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HomeMy WebLinkAboutSW7071002_CURRENT PERMIT_20080118STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW -&/%Do� DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE- 2m YYYYMMDD WATF90 Michael F Easley. Govemor �0 i �0 William G. Ross Jr, Secretary rNorth Carolina Department of Environment and Natural Resources > p Coleen H Sullins, Director Division of Water Quality January 18, 2008 Town of Kill Devil Hills Attn.: Mr. Shawn Murphy P.O BOX 1719 Kill Devil Hills, NC 27948 Subject: Stormwater Review SW7071002 Kill Devil Hills Public Works, Western Parcel High Density Stormwater Project Dare County Dear Mr. Murphy: The Washington Regional Office received a completed Stormwater Application for the subject project on October 1, 2007. 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. SW7071002 dated January 18, 2008 to Town of Kill Devil Hills for the construction and operation of an infiltration basin to serve the Kill Devil Hills Public Works, Western Parcel located at Western end of Veterans Drive, KIII Devil Hills, NC. 12/3 1/1! This permit shall be effective from the date of issuance until January 18, 2018, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150E of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. 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 Ernest Odei- Larbi or me at (252) 946-6481. Si cerely, Al Hodge, Rglonal Supervisor l Surface Water Protection Section Washington Regional Office AH/sd J:\WPDATA\WQS\Ernest- State SW\Permits -Infiltration cc: John Delucia, P.E., Albemarle & Associates, Ltd. (115 West St. Clair Street, P.O BOX 3989, Kill Devil Hills, NC 27948) Dare County Planning/Inspections Department /Vashington Regional Office Central Files North Carolina Division of Water Quality Internetwww ncwaterguahty ore One 1, 943 Washington Square Mall Phone (252) 946-6481 NOl UtCarOlIIla Washington, NC 27889 Fax (252)946-9215 Naturally An Equal Opportunity/Affrmaave Action Employer- 50%Recycled/10°/ Post Consumer Paper Kvl[ !-L �/ State Stormwater Management Systems Permit No. SW7071002 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 Town of Kill Devil Hills Dare County FOR THE construction, operation and maintenance of stormwater management systems 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 for an infiltration basin to serve the Kill Devil Hills Public Works, Western Parcel located at Western end of Veterans Drive, Kill Devil Hills, NC This permit shall be effective from the date of issuance until January 18, 2018 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 page 3 of this permit, the Project Data Sheet. 3. Approved plans and specifications for this project are incorporated by reference and enforceable parts of the permit. 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. 8. No homeowner/lot owner/developer shall be allowed to fill in, alter, or pipe any vegetative practices (such as swales) shown on the approved plans as part of the stormwater management system without submitting a revision to the permit and receiving approval from the Division. State Stormwater Management Systems Permit No. SW7071002 Project Name: Permit Number: Location: Applicant: Mailing Address: Receiving Stream: Classification of Water Body: a. Site Area, acres: b. C. d. e. f. 9 h. Drainage Area to Basin, ftZ: Total Impervious Surfaces, ftZ: Design Storm, inches: Basins Depth, feet: Bottom Elevation, FMSL: Bottom Surface Area, ftZ: DIVISION OF WATER QUALITY PROJECT DATA Kill Devil Hills Public Works, Western Parcel SW7071002 Dare County Town of Kill Devil Hills P.O. BOX 1719, Kill Devil Hills, NC 27948 Buzzard Bay SC Permitted Storage Volume, ft3: Type of Soil: Expected Infiltration Rate, in/hr: Seasonal High Water Table, FMSL 3.47 DA #1 DA #2 144,740 87,739 71,143 37,757 1 1 1.20 1.20 7.50 7.50 27,222 4,524 35,728 6,544 Corolla-Duckston; Newhan-Corolla Complex 15 15 5.50 5.50 It. SCHEDULE OF COMPLIANCE 1. The permittee will comply with the following schedule for construction and maintenance of the stormwater management system. a. 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 surfaces except roads. 7 State Stormwater Management Systems Permit No. SW7071002 b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 2. The facilities must be properly maintained and operated at all times. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency including, but not limited to: a. Semiannual scheduled inspections (every 6 months) b. Sediment removal C. Mowing and revegetation of side slopes d. Immediate repair of eroded areas e. Maintenance of side slopes in accordance with approved plans and specifications f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping. g. A clear access path to the bypass structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. 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 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. Mail the Certification to the Washington Regional Office, 943 Washington Square Mall, Washington, North Carolina, 27889, attention Division of Water Quality. 7. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the project. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 9. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. 4 State Stormwater Management Systems Permit No. SW7071002 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 12 The stormwater systems shall not be used as Erosion Control devices. They must be kept off line and free from sediment until the project is complete and the entire site has been stabilized 13. This permit shall be effective from the date of issuance until January 18, 2018. Application for permit renewal shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by the processing fee. III. GENERAL CONDITIONS 1. 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. 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- 215.6(a) to 143-215.6(c). 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 permitee 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. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. Permit issued this the 18th day of January 2008. ENVIRONMENTAL MANAGEMENT COMMISSION ,�,Coleen H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission State Stormwater Management Systems Permit No. SW7071002 IGII Devil Hills Public Works, Western Parcel Designer's Certification as a duly registered Professional Engineer 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. Signature Registration Number Date Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The outlet/bypass structure elevations are per the approved plan. 6. The outlet/bypass structure is located per the approved plans. 7. Trash rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9 Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. it. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. LI Y DWQ USE ONLY Date Received Fee Paid Permit Number 11 JAN17 2008 505 1 SW-70-11002 DWQ_WARO State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This fornz 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): Town of Kill Devil Hills 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Mr. Shawn MurRhy, Assistant Town Manager 3. Mailing Address for person listed in item 2 above: City:Kill Devil Hills State:NC Zip:27948 Phone: (252 ) 449-5300 Fax: (252 ) 441-7946 Email:shawn@kdhnc.com 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Kill Devil Hills Public Works, Western Parcel 5. Location of Project (street address): Western end of Veterans Drive City:Kill Devil Hills County:Dare 6. Directions to project (from nearest major intersection): Turn west at intersection of US 158 and SR 1217 (Colington Road), proceed west 0.3 miles to 6th Ave., turn left on 6th Ave and go 0.23 miles to Veterans Drive. Turn right and go 0.6 miles to end of Veterans Drive 7. Latitude:36° 3' N Longitude:75° 40.4' W of project 8. Contact person who can answer questions about the project Name:lohn DeLucia, PE Telephone Number: (252 ) 441-2113 Email:johnd@albal.us II. PERMIT INFORMATION: 1. Specify whether project is (check one): OR ❑Renewal ❑Modification Form SWU-101 Version 8.07 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 and its issue date (if known) 3. Specify the type of project (check one): ❑Low Density ®High Density ❑Redevelop []GeneralPermit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks): ❑CAMA Major ®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 . Stormwater generated from this site will be conveyed via sheetfiow to 2-18" deep dry infiltration basins. The »Lajority of the site improvements sheet drains to a 32,326 SF dry basin located in the southern portion of the site. The remaining gravel and concrete drain toward a basin located to the north. 2. Stoimwater runoff from this project drains to the Pasquotank River basin. 3. Total Site Area: 47.44 acres 4. Total Wetlands Area: 29.25 acres 5. 1W Wide Strip of Wetland Area: n/a acres (not applicable if no wetlands exist on site) 6. Total Project Area":5.06 acres 7. Project Built Upon Area:8.55 % 8. How many drainage areas does the project have?2 9. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Buzzard Bay Buzzard Bay Stream Class & Index No. SC SC Drainage Area (sf) 144,740 87,739 Existing Impervious" Area (sf) 0 0 Proposed Impervious'Area (sf) 1 71,143 37,757 % Impervious' Area (total) 49.2% 43.0% Impervious' Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (sf) 0 0 On -site Streets (sf) 1,203 27,697 On -site Parking (sf) 0 0 On -site Sidewalks (sf) 0 0 Other on -site (sf) 69,940 10,060 Off -site (sf) 0 0 Total (sf): 71,143 37,757 Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. "Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. Form SWU-101 Version 8.07 Page 2 of 10. How was the off -site impervious area listed above derived?From calculations based upon what is proposed. W. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required in the above form, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SW401-Low Density Form SW401-Curb Outlet System Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-Infiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cell Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401-Sand Filter Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bioretention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement Sand Filter Supplement Form SWU-101 Version 8.07 Page 3 of 4 ' t.. r�„q'1'•)}•. .• �f �iJY �. � +...! s ...v r'47'n f..' . ,I: ,... 1.iV'' ,. ., '[.'.�k.�u`t. n, .. .:�• .. .. .II •, I, '.. 1. ..i _, I .• ..Nod. VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the interactive online map at httt)://h2o.enr.state.nc.us/su/msi maps.htm) 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 • Original and one copy of the Deed Restrictions & Protective Covenants Form N JA • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BN • Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/manageme • Copy of any applicable soil report • Three copies of plans and specifications (sealed, signed & dated), including: - Development/Project name - Engineer and firm - Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) 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):Albemarle & Associates, John DeLucia, PE Mailing Address:PO Box 3989 City:Kill Devil Hills State:NC Zip:27948 Phone: (252 1 441-2113 Fax: (252 ) 441-0965 Email:johnd@albal.us VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) Shmon Murphy 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. Signature: Date: �✓ v v M2 Fonn SWU-101 Version 8.07 Page 4 of Permit Number: .5 W 7 0 710 ba, (to be provided by DWQ) Drainage Area Number:I..� ��aD�® Infiltration Basin Inspection and Maintenance Agreement ((jj����� NNYY JAN 17 2008 I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection wiQ-'VAR® corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — The drainage area will be carefully managed to reduce the sediment load to the infiltration basin. — Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the vegetation. — The vegetation in and around the basin will be maintained at a height of approximately six inches. After the infiltration basin is established, it will be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of inspection and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to infiltration basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. The inlet device: pipe or The pipe is clogged (if Unclog the pipe. Dispose of the swale applicable). sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Form SW401-Infiltration Basin I&M-Rev.2 Page 1 of 3 �-, � x_ c:, y L+J `8au v:.� �� t ,�Y _ ��: i- � •:Y -'.� BMP element: Potentialproblem: How I will remediate theproblem: The forebay Sediment has accumulated Search for the source of the and reduced the depth to 75% sediment and remedy the problem if of the original design depth. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred or Provide additional erosion riprap is displaced. protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather than spraying. The main treatment area A visible layer of sediment Search for the source of the has accumulated. sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Replace any media that was removed in the process. Revegetate disturbed areas immediately. Water is standing more than Replace the top few inches of filter 5 days after a stone event media and see if this corrects the standing water problem. If so, rvegetate immediately. If not, consult an appropriate professional for a more extensive repair. Weeds and noxious plants are Remove the plants by hand or by growing in the main wiping them with pesticide (do not treatment area. spray). The embankment Shrubs or trees have started Remove shrubs or trees to grow on the embankment. immediately. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. Form SW40 I -Infiltration Basin I&M-Rev.2 Page 2 of 3 Permit (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Kill Devil Hills Public Works Western Parcel BMP drainage area number: Print name: Shawn Murphy Title: Assistant Town Manager Address: PO Box 1719, Kill Devil Hills, NC 27948 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. I, FAME LA A . Ron CK , a Notary Public for the State of iJC)KM CAROLI JA , County of T�aRE do hereby certify that 6w,w�1 R MuRP"i personally appeared before me this I5n, day of lJnauAR.l Zo06 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, AJ('_ Q. RA' aa«x SEAL My commission expires MAC t z, 7ao9 Form SW401-Infiltration Basin I&M-Rev.2 Page 3 of 3 7 0 Permit Number: S W7071 00 Z. (to be provided by DWQ) Drainage Area Number: & Infiltration Basin Inspection and Maintenance Agreement REGEAVED I will keep a maintenance record on this BMP. This maintenance record will be kept in a JAN 17 2008 log in a known set location. Any deficient BMP elements noted in the inspection will b¢11A1Q_ypl/t/1R® corrected, repaired or replaced immediately. These deficiencies can affect the integrity tli! of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — The drainage area will be carefully managed to reduce the sediment load to the infiltration basin. — Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the vegetation. — The vegetation in and around the basin will be maintained at a height of approximately six inches. After the infiltration basin is established, it will be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of inspection and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element- Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the infiltration basin Areas of bare soil and/or erosive gullies have formed. Regrade the soil if necessary to remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. The inlet device: pipe or Swale The pipe is clogged (if applicable). Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future roblems with erosion. Form SW401-Infiltration Basin 1&M-Rev.2 Page 1 of 3 ry �n n� nl�'j � � i'{: �I,; _sue � ':r. � , 7 ' �. � , BMP element: Potentialproblem: How I will remediate theproblem: The forebay Sediment has accumulated Search for the source of the and reduced the depth to 75% sediment and remedy the problem if of the original design depth. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred or Provide additional erosion riprap is displaced. protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather than spraying. The main treatment area A visible layer of sediment Search for the source of the has accumulated. sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Replace any media that was removed in the process. Revegetate disturbed areas immediately. Water is standing more than Replace the top few inches of filter 5 days after a storm event. media and see if this corrects the standing water problem. If so, revegetate immediately. If not, consult an appropriate professional for a more extensive repair. Weeds and noxious plants are Remove the plants by hand or by growing in the main wiping them with pesticide (do not treatment area. spray). The embankment Shrubs or trees have started Remove shrubs or trees to grow on the embankment. immediately. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs re air. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. Fonn SW401-infiltration Basin I&M-Rev.2 Page 2 of 3 Permit (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Kill Devil Hills Public Works Western Parcel BMP drainage area number: Print name: Shawn Murphy Title: Assistant Town Manager Address: PO Box 1719 Kill Devil Hills NC 27948 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. I, PAMEtq A. R,00,crc a Notary Public for the State of f.{(3RTH CARC) ,WA , County of DARE , do hereby certify that SAW 4 R . ML RPH. personally appeared before me this 15'� day of UnHana,I 2co8 and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, e �;, Hid s �':pUBItC. SEAL My commission expires MA,. i Z z009 4"'J0. Q . 4clat -x Form SW40 I -Infiltration Basin I&M-Rev.2 Page 3 of 3