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HomeMy WebLinkAboutSW8031207_CURRENT PERMIT_20040518STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE � CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE �b71�F.pvr�� YYYYMMDD OF WA7-FR Michael F Easley, Governor �a p William G Ross Jr Secretary �O G North Carolina Department of Environment and Natural Resources > Alan W Klimek P E ,Director O Division ofWvater Quality Coleen H Sullins, Deputy Director Division of Water Quality May 18, 2004 Mr Jonathan L Mason, Member/Manager White Oak, LLC, General Partner White Oak Apartments, LP PO Box 10284 Wilmington, NC 28404 Subject: Stormwater Permit No. SW8 031207 White Oak Apartments High Density Project New Hanover County Dear Mr Mason The Wilmington Regional Office received a complete Stormwater Management Permit Application for White Oak Apartments on March 9, 2004 Staff review of the plans and specifications has determined that the protect, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H 1000 We are forwarding Permit No SW8 031207 dated May 18, 2004, for the construction of the subject protect This permit shall be effective from the date of issuance until May 18, 2014, and shall be subject to the conditions and limitations as specified therein Please pay special attention to the Operation and Maintenance requirements in this permit Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit This request must be in the form of a written petition, conforming to Chapter 150E of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P 0 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 IWQSISTORMWATIPERMIT1031207 may04 cc Phil Tripp, P E, Tripp Engineering Tony Roberts, New Hanover County Building Inspections Beth E Wetherill, New Hanover County Engineering Linda Lewis Wilmington Regional Office 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 z�a NERR State Stormwater Management Systems Permit No SW8 031207 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 Jonathan L Mason, White Oak, LLC, White Oak Apartments, LP White Oak Apartments New Hanover County FOR THE construction, operation and maintenance of a non -discharging infiltration basin in compliance with the provisions of 15A NCAC 2H 1000 {hereafter referred to as the "stormwater rulesl 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 18, 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 descnbed in the application and other supporting data 2 This stormwater system has been approved for the management of stormwater runoff as descnbed on page 3 of this permit, the Project Data Sheet The stormwater control has been designed to handle the runoff from 83,195 square feet of impervious area 3 The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans 4 All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans 5 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system A permit modification must be submitted and approved pnor to the construction of additional built -upon area from outside of the approved drainage area Page 2 of 8 f e oLcIL� owfl[Iwalef management Systems Permit No SW8 031207 DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Project Name Permit Number Location Applicant Mailing Address Application Date Receiving Stream/River Basin Stream Index Number Classification of Water Body, Drainage Area, Gres Onsite, ft� i Offsite, ft2 Total Impervious Surfaces, ft2 Basin Depth, feet TSS removal efficiency Bottom Elevation, FMSL Permitted Surface Area, ft2 Permitted Storage Volume, ft3 Temporary Storage Elevation, FMSL Type of Soil Expected Infiltration Rate, inlhr Seasonal High Water Table Elev Time to Draw down, hours White Oak Apartments SW8 031209 New Hanover County Jonathan L Mason, Member/Manager White Oak, LLC, General Partner White Oak Apartments, LP PO Box 10284 Wilmington, NC 28404 March 9, 2004 Pages Creek I Cape Fear CPF24 18-87-1-(1) "SA" 673 293,158 0 83,195 1 75 90% (no filter is required) 29 17,979@Bottom 36,036 3075 Fine -Medium Sand 07 27 0 FMSL 47 Page 3 of 8 State Stormwater Management Systems Permit No SW8 031207 II SCHEDULE OF COMPLIANCE The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface 2 During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately 3 The 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 slopes and the vegetated filter d Immediate repair of eroded areas e Maintenance of all slopes in accordance with approved plans and specifications f Debris removal and unclogging of outlet structure, flow spreader, catch basins and piping g Access to the infiltration basin and outlet structure must be available at all times 4 Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ The records will indicate the date, activity, name of person performing the work and what actions were taken 5 The facilities shall be constructed as shown on the approved plans This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data 6 Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation Any deviations from the approved plans and specifications must be noted on the Certification A modification may be required for those deviations 7 If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility 8 At least 30 days prior to the sale or lease of any portion of the property, the permittee shall notify DWQ and provide the name, mailing address and phone number of the purchaser or leasee An access/maintenance easement to the stormwater facilities shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale or lease of any portion of the property Page 4 of 8 Z[a1e OLQrmwaier management Systems Permit No SW8 031207 9 The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below a Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc b Project name change c Transfer of ownership d Redesign or addition to the approved amount of built -upon area or to the drainage area e Further subdivision, acquisition, 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, altenng, 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 amount permitted under this permit, a modification to the permit must be submitted and approved pnor 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 must maintain compliance with the proposed built -upon area and ensure that the runoff from all the built -upon is directed into the permitted system 13 The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit Within the time frame specified in the notice, the permittee shall submit a wntten time schedule to the Director for modifying the site to meet minimum requirements The permittee shall provide copies of revised plans and certification in wnting to the Director that the changes have been made 14 The permittee must maintain the current permitted drainage area No additional runoff from outside of the permitted drainage area boundary may enter the permitted stormwater facilities without first applying for and receiving a permit modification III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropnate The approval of this request will be considered on its ments and may or may not be approved The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request The dissolution of the limited partnership and/or limited liability company does not preclude the permittee from complying with all permit conditions 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, ,n accordance with North Carolina General Statute 143-215 6A to 143-215 6C Page 5 of 8 State Stormwater Management Systems Permit No SW8 031207 3 The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction 4 In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems 5 The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility 6 The permit may be modified, revoked and reissued or terminated for cause The fling of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition 7 Unless specified elsewhere, ppermanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual 8 Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit 9 The permittee shall notify the Division any name, ownership or mailing address changes within 30 days Permit issued this the 1 8th day of May, 2004 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Alan W Klimek, P E, Director Division of Water Quality By Authority of the Environmental Management Commission Page 6 of 8 VUd1I I IVV QIcI IV I4211O 01I ICI IL Jyb LIZII IS Permit No SW8 031207 White Oak Apartments Stormwater Permit No SW8 031207 New Hanover 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 protect, (Protect) for (Protect Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the protect construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications The checklist of items on page 2 of this form is included in the Certification Noted deviations from approved plans and specification Signature Registration Number Date SEAL Page 7of8 State Stormwater Management Systems Permit No SW8 031207 Certification Requirements 1 The drainage area to the system contains approximately the permuted acreage 2 The drainage area to the system contains no more than the permitted amount of built -upon area 3 All the built -upon area associated with the project is graded such that the runoff drains to the system 4 All roof drains are located such that the runoff is directed into the system 5 The outlet/bypass structure elevations are per the approved plan __.. 6 The outlet structure is located per the approved plans 7 Trash rack is provided on the outlet/bypass structure 8 All slopes are grassed with permanent vegetation 9 Vegetated slopes are no steeper than 3 1 10 The inlets are located per the approved plans and do not cause short- circuiting of the system 11 The permitted amounts of surface area and/or volume have been provided 12 Required drawdown devices are correctly sized per the approved plans 13 All required design depths are provided 14 All required parts of the system are provided, such as a vegetated shelf, and a forebay 15 The required system dimensions are provided per the approved plans cc NCDENR-DWQ Regional Office Tony Roberts, New Hanover County Building Inspections Page 8 of 8 9P¢�eEg af�Ee i8 P F f �d �g �3 € j ia} i 3 i gegiPisDate Received Fee Paid Permit Number al —2 —6 3 63 /.)-.-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) White Oak Apartments, LP 2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance) -Jen Mason Member Manager, White Oak LLC General Partner -16n _- %h 2-11 3 Mailing Address for person listed in item 2 above P O Box 10284 City Wilmin on State NC Zip 28404 Telephone Number 686-4048 4 Project Name (subdivision, facility, or establishment name — should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc ) White Oak Apartments 5 Location of Project (street address) 225 Middle Sound Loop Road City Wilmin on County New Hanover _ 6 Directions to project (from nearest major intersection) Approx 700 If north of the intersection of Middle Sound Loop Road and Darden Road 7 Latitude N 340 16' 30" Longitude W 770 48' 00" of project 8 Contact person who can answer questions about the project Name Phillip TrippTelephone Number 910-763-5100 II PERMIT INFORMATION 1 Specify whether project is (check one) X New Form SWU-101 Version 3 99 Page I of Renewal Modification 2 If this application is being submitted as the result of a renewal or modification to an existing permit, list The existing permit number and its issue date (if known) 3 Specify the type of project (check one) Low Density X High Density Redevelop General Permit Other 4 Additional Project Requirements (check applicable blanks) CAMA Major X Sedimentation/Erosion Control 404//401 Permit NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748 III PROJECT INFORMATION I In the space provided below, summarize how stormwater will be treated Also attach a detailed narrative (one to two pages) describing stormwater management for the project stormwater will be treated through an infiltration basin 2 Stormwater runoff from this project drams to the Cape Fear River basin 3 Total Project Area 6 73 acres 5 How many drainage basins does the project have9 1 4 Project Built Upon Area 284 % 6 Complete the following information for each drainage area If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below Basin,Inforn""ahon ; � �'', , ;` � s� �� 1i ` �� g a ° Dra�na a Basin l �' � , F ;L �DramagegBasih 2 a Receiving Stream Name Trib to Pages Creek Receiving Stream Class SA Drainage Basin Area 6 73 ac Existing Impervious * Area - Proposed Impervious * Area 1 92 sc % Impervious* Area (total) 28 4% qa Itl� F a;hnpeyrvl us�9iiP" Suu�rfaG,eI,'A�rea'� ml$wj I1 d7gtQ6nc[w�xtN {?t s h tt F sit , tBE zeeEi On -site Buildings 28,300 sf On -site Streets On -site Parking 43,320 sf On -site Sidewalks 11,575 sf Other on -site Off -site Total E=83,195 sf E= * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas sidewalks, gravel areas, etc Form SWU-101 Version 3 99 Page 2 of r 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 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 arty lot shall be covered by structures of 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 swimmingpools 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 managementpermit modification prior to construction 5 All permitted runofffrom 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 bmdmg 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 (910) 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 VI SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ) A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office 1 Please indicate that you have provided the following required information by initialing in the space provided next to each item Applicant's Initials • Original and one copy of the Stormwater Management Permit Application Form , • One copy of the applicable Supplement Form(s) for each BMP Z • Permit application processing fee of $420 (payable to NCDENR) • Detailed narrative description of stormwater treatment/management L�- • Two copies of plans and specifications, including - Development/Project name - Engineer and firm - Legend - North arrow - Scale - Revision number and 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) Tri En meenn P C Mailing Address 419 Chestnut Street City Wilmin on State NC Zip 28401 Phone 910 763-5100 Fax �(910) 763-5631 VIII APPLICANT'S CERTIFICATION �JUn 2 2YI L. 1, (print or type name ofperson listed in General Information, item 2) .14an Mason , 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 �` GG�i��:�� Date Form SWU-101 Version 3 99 Page 4 of Permit No S60 F 0 31 ZO-7- (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopted for use as an original DWQ Stormwater Management Plan Review A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details 1. PROJECT INFORMATION Project Name White Oak Apartments Contact Person Phillip TrippPhone Number 910 763-5100 This worksheet applies to Basin No 1 in Drainage Area 1 (as identified on plans) (from Form SWU-101) II. DESIGN INFORMATION — Attach supporting calculations/documentation The soils report must be based upon an actual field investigation and soil borings County soil maps are not an acceptable source of soils information All elevations shall be in feet mean sea level (fmsl) Soils Report Summary Soil Type Fine to Medium Sand Infiltration Rate 07 inter r cf/hr/sf (circle appropriate units) SHWT Elevation 270 fmsl (Seasonal High Water Table elevation) Basin Design Parameters Design Storm 1 5 inch (1 5 inch event for SA waters, 1 inch event for others) Design Volume 11,397 c f Drawdown Time 1 96 days Basin Dimensions Basin Size 36 ft x 4994 ft = 17,979 sq ft (bottom dimensions) Basin Volume Provided 36,036 c f Basin Elevations Bottom Elevation 290 fmsl Storage Elevation 3075 fmsl Top Elevation 31 5 fmsl Form SWU-103 Rev 3 99 Page I of 3 III. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N C Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section 15 A NCAC 2H 1008 Initial in the space provided to indicate 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 CSC- a System is located 50 feet from class SA waters and 30 feet from other surface waters Cot, b System is located at least 100 feet from water supply wells CQ c Bottom of system is at least 2 feet above the seasonal high water table COX. d Bottom of system is 3 feet above any bedrock or impervious soil horizon Co e System is not sited on or in fill material or DWQ approval has been obtained Cp, _ 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 _ - g Drainage area for the device is less than 5 acres CQ_, h Soils have a minimum hydraulic conductivity of 0 52 inches per hour and soils report is attached CX�r, i System captures and infiltrates the runoff from the first 10 inch of rainfall (1 5 inch event for areas draining to SA waters) Design volume and infiltration calculations attached 4:::m 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 k All side slopes stabilized with vegetated cover are no steeper than 3 1(H V) 2 1 & sodded nk I A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment Iran is provided _Cae_ in 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 f4A n Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters) �L o Flow distribution mechanism within basin is provided CQ_ p A benchmark is provided to determine the sediment accumulation in the pretreatment device C�+L q Runoff in excess of design volume bypasses off-line systems (bypass detail provided) r System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days A soils report and all pertinent draw -down calculations are attached C s Plans ensure that the installed system sill meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized Form SWU-103 Rev 3 99 Page 2 of 3 IV JNFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1 After every runoff producing rainfall event and at least monthly, inspect 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 as needed 3 After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration Remove any blockage and repair the structure to approved design specifications 4 Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth The system shall be restored to the original design depth without over -excavating Over excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner That will adversely impact water quality (i a stockpiling near a stormwater treatment device or stream, etc ) A benchmark shall be established in the pretreatment unit The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments When the design depth reads 0.75 feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5 If the Division determines that the system is failing, the system will immediately be repaired to original design specifications If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H 1000 must be designed, approved and constructed I acknowledge and agree by my signature below that I am responsible for the performance of the five maintenance procedures listed above I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party J�n 24011 L Print Name and Title 4em Mason, Member Manager Address P O Box 10284 Wilmington, NC 28404-0284 Phone Signature Date 10 - !I--<73 Note: Th lly responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president 1, ]—>c a. C .�, _, a Notary Public for the State of North Carolina, County of $llder do hereby certify that Jon Mason _ personally appeared before me thisZL day of _C�6}c6��, 2003 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements Witness my hand and official seal, SEAL Form SWU-103 NOTAgy a' UBuc cJ,,. Rev3 t !!llflltl111411` My commission expires 10- js - a g Page 3 of 3