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HomeMy WebLinkAboutSW8010220_Historical File_20010723North Carolina Depprtlpent of Environment and Natural Resources Division of Water Quality Wilmington Regional Office Michael F. Easley, Governor William G. Ross, Jr., Secretary July 23, 2001 Mr. Fred Odell, President Carteret General Hospital 3500 Arendell Street . Morehead City, NC 28557 AL NCDEN NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND N/7URAL RESOURCES Subject: Permit No. S W8 010220 Carteret General Hospital Additions and Renovations High Density Stormwater Project Dear Mr. Odell: Carteret County The Wilmington Regional Office received a complete Stormwater Management Permit Application for Carteret General Hospital Additions and Renovations on May 15, 2001. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. S W8 010220 dated July 23, 2001, for the construction of Carteret General Hospital Additions and Renovations. This permit shall be effective from the date of issuance until July 23, 2011, 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 fiiture 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 Linda Lewis, or me at (910) 395-3900. Sincerely, Rick Shiver Water Quality Regional Supervisor RSS/arl: S:1WQSISTORMWATIPERMIT1010220.JUL cc: Ron Cullipher, P.E. Town of Morehead City Building Inspections Division of Coastal Management Linda Lewis Wilmington Regional Office Central Files 127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer naner State Stormwater Management Systems, Permit No. SVV8 QW220 STATE OF NORTH CAROLINA OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY GH DENSITY DEVELOPMENT In accordance with the provisions of Artic 21 of Chapter 143, General Statutes ofNorth Carolina as amended, and other applicable Laws, Rules, and Regulata ns PERMISSIO IS HEREBY GRANTED TO General Hospital Carteret General Hospital Additions and Renovations County construction, operation and maintenance of 3 undergroun nfiltration trenches and 1 open infiltration basin in compliance with the provisions of 15A NCAC 2H .1000 (her er referred to as the "stormwater rules') and the approved stormwater management plans and specifications an other supporting data as attached and on file with and approved by the Division of Water Quality and considered art of this permit. This permit shall be effective from the date of issuance until July 2�, 2011 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 vol of of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of storm ter runoff as described on page 3 of this permit, the Project Data Sheet. The stormwater controls have bee designed to handle the runoff from 2,494 -ft2, 5,342 ftZ, 6,905 f1l, and 43,644ft2 of impervious area, respec ely.. The trenches and basin must be operated with a 50' vegetated filter. 3. Approved plans and specifications for this project are incorporated by reference a d are enforceable parts of the permit. 4. The tract will be limited to the amount of built -upon area indicated on page 3 of th4s permit, and per approved plans. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. A permit modification must be submitted and appXoved prior to the construction of additional built -upon area from outside of the approved drainage area. 2 State Stormwater Management Systems Permit No. SW8 010220 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 Carteret General Hospital Carteret General Hospital Additions and Renovations Carteret County FOR THE construction, operation and maintenance of 3 underground infiltration trenches and 1 open infiltration basin in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until July 23, 2011 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. 2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this permit, the Project Data Sheet. The stormwater controls have been designed to handle the runoff from 2,494 ft2, 5,342 ftZ, 6,905 ft2, and 43,644ft2 of impervious area, respectively. The trenches and basin must be operated with a 50' vegetated filter. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. A permit modification must be submitted and approved prior to the construction of additional built -upon area from outside of the approved drainage area. 2 State Stormwater Management Systems Permit No. SW8 010220 Project Name: Permit Number: Location: Applicant: Mailing Address: DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Carteret General Hospital Additions and Renovations SW8 010220 Carteret County Mr. Fred Odell, President Carteret General Hospital 3500 Arendell Street Morehead City, NC 28557 Application Date: May 15, 2001 Name of Receiving Stream/Index #: White Oak / Bogue Sound / 20-36-8.5 Classification of Water Body: "SA" Trench/Basin Number: Trench/Basin Depth, feet: Permanent Pool Elevation, FMSL: Drainage Area, acres: Total Impervious Surfaces, ft2: Offsite Area entering Pond, ft2: Required Storage Volume, ft3: Provided Storage Volume, ft3: Temporary Storage Elevation, FMSL: Type of Soil: Expected Infiltration Rate: Seasonal High Water Table Elevation: Time to Drawdown, hours: 1 2 3 4 1 1 1 2 23.4 23.4 23.4 23.4 0.14 0.15 0.20 1.26 2,494 5,342 6,905 43,644 None, per Engineer 356 682 885 5,736 435 802 1,103 7,579 24.4 24.4 24.4 25.4 Wando 4" per hour 21.4 2 2 2 7 c State Stormwater Management Systems Permit No. SW8 010220 II. SCHEDULE OF COMPLIANCE The stormwater management system shall be constructed in it's entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During const action, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of 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 outlet structure, orifice device and catch basins and piping. g. Access to the outlet structure must be available at all times. h. The vegetated filter will be kept grassed with no erosion. The spreader mechanism will be kept free of sediment and trash, and must distribute the runoff evenly over the width of the filter. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. Decorative spray fountains will not be allowed in the stormwater treatment system. 6. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. 8. if the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 9. A modification must be permitted prior to any construction. The following items will require a modification to the permit. The Director may determine that other revisions to the project should require a modification to the permit: 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 the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. 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. 4 State Stormwater Management Systems Permit No. SW8 010220 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. If the proposed BUA exceeds the pemitted amount, a modification to the permit must be submitted and approved prior to construction. 12. Prior to the sale of any portion of the property, an access/maintenance easement to the stormwater facilities shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale of any portion of the property. 13. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon area. 14. 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. 15. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. III. GENERAL CONDITIONS This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Permit issued this the 23rd day of July, 2001. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Kerr T. Stevens, Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 010220 E State Stormwater Management Systems Permit No. SW8 010220 Carteret General Hospital Additions and Renovations Stormwater Permit No. SW8 010220 Carteret County Designer's Certification I, , as a duly registered the State of North Carolina, in having been authorized to observe (periodically/weekly/full.time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best ofmy abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL 6 State Stormwater Management Systems Permit No. SW8 010220 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. If the proposed BUA exceeds the pemitted amount, a modification to the permit m st be submitted and approved prior to construction. 12. Prior to the sale o y portion of the property, an access/maintenance easement to the stormwater facilities shall be granted in vor of the permittee if access to the stormwater facilities will be restricted by the sale of any portion of the roperty. 13. The permittee is respon 'ble for verifying that the proposed built -upon area does not exceed the allowable built -upon area. 14. The Director may notify the ermittee when the permitted site does not meet one or more of the minimum requirements of the permit. WX11in the time frame specified in the notice, the permittee shall submit a written time schedule to the Director I r modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans d certification in writing to the Director that the changes have been made. 15. The permittee shall notify the Divis%pn of any name, ownership or mailing address changes within 30 days. III. GENERAL CONDITIONS This permit is not transferable. In the ev6pt there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a fo al permit request must be submitted to the Division of Water Quality accompanied by an application fee, ocumentation from the parties involved, and other supporting materials as may be appropriate. The appro of this request will be considered on its merits and may or may not be approved. 2. Failure to abide by the conditions and limitatio s contained in this permit may subject the Permittee to enforcement action by the Division of Water Q ity, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Pe 'ttee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by o er government agencies (local, state, and federal) which have jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, 'ncluding the creation of nuisance conditions, the Permittee shall take immediate corrective action, includ g those as may be required by this Division, such as the construction of additional or replacement storm ter management systems. .5. The permittee grants DENR Staff permission to enter the plperty for the purpose of inspecting all components of the permitted stormwater management facility. \ 6. The permit maybe modified, revoked and reissued or terminated N cause. The filing. of a request for a permit modification, revocation and reissuance or termination does n t stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the guidelines established in the North Carolina Erosion and Sediment C Permit issued this the 23rd day of July, 2001. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMIS l"p'.. r- t/ et L o&.A &per Kerr T. Stevens, Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 010220 water control must follow the Planning and Design Manual. 5 State Stormwater Management Systems Permit No. SW8 010220 Certification Requirements: .1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3 . All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. The outlet/bypass structure elevations are.per the approved plan. 5. The outlet structure is located per the approved plans. 6. Trash rack is provided on the outlet/bypass structure. 7. All slopes are grassed with permanent vegetation. 8. Vegetated slopes are no steeper than 3:1. 9. The inlets are located per the approved plans and do not cause short-circuiting of the system. 10. The permitted amounts of surface area and/or volume have been provided. 11. Required drawdown devices are correctly sized per the approved plans. 12. All required design depths are provided. 13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 14. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DWQ Regional Office Town of Morehead City Building Inspector e OFF1Cl. USE ONLY .... r Date Received Fee Paid_ Permit Number State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This for►n may be photocopied for use as an original I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): Carteret General Hospital 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Fred Odell, President 3. Mailing Address for person listed in Item 2 above: 3500 Arendell ST. City:_ Morehead City, NC 28557 State: NC Zip:- 28557 Telephone Number: ( 252 ) 247-1616 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Carteret_ General Hospital 5. Location of Project (street address): 3500 Arendell Street City: Morehead City, NC 28532 County: Carteret 6. Directions to project (from nearest major intersection): From the intersection of Hwy 24 and Ilwy 70 (Arendell St.), travel east on Hwy 70 until reaching 35th Street. The hospital will then be on the left. 7. Latitude: N34°43.56' Longitude: W76045.31' of project 8. Contact person who can answer questions about the project: Name: Mr. Fred Odell Telephone NLimber: ( 252 ) 247-1616 II. PERMIT INFORMATION: 1. Specify whether project is (check one): X New Renewal ModiflcatIon Form SWU-101 Version 3.99 Page I oi'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 x_High Density Redevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): CAMA Major X Sedimentation/Erosion Control _404/401 Permit _NPDES Storrnwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Stormwater will be treated through infiltration (underground piped trenches and a infiltration basin) 2. Storrnwater runoff from this project drains to the White Oak 3. Total Project Area: 2.3 acres 5. How many drainage areas sloes the project have? 4 River basin. 4. Project Built Upon Area: 58.3 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basin Information : .. ... . - :L)xainage Area° 1 Drainage Area 2 Receiving Stream Name Bogue Sound Bogue Sound Receiving Stream Class SA SA Drainage Area 6000 SF 6462 SF Existing Impervious* Area Proposed Irpervious*Area 2494 SF 5342 SF % Impervious* Area (total) Impervious*uifaice Area. Prainage Area 1 Drainage`Area .: On -site Buildings On -site Streets On -site Parking 2024 SF 4667 SF Orr -site Sidewalks 470 SF 675 SF Other on -site Off -site Total: 2494 SF Total: 5342 SF Impervious area is defined as the built upon aira including, but not Iiinited to, buildings. roads, parking areas, sidewalks, gravel areas, etc. Form SWU-I01 Version 3.99 Page 2 of Drainage Area Summary Usin tr&rrrvtrc Aria 3 Drarne Area 4 Receiving Stream Name Bogue Sound Bogue Sound Receiving Stream Class SA SA Drainage Area 8624 54871 Existing Impervious* Area 0 0 Proposed Impervious" Area 6905 43644 % Impervious" Area (total) 80.10% 79.54% ,mp iow; Surface Dmaage Area 3 Crai _ Area 4 On -site Buildings 19752 On -site Streets On -site Parking 6705 23112 On -site Sidewalks 200 780 Other on -site Off -site Total :6905 Total:43644 7. How was the off -site impervious area listed above derived? N/A r IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. 1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 2. No more than square feet of any lot shall be covered by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decking or the water surface ofswinrming pools. 3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of the permitted amount requiros a state stormwater management permit modification prior to construction. 5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall Include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Perunits Unit at (919) 733-5083 for the status and availability of these forms. Form SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SW U- I06 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench'Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement Form S W U-101 Version 3.99 Page 3 of 4 VI. SUBMITTAL REQUIREMENT'S Only complele application packages will be accepted and reviewed by the Division of -Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. 1. Please indicate that: you have provided the following required information by initialing in the space provided next to each item. • Original and one col.�y ofthe Sl:ormwater Management .Permit: Application Form 12A�als On(, copy of the applicable Supplement Form(.) for each BMP • Permit application processing fee of $420 (payable to NCDENR) • Detailed narrative description of stormwater treatment/management • Two copies of plans and specifications, including: - Development/Project name - Engineer and firm -Legend North arrow Scale Revision number & date Mean high water line Dimensioned property/project boundary - Location map with named streets or NCSR numbers - 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 sues, runoff calculations Drainage areas delineated Vegetated buffers (where required) VIL AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf. please complete this section. Designated agent (individual or firm): Stroud Engineering, P.A. Mailing Address: 151-A Hwy 24 City:_ Phone: Morehead City 252 ) 247-7479 VIII. APPLICANT'S CERTIFICATION State: NC Zip: 28557 Fax: ( 252 ) 247-4098 1, (print or type name ofperson listed ill General Information, item 2) Mr. Fred Odell, President certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A NCAC 2H .1000.jt�s_' , O ,� Date: "'7- Form S W U-101 Vcrsion 3.99 Page 4 of 4 Permit No. a) 9 ()/()Z?lo (to be provided by D 1YQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM UNDERGROUND INFILTRATION TRENCH SUPPLEMENT TNs form may be photocopied for use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an underground infiltration trench supplement for each system, design calculations, and plans and specifications showing all stormwater conveyances and system details.. 1. PROJECT INFORMATION Project Name : Carteret General Hospital. Contact Person: Fred Odell, President . Phone Number: (252 ) 247-1616 For projects with multiple infiltration systems, a supplement form must be completed for each system. This worksheet applies to: Trench Infiltration #1 in Drainage Area 1 (/'roan plane) 0i•0111 form ,SWLI-1 U1) If. DESIGN INFORMATION (attach supporting calculations/documentation): Soils Report Summary (base(/ upon an actual field investigation and soil borings) Soil Type Wando Infiltration Rate 4-12 tin/hr�or-e€tWisf (circle appropriate units) SHWT Elevation 21.4 finsl (Seasonal High Water Table elevation) Trench Design Parameters Design? V'0111me Design Storm Drawdown Time Perforated Pipe Size Perforated Pipe Length No. Observation Wells Stone Type (if used) Stone Void Ratio 353 c.f. 1.5 inch event (1.5 inch even/for SA waters, I inch event for others) 0.11 days 12 inch diameter ,41 f ?�+'� ft. 121'3�- N/A (may be required on a case-bi,-case basis) , 417'b' Trench Elevations (in feet mean sea level) Bottom Elevation 23.4 finsl Storage/Overflow Elevation 24.4 _ fmsl Form SWIJ-IU7 Rcv 3.99 Pate I of 4 Trench Dimensions 12" CMP (@) S,O.c. Fer-t &_rich ' y I ` Ueight 12" -GNP- -ft. Length ft. Width ft. Volume Providedcu.ft. sq f It a .�7Z Cr Ill. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Hcalth and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. if the applicant has designated an agent in the Stornwatcr Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Aoolicants Initials System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. c. Off-line system, runoff in excess of the design volume bypasses the system (bypass detail provided). f System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogeologic evaluation may be required). g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour. h. System is not sited on or in fill material or DWQ approval has been obtained. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaceing to the system, including any off -site drainage. (-BbarwAZatcd in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. �fL_ I. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event �for areas draining to SA waters ). yy�� I[ 6 in. Drainage area for the device is less than 5 acres. NC r , n. A preh•-atment device ( filter strip, grassed Swale, sediment trap, etc.) is provided. t�l-'S S"i itottom is covered with a layer of clean sand to an average depth of 4 inches. C p. Sides of the infiltration trench are lined with geotextile fabric. q. Rock used is free of fines (washed stone) and has a large void ratio. r. Side to bottom area ratio is less than 4:1. Dorm SWU-107 Rev 3.99 Pap 2 of 4 N' s. Observation well(s) are provided (case -by -case basis). t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and detail is shown on plans u. A benchmark for checking sediment accumulation is provided. 1V. UNDERGROUND INFILTRATION TRENCH. OPERATION AND MAINTENANCE AGREEMENT l . Auer every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system performance. 3. Remove accumulated sediment annually or when depth is reduced to 75%, of the original design depth. Restore depth to original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced curd may compromise the ability of the system to perform as designed. 4. The water level in any monitoring wells will be recorded alter a 1 inch rainfall event and at least once a month. Chronic high water table elevations (within l foot of the bottom of the system for a period of three months) shall be reported to DWQ immediately. I l' DWQ determines that the system is failing, the system will immediately be repaired or replaced to original design specifications. ll'the system cannot be rcpair�d to perform its design function, other stormwater control devices as allowed by NCAC 21-1 .1000 must be designed, approved and constructed. 6. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced to 75%, of the original design depth. The system shall be restored to the original design depth without over - excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the infiltration system. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the depth at the benchmark reads 1.88 , the accumulated sediment shall be removed from the system. Cuuucuuu ayawu► u► aCCURIWICC With the six maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Fred Odell. President Address: 3500 Arendell Street Morehead City, NC 28557 Phone: 252 247-1616 Date: 02/08/01 Signature: — r Note: The legedly rea/mrsihle hartP should not be a homeo►rners association unless more than ill% of the Ws have heen sold and a resident q/'the Subdivision has been named the president. I��';Ie' , a Notary Public for the State of VC , County of do hereby certify that E A &I , 2=7 personally appeared before me this day of A00 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, SEAL` My commission expires �' 1 ��00j- I'-orm SWU-107 Ilev 3.99 Page 4 of 4 (u) uc provrueu on Lill V) State of North Carolina S60 g 0/0 ZZb Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM UNDERGROUND INFILTRATION TRENCH SUPPLEMENT .... _ ..... This Lunn maybe p otocepled fai• use as an o►igiisal DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an underground infiltration trench supplement for each system, design calculations,and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name: Carteret General Hospital Contact Person: Fred Odell Phone Number: L252 ) 247-1616 For projects with multiple infiltration systems, a supplement form must be completed for each system. This worksheet applies to: Trench Infiltration #3 in Drainage Area 3 (%rwn plans) (/i•om Eorm SiVU--101) 11. DESIGN INFORMATION (attach supporting ctslct.iiaticins/docunciitatioh): Soils Report Summary (hosed upon an actual field.invavigalion a ndsoil borings) Soil Type Wando......... Infiltration Rate 4-12 rin/hf or.c gwkf (circle appropriate units) SHWT Elevation 21.4 finsl (Seasonal High Water Table elevation) Trench Design Parameters Design Volume 884 C.f. Design Storm 1.5 inch event (1.5 inch event fur SA waters, 1 inch evenl.for• other.~) Drawclown Time 0.11 days Perforated Pipe Size 12 inch diameter Perforated Pipe Length No. Observation Wells N/A (may be required on a cast? -lie -case basis) Stone Type (if used) AKA 57. __In Stone Void Ratio • �' } Trench Elevations (in feel man sea level) Bottom Elevation 23.4 Storage/Overflow Elevation.. 24.4 finsl Dorm ti\VU-107 Rev 3.91) Pain 1 or 4 Trench Dimensions 12" CMP ® 3` ® -G Hcighl 12" -@MP► ft. W idth 111. REQUIRED ITEMS CHECKLIST * Per -i-t-eKc k 0- Length Volume Provided .- _ Zu.ft. 94 y CF ky�2- The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Applicants Initials "--/( I a. System is located 50 feet from class SA waters and 30 feet from other surface waters. 0C b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. VO( d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. �?_06 c. Off-line system, runoff in excess of the design volume bypasses the system (bypass detail provided).- f System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogeologic evaluation may be required). J41� g. Soils havea. minimum hydraulic conductivity of 0.52 inches per hour. h: System is not sited on or in fill material or DWQ approval has been obtained. i. Plans ensure that the installed system will nice( design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. j. System is sized to take into account the runoff at the ultimate built -out potential from all surf s draining to the system, including any off -site drainage. WOO � lfec®� �.� . 1�� k. ystcn is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right -or -way. 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). m. Drainage area for the device is less than 5 acres. n. A Ip treatment device ( filter strip, grassed swale, sediment trap, etc.) is provided. ls"h enc1i bottom is covered with a layer of clean sand to an average depth of 4 inches. l �nC p. Sides of the infiltration trench are lined with geotcxtile fabric. q. Rock used is free of fines (washed stone) and has a large void ratio. �f V 14 s. Observation well(s) are provided (case -by -case basis). t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and detail is shown on plans. u. A benchmark for checking sediment accumulation'is provided. IV. UNDERGROUND INFILTRATION TRENCH. OPERATION AND MAINTENANCE AGREEMENT After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system performance. 3. Remove accumulated sediment annually or when depth is reduced to 75%, of the original design depth. Restore depth to original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. 4. The water level in any monitoring wells will be recorded after a I inch rainfall event and at least once a month. Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months) shall be reported to DWQ immediately. 5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. 6. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over - excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the infiltration system. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. . When the depth at the benchmark reads 1.88 , the accumulated sediment shall be removed from the system. Dorm SwU-107 Rev :.99 Page 3 of 4 I acknowledge and ::agree by my signature below that I am responsible for maintaining the storniwater collection system in accordance with the six maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible patty. Print Name and Title: Fred Odell, President Address: 3500 Arendell Street Morehead City, NC 28557 Phone: (252) 247-1616 Date: O2/O8/01 Signature: Noce: The legrrlhf reaponsihle pcu Ip shoald not he a homeowners association. artless ►►tore than 50% of the lots have. been sold and a resident of the subdivision has been named the pr•eident. a Notary Public for the State of /V � , County of ry do hereby certify that 7: :`I • OJ i —EZr-- personally appeared before me this day of 4,.QJ/) , 0 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, SEAL My commission expires 9- / 1 a Ow - Form SWU-107 Rev 3.99 .Page 4 of 4 (to oc pro1Vdea OV L.)ll LI/ State of North Carolina SW LT 0/0 zoo Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM UNDERGROUND INFILTRATION TRENCH SUPPLEMENT This forrn may Ix- photocopied for use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an underground infiltration trench "supplement for each system, design calculations, and plans and specifications showing all stormwater conveyances and system details. 1. PROJECT INFORMATION Project Name: Carteret General Hospital Contact Person: Fred Odell, President . Phone Numbee: ( 252 ) 247-1616 For projects with multiple infiltration systems, a supplement form must be completed for each system. This workshect applies to: Trench Infiltration #2 in Drainage Area 2 (Iron plans) (fi-om foorm SWU-101) [I. DESIGN INFORMATION (attach supporting calculations/documentation): Soils Report Summary (bused upon an aetual.fielcl inyestigalion und.soil borings), Soil Typc- Waiido Infiltration Ratc 4-12 in/hr r off (circle appropriate slits) SHWT Elevation 21.4 msl (Seasonal High Water Table elevation) Trench Design Parameters Design Volume 679 c.f. Design Storm 1.5 inch event (1.5 inch event for SA waters, 1 inch event for others) Drawdown Time 0.11 days Perforated Pipe Size 12 inch diameter Perforated Pipe Length t&65 478 ft. 0' No. Observation Wells N/A Stone Type (if used) 57 W, Stone Void Ratio -Nf'A Q -AY.\, Trench Elevations. (in f['el jnean sea level) Bottom Elevation 23 •.4 ; : °filisl Storage/Overflow Elevation 24..4 fimsl (inay be required on a cast}-br•-case basis) I arm SWU-IU7 Itry 3.99 Page I of 4 Trench Dimensions 12" CMP & ?vf O.G. Height 12" 4R"— ft. Width T/:. ft..... all Ill. REQUIRED ITEMS C.l-IECKLIST s/fq Io Length Volume Provided .9,0& (o-b ft. ,7-11- r (fib. cF 5 114 /o f The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Ap �licants Initials rVnCi a. System is located 50 feet from class SA waters and 30 feet from other surface waters. WLb. System is located at least 100 feet from water supply wells. c c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. c. Off-line system, runoff in excess of the design volume bypasses the system (bypass detail provided). f System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogcologic evaluation may be required). g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour. h. System is not sited on or in fill material or DWQ approval has been obtained. l� i. Plans ensure that the installcd system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. j. System is sized to take into account the runoff at the ultimate built -out potential from all C�ru -aye draining to the system, including any off -site drainage. k. System is located in a recorded drainage casement for the purposes of operation and maintenance and has recorded access casements to the nearest public right-of-way. 1. System captures and infiltrates the runoff .from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). in. Drainage area for the device is less than 5.acros. n. A prq,.trcatmcnt device ( filter strip, grassed swale, sediment trap, etc.) is provided. qriA bottom is covered with a layer of clean y sand to an average depth of 4 inches. L p. Sides of the infiltration trench are lined with gcotcxtilc fabric. OnC�— q. Rock used is free of fines (washed stone) and has a large void ratio. q)q s. Observation well(s) are provided (case -by -case basis). t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and detail is shown on plans. 1�'/✓� u. A benchmark for checking sediment accumulation is provided. ' IV. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT Alter every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system performance. 3. Remove accumulated sediment annually or when depth is reduced to 751/o of the original design depth. Restore depth to original design depth without over -excavating. Over -excavating may cause the required water table separation, to be reduced and may compromise the ability of the system to perform as designed. 4. The water level in any monitoring wells will be recorded alter a l inch rainfall event and at least once a month. Chronic high water table elevations (within 1 root of the bottom of the system for a period of three months) shall be reported to DWQ immediately. 5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original design specifications. I f the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 21-1 .1000 must be designed, approved and constructed. 6. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over - excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the infiltration system. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the depth at the benchmark reads 1.88 , the accumulated sediment shall be removed from the system. cu►►ccuu" ,yaw" In accoruance with the six maintenance procedures listed above. I agree to notify.DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Fred Odell President Address: 3500 Arendell StreetMorehead City, NC 28557 , Phone: (252_ 247-1616 Date: O2/O8/01 Signature: N(JIC: The le;�'u11J7 retipnnsihlc hurh'should nvl lie a horrrcyr►cne►a association unto s more than 50 o%Iher lots have heren sold aml a r esklent of the subdivision has been named the president. I• �L�� re , a Notary Public For he Stale of,Count of ��JJ y do hereby ccrlil'y that. fT �, personally appeared before me dus day of — ,and acknowledge the due execu ion ofthc forgoing infiltration basin maintenance A rcquirenicnis. Witness my hand and official seal, SEAL. My commission expires Form S W U-107 Itcv i.99 Page 4 or 4 sm S K I N A E R L A M M 8� H I G'H S 1T,H; PA ARCNITECTS- 702 WEST BROAD ST. POST OFFICE BOX 669 WILSON, NC 27894-0669 252 291 4'1 27 FAX 252 291 1070 m REVISIONS:" - j. GYT 3126l01 (SW COMMENTS) J Q �s W R, 1s W rr. � ,! ,if... � v. : '+.�- s - j - } { U r __ r r r -f OUNDRY ICOMPANY N 1 i A _ r4 .. - g 1 .. . L MA-"' ..., =rr .. ., �,:..: - •. v _... :. ,b :::. .. ' ... a :�: <', .,. _ .'•. ,.. vh P b s r . `B Y ■ I I I f�l I I I I F t i¢ I d a }LLJ1 ! � '.. p is : 0 i i tu, SUMP DEPRESS * € N k v j Narrative Erosion and Sedimentation Control Plan Stormwater Management Plan Carteret General Hospital February 6, 2001 Owner: Carteret General Hospital Fred Odell, President 3500 Arendell Street Morehead City, NC 28557 (252) 247-1616 Engineer: Stroud Engineering, P.A. 151-A Hwy 24 Morehead City, NC 28557 A. Description of Project 1. Type of Development RECEIVED FEB 14 2001 DWQ PROJ # ZZV Carteret General Hospital is proposing a major addition to the existing hospital, located in Morehead City. This project will encompass an expansion as well as parking adjustment to accommodate the addition. 2. Earth Disturbing Activities a. Demolition, excavation and grading for the installation of drainage and utility improvements. b. Grading for the construction of proposed buildings and parking. 3. Drainage The site presently drains to the south and eventually to Bogue Sound, which is Class SA. Prior to leaving the site, the first one-half inch of rainfall will be treated by an infiltration basin and piped infiltration trenches. The excess volume will be treated at the southern end of the property by sheet flowing along existing grade to an existing drop inlet located at the intersection of 35`h and Arendell Streets. File: pin] 127nandoc B. Erosion and Sedimentation Control Measures The following measures are proposed for the site. If it becomes evident that additional erosion and sedimentation control measures are needed, they shall be installed immediately. It is intended that all grading and excavation activities within a certain area will be protected as soon as that activity is complete. 1. Sediment Fence — Sediment fence will be utilized as necessary in locations as shown on plans or as deemed necessary by the engineer to insure that off -site sedimentation is controlled. 2. Seeding — All disturbed areas will be seeded within 14 days following construction in accordance with the seeding schedule shown on the plans. 3. Stone Construction Entrance — Stone construction entrance will be used to reduce transport of sediment off site. 4. Sediment Basin — Stonmwater infiltration basins proposed for the site may serve as a sediment trap, but must be cleaned of any debris following completion of construction. Proper care must be utilized to avoid disturbance of the basin area below elevation 23.4rmsl. 5. Riprap outlet protection — Riprap to be installed at locations shown on plans to reduce energy at high velocity areas. Maintenance Plan 1. All erosion and sediment control measures shall be checked for stability and effective operations following every runoff producing rainfall event or at least once per week. Repairs required shall be completed immediately to the dimension and functions indicated on the plans. 2. Sediment shall be removed form behind the sediment fencing when it becomes 0.5 feet deep at the fence. The fence shall be replaced or repaired as necessary to maintain a bar7ier. 3. All seeded areas shall be fertilized, seeded and mulched within 15 days of disturbance. Disturbed areas shall be fertilized, reseeded and mulched as necessary according to the Contract documents to establish and maintain a dense vegetative cover. C. Construction Schedule 1. Obtain plan and approval and other applicable pen -nits. 2. Initiate demolition, clearing and grubbing operations in applicable areas. 3. Install temporary gravel construction entrances. 4. Complete clearing and grubbing operations. 5. Install silt fencing at locations shown. 6. Rough grade site and construct infiltration basin. 7. Install subsurface utilities and drainage facilities. 8. Pave areas to be paved. File: pin 127nandoc 9. Pave areas to be paved with asphalt pavement. 10. After site is stabilized, remove remaining temporary measures and install permanent vegetation on disturbed areas. D. Design Assumptions 1. Design storm is ten years. 2. The rational method was used for the design. E. Infiltration Basin and Trench Operation and Maintenance 1. See application package. F. Coastal Stormwater Regulations The North Carolina Division of Environmental Management implemented coastal stonnwater regulations in coastal counties on January 1, 1988. These regulations are detailed in 15 NCAC 2H.1000 Stormwater Management. These rules allow for a development to be considered under various options. This project is submitted for approval consideration under Section .1008(d)(2). ZvRon=aldD. Cullipher ate File: pin 127nar.doe sew s V99 Ysue. DATE: October 25, 2000 At A 2sn RECEIVED FEB 14 2001 DWQ PROJ 504I& M 9� .7805 W1604AWA 90AKM^ ,NAB 040.7 SUBJECT: Land & soils evaluation of Carteret General Hospital Eastern Expansion Area for stormwater infiltration treatment usage. Tract along the western side of 351h Street, between Arendell Street and Bridges Street, Morehead City west area, Carteret County, North Carolina. TO: Carteret General Hospital c/o Mr. Ron Cullipher, P.E. Stroud Engineering Company, P.A. 101-A NC Hwy 24, Hestron Plaza Morehead City, NC 28557 (252) 247-7479 The land & soils within the Carteret General Hospital Eastern Expansion Area were evaluated to determine potential suitability for on -site stormwater treatment usage. NCDEH&NR "Stormwater Runoff Disposal" rules and regulations (NCAC 15-2H-.1000) were used as guidelines in making this evaluation. The proposed project is greater than 1 acre in size, will have >25% impervious surfaces, appears to drain to Bogue Sound in a southern direction to "Class S.A. waters". Being at this location typically requires the usage of infiltration basins, or an equivalent innovative/alternative method to treat stormwater run-off. Principle soil and site requirements for an infiltration system are: ---the infiltration system's bottom must be 2 ft or greater from the seasonal high water table; --must be capable of complete draw -down within 5 days; ---the soil's hydraulic conductivity must be 0.52 in/hr or greater. The area proposed for stormwater infiltration usage is an open yard area and also where portions of the existing parking will be redeveloped. Soil lines were extrapolated across paved areas, as no soil borings were taken within existing these areas. The tract has natural moderately well to excessively drained sandy soils. Topography is gently rolling with 0-3% slopes. Elevations across the tract are -22 - 26 ft (amsl, see survey). Water table levels appear to be between-20-21.5 feet in elevation, based upon soil wetness indicators and pending location. The enclosed land & soils map show the various land/soil types found (see soils map). Logged soil boring descriptions can be provided upon request. The following are brief descriptions of these land & soil types, detailed soil pit descriptions are attached: The "Green" Areas (see map) are natural sandy soils. These soils have an estimated seasonal high static water table +50-60 inches from the current ground surface (@-20-21 ft elev), based upon soil wetness indicators. Estimated permeability is <5-15 min/in (>4-12 in/hr). These soil types should be considered as usable for shallow placed infiltration stormwater systems, with bottoms -2 - 3 ft into the current ground surface. Soil types found are Wando-Urban phase. Typical soils are yellow -brown sand or loamy sand to 50-60" depths, and pale brown to light gray sand or loamy sand to 60-70" depths. Page 2. Carteret General Hospital, Stormwater Infiltration The "Yellow" �,.e. s (see map) are natural sandy soils. These soils have an estimated seasonai high static water table +40-50 inches from the current ground surface (@-21 ft elev), based upon soil wetness indicators. Estimated permeability is <10-15 min/in (>4-6 in/hr). These soil types should be considered as usable for ultra -shallow placed infiltration stormwater systems, with bottoms —1 - 2 ft into the current ground surface. Soil types found are Wando-Urban phase and Seabrook -urban phase. Typical soils are yellow -brown sand or loamy sand to 40-50" depths, and pale brown to light gray sand or loamy sand to 50-60" depths. The "Brown" Areas (see map) are natural sandy soils. These soils have an estimated seasonal high static water table +24-36 inches from the current ground surface (@-20-21 ft elev), based upon soil wetness indicators. Estimated permeability is <10-15 min/in (>4-6 in/hr). These soil types should be considered as usable for ultra -shallow placed infiltration stormwater systems with man-made sidewall berms and bottoms 0 -1 ft into the current ground surface. Soil types found are Seabrook -Urban phase and Leon -dry -Urban phase. Typical soils are yellow -brown sand or loamy sand to 24-40" depths, and pale brown to light gray sand or loamy sand to 50-60" depths. Soft non-restrictive hardpans (spodic horizons) may be encountered at +30" depths within these soil areas. The tract is composed of natural sandy soils with the major variance in soils being depths to the seasonal high static water table. The seasonal high static water table should be considered between —20 - 21 ft elevation. The seasonal water table level grades from north to south, which accounts its lower depths in the southern portions of the tract. The majority of the tract should be usable for stormwater infiltration usage, with careful placement of bottoms to allow a +2 ft buffer from seasonal static water table levels. NCDE&NR-DWQ Stormwater Section is the permitting agency for such treatment systems, and should be contacted for their reviews for final planning and permit application. C Af , Larry FBald . win, CP S/SC ARCPACS #2183; NCLSS #1040 LAND & SOILS MAP OF THE CARTERET GENERAL HOSPITAL EXPANSION AREA FOR ON -SITE STORMWATER INFILTRATION USAGE Morehead City West Area - Carteret County - North Carolina —.W%n as vfine' E)ftft Pad" Area i SCALE: 1 Inch = 80 Feet (soil tines paced & approx, no borings within existing paved areas) OCTOBER - 2000 1 Suitable soils for stormwater j infiltration usage. Est seasonal high static water table +50-60" (-20-21 ft elv). Est permeability 5-15 min/in k 4-12 inthr). Wando soil types. I Suitable soils for ultra -shallow ❑ (1-2 ft) storrnwater infiltration e usage. Est seasonal high static water table 40-50" 4 (-21 21.5 ft elv). Est permeability 10-15 minfin 4-6 in/hr). Wando and Seabrook soil types. n Provisionally suitable soils for I�--- -__ ' ----- PROJECT: Carteret General Hospital LOCATION: Carteret County RUNOFF CALCULA T IONS: RATIONAL METHOD: Q=CIA RETURN PERIOD: Tc: INTENSITY: RUNOFF COEFFICIENTS: 10 YEARS 5 MIN. 7.23 IN/HR 1 IMPERVIOUS AREAS 0.1 GRASSED AREAS AREA AREA IMPERVIOUS GRASSED Q10 DA AREAHER Cc (SF) (AC) S (SF) (CFS) ; 1 6000.00 0.14 2494.00 3506.00 0.47 0.47 2 6462.00 0.15 5342.00 1120.00 0.84 0.91 3 8624.00 0.20 6905.00 1719.00 0.82 1.17 4 54871.00 1.26 43644.00 11227.00 0.82 7.43 Total 75957.00 1.74 58385.00 17572.00 0.79 9.98 .JUU / STROUD ENGINEERING, P.A. SHEET NO. 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L .. . ....... IS-73 I DRAINAGE Ek SEWERAGE- HYDRAULIC COMPUTATIONS-51 a - Cros.5 - sectional For pipes full area of waferwoy — or half- full �o= wetted perimeter R D R = P =Hydraulic radius. SECTION OF ANC OPEN C"AWJEL SECTION OF CIRCULAR PIPE V =Average or rreon velocity in feel per second. Q = o V Discharge of pipe or channel in cubic feet per Second Cc. f s.). n = Coefficient of roughness ofpipe or channel sur/'oce , see Table A-G9./E-G8. 5 = Slope of Hydraulic Gradient (wafer surfoce in open cha,7ne/s or pipes 170t under Pressure, some ovs slope of ehonnel or piPe invert on/y when f/ow is uniform in conatont section. FIG. A— HYDRAULIC ELEMENT5 OF CHANNEL SECTIONS. 90 s0 7 W V a 60 v 3 50 O J LL 40 O = 30 Q U 20 Im 0 a c yc - _ .� aal�s � J locl O 10 20 30 An _50 Gn 7n Rn 4n inn un �e., HYDRAULIC ELEMENTS PER CENT OF VALUE FOR FULL SECTION (APPROXIMATE) EXAMPLE' Given: Discharge =/2 C. f. s. through a pipe which has capacity f/owiag full Of /5 c. f. s. of a veto city of 7.0 ff per sec. ,Pe9ai�d fo find h fnr Q = /2 c. f: s. o �ereer�foye of full discfiofye = T - 80% . Enter chart of 80% of mo/ue fnr fu//section of Hydroti/fc E/emei21s, flr7d Y=//2.57.x7=73 , / per sec. FIG.B-VALUES OF HYDRAULIC ELEMENTS OF CIRCULAR SECTION FOR V4RIOU4 OFPTHe, OF FI r)w Appendices NEW YORK DOT DISSIPATOR METHOD FOR USE IN DEFINED CHANNELS (Source: "Bank and channel lining procedures", New York Department of Transporiation, Division of resign and Construction, 1971.) Note: To use the following chart you must know: (1) Q full capacity (2) Qto (3) V full ` (4) Vlo where Q = discharge in cfs and V = Velocity in FPS. ESTIMATION OF STONE SIZE AND DIMENSIONS FOR CULVERT APRONS Step 1) Compute flow velocity Vo at culvert or paved channel outlet. Step 2) For pipe culverts Do is diameter. For pipe arch, arch and box culverts, and paved channel outlets, Do=Ao, where A: cross -sectional area of flow at outlet. For multiple culverts, use Do=1.25xDo of single culvert. Step 3) For apron grades of 10% or steeper, use recommendations For next higher zone. (Zones 1 through 6). 25 20 - 5- I I I I 10. 15' 20' 25 DIAMETER (Ft.) Figure 8.06.b.1 Rev. t2J93 8.06.5 0 W ? 2�WN MATERK F APRON TO PROTECT CULVERT L1 TO PREVENT SCOUR HOLE USE L2 ALWAYS L2 1 ISTONE FILLING (FINE) CL A 3 x Do 4 x Do 2 STONE FILLING (LIGHT) CL. B 3 x Do 6 x Do 3 STONE FILLING (MEDIUM) CL. 1 4 x Do 8 x Do 4 STONE FILLING (HEAVY) CL. 1 4 x Do 1 8 x Do 5 STONE FILLING (HEAVY) CL. 2 5 x Do 10 x Do 6. STONE FILLING (HEAVY) CL. 2 6 x Do 10 x Do 7 SPECIAL STUDY REQUIRED (ENERGY DISSIPATORS, STILLING BASIN OR LARGER SIZE STONE). Fig. 8.06.b.2 Width = 3 times pipe dia. (min.) DETERMINATION OF STONE SIXES FOR DUMPED STONE CHANNEL LININGS AND REVETMENTS Step 1) Use figure 8.06.b.3 to determine maximum stone size (e.g. for 12 Fps=20" or 550 lbs. Step 2) Use figure 8.06.b.4 to determine acceptable size range for stone (for 12 FPS it is 125-500 lbs. for 75% of stone, and the maximum and minimum range in weight should be 25-500 lbs.) Note: In determining channel velocities for stone linings and revetment, use the following coefficients of roughness: Diameter (inches) Mannin's "n" Min. thickness of lining (inches) Fine 3 0.031 9 12 Light 6 0.035 12 18 Medium 13 0.040 18 24 Heavy 23 0.044 30 36 (Channels) Missapatois) 8.06.6 Rev. IZ93 .JOB f STROUD ENGINEERING P.A. ; .SHEETNO. / Hestron Plaza Two °F- vj 151 A Hwy. 24 `.:OULATEDDY DINE o2��oz./Q/ MOREHEAD CITY, NC 28557 'r''CHECKED BY /�/d t (252) 247.7479 DATE ...�....,_...._... SCALE .` i I .1.. ............ .... .._ .... _........... ...._►._...... ...........I ...w ..w ............ ... I::: f .. a .E'si '•-r :� _... Y , :..1_...M� ._ A_ . ._ ..�............ ..J...... ., .. ,.'.. ' . _... r � s ^+ ......�..._ M ..1_. .P. tr �! 0 ._s.. ... ..�... ........ :3.. _a .F ................. 1 . U1 �..1 .. _, �.. _..... _ .. ._.� ...... + ... .. . _ ...r _ .... ..�.�...._'.... _. ._. _.. _ . . i ..... ... - _.�.... ... .. _ _�- .. ............_ _...j.......�..._...._.. _. _. »._ ._ �_V .._. .A��._.��'. .. . .....�._. _......... .... _..l... _.. ..1_ W �.. I �:._ _.�.._...._.. » .... .... ... ...... _. ...,._..... ,... _. _. . __� _... . ...... _. .. ... . mum . ........ ... 5J3 __.� d 3 .11 _L f MA 1 _ M.. _ .s_..._... 00 _...�.....I M -. _ ry 1- 111 �..w .mwi.... ,� GrN _ .. _..._..»... ENGINEERING P A Two, CAGClAJ1T D: . �MORE�IAD C NC.28557 ` j } " CHECKED BY CW 247-7479 .,.. a OK Vre ,E DATE - # . 4. UW • r _ - - ' ` j� " o• /q i. "�"� /� 7 � ►- � _� _.�. _a Wit_._. 77 -- - L ; - 3 f }} F, �. jj } a-LH ,� i. p '� �t �,..r � , � - j{ .1--'-••1«.«-ice__ _`.«j_'-'«.3•-.«.._..• - + �*oogcrtan�sr�aos�rrtiea�e .`: _� STROUR ENGINEERING, P.A. siirpo }Y r , Hes#ron Plaza i n ^6sM E jt • 1 i DATE s.f f x Y `CI OREHEADwNC 28557 9(252) 247-47< f c+trr �r 0r► ff 41 14 IM j 10 __. _.. Al _I-. - r i1 , i ' E STROUD ENGINEERING, P.A. .'Z Y Heitron Plaxa Two rt;{t rrl 15"1AHwy`24. MOREHEAD CITY; NC 28557 (252) 247-7479 - � _! i}—_,_._� i i i-_+__.__i�. i F. j. qI �i- . i � !� C,' 4�%'.•�r ul- ,11J tL _ZA& ---�----- _ ' • ��F 1 i � i i � � I i t 1 { +•COFICI FM•1 FAaY s�.a �......... l v , ( I , . t 4. i , i '.,- , , - .Jvil I .-. , & 1. I 1,. ) STROUD ENGINEERING, P.A. SHEETNO.- / 2 OF Hestron Plaza Two f►t1st of 151 A Hwy. 24 CALCULATEO Y / x Oki MOREHEAD CITY NC 28557 Q '' ': CHECKED Y (252) 247-747Aff 07j Al% /v SCALE = i Q : i I ! •I 'Ag b ' ../tS I �_.�.�....�i.V.t.. _ _.. _�1K..jI_],G.... _. ... V• ��II� �'_-- i . __.._...__..._..--._.;...__.._.._..._....._........ ;.....- .._...__ ._.._ i 1 fI i V ! �J 11 ✓•�w -..:b '..... _.. ' _�... __.1..__«....._.......__ _... 1._.__..._! ...........: _..._...._;....... _.:._.... ........ l.i'l ! ' ! i :... _...,....._..P:_ Lr . .. iu .; I _ •__i•._ _--....._ i _ _ ..._.....I__ •.�»_ ._. __..�_•_•- ___�"_.'-i_'•_»_;._._._i'._.».... i.. _ 4._..__... j i ! i._.__ ••"` 1 •� /� . ,�,� A. . , I Ij I. i I._. .. i �_.._! • .__• V. ....._....�........ .. _ _•. _.. ._ _ f , i 1 _ .._.:.._..__: _-�..._...._..i.._. _... __•.I ....... ..... ;...__.._:.__.. : 0.1 , , I I ; t 'j'.- Imo. i•' - __.: ... .._ ; ,..___...!---'-.l._.._. I ;.I Y/c_ ._...!..... ................. r- .............. .:_..- .._...1._ _ _._.'_.. ! __ _- I I.. 1.............;. »..I , .•_.. __i-. _._...i.._...__.L.:..:._.._I.......... .j....... ..... i.................... 1.._. : , I ! t t ! ! I j i I ! ! j ' ! ! ! i j I-^? __ ._..'.._.._. _...._._.........._.......�.._......... i........._.? i . ' i ! 1 5TROUD ENGINEERING, P.A. Hestron Plaza Two 151 A Hwy. 24 MOREHEAD CITY, NC 28557 (252) 247-7479 f 701 .40 Jvu f 0 L. I SHEET NO. OF CALCULATED 0y DATE /o/ CHECKED Ot Axr=rA i SCALE ci • ... . ... .......... ....... $611 7' ........... . ..... . .... . ... . .. . .... . ............. '�o ......... . .. ..... ....... . ........... . . . ....... . ... W; 0 it I ...................... 1. 2. DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION The minimum bore depth: The type of soil: / 3. The expected infiltration rate: r (. t . Z& o�.l . `Z 3. 4 +Z �-- �•Cv 4. The depth to the Seasonal High Water Table: 5. Additional comments: Signature of Regional Office Personnel: 4d,, ZL4,�- Linda Lewis, DWQ Permit Application No. 5W} 010OZO S:1WQSISTORMWATIFORMSIINFINVST.FOR Vincent Lewis, Soil Scientist Date 'Z- 2-7-0 P. 1 COMMUNICATION RESULT REPORT ( JUN. 4.2001 11:04AM FILE MODE 554 MEMORY TX OPTION REASON FOR ERROR E-1) HANG UP OR LINE FAIL E-3) NO ANSWER ADDRESS (GROUP) 8-2522474098 TTI NCDENR WIRO RESULT PA --a ----------- - E-2) BUSY E-4) NO FACSIMILE CONNECTION North Carolina Department of Environment and Natural Resources Division of Water Quality Wilmington Regional office Michael F. ]+ asley, Governor William G. Ross, Jr., Secretary FAX COVER SMST Date: June 4, 2001 To: Ginger Turner Company: Stroud Engineering FAX #: 252-247-4099 DWQ Stormwater Project Number: SW$ 010220 Project Name.. Carteret General Hospital MESSAGE: - A- NOWN CAROLINA DKrANR RTMENT or ENVIRONNQNTAND NATURAL RmOuRGrLs "rfiages: 2 `om: Linda Lewis ater Quality Section - orrnwater 910-350 2004 one # 910,39" 0 "Please note that as of May 11, 2001, the Division has rescinded all previous siormwater guidance directive . These directives were replaced 8y the 19.95 version of the Mules. Chlorides testin or ro acts drainin to SA s waters will no longer be allowed Projects received after M 11,f p to class SA waters ar unnamed tributaries of SA waters, rn7rsl eitlze 001, that are w within i 12 mile of and draining infiltration ,system or an alternative non -discharging„ tj', or provide an system treating 1 5 North Carolina Department of Environment and Natural Resources Division of Water Quality Wilmington Regional Office Michael F. Easley, Governor William G. Ross, Jr., Secretary FAX COVER SHEET Date: June 4, 2001 To: Ginger Turner Company: Stroud Engineering FAX #: 252-247-4098 DWQ Stormwater Project Number: SW8 010220 Project Name: Carteret General Hospital MESSAGE: 'v A4T4'&'i 0--ft NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES No. of Pages: 2 From: Linda Lewis Water Quality Section - Stormwater FAX # 910-350-2004 Phone # 910-395-3900 "Please note that as of May 11, 2001, the Division has rescinded all previous stormwater guidance directives. These directives were replaced by the 1995 version of the rules. Chlorides testing for projects draining to SA waters will no longer be allowed. Projects received after May 11, 2001, that are within 112 mile of and draining to class SA waters or unnamed tributaries of SA waters, must either meet 25% low density, or provide an infiltration system or an alternative non -discharging system treating 1.5" of runoff. Dear Ginger: Carteret General was resubmitted on May 15. At this time, I am running about 45 days. Expect to hear something mid -late June. Regarding the certifications, yes, each project has a record on our database. One of the columns in the database is a record of the received date of the designer's certification. Unfortunately, printing reports is rather cumbersome. I have listed the outstanding project numbers and names for Stroud Engineering below: 950310 Pak a Sak 960424 Cart. Comm. College 960809 JM Davis 991121 Bluff s View 990411 Beaufort Prof. Park 961201 Env. Hlth. Bldg. 970812 Rosewood 971217 Cape Cart. Aquatic Wellness 000819 Primax Properties 010112 Kabuto S:\WQS\STORMWAT\ADDINFO\010220.JUN 960715 The Oaks 971034 Madison Park 970426 Cntr for Marine Sci.& Tech. 980346 Tiara Yachts 010209 Newport Hotel 127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper 0 STROUD ENGINEERING, P.A. Hestron Plaza Two 151-A Hwy. 24 MOREHEAD CITY, NC 28557 (252) 247-7479 WE ARE SENDING YOU ❑ Attached ❑ Under separate cover via ❑ Shop drawings ❑ Prints ❑ Plans ❑ Copy of letter ❑ Change order ❑ L,CE44GG3 OCR 4 ° G�]�GV]0�4Qd Ff 4XJsly-.• the following items: ❑ Samples ❑ Spec'rfications COPIES DATE NO. DESCRIPTION THESE ARE TRANSMITTED as checked below: ❑ For approval ❑ For your use ❑ As requested ❑ For review and comment ❑ FORBIDS DUE REMARKS ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ PRINTS RETURNED AFTER LOAN TO US PROd 20 COPY TO SIGNED: If enclosures are not as noted, kindly notify us at onI MAY-10-01 FRI i 1:54 PM 5TROUD ENGINEERING FAX NO. 2522474098 P. 1 FAX Transmittal Cover Sheet Stroud Engineerina, P. A. Hestron Plaza Two, Suite A 151 A Hwy. 24 Morehead City, Noah Carolina 28557 TEL. No.: (252) 247-7479 FAX: (252) 247-4098 r I Date: _S /Jo Ib 1 1 Job No.: VM f ( an #Of Pages (Including Cover Sheet): Project: 3 im Q� n t m -)_n Remarks- if/1 111 A x_ ,1 5 . 1 • Transmitted as checked below: O As Discussed D As Requested 0 For Your Review D For Comment 0 For Your Information D Original to Follow in Mail ❑ For Bids Due 0 For Approval D For your use 2000 107 Commerce Street 3961-A Market Street Hestron Plaza Two, Suite A Suite B Suite A 151-A Hwy. 24 Greenville, N. C. 27858 Wilmington, N. C. 28403 Morehead City, N. C. 28557 (252) 756-9352 (910) 815-0775 (252) 247-7479 MAY-10-01 FRI 1:55 PM STROUD ENGINEERING FAX NO, 2522474098 P, 2 STROUD ENGINEERING, P.A. HESTRON PLAZA TWO 151-A HWY. 24 MOREHEAD CITY, NORTH CAROLINA 20557 (252) 247-7479 May 10, 2001 Ms. Linda Lewis NCDENR Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 via fax-, 910-350-2004 Re: Carteret General Hospital No, SW8 010220 In response to your fax dated May 10, 2001, the requested changes have been made to the supplements and the detail in question. The supplements as well as the infiltration trench detail have been revised and are attached with this fax. The volumes were calculated based on a height of one foot, which is the height of the weir above the invert of the aluminum pipe. If this is the information required, please let me know and I will get you a copy of the revised plan. If you have any further questions or comments, please feel free to call. Sincerely,_ Ginger urner 107 COMMERCE ST. HESTRON PLAZA TWO SUITE B 102-D CINEMA DRIVE 151-A HWY. 24 GREENVILLE, NC 2765a WILMINGTON, NC 28403 MOREHEAD CITY. NC 28557 (252) 756-9352 (910) 815.0775 (252) 247-7479 MAY-10-01 FRI 1:55 PM STROUD ENGINEERING FAX NO. 2522474098 P. 3 Ln N O z m > .-[m7 N 00 A C V) Z - Q Z n ' � n 3m < Z C G7 rn -1 _ r;u D� a � Co r O rn O -n O - Z W Or � C C! � m �W N �D mN 0 `z= D upA n x� Ln -o --i �D O :< m z Im NM ::E r N n — O m • g N < z o - rn c) to Z -4 w "T1 D O n o m m 07 m O --� z �w M c) m - O o v u D amD-q z = m 0Q°oa N m D _ • N r D 0� C m K m D n z o r c 0 _^ z Cl) MAY-10-01 FRI 1:56 PM STROUD ENGINEERING FAX NO. 2522474098 P. 4 Trench Dimensions 12" CMP tJ V 0•G• -* Per+ranch b::� Height 12" -M ft. Length me- 10 ft. Width A'Eit ,Z r ft. Volume Provided N4-s .a$''cu.ft. "� C .0- Ill. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirernentc per the Stonrlwatcr Best Managentenl Practices manual (N.C. Dcparintent of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met and'supponing documentation is amiched. If the applicant has designated an agent in the Stonmwater Management Pennit Application Form, the agent may initial below. Attach justification ifa requirement has not been met. Applicatnis InIffids EOL - a. Systcm is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. c. Bottom of systern is at Icast 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. c. Off-line system, runoff in excess ol'thc design voltiine bypasses the system (bypass detail provided). nC System is designed to draw down the dcsirti storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogcologic evaluation may be required). g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour. h. Systcm is not sited on or in fill material or DWQ approval has been obtained. i. Plans ensure that the iinsWlled system will trees design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. VAL J. Systcm is sized to take into account the runoff at the ultimate bui)t-out poicnt jal from all surfaces d,(t• fining to the system, including any off -site drainage. I&WWAALN ated in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the neatest public right-of-way. I_ Systcm captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 incli event n for areas draining to SA waters ). ►C/1/G_ m. Drainage area for the device is less than 5 acres. i}. A prctr atmcnt device (filter strip, grassed swale, sediment trap, eta) is provided. sl'�l. ATottom is covered with a layer of clean sand to an average depth of 4 inches. J C, p. Sides of the infiltration trench arc lined with gcotextilc fabric. q. Rock used is free of fines (washed stone) and has a large void ratio. r. Side to bottom arcs ratio is less than 4:1. V(ir„ swu-to7 Ru%- 3.w Pag-c 2 or 4 MAY-10-01 FRI 1:56 PM STROUD ENGINEERING Trench Dimensions 12" CIS (Pal 0.6, 1-Icighl 12" CKP -ft. W Will Ill. REQUIRED ITEMS CHECKLIST FAX NO. 2522474098 P. 5 � Fly-t-✓enc�l }}� Length .9 6 b ft. Volume Provided X*-.-5u.ft. &t3& Cr f The following checklist outlines design requirements per the Stormwatcr Tics( Managcmcnt Prac(iccs manual (N.C. Department of Environment. Health a➢ld Nalural Resources, November 1995) and Administrative Code Scction: 15 A NCAC 2H .1005. initial in the space provided to indicate that the following design requircmen(s have been tnct and supporting documentation is Miched. If the applicant has designated an agent in the Stormwatcr Management Pemlit Application Form. the agent may initial below. Attach justification if a requirenicnt has not been niel. nitlltti Initials J. Sytiten, is located 50 feet from class SA waters and 30 feet From other surface waters. _QeL)L,. b. System is located at least 100 feel from %Ntatcr supply wells. c. Bottom of sysicin is at least 2 feet above the seasonal high water table. pp d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. ,�fLSl C. off-line system, runoff in excess of the design volume bypasses the system (bypass detail provided). f. Systcm is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogeoloeic evaluation may be required)_ g. Soils have a minimum hydraulic conductivi(y of 0.52 inches per hour_ h. Systcm is not sited on or in fill material or DWQ approval has been obtained. Plans ensure that the installed system will tneot design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. j. Systcnl is sized to take into account the runoff at file ultimate built -out potential front all C_tb Vp suffac draining to the system, including any ofPsitc drainage. k. SyStcltt Is located in a recorded drainage casement for the purposes of operation and nlaintcnanec and has recorded access easements to the nearest public right -or -way. Z 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). re Al in. Drainage area lie the device is less than 5 acres. ti, A pr treatment device ( filter strip, grassed swalc, sediment trap, etc.) is provided. U IS{� �SUi'rL A bottom is covered with a layer of clean sand to an depth average of 4 inches. p. Sides of the infiltration trench are lined with geotcxlilc fabric. q. Rock uscd is fice offines (waslicd stone) and has a large void ratio. MAY-10-01 FRI 1:57 PM STROUD ENGINEERING FAX NO. 2522474098 P. 6 %cJ,,evvle-r-, Trench Dimensions 12" CMP © 3' 0 G Per +Yetnc �► Hcighi 12" CFI ti'�. Length -06VC _ ft. W idth —i. ft. Volume Provided '881T $-'$ u.f. Ili. REQUIRED ITEMS C111ECKLIST The following checklist outlines dc`ign requircmctus per the Storniwater Best Managcmcnt Practices manual (N.C. Department of Environment. Hcalth and Natural Itcsourccs, November 1995) and Administrative Code Section: 15 A NCAC 211 .1008. Initial in the space provided to indicate that (lie following design requirements have bcen met and supporting documentation is attached. if the applicant has designated an agent in the Slonnwater Managcmcnt Permit Application Form, the agent may initial below. Attach justification if a requirement has not been mct. Applicants Initiates G a. System is located 50 feet froth class SA waters and 30 feet from other surface waters. b. Systen) is located at least 100 feet from water supply wells. �7 ,�, c. 13ottuni of system is at least 2 feel abovc the scasonal high water table. MPI/� d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. �f✓ c. OCC line systcm, runoff in excess of the design voltttne bypasses the systcm (bypass detail provided). _ZV_F. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogeologic evaluation may be required). L1g. Soils have a minimum hydraulic conductivity of0.52 inches per hour. 006 h. System is not sited on or in fill material or DWQ approval has bcen obtained. i. flans ensure that the installed systcm will mcct design specifications (constructed or restored) upon initial operation once the project is complete and llte entire drainage area is stabilized. j. System is sized to take into account the runoff at llhe ultimate built -out polcnlial from all surf�-cs draining to the systcm, including any off silt drainage. nnnn// o I e rccZt it9 k. ystcn is located in a recorded drainage casement for tiie purposes of operation and maintenance'and has recorded access easements to the nearest public right-of-way. 1. Systcm capturca and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event Z for areas draining to SA waters ). M. Drainage area for the device is less than S acres. 12 �� n, A pr treatment device ( filter strip. grassed Swale, sediment trap, etc.) is provided. PrX I�'�'iYIQ n c i bottom is covered with a layer of ciean sand to an average depth of 4 inches. J P. Sides of the infiltradon trench arc lined with geotextile fabric. d. Rock used is fi-cc of fines (was)ied stone) and has a lat•gc void ratio. * * * COMMUNICATION RESULT REPORT ( MAY.10.2001 12:18PM ) P. 1 FILE MODE OPTION 953 MEMORY T`.; REASON FOR ERROR E-1) HANG UP OR LINE FAIL E-3) NO ANSWER ADDRESS (GROUP) 8-2522474099 North Carolina Department of Environment and Natural resources Division of Water Quality► Wilmington Regional Office Michael F. Easley, Governor William G. Ross, Jr., Secretary Date: May 10, 2001 To: Ginger Turner Company: Stroud 'fing necring FAX #: 252-247-4098 TTI NCpENR WIRO RESULT PAGE OK P. 1/1 E-2) BUSY E-4) NO FACSIMILE CONNECTION NCDENR NORTH CAR06114A DEPARTM)aN7 OF ENVIRONMENT AND NATURAL RF-SOURCES FAX COVER. SHEET Pages: 1 QLer Linda Lewis Quality Section - 910-350-2004 # UL-395-3900 DWQ Stormwater Project Number: SW8 010220 Project Name: Carteret General I4ospital Additions and Renovations E: Dear Ginger: I'm still having trouble with the trench dimensions. I understand that a row of 12" pipes will be placed in a stone trench for each drainage basin. How deep, wide and long is that stone trench? The detail indicates that some of the stone will be placed over the 1211 pipes, and to the side, but it does not indicate how much that is. 'What I need are the overall dimensions for each proposed trench shown on the supplement and on the plans. 71,P mirm1A,,,Pn1-c a.re still not quite done, either, In the trench dimension blanks at the top Of page 2, the height of North Carolina Department of Environment and Natural Resources n!, Division of Water Quality Wilmington Regional Office Michael F. Easley, Governor Willian, G. Ross, Jr., Secretai7y Date: May 10, 2001 To: Ginger Turner Company: Stroud Engineering FAX #: 252-247-4098 t■■ NCDENR ENVIRONMENT AND NATURAL RESOURCES FAX COVER SHEET No. of Pages: 1 From: Linda Lewis Water Quality Section - Stormwater FAX # 910-350-2004 Phone # 910-395-3900 DWQ Stormwater Project Number: SW8 010220 Project Name: Carteret General Hospital Additions and Renovations MESSAGE: Dear Ginger: I'm still having trouble with the trench dimensions. I understand that a row of 12" pipes will be placed in a stone trench for each drainage basin. How deep, wide and long is that stone trench? The detail indicates that some of the stone will be placed over the 12" pipes, and to the side, but it does not indicate how much that is. What I need are the overall dimensions for each proposed trench shown on the supplement and on the plans. The supplements are still not quite done, either. In the trench dimension blanks at the top of page 2, the height of the trench, based on the detail, appears to be more than 12". If it is supposed to be just 12", please show the top of the #57 stone even with the top of the 12" pipe in the detail. Please specify the correct trench height on the supplement and on the plan details. The width of the trench will be the overall width for that system, not just 3'. The length will be the length. The provided volumes reported on the supplement are now well short ofthe minimum required. Again, please report the total volume provided in the whole trench, taking into account the voids. LLkMMI 1211� 6 ASPHALT � mar is -r+�is r��r���? S:\WQS\STORMWAT\ADDINFO\010220.MAY 127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper STROUD ENGINEERING, P.A. HESTRON PLAZA TWO 151-A HWY. 24 MOREHEAD CITY. NORTH CAROLINA 28557 (252) 247-7479 March 27, 2001 Ms. Linda Lewis NCDENR Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 Re: Carteret General Hospital No. SW8 010220 RECEIVED MAR 2 9 2001 DwQ PROJ# :5W9010 ZU Enclosed are the revised sheets requested by your letter dated March 19, 2001. The following are either answers to your requests or where to find them on the drawings. 1. There are no wetlands on site and a note can be found of C5 of the drawing set. 2. The stone to be used is No. 57 and has been called out on the detail sheet C8 and the void ratio used is 0.4. 3. Another set of calculations has been enclosed as well as new calculations for the additional volume for the voids in the stone, which reduced the amount of piping. 4. On the sheet C3, the dimensioned basin has been changed to reflect the bottom of the infiltration basin, which is elevation 23.4 and has been noted on the plans. 5. See sheet C8 for the inverts, pipe sizes and weir elevations for each control box. 6. The vegetative filter has been labeled on sheet C7 and sheet C8 and C9 has the details of both the flow spreader and Swale cross section. If you have any further questions or comments, please feel free to call. Sincerely, Ging urner 'i0! COMMERCE ST. HES-iRON PLAZA TWO SUITE B 102-D CINEMA DRIVE 151-A HWY. 24 GREENVILLE, NC 27858 WILMINGTON, NC 28403 MOREHEAD CITY, NC 28557 (252) 756-9352 (910) 815-0775 (252) 247-7479 North Carolina Department of Environment and Natural Resources Division of Water Quality Wilmington Regional Office Michael F. Easley, Governor William G. Ross, Jr., Secretary March 19, 2001 Mr. Fred Odell, President Carteret General Hospital 3500 Arendell Street Morehead City, NC 28557 A' YT4 Zx NCDENK NORTH CAROLINA DEPI;RTMENT OF ENVIRONMENT AND NATURAL RESOURCES Subject: REQUEST FOR ADDITIONAL INFORMATION Stormwater.Project No. SW8 010220 Carteret General Hospital Additions & Renovations Carteret County Dear Mr. Odell: The Wilmington Regional Office received a Stormwater Management Permit Application for Carteret General Hospital Additions & Renovations on February 14, 2001. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: Please delineate all wetlands. on site, disturbed or undisturbed, or note on the plans that none exist. 2. Please specify the stone to be used in the trenches on the supplement form. 3. What is the void ratio of the stone? 4. Please send in readable calculations. The ones I have are so faded in places, I can't read part of them. 5. Please specify the height and width of the stone trench on the detail and on the supplements. If it varies for each drainage area, please note the design height and width needed for each on the plans. The volume of the voids in the stone trench can be included in the total provided volume to meet the 1.5" storage requirement. This may reduce the amount and/or size of the proposed piping, since so much excess volume has been provided.. 6. On sheet C3, please indicate which contour in the infiltration basin the dimensions provided apply to. 7. For all the control boxes, please provide the inverts, pipe sizes, and weir elevations rather than referring back to the plan. That's why we have details, to reduce confusion about what goes where, and what size and elevation it's supposed to be. 8. Please label the grassed area from DI-3 to the existing inlet in Arendell Street as the required 50, vegetated filter. Provide a detail with slopes, elevations, inverts, the flow spreader mechanism, grass type to be planted, etc. 127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity. Affirmative Action Employer 50% recycled/10% post -consumer paper Mr. Odell March 19, 2001 Stormwater Project No. SW8 010220 Please note that this request for additional information is in response to a preliminary review. The requested information should be received by this Office prior to April 19, 2001, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 395-3900. Sincerely, d& GCk' 6. Linda Lewis Environmental Engineer RSS/arl: S:1WQSISTORMWATIADDINF01010220.MAR cc: Linda Lewis Ron Cullipher, P.E. 127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 2 50% recycled/10% post -consumer paper STROUD ENGINEERING, P.A. Hestron Plaza Two 151-A Hwy. 24 MOREHEAD CITY, NC 28557 ((252) 247-7479 TO N f p V L Cad;4 na l U - �J i lNll,m����1 C. 2$ WE ARE SENDING YOU ❑ Attached ❑ Under separate cover via ❑ Shop drawings ❑ Prints ❑ Plans ❑ Copy of letter ❑ Change order ❑ 11,12u lgn @IF 4Uo H@ 0CTCTLad ATTENTION ❑ Samples the following items: ❑ Specifications DESCRIPTION THESE ARE TRANSMITTED as checked below: ❑ For approval ❑ For your use ❑ As requested ❑ For review and comment ❑ FORBIDS DUE REMARKS ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ PRINTS RETURNED AFTER LOAN TO US Vk-p . C l i - la CIA- 2U-A4 R COPY TO SIGNED: If enclosures are not as noted, kindly notify us at on - TO STROUD ENGINEERING, P.A. Hestron Plaza Two 151-A Hwy. 24 MOREHEAD CITY, NC 28557 (252) 247-7479 Z\ WE ARE SENDING YOU ❑ Shop drawings ❑ Copy of letter d ❑ Under separate cover via ❑ Prints ❑ Plans ❑ Change order ❑ uMUTEn OIF o LJV�LRILJ��Lr-��� DATE 2 ^ j JOB-N ✓ 1 A � ATTENTION RE: e ❑ Samples the following items: ❑ Specifications COPIES DATE NO. DESCRIPTION THESE ARE TRANSMITTED as checked below: ❑ For approval ❑ For your use ❑ As requested ❑ For review and comment ❑ FORBIDS DUE REMARKS ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ PRINTS RETURNED AFTER LOAN TO US COPY TO SIGNED: , If enclosures are not as noted, kindly notify us at on � -STROUD ENGINEERING, P.A `. V Hestron Plaza Two 151-A Hwy. 24 4ut11 MOREHEAD CITY, NC 28557 �1�e �%(252) 247-7479 TO PVC — piVI S&r\ 6 WE ARE SENDING YOU ❑ Shop drawings ❑ Copy of letter • rl RE: ❑ Attached ❑ Under separate cover via ❑ Prints ❑ Change order ❑ Plans n the following items: ❑ Samples ❑ Specifications DESCRIPTION MEN' - ,� % 2& d _ THESE ARE TRANSMITTED as checked below: ❑ For approval ❑ For your use ❑ As requested XFor review and comment /❑ FORBIDS DUE REMARKS ❑ Approved as submitted ❑ Resubmit copies for approval ❑ Approved as noted ❑ Submit copies for distribution ❑ Returned for corrections ❑ Return corrected prints ❑ PRINTS RETURNED AFTER LOAN TO US FEB 1 DWQ PROD # COPY TO SIGNED: fbU�Y4-L K enclosures are not as noted, kindly notify us at on .