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HomeMy WebLinkAboutSW8010631_CURRENT PERMIT_20030902STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. I SWla&�� DOC TYPE � CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE- YYYYMMDD OF WArFR Michael F. Easley, Governor QG William G. Ross Jr., Secretary 0 North Carolina Department of Environment and Natural Resources co (&Alan W. Klimek, P.E.,Director p Division of Water Quality Coleen H. Sullins, Deputy Director Division of Water Quality September 2, 2003 Mr. Earl Hanna, President First Original Free Will Baptist Church, Inc. 453 College Street Jacksonville, NC 28540 Subject: Permit No. SW8 010631 First Original Free Will Baptist Church High Density Stormwater Project Onslow County Dear Mr. Hanna: The Wilmington Regional Office received a complete, modified Stormwater Management Permit Application for First Original Free Will Baptist Church on August 26, 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 010631 dated September 2, 2003, for the construction of First Original Free Will Baptist Church. This permit shall be effective from the date of issuance Until September 2, 2003, 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 2761.1- 7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at (910) 395-3900. Sincerely, Rick Shiver Water Quality Regional Supervisor RSS/arl: S:1WQSISTORMWATIPERMIT1010631.sep03 cc: Dave Newsom, P.E. City of Jacksonville Building Inspections Linda Lewis Wilmington Regional Office Central Files IMN N. C. Division of Water ouality 127 Cardinal Drive Extension (910) 395-3900 Customer Service XM Wilmington Regional Office Wilmington, NC 28405 (910) 350-200.4 Fax 1 800 623-7748 �yCDEfV$ State Stormwater Management Systems Permit No. SW8010631 Modification 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 Earl Hanna, First Original Free Will Baptist Church, Inc. First Original Free Will Baptist Church Onslow County FOR THE construction, operation and maintenance of a wet detention pond 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 September 2, 2013 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 184,796 square feet of impervious area. This pond must be operated with a 30' vegetated filter. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 5. 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. PA State Stormwater Management systems Permit No. SW8 010631 Modification Project Name: Permit Number - Location: Applicant: Mailing Address: Application Date: DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET First Original Free Will Baptist Church SW8 010631 Name of Receiving Stream/Index #: Classification of Water Body: Pond Depth, feet:. Permanent Pool Elevation, FMSL: Drainage Area, acres: Onsite: Offsite: Total Impervious Surfaces, ft2: Provided Surface Area, ft2: Provided Design Storage Volume, ft3: Temporary Storage Elevation, FMSL: Controlling Orifice: Onslow County Mr. Earl Hanna, President First Original Free Will Baptist Church, Inc. 453 College Street Jacksonville, NC 28540 November 30, 2001 Modified August 26, 2003 White Oak 1 UT Mill Creek 1 WOK02.19-9 "SC NSW" 5.50 15.00 5.97 5.97 0 184,796 (including 10,000 ft2 of future BUA) 8,845 @permanent pool 14,945 16.52 1.5"� pipe (draw down in 2-5 days) 3 State Stormwater Management Systems Permit No. SW8010631 Modification II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in it's entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping. g. Access to the outlet structure must be available at all times. h. The vegetated filter will be kept grassed with no erosion. The spreader mechanism will be kept free of sediment and trash, and must distribute the runoff evenly over the width of the filter. - 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 6. Decorative spray fountains will not be allowed in the stormwater treatment system. 6. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. 8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 4 State Stormwater Management Systems Permit No. SW8010631 Modification 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 the approved plans, regardless of size. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area. e. Further subdivision, acquisition, or sale of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for the 10,000 ft' of permitted future built -upon area shown on the approved plans, for approval prior to construction. If the proposed BUA exceeds the pemitted amount, 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. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. 13. Prior to the sale of any portion of the property, an access/maintenance easement to the stormwater facilities shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale of any portion of the property. 14. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon area. 15. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable 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 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 Director approves the transfer request. State Stormwater Management Systems Permit No. SW8010631 Modification 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 DEN Staff permission to enter the property for the purpose of inspecting all.components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Permit issued this the 2"d day of September, 2003. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION h .L tit A, Alan W. Klimek P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 010631 E State Stormwater Management Systems Permit No. SW8010631 Modification First Original Free Will Baptist Church Stormwater Permit No. SW8 010631 Onslow County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically 1 weekly 1 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 State Stormwater Management Systems Permit No. SW8010631 Modification Certification Requirements: _1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. The outlet/bypass structure elevations are per the approved plan. .5. The outlet structure is located per the approved plans. 6. Trash rack is provided on the outlet/bypass structure. 7. All slopes are grassed with permanent vegetation. .8. Vegetated slopes are no steeper than 3:1. 9. The inlets are located per the approved plans and do not cause short- circuiting of the system. 10. The permitted amounts of surface area and/or volume have been provided. 11. Required drawdown devices are correctly sized per the approved plans. 12. All required design depths are provided. 13. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 14. The overall dimensions of the system, as shown on the approved plan, are provided. CC: NCDENR Wilmington Regional Office City of Jacksonville Building Inspections D 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): First Original. Free Will Baptist Church Inc. 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance). Earl Hanna, President 3. Mailing Address for person listed in item 2 above: 451 a City: rar-kenr,ir� 1 ZP_ _ _ _ State:_ NC Zip: 28540 Telephone Number: ( 910 1 _347-2358 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name an plans, specifications, letters, operation and maintenance agreements, etc.): First Ori final Free Will Baptist Church' 5. Location of Project (street address): _l ocn ed oD NCSR 1308 (Gum Branch Road) City: Jacksonville Onslow County: 6. D irections to project (from nearest major intersection): from intersection of US Highway 17 & NC Highway 24, North on U5 Highway 17 approximately 1.40 miles to NCSR 1308(Gum Branch Rd.) left on Gum B 0.60 miles, site on left 7. Latitude: 34degreas 46' " Longitude :77degrees 24' 30" _ of project S. Contact person who can answer questions about the project. Nalne: John L. Pierce & Associates, P.ATelephoneNumber: { 910 1,340-9800 David Newsom - H. PERMIT INFORMATION: 1. Specify whether project is (check ones): New Renewal XX Modification Form SWU-101 Version 3.99 Page 1 of4 approx irta t al 211 this application is being submirted as the result of a renewal ar modification to an existing pe7 t. }�{ t the existing permit number `;w. m 0631^ _ _ — _ _ and its issue date (if known) 1 , 8T 3. Specify the type of project (check one): Low Density X`K HsghDensity Redevelop General Permit Other 4. Additional Proiec[ lRE! irarieats (cneciC applicable blanks): _____CAi�1AMajor 'c• Sedimentation/Erosion Control _404/401 Perr_ut XX NPDES Storrnwater (City of Jacksonville) (City of Jacksonville) Information on regklired state permits can be obtained by conmczLng the Customer Service Center at 1-677-62;-674& III. PROJECT F TFORMATION i. In the space provided below, sumrnarize how storrawater xiH be treated. Also attach a detailed narrative (one to two pages) describing storm -water management for the project . Stormwater will be collected and conveyed: to a wet detention _pond for treatment Z. Stormwater runoff from this project drains to die White Oak (New River) River hasin. 3. 'Total Project Area: nacres 4. Project Built Upon Area: 5. How many drainage areas does the project have? 1 6. Complete the folloMng infornzatian 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. `Receiving Stream Name UT lull 11. Creep Receiving Stream Class SC NSW Drainage Area A { ~misting Ilnpetvious ?aea NIA Proposed impervious*AreaLi- °A Intoentious` Area (total) / '= On -sate Buildings 49,844 s . f . On -site Streets oil -site Parking 118.832 s . f. On -site Sidewalks r) q Odle" ""te(dunester DaA) 149 s.f. Totai p ik 7 Total: ` hii'oen ions area is dadDed as Oe built upon area lnctuc ing, but not lil ted ro, buildings, road;, sidewalks, ,gravel areas, etc. Form SWU-101 Version 3.99 Pao_ 2 of 4 IVED APR 4 # 2503 DWQ pROJ # 7. Plow was the off -site impervious area listed above derived? N/A IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number-, size and the allowable built -upon area for each lot must be provided as an atuachment. I. The full owing covenants are untended to ensure ongoing compliance with state stormwater management permit number as issued by time Division of Water Quality. These covenants may not be dranged or deleted without the consent of time State. Z. No amore tlm, square feet of any lot shall be. novel ed by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decUng or the water surface of swimming pools. 3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings. 1. Built -upon area in excess of the permitted amount requires a state stornnwater management permit nmodifrcation prior to construction. 3. All permitted runofffrom outparcels or future development shall be, directed into the permitted storrmwater control s35ten7- These connections to time storrnwater 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 «rill be recorded prior to the sale of any lot- V. SUPPLEMENT FORMS The applicable state storrnwater rrranagernent 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 acid availability of these forms. Form SWU-102 Wet Detention Basin Supplement Form SW U-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, Please indicate that you have provided the fallowing required information by initialing in the space provided next to each item. Tnit" Is - Original and one copy of the Stormwater Management Permit Application Form One copy of the applicable Supplement Form(s) for each BMP • Permit application processing fee of $420 (payable to NCDENR) - Detailed narrative description ofstorrnwater treatment/managcmerit - Two copies of plans and specifications, including: 1 - Development/Project name Engineer and firm -Legend - North arrow Scale - Revision number & date Mean high crater line Dimensioned property/project boundary - Location map wide named streets or NCSR numbers Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormvtrater control measures Wetlands delineated. or a note an plans that none exist Existing drainage (includirg off -site), drainage easements, pipe sizes, runoff calculations Drainage areas delineated -Vegetated buffers (where required) VH. 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): John L. Pierce & Associates P.A. Mailing Address: P.O. Box 128 CitT Jacksonville State: NC Zip: 28540 Fax: ( 910J346-1210 VHI. APPLICANT'S CERTIFICATION 1, (print or type name ofpe-son listed in General Information, item 2) Earl Hanna certicy that the inforniation 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 recorde and that the proposed project complies with the requirements of 15A NCAC 2H .1000, f Signature: ' Date: �l Form SW U-101 Version 3.99 Pace 4 of 4 Permit No. SW8 010631 (to be provided by DW2) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORIvIW ATER 1vb NAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQStorrnwater lyianaaement Plan Review: A complete stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, desip calculations, and plazas and specifications showing all basin and outlet structure details. I. PROJECT INFORMATION Project dame: Fist nri of na 1 Free Will Baptist Chz zrrh Contact Person: rr Phone dumber: (g1 n ) ` 46- 9800 _ v Newsom For projects with rri tip�easms, specify which basin this workshect applies to: Nf A_ elevations Basin Bottom Elevation 9.50 ft. (floor of the basin) Permanent Pool Elevation . 15.00 ft. (elevation of the orifice) Temporary Pool Elevation 16.52 ft. (elevation of the discharge structure overflow) areas 'Permanent Pool Surface Area 8845 _ sq. ft. (water surface area at the orifice elevation) Drainage Area 5.97 ac. (on -site and off -site drainage to the basin) Impervious Area 4. 24- -; ac. (on -site and off -site drainage to the basin) ,`includes 10,000 s.f. of allowance for future volumes expansion Permanent Pool Volume Z1162 S cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 1' O +5 B ! cu. ft. (volume detained above the permanent pool) Forebay Volume i 150 -67fs66 cu. ft. (approximately 20% of total volume) Other parameters SAMAI 3. 344% (surface area to drainage area ratio from DYYO table) Diameter of Orifice 1. 5 in. (? to -5 day temporary pool draw -down required) Design Rainfall 1 in. Desian TSS Removal' 85 % (minimum 85 % required) Form SWU-102 Rev 3.99 Pa-e 1 of 4 Footnotes: When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non- standard table entries. 2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90% TSS removal. The NCDENR Blvd' manual provides design tables for both 85% TSS removal and 90% TSS removal. II. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Nafurai Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate 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. If a requirement has not been met, attach justification. Appl' is Initials % a 17 C. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). The forebay volume is approximately equal to 20% of the basin volume. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) f. The basin length to width ratio is greater than 3.1. g. The basin side slopes above the permanent pool are no steeper than 3:1. h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). i. Vegetative cover above the permanent pool elevation is specified. j. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin. m. A mechanism is specified which will drain the basin for maintenance or an emergency. M. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided_ This system (check one) does 0 does not incorporate a vegetated filter at the outlet. This system (check one) 0 does woes not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After. every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 4.13 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4.13 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM {fill in the blanks) 0 Permanent Pool Elevation 15.00 Sediment Re oval E1.10.87 75 a ------------- Sediment Removal Elevation 10.87 75% - Bottom Ele ation . �0 °/a----------------�------------------'-_--------------`- Bottom Elevation _q 5n 25% / FOREBAY MAIN POND 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These LD plants shall be encouraged to grow along the vegeetated shelf and forebay berm. 6. If the basin must be drained for an emergency or to perform maintenance,. the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. Form SWU-102 Rev 3.99 Page 3 of 4 ' 7. All components of the wet detention basin system shall be maintained in good working order. I acknowledge and agree by my signature below that I am responsible for the performance of the seven 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: Earl Hanna Title: President Address:Jacksonville, NC 28540 Note: The legally responsible parry 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, Betty Bullock _ _ , a Notary Public for the State of North Carolina County of Onslow , do hereby certify that Earl Hanna personally appeared before me this 10 day of January 2003_, and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hared and official seal, SEAL My co 7 n expires 2/28/03 Form SWU-102 Rev 3.99 Page 4 of 4 (viichael F. Easley, Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality Wilmington Regional Office December 7, 2001 Mr. Earl Hanna, Pastor First Original Free Will Baptist Church 453 College Street Jacksonville, NC 28540 Subj ect: Permit No. S W 8 010631 First Original Free Will Baptist Church High Density Stormwater Project Onslow County Dear Mr. Hanna: The Wilmington Regional Office received a complete Stormwater Management Permit Application for First Original Free Will Baptist Church on November 30, 2001. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 010631 dated December 7, 2001, for the construction of First Original Free Will Baptist Church. This permit shall be effective from the date of issuance until December 7, 2011, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in 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, Rick Shiver Water Quality Regional Supervisor RSS/arl: S:1WQSISTORMWATIPERMIT1010631.DEC cc: Brynn Ashton, P.E. Charles Riggs, P.L.S. City of Jacksonville Building Inspections Linda Lewis Wilmington Regional Office Central Files 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 Stormwater Mana-ernent St stems' Permit No. S WS 010631 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 First Original Free Will Baptist Church Onslow County FOR THE construction, operation and maintenance of a wet detention pond 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 December 7, 2011 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 on page 3 of this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 261,945 square feet of impervious area. This pond must be operated with a 30' vegetated filter. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 5. 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 s State StorniNvater Management Systems Permit No. SW8 010631 DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Project Name: First Original Free Will Baptist Church Permit Number: SW8 010631 Location: Onslow County Applicant: Mr. Earl Hanna, Pastor Mailing Address: First Original Free Will Baptist Church 453 College Street Jacksonville, NC 28540 Application Date: November 30, 2001 Name of Receiving Stream/Index 4: White Oak / UT Mill Creek / 19-9 Classification of Water Body: "SC NSW" Pond Depth, feet: 5 Permanent Pool Elevation, FMSL: 24 Drainage Area, acres: 6.49 Total Impervious Surfaces, ft2: 261,945 Offsite Area entering Pond, ftz: None, per Engineer Required Surface Area, ft2: 14,175 Provided Surface Area, ftz: 14,188 Required Storage Volume, ft3: 20,823 Provided Storage Volume, ft3: 21,473 Temporary Storage Elevation, FMSL: 25 A Controlling Orifice: 2"cp pipe N State Stormwater Management Systems Permit No. S W8 010631 II. SCHEDULE OF COMPLIANCE The stormwater management system shall be constructed in it's entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal aid unclogging of outlet structure, orifice device and catch basins and piping. g. Access to the outlet structure must be available at all times. h. The vegetated filter will be kept grassed with no erosion. The spreader mechanism will be kept free of sediment and trash, and must distribute the runoff evenly over the width of the filter. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. Decorative spray fountains will not be allowed in the stormwater treatment system. 6. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 7. Upon completion of construction, prior to issuance of Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in -accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. 8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 9. A modification must be permitted priorto any construction. The following items will require a modification to the permit. The Director may determine that other revisions to the project should require a modification to the permit: a. Any revision to the approved plans, regardless of size. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area. e. Further subdivision, acquisition, or sale of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. if the proposed BUA exceeds the pemitted amount, a modification to the permit must be submitted and approved prior to construction. 4 State Stormwater Management Systems Permit No. SIA'S 010631 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. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. 13. Prior to the sale of any portion of the property, an access/maintenance easement to the stormwater facilities shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale of any portion of the property. 14. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon area. 15. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable. In the event there is a desire for the facilities to change ownership; or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. Responsibility for compliance with all permit conditions remains with the Permittee until such time as the Division approves the formal permit request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143'-215.6C. 3: The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other,government agencies (local, state, and federal) which have jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Permit issued this the 7`h day of December, 2001. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION h Gregory J. Thorpe, Ph:D., Acting Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 010631 5 State Stormwater Management Systems` Permit No. SWS 010631 First Original Free Will Baptist Church Stormwater Permit No. SWS 010631 Onslow County Designer's Certification 1, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, 1 ect) 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 4 State Stormwater )\Management Systems Permit No, SWS 010631 Certification Requirements: I . 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. 1 l . 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 City of Jacksonville Building Inspections 7 `" OFFICE USE ONLY C,, Date Received Fee Paid Permit Number State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopier) for use as an original I. GENERAL INFORMATION I. Applicants name (specify the name of the corporation, individual, etc. who owns the project): F (r t+ Cri i a1_...rr l� F3ar�-E i 5-� Cat jrcb, 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): 3. Mailing Address for person listed in item 2 above: City:_+'50 State: zip: Telephone Number: q \ O — c� 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): F�0 r i bA 1 Fre.� Uy (.3 � . Ch _� rck 5. Location of Project (street address): I Q- qaI--Gu_ra!�8b Ck B�--)a d_ City: �1\L1 ; e _ County: Or 0w[ G. Directions to project (frorn nearest major intersection): rM 7. Latitude: 4i' Y 4� f Longitude: C of project 8. Contact person who can answer questions about the project: Name: lr���gi(QvCR Telephone Number: (Gi O i �d : cdwanj R cc el II. PERMIT INFORMATION: L Specify whether project is (check one): New Renewal Modification Form SWU-101 Version 3.99 Page I of 2. if this application is being submitted % as the result of a renewal or modification to an existing permit, list the existing permit number 1- a _ and its issue date (if known) 3. Specify the type of project (check one): Low Density High Density Redevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): TCAMA 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. IIt. PROJECT INFORMATION 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 . 2. Stormwater runoff from this project drains to the Ne()P t W S _��iver basin. 3. Total Project Area: rl • Q acres 5. How many drainage areas does the project have?. ' 4. Project Built Upon Area: % 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. Bann lnforrriatJon " <"Drainage Area 1 °' f + Drainage Area 2 Receiving Stream Name ["r 1 b7+ar M 1 t 1 CrCC Receiving Stream Class L` ta5 J jC 5W Drainage Area Z314 IZE2543 Existing Impervious" Area Proposed Impervious*AreaO 9 5 % Impervious* Area (total) �J ImperviousSurface Aiea .., ,. -.� Drainage Areal :. . Drainage Area 2 ^ On -site Buildings 85 o8 t On -site Streets On -site Parking t T� On -site Sidewalks Other on -site Off -site Total: 2(0} Total: * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form 5WU-101 Version 399 Page 2 of 4 7. How was the off site impervious area listed above derived? n la IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS f1 ! 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. L 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 he 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 lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 Innovative Best Management. Practice Supplement Form SWU-l01 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. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials • Original and one copy of the Stormwater Management Permit Application Form 197X • 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): 12)tu rN--N T. At 0_, Mailing Address:_ t� _ A±efX -D� 1 ye_ City: 5W aYl�bhr0 __ State: N G Zip: a, Phone: sD 5_5_ 5 Fax: VIM APPLICANT'S CERTIFICATION I, (print or type name ofperson listed in General Information, item 2) F—ar , H arV-N 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: Form SWU-101 Version 3.99 Page 4 of 4 Date: 4' ` — t / l~ + Permit No. �/o� Flo be provided by vWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANACEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may he photocopied for. use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. 1. PROJECT INFORMAT] 0N Project Name: Fi r-5A Dr (gi r \a l �Er-_P-s�.� Contact Person: �- or cP�ho e Number: R 1 "�J !-or projects with m Apr asrns, spei arch asin t pis otor sheet applie(.9 elevations Basin Bottom Elevation 1 q ft. (floor of the basin) Permanent Pool Elevation __�� ft. (elevation of the orifice) Temporary Pool Elevation 5 ft. (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 14 �,�0_�_._ sq. ft. {water surface area at the orifice elevation) Drainage Area ; 2B 2 5 ac. (on -site and qff-site drainage to the basin) Impervious Area q ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume �('y C� c� cu. fl. (combined volume gfmain basin and fiorebay) Temporary Pool Volume 21 47 3 , cu. 1. (volume detained above the permanent poof) Forebay Volume _ G �� �_ cu. ft. (approximately 20% of total volume) Other parameters SA/DA 1 .05 _ (surface area to drainage area ratio from DWQ table) Diameter of Orifice in. (2 to S day temporary pool draw -down required) �t%iti,�,urryt �i�t�CyTa Design Rainfall k • 0 in. � Design TSS Removal z % (minimum 85% required) '•�S$ j .°L��''.r _' a2 SEAL { M i i 4011 (z) +r Form SWt1-f 02 Rev 3.99 Page ! of 4 �%yAI' •;�yfsfi��� _� CJ { M Footnotes: t When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employcd to determine the correct value for non- standard table entries. Z In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90%'1'SS rernoval.' I'he NCDENR BMP manual provides design tables for both 85%'FSS removal and 90%'I'SS removal. II.- REQUIRED ITEMSCHECKLIST 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 (lie space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Pen -nit Application form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initials eTiN _ a. e1A b. _ C. _- d. BTA The permanent pool depth is between 3 and 6 feet (required minitnum of 3 feet). The forebay volume is approximately equal to 20% of the basin volume. The ternporary pool controls runoff from the design storm event. The temporary pool draws down in 2 to 5 days. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) The basin length to width ratio is greater than 3.1. The basin side slopes above the permanent pool are no steeper than 3:1. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). Vegetative cover above the permanent pool elevation is specified. A trash rack or similar device is provided for both the overflow and orifice. A recorded drainage easement is provided for each basin including access to nearest right- of-way. 1. if the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin. in. A mechanism is specified which will drain the basin for maintenance or an emergency. III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one) 0 floes 0 does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay. form SW U-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly; a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clew• the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 clays as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool dephth reads J feet in the main pond, the sediment shall be removed. 3,'75 When the permanent pool depth readsfeet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) V Permanent Pool Elevation 2 O Sediment Iten oval ELM 45ir\ � �� ------ _ ----Sedirnenl Removal -Elevation ,^---I3otlom Etc ation ----- ---- ----- Bottom Elevation FORE BAY MAIN POND 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These plants shall be encouraged to grow along the vegetated shelf and forebay berm. G. if the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. Form S W U-102 Rev 3.99 Page 3 of 4 R• 7. All components of the wet detention basin system shall be maintained in good working order. 1 acknowledge and agree by my signature below that [ am responsible for the performance of the seven maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any changes to the systernn or responsible party. Print name: 'ar[7`%1%/y%� Title: Phone signat Date:��r 1 d Note: The legally responsible party should not be a homeowners association unless more than 5o%ortlie lots have been sold and a resident of the subdivision leas been named the president. I a Notary Public for the State of /t/e-- do hereby certify that Cie- i4^-A V ally a6eared before me this �!Q day o(' /mar/ , �, and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, "^r. I ,tvflL r s: - My commission expires "/'e Form 3WU-lot Rev 3.99 Page of