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HomeMy WebLinkAboutSW8070568_HISTORICAL FILE_20080125STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO SW8 Q105� 8 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2 0 oc3 o 12 5 YYYYMMDD OV „�rgQG i I �ULLJL.JI r Michael h Easlev, Go%tmor William G Ross Jr Secretary North Carolina Department of E N iron ment and Natural Resources jl`'.'_ — —` January 25, 2008 Hugh Batts, President Jones-Onslow EMC 259 Western Boulevard Jacksonville, NC 28546 Subject Stormwater Permit No SW8 070568 Jones-Onslow EMC Sneads Ferry District Office High Density Commercial Project Onslow County Dear Mr Batts Coleen H Sullins Dnector Division of Water Quality The Wilmington Regional Office received a complete Stormwater Management Permit Application for Jones-Onslow EMC Sneads Ferry District Office on December 3, 2007 Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H 1000 We are forwarding Permit No SW8 070568, dated January 25, 2008, for the construction of the subject project This permit shall be effective from the date of issuance until January 25, 2018, and shall be subject to the conditions and limitations as specified therein Please pay special attention to the Operation and Maintenance requirements in this permit Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within sixty (60) days following receipt of this permit This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of _Administrative Hearings, -P O -Drawer 27447,-Raleigh-, NC 27611-7447 Unless such demands are made this permit shall be final and binding If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at (910) 796-7215 Sin rely, �P.4/L Wward Beck Regional Supervisor Surface Water Protection Section ENB/arl S \WQS\STORMWATER\PERMIT\070568 jan08 cc David Newsom, P E , Crystal Coast Engineering Onslow County Inspections Linda Lewis Wilmington Regional Office Central Files No ihCarohna ,Naturally Ninth Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796 7215 Customer Service Wilmington Regional Office Internet www ncwaterqual tv ore Fax (910) 350 2004 1 877 623 6748 An Equal OpportumtylAffrmative Action Employer— 50% Recycled/10% Post Consumer Paper State Stormwater Management Systems Permit No SW8 070568 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 Hugh Batts and Jones-Onslow EMC Sneads Ferry Distnct Office 1225 NC Highway 210, Sneads Ferry, Onslow County FOR THE construction, operation and maintenance of one (1) infiltration basin in compliance with the provisions of 15A NCAC 2H 1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit This permit shall be effective from the date of issuance until January 25, 2018 and shall be subject to the following specified conditions and limitations I DESIGN STANDARDS 1 This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data 2 This stormwater system has been approved for the management of stormwater runoff as described in Section 16 on page 3 of this permit 3 Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit 4 The basin must be operated with a 50' vegetated filter 5 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 Page 2 of 7 State Stormwater Management Systems Permit No SW8 070568 6 The following design elements have been approved for this infiltration basin stormwater facility, and must be provided in the system at all times a Drainage Area, acres Onsite, ft2 Offsite, ft2 b Total Impervious Surfaces, ft2 Buildings, ft2 Parking, ft2 Other, ft2 Offsite, ft2 c Basin Depth, feet d Design Storm, inches e Seasonal High Water Table, FMSL f Bottom Elevation, FMSL g Permitted Surface Area @Bottom, ft2 h Permitted Storage Volume, ft3 1 Storage/Bypass Elevation, FMSL j Type of Soil k Expected Infiltration Rate, in/hr I Time to Draw Down, hours m Receiving Stream / River Basin n Stream Index Number o Classification of Water Body II SCHEDULE OF COMPLIANCE 294 127,886 0 122,190 0 122,190 0 20 15 200 220 5,984 14,682 240 Loamy sand 078 38 UT Mill Creek / WOK02 19-39-3-1 "SA" 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 The permittee is responsible for verifying that the proposed built -upon area for the project does not exceed the allowable built -upon area The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made 4 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 Any revision to the approved plans, regardless of size Project name change Transfer of ownership Redesign or addition to the approved amount of built -upon area 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 Filling in, altering, or piping of any vegetative conveyance shown on the approved plan Page 3 of 7 State Stormwater Management Systems Permit No SW8 070568 5 The Director may determine that other revisions to the project should require a modification to the permit 6 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 7 During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately Infiltration systems should not be used as erosion control devices, due to the potential clogging 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 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 9 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 filter media, bypass structures, orifice, catch basins and piping g Access to all components of the system must be available at all times 10 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 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 Prior transfer of the permit, the stormwater facilities will be inspected by DWQ personnel The facility must 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 13 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 14 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 Page 4 of 7 State Stormwater Management Systems Permit No SW8 070568 III GENERAL CONDITIONS This permit is not transferable to any person or entity except after notice to and approval by the Director In the event there is either 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 signed by both parties involved, accompanied by the appropriate documentation as listed on page 2 of the form 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 The permittee is responsible for compliance with all of the terms and conditions of this permit until such time as the Director approves the transfer request 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 8 The permittee shall notify the Division in writing of any name, ownership or mailing address changes at least 30 days prior to making such changes 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 25th day of January 2008 NMENTAL MANAGEMENT COMMISSION for uoieen H swans, Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 OFFICE USE ONLY Date Received Fee Paid I Permit Number State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This foi in mar be photocopied for rise as an origin( 1 GENERAL INFORMATION I Applicants name (specify the name of the corporation, individual etc who o«ns the project) Jones-Onslow EMC 2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance) Mr Hugh Batts, President 3 Mailing Address for person listed in item 2 above 259 Western Blvd City Jacksonville Telephone Number ( 910 ) 353-1 State N C Lip 28546 4 Project Name (subdivision, facility, or establishment name - should be consistent with project name on plain, specifications, letters operation and maintenance agreements, etc ) Jones Onslow EMC--Sneads Ferry District Office 1225 1JC Ht,,(, e? _10ZS4CoU 5 Location of Project (street address) NC Hwy 210 City Stump Sound Township County Onsl)w 6 Dnections to project (from nearest major intersection) From intersection of NC 172 & NC 210 in Sneads Ferry, south on NC 210 approx 1 3 miles Site on left 7 Latitude 340 32' 52" N Longitude 770 2602" W 8 Contact person who can answer questions about the project Name David K Newsom, PF, Crystal Coast Engmemng, PA 7 (.lcphone Number ❑ PERMIT INFORMATION I Specify whether project is (check one) X New Form SWU-101 Version 3 99 Pagc l of 4 of project 910 1325-0006 Rcne�sal 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 n/a and its issue date (if known) 3 Spewfy the type of project (cheek one) Low Dtnstty X high Density Redevelop Gtncral Permit _Other 4 Additional Project Requirements (check appheable blanks) _LAMA Major X Sedimentation /Erosion Control _404/401 Permit __NPDES Storniwater 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 fen flit project Hiph Densitv - Stormwater will be collected and treated in an infiltration basin 2 Stormwater runoff from this proleet drams to the White Oak (New River) Rix erbasin 3 Total Project Area 591 acres 4 Project Built Upon Area 474 5 How many drainage areas does the project haseo 6 Complete the following information for each drainage area It there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name UT to Mill Creek Receiving Strtatn Class SA,HQW Drainage Arca 127,886 sf (2 94 ac) Existing Impeivious* Area -0- Proposed Impervious*Area 122,190 sf (2 81 ac) % Impervious* Area (total) 95 6% impervious* Surface Area Drainage Area I Drainage Area 2 On -site Buildings _0_ On -site Streets -0_ On -sue Parking 122,190 sf On -site Sidewalks -0- Other on -site -0- Off-sue 0_ Total 122,190 sf (2 81 ac) Total * /nipenious urea is defined as the built upon area including but not limited to, buildings ioads parking areas, sidewalks gravel areas etc Fomi S WIJ-101 b ersion 3 99 Page 2 of 4 7 Flow was the off -site impervious area listed above derivedo n/a IV DEED RESTRICTIONS AND PROTECTIN E CO% ENANTS The following italicized deed restrictions and protective covenants arc 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 prosided as an attachment 1 The following covenants are intended to ensure ongoing compliance with state stotnnvater 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 ofanv lot shall be covered by structures of impervious materials Impel vrous matenak include asphalt, gravel concrete, brick stone, slate of similar material but do not include wood decking or the water surface of swumming pools 3 Sit ales shall not be filled in, piped or alteted eccept as necessai v to provide rh nvewas crossings d Built -upon area in excess of the permitted amount requires a state stormw met management petnnt modification prior to construction 5 All permuted tunofffr om outparcels orfnaure development shall be directed into the permitted stormwaten conti of sistem These connections to the stormwater control system shall be performed in a manner that maintains the uuegi sty and penformonce 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 apphcablc items required above, that the covenants will be binding on all parties and persons claming 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 the} will be recorded prior to the sale of any lot SUPPLEMLNT 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 fonts 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 -Sic System Supplenrcnt Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 Innovatne Best Management Practice Supplement Form SWU-101 Version 3 99 Page 3 of 4 VI SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reste%ed bN the Division of Water Quality (DWQ) Al complete package includes all of the items listed below The complete application package should be submitted to the appi opt Late DWQ Regional Office I Please indicate that you have provided the following required information by initialing in the space provided next to ea(,li item Initials • Original and one copy of the Stormwater Management Permit Application Form `IN • One copv of the applicable Supplemgtit Form(s) for each BMP • Permit application processing fee of $42,54payable to NCDENR) • Detailed narrative description of stormwater treatment/management • Two copies of plans and specifications including - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high cater line - Dimensioned property/project boundary - Location map with named streets or NCSR mmnbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads drainage features, collection systems and stormwater control measures - Wetlands delmt,atcd or a note on plans that none exist - Existing drainage (including off -site) draniagt, easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) V1I AGENFAUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this saction Designated agent (individual or firm) David K Newsom, PE, Crystal Coast Engineering, PA Mailing Address 3817-3 Freedom Way City Hubert State N C Zip 28539 Phone L 910 ) 325-0006 Fax ( 910 )325-0060 vlll APPLICANT'S CERTIFICATION 1, (print or type name ojperson listed in Geneial Information item 2) Mr Hugh Batts 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 appioved plans that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A NCAC 21-1 1000 _ n 1 / Signamrc Form SV U-101 Version 3 99 Page 4 of 4 Date 41tg�o 1 SGU 8 0705675 DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION Complete and email this form to Vincent Lewis@ncmad net If there are more than 7 areas to be tested, attach a second sheet Scheduled Site Visit Date I ZLL6 7 Time: Z J6 Protect Namejonrg9c 0,yszo,., Inc County ©A/s.joi Street Address N/0 — �ivr--rtrx fbzrz� Directions from the nearest intersection of two major roads Irr ersv%UC/7Z 't A/LZID. 5ov)-r ow 210 A77f�nc^,- 13 M /[-gi4 >1 acre being disturbed7QfES ONO CAMA Major required? ❑YES NO Consultant Name: ) IL A/aa„«r/V✓I Phone:,Jio 3L6-0OO6 Consultant Firm Name: (,tzvyT �n.a�, f /1/r�il rrJtiL� Bore Number 1 2 3 4 5 6 7 a) Existing Ground Elevation IZ b) Proposed Bottom Elevation 2 c) Difference (a minus b) d) Add 2 ft (Min Bore Depth) e Hardpan Depth? f) Infiltration Rate OK� g) Approx Elev Of SHWT h) Max lowest bottom elev 4cr4•.f� 61 0 SfA Required Attachments 1 Legible vicinity map 2 Complete Sods Report 3 PDF formatted site plan with the boring locations to be tested Site plans should be emailed or hand -delivered only Illegible faxed maps will not be accepted All proposed infiltration areas and existing, active utility Imes located within the proposed basin/trench must be marked and flagged If these areas are not flagged, the Sods Scientist reserves the right to decline to do the investigation If the proposed infiltration system will be located in an area of existing pavement and there is no open area nearby, equipment capable of breaking through the impervious layer must be provided The sods investigation does not take the place of a sods report prepared by an appropriate professional The Sods Scientist will only verify the sod conditions that are reported In the Sods Report, and make a determination as to the suitability of the site to meet the infiltration design requirements under NCAC 2H 1000, and assumes no liability should the system fad S \WOS\STORMWATER\FORMS\infiltration site visit for Revised 8 07 OWii/LUU/ UO lb 'JLU-JrU-LL1J JU i r1GKUt OUKVCYUK r"UI_ U1 1073-1 Gregory Fork Road rtunianas, ivi_ 2ct)/4 Phone (910)324-2892 r" (Yf U) J24-0t UL pittmansoil rt yahoo com August 29, 2007 JOFMC clo John L Pierce 40Y Johnson Blvd Jacksonville, NC` Ref ,Coil Infiltration Rates and Seainnal Water Table Dear Sir, A site evaluation was conducted on your property located on Hwy 210 in the Sneads Ferry area of Onslow Couniv The property is identified as OnslOW County Tax Parcel #766-6 6 and islapproximately 5 91 acres in size per Onslow CountyGIS The current 1 xws and ales of NC were used as a guide for this evaluation Thepurpose of this evaluaion was Io map the seasonal water table and establish an infiltration rate Auger borings 4vealed a water table between 50"and 54' below the ground surface This waJ determined using the Mantel! soil Color chart to idenhfv mottles of chroma � or less Auger boring descriptions are shown on attachment N1 In situ conductivity measurements ere performed with a compact constant head permeameter The most hydraulics ly limiting horizon was found to be between 24 and 36" below the surface Th� rate of this horizon was 52" to 78 per hour The horizons above Enid heloiv this layer had a rate of =1 8' per hour to 5 'per hour ll To decrease the size of the infiltrationdn basin it it recommended to excavate the Bi horizon and backfrll, to thr more permeable horizon may be used All permits will be rssuedbv the stall and are subject to all rules ofthe county and state The findings are based oit the conditions of the site at the time of evaluation, and any alterations mayl adversely impact the results 1 782/ TlNPOAAAY DIYlRQON ElRH l l` 1 1 .nn `l f1 6 U . 21b ' ♦].6] ' Y]S]1 a , � O 1 / F i TrNPMURY : ❑ EVl!Dslo // •x•S ` BFRSIOA. e� / BlR11 ` « `F P AR0a-,-ALT I PMTMO/9TORA7F � ♦i°b 1 6{ A H ]. I { f \ M f V .xa ti aca \ „ VI , nn ` / . ]. 6I l 09 .]..] .]ae A \� •Nn / � \ ,]ace / .x]si u j \ / Z94 l / RY BERM \lRN / ].ie ]i 11 W 1.{TAL M[W M+eAF]e 10� • Z ?>/ p i w stt•ta as w g191F NOTE - Mal IN ALL PHASES OF CONSTRUCTION CONTRACTOR IS TO STAY WITHIN I THE GRADING LIM2T9 AS SHOWN ON HEREON THIS ALSO INCLUDES r ALL MACHINERY USED IN THE CONSTRUCTION UNDER NO a_ CIRCUMSTANCE SHALL CONTRACTOR ENCROACH BEYOND THE a c❑ t t 09/17/2007 08 16 910-346-1210 JOHN PIERCE SURVEYOR PAGE 05 r'NVQa9 'WV 99 ££ 9 Z9oZ/£I/6 9Ma 01Z 7W30f 0mao 3AVO - 01Z NO MOISNO S3NOf m:wON& g 09/17/2007 08 16 910-346-1210 JOHN PIERCE SURVEYOR PAGE 03 AUGER BORINGS OF IOEMC Hwy 210 BORING 1 DEPTH (") TEXTURE STRUCTURE MINERALOGY MATRIX MOTTLES MOTTLES WETNESS 01 LS GR NS NE 2 5Y4/1 NONE >48" 1-4" LS GR NS NE 2 SY7/1 NONE 4-18 LS GR NS NE 2 5Y6/6 2 SY7/3 18-36" SCL SBK NS NE 10YR5/8 NONE 36-08" SL GR NS NE 10YR5/8 NONE BORING 2 DEPTH {") TEXTURE STRUCTURE 01" LS GR 1-3" LS GR 3-23" LS GR 23-35" SCL SBK 35-38" LS GR 38-60" SL GR BORING 3 MINERALOGY MATRIX NS NE 2 5Y4/1 NS NE 2 5Y7/1 NS NE 2 SY6/1 NS NE 10YR5/8 NS NE 2 5Y7/2 NS NE 1OYR5/8 MOTTLES MOTTLES WETNESS NONE NONE NONE NONE 2 5Y7/3 N2 5Y6/1 54" DEPTH (") TEXTURE STRUCTURE MINERALOGY MATRIX MOTTLES MOTTLES WETNESS 0 1" LS GR NS NE 2 5Y4/1 NONE 1-6" LS GR NS NE 2 5Y7/1 NONE >60" 5-23" LS GR NS NE 2 5Y6/4 2 5Y7/3 43.36 SCL SBK NS NE 10YR6/8 NONE 36-60" SL GR NS NE 10YR5/8 NONE / SOIL SC¢� rztf7).0�92 ,�T�1262 o 09/17/2007 00 16 910-346-1210 JOHN PIERCE SURVEYOR PAGE 02 11you have any questions please fee! free to contact meat 910-330-2784 Thank You Sincerely, R Haywood Pittman 1I NC Licensed Soil Scientist SOIL S�O�*"� ��404 PiA \\F NORTH ��/ WAT I'r A67 wwA 1 err Y November 27, 2007 Hugh Batts, President Jones-Onslow EMC 259 Western Boulevard Jacksonville, NC 28546 Michael F Easley Go%emor Wdham G Ross Jr Secretary North Carolina Department of Em uonment and Natural Resources Subject Request for Additional Information Stormwater Project No SW8 070568 Jones-Onslow EMC Sneads Ferry District Office Onslow County Dear Mr Batts COILcn 11 Sullins Director Do tston of Water Qualm The Wilmington Regional Office received a Stormwater Management Permit Application for Jones-Onslow EMC Sneads Ferry District Office on October 4, 2007 A preliminary review of that information has determined that the application is not complete The following information is needed to continue the stormwater review The request for a site visit by our soils scientist to verify the soils was only discovered today I have reminded the consultant to please submit these requests directly to the soils scientist or to the Express coordinators, as my involvement in the day-to-day operations of the regular stormwater permitting program continues to drop off until I have finished up most of my existing projects Upon receiving a satisfactory soils evaluation from the soils scientist, can proceed with the permitting of this protect I do not have any other comments in regard to this project Please note that this request for additional information is in response to a preliminary review The requested information should be received in this Office prior to December 27, 2007, or the application will be returned as incomplete The return of a protect will necessitate resubmittal of all required items, including the application fee If you need additional time to submit the information, please mail, email or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter The request must indicate the date by which you expect to submit the required information The Division is allowed 90 days from the receipt of a completed application to issue the permit The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215 1 and is subject to enforcement action pursuant to NCGS 143-215 6A Please reference the State assigned protect number on all correspondence Any original documents that need to be revised have been sent to the engineer or agent All original documents must be returned or new originals must be provided Copies are not acceptable If you have any questions concerning this matter please feel free to call me at (910) 796-7301 or email me at linda lewis(a)ncmail net N''oppehCarohna wa7&ra//y North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796 7215 Customer Ser. ice Wilmington Regional Office Internet w,w nL aterguahtN org Fax (910) 350 2004 1-877 623 6748 An Equal Opportunity/Affirmative Acton Employer — 50% Recycledll0 % Post Consumer Paper Mr Batts November 27, 2007 Stormwater Application No SW8 070568 Sincerely, � � ,�ifi 64' �d Linda Lewis Environmental Engineer III ENB/arl S\WQS\STORMWATER\ADDINFO\2007\070568 nov07 cc David Newsom, P E , Crystal Coast Engineering Linda Lewis Page 2 of 2 Jones-Onslow EMC SW8 070568 Subject: Jones-Onslow EMC SW8 070568 From Linda Lewis <hnda lewis@ncmail net> Date- Tue, 27 Nov 2007 15 44 59 -0500 To Dave Newsom <crystalcoasteng@bizec rr com> Dave Attached please find my review comments for the subject project Linda 070568.nov07.doContent-Type: application/msword c Content -Encoding- base64 1 of 1 11/27/2007 4 10 PM Jones Onslow EMC Sneads Ferry Office SW8 070568 Subject. Jones Onslow EMC Sneads Ferry Office SW8 070568 From. Linda Lewis <lmda lewis@ncmail net> Date: Thu, 08 Nov 2007 13 11 02 -0500 To Betty Bullock <BettyB@Jlpnc com> Betty Rhonda located this package in her office It was bound with additional information for the 970211 Jones Onslow EMC project that Rhonda is is reviewing, and it was received on October 4, 2007 Review of the information will take place sometime before December 18, 2007 In the future, when you submit packages for different projects to different reviewers, please remember to provide separate cover letters addressed to the correct reviewer and please put the stormwater project number somewhere on your transmittal sheet and on the cover letter This will greatly assist us in locating the packages quickly Thanks Linda 1 of 1 11/8/2007 1 17 PM Sry &'? 0705(08 / • ' DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION Complete and email this form to Vincent Lewis@ncmail net If there are more than 7 areas to be tested, attach a second sheet Scheduled Site Visit Date Time Protect Name.✓O'r� UvcL'cil z 4EMc County OAt sL Yt., Street Address, Directions from the nearest intersection of two major roads F/_r'm (✓r�eis_ c frv,-i 1"- %VL,/72 It Y6LZID SDL/0 1J-(-2r_)nC)V t,3 r? >1 acre being disturbed7QfES [:]NO CAMA Major required? ❑YES gO Consultant Name•D/iyio fL AAn"eriv✓i Phone.sl/o 3LjDUOb Consultant Firm Name: (' rz vy ziu ce Bore Number 1 2 3 4 5 6 7 a) Existing Ground Elevation 2 b) Proposed Bottom Elevation 2 c) Difference (a minus b) d) Add 2 ft (Min Bore Depth) e) Hardpan Depth? 0 Infiltration Rate OK � /, 8i' ti� g) Approx Elev Of SHWT h) Max lowest bottom elev 0 4 2007 DWQ Required Attachments PROJ # 1 Legible vicinity map 2 Complete Soils Report 3 PDF formatted site plan with the boring locations to be tested Site plans should be emailed or hand -delivered only Illegible faxed maps will not be accepted All proposed infiltration areas and existing, active utility lines located within the proposed basin/trench must be marked and flagged If these areas are not flagged, the Soils Scientist reserves the right to decline to do the investigation If the proposed infiltration system will be located in an area of existing pavement and there is no open area nearby, equipment capable of breaking through the impervious layer must be provided The soils investigation does not take the place of a soils report prepared by an appropriate professional The Soils Scientist will only verify the soil conditions that are reported in the Soils Report, and make a determination as to the suitability of the site to meet the infiltration design requirements under NCAC 2H 1000, and assumes no liability should the system fail S \WQS\STORMWATER\FORMS\infiltration site visit for Revised 8 07 Design Calculations Infiltration System for Jones Onslow EMC Sneads Ferry District Office N C 210 — Sneads Ferry December 8, 2006 1 Project Description The project consists of construction of a parking and storage area on a 5 91 acre tract located off NC 210 in Sneads Ferry, N C This site is located adjacent to unnamed tributary to Mill Creek, SA,HQW 2 Design Requirements Project will be designed in accordance with NC Administrative Code Section 15A NCAC 2H 1000 — Stormwater Management (hereinafter "Regulations") This site is in the category of "development activities within within one-half mile of and draming to SA water" Due to density, the project is considered "high density development" In accordance with Section 1105(2)(b) of the Regulations, an infiltration system designed to accommodate 1-1/2" of rainfall will be required Furthermore, runoff in excess of the design volume must flow overland through a vegetative filter 3 Impervious Surface Areas On -site Buildings -0- On-site Streets -0- On-site Parking 122,190 sf On -site Sidewalk -0- Other (Dumpster Pads, Concrete Pads, Sign) -0- Reserve for Future -0- sf TOTAL 122,190 sf Drainage Area = 127, 886 sf Percent Impervious 4 Design Volume = 122,190 sf/ 127,886 sf = 95 55 % In accordance with Section 1008(c)(1), the required design volume is computed as follows Using Schuler "Simple Method" Rv = 0 05 + 0 009(1) where I = Percent Impervious (95 55%) = 0 9099 in/m Design Volume = Design Rainfall (1 5") x Rv x Drainage Area = 1 5" x 0 9099 x 127,886 sf = 174,548 in-sf or 14,546 cf 5 Storage Volume The "Storage Area" is sized to accommodate in excess of 14,546 cf Using average end method, actual Storage Area Volume is Avg Incr Elev Area Area Depth Volume 2200 5,984 2400 8,698 7,341 200 14682 Total 14,682 cf 6 Infiltration Time Actual storage volume is required to mfiltrate completely within 5 days The Storrnwater Infiltration Basin Report (Soil & Site Evaluation) (copy attached) indicates that existing soil conductivity can be as high as 5 00 in/hr Assuming conservatively that existing sods have a minimum hydraulic conductivity of 1 8 m/hr, infiltration rate is computed as follows Infiltration Rate = Hydraulic Conductivity x Basin Bottom Surface Area = (1 8 in /hr) x (5,984 sf) x (1 ft /12 in ) = 897 6 cf/hr Draw Down Time is then calculated Draw Down Time = Actual Volume / Infiltration Rate 14,682 cf / 897 6 cf/hr = 16 4 hr (< 5 days) Swale Calculations Protect Jones Onslow Sneads Ferry Vegetated Filter By DKN Procedure Adjust y until Zav = zreq Where Let B = bottom width n = 0 05 y = trial depth A=By+My2 M = 3 P = B + 2y(1+M2)1¢ R=A/P z,, = ARv3 Use n = 02 for earth lined n = 03 for mowed grass n = 05 for unwowed grass n = 013 for concrete lined n = 035 for no rao II Location I Qio I S I z.. I B I v I A I P I R I za I VEL I K MfichaelF Easle% Go,emor William G Ross Jr Secretary North Carolina Department of hmnonment and Natural Resources Coleco H Sullins, Director Dnision of Watei Quaht% August 16, 2007 Hugh Batts, President Jones-Onslow EMC 259 Western Boulevard Jacksonville, NC 28546 Subject Request for Additional Information Stormwater Project No SW8 070568 Jones-Onslow EMC Sneads Ferry District Office Onslow County Dear Mr Batts The Wilmington Regional Office received a Stormwater Management Permit Application for Jones-Onslow EMC Sneads Ferry District Office on May 29, 2007 A preliminary review of that information has determined that the application is not complete The following information is needed to continue the stormwater review _ Ir , 1 Please either delineate all wetlands on site, disturbed or undisturbed, or note on the plans that none exist The protect appears to be within '/z mile of SA waters Please provide either a to - scale topographic map with the site and the receiving stream accurately located, which demonstrates that the protect is more than '/2 mile from SA waters, or redesign the proposed wet detention pond to an infiltration basin 3 The application indicated that this was a modification, but no permit number was provided If this is to be a modification, you need to provide the information for the existing pond on the application For simplicity, the Division has assigned a new permit number for this protect alone, that does not Include the existing protect Please note that this request for additional information is in response to a preliminary review The requested information should be received in this Office prior to September 16, 2007, or the application will be returned as incomplete The return of a protect will necessitate resubmittal of all required items, Including the application fee If you need additional time to submit the information, please mail, email or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter The request must indicate the date by which you expect to submit the required information The Division is allowed 90 days from the receipt of a completed application to issue the permit The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215 1 and is subject to enforcement action pursuant to NCGS 143-215 6A Or, N'op hCarohna ,vatura//y North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington NC 28405 Phone (910) 796 7215 Customer Scrn ice Wilmington Regional Office Internet www ncwalerauahn ore Fax (910) 350 2004 1 877 623 6748 An Equal OpportunitylAKrmanve Action Employer — 50 % Recycledl10% Post Consumer Paper Mr Batts August 16, 2007 Stormwater Application No SW8 070568 Please reference the State assigned protect number on all correspondence Any original documents that need to be revised have been sent to the engineer or agent All original documents must be returned or new originals must be provided Copies are not acceptable If you have any questions concerning this matter please feel free to call Ed Beck at (910) 796-7215 or email the reviewer at linda lewis(cDncmail net Sincerely, Rick Shiver Assistant Director for Regional Operations RSS/ENB/arl S\WQS\STORMWATER\ADDINFO\2007\070568 aug07 cc Dave Newsom, P E , Crystal Coast Engineering ��:Lmda Lewis`` � Page 2 of 2 _ JOHN L. PIERCE & ASSOCIATES, P.A LANDSURVEYING— LANDPLANNING— MAPPING ail P O 13OX 1685 JACKSONVILLE NC28541 OFFICE (910) 346-9800 1 AX (910) 346-1210 E-MAIL bun lil'11pnL coin Or briani n1pnc Loin TO Rhonda Hall N C Department of Environment and Natural Resources — Department of Stormwater 127 Cardinal Drive Extension Wilmington NC 28405 i Letter of Transmittal DAIS C /- ,00 O Mas 25 2007 J VV ATTENTION Rhonda Ilall Re Jones-Onslokt EMC Sneadc Fer Dictnct Office COPIES DATE NUMBER DESCRIPTION 2 Sets of plans 1 2 Stormwater permit application with calculations & narrative 1 Check in the amount of $420 00 for Modification fee MAY 2 9 2007 REMARKS SIGNED �( 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 WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWO Stormwater Management Plan Review A complete stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details I. PROJECT INFORMATION Project Name Jones Onslow EMC--Sneads Ferry District Office Contact Person David K Newsom, PE, Crystal Coast Engmeermg, PA Phone Number ( 910 )325-0006 For projects with multiple basins, specify which basin this worksheet applies to 1 and only elevations Basin Bottom Elevation 1400 ft Permanent Pool Elevation 1900 ft Temporary Pool Elevation 2008 ft areas Permanent Pool Surface Area 8,889 sq It Drainage Area 591 ac Impervious Area 281 ac (floor of the basin) (elevation of the orifice) (elevation of the discharge structure overflow) (water surface area at the orifice elevation) (on -site and off -site drainage to the basin) (on -sue and off -site di ainage to the basin) volumes Permanent Pool Volume 24,883 cu ft (combined volume of main basin andforebay) Temporary Pool Volume 10,461 cu ft (volume detained above the permanent pool) Forebay Volume 5,125 cu ft (approximately 20% of total volume) Other parameters SAIDA r 3 325 (surface area to drainage area ratio from DWQ table) Diameter of Orifice 125 in (2 to 5 day temporary pool draw -down required) Design Rainfall 1" in Design TSS Removal 2 90 % (minimum 85% required) Fona SWU-102 Rev 3 99 Page I of 4 YA w Footnotes I When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth Linear interpolation should be employed to determine the correct value for non- standard table entries 2 in the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90% TSS removal The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal II REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N C Department of Environment, Health and 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 If a requirement has not been met, attach justification Applicants Initials a The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet) b The forebay volume is approximately equal to 20% of the basin volume c The temporary pool controls runoff from the design storm event d The temporary pool draws down in 2 to 5 days e If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) f The basin length to width ratio is greater than 3 1 g The basin side slopes above the permanent pool are no steeper than 3 1 h A submerged and vegetated perimeter shelf with a slope of 6 1 or less (show detail) i Vegetative cover above the permanent pool elevation is specified j A trash rack or similar device is provided for both the overflow and orifice k A recorded drainage easement is provided for each basin including access to nearest right- of-way 1 If the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin _ in A mechanism is specified which will drain the basin for maintenance or an emergency F610? III WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided This system (check one) 0 does does not incorporate a vegetated filter at the outlet. This system (check one) 0 does sloes not incorporate pretreatment other than a forebay. Form S W U-102 Rev 3 99 Page 2 of 4 Maintenance activities shall be performed as follows After every significant runoff producing rainfall event and at least monthly a Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed 2 Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed Inspect and repair the collection system (i a catch basins, piping, swales, riprap, etc ) quarterly to maintain proper functioning Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below) Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i e stockpiling near a wet detention basin or stream, etc ) The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments When the permanent pool depth reads 375 feet in the main pond, the sediment shall be removed When the permanent pool depth reads Sediment Rem val El 1525 75 Bottom Eleva on 14 00 FOREBAY 375 feet in the forebay, the sediment shall be removed BASIN DIAGRAM ill in the blanks) Permanent Pool Elevation 19 00 Sediment Removal Elevation 15 25 75% -----------------------1- ___ Bottom Elevation 14 00 MAIN POND Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface These plants shall be encouraged to grow along the vegetated shelf and forebay berm If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical Form SWU-102 Rey 3 99 Page 3 of 4 7 All components of the wet detention basin system shall be maintained in good working order I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance procedures listed above I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party Print name Mr Hugh Batts Title President Address 259 Western Blvd, Jacksonville, NC 28546 Phone Signatt Date Note The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president Norma W. Bacn , a Notary Public for the State of North Canoana County of OhsQow , do hereby certify that Hugh Ba.tt.s personally appeared before me this 23 day of May 2007 and acknowledge the due execution of the forgoing wet detention basin maintenance requirements Witness my hand and official seal, °°eeeeeeelle►►►►► °O°°��yt1�:�, a ►4►� NOTARY e O OZ:. PUBLIC ..W..O�N ° IIe�°.eeee SEAL vw.R My commission expires 3126109 Form SWU-102 Rev 3 99 Page 4 of 4 Design Calculations Stormwater Treatment Facilities for JONES ONSLOW EMC - SNEADS FERRY DISTRICT OFFICE located In ONSLOW County 1 PROJECT DESCRIPTION THIS POND IS DESIGNED FOR ASPHALT PARKING LOT 2 COMPUTE POND AREA REQUIRED a Compute Percent Impervious Impervious Areas On -Site Buildings On-Srte Streets On -Site Parking On -Site Sidewalks Other on -site Off -site Sub -Total FUTURE(reserved) Total Total Area Drainage to Pond Percent Impervious = b Compute Pond Surface Area 0eS 0, • EAL 18148 Z _ O F�ritN ;9 y NC�s ,j_r 67 Existing Proposed Total 0 SF 0 SF Q > 9 122,190 SF 0 O 0 122,190 122,190 SF SF 0 122,190 122,190 SF 0 475 or 475 % Using Surface Area to Drainage Area Ratio Chart for 90% TSS Removal (copy attached) and assuming AaSi 53foot pond depth SA/DA=%(interpolated) Therefore Surface Area = SA/DA x Drainage Area RECEIVED8,554 SF say „,fl(iff SF MAY 2 9 2007 SF PROJ# S(nj-80-�-v5(28 c Compute Minimum Pond Dimensions Assume rectangular shape wdh 3 1 Length (L) to Width (W) Ratio Length = 164 32 feet Width = 54 77 feet Site conditions, however, dictate Hydr Length= raw';? x {iEfeet so, Hydr Width 54 5 feet (avg) Actual L/W = 3 0 (irregular shape) 3 DETERMINE VOLUME TO BE CONTROLLED FROM 1" STORM Using Schuler "Simple Method" Rv = 0 05 + 0 009(I) where I = percent impervious Rv = 0 477 in/in Control Volume = Design Rainfall x Rv x Drainage Area Control Volume = 10,236 CF say g 1p,BtII3 CF 4 DETERMINE REQUIRED STORAGE DEPTH Assume 3 1 side slopes solving for depth (d) by trial & error d = 1 08 5. DETERMINE ORIFICE SIZE Control Volume must be drawn down over a 2 day - 5 day period Using onfice equation, solve for Diameter (D) that results in 3-1/2 day period D=(Q/0026(h)e)s Where Q = (Control Volume / 3 5 days x 86,400 sec/day) 0 035 cfs h=d/2 = 054 Solving for D D= 135 Use ur';y1:5"pipe Actual Drawdown with actual drawdown pipe diameter (using orifice equation) Q= 0 030 cfs Draw Down Period = 4 07 days OK, < 5 0 6 SELECT OUTLET STRUCTURE DIAMETER Size outlet structure such that depth of Q10 Flow <1 0 feet Using Rational Formula (Q=CIA) where Camper =, ;; 9, Cpery = Q. Ccum = 048 I10 =$41%in/hr A= 591 ac Q10 = 18 62 cfs Assuming 1/2 circumference is used as weir and using Francis Formula (Q=3 331-1-1' 5) to solve for L such that H = 1 0 L= Min Use 7 DETERMINE Q10 STAGE 5 59 Feet 42 inch diameter outlet structure 42 inch diameter outlet structure Q10 = 18 62 cfs Using Francis Formula (Q=3 33LH' 5) solve for H H 10 = 1 01 feet 8. DETERMINE Q100 STAGE (ELEV OF EMERGENCY SPILLWAY) Using Rational Formula (Q=CIA) where Ccum = 048 1100 = ae; - x <$ d(j m/hr A= 591 ac 0100 = 22 91 Using Francis Formula (Q=3 33LH' 5) solve for H H 100 = 1 16 feet 9 DETERMINE Q100 STAGE OVER EMERGENCY SPILLWAY (TOP BERM ELEV ) Assume primary spillway blocked (i e , emergency spillway to accommodate Q100) Emergency spillway shall be a broad crested earthern weir designed to pass 100 year storm Using broad crested weir equation H = (Q/Cw x L)2/3 where Q = Q100 22 91 cfs Cw=30 Length = " ru; feet H = 0 40 feet 10 FOREBAY SIZING Compute Actual Pond Volumes (using average end method) Avg Incr Incr Cum Main Bey Volume Elevation Area (SF I Area (SF) Depth (FT) Vol (CF) Vol (CFl Pond Bottom 14.00 2,185 Bottom Veg Shelf 17.33 3,00 3,088 333 10,281 10,281 Normal Pond 19116 - 1,359 5,675 1 67 9,476 19,758 Main Bay Volume = 19,758 CF Forebay Volume, Elevation Area (SF) Area (SF l th (FT) Vol (CF) Vol (CF) Pond Bottom 1400 620 Normal Pond 1900 1,530 1,025 500 5,125 5,125 Forebay Volume = 5,125 CF Total Pond Volume = 24,883 CF Forebay Volume equates to 20 6 % of Total Volume Temp. Storage Volume Elevation Area (SF 1 Area (SE Depth (FT l Vol (CF) Vol (CFl Normal Pond 1900 8,889 Temp Pond Level 20,PLF 10,484 9,687 1 08 10,461 10,461 Temp Pool Volume = 10,461 CF 10 Yr Storage Volume_ Elevation Area (SF) Area (SF l Depth (FT I Vol (CF 1 Vol (CFl Temp Pond Level 2008 10,484 Temp Pond Level 21 t 11,882, 11,183 1 01 11,309 11,309 Temp Pool Volume = 100 Yr Storage Volume Temp Pond Level Temp Pond Level Temp Pool Volume = 11 SUMMARY Pond Elevations Top Berm (minimum) 100-Yr Flood 10-Yr Flood 1-inch Storage 11.309 CF Elevation Area (SF) Area (SF) De t1hh (FT) Vol (CF) Vol (CF1 2008 10,484 2124 , 12,095 11,290 1 16 13,112 13,112 13,112 CF H= 0 40 H100= 116 H10= 101 storage depth = 108 Permanent Pool pond depth = 5 Pond Bottom 12 WET DETENTION BASIN SUPPLEMENT Basin Bottom Elevation 1400 Perm Pool Elevation 1900 Temp Pool Elevation 2008 Perm Pool Surface Area 8,889 SF Drainage Area 5 91 AC Impervious Area 2 81 AC Perm Pool Volume 24,883 CF Temp Pool Volume 10,461 CF Forebay Volume 5,125 CF SA/DA 3 325 Diameter of Orifice 125 Design Rainfall V. Design TSS Removal 90% Relative Actual 764 21 64 724 21 24 (emerg weir elev) 709 21 09 608 20 08 (primary weir elev) 500 19t pp0pp0 (invert out elev) 0, F ,.w�IaVIFt Stormwater Treatment & Erosion Control Narrative Jones-Onslow EMC — Sneads Ferry District Office Jones-Onslow EMC proposes to construct an asphalt parking area on a 5 91 acre tract located on NC Hwy 210 approximately 1 3 miles south of its intersection with NC 172 in Sneads Ferry, NC The proposed parking area will serve as additional parking for the existing, adjacent site to the north (All stormwater from the adjacent site will continue to drain into the existing stormwater pond ) The site is currently undeveloped The project site is located less than 0 5 miles from an UT of Mill Creek (SA, HOW) in the White Oak Basin The proposed development activities are high density (percent impervious > 25 %), therefore, stormwater treatment facilities are required The attached Stormwater Plan includes a 8,889 sf wet detention basin at the southern boundary of the site The pond is sized to accommodate 122,190 square feet of impervious area (all asphalt parking) associated with the proposed project The proposed pond is sized for 90% TSS removal The pond does not incorporate pretreatment, other than the forebay The pond does not include a vegetated filter at the outlet All stormwater emanating from new impervious surfaces that is generated on -site shall be collected and directed to the forebay of the proposed stormwater pond by a system of sheet drainage, asphalt swales and storm drainage pipes The treatment system will require periodic maintenance Maintenance frequency shall be dictated by pond depths Pond depths shall be checked by the owner on a quarterly basis When measured depths are less than 3 75' (for the main pond as well as the forebay), the pond shall be manually dewatered (pump) and accumulated sediment removed and properly disposed of Site topography is gently sloping (0 — 5%) generally draining to the south and southwest Sods are loamy sand/sandy loam The entire area designated within "Clearing Limits" will be disturbed during initial construction, and will include grading for parking and storm drainage The proposed stormwater pond shall be used for sediment storage during construction Silt fence will be constructed along downslope boundaries of the tract and at downslope areas of the limits of disturbance and inlet protection will be installed on all drop inlets to prevent sediment loss \ ♦ xv U Ilk ✓U � o Lki �-"t/'�� n n 4 11 jpx r �• I' , .A l� =lam N � 2 { � 4 , 10 �� 5 � ' •11 fl 11 � 1�, 11 -_ �. ♦ .—.....-Tµ _ 1 1_` _ � :1 •III III II _ �1_ l_ 3� S ♦ `, 11�� '� ____xcr` :.lTill _ `„ �� I atAA ` {1 ♦ a IT N II ill _ n It 29 26 Jones-0nslow • •• 25 k I EMC Sneads Feny v N I , \ oblle Home Pa, " v tt' , • • `tfii '(`ir ,i4t, 4 'll ai ) IT � 11 II 2 II I 1,4 II�NI r \ "e �1l � SIB li '{i ',. .. ..• '1 1• I,i '4� I l it � • S T, 4 ,1 1 • H i, , t _ , � � � � I � e I •• 4 ,� p v 7(.s _t{ sj 4,'" 14;••`nI.N '� `C. .)4' y�`'� lr"{` rY 4�tit`,` - 'i f-� tN)�,•)�`i95� `yi•I tt E,1t```�G�ii �•P♦ `ate_ y �r Wul�el _ £I ^a.i��x`�� -'.k �4'+�`.'�ai?+��^� zA� `'r '�${i v�9`I �� q"�7d �, • 4 r.'�Id, •� 5 �.-'s:. - '^ 1' �n tt ,v a .4 �i�� x t t' •4.1 _-� 4' A u4`c"--j az .•-��, �r �r�K ��•_ ��r �.; � :,-. ��.* ��, �• �l '�� ,�1i h^',• i�'� U 4,. { 'c `e..•» i .'..?- `y�����f���o- a � .i�`I,{ �1�xs �r' ' . x' �- �' LLICATOR;,"`'< •- .<, _ s ,;BAYI;.*:;" Name SNEADS FERRY Location Date 5/9/2007 Scale 1 inch equals 2000 feet copYn9nt (tr) 2005 Maptech Inc OFFICE USE ONLY Date Received Fee Paid Permit Number 2cf-2cq� I-5� of ooeq # I �F&&o 560 X O �4 OS65.0 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 anginal GENERAL INFORMATION 1 Applicants name (specify the name of the corporation, individual, etc who owns the project) Jones-Onslow EMC 2 Print Owner/Signing Otficial's name and title (person legally responsible for facility and compliance) Mr Hugh Batts, President 3 Mailing Address for person listed in item 2 above 259 Western Blvd City Jacksonville Telephone Number ( 910 State N C Zip 28546 4 Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc ) Jones Onslow EMC--Sneads Ferry District Office 5 Location of Project (street address) NC Hwv 210 City Stump Sound Township County Onslow 6 Dnections to project (from nearest major intersection) From intersection of NC 172 & NC 210 in Sneads Ferry, south on NC 210 approx 13 miles Site on left 7 Latitude 34° 32' 52" N Longitude 77° 26' 02" W 8 Contact person who can answer questions about the project Name DawdK Newsom, PE, Crystal Coast Engmeenng,PA Telephone Number ( 910 II PERMIT INFORMATION 1 Specify whether project is (check one) New Renewal Form SWU-101 Version 3 99 Page 1 of 4 of project 325-0006 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 n/a and its issue date (if known) 3 Specify the type of project (check one) _Low Density _X _High Density _Redevelop __General Permit _Other 4 Additional Project Requirements (check applicable blanks) _CAMA Major X Sedimentation /Erosion Control 404/401 Permit __NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748 III PROJECT INFORMATION 1 In the space provided below, summarize how stormwater will be treated Also attach a detailed narrative (one to two pages) describing stormwater management for the project Hieb Densitv - Stormwater will be collected and treated in a wet detention basin 2 Stormwater runoff from this project drains to the White Oak (New River) River basm 3 Total Project Area 591 acres 4 Project Built Upon Area 475 5 How many drainage areas does the project have9 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 uBasuiaTrifom atioii F �u � � _ � T 1 Drratnage Area F tfi � ss D ainag Aiea:2t" _? I Receiving Stream Name UT to Mill Creek Receiving Stream Class _ SA,HQW _ 257,276 sf (5 91 ac) Drainage Area Existing Impervious* Area -0- Proposed Impervious*Area 122,190 sf (2 81 ac) % Impervious* Area (total) 47 5% s -" ' '7s"TM�=�1a` ImpervtousixtSurfaZ.ceyArea i #,'iDraitia eAi•ea5i14 „ :2 b4 gv •* xa a ,?'�iDrain es'Areat2h-, r e 3z ,,.ao On -site Buildings -0- On-site Streets -0- On-site Parking 122,190 sf On -site Sidewalks -0- Other on -site -0- 0 -site -0- Total 122,190 sf (2 81 ac) Total * Impervious area is defined as the built upon area including but not limited to, buildings, roads parking areas, sideiva/ks giavel areas etc Fonn SWU-101 Version 3 99 Page 2 of 4 How was the off -site impervious area listed above denved9_n1a 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 I The following covenants are intended to ennui a 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 squat a feet of anv lot shall be covered by structures or impervious mate) talc Impervious materials include asphalt, gravel, concrete, brick stone, slate or similar material but do not include wood decking or the water surface of swimming pools 3 Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings 4 Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to construction 5 All permitted iunofffrom outparcels or future development shall be directed into the permitted stormwater control system These connections to the stormwater control system shall be peiformed 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 VI SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ) A complete package includes all of the items listed below The complete application package should be submitted to the appropriate DWQ Regional Office Please indicate that you have provided the following required information by initialing in the space provided next to each item pals Original and one copy of the Stormwater Management Permit Application Form One copy of the applicable Supplement Form(s) for each BMP Permit application processing fee of $420 (payable to NCDENR) Detailed narrative description of stormwater treatment/management Two copies of plans and specifications, including - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned propertylproject 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) David K Newsom, PE, Crystal Coast Engineering, PA Mailing Address 3817-3 Freedom Way City Hubert State N C Phone [ 910 1 325-0006 Fax VIII APPLICANT'S CERTIFICATION Zip 28539 325-0060 1, (print or type name ofperson listed in General Information, item 2) Mr Hugh Batts 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 21-1 1000 / - , , . Signature Form SVU-101 Version 3 99 Page 4 of 4 5231 61 Date )