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HomeMy WebLinkAboutSW8051109_CURRENT PERMIT_20051215STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE � CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE j�/�`S YYYYMMDD �QF WATFRQ Michael F Easley, Governor �O G William G Ross Jr , Secretary r-) r North Carolina Department of Environment and Natural Resources Alan W Klimek, P E Director Division of Water Quality December 15, 2005 Mr Archie Cribb, Vice President Branch Banking and Trust Company 306 South Madison Street Whiteville, NC 28472 Subject Stormwater Permit No SW8 051109 BB&T, Cedar Point, NC High Density Project Carteret County Dear Mr Cribb The Wilmington Reggional Office received a complete Stormwater Management Permit Application for BB&T, Cedar Point, NC on November 28, 2005 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 051109 dated December 15, 2005, for the construction of the subject project This permit shall be effective from the date of issuance until December 15, 2015, and shall be subject to the conditions and limitations as specified therein Please pay special attention to the Operation and Maintenance requirements in this permit Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P 0 Drawer 27447, Raleigh, NC 27611-7447 Unless such demands are made this permit shall be final and binding If you have any questions, or need additional information concerning this matter, please contact Paul Bartlett, or me at (910) 796-7215 Sincerely;" G 'C.L�/_ Edward Beck Regional Supervisor Surface Water Protection Section ENBlptb S 1WQSISTORMWATERIPERMIT1051109 dec05 cc Brian Soltz, Commercial Site Design, PLLC Katrina Marshall, Carteret County Building Inspections Paul T Bartlett, P E CWiImmgton Regional -Offices Central Files North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone (910) 796 7215 Customer Servicel 877-623 6748 Wilmington Regional Office Wilmington NC 28405 3845 FAX (910) 350 2004 Internet h2o enr state nc us An Equal OpportunitylA3firmative Action Employer - 50% Recycled110% Post Consumer Paper One N01hCarolina Naiurail; State Stormwater Management Systems Permit No SW8 051109 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 Archie Cribb and Branch Banking and Trust Company BB&T, Cedar Point, NC Carteret County FOR THE construction, operation and maintenance of two infiltration basins in compliance with the provisions of 15A NCAC 2H 1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit This permit shall be effective from the date of issuance until December 15, 2015, and shall be subject to the following specified conditions and limitations I DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data 2 This stormwater system has been approved for the management of stormwater runoff as described in Section 16 on page 3 of this permit The stormwater control has been designed to handle the runoff from 46,708 square feet of total impervious area (Basin #1 — 44,154 sq ft, Basin #2 — 2,554 sq ft) Each basin provides more than twice the required design volume and does not require a bypass 3 The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans There is no allotment for future built -upon area at the site 4 All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements The final plats for the protect will be recorded showing all such required easements, in accordance with the approved plans 5 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system Page 2 of 7 I State Stormwater Management Systems Permit No SW8 051109 6 The following design criteria have been provided in the Infiltration basins and must be maintained at design conditions Basin #1 Basin #2 a Drainage Area, acres 1 14 006 Onsite, ft2 42,202 None Offsite, ft2 7,314 2,554 b Total Impervious Surfaces, ft2 44,154 2,554 Onsite Buildings, ft2 3,995 None Onsite Parking/Asphalt, ft2 31,499 None Onsite Sidewalks, ft2 1,346 None Offsite Access Driveways, ft2 7,314 2,554 c Design Storm, inches 1 5 1 5 d Basin Depth, feet 075 075 e Bottom Elevation, FMSL 2075 220 f Bottom Surface Area, ft2 14,540 1,145 g Bypass Weir Elevation, FMSL NIA NIA (Basin Volume > 2X Design Volume) h Permitted Storage Volume, ft3 10,905 859 i Type of Soil sand sand j Expected Infiltration Rate, inlhr 120 105 k Seasonal High Water Table, 1870 1933 FMSL I Time to Draw Down, hours 1 1 m Receiving Stream/River Basin Boathouse Creek I White Oak River n Stream Index Number 20-31 o Classification of Water Body "SA, HOW" II 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 permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to a Semiannual scheduled inspections (every 6 months) b Sediment removal c Mowing and revegetation of slopes and the vegetated filter d Immediate repair of eroded areas e Maintenance of all slopes in accordance with approved plans and specifications f Debris removal and unclogging of bypass structure, infiltration media, flow spreader, catch basins, piping and vegetated filter g A clear access path to the bypass structure must be available at all times Page 3 of 7 State Stormwater Management Systems Permit No SW8 051109 4 Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ The records will indicate the date, activity, name of person performing the work and what actions were taken 5 The facilities shall be constructed as shown on the approved plans This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data fi 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 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 permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought f Filling in, altering, or piping of any vegetative conveyance shown on the approved plan 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 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 Page 4 of 7 State Stormwater Management Systems Permit No SW8 051109 I119r1:11I'll 14:711w+le7►11]kdIQi!&J This permit is not transferable except after notice to and approval by the Director In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate The approval of this request will be considered on its merits and may or may not be approved The permittee is responsible for compliance with all permit conditions until such time as the 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, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems 5 The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility 6 The permit may be modified, revoked and reissued or terminated for cause The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition 7 Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual 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 15th day of December 2005 NORT Z ROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for AlanKlimek, P E Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No SW8 051109 BB&T, Cedar Point, NC Stormwater Permit No SW8 051109 Carteret County Designer's Certification Page 1 of 2 I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications The checklist of items on page 2 of this form is included in the Certification Noted deviations from approved plans and specification Signature Registration Number Date SEAL Page 6 of 7 S State Stormwater Management Systems Permit No SW8 051109 Page 2 of 2 Certification Requirements 1 The drainage area to the system contains approximately the permitted acreage 2 The drainage area to the system contains no more than the permitted amount of built -upon area 3 All the built -upon area associated with the project is graded such that the runoff drains to the system 4 All roof drains are located such that the runoff is directed into the system 5 The bypass structure weir elevation is per the approved plan 6 The bypass structure is located per the approved plans 7 A Trash Rack is provided on the 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 All required design depths are provided 13 All required parts of the system are provided 14 The required system dimensions are provided per the approved plans cc NCDENR-DWQ Regional Office Katrina Marshall, Carteret County Building Inspections Page 7 of 7 OFFICE USE ONLY Date Received Fee Paid Permit Number fi/2be�#, �Atq,� z State of North Carolina Department of Environment and Natural Resou iMC �+ FVE D Division of Water Quality N0 €1 3 j 05 STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original B� GENERAL INFORMATION 1 Applicants name (specify the name of the corporation individual etc who owns the project) Branch Banking and Trust 2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance) _ Branch Banking and Trust / Archie Cribb, Vice President _ 3 Mailing Address for person listed in item 2 above 306 South Madison Street City Whiteville State NC Zip 28472 Telephone Number ( 910 914-9851 4 Project Name (subdivision, facility or establishment name - should be consistent with project name on plans, specifications letters, operation and maintenance agreements etc) BB&T Cedar Point NC 5 Location of Project (street address) _NW Corner of NC Highway 24 and SR 1113 City Cedar Point County Carteret 6 Directions to project (from nearest major intersection) NW Corner of NC Highway 24 and SR 1113 In Cedar Point, NC _ 7 Latitude 34411 Longitude 77 4' 2l" W 8 Contact person who can answer questions about the project Name Brian Soltz II PERMIT INFORMATION 1 Specify whether project is (check one) X New Form SWU-I01 Version 3 99 Page 1 of 4 Telephone Number ( 919 ) 848-6121 Renewal Modification it- 14, of project , , 0/-;-9/0J-m- A'e0'(AV/d'7 2 If this application is being submitted as the result of a renewal or modification to an existing permit list the existing permit number and its issue date (if known) 3 Specify the type of project (check one) Low Density X High Density Redevelop Ceneral 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 Stormwater will be routed into an infiltration basin Stormwater from the first 1 5" of rainfall will infiltrate into the soil Excess stormwater will enter overflow inlet and discharge piping 2 Stormwater runoff from this project drains to the _White Oak River basin 3 Total Project Area 2 18 acres 4 Project Built Upon Area 41 5 How many drainage areas does the project have? 2 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 Drainage Area 1 I Drainage Area 2 Receiving Stream Name Boathouse Creek Boathouse Creek Receiving Stream Class SA SA Drainage Area 49,516 sf (1 14 ac) 2,554 sf (0 06 ac) Existing Impervious* Area 0 0 Proposed Impervious*Area 44,154 sf (1 01 ac) 2,554 sf (0 06 ac) % Impervious* Area (total) 89 2% 100% Impervious' Surface Area, Drainage Area lE Drainage Area 2 On -site Buildings 3,995 sf (0 09 ac) 0 On -site Streets 0 0 On -site Parking 31,499 sf (0 72 ac) 0 On -site Sidewalks 1,346 sf (0 03 ac) 0 Other on -site 0 0 Off -site (access driveway) 7,314 sf (0 17 ac) 2,554 sf (0 06 ae) Total 44,154 sf (1 01 ac) Total 2,554 sf (0 06 ac) SEE A`I FACHED SHEET FOR ADDITIONAL DRAINAGE AREAS * 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? None off -site 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 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 I Please indicate that you have provided the following required information by initialing in the space provided next to each item Initials • Original and one copy of the Stormwater Management Permit Application Form B$ • One copy of the applicable Supplement Form(s) for each BMP 35 • Permit application processing fee of $420 (payable to NCDENR) .S • Detailed narrative description of stormwater treatment/management is • Two copies of plans and specifications including QS T - Development/Project name - Engineer and firm -Legend - North arrow Scale Revision number & date Mean high water line Dimensioned property/project boundary Location map with named streets or NCSR numbers Original contours proposed contours spot elevations finished floor elevations Details of roads drainage features collection systems and stormwater control measures Wetlands delineated or a note on plans that none exist Existing drainage (including off -site), drainage easements pipe sizes runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VII AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf please complete this section Designated agent (individual or firm) Mailing Address 7S0 Ci city Ra�ei9h Phone ( 4 19 )'94 t - 6121 VIII APPLICANT'S CERTIFICATION ' a/ S57�0 VeSI vi �-e 10 P«C- State NC- zip 27613 Fax ( q19 ) Sgr`3741 I (print or type name of person listed in General Information item 2) ?. Z * l L. 11 r.� . , op certify that the information included on this permit application form is, to the bestfof my knowledge correct and that the project will be constructed in conformance with the approved plans that the required deed restrictions and protective covenants will be recorded and that the proposed project complies with the requirements of 15A NCAC 2H 1000 _ %-- Signature Form SWU-101 Version 3 99 Page 4 of 4 Date /3 41 Permit No 4486A/Il Uf (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater Management Plan Review A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details I. PROJECT INFORMATION Project Name BB&T, Cedar Point, NC Contact Person Archie Cribb Phone Number ( 336 ) 703-5705 This worksheet applies to Basin No 1 in Drainage Area 1 (as identified on plans) (from Form SWU 101) II. DESIGN INFORMATION - Attach supporting calculations/documentation The soils report must be based upon an actual field investigation and soil borings County soil maps are not an acceptable source of soils information All elevations shall be in feet mean sea level (fmsl) Soils Report Summary Soil Type sand/silIX sand Infiltration Rate 12 PmsI r cflhr/sf (circle appropriate units) SHWT Elevation 1870 (Seasonal High Water Table elevation) Basin Design Parameters Design Storm 1 5 inch (1 5 inch event for Sit waters, 1 inch event for others) Design Volume 5,277 c f Drawdown Time < 1 days Basin Dimensions Basin Size (irregular shape) NA ft x NA ft = 14,540 sq ft (bottom dimensions) Basin Volume Provided 10,905 c f ( -X) Basin Elevations Bottom Elevation Storage Elevation Top Elevation 2075 fmsl 21 50 fmsl 21 50 fmsl Form SWU-103 Rev 3 99 Page t of 3 III REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N C Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section 15 A NCAC 2H 1008 Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below Attach justification if a requirement has not been met Applicants Initials BS a System is located 50 feet from class SA waters and 30 feet from other surface waters BS b System is located at least 100 feet from water supply wells BS c Bottom of system is at least 2 feet above the seasonal high water table BS d Bottom of the system is 3 feet above any bedrock or impervious soil horizon BS a System is not sited on or in fill material or DWQ approval has been obtained NA f System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way BS g Drainage area for the device is less than 5 acres BS h Soils have a minimum hydraulic conductivity of 0 52 inches per hour and soils report is attached BS i System captures and infiltrates the runoff from the first 1 0 inch of rainfall (1 5 inch event for areas draining to SA waters ) Design volume and infiltration calculations attached BS j System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage Calculations attached BS k All side slopes stabilized with vegetated cover are no steeper than 3 1 (H V) NA I A pretreatment device such as a catch basin, grease trap, filter step, grassed swale or sediment trap is provided BS m Bottom of the device is covered with a Iayer of clean sand to an average depth of 4 inches or dense vegetative cover is provided BS n Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters) BS o Flow distribution mechanism within the basin is provided NA p A benchmark is provided to determine the sediment accumulation in the pretreatment device NA q Runoff in excess of the design volume bypasses off-line systems (bypass detail provided) BS r System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days A soils report and all pertinent draw -down calculations are attached BS s Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the protect is complete and the entire drainage area is stabilized Fonn SWU-103 Rev 3 99 Page 2 of 3 IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT I After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition 2 Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed 3 After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration Remove any blockage and repair the structure to approved design specifications 4 Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth The system shall be restored to the original design depth without over -excavating Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i a stockpiling near a stormwater treatment device or stream, etc ) A benchmark shall be established in the pretreatment unit The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments When the design depth reads _NR feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiitration basin 5 If the Division determines that the system is failing, the system will immediately be repaired to original design specifications If the system cannot be repaired to perform its design function, other stoimwater control devices as allowed by NCAC 2H 1000 must be designed, approved and constructed I acknowledge and agree by my signature below that I am responsible for the performance of the five maintenance procedures listed above I agree to notify DWQ of any problems with the system or pnor to any changes to the system or responsible party Print Name and Title A, Address 36 6 S ( 7 Z Phone _�I_ 1.0 Signature Date /- 0C_-i')14" _ns' 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 subd ton has been named the president //11� a Not ry Public for the State /of _ 56�& unty ofe�Gay� 4_ _ do hereby certify that & l _ _personally appeared before me this day of 93005' and acknowledge the due execution of the forgoing infiltration basin maintenance requirements Witness my hand and official seal, flq SEAL m'p�A�� My commission expires_ � pUBL�Cr G; im hgru.nN Form SWU-103 Rev 3 99 Page 3 of 3 �, �� �O Permit No S U v (to be provided by D Q) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater Management Plan Review A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details I PROJECT INFORMATION Project Name BB&T, Cedar Point, NC R Contact Person Archie Cribb Phone Number ( 336 ) 703-5705 This worksheet applies to Basin No 2 in Drainage Area 2 (as identified on plans) (from Form SWU-t 01) II DESIGN INFORMATION - Attach supporting calculations/documentation The soils report must be based upon an actual field investigation and soil bonngs County soil maps are not an acceptable source of soils information All elevations shall be in feet mean sea level (fmsl) Soils Report Summary Soil Type sand/sift, sand Infiltration Rate 105 in/hr r cf/hr/sf (circle appropriate units) SHWT Elevation 1933 sl (Seasonal High Water Table elevation) Basin Design Parameters Design Storm 1 5 inch (1 5 inch event for SA waters, I inch event for others) Design Volume 310 c f Drawdown Time < 1 days Basin Dimensions Basin Size (irregular shape) NA ft x NA ft = 1,145 sa ft (bottom dimensions) Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation 859 c f 2200 fmsl 2275 fmsl 2275 finsl Form SWU-103 Rev 3 99 Page 1 of 3 III. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N C Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section 15 A NCAC 2H 1008 Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below Attach justification if a requirement has not been met. Applicants Initials BS a System is located 50 feet from class SA waters and 30 feet from other surface waters BS b System is located at least 100 feet from water supply wells BS c Bottom of system is at least 2 feet above the seasonal high water table BS d Bottom of the system is 3 feet above any bedrock or impervious soil horizon BS a System is not sited on or in fill material or DWQ approval has been obtained NA f System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way BS g Drainage area for the device is less than 5 acres BS h Soils have a minimum hydraulic conductivity of 0 52 inches per hour and soils report is attached BS i System captures and infiltrates the runoff from the first 10 inch of rainfall (1 5 inch event for areas draining to SA waters ) Design volume and infiltration calculations attached BS J System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage Calculations attached BS k All side slopes stabilized with vegetated cover are no steeper than 3 1 (H V) NA 1 A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided BS in Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided BS n Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters) BS o Flow distribution mechanism within the basin is provided NA p A benchmark is provided to determine the sediment accumulation in the pretreatment device NA q Runoff in excess of the design volume bypasses off-Ime systems (bypass detail provided) BS r System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days A soils report and all pertinent draw -down calculations are attached BS s Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized Form S WU- E 03 Rev 3 99 Page 2 of 3 IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1 After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition 2 Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed 3 After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration Remove any blockage and repair the structure to approved design specifications 4 Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth The system shall be restored to the original design depth without over -excavating Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i e stockpiling near a stormwater treatment device or stream, etc ) A benchmark shall be established in the pretreatment unit The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments When the design depth reads N 1 A feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5 If the Division determines that the system is failing, the system will immediately be repaired to original design specifications If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H 1000 must be designed, approved and constructed I acknowledge and agree by my signature below that I am responsible for the performance of the five maintenance procedures listed above I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party Print Name and Title A ' �:L•_ e 'D ? Address 3 O(. S yy"-W--d i S i5+,�- L!i1,, -A4- o 1 l L �P—i_ 0_C Z,.4� 7 L Phone `— f t)- Signature Date o r nio Note The legally responsible party should not be a homeowners association unless more than SD% of the lots have been sold and a resident of the subd ton has been named the president , a No ry Public for the State off / county do hereby certify that personally appeared before me this day of "jD05­-, and acknowledge the due execution of the forgoing infiltration basin maintenance requirements Witness my hand and official seal, � /� L _ /J SEAL rm° LCrra�? My commission expires_3,�,��� sq L.1c. a Form SWU-lo3 Rev 3 99 Page 3 of 3 State Stormwater Management Systems Permit No SW8 051109 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 Archie Cribb and Branch Banking and Trust Company BB&T, Cedar Point, NC Carteret County FOR THE construction, operation and maintenance of two infiltration basins in compliance with the provisions of 15A NCAC 2H 1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit This permit shall be effective from the date of issuance until December 15, 2015, and shall be subject to the following specified conditions and limitations I DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data 2 This stormwater system has been approved for the management of stormwater runoff as described in Section 16 on page 3 of this permit The stormwater control has been designed to handle the runoff from 46,708 square feet of total impervious area (Basin #1 — 44,154 sq ft, Basin #2 — 2,554 sq ft) Each basin provides more than twice the required design volume and does not require a bypass 3 The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans There is no allotment for future butlt-upon area at the site 4 All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans 5 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system Page 2 of 7 State Stormwater Management Systems Permit No SW8 051109 6 The following design criteria have been provided in the infiltration basins and must be maintained at design conditions Basin #1 Basin #2 a Drainage Area, acres 1 14 006 Onsite, ft2 42,202 None Offsite, ft2 7,314 2,554 b Total Impervious Surfaces, ft2 44,154 2,554 Onsite Buildings, ft2 3,995 None Onsite Parking/Asphalt, ft2 31,499 None Onsite Sidewalks, ft2 1,346 None Offsite Access Driveways, ft2 7,314 2,554 c Design Storm, inches 1 5 1 5 d Bann Depth, feet 075 075 e Bottom Elevation, FMSL- 2075 220 f Bottom Surface Area, ft2 14,540 1,145 g Bypass Weir Elevation, FMSL NIA NIA (Bann Volume > 2X Design Volume) h Permitted Storage Volume, ft3 10,905 859 i Type of Soil sand sand i Expected Infiltration Rate, in/hr 120 105 k Seasonal High Water Table, 1870 1933 FMSL I Time to Draw Down, hours 1 1 m Receiving Stream/River Basin Boathouse Creek / White Oak River n Stream Index Number 20-31 o Classification of Water Body "SA, HQW" II SCHEDULE OF COMPLIANCE 1 The stormwater management system shall be constructed to its entirety, vegetated and operational for its Intended use prior to the construction of any built -upon surface 2 During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately 3 The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to a Semiannual scheduled inspections (every 6 months) b Sediment removal c Mowing and revegetation of slopes and the vegetated filter d Immediate repair of eroded areas e Maintenance of all slopes in accordance with approved plans and specifications f Debris removal and unclogging of bypass structure, infiltration media, flow spreader, catch basins, piping and vegetated filter g A clear access path to the bypass structure must be available at all times Page 3 of 7 State Stormwater Management Systems Permit No SW8 051109 4 Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ The records will indicate the date, activity, name of person performing the work and what actions were taken 5 The facilities shall be constructed as shown on the approved plans This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data 6 Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation Any deviations from the approved plans and specifications must be noted on the Certification A modification may be required for those deviations 7 If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility 8 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 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 permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought f Filling in, altering, or piping of any vegetative conveyance shown on the approved plan 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 maynotify 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 Page 4 of 7 State Stormwater Management Systems Permit No SW8 051109 III GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate The approval of this request will be considered on its merits and may or may not be approved The permittee is responsible for compliance with all permit conditions until such time as the 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, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems 5 The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility 6 The permit may be modified, revoked and reissued or terminated for cause The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition 7 Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual 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 15th day of December 2005 NO fAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION "4' I � � G, � 7, � for Ian W Klimek, P E , Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No SW8 051109 BB&T, Cedar Point, NC Stormwater Permit No SW8 051109 Carteret County Designer's Certification Page 1 of 2 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, (Project) 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 6 of 7 State Stormwater Management Systems Permit No SW8 051109 Page 2 of 2 Certification Requirements .1 The drainage area to the system contains approximately the permitted acreage 2 The drainage area to the system contains no more than the permitted amount of built -upon area 3 All the built -upon area associated with the project is graded such that the runoff drains to the system 4 All roof drains are located such that the runoff is directed into the system 5 The bypass structure weir elevation is per the approved plan 6 The bypass structure is located per the approved plans 7 A Trash Rack is provided on the 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 All required design depths are provided 13 All required parts of the system are provided 14 The required system dimensions are provided per the approved plans cc NCDENR-DWQ Regional Office Katrina Marshall, Carteret County Building Inspections Page 7 of 7