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HomeMy WebLinkAboutSW8970241_CURRENT PERMIT_20040506STaRMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE � CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD WAT Michael F. Easley, Governor O� r pG William G. Ross Jr., Secretary 0�1 North Carolina Department of Environment and Natural Resources > Alan W. Klimek, P.E.,Director O C Division of Water Quality Coleen H. Sullins, Deputy Director Division of Water Quality May 6, 2004 Mr, John McLean Cape Emerald Properties, LLC Brother and Sisters, LLC 403 Sound View Court Cape Carteret, NC 28584 Subject: Permit No. SW8 970241Moditica6on The Boardwalk RV Park High Density SubdiNision Stormwater Project Carteret County Dear Mr. McLean: The Wilmington Regional Office received a complete Stormwater Management Permit Application for The Boardwalk RV Park on May 5, 2004. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 13A NCAC 2H.1000. We are forwarding Permit No. SW8 970241 Modification, dated May 6, 2004, for the construction of the project, The Boardwalk RV Park. This permit shall be effective from the date of issuance until May 6, 2014, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations -contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days follo%%ing 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 Laurie Munn, or me at (910) 395-3900. Sincerely, Rick Shiver Water Quality Regional Supervisor RSS/:Ism SAWQSISTORttiIWAT\PERMM97024Lmay04 cc: Carteret County Inspections Division of Coastal Management Laurie Munn Wilmington Regional Off -ice Central Files N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax Customer Service 1 800 623-7748 AWNW n+s..'I}ERK State Stormwater Management Systems Permit No. SW8 970241 Modification STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STOILhIWATER 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 Cape Emerald Properties, LLC and Brother and Sisters, LLC The Boardwalk RV Park Carteret County FOR THE construction, operation and maintenance of 1 infiltration basin and 3 infiltration trenches 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 May 6, 2014 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 subdivision is permitted for 199 lots with Lots 1-184 allowed 500 square feet of built -upon area and Lots 185-199 allowed 728 square feet of built -upon area. Approved plans and specifications for this project are incorporated by reference and are 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. State Stormwater Management Systems Permit No. SW8 970241 Modification DIVISION OF WATER QUALITY PROJECT DATA SHEET Project Name: The Boardwalk RV Park Permit Number: SW8 970241 Modification Location: Carteret County Applicant: yir. John McLean Mailing Address: Cape Emerald Properties, LLC Brother and Sisters, LLC 403 Sound View Court Cape Carteret, NC 28584 Application Date: May 5, 2004 Receiving Stream / River Basin: Atlantic Ocean (Trenches) I Bogue Sound (Basin) Stream Index Number: 20-36-(0.5) 99-4 BASIN TRENCH #1 Classification of Water Body: "SA ORW" "SB" Design Storm: 1.5 1.5 Drainage Area, acres: 5.82 0.75 Onsite: 253,519 32,725 Offsite: none none Total Impervious Surfaces, ft2: 157,284 21,655 Trench Dimensions, LxWxH/Pipe Dia.: 100' x 8' x CAT' Required Storage Volume, ft3: *43,493 1,805 Provided Storage Volume, f13: 47,844 2,674 Bottom Elevation, FMSL: 10.5 12 Temporary Storage EIevation, FMSL: 13.5 18 Type of Soil: Sand Time to Drawdown, hours: 19 22 Seasonal High Water Table, FMSL: 8.33 8.33 *The system is sized to contain and infiltrate the 25 year, 24 hour storm. Therefore, no vegetative filter is required. 1 J State Stormwater Management Systems Permit No. SW8 970241 Modification Project Name: Permit Number: Location: Applicant: Mailing Address: DIVISION OF WATER QUALITY PROJECT DATA SHEET ' The Boardwalk RV Park SW8 970241 Modification Carteret County Application Date: Receiving Stream / River Basin Stream Index Number: Classification of Water Body: Design Storm: Drainage Area, acres: Onsite: Offsite: Total Impervious Surfaces, ftz: Trench Dimensions, LxWxH/Pipe Dia.: Required Storage Volume, ft3: Provided Storage Volume, ft3: Bottom Elevation, FMSL: Temporary Storage Elevation, FMSL: Type of Soil: Time to Drawdown, hours: Seasonal High Water Table, FMSL: Mr. John McLean Cape Emerald Properties, LLC Brother and Sisters, LLC 403 Sound View Court Cape Carteret, NC 28584 May 5, 2004 Atlantic Ocean (Trenches) / Bogue Sound (Basin) 99-4 99-4 TRENCH 92 TRENCH #3 "SB" "SB" 1.5" 2" 0.65 0.64 28,154 28,000 13,730 13,139 65' x 8' x 6'/48" 60' x 10' x 6'/48" 1,144 2,189 1,738 2,345 12 11.5 19 18.7 Sand 22 24.3 8.33 8.33 4 State Stormwater Mana¢ement Systems Permit No. SW8 970241 Modification II. SCHEDULE OF COMPLIANCE I . No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature (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. 2. The permittee is responsible for verifying that the proposed built -upon area for the entire lot, including driveways and sidewalks, does not exceed the allowable built -upon area. Once the lot transfer is complete, the built -upon area may not be revised without approval from the Division of Water Quality, and responsibility for meeting the built -upon area limit is transferred to the individual property owner. 3. If an Architectural Review Committee (ARC) is required to review plans for compliance with the BUA limit, the plans reviewed must include all proposed built -upon area. Any approvals given by the ARC do not relieve the homeowner of the responsibility to maintain compliance with the permitted BUA limit. 4. 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 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. 5. The Director may determine that other revisions to the project should require a modification to the permit. 6. 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. The stormwater management system shall be constructed in its entirey, vegetated and operational for its intended use prior to the construction of any built -upon surface. S. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 9. 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. 10. 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. State Stormwater Management Systems Permit No. SW8 970241 Modification 11. Permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 12. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater system function 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 structures, orifice, catch basins and piping. g. Access to all components of the system must be available at all times. 13. 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. 14. Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon area per lot to the amount as shown on the Project Data Sheet, per Section I, Part 2. The recorded statements must follow the form: a. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW8 970241 Modification, as issued by the Division of Water Quality under NCAC 2H.1000. b. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the Stormwater Management Permit. These covenants are to run with the land and be binding on all persons and parties claiming under them. d. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water Quality. e. Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division of Water Quality. f. The maximum built -upon area per lot is 500 square feet for Lots 1 — 184 and 728 square feet for Lots 185 - 199. This allotted amount includes any built -upon area constructed within the lot property boundaries, and that portion of the right -of --way between the front lot line and the edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. g. Lots within CAMA's Area of Environmental Concern may be subject to a reduction in their allowable built -upon area due to CAMA regulations. h. All runoff on the lot must drain into the permitted system. This may be accomplished through providing roof drain gutters which drain to the street, grading the lot to drain toward the street, or grading perimeter swales and directing them into the pond or street. Lots that naturally drain into the system are not required to provide these measures. R State Stormwater Management Systems Permit No. SW8 970241 Modification 15. Prior to transfer of the permit, the stormwater facilities must be inspected by DWQ personnel, and determined to be in compliance with all permit conditions. Any items not in compliance must be repaired or replaced to design condition prior to the transfer. Records of maintenance activities performed to date will be required. 16. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of recording the plat, and prior to selling lots. The recorded copy must bear the signature of the Permittee, the deed book number and page, and stamp/signature of the Register of Deeds. 17. 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. 18. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick,. stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. 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 "Name/Ownership Change Form" must be submitted to the Division of Water Quality accompanied by appropriate documentation from the parties involved, including as may be required, but not limited to, a deed of trust, recorded deed restrictions, Designer's Certification and a signed Operation and Maintenance plan. The project must be in good standing with DWQ. The approval of this request will be considered on its merits and may or may not be approved. 2. The permittee is responsible for compliance with the terms and conditions of this permit until such time as the Director approves the transfer request. 3. 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. 4. 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. 5. 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. 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. Permittee grants permission to staff of the DWQ to access the property for the purposes of inspecting the stormwater facilities during normal business hours. S. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. State Stormwater Management Systems Permit No. SW$ 970241 Modification 1 9. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. Permit issued this the 6th day of May 2004. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Alan W. Klimek, P.E., irector Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 970241 Modification State Stormwater Management Systems Permit No. SW8 970241 Modification The Boardwalk RV Park Page 1 of 2 Stormwater Permit No. SW8 970241 Modification Carteret County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form are a part of this Certification. Noted deviations from approved plans and specifications: Signature Registration Number Date SEAL 9 State Stormwater Management Systems Permit No. SW8 970241 Modification Certification Requirements: Page 2 of 2 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 outletibypass structure elevations are per the approved plan. S. The outlet structure is located per the approved plans. 6. Trash rack is provided on the outletibypass 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, a forebay, and the vegetated filter. 14. The dimensions of the system, as shown on the approved plan, are provided. cc: NCDENR-DWQ Regional Office Carteret County Building Inspections a OFFICE USE ONLY Date Received Fee Paid Permit Number 3 o tl L{ 14, I oa t 5w 7oa N! State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This fom) may be photocopied for use as an original I. GENERAL INFORMATION I. Applicants name (specify the name of the corporation, individual, etc. who owns the project.): 65K4T0E7r_ AA(0 LLCM " 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): JN44 MCI F6,Q _ MAfJW--F_V_ r'AP- EMEZALn AMPEKTIES. L A6r=NT tbi- e?=T4er_ .r mb S 5TepS , LC. 3. Mailing Address for person listed in item 2 above: 403 SouwD 111.-vv CAURT City: eAFE: CARTE EX State:M r- Zip: Z gjSa4 Telephone Number: ( 2CO Z ) 39 3 - ZZ ( q-- 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): PLpPOsED "PS - TR � 60d.�ZDA&A V fin 5. Location of Project (street address): (o 1 IS LA N DEP-- DRIVE City:F_KF,,.9&Lr.) 151 . F;' _ County: c4n,, &T 6. Directions to project (from nearest major intersection): Mnm M C Z 4 / N [ S 8 W TEes i___CTZat i PROCEED 60UTA oN MG SS, DRkyr= 2. Z MiLhs , rulzn! sauT� oN ISLANMR DRIVE _- _ RZWEC-T tS M3 mILS_- OCEAN . 7. Latitude:_ 3_�_ STi S, _ Longitude:_ • 0537 ,_ of project 8. Contact person who can answer questions about the project: Name:' r, OtJ C Telephone Number: cf5z393-*ZZ19 II. PERMIT INFORMATION: 1. Specify whether project is (check one): New Renewal Modification Form SWU-l01 Version 3.99 Page l 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 5 �7 4 and its issue date (if known)j! A 4. 1 q9 8 3. Specify the type of project (check one): Low Density t/ High Density Redevelop General Permit 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 . E XTIA.69ED eASGE� 2. Stormwater runoff from this project drains to the Y- 91TE: OAK River basin. 3. Total Project Area: 0.7*3 acres 4. Project Built Upon Area: 4.9 5. How many drainage areas does the project have?_�� +- 3 Arr� V— D W8 97a4l 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. � P06 CC)�c s-r,rr� Basin Information Receiving Stream Name Receiving Stream Class Drainage Area 3 z z Existing Impervious* Area 5 Z i 5 Proposed Impervious*Area 15, q40S % Impervious` Area (total) c o G t ° Impervious' Surface Area -� On -site Buildings _ 0 IG(4 On -site Streets (4 7 Q S On -site Parking 4- -SE ZOO 5 On -site Sidewalks Other on -site & Z S S Off -site } Total: 13,139 S Total: 9 0 S Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. i Form SWU-101 Version 3.99 Page 2 of 5� lb 4- }L1L 1 05/05/2004 15:04 252-393-2463 W.B. MC LEAN PAGE 02/02 5W6 970 z41 -E 6TING, C--pSTING W R LTF,&T.O �3 BA51 h E Y_-) Basin Inlormadon T ENG vF C� AO Receiving Stream Name Receiving Stream Class Drainage Area �$ C,a�L 5 ' .$Z .AC Existing Impervious' Area �j, (p7 Atc@ras Proposed Impervious�Area S • �D'I AC>2E % Impervious- Area (total) Impervious- Surface Area '{� DEf`AOLI On -site BuildingsOn-si(e Streets S Z 7 On site Parking On -size Sidewalks Z� d}DO S o ,o ether on•site Off -site Total' 3 3 %3 5 Total: 5q 045 •� • Impervious area is defined as the bLdlc upon area including. bur nor lirnfred to, buildi; p. roads. parkln� areas. sidewalks, gravel areas, etc. ED) L oTs Nc1MOEIZ! a f 'v' gbd6d /8 4- AR F 4a'% ' 500 La-rs AVt1Mf -9&D /85 �a cicu 1 q 9 tN Fl066--6960 Fog 7Z8 sFIz-or: �cv • Sf5�4 7. How was the off -site impervious area listed above derived?. IV, DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. 1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State, 2. No more than --- square feet of any lot shall be covered by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decking or the water surface of swimming pools. IVIA - PRO PECT� is Alan SE (Mdi 40 "E CO 3. Swa es shall not be filled in, piped, 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-101 Version 3.99 Page 3 of 4 .Vl. 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 J PM • One copy of the applicable Supplement Form(s) for each BMP J PM • Permit application processing fee of �42C(payable to NCDENR} Zlo 60 JPM • Detailed narrative description of stormwater treatment/management J PM • Two copies of plans and specifications, including: - Development/Project name -Engineer and firm r -Legend - North arrow r - Scale - Revision number & date - Mean high water line W f A - 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 r - Drainage areas delineated ✓ - Vegetated buffers (where required) A//A 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): JoA6_MC LEAtJ ._ Mailing Address: "3. �OUt.3p V tP—W C4ur'f City: i�Q e Cq,CState: AfC zip: Zg S$¢ Phone: { Z 22 19 tax:( Z Z ) 3 �13 - 7-4 / 3 VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) �0 N Ai 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, r� Form SWU-101 Version 3.99 Page 4 of 4 Date: 5 —4 5 - Z4a 4 Permit No. 5W6 } G Z 4 ( AltW (to he provide d by D IVO State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form t)ay be photocopied for use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name : 170E ftAK DINALK RV PARY EM7AQs1oN Contact Person: c„)n"N_ MG L—EQN. Phone Number; EXISTING ln4V71LT1ZA-UC) J This workshect applies to: Basin No. in Drainage Area (as idenfilied on plans) (from Form SIVU-101) II. DESIGN INFORMATION -Attach supporting calculations/documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Infiltration Rate SHWT Elevation Basin Design Parameters Design Storm Design Volume Drawdown Time Basin Dimensions Basin Size Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation N EW 1- Ate 1 .db -� �n/hrr of/hr/sf (circle appropriale units) 46, 3 fmSI (Seasonal High Wafer Table elevation) 8 inch (1.5 inch event for SA raters, I inch even! for others) 7 z c.f. .7 days 100 ft. x 17O 7 c.f. c). J fmsl 4— fllsl furs I Form S WU- l 03 Rev 3.99 Pace l of 3 ft. = _ 17, 000 sq. ft. (bottom dimensions) EXISTING, gASf�( 5w8 970241 11f. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stortnwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stoumwater Management Pcnnit Application Form, the agent may initial below. Attach justification if a requirement has not been inet. Applicants Initials a. Systern is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. --� c. Bottom of system is at least 2 feet above the seasonal high water table. J PM d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. c. System is not sited on or in fill material or DWQ approval has been obtained. J r M f. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. -J PM g. Drainage area for the device is less than 5 acres. lla RM h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is 0-1 attached. NQT OTrl1C{-�(] F>t I i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. N O JPM j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. YE—s J P k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). P 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. NO JPM m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. �f'-5 n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum r length is 50 feet for SA waters, 30 feet for other waters). �1 o. Flow distribution mechanism within the basin is provided. Y-E-5 P,, p. A benchmark is provided to determine the sediment accumulation in the pretreatment evice. -.i P AA q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). .� e V t r. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. nd a ea Z d,a s. Plans ensure that the installed system will meet design specific tions (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. Form SwU-l03 Rev 3.99 Page 2 of 3 n y 41 ' 7• I I\'.' INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow ve-etated cover to maintain a maximum height of six Inches, and remove trash as needed. zn 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4_ Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate Manner and shall not be handled in a manner that will adversely impact water quality (i.e, stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can betaken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads+ I I -0 feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. If the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for the performance of the five maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible parry. Print Nai Address: Phone: Signature: 2 F Z- 5CB - 2 Z 19-- Date: 5— a S- Z.GIo 4 W- ZZ 58 Note: The le all erpnnsihle pnrly should not he a homeowners association unless more than 50% of the lots have been sold and a rresid nr 0j re suhdrvisrn/++hers been ncrnred 11+e president. a Notary Public for the State of / Qf C A County of ,061.4 .�_ do hereby certif -_'T42 . 'v/ �G� � _ personally appeared before me this S� day of zoo , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, SEAL My commission expires A/6t 4101 1 Fonri. SWU-103 kev 3.99 Page 3 of 3 mL Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM UNDERGROUND INFILTRATION TRENCH SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater_Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an underground infiltration trench supplement for each system, design calculations, and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name : `I V 5 Contact Person: IJ6 QN LEAN Phone Number: (?qZ) '59 3 - ZZ_ 19 For projects with multiple infiltration systems, a supplement form must be completed for each system. This worksheetappliesto: Trench in Drainage Area k?CISTfI�1G► # S�jg g70�4r! (from plans) (from Form SWU-101) H. DESIGN INFORMATION (attach supporting calculations/documentation): Soils Report Summary (based upon an actual field investigation and soil borings) Soil Type N Infiltration Rate • $ n/hr r cf/hrlsf (circle appropriate units) SHWT Elevation '� g .?J�J fmsl (Seasonal High Water Table elevation) Trench Design Parameters Design Volume 2301 c.f. Design Storm inch event (1.5 inch eventfor SA waters, 1 inch eventfor others) Drawdown Time • % days Perforated Pipe Size inch diameter Perforated Pipe Length No. Observation Wells (may be required on a case -by -case basis) Stone Type (if used) 57 fj �j'� jiv P12aJ6r-T' Stone Void Ratio 4"0 ✓ Trench Elevations (in feet mean sea level) � fa Bottom Elevation fmsl Storage/Overflow Elevation '� _� g fmsl Form S WU- l07 Rev 3.99 Page I of 4 N5rNG TKNC� :" 1 Y Trench Dimensions Height Width tO a 8 ft. II1. REQUIRED ITEMS CHECKLIST Length 100 ft. Volume Provided 2 ,?d 1 _ cu.ft. The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met .and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Applicants Initials J F M System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. Off-line system, runoff in excess of the design volume bypasses the system (bypass detail provided). r[lo yPASS Jf. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogeologic evaluation may be required). g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour. h. System is not sited on or in fill material or DWQ approval has been obtained. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Jk. System is located in a recorded drainage easement for the purposes of operation and A�Q maintenance and has recorded access easements to the nearest public right-of-way. r`l PSI System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). m. Drainage area for the device is less than 5 acres. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided. o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches. p. Sides of the infiltration trench are lined with geotextile fabric. q. Rock used is free of fines (washed stone) and has a large void ratio. Side to bottom area ratio is less than 4:1. Form S WU- l07 Rev 3.99 Page 2 of 4 GPM s. Observation well(s) are provided (case -by -case basis). t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and detail is shown on plans. u. A benchmark for checking sediment accumulation is provided. c 14 KrK 5Emi1A4eAJT -ki'y WSPCcn0N1 of -PIPE, IV. UNDERGROUND IN!'FILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for blockage and deterioration and the- infiltration system for erosion, trash accumulation,. grass cover, and general condition. 2. Repair eroded areas immediately, re -seed as -necessary to maintain adequate vegetative, cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system performance. 3. Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore depth to original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. 4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month. Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months) shall be reported to DWQ immediately. 5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H J000 must be designed, approved and constructed. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over - excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e.. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the infiltration system. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the depth at the benchmark reads YIA , the accumulated sediment shall be removed from the system. Form S WU- l07 Rev 3.99 Page 3 of 4 ' I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater collection system in accordance with the six maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title:_ Jbg m Ac LEAM , t"!,M kc EO. Address: 402" SOuoo VtEVJ 6AUP-1- CAPE. CoR15--RE-r ZSS5� Phone: Z C/ Z - 3 �13 - Z Z I ci Date:_ sit _ &404 ► zoo 4- Signature: Note: The legally +p4sible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of th ubdi vision has been nanted the president. 1, i w... ► a Notary Public four the State of - "" &JAJIL,, County of A 9%) do hereby certify at 0 /• 4440personally appeared before me this day of, and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. W mess my hand and fficial seal, . SEAL My commission expires l a "VI OF Form S WU-107 Rev 3.99 Page 4 of 4 §.r .�' ;.. . , t .r Permit No. � p PJQ�,q'(MUO (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM UNDERGROUND INFILTRATION TRENCH SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an underground infiltration trench supplement for each system, design calculations, and plans and specifications showing all stormwater conveyances and system details. 1. PROJECT INFORMATION Project Name: AQV3ALY, V PARK, E x PA Qs l o NS Contact Person: 1:�CLEA N Phone Number: (254) _ 3!9 3 - 7- z 9 For projects with multiple infiltration systems, a supplement form must be completed for each system. This worksheet applies to: Trench �W- 2 in Drainage Area _-A Z E +iS-riN(; 5UJ a 970Z4j (from plans) (from Form SWU--1 p1) II. DESIGN INFORMATION (attach supporting calculations/documentation): Soils Report Summary (based upon an actualfield investigation and soil borings) Soil Type NgW14AN Infiltration Rate 1 • (or cf/hr/sf (circle appropriate units) SHWT Elevation + 9- 3 3 fmsl (Seasonal High Water Table elevation) Trench Design Parameters Design Volume 11-717 cs. Design Storm I t12 inch event (1.5 inch event for SA waters, 1 inch event for others) Drawdown Time 0,9 days Perforated Pipe Size it inch diameter Perforated Pipe Length r ft. No. Observation Wells (may be required on a case -by -case basis) Stone Type (if used) f 5 -7 `-^ 3 for, 1�mTk R E M0 J EZ-T Stone Void Ratio Trench Elevations (in feet mean sea level) Bottom Elevation + I Z fmsl Storage/Overflow Elevation t 19 fmsl Form SWl1-107 Rev 3.99 Page 1 of 4 EXi s-nNG Trench Dimensions II� // Height (D fl. Length i0 S ft. Width U _ ft. Volume Provided �i'7 cu.ft. III. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Applicants Initials .. FM J JPM PM a. System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. Off-line system, runoff in excess of the design volume bypasses the system (bypass detail provided). tS(} 13`rPpSS JPM f. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogeologic evaluation may be required). g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour. h. System is not sited on or in fill material or DWQ approval has been obtained. Plans ensure that the installed system wilt meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. JPMj. System is sized to take into account the runoff at the ultimate built -out potential from all y An surfaces draining to the system, including any off -site drainage. 1�1Y l k. System is located in a recorded drainage easement for the purposes of operation and A � O maintenance and has recorded access easem nts to the nearest public right-of-way. IV OWgER OPG-RATES fZPNRK 4 O4 M 1. System captures and infiltrates the runoff from the first 1.0 inch of rainfall 1.5 i ch event . for areas draining to SA waters ). I III Jm. Drainage area for the device is less than 5 acres. J n. A pretreatment device ( filter strip, grassed Swale, sediment trap, etc.) is provided. NZ J P6 o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches. p. Sides of the infiltration trench are lined with geotextile fabric. YE-5 J PAA q. Rock used is free of fines (washed stone) and has a large void ratio. �� r. Side to bottom area ratio is less than 4:1. Form SWU-lo7 Rev 3.99 Page 2 of 4 ' ' .i Q M s. Observation well(s) are provided (case -by -case basis). 3 a Q N20i oc-Q` �1 Q t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) p and detail is shown on plans. r M u. A benchmark for checking sediment accumulation is provided. M 6 C�EzK SMrMa-mi Z� ExAWNW6 Pf PE- N. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT I. After every runoff producing rainfall event and at least monthly inspect the bypass/overfloiv structure for blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system performance. 3. Remove accumulated sediment annually or when depth is reduced to 75% of the original design depth. Restore depth to original design depth without over -excavating. Over excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. 4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month. Chronic high water table elevations (within I foot of the bottom of the -system for a period of three months) shall be reported to DWQ immediately. 5. if DWQ determines that the system is failing, the system will immediately be repaired or replaced to original design specifications. if the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over - excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the infiltration system. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the depth at the benchmark reads , the accumulated sediment shall be removed from the system. Form SWU-107 Rev 3.99 Page 3 of 4 ` 'I acknowledge and agree by my signature below that I am responsible for maintaining the stormwater collection system in accordance with the six maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Joj,4Q Mc Le0.n Address: kO25 S8Q136y IEAi IfOU A Phone: Signature: 4ckrr Date: 5 AA Zoo 4- Note: The 1�gully 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, ►� ! 4.w - a Notary Public for the State of AW /ft1��, County of /rf•.f /a rJ , do hereby certi that �D% 1' G4ae.._� personally appeared before me thisS day of ZM and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Vitness my hand and official seal, ,tSF.AL My commission expires Form SWU-107 Rev 3.99 Page 4 of 4 Permit No. '50 0 gg0xi bm (to be provided ht, DWQ) State of Norte Carolina Department of Environment and Natural Resources Division of Water Quality STORuIWATER MANAGEMENT PERMIT APPLICATION FORM UNDERGROUND INFILTRATION TRENCH SUPPLEMENT This form may be photocopied for use as an original DWO Storrnwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an underground infiltration trench supplement for each system, design calculations, and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name : TAF, &4fMWALK RV &9K _ E)�PANs1a N Contact Person: 'Aogi C-�-E&N _ Phone Number: 25 Z 3 3 - Z Z For projects with multiple infiltration systems, a supplement form must be completed for each system. This worksheet applies to: Trench in Drainage Area :�- 3 mo PO ✓&l] -T, ENC44 (from plans) (from Form SWU--101) H. DESIGN INFORMATION (attach supporting calculations/documentation): Soils Report Summary (based upon an actual field investigation and soil borings) Soil Type VFW944 Infiltration Rate F1UW15EO u I inJhr or cf/hr/sf (circle appropriate units) SHWT Elevation + $•�J�1 fnsi (Seasonal High Water Table elevation) (&4ei\J Lee,t,itS,LJS) Trench Design Parameters Design Volume 2 a c.f. Design Storm 2 inch event (1, S in nt for SA waters, I inc or others) E,=, Drawdown Time 0. 3 days Perforated Pipe Size 45 inch diameter Perforated Pipe Length ft. No. Observation Wells (mav be required on a case -by -case basis) Stone Type (if used) 57 Stone Void Ratio 0.55 Trench Elevations (in feet mean sea level) Bottom Elevation -F 11.5 fmsl Storage/Overflow Elevation 1$ fmsl Form SWU-l07 Rev 3.99 Page 1 of 4 i R�cN A- 3 Poseo f 4A 1 �rl 0 0 Trench Dimensions Height tD ft. Width _ 0 ft. III. REQUIRED ITEMS CHECKLIST Length Volume Provided 2^, 19 0 cu.ft. The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H ,1008. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. Attach justification if a requirement has not been met. Applicants Initials _1 F V"-4 a. System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. J c. Bottom of system is at least 2 feet above the seasonal high water table. ✓ �) 6A d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. MIA -J PM e. Off-line system, runoff in excess of the design volume bypasses the system (bypass detail N/p provided). ► o (3TR 5 JI?1"i f. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days based upon infiltration through the bottom only (a hydrogeologic evaluation may be required). �e-5 P g. Soils have a minimum hydraulic conductivity of 0.52 inches per hour. (`re,) -J P M h. System is not sited on or in fill material or DWQ approval has been obtained. -� p [ �A i. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. ✓ J PM j. System is sized to take into account the runoff at the ultimate built-out�otential from all surfaces draining to the system, including any off -site drainage. ✓ -.1 P&A k. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded acces a silents to the nearest public ht- IF -way bWNEV b RDT�S t':4R C A%t LO 8 6C IN R 1- s` sm--M M 1. System captures and infiltrates the runoff from the first L0 inch of rainfall (1.5 inch event for areas draining to SA waters ). 7— `t �j P M m. Drainage area for the device is less than 5 acres. Less +ka ^ f acxLf JPNL n. A pretreatment device ( filter strip, grassed swale, sediment trap, etc.) is provided. NO J P M o. Trench bottom is covered with a layer of clean sand to an average depth of 4 inches. Y-S 12 to p. 3 P M q. J PN1 r. Form SWU-107 Rev 3.99 Sides of the infiltration trench are lined with geotextile fabric. �e—s Rock used is free of fines (washed stone) and has a large void ratio. lqr� Side to bottom area ratio is less than 4:1 Page 2 of 4 No — 5E;E- DET'A L- ots 5rr-E: A�Rp7 PMs. Observation wells) are provided (case -by -case basis). 6 C— \f-_ t. Vegetated filter is provided for overflow (50 feet for SA waters, 30 feet for other waters) and detail is shown on plans. -- At,. 51TES ARE \IV M_0 . j Pu. A benchmark for checking sediment accumulation is provided. N A VI'-wQ a I /w, f Ti O r\ 0 IN'. UNDERGROUND INFILTRATION TRENCH OPERATION AND MAINTENANCE AGREEMENT After every runoff producing rainfall event and at least monthly inspect the bypass/overflow structure for blockage and deterioration and the infiltration system for erosion, trash accumulation, grass cover, and general . condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash and blockages as needed to maintain system performance. 3. Remove accumulated sediment annually or when depth is reduced to 75% of the original design. depth. Restore depth to original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. 4. The water level in any monitoring wells will be recorded after a 1 inch rainfall event and at least once a month. Chronic high water table elevations (within 1 foot of the bottom of the system for a period of three months) shall be reported to DWQ immediately. 5. If DWQ determines that the system is failing, the system will immediately be repaired or replaced to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. 6. Remove accumulated sediment from the infiltration system annually or when depth in the unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over - excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e.. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the infiltration system. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. r When the depth at the benchmark reads the accumulated sediment shall be removed � � , from the system. Form SWU-107 Rev 3.99 Page 3 of 4 _10yo f -1 ' I acknowledge and agree by my signature below that 1 am responsible for maintaining the stormwater collection system in accordance with the six maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Address: J. VP i" Leo— r% , l Y L Cc. rL" Phone: 2 _Cl Z — 30 -3L_ ZZ i Signature: e-�- & Pa!+ � L .__ O , t.- L LG Date:_ . wo4- j Note: The legaify�6&5ible 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. t, Aj < ( k , a- � • rc" + r+ 4 a Notary Public for the State of _d`� o �� Au.. county of flwS �L.) , do hereby certify that s O nn r`t y fy � �!'� T� lN� � L e4r� � - personally appeared before me this day of D and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, i My commission expires r". Cpu1ttt�,, Form SWU-107 Rev 3.99 Page 4 of 4 5�3/a