305 0 3.80E+03 22.70 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 306 0 3.79E+03 22.70 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 307 0 3.78E+03 22.70 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 308 0 3.77E+03 22.70 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 309 0 3.76E+03 22.69 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 310 0 3.75E+03 22.69 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 311 0 3.74E+03 2269 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 312 0 3.73E+03 22.69 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 313 0 3.72E+03 22.69 0.18 0.0 0.0 0.000 0.0 0.00 0.18 00 0.0 314 0 3.70E+03 22.69 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 315 0 3.69E+03 22.69 0.18 0.0 0.0 0.000 0.0 0.00 0.18 00 0.0 316 0 3.68E+03 22.68 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 317 0 3.67E+03 22.68 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 318 0 3.66E+03 22.68 0.18 00 0.0 0.000 0.0 0.00 0.18 0.0 0.0 319 0 3.65E+03 22.68 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 320 0 3.64E+03 22.68 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 321 0 3.63E+03 22.68 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 322 0 3.62E+03 22.68 0.18 0.0 0.0 0.000 0.0 0.00 0.1B 0.0 0.0 323 0 3.61 E+03 22.68 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 324 0 3.59E+03 22.67 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 325 0 3.58E+03 22.67 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 326 0 3.57E+03 22.67 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 327 0 3.56E+03 22.67 0.18 0.0 0.0 0.000 0.0 0.00 0.1B 0.0 0.0 328 0 3.55E+03 22.67 0.18 0.0 0.0 0.000 0.0 0.00 0.18 00 0.0 329 0 3.54E+03 22.67 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 330 0 3.53E+03 22.67 0.18 00 0.0 0.000 0.0 0.00 0.18 0.0 0.0 331 0 3.52E+03 22.66 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 332 0 3.51 E,03 22.66 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 333 0 3.50E+03 22.66 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 334 0 3.49E+03 22.66 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 335 0 3.47E+03 22.66 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 336 0 3.46E+03 22.66 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 337 0 3.45E+03 22.66 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 338 0 3.44E+03 22.66 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 339 0 3.43E+03 22.65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 1yr 24hr Storm - Sand Filler Division Truck Company and MP Company Interim Facilities Page 5 of 10 RECEIVED .nil. 17 2009 BY: Riser Riser Rmergeney 'rime 1nnow $Image swge O.tOnw (lririce) (Wei,) Barrel Rltsp%y Oritiaepl Underdram Weir Top nr Dam (min) (crsl (can) (R) (crs) (crq (c&) Icrs) (cfs) (crs) 1e6) (crs) (crs) 340 0 3.42E+03 22.65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 341 0 3.41 E+03 22 65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0 0 342 0 3.40E+03 22.65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 343 0 3.39E+03 22.65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 3" 0 3.38E+03 22.65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 345 0 3.37E+03 22.65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 346 0 3.35E+03 22.64 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 347 0 3.34E+03 22.64 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 348 0 3.33E+03 22.64 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 349 0 3.32E+03 22.64 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 350 0 3.31 E+03 22.64 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 351 0 3.30E+03 22.64 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 352 0 3.29E+03 22.64 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 353 0 3.28E+03 22.64 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 354 0 3.27E+03 22.63 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 355 0 3.26E+03 22.63 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 356 0 3.24E+03 22.63 0.18 0.0 00 0D00 0.0 0.00 0.18 0.0 0.0 357 0 3.23E+03 22.63 0.18 0.0 0.0 0000 0.0 0.00 0.18 0.0 0.0 358 0 3.22E+03 22.63 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 359 0 3.21 E+03 22.63 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 360 0 3.20E+03 22.63 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 361 0 3.19E+03 22.62 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 362 0 3.18E+03 22.62 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 363 0 3.17E+03 22.62 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 364 0 3.16E+03 22.62 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 365 0 3.15E+03 22.62 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 366 0 3.14E+03 22.62 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 367 0 3.12E+03 22.62 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 368 0 3.11 E+03 22.61 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 369 0 3.10E+03 22.61 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 370 0 3.09E+03 22.61 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 371 0 3.08E+03 22.61 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 372 0 3.07E+03 22.61 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 373 0 3.06E+03 22.61 0.18 0.0 0.0 0000 0.0 0.00 0.18 0.0 0.0 374 0 3.05E+03 22.61 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 375 0 3.04E+03 22.61 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 376 0 3.03E+03 22.60 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 377 0 3.02E+03 22.60 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 378 0 3.00E+03 22.60 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 379 0 2.99E+03 22.60 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 380 0 2.98E+03 22.60 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 381 0 2.97E+03 22.60 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 382 0 2.96E+03 22.60 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 383 0 2.95E+03 22.59 0.18 0.0 0.0 0.000 0.0 000 0.18 0.0 0.0 384 0 2.94E+03 22.59 0.18 0.0 0.0 0.000 0.0 000 0.lB 0.0 0.0 385 0 2.93E+03 22.59 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 386 0 2.92E+03 22.59 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 387 0 2.91E+03 22.59 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 388 0 2.89E+03 22.59 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 389 0 2.88E+03 22.59 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 390 0 2.87E+03 22.58 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 391 0 2.86E+03 22.58 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 392 0 2.85E+03 22.58 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 393 0 2.84E+03 22.58 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 394 0 2.83E+03 22.58 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 395 0 2.82E+03 22.58 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 396 0 2.81 E+03 22.58 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 397 0 2.80E+03 22.57 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 398 0 2.79E+03 22.57 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 399 0 2.77E+03 22.57 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 400 0 2.76E+03 22.57 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 401 0 2.75E+03 22.57 0.18 0.0 0.0 0.000 0.0 0.00 0.18 00 0.0 402 0 274E+03 22-57 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 00 403 0 2.73E+03 22.57 0.18. 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 404 0 2.72E+03 22.56 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 405 0 2.71E+03 22.56 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 406 0 2.70E+03 22.56 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 407 0 2.69E+03 22.56 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 408 0 2.68E+03 22.56 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 409 0 2.67E+03 22.56 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 410 0 2.65E+03 22.56 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 411 0 2.64E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 412 0 2.63E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 413 0 2.62E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 414 0 2.61 E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 415 0 2.60E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 1yr 24hr Storm - Sand Filter Division Truck Company and MP Company Interim Facilities Page 6 or 10 n u i 7 INS BY: -_---- Ri,er Rimr Rmnrgermy 'Rnx Innon Stnragc Stage Dutnow (Oririce) (Weir) Ilarrol Rllspny Ilrificakl Undendrain Weir '1'oporl)uni muro (.rs) (cn n) (n) Ids) (rr,) (,R) ar,) (Cr,) (rrs) (rrs) n,k) (t,R) 416 0 2.59E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 417 0 2.58E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 418 0 2.57E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 419 0 2.56E+03 22.54 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 420 0 2.54E+03 22.54 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 421 0 2.53E+03 22.54 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 422 0 2.52E+03 22.54 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 423 0 2.51 E+03 22.54 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 424 0 2.50E+03 22.54 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 425 0 2.49E+03 22.54 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 426 0 2.48E+03 22.53 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 427 0 2.47E+03 22.53 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 428 0 2.46E+03 22.53 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 429 0 2.45E+03 22.53 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 430 0 2.44E+03 22.53 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 431 0 2.42E+03 22.53 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 432 0 2.41 E+03 22.53 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 433 0 2.40E+03 22.52 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 434 0 2.39E+03 22.52 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 435 0 2.38E+03 22.52 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 436 0 2.37E+03 22.52 0.18 00 0.0 0.000 0.0 0.00 0.18 0.0 0.0 437 0 2.36E+03 22.52 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 438 0 2.35E+03 22.52 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 439 0 2.34E+03 22.52 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 440 0 2.33E+03 22.51 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 441 0 2.32E+03 22.51 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 442 0 2.30E+03 22.51 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 443 0 2.29E+03 22.51 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 444 0 2.28E+03 22.51 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 445 0 2.27E+03 22.51 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 446 0 2.26E+03 22.51 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 447 0 2.25E+03 22.50 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 448 0 2.24E+03 22.50 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 449 0 2.23E+03 22.50 0.18 00 0.0 0.000 0.0 0.00 0.18 0.0 0.0 450 0 2.22E+03 22.50 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 451 0 2.21 E+03 22.50 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 452 0 2.19E+03 22.50 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 453 0 2.18E+03 22.50 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 454 0 2.17E+03 22.49 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 455 0 2.16E+03 22.49 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 456 0 2.15E+03 22.49 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 457 0 2.14E+03 22.49 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 458 0 2.13E+03 22.49 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 459 0 2.12E+03 22.49 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 460 0 2.11E+03 22.48 0.18 0.0 0.0 0000 0.0 0.00 0.18 0.0 0.0 461 0 2.10E+03 22.48 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 462 0 2.09E+03 22.48 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 463 0 2.07E+03 22.48 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 464 0 2.06E+03 22.48 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 465 0 2.05E+03 22.48 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 466 0 2.04E+03 22.48 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 467 0 2.03E+03 22.47 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 468 0 2.02E+03 22.47 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 469 0 2.01 E+03 22.47 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 470 0 2.00E+03 22.47 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 471 0 1.99E+03 22.47 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 472 0 1.98E+03 22.47 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 473 0 1.97E+03 22.47 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 474 0 1.95E+03 22.46 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 475 0 1.94E+03 22.46 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 476 0 1.93E+03 22.46 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 477 0 1.92E+03 22.46 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 478 0 1.91 E+03 22.46 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 479 0 1.90E+03 22.46 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 460 0 1.89E+03 22.46 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 481 0 1.88E+03 22.45 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 482 0 1.87E+03 22.45 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 483 0 1.86E+03 22.45 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 484 0 1.84E+03 22.45 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 485 0 1.83E f03 22.45 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 486 0 1.82E+03 22.45 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 487 0 1.81 E+03 22.44 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 488 0 1.80E+03 22.44 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 489 0 1.79E+03 22.44 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 490 0 1.78E+03 22.44 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 491 0 1.77E+03 22.44 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 1yr 24hr Storm - Sand Filter Division Truck Company and MP Company Interim Facilities Page 7 of 10 --C-- v-EID72009Nicer :b1.!trQVdmIn� Nicer ___IirneInflow Storage Stage Ouirew mrifi3O Mori Named N16pwy Ori Weir Top of,)am Unin) (ers) (m N) 101 (dr) (rh) (ers) (crs) (ers) (efs) (crs) (efs) (cr.,) 492 0 1.76E+03 22.44 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 493 0 1.75E+03 22.44 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 494 0 1.74E+03 22.43 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 495 0 1.72E+03 22.43 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 496 0 1.71 E+03 22.43 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 497 0 1.70E+03 22.43 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 498 0 1.69E+03 22.43 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 499 0 1.68E+03 22.43 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 500 0 1.67E+03 22.43 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 501 0 1.66E+03 22.42 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 502 0 1.65E+03 22.42 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 503 0 1.64E+03 22.42 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 504 0 1.63E+03 22.42 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 505 0 1.62E+03 22.42 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 506 0 1.60E+03 22.42 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 507 0 1.59E+03 22.41 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 508 0 1.58E+03 22.41 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 509 0 1.57E+03 22.41 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 510 0 1.56E+03 22.41 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 511 0 1.55E+03 22.41 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 512 0 1.54E+03 22.41 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 513 0 1.53E+03 22.41 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 514 0 1.52E+03 22.40 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 515 0 1.51 E+03 22.40 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 516 0 1.49E+03 22.40 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 517 0 1.48E+03 22.40 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 518 0 1.47E+03 22.40 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 519 0 1.46E+03 22.40 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 520 0 1.45E+03 22.39 0.18 00 0.0 0.000 0.0 0.00 0.18 0.0 0.0 521 0 1.44E+03 22.39 O.IB 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 522 0 1.43E+03 22.39 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 523 0 1.42E+03 22.39 0.18 00 0.0 0.000 0.0 0.00 0.18 0.0 0.0 524 0 1.41E+03 22.39 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 525 0 1.40E+03 22.39 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 526 0 1.39E+03 22.39 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 527 0 1.37E+03 22.38 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 528 0 1.36E+03 22.38 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 529 0 1.35E+03 22.38 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 530 0 1.34E+03 22.38 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 531 0 1.33E+03 22.38 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 532 0 1.32E+03 22.38 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 533 0 1.31E+03 22.37 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 534 0 1.30E+03 22.37 0.18 00 0.0 0.000 0.0 0.00 0.18 DO 0.0 535 0 1.29E+03 22.37 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 536 0 1.28E+03 22.37 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 537 0 1.27E+03 22.37 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 538 0 1.25E+03 22.37 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 539 0 1.24E+03 22.36 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 540 0 1.23E+03 22.36 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 541 0 1.22E+03 22.36 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0,0 542 0 1.21E+03 22.36 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 543 0 L20E+03 22.36 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 544 0 1.19E+03 22.36 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 545 0 1.18E+03 22.36 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 D.0 546 0 1.17E+03 22.35 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 547 0 1.16E+03 22.35 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 548 0 1.14E+03 22.35 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 549 0 1.13E+03 22.35 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 550 0 1.12E+03 22.35 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 551 0 1.11 E+03 22.35 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 552 0 1.10E+03 22.34 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 553 0 1.09E+03 22.34 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 554 0 1.08E+03 22.34 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 555 0 107E+03 22.34 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 556 0 1.06E+03 22.34 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 557 0 1.05E+03 22.34 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 558 0 1.04E+03 22.33 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 559 0 1.02E+03 22.33 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 560 0 1.01E+03 22.33 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 561 0 1.00E+03 22.33 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 562 0 9.92E+02 22.33 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 563 0 9.81 E+02 22.33 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 564 0 9.70E+02 22.32 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 565 0 9.59E+02 22.32 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 566 0 9.48E+02 22.32 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 567 0 9.37E+02 22.32 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 Iyr 24hr Storm - Sand Filler Division Truck Company and MP Company Interim Facilities Page 8 of 10 RECEIVED .1111 17 2009 BY: Riser Eirer E.,enq, Thr. 1.11". Stom, Swge (futnUN (rlrinfC) (Went EUrrel En\pNt' Qrir.,e#1 Underdriin Woe 'I'UV or llam (min) (ery) Icu n) (n) lerd (rrs) (rrs) (rrs) (rrs) (ers) (crs) lurrl let,) 568 0 9.26E+02 22.32 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 569 0 9.15E+02 22.32 0.18 0.0 0.0 0.000 0.0 0.00 O.t8 0.0 0.0 570 0 9.04E+02 22.31 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 571 0 8.93E+02 22.31 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 572 0 8.82E+02 22.31 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 573 0 8.71 E+02 22.31 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 574 0 8.60E+02 22.31 0.18 0.0 0.0 0.000 0.0 MO 0.18 0.0 0.0 575 0 8.49E+02 22.31 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 576 0 8.39E+02 22.30 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 577 0 8.28E+02 22.30 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 578 0 8.17E+02 22.30 0.18 0.0 0.0 O.000 0.0 0.00 0.18 0.0 0.0 579 0 8.06E+02 22.30 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 580 0 7.95E+02 22.30 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 581 0 7.84E+02 22.30 0.18 00 00 0.000 0.0 0.00 0.18 0.0 0.0 582 0 7.73E+02 22.29 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 583 0 7.62E+02 22.29 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 584 0 7.51 E+02 22.29 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 585 0 7.40E+02 22.29 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 586 0 7.29E+02 22.29 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 587 0 7.18E+02 22.29 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 588 0 7.07E+02 2228 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 589 0 6.96E+02 22.28 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 590 0 6.85E+02 22.28 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 00 591 0 6.74E+02 22.28 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 592 0 6.64E+02 22.28 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 593 0 6.53E+02 22.28 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 594 0 6.42E+02 22.27 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 595 0 6.31 E+02 22.27 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 596 0 6.20E+02 22.27 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 597 0 6.09E+02 22.27 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 598 0 5.98E+02 22.27 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 599 0 5.87E+02 22.26 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 600 0 5.76E+02 22.26 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 601 0 5.65E+02 22.26 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 602 0 5.54E+02 22.26 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 603 0 5.43E+02 22.26 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 604 0 5.32E+02 22.26 0.18 0.0 0.0 0.000 0.0 0.00 OAS 0.0 0.0 605 0 5.21E+02 22.25 OAR 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 606 0 5.10E+02 22.25 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 607 0 4.99E+02 22.25 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 608 0 4.89E+02 22.25 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 609 0 4.78E+02 22.25 0.18 0.0 0.0 0.000 0.0 O.00 0.18 0.0 0.0 610 0 4.67E+02 22.24 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 611 0 4.56E+02 22.24 0.18 0.0 0.0 0.000 0.0 OM 0.18 0.0 0.0 612 0 4.45E+02 22.24 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 613 0 4.34E+02 22.24 0.18 0.0 0.0 O.000 0.0 0.00 0.18 0.0 0.0 614 0 4.23E+02 22.24 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 615 0 4.12E+02 22.24 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 616 0 4.01E+02 22.23 0.18 0.0 0.0 0.000 00 0.00 0.18 0.0 0.0 617 0 3.90E+02 22.23 0.18 0.0 0.0 0.000 OD 0.00 0.18 0.0 0.0 618 0 3.79E+02 22.23 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 619 0 3.68E+02 22.23 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 620 0 3.57E+02 22.23 0.18 0.0 00 0.000 0.0 0.00 0.18 0.0 0.0 621 0 3.46E+02 22.22 0.18 00 0.0 0.000 0.0 0.00 0.18 0.0 0.0 622 0 3.35E+02 22.22 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 623 0 3.24E+02 22.22 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 624 0 3.14E+02 22.22 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 625 0 3.03E+02 22.22 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 626 0 2.92E+02 22.21 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 627 0 2.81 E+02 22.21 0.18 0.0 0.0 0.000 0.0 0.00 0.18 O.O 0.0 628 0 2.70E+02 22.21 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 629 0 2.59E+02 22.21 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 630 0 2.48E+02 22.21 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 631 0 2.37E+02 22.20 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 632 0 2.26E+02 22.20 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 633 0 2.15E+02 22.20 0.18 0.0 0.0 0.000 0.0 0.00 0.18 00 0.0 634 0 2.04E+02 22.20 0.18 0.0 0.0 0.000 0.0 0.00 0.18 O.O 0.0 635 0 1.93E+02 22.20 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 636 0 1.82E e02 22.19 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 637 0 1.71 E,02 22.19 0.18 0.0 0.0 0.000 0.0 0.00 0.18 O.O 0.0 638 0 1.60E+02 22.19 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 639 0 1.49E+02 22-19 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 640 0 1.39E+02 22.18 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 641 0 1.28E+02 22.18 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0,0 0.0 642 0 1.17E+02 22.18 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0'0 0.0 643 0 1.06E+02 22.18 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 t yr 24hr Storm - Sand Filter Division Truck Company are MP Company Interim Facilities Page 9 of 10 121F�C:gV]Fi� JUL 1 7 2009 BY: Riser Riser Emergency Time InOnw Srurage Sorge Oulnres (Orifice) (%9eir) ItarrO RIIsRwy Orifice#] Underdrain Wor '1'np of Dum (min) (dt) ream 00 (ers) (cr.,) (en) (efr) (efr) (cfr) (ers) (efs) ndt) 644 0 9.48E+01 22.17 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 645 0 8.38E+01 22./7 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 646 0 7.29E+01 22.17 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 647 0 6.19E+01 22.17 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 648 0 5.10E+01 22.16 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 649 0 4.01E+01 22.16 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 650 0 2.91 E+01 22.16 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 651 0 1.82E+01 22.16 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 652 0 7.25E+00 22.15 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 653 0 0.00E+00 22.15 0.00 0.0 0.0 0.000 0.0 0.00 0.00 0.0 0.0 1yr 24hr Storm - Sand Filter Division Truck Company and MP Company Interim Facilities Page 10 of 10 lyr 24hr Routing - Sand Filter 6.0 5.0 x 4.0 3 3.0 0 LL 2.0 r�{ r 1.0 o C 0.0 1. 0 50 100 150 200 250 300 350 400 450 Time (min) Inflow Hydrograph —M-- Outflow Hydrograph Brunswick Nuclear Plant Unit 1 Capacitor Bunk Installation Drainage Area [)only 10 yr-Storm Rewiv, Norm surfama= N/A re Max cart area= 0,23 nc R,ma ,d SA = N/A ea Peak xt.gF 23.66 It Peak outflow= 1.9 el, Rix= 1.511t Pre-Developmem Freeboard Flow 19 cis Qnax stage) 0,7 D ].Puts Stage Storage flydrograph Inputs Ks- 7757 Op. 7.4 cis b= 1.19 Tp= 27 min Zo= 22.15 CrT. I min Initial Water Level, Zi= 22.15 It Outflow Dm;ces Riscrmarrel Spillway. N. 0 Number of Risers Orifice NI Drlser- 0 in Riser Diameter N- 0 Cw= 3.30 Riser Weir Coed D. 0 in Cd- 0.6 Riser Orifice Craft Cd= 06 Zcr= 233 B Riser Crest Elev Inv= 20 R n�!_ i��!Tn�26a� [J3y:' � Do= 0 in Barrel Diameter Cd= 0.6 Barrel orifice coeff Underdrain Zinv. 20 R Elev invert barrel N- 2 D. 4 in Emergency Weir: O= 0. 182 efs assumes constant head @ of 22.15 L= 5 B Inv= 22.15 R (lop of sand) Za- 23.4 R Cw= 2.51LMk Top of Dam L= 150 R Za. 24 h Cw= 29 rass 1j 9j Kiser Kiser Emergency 'lime Inflow Storage Stage Outnow (Orifice) (Weir) Barrel Nlispey Orifice Nl Uderdrain Weir Top of Dom (.at.) (efs) (cu R) (R) (efs) (efs) Icfx) (cfs) lcfsl (cfs) (cN) (efs) (cr.,) 0 0 0.00E+00 22.15 0.00 0.0 0.0 0.000 0.0 0.00 0.00 0.0 0.0 1 0 0.00E+00 22.15 0.00 0.0 0.0 0.000 0.0 0.00 0.00 0.0 0.0 2 0 1.46E+00 22.15 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 3 0 0.00E+00 22.15 0.00 0.0 0.0 0.000 0.0 0.00 0.00 0.0 0.0 4 0 1.30E+01 22.15 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 5 1 2.51E+01 22.16 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 6 1 4.98E+01 22.16 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 7 1 8.95E+01 22.17 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 8 1 1.46E+02 22.19 0.18 0.0 0.0 0,000 0.0 0.00 0.18 0.0 0.0 9 2 2.23E+02 22.20 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 10 2 3.20E+02 22.22 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 11 3 4.40E+02 22.24 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 12 3 5.84E+02 22.26 0.111 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 13 3 7.53E+02 22.29 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 14 4 9.47E+02 22.32 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 15 4 1.17E+03 22.35 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 16 5 1.41 E+03 22.39 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 17 5 1.68E+03 22.43 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 18 5 1.97E+03 22.47 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 19 6 2.29E+03 22.51 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 20 6 2.63E+03 22.55 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 21 6 2.99E+03 22.60 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 22 7 3.37E+03 22.65 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 23 7 3.76E+03 22.69 0.18 0.0 0.0 0,000 0.0 0.00 0.18 0.0 0.0 24 7 4A7E+03 22.74 0.18 0.0 0.0 0.000 0.0 0.00 US 0.0 0.0 25 7 4.59E+03 22.79 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 26 7 5.01E+03 22,84 0.18 0.0 0.0 0,000 0.0 0.00 0.18 0.0 0.0 27 7 5.44E+03 22.89 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 28 7 5.88E+03 22.94 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 29 7 6.31 E+03 22.99 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 30 7 6.74E+03 23.04 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 3t 7 7.17E+03 23M 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 32 7 7.58E+03 23.13 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 33 7 7.99E+03 23.18 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 34 6 8.38E+03 23.22 0.18 0.0 0.0 0,000 0.0 0.00 0.18 0.0 0.0 10yr 24hr Storm - Sand Filter Division Truck Company and MP Company Interim Facilities Page 1 of 3 ii ii 1 7 91009 Riser Riser [tj i ' liruerzeuq.-� 'rinw ionow 5tanige Set, Outflow (Orifice) (Wor) Barrel Rlt.,pwy OriBuu#I-UiiuIvtd,ain Weir 'rop of Mani faun) (er.,) (cu f) (R) (ets) (crs) (ers) (ets) lets) lelh) (du (cf,) (efs) 35 6 8.75E+03 23.26 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 36 6 9.11 E+03 23.29 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 37 6 9.45E+03 23.33 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 38 5 9.78E+03 23.36 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 39 5 1.01 E+04 23.40 0.18 0.0 0.0 0.000 0.0 0.00 0.18 0.0 0.0 40 5 1.04E+04 23.43 0.24 0.0 0.0 0.000 0.0 0.00 0.18 0.1 0.0 41 5 1.07E+04 23.46 0.34 0.0 0.0 0.000 0.0 0.00 0.18 0.2 0.0 42 4 1.09E+04 23.48 0.47 0.0 0.0 0.000 0.0 0.00 0.18 0.3 0.0 43 4 1.11 E+04 23.51 0.61 0.0 0.0 0.000 0.0 0.00 0.18 0.4 0.0 44 4 1.14E+04 23.53 0.75 0.0 0.0 0.000 0.0 0.00 0.18 0.6 0.0 45 4 1.16E+04 23.55 0.89 0.0 0.0 0.000 0.0 0.00 0.18 0.7 0.0 46 4 1.17E+04 23.57 1.02 0.0 0.0 0.000 0.0 0.00 0.18 0.8 0.0 47 3 1.19E+04 23.58 1.15 0.0 0.0 0.000 0.0 0.00 0.18 1.0 0.0 48 3 1.20E+04 23.60 1.26 0.0 0.0 0.000 0.0 0.00 0.18 1.1 0.0 49 3 1.21 E+04 23.61 1.36 0.0 0.0 0.000 0.0 0.00 0.18 1.2 0.0 50 3 1.23E+04 23.62 1.46 0.0 0.0 0.000 0.0 0.00 0.18 1.3 0.0 51 3 1.24E+04 23.63 1.54 0.0 0.0 0.000 0.0 0.00 0.18 1.4 0.0 52 3 1.24E+04 23.64 1.61 0.0 0.0 0.000 0.0 0.00 0.18 1.4 0.0 53 3 1.25E+04 23.64 1.68 0.0 0.0 0.000 0.0 0.00 0.18 1.5 0.0 54 2 1.26E+04 23.65 1.73 0.0 0.0 0.000 0.0 0.00 0.18 1.5 0.0 55 2 1.26E+04 23.65 1.77 0.0 0.0 0.000 0.0 0.00 0.18 1.6 0.0 56 2 1.26E+04 23.66 1.81 0.0 0.0 0.000 0.0 0.00 0.18 1.6 0.0 57 2 1.27E+04 23.66 1.83 0.0 0.0 0.000 0.0 0.00 0.18 1.6 0.0 58 2 1.27E+04 23.66 1.85 0.0 0.0 0.000 0.0 0.00 0.18 1.7 0.0 59 2 1.27E+04 23.66 1.86 0.0 0.0 0.000 0.0 0.00 0.18 13 0.0 60 2 1.27E+04 23.66 1.87 0.0 0.0 0.000 0.0 0.00 0.18 1.7 0.0 61 2 1.27E+04 23.66 1.87 0.0 0.0 0.000 0.0 0.00 0.18 1.7 0.0 62 2 1.27E+04 23.66 1.86 0.0 0.0 0.000 0.0 0.00 0.18 1.7 0.0 63 2 1.27E+04 23.66 1.86 0.0 0.0 0.000 0.0 0.00 0.18 1.7 0.0 64 2 1.27E+04 23.66 1.84 0.0 0.0 0.000 0.0 0.00 0.18 1.7 0.0 65 1 1.27E+04 23.66 1.83 0.0 0.0 0.000 0.0 0.00 0.18 1.6 0.0 66 1 1.26E+04 23.66 1.81 0.0 0.0 0.000 0.0 0.00 0.18 1.6 0.0 67 1 1.26E+04 23.65 1.78 0.0 0.0 0.000 0.0 0.00 0.18 1.6 0.0 68 1 1.26E+04 23.65 1.76 0.0 0.0 0.000 0.0 0.00 0.18 16 0.0 69 1 1.26E+04 23.65 1.73 0.0 0.0 0.000 0.0 0.00 0.18 1.5 0.0 70 1 1.25E+04 23.65 1.70 0.0 0.0 0.000 OA 0.00 0.18 1.5 0.0 71 1 1.25E+04 23.64 1.67 0.0 0.0 0.000 0.0 0.00 0.18 1.5 0.0 72 1 1.25E+04 23.64 1.64 0.0 0.0 0.000 0.0 0.00 0.18 1.5 0.0 73 1 1.24E+04 23.64 1.61 0.0 0.0 0.000 0.0 0.00 0.18 14 0.0 74 1 1.24E+04 23.63 1.58 0.0 0.0 0.000 0.0 0.00 0.18 IA 0.0 75 1 1.24E+04 23.63 1.54 0.0 0.0 0.000 0.0 0.00 0.18 1.4 0.0 76 1 1.23E+04 23.62 1.51 0.0 0.0 0.000 0.0 0.00 0.18 1.3 0.0 77 1 1.23E+04 23.62 1.48 0.0 0.0 0.000 0.0 0.00 0.18 1.3 0.0 78 1 1.22E+04 23.62 1.44 0.0 0.0 0.000 0.0 0.00 0.18 1.3 0.0 79 1 1.22E+04 23.61 1.41 0.0 0.0 0.000 0.0 0.00 0.18 1.2 0.0 80 1 1.22E+04 23.61 1.38 0.0 0.0 0600 0.0 0.00 0.16 1.2 0.0 81 1 1.21 E+04 23.60 1.34 0.0 0.0 0.000 M 0.00 0.18 1.2 0.0 82 t 1.21E+04 23.60 1.34 0.0 0.0 0.000 0.0 0.00 0.18 1.1 0.0 83 1 1.20E+04 23.60 1.28 0.0 0.0 0.000 0.0 0.00 0.18 1.1 0.0 84 1 1.20E+04 23.59 L24 0.0 0.0 0.000 0.0 0.00 0.18 1.1 0.0 85 1 1.20E+04 23.59 1.21 0.0 0.0 0.000 0.0 0.00 0.18 1.0 0.0 86 1 1.19E+04 23.59 1.18 0.0 0.0 0.000 0.0 0.00 0.18 1.0 0.0 87 1 1.19E+04 23.58 1.15 0.0 0.0 0.000 0.0 0.00 0.18 1.0 0.0 88 0 1.19E+04 23.58 1.12 0.0 0.0 0.000 0.0 0.00 0.18 0.9 0.0 89 0 1.18E+04 23.57 1.09 0.0 0.0 0.000 0.0 0.00 0.18 0.9 M 90 0 1.18E+04 23.57 1.06 0.0 0.0 0.000 0.0 0.00 0.18 0.9 0.0 91 0 1.17E+04 23.57 1.03 0.0 0.0 0.000 0.0 0.00 0.18 0.8 0.0 92 0 1.17E+04 23.56 1-00 0.0 0.0 0.000 0.0 0.00 0.1B 0.8 0.0 93 0 1.17E+04 23.56 0.98 0.0 0.0 0.000 0.0 0.00 0.18 0.8 0.0 94 0 1.16E+04 23.56 0.95 0.0 0.0 0.000 0.0 0.00 0.18 0.8 0.0 95 0 1.16E+04 23.55 0.92 0.0 0.0 0.000 0.0 0.00 0.18 0.7 0.0 96 0 1.16E+04 23.55 0.90 0.0 0.0 0.000 0.0 0.00 0.18 0.7 0.0 97 0 1.15E+04 23.55 0.87 0.0 0.0 0.000 0.0 0.00 0.18 0.7 0.0 98 0 1.15E+04 23.54 0.85 0.0 0.0 0.000 0.0 0.00 0.18 0.7 0.0 99 0 1.15Et04 23.54 0.83 0.0 0.0 0.000 0.0 0.00 0.18 0.6 0.0 100 0 1.14E+04 23.54 0.81 0.0 0.0 0.000 0.0 0.00 0.16 0.6 0.0 101 0 1.14Ef04 23.53 0.78 0.0 0.0 0.000 0.0 0.00 0.18 0.6 0.0 102 0 1.14E+04 23.53 0.76 0.0 0.0 0.000 0.0 0.00 0.18 0.6 0.0 103 0 1.13E+04 23.53 0.74 0.0 0.0 0.000 0.0 0.00 0.18 0.6 0.0 104 0 1.13E+04 23.52 0.72 0.0 0.0 0.000 0.0 0.00 0.18 0.5 0.0 105 0 1.13E+04 23.52 0.70 0.0 0.0 0.000 0.0 0.00 0.16 0.5 0.0 106 0 1.13E+04 23.52 0.68 0.0 0.0 0.000 0.0 0.00 0.18 0.5 0.0 107 0 1.12E+04 23.51 0.66 0.0 0.0 0.000 0.0 0.00 0.18 0.5 0.0 108 0 1.12E+04 23.51 0.65 0.0 0.0 0.000 0.0 Mo 0.18 0.5 0.0 109 0 1.12E+04 23.51 0.63 0.0 0.0 0.000 0.0 0.00 0.18 0.4 0.0 110 0 1.11 E+04 23.51 0,61 0.0 0.0 0.000 0.0 0.00 0.18 0.4 0.0 10yr 24hr Storm - Sand Filter Division Truck Company and MP Company Interim Facilities Page 2 of 3 BY:_ ---- Riser Riser Rrner,ue, 'Time InOow $drtage Slege Oelnow (OriOec) (Weir) Rurrel RRspwy Orifiaertl Underdmin Weir 'I'apofDann (ndn) (ers) teen) (n) nefs) refs) refs) (efs) )err) eery) (rrr) refs) refs) ill 0 1.11 E.04 23.50 0.60 0.0 0.0 0.000 0.0 0.00 0.18 0.4 0.0 112 0 1.11E+04 23.50 0.58 0.0 0.0 0,000 0.0 0.00 0.18 0.4 0.0 113 0 1.11 E+04 23.50 0.57 0.0 0.0 0.000 0.0 0.00 0.18 0.4 0.0 114 0 1.10E+04 23.50 0.65 0.0 0.0 0.000 00 0.00 0.18 0.4 0.0 115 0 1.10E+04 23.49 0.54 0.0 0.0 0.000 0.0 0.00 0.18 0.4 0.0 116 0 1.10E+04 23.49 0.52 0.0 0.0 0000 0.0 0.00 0.18 0.3 0.0 117 0 1.10E+04 23.49 0.51 0.0 0.0 0.000 0.0 0.00 0.18 0.3 0.0 118 0 1.09E+04 23.49 0.50 0.0 0.0 0.000 0.0 0.00 0.18 0.3 0.0 119 0 1.09E+04 23.48 0.48 0.0 0.0 0.000 0.0 0.00 0.18 0.3 0.0 120 0 1.09E+04 23.48 0.47 0.0 0.0 0.000 0.0 0.00 0.18 0.3 0.0 121 0 1.09E+04 23.48 0.46 0.0 0.0 0.000 0.0 0.00 0.18 0.3 0.0 122 0 1.09E+04 23.48 0.45 0.0 0.0 0000 0.0 0.00 0.18 0.3 0.0 123 0 1.08E+04 23.47 0.44 0.0 00 0.000 0.0 0.00 0.18 0.3 0.0 124 0 1.08E+04 23.47 0.43 00 0.0 0.000 0.0 0.00 0.18 0.2 0.0 125 0 1.08E+04 23.47 0.42 0.0 0.0 0.000 0.0 0.00 0.18 0.2 0.0 10yr 24hr Storm - Sand Filter Division Truck Company and MP Company Interim Facilities Page 3 of 3 9 8 7 6 H 5 w c+ 3 LL 4 3 2 M 10yr 24 hr Routing - Sand Filter 0 50 100 150 200 250 300 350 400 450 Time (min) 4 Inflow Hydrograph Outflow Hydrograph Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation Underdrain Calculations Drainage Area D only Per pag 11-9 filter media has a permeability'k' of 3.5 ft/day Area of Sand Filter 4500 SF Pipe Mannings N 0.011 Pipe Slope 0.005 Wit Per pag 11-9 filter media has a permeability'k' of 3.5 ft/day Therefore, k= 0.146 ft/hr Q=k'Area Q= 0.182 cfs Safety Factor= 10 Qmodified= 1.82 cis D= 1.76 in Check recovery of treatment volume WQV (1.5") required 8,494 ft3 Designed at 2x treatment volume on-line Assuming constant Q,t= 12.9 hours This is consistent with the time derived from 1 yr routing spreadsheet �\x ...... . DA �X f v X DA B N, X pow 7w332.0617 Ez 23W348.049 < 2 COENR STORMWAIER PERMIT PACKAGE EXISTING CONDITIONS Progress Energy CZ Ll �-T dl T I Dewberry I -- 7tz' ---F -F uwse —I L,,� I k� I TqTI. �ay I 'DA M� n DX F, 10 Dewberry LD 2. NCDNR SORMATER PERMT P NEWS WORKTDRAINAGE AREA MAPACKAGE 11 Progress Energy i ethe CW • • h k-AINI SCALE 1:12000 - 0 100 200 300 400 500 600 700 800 900 YARDS 0 1000 2000 FEET �'� 0 100 200 300 400 500 600 700 800 METERS 9°W 078 ° 01' 00.00" N Soil Map -Brunswick County, North Carolina (Brunswick County Nuclear Plant) MAP LEGEND MAP INFORMATION Area of Interest (AOI) Very Stony Spot Original soil survey map sheets were prepared at publication scale. ( j Area of Interest (AOI) Viewing scale and printing scale, however, may vary from the + Wet Spot original. Please rely on the bar scale on each map sheet for proper Soils A Other map measurements. Q Soil Map Units Special Line Features Source of Map: Natural Resources Conservation Service Special Point Features �`'• �� Gully Web Soil Survey URL: http://websoilsuNey.nres.usda.gov (9 Blowout Coordinate System: UTM Zone 17N v—,"✓ Short Steep Slope ® Borrow Pit This product is generated from the USDA-NRCS certified data as of Other the version date(s)listed below. X Clay Spot Political Features Soil Survey Area: Brunswick County, North Carolina 0 Closed Depression Municipalities Survey Area Data: Version 12, Feb 27, 2008 X Gravel Pit p Cities Date(s) aerial images were photographed: 1999: 3/6/2000 Gravelly Spot ,�j Urban Areas The orthophoto or other base map on which the soil lines were ® Landfill Water Features compiled and digitized probably differs from the background 0 Oceans imagery displayed on these maps. As a result, some minor shifting A Lava Flow of map unit boundaries may be evident. ,l,, Marsh I Streams and Canals 4t Mine or Quarry Transportation Rails Miscellaneous Water Roads �. Perennial Water N Interstate Highways y Rock Outcrop N US Routes } Saline Spot State Highways Sandy Spot Local Roads Severely Eroded Spot 1� Other Roads 0 Sinkhole Slide or Slip P Sodic Spot Spoil Area a Stony Spot Z i N �^ O "( O :O USDA Natural Resources Web Soil Survey 2.0 3/10/2008 Q= Conservation Service National Cooperative Soil Survey Page 2 of 3 Soil Map —Brunswick County, North Carolina Brunswick County Nuclear Plant Map Unit Legend ,z•. F. .Brunswick County, North Carolina (NC019) .. .. ., ,! 1 Map Unit%Symbol �'Is,i I 1� Map Unit Name t��" I' Acres irAOI , '= i F = { Percent of AOIi lr BaB Baymeade fine sand, 1 to 6 11.1 2.6% percent slopes BrB Bragg fine sandy loam, 2 to 6 342.3 80.0% percent slopes GoA Goldsboro fine sandy loam, 0 to 3.3 0.8% 2 percent slopes LA Longshoal muck 31.9 7.4% NhE Newhan fine sand, dredged, 2 13.4 3.1% to 30 percent slopes W Water 17.4 4.1% YaB Yaupon silty clay loam, 0 to 3 8.7 2.0% percent slopes Totals for Area of Interest (AOI) 428.2 100.0% Natural Resources Web Soil Survey 2.0 3/10/2008 Conservation Service National Cooperative Soil Survey Page 3 of 3 LMG "; Ii. �J P'�L LAND MANAGEMENT GROUP mc. .lU ? 200� Environmental Consultonts January 12, 2009 John Magee P.E. Silar Services 983 Butler Pilce Blue Bell, PA 19422 LLi Reference: Stormwater basin study for the proposed basin areas for the Progress Energy Plant, Located near South Port, NC. Dear Mr. Magee: On January 12, 2009, Land Management Group, Inc. had the pleasure of evaluating the Progress Engery proposed stormwater basin area. The purpose of the evaluation was to describe the soil profile, quantify the depth to the seasonal high water table, and to inform the project engineer of any potential limitations of this project. The soils at this site are mapped as Bragg soils in the Soil Survey of Brunswick County (USDA, 1986). Actual soil borings 18-20 confirms the soil to be a Baymeade/Foreston complex soil series, Appendix B. The Baymeade and Foreston soil series can best be described as soils that formed from depositional events of sandy and loamy marine sediments. The seasonal high water table is normally evident by observation of redoximorphic features suggesting past conditions of saturation and reduction. There is evidence of redoximorphic features at 70" in Boring 18, 5 1 " in boring 19 and 49" in boring 20 (see soil profile descriptions in Appendix B and Test Area Map Appendix A). No physical water levels were recorded on January 12, 2009 within test depth of soil borings 18 and 19, the physical water level was at 101" in boring 20, as documented in the soil profile descriptions, Appendix B. All recorded depths are from the existing surface as noted in the soil profile descriptions, Appendix B. The official published description and physical and chemical data for the Baymeade and Foreston soil series are shown in Appendix C for comparison. In summary, this site has an area that. is proposed for stormwater basin placement. This area has soils that have a seasonal high water tables at 70" in boring 18, 51" in boring 19 and 49" in boring 20. If infiltration rates are required, then they can be provided at the client's request. Please do not hesitate to contact me if you have any questions with this report. I may be reached at 910-452-0001, 910-471-0505 or at iihowell(glmeroup.net . Sincerely, Nicholas Howell NC Licensed Soil Scientist #1294 www.lmgroup.net • info@lmgroup.net ^ Phone: 9' 3805 Wrightsville Ave., Suite 15, Wilmington, NC 28403 C 28402 Progress Energy Brunswick County Stormwater Evaluation Test Area Map January 12, 2009 �� liw. t✓ �r- JUN z r 20Q9 ''Drawing Not To Scale* JOSoil Boring *-Drawing Provided By Others* Land Management Group, Inc. Job #30-09-007 Environmental Consultants P.O. Box 2522 John Magee Wilmington, NC Drawing by N.P.H. w .LNlGrouo.net Phone: 910452-0001 Fax: 910452-0060 Append x B Soil Profile Descriptions l t}^�� Ili.+ �✓ .Il.i� 1UN 2 2009 lUN 2 < 2005 Boring 18 Side Slope 1-2% Fill 0-36" Loamy Sand with few Sandy Loam bodies, structureless. Ab — 36-40" Loamy Sand, granular very friable non sticky non plastic, 1 OYR 3/1. Bw — 40-53" Loamy Sand, weak medium subangular blocky, fiiable non sticky non plastic, 1 OYR 4/4. E — 53-70" Sand, granular very friable, non sticky non plastic, 1 OYRE 7/4. Bt — 70-107" Sandy Loam, weak medium subangular blocky, friable slightly sticky non plastic, I OYR 5/8 with 7.5YR 518 and 5Y 6/1 mottles. Btg — 107-120" Sandy Loam, weak medium subangular blocky, friable, slightly sticky non plastic, 6Y 6/1 with 1 OYR 5/6 mottles. Physical Water: NA 9\�\ SHWT:70" =5.a3' a+ -S.a3- lba� e,,, Boring 19 Side Slope 2-4% Fill 0-29" Loamy Sand with few Sandy Loam bodies, structureless. Ab — 29-33" Loamy Sand, granular very friable non sticky non plastic, 1 OYR ,i/1. E — 33-41 " Sand, granular, very friable, non sticky non plastic, 1 OYR 7/2. Bh—41-45" Loamy Sand non cemented, granular friable non sticky non plastic, 1 OYR 3/3. E' — 45-51" Sand granular friable non sticky non plastic, IOYR 7/3. Btg— 51-120" Sandy Loam with few Sandy Clay Loam bodies, weak medium subangular blocky slightly sticky slightly plastic, 5Y 6/1 with 1 OYR 5/8, 7.5YR 5/8 and 5YR 5/8 mottles. Physical Water: NA SHWT: 5 1 " 7 ti.a5' aa.a9- y.a6 - Boring 20 Foot Slope 1-2% Fill — 0-24" Loamy Sand with few Sandy Loam bodies, structureless. Bh — 24-27" Loamy Sand non cemented, granular friable non sticky non plastic, 1 OYR 3/3. E — 27-49" Sand granular friable non sticky non plastic, 1 OYR 7/3. Bt — 49-120"Sandy Loam with few Sandy Clay Loam bodies, weak medium subangular blocky slightly sticky slightly plastic, 1 OYR 5/8 with 5Y 6/1, 7.5YR 5/8 and 5YR 5/8 mottles. Physical Water: 101" SHWT:51"- `i•Dr3' ai.a5-'4.a5- 17 ele4. ENVIRONMENTAL. SERVICES, INC. 524 S. NEW HOPE ROAD RALEIGH. NORTH CAROLINA 27610 919-212-1760 • FAX 919-212-1707 www.eiiviroiimeiitalservicesinc.com October 31, 2008 Ms. Christina Hcarn Progress Energy Carolinas, Inc. 100 East Davie Street TPP 18 Raleigh, NC 27601 Re: Brunswick Nuclear Plant Capacitor Bank Addition Additional Parcel Evaluation Brunswick County, North Carolina Ms. Hearn: JUNI ?, 200^ ER06-039.25 Thank you for contacting Environmental Services, Inc., (ESI) concerning the above referenced project. At your request, we have conducted a jurisdictional wetland and stream delineation and Global Positioning System (GPS) data collection for an additional parcel at the Brunswick Nuclear Plant, which is located in Brunswick County, Notch Carolina. This letter report outlines our findings pertaining to the jurisdictional delineation. If permitting is necessary for this project, an ousite review by the U.S. Army Corps of Engineers will likely be warranted to review the wetland delineation. Please call me if you have any questions or comments. As always, thank you for allowing ESI to provide services to Progress Energy Carolinas. Sincerely, ENVIRONMENTAL SERVICES, INC. ; 4r j v Robert Turnbull Senior Scientist Cc: Buzz Bryson FLORIDA • GEORGIA )ihrbour Ecology Division Manager NORTH CAROLINA • SOUTH CAROLINA • MARYLAND • OHIO [R1, —�4, --- _—�' - �- JUN 2 Natural Resource Assessment for the Brunswick Nuclear Plant Capacitor Bank Addition Additional Parcel Brunswick County,.North Carolina Prepared for: d Progress Energy Progress Energy Carolinas, Inc. 100 East Davie Sheet TPP 18 Raleigh, North Carolina 27601 Prepared by: LNVIRONMLNTAL SERVICES, INC. 524 South New Hope Road Raleigh, North Carolina 27610 October 2008 ENVIRONMENTAL SERVICES, INC. Natural Resource Assessment for the Brunswick Nuclear Plant Capacitor Bank Addition Additional Parcel Brunswick County, North Carolina October 2008 •'.1,- JUN 2 Z00 1 t Project Description. The additional parcel for the proposed capacitor bank addition project is located at the Brunswick Nuclear Plant in Brunswick County, North Carolina. The approximately 4.96-acre project site is depicted on the enclosed U.S. Geological Survey (USGS) map and aerial photograph. The proposed project area is located east of NC Highway 87, northeast of Southport and on the northwest side of the Brunswick Nuclear Plant property (Figure 1). Proiect Understandine Environmental Services, Inc., (ESI) was tasked by Progress Energy Carolinas, Inc. (PEC) to provide the following services for the Brunswick Plant project: • Jurisdictional wetland, stream, and surface water delineation, • Global Positioning System (GPS) data collection, • Report and graphics preparation. ESI was asked to delineate all jurisdictional features within the project study area. The project boundary was identified to ESI by PEC during the field investigation. The project boundary on the accompanying figures is an approximation based on an area identified by PEC. Two adjacent parcels were previously evaluated by ESI under a previous agreement. Backeround Research Prior to the initiation of field efforts, available resources were reviewed, including the USGS 7.5- minute topographic quadrangles of Southport, NC (USGS 1992), and the National Wetland Inventory (N\VI) quadrangles (USFWS 1992). Water Resources The project study area is in subbasin 03-06-17 of the Cape Fear River Basin and in USGS hydrologic unit 03030005 (USGS 1974, NCDWQ 2008). A Best Usage Classification (BUC) is assigned to waters of North Carolina based on the existing or contemplated best usage of various bodies of water. Nancy's Creek, the receiving water for the project study area, occurs approximately 600 feet northwest of the project study area. Nancy's Creek (Stream Index # 18-88-1-3) has been assigned a BUC of SC; Sw, HQW (NCDWQ 2008). Class SC waters are tidal salt waters protected for secondary recreation, fishing, aquatic life (including propagation and survival), and wildlife. Secondary recreation is any activity involving human body 2 ENVIRONMENTAL SERVICES, INC'I. , .JUN 2009 contact with water on an infrequent and incidental basis. The supplemental classificationiSw=indicates-- swamp waters, which have low velocities and other natural characteristics that are different from and adjacent streams. The supplemental classification HQW indicates High Quality Waters, which are waters that are rated as excellent based on biological and physical/chemical characteristics. Section 404 & 401 Wetlands and Surface Waters Section 404 of the Clean Water Act (CWA) requires regulation of discharges into "Waters of the United States". Although the principal administrative agency of the CWA is the U.S, Environmeptal Protection Agency (EPA), the U.S. Army Corps of Engineers (ALOE) has the majority of the responsibility for implementation, permitting, and enforcement of provisions of the Act. The ACOE regulatory program is defined in 33 CFR 320-330. Water bodies such as rivers, lakes, and streams are subject to jurisdictional consideration under the Section 404 program. However, by regulation, wetlands are also considered "Waters of the United States". Wetlands have been described as: "Those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas."[33 CFR 328.3(b) (1986)] According to the 1987 ACOE Wetland Delineation Manual (DOA 1987), areas must exhibit three distinct characteristics to be considered jurisdictional wetlands: l) display a prevalence of hydrophytic (water tolerant) plants, 2) area dominated by hydric soils, and 3) possess sufficient wetland hydrology indicators within 12 inches of the ground surface. Vegetation, soils, and hydrology data were collected during the field surveys in order to determine whether the three criteria were satisfied within each potential wetland area. Stream channels, if present within the project study area, were also delineated following criteria established by the N.0 Division of Water Quality (DWQ) and ACOE. Intermittent and perennial stream channels are also considered Waters of the United States under Sections 404 and 401 of the CWA. The jurisdictional wetland and stream delineation effort associated with this project occurred on 14 October 2008. The CiPS data collection occurred concurrently with the delineation effort. The ACOE "Rapanos" decision allows ACOE and EPA to establish Clean Water Act (CWA) jurisdiction under one of two standards. The first standard upholds CWA jurisdiction if the water body is "relatively permanent", and its adjacent wetlands directly abut the water body. The second standard upholds jurisdiction if a water body, in combination with all wetlands adjacent to that water body, has a "significant nexus" with traditional navigable waters. • Relatively Permanent Waters — A water body is relatively permanent if its flow is year round or its flow is continuous at least seasonally (e.g. three months). Wetlands adjacent to a "relatively permanent" tributary are also jurisdictional if those wetlands directly abut such a tributary. 3 ENVIRONMENTAL SERVICES, INC. JUN 2 2006 • Adjacent — Defined by ACOE and EPA as bordering, contiguous, or neighboring.=Wetlands separated from other waters of the U.S. by man-made dikes or barriers, berms, or dunes and the like are adjacent. • Abutting — Wetlands that are not separated from the tributary by an upland feature are abutting. • Signy7cant Alexrrs - A water body will be determined to have a "significant nexus" if its functions affect the chemical, physical, and biological integrity of a downstream traditional navigable water. Coastal Area Manneement Act (LAMA) The North Carolina Division of Coastal Management (NCDCM) and the Coastal Resources Commission (CRC) oversee CAMA, which affords additional protection to certain areas located within any of the twenty (20) coastal counties. Activities that impact certain coastal wetlands that are under the jurisdiction of CAMA, also known as Areas of Environmental Concern (AEC), typically require CAMA approval as granted through the NCDCM. Prc-determined areas within the project study area will qualify as AECs because they meet one or more of the following criteria defining AECs: 1) public trust waters; 2) estuarine waters; 3) coastal shorelines; and 4) coastal wetlands. Public trust waters are the coastal waters and submerged lands that every North Carolinian has the right to use. These areas often overlap with estuarine waters, but also include many "inland" fishing waters as defined by the North Carolina Marine Fisheries Commission. Estuarine waters are the state's oceans, sounds, tidal rivers and their tributaries, which stretch across coastal North Carolina and link to the other parts of the estuarine system: public trust areas, coastal wetlands, and coastal shorelines. Coastal shorelines include all lands within 75 feet of the normal high water level of estuarine waters. Coastal wetlands include any marsh in the 20 coastal counties that regularly or occasionally flood by lunar or wind tides, and includes one or more of the ten -listed CAMA plant species (NCDCM 2002). , Delineation Results One (1) Section 404 wetland was identified and delineated within the project study area (Figure 2). No CAMA wetlands were found within the project study area, although CAMA wetlands do occur northwest of the site near Nancy's Creek. The Section 404 wetland was flagged with sequentially numbered pink -and -black striped and solid blue flagging and is labeled Wl on Figure 2. A GPS based layout depicting the approximate extent and approximate location of this wetland was produced. This is not intended to be a replacement for a traditional survey nor is it intended to be used as such. ACOE Routine Welland Determination forms were also completed during the delineation. Welland Data One (1) wetland type occurs within the project study area: palustrine emergent (PFM), pursuant to the Cowardin Classification System (Cowardin et al. 1979). Palustrine wetlands are defined as all non - tidal wetlands dominated by trees, shrubs, persistent emergent, emergent mosses or lichens, and all such wetlands that occur in tidal areas where the salinity due to ocean -derived salts is below 0.5 parts Fit li� ENVIRONMENTAL SERVICES, INC. JUN 2 2000 17 per thousand (ppt). The palustrine wetlands within the project study area include areas dominated by emergent vegetation, thus the PEM designation. The PEM wetland consists of a primarily herbaceous community. Dominant species within the wetland area includes soft rush (Juncos effusos) and common reed (Phragnittes australrs). Hydric soils and primary hydrology indicators are present in the wetland area. W1 is directly abutting Nancy's Creek outside of the project study area. Table 1 contains the wetland data collected within the project study area. Table 1. Wetland data for the Brunswick Nuclear Plant project. Wetland ` Coivardih Wetland i ,"•Approximate Size " Riparian -Classification Ac'es(ac} * Y/N Wl PEM 0.22 N TOTAL: 0.22 'Acreage based on non -survey grade GPS data collected with a Trimble GcoXT and is not a substitute for a PIS prepared survey. Wetland and Stream Permittine Dredge and fill activities in "Waters of the United States" must be authorized by ACOE pursuant to Section 404 of the CWA and also by DWQ pursuant to Section 401 of the CWA. Waters considered navigable by the ACOE are also subject to permitting of obstructions to navigation under Section 10 of the Rivers and Harbors Act. There are no navigable waters within the project study area. Activities authorized by the ACOE are subject to further water quality requirements per Section 401 of the CWA. In North Carolina, the DWQ administers the Section 401 Water Quality Certification process. Coordination is recommended with ACOE in order to determine the permitting requirements for this project. Compensatory mitigation can be required by ACOE for projects determined to have a significant impact on Waters of the United States, including wetlands. Impacts to AECs will require a permit from NCDCM. There are no AECs within the project study area. Summary ESI identified one (1) Section 404 wetland within the project study area. Wetlands within the proposed project area total approximately 0.22 acre under the jurisdiction of both Section 404 and Section 401 of the Clean Water Act. Impacts to jurisdictional wetlands should be avoided and minimized as much as practicable. Unavoidable impacts will require permitting with ACOE and DWQ. 5 ENVIRONMENTAL SERVICES, INC. JUN 2 ZOOS REFERENCES Cowardin, L.M., V. Carter, F.C. Goblet, and E.T. Laroe. 1979. Classification of Wetland and Deepwater Habitats of the United States. 1J.S, Fish and Wildlife Service, USFWS/OBS 79/31. U.S. Department of Interior. 131 pp. [DOA] Department of the Army Enviromnental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual, Technical Report Y-87-1, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS. 100 pp. +appendices. [NCDCM] North Carolina Division of Coastal Management. 2002. CAMA Handbook for Development in Coastal North Carolina. Internet Address: dcm2.ennstate.nc.us. [NCDWQ] N.C. Division of Water Quality. 2004. Cape Fear River Basinwide Assessment Report. 336 pp. [NCDWQ] N.C. Division of Water Quality. 2008. Basinwide Information Management System (BIMS). Stream Classification. <h2o.enr.statc.nc.us/bims> accessed October 2008. [USFWS] U.S. Fish and Wildlife Service. 1992. National Wetland Inventory Mapping. Southport, NC 7.5-Minute Topographic Quadrangle maps. [USGS] U.S. Geological Survey. 1992. Southport, North Carolina. Topographic 7.5-minute quadrangle map. United States Geologic Survey, Washington, D.C. [USGS] U.S. Geological Survey. 1974. Hydrologic Unit Map. C ,. 1.0 17) f\/ • . `> 1 1 +.. �'� tip. S f 1 t; f '- ABahl it J "• u .c,.. ,-, ,� � �r —.� `' ' --✓f�if they NN --•. '� s. r� ,,� ^.u,.. 4d1 i f er V Project Location zv r' �:; f l \ ••f 1 � �' III � r y Ill o � :.• r� f dohWA If i 4 Town lip,park ` r tlt v i' r• � + �f t ' Project Boundary_ ' j J .!t..-_• _ ( ' ,)t,Si ` 'Location and extent Is approximate. // + 1 r—�---`'�� ••�``-"� � , 4,.� /:•' . F�DOIp \S f�Y�. .. � r /• n��I� Energy � gl�� IbYY®li 3SoO USGSDMQuadAVIRasle;PMWAe. SOu Wa0reni Ploy! Dixla'nar'The blamatlon deDiFl•AmNb'i" W bpx lnfamelbW MFW+y.^+/Wwu nd peperatl b• erA b not uire0ls b lnCm a agMen^B mlod b: DwnAery approrJmalod by ESI. nda XENVIItONMENTAL sERv► s c. Wbp�. tJo,N C•MW 1]DtD S YI]1b1 Project Location Brunswick Nuclear Plant Second Capacitor Bank Addition Project: ER06039.25 Date: Oct2008 Drwn/Chkd: EW/RT (D101 ]tEA]DI FW( I+mv.onv4onm•ntDlsoMwe4%oom Brunswick County, North Carolina Figure: 1 9 M T. Nil Nk NO 67 TN 27 Project Boundary* [==I Jurisdictional Welland Or 'Location and a ant is approximate X Fftt fOE 0 NTAL Approximate Jurisdictional Areas Project: ER06039.25 S r!Z; Brunswick Nuclear Plant Second Capacitor Bank Addition Drwn/Chkd: EW/RT Brunswick County, North Carolina Figure: 2 E7--w .'Y a Exhibit A ZUU9 RFP No. Page I of 2 Brunswick Nuclear Plant Unit 1 Capacitor Bank Installation Initial Grading Scope of Work 01/15/09 Clear and grade the sites per PGNC's Grading Specification, Schedule of Units, Approved Erosion Control Plan and PGNC's related drawings complete to include: Progress Energy Carolinas (PGNC) will obtain and pay for the following permits : NCDENR - Erosion and Sediment Control Permit 2. NCDENR - Stormwater Management Permit 3. Brunswick County Stormwater and Engineering Approval 4. CAMA (if necessary, to be prepared by PGNC) 2. No work can start on the site until the required permits have been approved. Furnish and install the "Temporary Construction Entrance" at all entrances. 4. Install the silt fence. Clear only enough area to install the silt fence. Clear only the area at and around all "Sediment and Erosion Control Devices" (Temporary Sediment Traps earthen berms and ditches, etc.). 6. Install the "Sediment and Erosion Control Devices" (Temporary Sediment Traps & etc.). Install the temporary earthen berms and ditches. Temporary seed and mulch all "Sediment and Erosion Control Devices" including the earthen berms and ditches within 15 working days after completion. Complete all clearing and grubbing of the site including the removal of all trees, stumps, trash, or any concrete from the site. Page I of 2 Rev. 7/01 /07 Exhibit A RFP No. JUN ? : 2M, 10. Grade the access road and substation site to the required elevations. 11. Install the storm drainage system including the storm sewer pipes with the associated junction boxes along with the required outlet protection. 12. Install and compact ABC stone on the access road and on a material storage yard area within the capacitor bank and circuit breaker fenced areas. 13. Permanently seed and mulch all disturbed areas on the site, except the area that will be inside the fence, after completion of grading and within 15 working days or 30 calendar days, whichever is shorter. 14. "Sediment and Erosion Control Devices" (Temporary Sediment Traps, temporary earthen berms and ditches, silt fences & etc.) shall be maintained through completion of the project. The contractor shall make any repairs as necessary to the Sediment and Erosion Control Devices" (Temporary Sediment Traps, temporary earthen berms and ditches, silt fences & etc.) throughout the life of his contract for the project. The contractor shall keep all sediment on site. 15. The contractor shall keep the Brunswick Nuclear Plant Access Road free of soil, stone, and debris from the construction site. It shall be the responsibility of the contractor to remove any soil, stone, and debris deposited onto the roadway by sweeping, washing or by other methods. 16. The contractor shall inspect all "Sediment and Erosion Control Devices" at least once weekly. The contractor shall also inspect all the "Sediment and Erosion Control Devices" after each rainfall of inch or more within 24 hours after the rain has stopped. In North Carolina, at each inspection of the "Sediment and Erosion Control Devices", the contractor is required to complete the "Stormwater Inspections for General Permit NCGO10000-Land Disturbing Activities form and post it in the permit box located on site. Page 2 of 2 Rev. 7/01 /07 INITIAL GRADING SCHEDULE OF UNITS for the I11 Exhibit B RFP No. Page 1 of 7 E7-Z� o ? z00s I 02/17/09 Note: Quantities typed in italic and enclosed in prentiees listed below with each bid unit are estimated quantities and are not guaranteed to be correct. 1. Furnish and install silt fence according to PGNC drawings RDC-54512, RDC-54513, , RDC- 54514, the approved Erosion Control Plan, grading specifications, and/or as specified by PGNC's Designated Representative. (1800 linear feet) Per Linear Foot 2. Grading the temporary erosion control devices: This price shall include the grading of the earth berms, diversion channels and the temporary sediment trap to the elevations specified in the Erosion Control Plan, as approved by the state of North Carolina and as shown on PGNC drawings RDC-54511, RDC-54512, RDC-54513, and RDC-54514. All elevations on RDC-54511, RDC-54512, RDC-54513, and the approved Erosion Control Plan are finished - dirt elevations. (Note: This price does not include silt fences) (Lump Sum) Lump Sum 3. Furnish and install the "temporary seeding", fertilizing, and mulching of all temporary berms, swales, sediment traps, and other erosion control areas as indicated on PGNC drawings RDC-54512, RDC-54513, and RDC-54514 and/or as specified by the approved Erosion Control Plan and PGNC's Designated Representative. (2 acres) Lump Sum 4. Clearing, grubbing, and disposal by "Hauling On -Site to an Approved Area Located on Brunswick_ Property as Indicated by PGNC's Designated Representative" of all wood, trees, stumps and trash from the sites including cut -and -fill slopes, diversion channels, borrow pits, and erosion control areas as specified in the approved Erosion Control Plan and as shown on PGNC drawings RDC-54508, RDC- 54511, RDC-54512, and RDC-54513. (1.5 acres) Lump Sum 5. Stripping of the substation lot and access drive areas and all cut and fill slopes to a maximum depth of six (6) inches as specified in the approved Erosion Control Plan and as shown on PGNC drawings RDC-54511, RDC-54512, RDC-54513 and as indicated in PGNC's grading specifications and/or as specified by PGNC's Designated Representative. Rev.7/01/07 The stripping material can be disposed of "on -site" in an Designated Representative. Exhibit B [!R�E,7 RFP No. „ `✓ .� Page 2 of 7 JUN 2 < 20P area indicated -.by PGNC's (2,022 cu. yds. Total Strippings) Lump Sum 6. Stripping of the sites lot and access drive areas and all cut and fill slopes to a maximum depth of six to twelve (6-12) inches as specified in the approved Erosion Control Plan and as shown on PGNC drawings RDC-54511, RDC-54512, RDC-54513, RDC-54514 and as indicated in PGNC's grading specifications and/or as specified by PGNC's Designated Representative. The stripping material can be disposed of "on -site" in an area indicated by PGNC's Designated Representative. (2,020 cu. yds. Total Strippings) Lump Sum (1,320 cu. yds. in Cut Area) (700 cu. yds. in Fill Area) 7. Grading and compacting the sites lot and access drive to the elevations specified in the approved Erosion Control Plan and as shown on PGNC drawings RDC-54511, RDC-54512, RDC-54513, to 95% standard proctor maximum density compaction. All grades on RDC- 54511, RDC-54512, RDC-54513 and the approved Erosion Control Plan are finished -dirt grades. This price shall include the grading of all permanent ditches, swales and the compliance with the Erosion Control Plan, as approved by the state of North Carolina. It shall be the responsibility of the Contractor to acquire the needed fill dirt from an "off -site" location to complete the grading of the substation lot and access drive. This off -site location must be an approved and licensed borrow pit. (Cut=11,565 cu. yds.) (Fill = 630 cu. yds.) (Cut Area=11,565 —1,320 (cud strippings) =10,245 cu. yds.) (Fill Area = 630 + 700 (fill strippings) =1,330 cu. yds.) (Select Sand Fill for BMP = 8,200 cue. yds) (See RDC-54514 for specifications for select sand) Lump Sum 8. The contractor shall employee an independent construction material engineering testing firm to monitor the proofrolling of the site after the strippings have been removed and to inspect and test the compacted fill areas in the substation lot and access road areas as indicated on PGNC grading specifications provided by PGNC's Designated Representative. Copies of the test results shall be furnished to PGNC's Designated Representative and others as indicated by PGNC's Designated Representative. PGNC's Designated Representative must approve the independent construction material engineering testing firm. Included with this bid proposal, the contractor shall furnish the name, address and a phone number of the independent construction material engineering testing firm for approval. Testing Firm: Name: Rev.7/01/07 Exhibit B RFP No. Page 3 of Address: JUN 2009 Phone #• Lz: (Lump Sum) Lump Sum 9. Furnish and install Geotextile Fabric in the access road under the ABC stone roadbed to improve the stability of the access road foundation and under all riprap or erosion control stone as shown on PGNC drawings RDC-54510 and RDC-54514. (815 sq. yds.) Per Square Yard 10. Excavation and disposal of unsuitable materials from the site lot and access drive areas. Any unsuitable materials must be disposed of "on -site" in an area as indicated by PGNC's Designated Representative. (2,022 cu. yds.) Per Cubic Yard 11. Backfill and compact the fill material required, due to the excavation of unsuitable material removed in the substation lot and access drive areas. This price shall include obtaining the needed material from an "off site" location, for the backfill and the compacting of the backfill material to 95% standard proctor maximum density compaction. It shall be the responsibility of the Contractor to acquire the needed fill dirt from an "off -site" location for the required backfill. This off -site location must be an approved and licensed borrow pit. (700 cu. yds.) Per Cubic Yard 12. Furnish and install Class B erosion control stone from any local stone quarry as shown on PGNC drawings RDC-54512, RDC-54513, RDC-54514 and according to PGNC grading specifications provided by PGNC's Designated Representative. (200 tons) Per Ton 13. Furnish and install Class A erosion control stone from any local stone quarry as shown on PGNC drawings RDC-54512, RDC-54513, RDC-54514 and according to PGNC grading specifications provided by PGNC's Designated Representative. (2 tons) Per Ton 14. Furnish and install No. 57 washed stone from any local stone quarry as shown on PGNC drawings RDC-54512, RDC-54513, RDC-54514 and according to PGNC grading specifications provided by PGNC's Designated Representative. Rev.7/01/07 (15 tons) Exhibit BRFP No. �'� Page 4 of 7 lU^! r 200 Per Ton 15. Furnish and install No. 67 washed stone from any local stone quarry as shown on PGNC drawings RDC-54512, RDC-54513, RDC-54514 and according to PGNC grading specifications provided by PGNC's Designated Representative. (20 tons) Per Ton 16. Furnish and install 4" diameter Schedule 40 PVC perforated pipe according to PGNC's drawings RDC-54510, RDC-54511, and grading specifications provided by PGNC's Designated Representative. (330 linear feet) Per Linear Foot 17. Furnish and install 10" diameter Schedule 80 PVC pipe according to PGNC's drawings RDC-54510, RDC-54511, and grading specifications provided by PGNC's Designated Representative. (741inear feet) Per Linear Foot 18. Furnish and install 1 (JB-1) storm drainage junction box(s) according to PGNC drawings RDC-54510, RDC-54511, and RDC-54514 and grading specifications provided by PGNC's Designated Representative. (1 - storm drainage junction box) Each 19. Furnish and install the "Permanent" seeding, fertilizing, mulching and anchoring of the straw of all disturbed areas along with the re -seeding of all temporary berms, swales, sediment traps, sedimentation filter basins, and other erosion control areas as indicated on PGNC drawing RDC-54512, RDC-54513, and RDC-54514 and/or as specified by the approved Erosion Control Plan and PGNC's Designated Representative. (2 acres) Lump Sum 20. Furnish and install ABC stone (granite stone) as shown on PGNC drawings RDC-54510 and according to PGNC grading specifications provided by PGNC's Designated Representative. (2050 tons) Per Ton 21. In case of additional work, the following Exhibit "D" should contain a list of all equipment Rev.7/01/07 Exhibit B RFP No. Page 5 or 7 and the hourly rates which includes move -in time, operator, fuel, oil, maintenance, and all components necessary for a complete and workable unit. The list should include labor and foreman hourly rates. ,1UN 2 < 2009 i'7.J Rev.7/01/07 EXHIBIT "D" EQUIPMENT MODEL OR TYPE PRICE/HOUR Exhibit B RFP No. Page 6 of 7 Rev.7/01/07 Exhibit B RFP No. Pa e7of7 C: ✓.:1: NOTES: JUN 1. If equipment breaks down or becomes inoperative, charges shall not apply until equipment is back in service. 2. Equipment shall be invoiced for only the actual time in use, excluding rental equipment. 3. Compensation for labor/equipment shall not be paid during lunch or break times. 4. Any additional material requested by PGNC's Designated Representative shall be billed at Contractor's actual cost plus %. RENTAL EOUIPMENT: 1. Any Equipment Rental, as approved by PGNC's Designated Representative to perform the requested work, shall be billed at contractor's actual cost plus 2. The percentage amount above contractor's actual rental cost, as listed above, shall also include the operator, fuel, and all operating/ maintenance cost pertaining to the rental equipment. SUBCONTRACTOR: Any use of subcontractors, as approved by PGNC's Designated Representative to perform the requested work, shall be billed at the subcontractor's actual cost plus %. Rev.7/01/07 GRADING SPECIFICATION CLEARING Exhibit C RFP No. "10 2 ZOOS tion Clearing, grubbing, and disposal of all wood, stumps, mulch and trash from the site lot and access drive areas including cut and fill slopes, diversion channels, borrow pits, and erosion control areas as specified in the approved Erosion Control Plan and as shown on PGNC drawings RDC-54511, RDC-54512, and RDC-54513. Contractor shall also be responsible for cutting and removal of all "Danger Trees". All trees to be cut as "Danger Trees" shall be determined on the site and indicated by flagging by PGNC's Designated Representative. A tree outside the clearing limits labeled as a "Danger Tree" need only to be cut as chose as possible to the ground level with the stump to remain. Contractor shall be responsible for obtaining all burning permits if burning is permitted. Contractor shall be responsible for any damage to Progress Energy Carolinas' property or any damage to adjacent property owners as a result of burning on this project. If burning is not permitted then the contractor shall remove all of the wood, trees, stumps and trash from the substation and access road areas including the cut and rill slopes, diversion channels, borrow pits, and erosion control areas and dispose of this material in an approved landfill site. Grinding the wood, trees, stumps and roots with a tub -type grinder is an acceptable method. The resulting mulch shall be removed from the site. No trees, brush, stumps, mulch or trash will be buried in the Till slopes or anywhere on the site. Contractor shall clear sufficient area outside of the edge of grade to install all necessary diversion channels. Stripping of sites lot, access drive areas, and all cut and rill slopes as specified in the approved Erosion Control Plan and as shown on PGNC drawings RDC-54511, RDC-54512, RDC-54513, and RDC-54514, to a maximum depth of one foot or as specified by PGNC's Designated Representative. Strippings can be used to build the rill slopes to the specified slope ratio only if the slope height is six feet (6') or less and the existing soil under the till slope area is not of an organic type material. Excess strippings can be used to flatten the fill slopes if the above conditions are met and if approved by PGNC's Designated Representative. Fill slopes that are 6 feet or more in height must be built with good compactable rill soil. After these fill slopes are built with good compactable rill soil, stripping may be applied to the rill slope surface to extend the slopes and/or flatten the till slope ratio. The amount of strippings that can be wasted on the rill slopes will be determined by how much area is available from the toe of the original Rev.7/01/07 Exhibit C JUN 2 < 2009 RFP No. Page 2 of 6 i rill slope and the distance to the temporary ditch and-berrn or the tree protection fencing. Strippings may not be wasted outside of these erosion control measures. The top 12 inches of any strippings that are placed in a rill slope or wasted anywhere on the site shall be free of roots and other debris that would inhibit mowing. The Contractor shall be responsible for removing this debris either by tractor root rake and/or by hand. Disposal of all other strippings will be the responsibility of the Contractor. If an area is available, the excess stripping may be disposed of on -site. If no on -site area is available, it will be the responsibility of the Contractor to dispose of the excess strippings at an off -site .location. This off -site location must be an approved and licensed landfill. GRADING Grading the sites lot and access drive to the elevations specified in the approved Erosion Control Plan and as shown on PGNC drawings RDC-54511 to 95% standard proctor maximum density compaction. All elevations specified in the approved Erosion Control Plan and shown on PGNC drawings RDC-54512, and RDC-54513 are finished -dirt grade elevations. This should include grading of all diversion channels at top and bottom of slopes. All cut and rill slopes shall be tracked with dozer tread as specified in Section 6.03 of the Erosion and Sediment Control Planning and Design Manual. Edge of grade shall be 20 feet outside of fence on the substation lot unless otherwise noted on the drawings. All fill slopes shall be a minimum of 3:1 horizontal to vertical unless otherwise noted on the drawings. All cut slopes shall be a minimum of 3:1 horizontal to vertical unless otherwise noted on the drawings. The access drive width shall be 52 feet each side of centerline with 50 feet each side of centerline consisting of ABC stone as indicated on PGNC drawing RDC-54510 or as indicated on the "Access Road Details" as shown on PGNC drawing RDC-54514. Geotextile Fabric shall be installed on the compacted soil grade under the ABC stone area of the roadbed as indicated on the "Access Road Details" as shown on PGNC drawing RDC-54514. The access drive shall be rolled with a vibrating roller after placement of ABC stone to specifications as seen practical by PGNC's Designated Representative. COMPACTED FILL Compaction Requirements for Controlled Fill All the organic topsoil is to be removed before placing any rill. In the construction of controlled fill, all soils shall he compacted to a density of at least equal to 95% of the Rev. 7/01 /07 1�,�` x'- ✓ �%— Exhibit C !UN 5 ZC)HRFP No. Page 3 of 6 maximum dry density at optimum moisture content-using=the:Standard Proctor Method and field controlled in accordance to the ASTM Specification D-698 (latest edition). When material varies from optimum moisture content, it shall be treated as follows: when wet, it shall be drained and worked by disking, harrowing, or other aerating techniques until the moisture content is reduced to the optimum value. When dry, the soil shall be sprinkled with water and mixed by discing or harrowing until the optimum moisture content is attained. Material for controlled compacted fill shall be obtained from a licensed borrow pit, approved in advance of construction by PGNC's Designated Representative. This borrow material shall be sampled and tested by an independent testing laboratory employed by the contractor if so requested by PGNC's Designated Representative. Construction of Compacted Fills Sandy soils shall be placed in layers no thicker than twelve (12) inches and compacted by one of the following methods: 1. A pneumatic tired rollers of at least 32 tons gross weight 2. A vibrating steel drum rollers. Clay soils shall be placed in nine (9) inch maximum layers and compacted by one of the following methods: 1. A sheep's foot roller having a drum at least 42 inches in diameter and of such weight as to produce a calculated foot pressure of 250 psi on a hard surface. 2. A pneumatic tired roller of at least 32 tons gross weight 3. A vibrating steel -drum roller or vibrating sheep's foot drum of eight to ten tons gross weight. 4. A self propelled compactor with 4 sheep's foot type wheels Areas inaccessible to compaction rollers shall be compacted with approved mechanical tamping compactors. Compaction equipment other than specified above may be used only with prior approval by PGNC's Designated Representative. The top surface of the compacted fill shall be sealed and finished rolled with a smooth tire pneumatic roller or a vibrating smooth steel -drum roller of eight to ten tons gross weight. Stones in the fill shall be well distributed. No stones over six inches in diameter shall be within 24 inches of finished grade. Each layer shall be free of roots and shall meet compaction requirements before succeeding layers are placed. Layers shall be maintained with a slope or crown to prevent erosion or ponding of water. When fill is placed adjacent to walls or other structural members liable to be disturbed by the compacting action, such members shall be braced or shored as necessary for their protection. Testing for Controlled Compacted Fill If an independent construction material engineering testing firm is not indicated in the Schedule of Units to be employed by the contractor throughout the duration of the grading of the compacted fill areas, then in the opinion of PGNC's Designated Representative if the contractor is not compacting the fill material to the required specifications, the PGNC's Rev. 7/01/07 JijINi 70011 j Exhibit C RFP No. Page 4 of 6 Designated Representative may request the assistance of an independent construction material engineering testing firm to inspect and test the compacted fill area. If the test results meet the required compaction specifications then PGNC will pay for the testing procedure, but if the compacted area in question does not meet the required compaction specifications then the testing fees will be billed to the contractor. The fill material shall be tested by the construction material engineering testing firm in blocks no greater than 5,000 square feet in area and one layer in thickness. Tests shall be made in accordance with ASTM-D-698, or such other methods as may be approved by PGNC's Designated Representative. More frequent testing may be required if, in the opinion of PGNC's Designated Representative, it is necessary to ensure thorough and uniform compaction. All test results shall be furnished to PGNC's Designated Representative and to any other PGNC employee as indicated by PGNC's Designated Representative. PGNC's Designated Representative must approve the independent construction material engineering testing firm. The contractor will furnish the name, address and a phone number of the independent construction material engineering testing firm to PGNC's Designated Representative for approval. Materials for Controlled Compacted Fill Materials for controlled compacted rill shall be natural earth, broken rock, or crushed rock. Borrow material shall be free of roots, stumps, other organic materials, frost, ice, frozen soil or rock materials larger than 0.50 cubic feet in volume. The top 24 inches of the fill shall have no rock materials larger than six inches in maximum dimension. If the borrow material is at a moisture content of more than two per cent (2%) plus or minus of the optimum moisture content as determined by the laboratory testing, it shall be treated in the borrow pit as previously specified until optimum moisture content is obtained. Material for controlled compacted fill shall be obtained from a licensed borrow pit approved in advance of construction by PGNC's Designated Representative. This material shall be sampled and tested by an independent testing laboratory employed by the contractor if so requested by PGNC's Designated Representative. STONE Furnish and install ABC stone according to PGNC's drawings and specifications provided by PGNC's Designated Representative. After initial grading, only the access drive and a material storage area will be stoned with ABC stone, or as specified by PGNC's Designated Representative. The ABC stone on the access road and the material storage area shall be compacted with a vibrating smooth drum roller of eight to ten tons gross weight. Rev. 7/01 /07 !UN z i 200i' Exhibit C RFP No. Page 5 of 6 The ABC stone used inside the site perimeter fenced area and the ABC stone installed up to a distance of six feet (6') outside the perimeter fence shall be granite type ABC stone (a minimum resistivity of 1500 ohm -meter). No limestone or marl type stone shall be used inside the site perimeter fenced area and in the six feet (6') stoned area outside of the perimeter fence. The ABC stone used on the access road may be obtained from any local stone quarry. All other types of stone (riprap, washed stone and the 2" to 3" washed stone for the temporary construction entrance) may be obtained from any local stone quarry. Contractor shall be responsible for obtaining all highway use permits, and shall be responsible for paying all fines resulting from failure to comply with state and county regulations. Furnish and install riprap according to PGNC's drawings and specifications provided by PGNC's Designated Representative. Riprap should be approximately 9 inches in diameter, unless otherwise specified on the PGNC's drawings. The contractor may machine place the riprap in the locations specified in the approved Erosion Control Plan and as shown on PGNC's drawings and/or as specified by PGNC's Designated Representative. Furnish and install erosion control stone according to specifications provided by PGNC's Designated Representative. Contractor shall install the erosion control stone in the locations as specified in the approved Erosion Control Plan and as shown on PGNC's drawings and/or as specified by PGNC's Designated Representative. Class A erosion control stone should be approximately 2 inches to 6 inches in diameter. Class B erosion control stone should be approximately 5 inches to 15 inches in diameter. Furnish and install #57 and/or #67 washed stone in the locations as specified in the approved Erosion Control Plan and as shown on PGNC's drawings and/or as specified by PGNC's Designated Representative. Furnish and install 2-inch to 3-inch course washed stone in the locations as specified in the approved Erosion Control Plan and as shown on PGNC's drawings and/or as specified by PGNC's Designated Representative. UNSUITABLE MATERIALS: REMOVAL. AND BACKFILLING All unsuitable material shall be excavated and the removal of this unsuitable material from substation lot and drive shall be the responsibility of the contractor. If an area is available, this unsuitable material may be disposed of on -site. If no on -site area is available, it will be the responsibility of the Contractor to dispose of this material at an off -site location. This off -site location must be an approved and licensed landfill. Rev.7/01/07 Exhibit C RFP No. Page 6 of 6 Backfill and compact the extra till material required, due to the excavation of unsuitable material removed in the substation lot and drive. This fill material shall be compacted to a density of at least equal to 95% of the maximum dry density at optimum moisture content using the Standard Proctor Method. If this extra till material is not readily available on the site, then obtaining the rill material required for the backfill from an off -site location shall be the responsibility of the contractor. This off -site location must be an approved and licensed borrow pit. EROSION CONTROL Compliance with erosion and sedimentation control plans as approved by the State of North Carolina, including earthen berms, swales, silt fences, diversion channels, brush barriers, filter basins and temporary sediment traps. The Contractor shall be responsible for compliance with all erosion and sedimentation control measures as specified in the approved Erosion Control Plan and as shown on PGNC drawings RDC-54512, and RDC-54513, or as directed by PGNC's Designated Representative. The Contractor shall be responsible for paying all fines that are assessed to PGNC resulting from failure to comply with these erosion control measures and regulations. The Contractor shall be responsible for compliance with any erosion and sedimentation control ordinances as required for any offsite land tills or licensed borrow pits that he might contract from private property owners. The Contractor shall be responsible for paying all fines resulting from failure to comply with these state and county regulations. These erosion control measures are to be implemented before any clearing of the substation lot and drive is allowed as indicated in the Approved Erosion Control Plan or as indicated by PGNC's Designated Representative. Rev. 7/01 /07 ]REC]EY`Lr�� JI.11_ 17 2009 Appendix L Level Spreader Calculations \ �H CAl7p��i� ono���ep9r. GINE''p2� Py�� '�11;145L*A N \? ]4.�'�rry '.7 Permanent Level Spreader - Drainage Area C fill. 17 ?�09 Project: Progress Energy Brunswick Nuclear Plant Unit 1 V. Client: Progress Energy Location: Southport, Brunswick County, North Carolina Objective: Design level spreader to convert concentrated flow to sheet flow in a non erosive manner. References: (1) NCDENR Stormwater BMP Manual (2) NOAA Atlas 14 Vo12, Version2, Southport 5 N, North Carolina Procedure: Use procedures outlined in the above reference. Rational Method will be used to calculate flows. Level spreader will be designed based on the 10-Year storm event. Calculations: Rational Method: O = C ' I ' A Where O = Flow (cfs) C = Runoff Coefficient I = Rainfall Intensity (in/hr) A = Drainage Area (ac) Find C value in Reference 2 Find Intensity for 10-year event C = 0.25 1 = 8.02 Drainage area (A) (ac) = 0.4 a (cfs) = 0.802 Determine Minimum Level Spreader Dimensions: Design Flow 0.80 Min Required Len th 113 Actual Design Length 150 Unit 1 Perm Level Spreader Calcs.xlsx 7/15/2009 CEIVFD Permanent Level Spreader - Drainage Area D II II- 1 7 2009 Project: Progress Energy Brunswick Nuclear Plant Unit 1 5Y: Client: Progress Energy Location: Southport, Brunswick County, North Carolina Objective: Design level spreader to convert concentrated flow to sheet flow in a non erosive manner References: (1) NCDENR Stormwater BMP Manual (2) NOAA Atlas 14 Vo12, Version2, Southport 5 N, North Carolina Procedure: Use procedures outlined in the above reference. Rational Method will be used to calculate flows. Level spreader will be designed based on the 10-Year storm event. Calculations: Flow O based on outflow from 6" PVC from Sand Filter Underdrains See appendix E for Sand Filter Calculations Q (cfs) = 0.18 Determine Minimum Level Spreader Dimensions: Desi n Flow 0.18 Min Required Length 113 Actual Design Length 115 Actual Design Length > Min Required Length JU^ Enclosure: Brunswick Progress Energy Carolinas, Im. Brunswick Nuclear Plant PO Box 10429 Southport, NC 26461 �I cX '01 s I ,, a ', .__ _ . l i� � G ' ! . 't 1 �' v �� �/ .. �_ � i ./J .' �� , �> �' i � � � � -• � . r �� ter' � � / / �i i� _ / !r f 'ii � � '! �� .. ,; ..r.; �- i ?�' a �?' . QC�I_j Pe.r* mow? ()g ()Sa? North Carolina Department of Environment and Natural Resources NCDENR Request for Express Permit Review For C-0 P e Y Reviewer: d- -i Submit: 4 — 2^ Time: to ' �3 Confirm: i �r�(i'1' C' Ir FILL-IN all the information below and CHECK the Permit(s) 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. Please include this form in the application package. • Asheville Region -Alison Davidson 828.296-4698;alison.davidson(oncmaiLnet • Fayetteville or Raleigh Region -David Lee 919-791.4203; david.lee(@,ncmail.net • Mooresville & -Patrick Grogan 704-663-3772 or patrick.grogan(pitncmail.net • Washington Region -Lyn Hardison 252-946.9215 or lvn.hardison(ancmail.net OGC� • Wilmington Region -Janet Russell 910-350.2004 or ianet.russeViricmail.net NOTE: Project application received after 12 noon will be stamped in the following work day Project Name: BRUNSWICK UNIT 1 CAPACITOR BANK ) County: BRUNSWICK Applicant: BRUNSWICK STEAM ELECTRIC PLANT Company: PROGRESS ENERGY CAROLINAS, INC. Address: 8470 RIVER ROAD SECity: SOUTHPORT, State: NC Zip: 28461- Phone: 919-546-7457 Fax::919-546-4409 Email: steve.cahoon@pgnmail.com Physical Location:_ Project Drains into NANCY'S CREEK waters - Water classification SC SW, HQ W (for classification see- httD:Hh2o.enr.state.nc.us/bims/reports/reportsWB.html) - Project Located in CAPE FEAR River Basin. Is project draining to class ORW waters? N:, within Y: mile and draining to class SA waters N or within 1 mile and draining to class HQW waters? Y Engineer/Consultant: VIRGINIA RUSSELL Company: DEWBERRY & DAVIS E C E 9 V E D Address: 2301 REXWOODS DRIVE City: RALEIGH, State: NC Zip: 27607-3366 Iona( Phone: 919-881-9939 Fax::919-881-9923 Email: fvrussell@dewberry.com MAY 2 0 2009 (Check all that apply) MN r. S 3r-0'J n 2„no,; nt e'r ❑ Scoping Meeting ONLY ElDWQ,,❑ DCM, ❑ DLR, ❑ OTHER: _ PROJ # vYy ❑ 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 #)] ❑ High Density -Detention Pond _ # Treatment Systems '® High Density -Infiltration 1 #Treatment SystemsT ❑ High Density -Bio-Retention _ # Treatment Systems ❑ High Density-Stormwater Wetlands _ # Treatment Systems ❑ High Density -Other _ # Treatment Systems /❑ MODIFICATION: ElMajor ❑ Minor ❑ Revision SW ❑ Coastal Management ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information _-1 ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront 5 �jo ® Land Quality ® Erosion and Sedimentation Control Plan with 3.13 acres to be disturbed.(CK # (for DENR use)) WETLANDS QUESTIONS MUST BE ADDRESSED BELOW ❑ Wetlands (401): Check all that apply Wetlands on Site ❑ Yes ® No Wetlands Delineation has been completed: ❑ Yes ❑ No US ACOE Approval of Delineation completed: ❑ Yes ❑ No 404 Application in Process w/ US ACOE: ❑ Yes ❑ No Permit Received from US ACOE ❑ Yes ❑ No Fee SDlltfor multiDleDermits: (Check# Isolated wetland on Property LJ Yes IJ No Buffer Impacts: ❑ No ❑ YES: acre(s) Minor Variance: ❑ No ❑ YES Major General Variance ❑ No ❑ YES 401 Application required: ❑Yes ❑ No If YES, ❑ Regular Perennial, Blue line stream, etc on site ❑ yes ❑ No For DENR use only Total Fee Amount $ SUBMITTAL DATES Fee I SUBMITTAL DATES Fee CAMA $ Variance ❑ Ma'; ❑ Min $ SW ❑ HD, ❑ LD, ❑ Gen $ 401: $ LQS 1 $ Stream Deter,_ $ A U NCDENR EXPRESS July 2008 'o`d' l�*Z ` �-- c� Progress Energy Progress Energy Carolinas, Inc. Raleigh, NC BRUNSWICK NUCLEAR PLANT UNIT 1 CAPACITOR BANK INSTALLATION SOUTHPORT, BRUNSWICK COUNTY, NORTH CAROLINA I4i 3 .....��.a... j apytlG tlsi [aEx 9E37T l9CSt50s UISTIMG @ ITIM FOc-5 w SITE ovFniu' Sim "Tm w sis�w ca xnsw 511E Rfil MI-5RI0.-a I ff 2 SITE NMI IBIt-51510. SM 2 ff 2 (i+0➢IIG i aPIKYi ft/N IpC-$1511. 91 1 ff 2 1 --'- - fAGllI1G i ffAlxN£ RIN FM 511. SX 2 ff 2 J I RNSE 1 EHI6Ia NII� RIYI MI-51512. SN 1 ff 2 R10.4 i EAEIa fLMIRY " ImC 51512. `N 2 ff 2 msE 1I EI�Ia m+mx nex SITE 1 PIl95E 11 E1061a [a11mL RNI (9["515131 a 1 ff 2 IW[-51513a 2 ff 3 __ __ OETBILS IBIC-51511. a t ff 4 LLTLIIS MI 51511. 5N 2 ff 4 .q g p A L5 IA[-51511. 91 3 6 1 4 B RTPILS T. 51511. 91 � OF 1 F rxcFi a nn L-T. VI[Ixl Ty u Proiect Descrintion The project is located at the Brunswick Nuclear Plant, Township of S.mithville, Brunswick County, North Carolina. The site is located off Highway 87 northeast of Southport, North Carolina. Progress Energy Carolinas, Inc. (PEC) is going to install two (2) 230kV capacitor banks at the Brunswick Nuclear Plant. The capacitor banks will each require a new circuit breaker, which will be located inside the existing switchyard fence. The Brunswick Nuclear Plant contains 2,920 acres of which a total of 3.13 acres will be disturbed due to the construction activities. The 3.13 acres is divided into two (2) smaller sites, A and B. Site A has a disturbed site area of 2.03 acres and is under review by NCDENR Land Quality for an Erosion and Sedimentation Control Permit. `Of the 2.03 acres site area, only 1.20 acres (drainage area) drain to the BMP. The remaining 0.83 acres will primarily be grassed and the stormwater runoff will, return to the original flow pattern. Site B has a disturbed area of 1.10 acres. The new construction of this site includes resurfacing of an ; existing gravel lot. No new impervious surface will be created. The area drains to an existing stormwater _treatment facility and therefore does not require a stormwater permit. The area is under review by NCDENR Land Quality for an Erosion and Sediment Control Permit. The Brunswick Nuclear plant is a secure site and to enter the facility you must obtain a pass. We did not supply an easement because the project is on land under one owner and no land sales are proposed. Existing Site Conditions The capacitor site (site A) is partially wooded and partially grass field and brush. The circuit breaker site (site B) is located on existing gravel and will remain as gravel after construction. The project area is in the Cape Fear River Basin. The majority of the site A (DA-A, C, D and F) discharges to Nancy's Creek. The remaining portion of site A (DA-B and E) discharges to an existing canal/levee system. Site B flows into an existing stormwater treatment facility that discharges to Nancy's Creek. Nancy's Creek is classified as SC, Sw, and FIQW. Class SC waters are tidal salt waters protected for secondary recreation, fishing, aquatic life and wildlife. The classification Sw indicates swamp waters, which have low velocities and other natural characteristics that are different from and adjacent streams. The supplemental HQW indicates High Quality Waters, which are waters that are rated as excellent based on biological and physicaVchemical characteristics. Soils Characteristics The soils in the area of construction are classified as BrB, Bragg fine sandy loam, 2 to 6 percent slopes according to the Soils map constructed 1967 by Cartographic Division, Soil Conservation Service, USDA, from 1965 aerial photographs. Stormwater Management Only the stormwater runoff from the capacitor bank (site A) of 1.20 acres will be treated via an open s 1_fil[er (this area includes the BMP). The post construction treatment area stormwater from the capacitor bank will sheet flow across gravel, into a forebay, over a fixed weir (concrete lip) into an open sand filter. The sand filter will allow water to percolate through filter media to remove pollutants and treat the stormwater. The Bow will be collected by an underdrain system at the bottom of the filter media and discharge to a level spreader and then sheet flow to Nancy's Creek and eventually the Ce Fear River. A MAY 2 0 2009 DWQ PROJ # The sand filter has beeiidesigned as anon -line system. Therefore, the device has been de is fined to treat i�twiC6 the required volume of the 1.5"iainfall event.- Further the forebay exceeds the minimum of 20% of the required ireotment volurne. Twice the required volume of stormwater will be stored in the sand filter and recover within the required 40 hour time period via'an underdrain system. The underdrain was sized in accordance with Section 5.7 of the North Carolina Division of Water Quality Best Management Practice manual, latest edition. In addition, the l-year, 24-hour post -construction flow rate will be released at a rate less than pre -construction flow rates. As the design exceeds both treatment volume and attenuation volume for the (site A) capacitor banks of 1.20 acres it also provides compensatory treatment and attenuation for all incidental areas of new impervious cover (such as driveway aprons — 0.1 l ac). The total 76% impervious (or 39,640 sf impervious area) reported on the application includes all new impervious surfaces. Summary of Stormwater Flow Rates Peak flow calculations (pre -construction and post -construction) going to the open sand filter were calculated using Rational Method. The inflow hydrograph and volumes were calculated using SCS method. The volume of runoff that must be controlled by the sand filter was calculated using Simple Method. Stage -storage -discharge model for the sand filter was developed using Chainsaw routing. All calculation methods are described in Section 3 of the North Carolina Division of Water Quality Best Management Practice manual, latest edition. The pre -construction and post -construction drainage area for the (site A) built upon area of 1.20 acres is considered for attenuation. An open sand filter will be utilized on this site to treat runoff from the site. The pre -constructed flow rate for the 1-year, 24-hour storm event is 1.3 cfs. The post -construction flow rate of 4.8 cfs is reduced to 0.18 cfs by the BMP. The detention storage volume will be recovered via an underdrain system at the bottom of the filter media. The underdrain system will discharge into a junction box. Larger storm events will bypass the sand filter over a weir located along the western perimeter berm. Physical constraints on the site prohibited the provision for an offline sand filter design. In order to abate the concern for overload of the sand filter the system has been designed to provide twice the required storage for treatment. The sand filter will recover the required volume within the allotted time of 40 hours and the forebay meets the minimum design depth of 3 feet and will retain a pool of water below the invert of the weir to the sand filter. Q a�B `SE8 aIf 3 sY W e K k i k NCDENR EXPRESS July 2008 a Dewberry ' El dim artµ \ %✓ `mil o0 0 tea, 0. a 440D ♦^ SEPC� Q * n, e S�RX XOV P.e1 Progress Energy Pepm 4rp Wia`.. PtlyVK B4.ISN CK 1i[lFM PVN! Lqi 1 ovcnu, s <.wi rvXo ire re . x rvX »a ,ra Russell, Janet From: Weaver, Cameron Sent: Wednesday, May 20, 2009 9:35 AM To: Russell, Janet Subject: FW: Express Review Brunswick Steam Electric Plant unit 1 Capaciotr Bank Attachments: REQUEST FOR EXPRESS 09 capbank Unit 1.doc; Narrative.pdf; RDC-54506 vincinity map.pdf; RDC-54507exixting conditions.pdf; RDC-54509sitelayout.pdf; RDC-54510(1) siteplan. pdf From: Cahoon, Steve[mailto:Steve.Cahoon@pgnmail.comj Sent: Wednesday, May 20, 2009 8:03 AM To: Cameron Weaver Subject: Express Review Brunswick Steam Electric Plant unit 1 Capaciotr Bank Cameron, Attached is the express review submittal for the Unit 1 Capacitor Bank Project we spoke about several weeks ago. Sorry for the delay in getting it to you, we needed to have a few internal meetings before we were ready to begin the permitting process. If you will recall we would like to have the express review for state storm water and sediment and erosion control. Please review the package and let me know if you have any questions. Thank you! Steve Cahoon Progress Energy Carolinas, Inc. Environmental, Health & Safety Services Vnet770-7457 Bell (919) 546-7457 Fax (919) 546-4409 , � § ■ | , ■ % 2 , � , ; Russell, Janet To: fvrussell@dewberry.com Cc: steve.cahoon@pgnmail.com Subject: Brunswick Unit 1 Capacitor Bank May 21, 2009 RE: Brunswick Unit 1 Capacitor Bank Mr. Cahoon & Ms. Russell We have scheduled a "scope„ meeting on the stormwater application for the above -referenced project with Christine Nelson on June 2, 2009 at 10:30 AM here in the Wilmington Regional Office, 127 Cardinal Drive Ext. Wilmington, 28405. Rhonda Hall will also be at the meeting to discuss the erosion control plan. It will benefit you to have an opportunity to discuss the proposed stormwater treatment before the actual application submittal date. attend the meeting on the 2nd, another "submittal' meeting may not be required. Please packages on the 2nd so that we might go over everything. The submittal requirements are attached for your review. Please respond to this email ASAP to confirm and reserve the meeting time and date. Thanks, Janet Russell Express Coordinator Note: New email address ianet.russell(@ncdenr.gov If both of you are able to bring the entire application i. \ L%`�J'� rl'T��C7V. - i•e� 1001 " S'i' :vJ7 � 1 \ p ds3sT o90<2Q 9 r."S wool eo 9fI9 0 su,br�',J-1-A 1 l�eeTlnc, Russell, Janet J From: Cahoon, Steve [Steve.Cahoon@pgnmaiI.com] Sent: Thursday, June 11, 2009 4:19 PM To: Russell, Janet Subject: RE: Unit 1 Capacitor Bank - Brunswick Thanks, Janet. Please reserve June 24" @ 11:00 am for an express review meeting for the Brunswick Unit 1 Capacitor Bank project. Steve Cahoon Progress Energy Carolinas, Inc. Environmental, Health & Safety Services Vnet 770-7457 Bell (919) 546-7457 Fax (919) 546-4409 From: Russell, Janet[mailto:janet.russell@ncdenr.gov] Sent: Thursday, June 11, 2009 4:16 PM To: Cahoon, Steve Cc: Russell, F. Virginia Subject: Unit 1 Capacitor Bank - Brunswick June 11, 2009 RE: Brunswick Unit 1 Capacitor Bank Steve The Express Stormwater submittal meeting has been scheduled with Christine Nelson on Wednesday, June 24, 2009 at 11:00 AM here in the Wilmington Regional Office. Please respond to this email to confirm and reserve the submittal meeting date. Thank You, Janet Janet M. Russell Express Coordinator 910 796-7421 NOTE: change in email address: janet.russell@ncdenr.gov Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. *LMG LAND MANAGEMENT GROUP INC. .OW Environmental Consultants bjYvwst"61, G, jl o 7 January 12, 2609 E 36 �.JrIDY'� Cori 'c,v John Magee P.E. /� k Silar Services v' v 983 Butler Pike Blue Bell, PA 19422 10,44 S d Reference: Stormwater basin study for the proposed basin areas for the Progress Energy Plant, Located near South Port, NC. Dear Mr. Magee: On January 12, 2009, Land Management Group, Inc. had the pleasure of evaluating the Progress Engery proposed stormwater basin area. The purpose of the evaluation was to describe the soil profile, quantify the depth to the seasonal high water table, and to inform the project engineer of any potential limitations of this project. The soils at this site are mapped as Bragg soils in the Soil Survey of Brunswick County (USDA, 1986). Actual soil borings 18-20 confirms the soil to be a Baymeade/Foreston complex soil series, Appendix B. The Baymeade and Foreston soil series can best be described as soils that formed from depositional events of sandy and loamy marine sediments. The seasonal high water table is normally evident by observation of redoximorphic features suggesting past conditions of saturation and reduction. There is evidence of redoximorphic features at 70" in Boring 18, 51" in boring 19 and 49" in boring 20 (see soil profile descriptions in Appendix B and Test Area Map Appendix A). No physical water levels were recorded on January 12, 2009 within test depth of soil borings 18 and 19, the physical water level was at 101" in boring 20, as documented in the soil profile descriptions, Appendix B. All recorded depths are from the existing surface as noted in the soil profile descriptions, Appendix B. The official published description and physical and chemical data for the Baymeade and Foreston soil series are shown in Appendix C for comparison. In summary, this site has an area that is proposed for stormwater basin placement. This area has soils that have a seasonal high water tables at 70" in boring 18, 5l" in boring 19 and 49" in boring 20. If infiltration rates are required, then they can be provided at the client's request. Please do not hesitate to contact me if you have any questions with this report. I may be reached at 910-452-0001, 910-471-0505 or at Iillowell(a hngrom).net . Sincerely, Nicholas Howell NC Licensed Soil Scientist #1294 www.lmgroup.net • info@lmgroup.net • Phone: 91 3805 Wrightsville Ave., Suite 15, Wilmington, NC 28403 28402 Progress Energy Brunswick County Stormwater Evaluation Test Area Map January 12, 2009 *Drawing Not To Scale" Soil Boring "Drawing Provided By Others*" Land Management Group, Inc. Job #30-09-007 Environmental Consultants P.O. Box 2522 John Magee Wilmington, NC Drawing by N.P.H. v .LMGroun.not Phone: 910452-0001 Fax: 910452-0060 Boring 18 Side Slope 1-2% Fill 0-36" Loamy Sand with few Sandy Loam bodies, structureless. Ab — 36-40" Loamy Sand, granular very friable non sticky non plastic, 1 OYR 3/1. Bw — 40-53" Loamy Sand, weak mediwn subangular blocky, friable non sticky non plastic, 1 OYR 4/4. E — 53-70" Sand, granular very fiiable, non sticky non plastic, 1 OYRE 7/4. Bt — 70-107" Sandy Loam, weak medium subangular blocky, friable slightly sticky non plastic, 1OYR 5/8 with 7.5YR 5/8 and 5Y 6/1 mottles. Btg— 107-120" Sandy Loam, weak medium subangular blocky, friable, slightly sticky non plastic, 6Y 6/1 with 10YR 5/6 mottles. Physical Water: NA SHWT: 70" Boring 19 Side Slope 2-4% Fill 0-29" Loamy Sand with few Sandy Loam bodies, structureless. Ab — 29-33" Loamy Sand, granular very friable non sticky non plastic, 10YR 311. E — 33-41" Sand, granular, very friable, non sticky non plastic, 1 OYR 7/2. Bh — 41-45" Loamy Sand non cemented, granular friable non sticky non plastic, 1 OYR 3/3. E'— 45-51" Sand granular friable non sticky non plastic, 1 OYR 7/3. Btg— 51-120" Sandy Loam with few Sandy Clay Loam bodies, weak medium subangular blocky slightly sticky slightly plastic, 5Y 6/1 with I OYR 518, 7.5YR 518 and 5YR 5/8 mottles. Physical Water: NA SHWT: 51" Boring 20 Foot Slope 1-2% Fill — 0-24" Loamy Sand with few Sandy Loam bodies, structureless. Bh — 24-27" Loamy Sand non cemented, granular friable non sticky non plastic, I OYR 3/3. E — 27-49" Sand granular friable non sticky non plastic, I OYR 7/3. Bt — 49-120" Sandy Loam with few Sandy Clay Loam bodies, weak medium subangular blocky slightly sticky slightly plastic, 1 OYR 5/8 with 5Y 6/1, 7.5YR 5/8 and 5YR 5/8 mottles. Physical Water: 101" SHWT: 51" Appendix C Published Description and Chemical and Physical Properties Of the Baymeade and Foreston Soil Series Official Series Description - BAYMEADE Series http://www2.ftw.nres,usda.gov/osd/dat/B/BAYMEADE.hti LOCATION BAYMEADE. NC Establisbed Series Rev. REI-I:ENH 07/1999 The Baymeade series consists of deep, well drained soils with moderately rapid permeability. They formed in loamy and sandy marine sediments of the lower Coastal Plain. Slopes range from 0 to 12 percent. Mean annual temperature is 63 degrees F., and mean annual precipitation is 54 inches. TAXONOMIC CLASS: Loamy, siliceous, semiactive, thermic Arenic Hapludults TYPICAL PEDON: Baymeade sand --on a 3 percent slope under nixed hardwood and pine. (Colors are for moist soil unless otherwise stated.) A--O to 3 inches; dark gray (1 OYR 4/1) fine sand; weak granular structure; loose; many fine and medium roots; many uncoated sand grains; moderately acid; abrupt smooth boundary. (2 to 10 inches thick) E--3 to 12 inches; light gay (i OYR 7/2) fine sand; single grained; loose; many fine and medium roots; slightly acid; gradual wary boundary. (0 to 15 inches thick) E/Bh--12 to 36 inches; very pale brown (1 OYR 7/4) fine sand; single grained; loose; cotmuon irregular bodies of friable organic coated sand that are dark brown (7.5YR 3/2) and brown (7.5YR 4/4) (Bh) make up about 12 percent of this horizon; many fine and medium roots; moderately acid; abrupt smooth boundary. (0 to 26 inches thick) Bt--36 to 49 inches; strong brown (7.5YR 5/6) fine sandy loam; weal: coarse subangular blocky structure that parts into weak fine granular structure; very friable; marry fine and medium roots; moderately acid; gradual wavy boundary. (5 to 40 inches thick) BC-49 to 58 inches; strong brown (7.5YR 5/6) loamy fine sand; weak fine granular structure; very friable; few fine roots; moderately acid; gradual wavy boundary. (0 to 17 inches thick) CI- 58 to 75 itches; mottled white (1 OYR 8/1) and very pale brown (1 OYR 7/4) fine sand; single grained; loose; moderately acid; gradual wavy boundary. C2--75 to 78 inches; very pale brown (I OYR 8/3) fine sand and loamy fine sand; single grained; loose; moderately acid. TYPE LOCATION: New Hanover County, North Carolina; Wihnwngton, 0.5 mile south of Dawson and Sixteenth Streets on west side of Sixteenth Street road bank. RANGE IN CHARACTERISTICS: Solum thickness is 35 to more than 60 inches. Reaction ranges from very strongly acid to slightly acid, unless limed. Some pedons have extremely acid A and E horizons. The A or Ap horizon has hue of 1 OYR to 2.5Y value of 4 to 6, and chroma of 1 or 2 or is neutral with 1 of 1/12120094:16 P Official Series Description- BAYMEADB Series http://ww%v2.fhv.iircs.usda.gov/osd/dat/B/BAYNEADE.litr value of 4 to 6 with common clean grams that are white or fight gray. Texture of the A horizon is sand, fine sand, loamy sand, or loamy fine sand. The E horizon.has hue of 1 OYR or 2.5Y, value of 4 to 8, and chroma of 1 to 6 or is neutral with value of 6 to 8. Texture is sand, fine sand, loamy sand, or loamy fine sand. The Bh portion of EBh horizon or Bh horizon, where present, is granular to massive with hue of 5YR to 1 OYR, value of 3 to 7, and cluoma of 2 to S. The E' horizon, where present has hues of 7.5YR to 2.5Y, values of 4 to 8, and chroma of 2 to 6 or it is neutral with values of 6 to 8. It is sand, fine sand, loamy sand or loamy fine sand. The Bt horizon has hue of 7.5YR to 2.5Y, value of 5 to 7, and chrome of 4 to 8. Mottles are in shades of yellow, brown, or gray at depths below'25 inches in some pedons. A gay matrix may be present in the lower Bt horizons of some pedons. Texture is commonly sandy loam or fine sandy loam but some pedons are sandy clay loans. The lower Bt horizon may occur as lamella of sandy loam. The BC horizon has.hue of 7.5YR to 2.5Y, value of 5 to 7, and chroma of 2 to 8. Mottles are in shades of yellow, brown, or gray in some pedons. Texture is loamy sand, loamy fine sand, sandy loam, fine sandy loam or in some pedons sandy clay loam. Tine C horizon has hue of 7.5YR to 2.5Y, value of 5 to 8, and chroma of 1 to 8 or is mottled in shades of these colors. Texture is sand or fine sand or stratified sandy, loamy, or clayey material. Some pedons have thin discontinuous Bh bodies in the C horizon. COMPETING SERIES: Ailey. Blaney, Chipola, Chisolm Coosaw, Garcon, Gomery Kenansville Remlik, Tenaha Tomahawk Uchee, and Valhalla in the same family. Closely related soils are the Alaga, Eustis, Kureb Onslow, Seagate, Waeram, and Wakulla series. All of these soils except Kureb lack irregular intermittent Bh bodies in the EBh horizon. Kureb soils lack argillic horizons. Onslow soils lack an arenic epipedon and contain gray mottles indicative of wetness in the Bt horizon. Seagate and Valhalla soils have continuous Bh horizons. Seagate soils have poorer drainage. GEOGRAPHICSETTING: Baymeade soils occur on broad, gently sloping surfaces of the lower Coastal Plain, generally above 20 feet. Slopes range from 1 to 12 percent. They formed in (stratified) interbedded sandy and loamy Coastal Plain sednnents. The mean annual precipitation ranges fiom 47 to 60 inches and mean annual temperature ranges from 53 to 74 degrees F. GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Kureb and the Blanton, Foreston Goldsboro. Lakeland Leon, Norfolk and Rimini series. Blanton soils have a Grossareiric epipedon. Foreston, Goldsboro and Norfolk lack an arenic epipedon. Lakeland soils lack fight gray E horizons and an argillic horizon. Leon and Rimini soils have continuous Bh horizons, and the Leon soils have poorer drainage. DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderately rapid permeability. Measured watertable levels at two sites show that the water table is 45 to 60 inches below the surface in December to April and other wet periods. USE AND VEGETATION: Most of these soils are in forest of mixed hardwood and pine. Native vegetation is turkey oak, long leaf pine, dwarfed huckleberry, small myrtle, wire grass, and astor. Large areas are in residential and urban uses in New Hanover County. DISTRIBUTIONAND EXTENT: Lower Coastal Plains of North Carolina and possibly South Carolina. v ,.r1 1/12/2009 4:16 F Official Series Description - BAYMEADE Series http://www.2.ffw.nres.usda.gov/osd/dat/B/BAYMEADE.hyr The series is extensive. MLRA OFFICE RESPONSIBLE: Raleigh, North Carolina SERIES ESTABLISHED: New Hanover County, North Carolina; 1973. REMARKS: Diagnostic horizons,and features recognized in this pedon are: Ochlic epipedon - the zone from the surface to a depth of 36 inches (the Ap and E horizons) Arent feature - the zone of sandy sediments from 0 to 36 inches.(the A, E, E/Bh horizons) Argillic horizon - the zone from a depth of 36 to 58 inches (the Bt and BC horizons) ADDITIONAL DATA: None TABULAR SERIES DATA: SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation NCO083 BAYMEADE. 0- 12 59- 63. 190-250 46- 57 20- 70 SOI-5 F1oodL F1oodH Watertable Kind Months Bedrock Hardness NCO083 NONE 4.0-5.0 APPARENT DEC -APR 60-60 SOI-5 Depth Texture 3-Inch No-10 ClaY% -CEC- NC0083 0-36 FS S 0- 0 100-100 0- 8 1-, 3 14CO083 0-36 LS LFS 0- 0 100-100 5-13 1- 4 N00083 36-49 FSL SCL SL 0- 0 100-100 8-26 2- 6 NC0083 49-78 LFS S SL 0- 0 100-100 0-12 0- 3 SOI-5 Depth -pH- O.M. Salin Permeab Slink -Sall NCO083 0-36 4.5- 6.5 .5-1. 0- 0 6.0- 20 LOW NCO083 0-36 4.5- 6.5 .5-1.. 0- 0 6.0- 20 LOW N00083 36-49 4.5- 6.5 0.-.5 0- 0 2.0- 6.0 LOW NCO083 49-78 4.5- 6.5 0.-.5 0- 0 6.0- 20 LOW National Cooperative Soil Survey U.S.A. 4 nr4 1 /12/2009 4:16 1 Official Series Description - FORESTON Series littp://www2.ftw.nrcs.wda.gov/osd/dat/F/FORESTON.htii LOCATION FORESTON SC+NC Established Series Rev. MHC 05/2008 EOKRUEST'ON SERIES The Foreston series consists of moderately well drained, moderately rapidly permeable soils that formed in marine sediment. These soils are on high ridges and slight rises within broad flat interstream divides of the Coastal Plain. Slopes range from 0 to 2 percent. TAXONOMIC CLASS: Coarse -loamy, siliceous, semiactive, thernvc Aquic Paleudults TYPICAL PEDON: Foreston fine sand --forested. (Colors are for moist soil.) A--O to 6 inches; very dark gray (I OYR 3/1) fine sand; single grain; loose; many fine roots and few medium roots; many clean sand grains; very strongly acid; abrupt wavy boundary. (4 to 9 inches thick) E--6 to 12 inches; very pale brovnn (1 OYR 7/3) fine sand; few fine faint brownish yellow (1 OYR 6/6) soft masses of oxidized iron; single grain; loose common fine and few medium roots; common clean sand grains; few worn casts; moderately acid; clear boundary. (0 to 12 inches thick) BE--12 to 17 inches; brownish yellow (1 OYR 6/6) loamy fine sand; few fine faint very pale brown (1 OYR 7/3) ion depletions; weak medium subangular blocky structure; very friable; few fine and medium roots; few clean sand grains; few very fine pores; moderately acid; clear smooth boundary. (0 to 7 inches thick) Bt1--17 to 26 inches; brownish yellow (1 OYR 616) fine sandy loam; common coarse faint brownish yellow (1 OYR 6/8) and few fine prominent yellowish red (5YR 5/6) soft masses of oxidized. iron; weak medium subangular blocky structure; very friable; few fine and medium roots; connmon very fine to fine pores; few clean sand grains; few strong brown nodules that crush with little pressure; strongly acid; clear smooth boundary. Bt2--26 to 33 inches; brownish yellow (1 OYR 6/6) fine sandy loam; few medium distinct light gray (1 OYR 7/2) iron depletions and few fine prominent yellowish red (5YR 5/6) soft masses of oxidized iron; weak coarse subangular blocky structure; friable; few fine and medium roots; commion fine pores; few lenses of white (1 OYR 8/1) clean sand grains; strongly acid; clear smooth boundary. (Bt is 12 to 40 inches thick) BE'--33 to 40 inches; light yellowish brown (I OYR 6/4) loamy fine sand; common medium faint light gray (1 OYR 7/2) iron depletions and few fine prominent yellowish red (5YR 5/6) soft masses of oxidized iron; weak coarse subangular blocky structure to massive; very friable; few fine roots; few fine pores; few fine lenses of white (I OYR 8/1) clean sand grains; strongly acid; gradual wavy boundary. (0 to 10 inches thick) E'--40 to 51 inches; light gray (1 OYR 7/2) clean fine sand about 38 percent, light gray (10YR 7/1) clean sand about 31 percent, and very pale brown (l OYR 7/3) coated sand about 30 percent. These colors t nfA 1/12/2009 4:16 P Official Series Description-:FORESTON Series littp://www2.ftw.nrcs,mda.gov/osd/dat/F/FORESTON.litn occur as large pockets and vertical streaks with few fine distinct strong brown (7.5YR 5/8) soft masses of oxidized iron within the streaks and pockets; few lenses and streaks of white (l OYR 8/1) clean sand grains; single grain; very friable; few fineroots; few f ne,pores; strongly acid; gradual wavy boundary. (3 to 15`inches thick) B't--51 to 61 inches; mottled brownish yellow (1 OYR 6/6), gray (1 OYR 6/1) and yellowish red (5YR 5/6) fine sandy loam; weal: coarse subangular blocky structure; friable; slightly brittle in the brownish yellow part; few fine roots; common fine pores; strongly acid; -gradual wavy boundary. (5 to 15 inches thick) Big--61 to 85 inches; gray (10YR 6/1) fine sandy loam; connnon medium distinct brownish yellow (l OYR 6/6) and few fine prominent yellowish red (5YR 5/6) soft masses of oxidized iron; weals coarse prismatic structure; feiable; few fine roots; few fine pores; strongly acid; gradual wavy boundary: (0 to more than 20 incltes,thick) C--85 to 90 inches; mottled fight gray (1 OYR 7/1) and very.pale brown (I OYR 7/3) loamy fine sand; massive;. very friable; very strongly acid. TYPE LOCATION: Williamsburg County, South Carolina; 4.6 miles southeast on South Carolina Highway 512 from the intersection of U.S. Highway 52 in Cades, South Carolina; 0.1 mile southwest on South Carolina Secondary Highway 159; 0.2 mile south on field road; 33 feet northeast of road.. RANGE IN CHARACTERISTICS: Reaction is very strongly acid to slightly acid in the A and E horizon and very strongly acid or strongly acid in the Bt horizon. The A or Ap horizon has hue of 1 OYR or 2.5Y, value of 3 or 4, and chroma of 1 or 2. It is sand, fine sand, loamy sand or loamy fine sand. The E and F horizons have hue of 10YR or 2.5Y, value of 5 to 7, and chroma oft to 4. Redox features of higher chroma are present in some pedons. In some pedons the F horizon is discontinuous and is mottled. It is sand, fine sand, loamy sand, or loamy fine sand. The upper Bt horizon has hue of 7.5YR to 2:5Y, value of 5 or 6, and chroma of 4 to 6. Redox features in shades of red, yellow, and brown are present in some pedons and gray iron depletions are within 30 inches of the surface. It is sandy loam or fine sandy loam with less than 20 percent silt. Some pedons have a thin subhorizon that is sandy clay loam. Many pedons contain lenses and pockets of clean sand. Some pedons have a few nodules of plinthite. The B't horizon has line of 7.5YR to 2.5Y, value of 4 to 7, and chroma of 1 to 8. It has few to many redox features in shades of red, yellow, brown, and gray or it is mottled. It is sandy loam, fine sandy loam or sandy clay loam. The C horizon has line of 7.5YR to 2.5Y, value of 4 through 8, and chroma of 1 through 8 or it is mottled without a donrinant matrix color. It is fine sand, sand, loamy fine sandy, fine sandy loam, sandy clay loam, sandy loam, or sandy clay and in some pedons it is stratified with these textures. COMPETING SERIES: (This section has not been reviewed; 4/8/98) These are the Dallardsville and Harleston series in the same fannily and the Dragston ]ohms, Nansemond, Olanta, Pactolus, Rumford, Sequatche, and Whitwell series in sini lar families. Dallardsville soils have tongues of albic material in the B horizon. Harleston soils contain more than 20 percent silt fit the particle -size control section. Dragston are aquults..Johns and Wltitwell soils are fine:loamy. Nansemond soils do not have secondary Bt horizons within 60 inches. Olanta, Rumford, and Seouatchie soils do not have mottles of chroma 2 or r n 1 /12/2009 4:16 ! Official Series Description - FORESTON Series http://wwiv2.fLw.nrcs.usda.gov/osd/dat/F/FORESTON.htiT less within 24 inches of the top of the argillic horizon. Pactolus soils are sandy throughout. GEOGRAPHIC SETTING`: Foreston soils are on nearly level slopes in the Coastal Plain. The soil formed in loamy marine seduvents. Near the type location the mean annual temperature is 64 degrees F., the average annual rainfall is 48 inches, and the frost -free season is about 228 days. GEOGRAPHICALLY ASSOCIATED SOILS: These are the Autrvville, Bonne au Chiso Dothan, Fuguay, Goldsboro Kahnia Leon, Lynchbura Lynn Haven, Norfoll Ocilla, Paxville, Rains, Rutleye, and Wagram soils. The Autryville, Bonneau, Clrisohn, Dothan, Fuquay, Norfollc, and Wagrann soils are in slightly higher positions on the landscape,aind are better drained. In addition, these soils, except for Dothan and Norfollc, are arenic. They all have fine -loamy Bt horizons. The Goldsboro soils are in a similar position on the landscape, but they are fine -loamy. Lynchburg, Ocilla, Paxville and Rains soils are in slightly lower positions on the landscape and are more poorly drained and have fine -loamy Bt horizons. Leon, Lynn Haven and Rutlege soils are in the lowest position on the landscape, are more poorly drained, and are sandy throughout. DRAINAGE AND PERMEABILITY: Moderately well drained. Surface runoff is slow. Permeability is moderately rapid. USE AND VEGETATION: Most areas of these soils have been cleared and are cropped to com, cotton, tobacco, soybeans, and hay crops. Vegetation of forested areas include various species of pine with mixed hardwoods. DISTRIBUTION AND EXTENT: Coastal Plains of Alabama, Georgia, Florida, North Carolina, South Carolina, and Virginia. These soils are of moderate extent. MLRA OFFICE RESPONSIBL7 : Raleigh, North Carolina SERIES ESTABLISHED: Clarendon County, South Carolina; 1972. REMARKS: Diagnostic horizons recognized in this pedon are: Ochric epipedon--fioiin 0 to 6 inches, Albic horizon --from 6 to 12 hnches and from 40 to 51 inches. Argillic horizon --from 17 to 26 inches and from 51 to 85 inches. ADDITIONAL DATA: None. TABULAR SERIES DATA: SOI-5 Soil Name Slope Airtemn FrFr/Seas Precip Elevation SCO044 FORESTON 0- 2 62- 66 230-260 42- 50 40- 170 SOI-5 FloodL F1oodH Watertable Kind Months Bedrock Hardness SCO044 NONE 2.0-3.5 APPARENT DEC -APR. 60-60 SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- SCO044 0-12 S ITS 0- 0 100-100 2- 8 1- 3 SCO044 0-12 LS LFS 0- .0 100-100 5-12 1- 4 SCO044 12-40 SL FSL 0- 0 100-100 10-18 2- 4 S00044 40-51 LFS LS FS. 0- 0 100-100 4-12 1- 2 SCO044 51-85 SL SCL 0- 0 100-100 10-35 2- 5 7 „ra 1/12/20094:16 P Official Series Description- FORESTON Series llttp://www2.flw.nrcs.usda.gov/osd/dat/F/FORESTON.litu SOI-5 Depth -pH- O.M. Satin Permeab Shnk-Shill SC0044 0-12 4.5- 6.5 .5-2. 0- 0 6.0- 20 LOW SC0044 0-12 4.5- 6.5 .5-2. 0- 0 6...0- 20 LOW' SCO044 12-40 4.5- 6.0 .5-1. 0- 0 2.0- 6.0 LOW SC0044 40-51 4.5- 6.0 0.-.5 0- 0 6.0- 20 LOW SC0044 51-85 4.5- 6.0 0.-.5 0- 0 0.6- 2.0 LOW National Cooperative Soil Survey U.S.A. d of 4 1 / 12/2009 4:16 F