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HomeMy WebLinkAboutSW8011020_HISTORICAL FILE_20020306STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 W w 2 o DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS 1�1 HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 20 o2 03ou YYYYMMDD t h4iohael F. Easley, Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources March 6, 2002 Ms. Nancy,86ttenfield, Vice Chancellor UNC-CH Finaneq and Administration CB#1000 300 S!"r uilding Chapel Hill, NC 27599-1000 Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality Wilmington Regional Office Subject: Permit No. SW8 011020 Fisheries Research Lab and Shop Building Replacement High Density Stormwater Project Carteret County Dear Ms. Suttenfield: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Fisheries research Lab and Shop Building Replacement on January 25, 2002. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 011020 dated March 6, 2002, for the construction of Fisheries research Lab and Shop Building Replacement. This permit shall be effective from the date of issuance until March 6, 2012, 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 ofthe stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. Thisrequest 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:\WQS\STORMWAT\PERMIT\011020.MAR cc: Ron Cullipher, P.E. Town of Morehead City Building Inspections Division of Coastal Management Linda Lewis Wilmington Regional Office Central Files "A IN DENR N.C. Division of Water Duality 127 Cardinal Drive Extension Wilmington, N.C. 28405 (910) 395-3900 Fax (910) 350-2004 Customer Service 800-623-7748 1 State Stormwater Management Systems Permit No. SW8011020 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 UNC-CH Finance and Administration Fisheries Research Lab and Shop Building Replacement Carteret County FOR THE construction, operation and maintenance of an underground infiltration trench 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 March 6, 2012, and shall be subject to the following specified conditions and limitations: L DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for.the management of.stormwater runoff as described on page 3 of this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 9,554 square feet of impervious area. This system must be operated with a 50' vegetated filter. 3. 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. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 6. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 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 011020 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 UNC-CH Finance and Administration Fisheries Research Lab and Shop Building Replacement Carteret County FOR THE construction, operation and maintenance of an underground infiltration trench 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 March 6, 2012, and shall be subject to the following specified conditions and limitations: 1. 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 control has been designed to handle the runoff from 9,554 square feet of impervious area. This system must be operated with a 50' vegetated filter. 3. 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. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 6. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. A permit modification must be submitted and approved prior to the construction of additional built -upon area from outside of the approved drainage area. State Stormwater Management Systems Permit No. SW8 011020 Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Name of Receiving Stream/Index #: Classification of Water Body: Trench Dimensions, LxWxH, feet: Perforated Pipe Diameter & Length: Drainage Area, acres: Offsite Area entering Pond, ftz: DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Fisheries Research Lab and Shop Building Replacement Total Impervious Surfaces, ft=: Required Storage Volume, ft': Provided Storage Volume, W Trench Bottom Elevation, FMSL: Temporary Storage Elevation, FMSL: Type of Soil: Expected Infiltration Rate: Seasonal High Water Table Elevation: Time to Draw Down: 6w? :11IIQIX11 Carteret County Ms. Nancy Suttenfield, Vice Chancellor UNC-CH Finance and Administration CB#1000 300 S. Building Chapel Hill, NC 27599-1000 January 25, 2002 White Oak / Bogue Sound / 20-36-(8.5) 72x30x 1.5 18" y / 720 feet (10 runs of 72' each) 0.22 None, per engineer 9,554 1,194 1,836 11.5 13 Sand 4 inches per hour 9.5 FMSL 1.7 hours 3 State Stormwater Management Systems Permit No. SW8 011020 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. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 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 vegetated filter. d. Immediate repair of eroded areas within the project. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, overflow weir, flow spreader, catch basins and piping. g. Access to the bypass structure must be available at all times. h. Pump maintenance to insure correct operation. 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. 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. 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 7. 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. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, 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. 9. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. 10. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. n State Stormwater Management Systems Permit No. SW8 011020 11. Prior to the sale or lease of any portion of the property, the permittee shall notify DWQ and provide the name, mailing address and phone number of the purchaser or leasee. 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 or lease of any portion of the property. 12. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon area. 13. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable. 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. Responsibility for compliance with all permit conditions remains with the Permittee until such time as the Division approves the formal permit request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) 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 during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and 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 6th day of March, 2002. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION 171A-rA/ AAA AA.�r, Gregory J. Thorpe, Ph.D., Acting Director ` `a —En Division of Water Quality By Authority of the Environmental Management Commission 5 I OFFICE USE ONLY,. - Date Received Fee Paid Permit Number o-�S-oI qao. - o� 9 v $ J).O State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION !' 1. Applicants name (specify the name of the corp-oorration, individual, etc. who ownsslthe project): C"V 0j'" 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Nancy D. Suttenfield , if ; Le (",ttW 1W i--�au.ca.. 4 ACLW i K 'I,, if-&4`r" 3. Mailing Address for person listed in item 2 above: University of North Carolina/`t—Chapel Hill CBII1000 300 S. Building City Chapel Hill Stata, NC 7in. 27599-1000 Telephone Number:.( 919-" ) 962-3795 A. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Fisheries Research Lab & Shop Building Replacement �KSiihle �tv VUQNrKO �c 2e 5. Location of Project (street address): 3134 Arendell Street City Morehead County: Carteret 6.Directions toproject (from nearest major intersection): From the Intersection of NC Hwy 24 & US Hwy 70 take Hwy 70 East Approx. 1 1/2 mile Marine Science Building is on the right. 7. Latitude:_N-34 43' Longitude:_N--760 451 of project 8. Contact person who can answer questions about the project: Name: Ron Cullipher Telephone Number: ( 252 )247-7479 II. PERMIT INFORMATION: / I. Specify whether project. is (check one): ✓ New Renewal Modification Form SWU-101 Version 3.99 Pagc I of 4 2. If this application is being submitted as the result of a renewal or modification to an existing, permit, list the existing permit number SW8 961201 Modification and its issue date (if known).MarCb_2-5,—L99_$ 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 Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION I. In the space provided below, summarize how stormwater will be treated. Alsd attach a detailed narrative (one to two pages) describing stormwater management for the project . Under the Parking Lot Infiltration 2. S(onnWater runoff from this project drains to the 3. Total Project Area: 6.65 acres White Oak . 5. How many drainage areas does the project have? 2 River basin. 4. Project Built Upon Area: `34.43 % 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. F_YJ<,I-).lr .Basin Information ; ,Drainage Areal .. ;.`. ;.'-Drainage Area 2 Receiving Stream Name Bogue Sound Bogue Sound Receiving Steam Class SA SA Drainage Area 0.22 Ac. 95S4.3Sgv 6.40 AC i - 2.04 AC Fxisting Impervious` Area 0 Proposed hnpervious"Area 1 0.22 Ac. 9554.35gv 0 % Impervious* Area (total) 1100% 31.889< Impervious*,Surface Area Drainage Area I Drainage Area 2 . On -site Buildings .22 Ac. 0.77 AC On -site Streets 0 On -site Parking/Sidewalks 0 1.27 AC On -site Sidewalks 0. 0 � Ac . 0 Other on -site _ 0 Off -site _ 0 Total: 0.22' Ac. cj554 Total: 2.04 AC Impervious area is defined as the built upon area including, but not limited to. buildings, roads, parking areas, sidewalks, gravel areas. etc. Form SWU-101 Version 3.99 Pace 2 of 7. How was the off site impervious area listed above derived? IV /A 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 of swimming pools. 3. Sivales shall not be filled. in. piped. or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess ofthe permitted amount requires a state stormwater management permit modification prior to construction. 5. All permitted runoff ham 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 Permits 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 SWU-106 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 SWU-101 Version 3.99 Page 3 of 4 VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ 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 copy of the Stormwater Management Permit Application Form One copy of the applicable Supplement Form(s) for each BMP Permit application processing fee of $420 (payable to NCDENR) Detailed narrative description of stormwater treahnent/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 sizes, runoff calculations - Drainage areas clelincated - Vegetated buffers (where required) VII. AGENT AUTHORIZATION ]f 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: Morehead State: NC Zip:' 28557 Phone: ( 252 ) 247-7479 Fax: ( 252 ) 247-4098 VIII. APPLICANT'S CERTIFICATION U:, CL&, C.l1M 6 f, (print or type name ofperson listed in General Information, item 2) _,)T Nancy - D..Sutteiifield _F; Kuxer _hd tu;urske{'a 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 21-I .10a n r1 0 Date: (0 10 L' 1 I Form SWU-101 Version 3.99 Page 4 of 4 STROUD ENGINEERING, P.A. Hestron Plaza Two 151-A Hwy. 24 MOREHEAD CITY, INC 28557 (252) 247=7479 To N C-DENR - Woter Q ua.I IN 127 Cswr1; V%d-1. Dion. G x -. W6vk;yA4+tK, K<G 2b410S WE ARE SENDING YOU ❑ Shop drawings O Copy of letter dC TT1212 @IF 4 o [f111�3LvID44Lad DATE II� 02 JOB NO. ATTENTION Lewis RE: r 2692 ll WIy1 ❑ Attached ❑ Under separate cover vft, he following items: ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Change order ❑ IWKWWWAIIII THESE ARE TRANSMITTED as checked below: ❑ For approval ❑ For your use El As requested For review and comment ❑ FORBIDS DUE ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections 2 ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ PRINTS RETURNED AFTER LOAN TO US COPY TO JW4 n N"`x/A SIGNED: �� `+V /1 enclosures are not as noted, kindly notify us at ow.. 'jam• i� tr • i7 1 ,_I • ,F Yl� I r + � 1 STROUD ENGINE[ NG, P.A. Hestron Plaza Two 151 A Hwy. 24 MOREHEAD CITY, NC 28557 (2.52) 247-7479 z STROUD ENGINE[ NG, P.A. Hestron Plaza Two 151 A Hwy.,24 MOREHEAD CITY, NC 28557 (252) 247.7479 p VV V .+ 1�..:. V5 ...... VT d..... joB_Y1Stit-ZlES �EStTM?cH SHEET NO. OF CALCULATED BY pATE ID I Z Z) O I CHECKED BY 7b DATE — SCALE _ 0 J pgmiAll(smkSaar)m I l PROPOSED BUILDING WITH IN 308.39 SF EXISTING GRAVEL AREA PROPOSED BUILDING NOT WITH IN 8658.35 SF EXISTING GRAVEL AREA PROPOSED SIDEWALK WITH IN 2142.74 SF EXISTING GRAVEL AREA PROPOSED SIDEWALK NOT WITH IN 896.00 SF EXISTING GRAVEL AREA NEW IMP. AREA WITH IN 2451.13 SF EXISTING GRAVEL AREA NEW IMP. AREA NOT WITH IN 9554.35 SF EXISTING GRAVEL AREA IMP. AREA OVERLAP STROUD ENGINEERING, P.A. HESTRON PLAZA TWO 151-A HWY. 24 MOREHEAD CITY, NORTH CAROLINA 28557 (252) 247-7479 NCDENR Dept. of Environmental Health 127 Cardinal Drive Extension Wilmington, N.C. 28405 Attn: Linda Lewis Re: Fisheries Research Lab and Shop Replacement Building Stormwater Project No. SW8 01 1020 Carteret County January 14. 2002 Dear Linda, In reference to your letter dated January 10, 2002 concerning the above referenced project the following changes have been made. I. The inlet, outlet, and bypass pipes have been labeled on the detail on sheet C-2. 2. A note concerning the wetlands has been added to the general notes on sheet C-2. 3. Weeping Love Grass has been removed from the seeding schedule. 4. -file 6 x 4 pit and the 12" CPP has been provided for the discharge of sound water back to the sound from inside the building. 5. A 75' vegetative filter has been provided with a 0.50% slope to treat the overflow before sheet Flowing to the sound. 6. The infiltration trench width is 30'. This has been corrected on the supplement sheet. The height of the trench is 18" and the detail has been revised to show this. 7. The calculations for the trench volume have been included and the volume has been added to the supplement sheet. 8. Page 4 has been initialed. 9. The length of the perforated pipe has been changed to 72W on the supplement sheet. 10. The appropriate infiltration units has been circled on the supplement sheet. 11. The benchmark for sediment removal has been added to the supplement sheet. If there is any additional information needed or if you have any questions feel fi'ee to give n1e a call. Sincerely, Matthew L. Montanye 107 COMMERCE ST. HESTRON 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 Michael F.,Easley, Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality Wilmington Regional Office January 10, 2002 Ms. Nancy D. Suttenfield, Vice Chancellor UNC-CH Finance and Administration CB#1000 300 S. Building Chapel Hill, NC 27599-1000 Subject: REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 011020 Fisheries Research Lab & Shop Building Replacement Carteret County Dear Ms. Suttenfield: The Wilmington Regional Office received a Stormwater Management Permit Application for Fisheries Research Lab & Shop Building Replacement on October 25, 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 label the inlet, outlet to flow box, and bypass pipes on the flow box detail. As shown, the detail is confusing. 2. Please either delineate all wetlands on site, disturbed or undisturbed, or note on the plans that none exist. 3. Please remove Weeping Love Grass from the seeding schedule. This grass is not recommended for use in North Carolina as either a temporary or permanent grass cover. 4. What is the purpose of the 6 x 4 pit and the 12" CPP running from it out to the Sound? This piping is labeled as the piping from the building trench grates, but the water collected in the trench grate appears to be released on the west side of the building, not the back. Please clarify. 5. The rules require a 50' vegetated filter for the overflow from all infiltration systems. Please show and detail the required filter on the plans. Include slopes, inverts, flow spreader, distances, grass, etc. 6. According to the detail, the total infiltration trench width is 30', not 27, and the height appears to be more than 18", as reported on the supplement. The dark line surrounding the trench in the detail indicates that the stone extends an indeterminate amount above the pipe and 18" on each side of the centerline of the pipes on the ends. Please revise the supplement to show the actual stone trench dimensions and dimension the amount the stone extends above the pipe. The provided trench volume is neither calculated nor shown on the supplement. Please show this in the calculations and fill in the blank on the supplement. S. Please initial page 4 of the application. A iJCDEN—H N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 (910) 395-3900 Fax (910) 350-2004 Customer Service 800-623-7748 Ms. Suttenfield January 9, 2002 Stormwater Project No. SW8 011020 9. The total perforated pipe length is 720', not 72' as reported on the supplement. Please revise. 10. Please circle the appropriate infiltration units on the supplement. 11. Please indicate the benchmark for sediment removal in the system on the supplement form. 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 February 10, 2002, 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, Linda Lewis Environmental Engineer RSS/arl: S:\WQS\STORMWAT\ADDINFO\2002\011020.JAN cc: Linda Lewis Ron Cullipher, P.E. '-,STROUD ENGINEERING, P.A. Hestron Plaza Two 151-A Hwy. 24 MOREHEAD CITY, NC 28557 (252) 247-7479 VIiAzEQ To 12'1 C_42.N AL be.N e EXT I� Z �e", P ILL44CR0 OF 4 [�00]044Lad DATE Itl��vI Il O, JOB -N�o. ATTENTION 1l RE: sH TZt L P'tab S l3 WE ARE SENDING YOU ❑ Attached ❑ Untler separate cover via the following items: ❑ Shop drawings ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Copy of letter ❑ Change order ❑ �__�: �•. 1. c.. Lola THESE ARE TRANSMITTED as checked below: For approval ❑ For your use ❑ As requested ❑ Approved as submitted ❑ Approved as noted ❑ Returned for corrections ❑ For review and comment ❑ ❑ FORBIDS DUE PROJ # ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS IF' LINi Ap"10 _' ease V2e\ v zel�- To 4lye_ NAQ Ci QxkA MaTT MnAoNe COPY TO SIGNED: If enclosures are not as noted, kindly notify us at once. cj, I"ilioIUL ��r��/�GtO'!1//%LP/IlA(LG u(Y/WCI ,,Wd 61'# e 6&x 2522 Vdm,,V&an, ✓iA&&WA &wl.n 28402 .%�990-4.52-0009 F yB�� J9iafe,l1. JtWl A RVE � E I�.LL.J �J Y.&>4 ;p OC 1 2 5 2001 q3805u DWQ 28403 PROJ# SWYO/(UZO DATE: April 25, 1998 SUBJECT: Land & soils evaluation of the Marine Fisheries Tract SW Portion to determine usability with infiltration stormwater treatment usage. Tract located on the south side of Arendell Street (U.S. Hwy 70), adjacent to Bogue Sound, West Morehead City, Carteret County, North Carolina. TO: Mr. Ron Cullipher, PE (Project Manager) Stroud Engineering Company, PA 151-A NC Hwy 24 W., Hestron Plaza II, Suite A Morehead City, NC 28557 (919) 247-7479 The land & soils of the Marine Fisheries Tract SW Portion 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. This project involves redevelopment of an existing facility which requires stormwater treatment for those portions. The proposed project is greater than 1 acre in size, has >25% impervious surfaces, drains to Class S.A. or S.C. Waters, and is within 1/2 mile of class S.A. Waters. If a project drains to Class SC or Unclassified Waters, stormwater may be treated by detention ponds or infiltration basins. If the development project is within 112 mile of and drains directly to Class SA Waters or their unclassified tributaries, stormwater must be treated by infiltration basins or an equivalent alternative method. The tract has previously been determined to be geographically located within 1/2 mile of Class S.A. Waters to the south, thus stormwater is to be treated through infiltration basins. This tract has broad sandy ridgetops, that slope (-3-10%) to poorly drained flats adjacent to Bogue Sound. 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; ---recent fill material is not usable. The enclosed land & soils map shows the various land/soil types found (see map). The following are brief descriptions of these land & soil types for stormwater infiltration usage: The "GREEN" Areas (see map) are well drained to somewhat excessively drained, deep sandy soils. These soils have an estimated seasonal high water static water table +48 to 65 inches from the surface based upon soil wetness indicators, —8-12 ft elevations abmsl. Estimated permeability is <5-15 min/in (+4-12 in/hr) to +48" depths. These soil types should be considered Page 2. Marine Fisheries Tract SW Portion, Stormwater Treatment as suitable for shallow infiltration stormwater system usage with basin bottom depths —2-3 ft into the ground surface. Upper soils have minor disturbance from historic surrounding development activities, but act like natural soils. Soil types found are Wando and Alaga. These naturally suitable soil areas should not be significantly excavated or altered. The ' YELLOW" Areas (see map) are moderately well drained to well drained, deep sandy soils. These soils have an estimated seasonal high water static water table between +36 to 48 inches from the surface based upon soil wetness indicators, (-7-8 ft elevations abmsl). Estimated permeability is <5-15 min/in (+4-12 in/hr). These soil types should be considered as suitable for shallow placed (1-2 ft bottom depths) infiltration basin system due to seasonal high static water table depths. Additional basin depth can be attained with above ground man-made sidewall berms. Upper soils may have minor disturbance from historic surrounding development activities, but act like natural soils. Soil types found are Wando and Alaga. These naturally suitable soil areas should not be significantly excavated or altered. The'BROWN"Areas (see map) are moderately well drained, deep sandy soils. These soils have an estimated seasonal high water static water table between +24 to 36 inches from the surface based upon soil wetness indicators, —7 ft elevations abmsl. Estimated permeability is <5-15 min/in (+4-12 in/hr). These soil types should be considered as suitable for ultra -shallow placed (1-1.5 ft bottom depths) infiltration basin system with man-made sidewall berms, due to seasonal high static water table depths. Soil types found are Conetoe and Pactolus. These naturally suitable soil areas should not be significantly excavated or altered. The 'PINK" Areas are somewhat poorly to poorly drained sandy soils, or significantly altered soils from historic development activities. These soils have an estimated seasonal high water static water table between <12 to <24 inches from the surface based upon soil wetness indicators, —5-6 ft elevations abmsl. Estimated permeability is 5-60 min/in (1-12 in/hr). These soil types should be considered as unsuitable for infiltration basin systems due to depths to seasonal water table and/or mixed historic fill materials with slow permeability. Soil types found are Pactolus-wet phase, Leon, Seabrook -wet phase, and historic dredge fill materials. Enclosed is a representative cross-section of this tract which should be used to determine the depths of infiltration basin bottoms in order to maintain the required 2 ft buffer from static seasonal high water table levels (see cross-section). The tract is relatively uniform as to soil textures, but varies significantly as to depth to static seasonal high water table levels. The better sites for stormwater infiltration system usage are on the higher elevations, with marginal to unsuitable sites being at intermediate to lower elevations. Careful planning and design should be exercised to insure usable soil areas are reserved for stormwater infiltration treatment, and relatively preserved in their natural state. Otherwise, the usable soil areas could be degraded to an unsuitable status for stormwater infiltration basins. Soil logs can be provided upon request. Larry F. Baldwin, CPSS/SC ARCPACS #2183; NCLSS #1040 LAND & SOILS MAP OF THE MARINE FISHERIES TRACT (SW portion) FOR INFILi _ _.TION STORMWATER SUITAL . n West Morehead City - Carteret County - North Carolina Suitable soils for shallow jl (-2-3' bottoms) infiltration atorrnwater usage. SandyaExisting r u textures with est permeability 5-15 minfin +4-12 in/hr . m ` rs Cokert"fit w+ Est seasonal high water table011 +48-65" from ground surface F ¢ aFfd $mldm "+� > s "r+ 9v or -8-12 ft eN abmsl. Wando and Alaga soils.wl- Suitable soils for shallow��� (-1-2' bottoms) infiltration �r y stormwater usage. Sandy textures with est permeability 5-15 miMn (+4-12 in/hr).Est seasonal �r gh water table +36 48" from hrrou d surface g 2 ,r or -7-8 ft eN abmsl. o These soils on slopes, We m Alaga soils. Provisionally suitable soils for infiltration stormwater usage with list.' shallow bottoms (1-1.5') and isJ s sidewall berms. Sandy textures with est permeability 5-15 mmin or, n 't (+4-12 in/hr). Est seasonal high water table +24-38-) from ground µ o ` T surface. Conetoe and s,-PS , « s PaCtolus Soil types. �� 8' eN Existing i + h Unsuitable soils for on -Site IT i'"e m'S +w `e r x t r d - *�"x* r a 1 Pier & infiltration stormwater '"Ir e�� 'v �'' Boardwalk usage. y „V bt , q • a" v� 5, n. _ wx &» SOUND 'n. Mean high tide line S01L , SCALE: 1 Inch = 60 Feet (soil lines paced & approx) APRIL - 1898 Land Management Group, Inc. fi REPRESENTATIVE CROSS-SECTION OF THE MARINE FISHERIES TRACT (SW Portion) FOR ON -SITE INFILTRATION STORMWATER SUITABILITY AND DEPTH TO SEASONAL HIGH STATIC WATER TABLE ft eN West Morehead City - Carteret County - North Carolina ft elv 13ftely 10fteN 8ftely 50' Exls6n Pond Mean high ei _ .. .,.� tide line - - Bogue Sound 1 Inch = 40 Feet Land Management Group, Inc. / G� SOILC/ �C, E 7 Ba ?�s� a 0� y'.Yrj l GF� IF t t :' • , l .{ �� 1 .- � C -. 1 Narrative Erosion and Sedimentation Control Plan Stormwater Managcmcnt Plan Fisheries Research Lab and Shop Building October 23, 2001 Owner: University of North Carolina at Chapel Hill CB# 1000,_ 300 South Building Chapel Hill N.C. 27599-1000 (919) 962-3 795 Engineer: Stroud Engineering P.A. 1517A Highway 24 Morehead City N.C. 28557 (252) 247-7479 A. Description of Project 1. Type of Development RECEIVED OCT 2 5 2001 DWQ PROJ # 5WB OI (UZD The proposed project is for the construction of the Fisheries Research Lab and Shop Building located behind the existing UNC/NC State Marine Science building. located at 3134 Arendell Street in Morehead City. Carteret County; North Carolina. The project is to be developed in accordance with the approved plans and specifications for the construction of streets and drainage inprovements. 2. Earth Disturbing Activities it. Clearing and grubbing of trees within the site. Excavation and grading for the installation of parking and drainage improvements. 3. Drainage The sites presently drains primarily to the south to Bogue Sound. (Class SA) The site is designed to continue to drain to the south with the exception of the new impervious area, which will drain to the proposed infiltration system in the parking lot. It Erosion and Sediment Control Measures Various levels of erosion control are proposed on the plan. If it becomes evident that additional erosion and sediment 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 . Silt Pence — Sitt fence will be utilized as necessary in location shown on the plans or as deemed necessary by the engineer to ensure that off -site sedimentation is controlled. 2. Seeding —All disturbed areas will be seeded within 14 days fallowing construction in accordance with the seeding schedule shown on the plans. 3. Energy dissipator Rip Rap 4. Excelsior Erosion control blanket C. Time Sequence of Operation A. — Initial Activities I . Clear and grub site. 2. Rough grade, construct swales, install stormwater collection system. 3. Seed di ainaac swalcs and line with excelsior erosion control blanket. 4. Install water and sewer system. 5. Seed all disturbcd areas except area for building pad within 14 days of disturbance. 13. — Inspection Hold Point Contractor shall not proceed with any impervious surface construction including building foundation, slabs. sidewalks or parking until "Item A" initial activities are completed and a letter from the project engineer indicating that the permit requirements have been met. C. — Final Activities 1. Construct building 2. Construct parking lot, sidewalks, and walkways. 3. Complete installation of remaining underground utilities. 4. Complete Final landscaping. 1). Design Assumption l . Design storm is ten years 2. The rational method was used for design. E. Coastal stormwater Regulations The North Carolina Division of Environmental Management implemented coastal stornnvatcr regulation in coastal counties on .lanuary 1, 1935. These regulations arc detailed in 15 NCAC 21-1.1000 Stormwater Management. These rules allow For a development to be considered under various options. 'file project is submitted for approval consideration under Section .1008(d)(2) (NA CARO�����i =0e�FESSlp1 SEAL 13343 0 '�vGINEE q Ronald D. Culliplter P.E. .1012-314)/ Date