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HomeMy WebLinkAboutSW8031206_CURRENT PERMIT_20040917STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE WYYMMDD OF WALkq Michael F Easley, Governor C. G William G Ross, Jr , Secretary cry 7 - North Carolina Department of Environment and Natural Resources 0 Alan W Klimek, P E Director Division of Water Quality September 17, 2004 Mr --Charles Yopp, Owner Coastal Mint Storage Post Office Box 295 Sneads Ferry, NC 28460 Subject: Stormwater Permit No. SW8 031206 Coastal Mini Storage High Density Project Onslow County Dear Mr Yopp The Wilmington Regional Office received a complete Stormwater Management Permit Application for Coastal Mini Storage on September 14, 2004 Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H 1000 We are forwarding Permit No SW8 031206 dated September 17, 2004, for the construction of the subject project This permit shall be effective from the date of issuance until September 17, 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 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 Rhonda Hall, or me at (910) 395-3900 Sincerely, Rick Shiver Regional Supervisor Surface Water Protection Section S RSSlrbh S 1WQSISTORMWATIPERMIT1031206 sep04 cc William G Simmons, Jr, P E , Cavanaugh & Associates, P A Onslow County Building Inspections Division of Coastal Management Rhonda Hall_4 Wilmington-Regional'Of�ce Central Files North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone (910) 395 3900 Customer Service1 877.623-6748 Wilmington Regional Office Wilmington, NC 28405 3845 FAX (919) 733 2496 Internet h2o enr state nc us IY��`hCarohna Amura!!Y An Equal OpportuniWAifirmatve Acton Employer— 50% Recycledl10% Post Consumer Paper State Stormwater Management Systems Permit No SW8 031206 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 1S HEREBY GRANTED TO Charles Yopp, Coastal Mini Storage Coastal Mini Storage Onslow County FOR THE construction, operation and maintenance of 4 sand filters in compliance with the provisions of 15A NCAC 2H 1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit This permit shall be effective from the date of issuance until September 17, 2014, 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 15 on page 3 of this permit The stormwater controls have been designed to handle the runoff from the built -upon area within the specified drainage area, as per Section 15 of this permit 3 The tract will be limited to the amount of built -upon area indicated in Section 15 of this permit, and per the approved plans 4 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system Page 2 of 8 State Stormwater Management Systems Permit No SW8 031206 5 The following design criteria have been provided in the sand filters and must be maintained at design condition Sand Filter Number 1 2 3 4 a Drainage Area, ft2 74,157 28,725 38,528 64,870 Onsite, ft2 74,157 28,725 38,528 64,870 Offsite, ft2 0 0 0 0 b Total BUA, ft2 64,395 19,939 28,089 50,723 c Design Storm, inches V, 1" 1" 1" d Sand Filter Depth, ft 1 5' 1 5' 1 5' 1 5' e TSS efficiency 85% 85% 85% 85% t� f Filter Bottom, FMSL 41 33 31 25 323 g Filter Area, ft2 1,200 876 840 1,584 h r Sediment Area, ft2 1,200 876 840 1,584 i Srorage Volume, ft3 2,400 1,752 1,680 3,168 j Weir Elevation, FMSL 425 345 3275 338 k Controlling Orifice 4"0 4"0 4"0 4"0 1 Number of Orifices 1 1 1 1 m Receiving Streem/River Basin Everett Creek/White Oak n Stream Index Number 19-32 o Classification of Water Body SA,HQW Page 3 of 8 State Stormwater Management Systems Permit No SW8 031206 11. SCHEDULE,OF COMPLIANCE 1 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 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 4 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 filters d Immediate repair of eroded areas e Maintenance of all slopes in accordance with approved plans and specifications f Debris removal and unclogging of sand filter media, orifice devices, vegetated filters, catch basins and piping g Access to the sand filters must be available at all times 5 Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ The records will indicate the date, activity, name of person performing the work and what actions were taken 6 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 Access to the stormwater facilities shall be maintained via appropriate easements at all times 9 The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below a Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc b Project name change c Transfer of ownership 11 Page 4 of 8 State Stormwater Management Systems Permit No SW8 031206 d Redesign or addition to the approved amount of built -upon area or to the drainage area e Further subdivision, acquisition, lease or sale of all or part of the project area The project area is defined as all property owned by the permrttee, for which Sedimentation and Erosion Control Plan approval or a CAMA Ma,jor permit was sought f Filling in, altering, or piping of any vegetative conveyance shown on the approved plan 10 The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction 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 Director may notify the permrttee 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 permrttee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements The permrttee shall provide copies of revised plans and certification in writing to the Director that the 6hanges have been made III GENERAL CONDITIONS 1 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 permrttee must submit arformal 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 appropriate The approval of this request will be considered on its merits and may or may not be approved The permrttee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request 2 Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215 6A to 143-215 6C 3 The issuance of this permit does not preclude the Permittee from complying with any and`all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having 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, includin6-those as may be required by this Division, such as the construction of additional or replacement stormwater management systems 5 The permrttee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility 6 The permit may be modified, revoked and reissued or terminated for cause The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition t 7 Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual Page 5 of 8 State Stormwater Management Systems Permit No SW8 031206 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 17th day of September, 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 State Stormwater Management Systems Permit No SW8 031206 Coastal Mini Storage Stormwater Permit No SW8 031206 Onslow 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 7 of 8 State Stormwater Management Systems Permit No SW8 031206 Certification Requirements I 1 The drainage area to the system contains approximately the permitted acreage a, 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 Onslow County Building Inspections i Page 8of8 E T, ° ' W , H ' ' �r i , , OFFICE USE ONLY I ,4 , � = , l Jd i Date Received I Fee Paid Permit Number LIZ)v0 $ 4UU-U ) 13 5 b f) 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 I Applicants name (specify the name of the corporation individual, etc who owns the project) 2 Print Owner/Signing Official s name and title (person legally responsible for facility and compliance) 3 Mailing Address for person listed in item 2 above P. o. -6dx 2gK- City Stsf,A�5 FfiE MY _ State t4C_ ZIp_za_q.i6_ Telephone Number TO T- — %6'sk 4 Project Name (subdivision facility, or establishment name - should be consistent with project name on plans, specifications, letters operation and maintenance agreements, etc) -- - 6aA ,mac.. - AA t is1 t_ ST e4s._- .rm 5 Location of Project (street address) ZOT5: AC blllr m4AY )??- City SIJr'&l-2 Fkwy County OA) 51 �6 f+J__ .._. 6 Directions to project (from nearest major intersection) -r,Cr,,, 1My 7 Latitude -3* 3'3/`�- Longitude -f' ZS 3y tJ of protect 8 Contact person who can answer questions about the project Name 6k1A.TAZe--, y0p Telephone Number II PERMIT INFORMATION I Specify whether project is (check one) _A�New Renewal Modification Form SWU-101 Version 3 99 Page] of 4 3 4 � ! 1 ! fi y+ V ,. .d •"x t.. .. h �.1a i �f _' I- ia• �� i t to h ^r+. , �� • .,a1 'y` s tr \ ` � ""� �-^,: y'. , - � � .: w � s ;�.'.h • . i ; i �� �. , :.; i'1 v 1 A i I 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 V"' High Density Redevelop General Permit Other 4 Additional Project Requirements (check applicable blanks) _CAMA Major ✓Sedimentation/Erosion Control 404/401 Permit _NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748 III PROJECT INFORMATION 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 S-fir- ►,,. .�e.- �'�,vs_� i� L� 11 t° �L.a. 1. _r+ r am, r l� lot S 2 Stormwater runoff from this project drains to the IJ L)c, L River basin 3 Total Project Area 5 . Z. 7- acres 4 Project Built Upon Area 5 How many drainage areas does the project have?_5 a 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 Information ' s ' "'' ' Drainage Area 1 Drainage Area 2 Receiving Stream Name -� E' G T C. f Receiving Stream Class S h SA t kQW Drainage Area 7 c1/ S-7� z 7o w, z 7 Z T 0.l06 ac Existing Impervious` Area 0 Z 7- Proposed Impervious*Area L.{ 31 >r i�qR �" 0 Y( 4r, % Impervious' Area (total) 8 (. S . q rllmpervious* Surface Area I Drainage Area 1, 1 Drainage Area 2 On -site Buildings Z 7 6 ( 6. to t!� {# On -site Streets .36 7 S i 6, flq On -site Parking — —, On -site Sidewalks Other on -site Off -site . _.. Total 6 Y 3 i s-' z / c(g Total 11, `} ' 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 4 2 If this application is being submitted as the result of a renewal or modification to an existing permit list the existing permit number and its issue date (if known) 3 Specify the type of project (check one) Low Density High Density Redevelop General Permit Other 4 Additional Project Requirements (check applicable blanks) CAMA Major _Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748 III PROJECT INFORMATION 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 2 Stormwater runoff from this project drains to the River basin 3 Total Project Area acres 4 Project Built Upon Area 5 How many drainage areas does the project have? 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 Receiving Stream Name Cl g Cte. 1' L'r e'P_ L Receiving Stream Class SA, S Drainage Area 3g S Z 5;_ z $ at� c� p z c(p ac Existing Impervious* Area ! 2 7 0 3 50 2 Z 3 Proposed Impervious"Area z g O 6 Sac 56, 7 Z 3; {-L % Impervious* Area (total) 7 Z 9 / dQ G I_ e sous Surfae'eeOWNlager aI WA d f ran Are 2 On -site Buildings fS 7 1 ,F,f-�-- vS-'y On -site Streets f Z� p 44 i 0 D On -site Parking �--. On -site Sidewalks r Other on -site Off -site �-- Total 2 Tr, 0" 4j7L O Total 50 % Z 3 f+L Jmpervlous area is deimed as the built upon area including but not limited to buildings, roads parking areas sidewalks gravel areas, etc Form S'A'U-101 Version 3 99 Page 2 of 4 2 If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3 Specify the type of project (check one) Low Density High Density Redevelop General Permit Other 4 Additional Project Requirements (check applicable blanks) CAMA Major _Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748 III PROJECT INFORMATION 1 In the space provided below summarize how stormwater will be treated Also attach a detailed narrative (one to two pages) describing stormwater management for the project 2 Stormwater runoff from this project drains to the 3 Total Project Area acres 4 Project Built Upon Area 5 How many drainage areas does the project have?, River basin 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 asmiInf6iomation 'e i 5.%ia°t3FtR7k�iNffl€+Ti.IN'f9.,r's1ft'FZ'tcd e� '�Dra�n`age"Areal°�,�.r �l,,E m s sic (:Ei�H�iY�sn. �3BtP F eII�"€iK' 1$ s'B•'§Bs fs B'i' � ' @, r Dr amage'Arear2 fr;ar ��;€ I dFe€i iEBei Palsia.:4i.EH10"F .,8i'R�'d' Rn 7 Y:�fsnCi. Receiving Stream Name U `r r r e Receiving Stream Class Drainage Area $ ' Existing Impervious* Area 0 L 0 a Proposed Impervious*Area 0 t-2- % Impervious` Area (total) p irrapetvxous Surface lir a 3s� i�l3�4 ��ca%ageAea 1a CEP ;� ,€1s``Dr ai nageAreal2,Stl�AT On -site Buildings On -site Streets 0 On -site Parking .-- On-site Sidewalks Other on -site Off -site Total ---- Total 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 4 7 How was the off -site impervious area listed above derived__ IV DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot If lot sizes vary significantly, a table listing each lot number size and the allowable built -upon area for each lot must be provided as an attachment I The following covenants are intended to ensure ongoing compliance with state stormwater management permit number as issued by the Division of Water Quality These covenants may not be changed or deleted without the consent of the State 2 No more than square feet of any lot shall be covered by structures or impervious materials Impervious materials include asphalt, gravel, concrete brick stone slate or similar material but do not Include wood decking or the water surface of swimming pools 3 Swales shall not be filled in piped, or altered except as necessary to provide driveway crossings 4 Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to construction 5 All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control system These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State and that they will be recorded prior to the sale of any lot V SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms Form SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement Form S WU-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 • 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)—�, 6CO • Detailed narrative description of stormwater treatment/management • Two copies of plans and specifications, including - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high water line Dimensioned property/project boundary Location map with named streets or NCSR numbers Original contours proposed contours spot elevations, finished floor elevations - Details of roads drainage features collection systems, and stormwater control measures Wetlands delineated, or a note on plans that none exist Existing drainage (including off -site), drainage easements, pipe sizes runoff calculations Drainage areas delineated - Vegetated buffers (where required) VII AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section Designated agent (individual or Mailing Address 59't 9 O LF-AMMUL Q6L%V E !6! u.trE 103 City State G- zip 03! Phone ( 410 1 3°Z'7� ` fly �'� . Fax - 4161 VIII APPLICANT'S CERTIFICATION i (print or type name of person listed in General Information, item 2) certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project w11 be co i?ucted m conformance with the a roved plans, that the required deed restrictions and protective cov an will be recorded and that the pro ed project complies with the requirements of 15A NCAC 214 1MG�7 / / /% ' Signature Form SWU-101 Version 3 99 Page 4 of 4 Date u•t`1 k�:' ih . � I �P1r �1 .'.� � i '�� �"�S:SM � �•'1 > C '`; 1 ti �� t �� � i _� '��� � ix � ��� 1 ��~ State Stormwater Permit No Applies to System No SAND FILTER OPERATION AND MAINTENANCE PLAN Regular maintenance is essential to the long-term performance and durability of the sandfilter, as it is with all stormwater BMP's Depending on the types of activities occurring within the drainage area, most sand filters will show a decreased capacity for filtration after a few years At least once a year, each filter must be inspected after a 1" design storm event to determine if the filter bed is passing the runoff within 24 hours 2 If the filter is not passing the runoff completely within 24 hours, the first 2"-3" of discolored sand must be removed and replaced with new sand The removed sand must be dewatered and disposed of properly 3 At the same time that maintenance is performed on the sand chamber, the sediment chamber should be pumped and cleaned The removed sediment should be dewatered and disposed of properly 4 At least once every quarter, check that the orifice is clear I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above I agree to notify DWQ of any problems with the system and prior to any changes to the system or the responsible party Print name ai Address Z, Phone Signature Ze p/6D Note The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a res4 ent of the subdivision has been named the president I, V14 1 Y.k. A K 1 U Ct- , a Wary Public for the State of k , C unt of do hereby certify that V S -_.personally appeared before me this the - day of �6 , and acknowledge the due execution of the foregoing sand filter maintenance requirements Witness my hand and official seal, �— SEAL w My commission expires tk—t q-o 1 State Stormwater Permit No Applies to System No SAND FILTER OPERATION AND MAINTENANCE PLAN Regular maintenance is essential to the long-term performance and durability of the sandf lter, as it is with all stormwater BMP's Depending on the types of activities occurring within the drainage area, most sand filters will show a decreased capacity for filtration after a few years At least once a year, each filter must be inspected after a 1" design storm event to determine if the filter bed is passing the runoff within 24 hours 2 If the filter is not passing the runoff completely within 24 hours, the first 2"-3" of discolored sand must be removed and replaced with new sand The removed sand must be dewatered and disposed of properly 3 At the same time that maintenance is performed on the sand chamber, the sediment chamber should be pumped and cleaned The removed sediment should be dewatered and disposed of properly 4 At least once every quarter, check that the orifice is clear 1 acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above I agree to notify DWQ of any problems with the system and prior to�an c/hange/s'to the /system or the responsible party Print name and title Address Zo76- Phone Signature Note The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a�Ilz of the subdivision has been named the president I, .1 Lf-. , a Nptary Public for the State of O � 4\ ra , County of t-<A-M LLgAL.. do hereby certify that eS O personally appeared before me this the day of apQ , and acknowledge the due execution of the foregoing sand filter maintenance requirements Witness my hand and official seal, n��' SEAL My commission expires State Stormwater Permit No \'�, O to Applies to System No SAND FILTER OPERATION AND MAINTENANCE PLAN Regular maintenance is essential to the long-term performance and durability of the sandfilter, as it is with all stormwater BMP's Depending on the types of activities occurring within the drainage area, most sand filters will show a decreased capacity for filtration after a few years At least once a year, each filter must be inspected after a 1" design storm event to determine if the filter bed is passing the runoff within 24 hours 2 If the filter is not passing the runoff completely within 24 hours, the first 2"-3" of discolored sand must be removed and replaced with new sand The removed sand must be dewatered and disposed of properly 3 At the same time that maintenance is performed on the sand chamber, the sediment chamber should be pumped and cleaned The removed sediment should be dewatered and disposed of properly ' 4 At least once every quarter, check that the orifice is clear I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above I agree to notify DWQ of any problems with the system and prior to any changes to the system or the responsible party Print name Address Phone Signature s65f16� Note The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and srdent of the subdivision has been named the president I MR-0 � cc_(,�. P for a f � , a Notary Public o the State o _fl bPAh Cwe_o f►4► , County of I R.W-W;k do hereby certify that Q_)4 eS G © personally appeared before me this the � _day of , and acknowledge the due execution of the foregoing sand filter maintenance requirements Witness my hand and official seal,MA, " ,,, SEAL My commission expires L CAVANAU G H Solutions through integrity and partnership February 26, 2010 Ms Angela Hammers NCDENR — Surface Water Protection 127 Cardinal Drive Extension Wilmington, NC 28405 RE Coastal Mini Storage Stormwater Permit No SW8 031206 Onslow County Dear Ms Hammers, Attached please find the Coastal Mini Storage, Stormwater Permit No SW8 031206 Designer's Certification signed and sealed by William G Simmons, Jr, PE Upon receipt and review of the attached, you have any questions feel free call to Mr Simmons Thank you Very truly yours, CAVANAUGH & ASSOCIATES, P A Bonnie Frasier Administrative Assistant to William G Simmons, Jr Attachment TZECJFHrXED FEB 2 G 2010 BY: State Stormwater Management Systems Permit No SW8 031206 Coastal Mini Storage Stormwater Permit No SW8 031206 Onslow County DESIGNER'S CERTIFICATION I, William G _Simmons, jr, P E , as a duly registered Professional Engineer in the State of North Carolina, have performed a visual inspection of the Coastal Mini Storage High Density Stormwater Management System on a periodic interval since construction of the project, and most recently on February 17, 2010, and have observed that the construction of the project is within substantial conformity of the intent of the approved plans and specifications of the project Signature -04 Registration Number 27407 Date 20 10 CA~Ne S6 �S �? C—� 1273 ) &C CAVANAUGH Salutwns through integrity and partnership February 26, 2010 Ms Angela Hammers NCDENR — Surface Water Protection 127 Cardinal Drive Extension Wilmington, NC 28405 RE: Coastal Mlnl Storage Stormwater Permit No. SW8 031206 Onslow County Dear Ms Hammers, Attached please find the Coastal Mini Storage, Stormwater Permit No SW8 031206 Designer's Certification signed and sealed by William G Simmons, Jr, PE Upon receipt and review of the attached, you have any questions feel free call to Mr Simmons Thank you Very truly yours, CAVANAUGH & ASSOCIATES, P A Bonnie Frasier Administrative Assistant to William G Simmons, Jr Attachment State Stormwater Management Systems Permit No SW8 031206 Coastal Mini Storage Stormwater Permit No SW8 031206 Onslow County DESIGNER'S CERTIFICATION I, William G Simmons. Jr, P E , as a duly registered Professional Engineer in the State of North Carolina, have performed a visual inspection of the Coastal Mini Storage High Density Stormwater Management System on a periodic Interval since construction of the project, and most recently on February 17, 2010, and have observed that the construction of the project Is within substantial conformity of the intent of the approved plans and specifications of the project Signature p aL. — Registration Number 27407 Date