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HomeMy WebLinkAboutSW8020908_CURRENT PERMIT_20030212STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW �-7P) /l �ilT I DOC TYPE CURRENT PERMIT `❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE �v�jOdlrih YYWMMDD s OF W A T&- `Q� QG 7 r Mr, Joseph Barwick, President Carteret Community College 3305 Arendell Street Morehead City, NC 28557 Dear Mr. Barwick: Michael F. Easley, Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality Wilmington Regional Office February 12, 2003 Subject: Permit No. SW8 020908 Wayne West and Marine Technology Buildings High Density'Stormwater Project Carteret County The Wilmington Regional Office received a complete Stormwater Management Permit Application for Wayne West and Marine Technology Buildings on February 11, 2003. 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 020908 dated February 12, 2003, for the construction of Wayne West and Marine Technology Buildings. This permit shall be effective from the date of issuance until February 12, 2013, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this pennit 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 pen -nit 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, L Rick Shiver Water Quality Regional Supervisor RSS/arl: S:1WQSISTORMWATIPERMIT1020908.FEB 03 cc: Vincent Chirichella, P.E. Morehead City Building Inspections Division of Coastal Management Linda Lewis Wilmington Regional Office Central Files ANA NCDEN t 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 State Storn3Nvater Management SvstenlS Permit No. SWS 02090S STATE OF NORTH CAROLINA DEPART.NIENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF \'VATER QUALITY STATE STORIVIWATER 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 Contnnnrity College Wayne West and Marine Technology Buildings Carteret County FOR THE construction, operation and maintenance of an 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 February 12, 2013, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS l . 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 129,113 square feet of impervious area. The excess desi4n storm must pass through a 50' vegetated filter prior to discharge. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance.with the approved plans. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 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 Stonnwater Manai-,ement Svstems Permit No. SWS 020905 10. The pennittce 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 amount permitted under this permit, a modification to the permit must be submitted and approved prior to construction. 11. 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. 12. 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. 13. The permittee must maintain compliance with the proposed built -upon area and ensure that the runoff from all the built -upon is directed into the permitted system. 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 Fhe changes have been made. 15. The permittee must maintain the current permitted drainage area. No additional runoff from outside of the permitted drainage area boundary may enter the permitted stormwater facilities without first applying for and receiving a permit modification. 16. The storage pond may not infiltrate. A clay liner must be provided in the storage pond. 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 transfer 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. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) 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. 5 State Stormwater Management Systems Pen11it..No -.-,,S,\ 8 02090Sr . - .=-. Un€ess 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. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 9. The permittee shall notify the Division any name, ownership or mailing address chancres within 30 days. Permit issued this the 12th day of February, 2003. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Z State Stormwater Management Systems Permit No. S\V8 020908 Wayne West and Marine Technology Buildings Stornrnvater Permit No. SWS 02090S Carteret County Designer's Certification as a duly registered 4. in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL 7 0 Certification Requirements: State Stonzi\N'ater Managemeiit Systems Permit No. SNVS 02090S _1. The drainage area to the system contains approximately the permitted acreage. ?. 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. S. 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 Morehead City Building Inspections OFFICE USE ONLY Date Received Fee Paid Permit Number 11 --6--02 A , IZ 1q-a2 -$¢ZO60 oo0015&o 1 Sw8 020908 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 corporation, individual, etc. who owns the project): Carteret Community College 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Joseph Barwick, President 3. Mailing Address for person listed in item 2 above: 3305 Arendell Street City: Morehead City State: NC Zip: 28557-2989 Telephone Number: ( 252 } 222-61,40 — h. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Carteret Community College Additions & Renovations S. Location of Project (street address): 3305 Arendell Street City: Morehead City County:___Carteret 6. Directions to project (from nearest major intersection): North on Atlantic Beach Causeway, Left onto Highway 70 leading West, Left onto College Circle. 7. Latitude: N340 43.4' Longitude: W760 45.5 ` of project 8. Contact person who can answer questions about the project: Name: Vincent Chirichella Telephone Number: L9191 ) 3 8 0 — 8 7 5 0 II. PERMIT INFORMATION: 1. Specify whether project is (check one) X New Renewal Modification Form SWU-101 Version 399 Page I of 4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit 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 Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. in the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project . T' , r, F 1 }i First 1z.%of rainfall will be captured in sedimentation/detention basin to then be pumped to an infiltration basin. All other stormwater will bypass into a 50' vegetated filter to then discharge into Bogue Sound. -- - 2. Stormwater runoff from this project drains to the White Oak River basin. 3. Total Project Area: 8.986 acres 4. Project Built Upon Area: 39.3 % 5. How many drainage areas does the project have? 1 ' 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 '' Drainage Area 1 Drainage Area 2 ` _ Receiving Stream Name Bogue Sound Receiving Stream Class SA Drainage Area 232,665 sq. ft. Existing Impervious` Area 15,689 s q. f t. Proposed Impervious`Area 113,424 s q. f t. % Impervious" Area (total) 55.3 % Impervious*.Surface Area , Drainage Area 1 Drainage Area 2'! . On -site Buildings 56,402 sq.' ft.' On -site Streets ______________ On -site Parking 57,439 sq . f t . On -site Sidewalks 7,677 sq . f t . Other on -site 7,595 s q. f t. Off -site __________________ Total: 129,113 s q . f t . Total: 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 Page 2 of 4 7. How was the off -site impervious area listed above derived? Delineation of site survey With field verification. 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: 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 requires 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 Iot. 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 Storinwater 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 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 sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent (individual or firm): Stei-rart Engineering, Inc. (Attn: Vince Chirichella) Mailing Address: P.O. Box 1 2-054 City: Research Triangle Par'c State: NC Zip: '27-709 Phone:( 919 ) 380-8750 Fax: 919 380-8752 VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in Genera! Information, item 2) Joseph Bandcic 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\ i Signature: Date: F.o)6-0 Form SWU-101 Version 3.99 Page 4 of 4 Permit No. SW8 020908 (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This 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 infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. 1. PROJECT INFORMATION ProiectName: Carteret Community College Additions & Renovations Contact Person: A.T. Rhu e Phone Number: (2 5 2 ) 22 2 -- 619 8 This worksheet applies to: Basin No. 1 (as identified on plans) in Drainage Area 1 . (from Ponn SWU-tot) 11. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Infiltration Rate SHWT Elevation Basin Design Parameters Design Storm Design Volume Drawdown Time Basin Dimensions Basin Size Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation Wando 3 in/hr or eflhr/sf (circle appropriate writs) 10.0 fmsl (Seasonal High Water Table elevation) 1.5 inch (I.S inclr event for SA raters, 1 inch event for others) 15,925 c.f. 4.5 days ft. x 16,011 c.f. 18.00 fmsl 20.90 fmsl 21.00 fmsl ft. = 4 , 239 sq. ft. (bortoin dimension+) Form SWU-103 Rev 3.99 Page 1 of 3 III. REQUIRED ITEMS CHECKLIST ®The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) 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 a. 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. e. System is not sited on or in fill material or DWQ approval has been obtained. puewc ?APK&Nf. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. S66 Sotim q g. Drainage area for the device is less than 5 acres. 5EE i,loTt h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached.iSo&L& Waver ATYA-ACD• AME"'OBo fWao r ?c,amiu . • ii i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for OV areas draining to SA waters ). Design volume and infiltration calculations attached. j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. • i r- All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). Flow distribution mechanism within the basin is provided. A benchmark is provided to determine the sediment accumulation in the pretreatment device. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. A soils report and till pertinent draw -down calculations are attached. 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. Form SWU-[03 Rev 3.99 Page 2 of 3 0 • IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment 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 duality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. 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 design depth reads 4 feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. �5. If the Division determines that the system is failing, the system will immediately be repaired 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. I acknowledge and agree by my signature below that I am responsible for the performance of the five 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:_ se-� _ru)'t c k ?TCS i cieri Ca�ereA l bmmkn Address:,3505 MC,, hMA, C'%t IJ C a fss-] 1 Phone: (DSa) 0, f Y0 _ Date:___ Signatu Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. 1, _U�� �, Sm. t a Notary Public for the State of 00(4\ Caro�If\0 , County of CarA e.fe a- do hereby certify that J Se, af-u. U personally appeared before me this a� day of + , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. vditness my ha'd and official seal, SEAL - My commission expires Form S W O-103 Rev 3.99 Page 3 of 3 W ATFR Michael F. Easley, Governor �a Q William G. Ross Jr., Secretary ' G North Carolina Department of Environment and Natural Resources co y > Alan W. Klimek, P.E.,Director Division of Water Quality Coleen H. Sullins, Deputy Director Division of Water Quality February 27, 2004 Mr. Joseph Barwick, President Carteret Community College 3305 Arendell Street Morehead City, NC 28557 Subject: Permit No. SW8 020908 Wayne West and Marine Technology Buildings High Density Stormwater Project Carteret County Dear Mr. Barwick: The Wilmington_ Regional Office received a complete, modified Stormwater Management Permit Application for.Wayne West and Marine Technology Buildings on February 13, 2004. 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 020908 dated February 27, 2004, for the construction of Wayne West and Marine Technology Buildings. This permit shall be effective from the date of issuance until February 27, 2014, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611- 7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at (910) 395-3900. Sincerely, �c-- V- Rick Shiver Water Quality Regional Supervisor RSSIarl: S:IWQSISTORUIWATIPERMIT1020908.feb04 cc: Vincent Chirichella, P.E., Stewart Engineering Ron Cullipher, P.E., Stroud Engineering Morehead City Building Inspections Division of Coastal Management Linda Lewis Wilmington Regional Office Central Files N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1 800 623-7748 NCDENR State Stormwater Management Systems Permit No, SW8 0209n 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 Community College Wayne West and Marine Technology Buildings Carteret County FOR THE construction, operation and maintenance of an 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 February 27, 2014, and shall be subject to the following specified conditions and limitations: I. 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 in Part 6 of this Section of the permit. The stormwater control has been designed to handle the runoff from 135,864 square feet of impervious area. The design storm in excess of 1.5" must pass through a 50' vegetated filter prior to discharge. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 4. 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. 5. The runoff will drain by gravity through two separate manholes, to an unlined storage pond, where it will be pumped via a forcemain to the infiltration basin at a maximum rate of 60 gpm. The storage elevation in the storage pond is elevation 9. The incoming runoff in excess of the 1.5" design storm in the storage pond will flow over the bypass weirs and into the vegetated filter. Page 2 of 8 State Stormwater Management Systems Permit No. SW8 020908 6. The infiltration basin and storage pond must provide the following criteria, in accordance with the design requirements: a. Receiving Stream/index #: Bogue Sound WOK03 20-36-(8.5) b. Classification of Water Body: "SA" C. Proposed System: Infiltration Basin wl separate storage pond d. Drainage Area, acres: 5.34 Onsite, ft2: 232,665 Offsite, ft2: 0 e. Total Impervious Surfaces, ft2: 135,864 Infiltration Basin Storage Pond f. Basin Depth, feet: 3.15 4.0 g. TSS removal efficiency: 85% (a 50' vegetated filter is required) h. Bottom Elevation, FMSL: 17.75 5.0 i. Permitted Surface Area, ft2: 4,035 @17.75 15,902 @8.0 j. Permitted Storage Volume, ft3: 17,046— 16,795 k. Temporary Storage Elevation: 20.9 FMSL 9.0 I. Controlling Orifice: Bypass weir Pump to basin M. Type of Soil: Wando n. Expected Infiltration Rate: 3 inches per hour o. Time to Draw Down: 4.5 days P. Seasonal High Water Table Elevation: . 15.5 FMSL II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The 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. 4. If the stormwater system is 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. Page 3 of 8 State Stormwater Management Systems Permit No. SW8 020908 5. 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 all vegetated slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of infiltration basin filter media, forcemain, pump, outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the structures in the storage pond and infiltration basin must be available at all times. h. The pump to the infiltration basin must be maintained in good working order. 6. 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. 7. A decorative spray fountain will be allowed in the storage pond, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. C. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for the fountain's pump is based on the permanent pool volume. The maximum pump power for a fountain in this pond is 1/8 horsepower. 8. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 9. The permittee shall submit final site layout and grading plans for any permitted future development areas shown on the approved plans, prior to construction. If the proposed BUA exceeds the amount permitted under this permit, a - modification to the permit must be submitted and approved prior to construction. 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. - 11. The permittee must maintain compliance with the proposed built -upon area and ensure that the runoff from all the built -upon is directed into the permitted system. Page 4 of 8 State Stormwater Management Systems Permit No. SW8 020908 12. 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, but not limited to, the Stormwater management measures, built -upon area, details, grading, 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 or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 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. 14. The permittee must maintain the current permitted drainage area. No additional runoff from outside of the permitted drainage area boundary may enter the permitted stormwater facilities without first applying for and receiving a permit modification. 111. MONITORING CONDITIONS 1. Three monitoring wells shall be installed to monitor the top of the water table, factoring in the seasonal low. One shall be located up -gradient of the pond in an undisturbed, natural area, and the other two down -gradient of the pond. The wells will be monitored once a month (on approximately the same day of the month) for a period of twelve months. Upon receipt of the permit, the monitoring wells must be installed. Sample collection will begin the first of the month following installation. 2.- The monitoring well samples will be tested for the following parameters using generally accepted Standard methods: a. Static water level to 0.01 feet, relative to land surface. b. TSS ' c. Nitrates d. Total Phosphorous e. Fecal Coliform 3. Samples must be collected by either a certified Wastewater Treatment Facility operator, or a similarly trained person. 4. Testing of the samples will be conducted by a State Certified Laboratory. Copies of the lab sheets must be submitted to the Division within 30 days. 5. - The permittee shall submit quarterly reports to the Division of Water Quality, which summarize the results of the previous three months of testing. The reports are due within 30 days of receiving the last test results from the laboratory. Page 5 of 8 State Stormwater Management Systems Permit No. SW8 020909 6. The Division will analyze the data at the end of 12 months. Should the data, reveal violations of groundwater or water quality standards, the storage pond will' be lined with an impermeable lining material to be approved by the Division. Should the data reveal only slight violations of groundwater or water quality standards, the Division and the permittee shall meet to decide if the sampling shall continue for another year, or if the requirement to line the pond can be deleted. IV. GENERAL CONDITIONS 1. This permit is not transferable except after notice to and approval by the Director. 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 transfer 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. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) 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'. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the .permit. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. Permit issued this the 27th day of February, 2004. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Division of Water Quality By Authority of the Environmental Management Commission Page 6 of 8 State Stormwater Management Systems Permit No. SW8 020908 Carteret Community College Wayne West and Marine Technology Buildings Stormwater Permit No. SW8 020908 Carteret County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 7 of 8 State Stormwater Management Systems Permit No. SW8 020908 Certification Requirements: . 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. 1�. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DWQ Regional Office Morehead City Building Inspections Page 8 of 8 .,rv.,"OFFICE-USE ONLY.:," Date Received Fee Paid Permit Number Zij g v� q vS nL- 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 corporation, individual, etc. who owns the project): Carteret -Community College 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Joseph Barwick, President 3. Mailing Address for Person listed in item 2 above: 3305 Arendell Street City: Morehead City Telephone Number: ( 252 ) 2 2 2— 614 0 State: NC Zip: 28557-2989 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): .Carteret Community College Additions and Renovations 5. Location of Project (street address): .., .ry P, 3305 Arendell Street City: Morehead City County: Carteret 6. _ Directions to project (from nearest major intersection): - = Causeway,- Nnrt-.'h_on_AtlantJc Reach Left onto-...Hi"way 70 leading West Loft onto College Circle. 7. Latitude: N 34Q 43 .4Longitude: W 7C 4 5 . 5 ' of project 8. Contact person who can answer questions about the project: Name: Vince Chirichella Telephone Number: ( 919 ) 380-8750 II. PERMIT INFORMATION: 1. Specify whether project is (check one): New Renewal X Modification Form SWU-101 Version 3.99 Page 1 of 4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number SW8 020906 and its issue date (if known) 3. Specify the type of project (check one): Low Density X High Density Redevelop 4. Additional Project Requirements (check applicable blanks): General Permit Other �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 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 . First 1 1/21, of rainfall will be captured in sedimentation/detention basin. to',,then; be�--pumped to- an,-infiltrationTbasin. All other stormwater will bypass into a 50' vegetated filter to then discharge into Boque Sound. 2. Stormwater runoff from this project drains to the White 0 a k River basin. 3. Total Project Area: 8..986 acres 4. Project Built Upon Area: 41.0 5. How many drainage areas does the project have? 1 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. Bas�ntInformationE �i�.Draina e Area qn,a; k i'F EL':,ypDraina e�Areaµ2 :„1,w,'.' Receiving Stream Name Bogue Sound Receiving Stream Class SA Drainage Area 232,665 ' sq. ft. Existing Impervious` Area 15 , 6 89 - sq . f t . Proposed Impervious*Area f t . 35 g(� %Impervious* Area (total) 58.4 % m Ipervtous5urface AreaM Drainage Area'1 '�5� ,,,., x: a.b:: �, +, .. M. n{s •� D-" '' e `Area! , „ ,., .. a, �,: g,�,. On -site Buildings 56,402 s :ft . On -site Streets On -site Parking 62,536 s. f t. On -site Sidewalks 9,331 s q. f t. Other on -site 7,595 s q. f t. Off -site Total: 135,864 sq . f t . Total: 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 Page 2 of 4 How was the off -site impervious area listed above derived? Deli neat ion of Site survey with field verification. 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. 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. 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 requires a state stormwater management permit modification prior to construction. S. 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 JMP specified for this project. Contact the Stormwater and Qenera_I 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 1 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. I. 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 Forni(s) 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 nurnbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent(individualorfirm):Stewart Engineering, Inc. (Attn: Vince Chirichella) Mailing Address: 260 - C Town Half. Drive City: Morrisville State: NC Zip: 27560 Phone: ( 919 ) 380-8750 Fax: ( 919 ) 380-8752 VIII. APPLICANT'S CERTIFICATION I,(printortype nameofpersonlisted inGeneral Information, item 2) Joseph Barwick 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 ..1-0[ Signatu Date: // - D % - 0A l Form SWU-101 Version 3.99 Page 4 of 4 i e Permit No. 4) 3 U yD sr /x'01) (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ_Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name: Carteret Community College Additions & Renovations Contact Person: A.T. Rhue Phone Number: (252) 222-6198 This worksheet applies to: Basin No. 1 in Drainage Area 1 (us idenrffied on ptuns) (from Farm SWU-101) II. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Infiltration Rate SH WT Elevation Basin Design Parameters Design Storm Design Volume Drawdown Time Basin Dimensions Basin Size Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation Wando 3 l/h or cflhrlsf (circle appropriate units) 15.50 fmsl (Seasonal High Water Table elevation) 1.5 inch (1.5 inch event for SA waters, 1 inch event for others) 16,736 c.f. 4 5 days ft. x 17,046 c.f. 17.75 fmsl 20.90 fmsl 21.00 fmsl ft. = 4,035 sq. ft. (bonoin diinensions) Dorm SWU-103 Rcv 3.99 Page l of 3 III. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 214 .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. APRlicants Initials a. b. C. d. e. System is located 50 feet from class SA waters and 30 feet from other surface waters. System is located at least 100 feet from water supply wells. Bottom of system is at least 2 feet above the seasonal high water table. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. System is not sited on or in fill material or DWQ approval has been obtained. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. Drainage area for the device is less than 5 acres. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). A pretreatment device such as a catch basin, grease trap, filter strip, grassed Swale or sediment trap is provided. m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). o. Flow distribution mechanism within the basin is provided. p. A benchmark is provided to determine the sediment accumulation in the pretreatment device. q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). r. S System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. A soils report and all. pertinent draw -down calculations are attached. 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. Form SWU-103 Rev 3.99 Page 2 of 3 IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT . After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment systern and infiltration basin annually or when depth in the pretreatment 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 pretreatment unit. 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 design depth reads 7.5 feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. If the Division determines that the system is failing, the system will immediately be repaired 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. I acknowledge and agree by my signature below that I am responsible for the performance of the five 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: Joseph Barwick, President Carteret Community College Address: 3305 Arendel.l St. , Morehead City, NC 28557 Phone: 222-6140 Date:. 11` q_c)3 Signatu Note: The legally responsible party should not be a honeowners association runless more than SO% of the lots have been sold and a resident of the subdivision has been awned the president. I, 77o kxQ e_ -A�) . 5!m+;ON a Notary Public qf 011� for the State of 00r4N C0l,, County of `, r+C - , do hereby certify that ZQSCO V-�i�Gf W lC% personally appeared before me this qk day of J-X)C�3 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness ni • lid and official sell, SEAL � t 1�� My commission expires 1 f Forn SWU-103 `Rev 3.99 Page 3 of 3 "'91 A 001A Itomor ILVI -vve� ri AAPR OVED NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DIVISION OF WATER QUALITY 2-7 - F7EF8 - -zcx) 4 jl / sme fX11 am 206 I!® wrt ItIf 100 J f� MGNITORING WELL PLAN CARTERET COMMUNITY COLLEGE SCALE" 1"= 100' 6110N[TORING WELLS kWstl UP GRADIENV �k 0 .s 0 ����: es'91. . 0 003 DOWN GRARIENT-�- SEAL r 13343 0 STROUD ENGINEER MEDt, ULVNI 151A HIGHWAY 24 HEAD CITY, N.C. 28557 (4-2) 47 7470 NAL L L I YPH 167. —E.