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HomeMy WebLinkAboutSW7080710_CURRENT PERMIT_20080729STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW �DOy7ly DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE .2&Sfd 7;19 YYYYM M D D Michael F. Easley, Governor �\W `sn William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins, Director Division of Water Quality Mr. G. Michael Morton Morton-Crayton Ventures, LLC P.O. Drawer 12346 New Bern, NC 28561 Subject: Stormwater Permit No. SW7080710 Sound of Freedom Shoppes High Density Project Craven County Dear Mr. Morton: The Washington Regional Office received a complete Stormwater Management Permit Application for Sound of Freedom Shoppes on July 18, 2008. 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. SW7080710 dated July 29, 2008, for the construction of the subject project. This permit shall be effective from the date of issuance until July 29, 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 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, 6714 Mail Service Center, Raleigh, NC 27699-6714. 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 Samir Dumpor, or me at (252) 946-6481. SinIceZel, A Regional Supervisor Surface Water Protection Section AH/sv: S:\WQS\STORMWATER\PERMITS\SW7080710 cc: Joe Avolis, PE, Avolis Engineering, P.A. Oven County Building Inspections ✓Washington Regional Office Central Files North Carolina Division of Water Quality Internee. www.newutcrauxl'ay.ore One 943 Washington Square Mall phone (252) 946-6481 NorthCarojina Washington, NC 27889 Fax (252) 946-9215 Naturally An Equal OpportunitylAKrmative Action Employer— 50% Recycled/l0% Post Consumer Paper State Stormwater Management Systems Permit No. SW7080710 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 Morton-Crayton Ventures, LLC Sound of Freedom Shoppes Craven County FOR THE construction, operation and maintenance of Wet Detention Pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "storm water 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. In addition to a Wet Detention Pond a Bioretention Cell is used to meet the local nutrients removal requirement and as such will be permitted through the local government. The Operation and Maintenance agreement for said Bioretention Cell is a part of this submittal. This permit shall be effective from the date of issuance until July 29, 2018, 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. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 77,746 square feet of impervious area. This pond must be operated with a vegetated filter. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 4. All stormwater collection and treatment systems must be located in either Page 2 of 8 State Stormwater Management Systems Permit No. SW7080710 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. 6. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, acres: 119,682 b. Total Impervious Surfaces, ft2: 77,746 C. Pond Depth, feet: 6.5 d. TSS removal efficiency: 90% e. Permanent Pool Elevation, FMSL: 48.50 f. Required Permanent Pool Surface Area, ft2: 6,031 g. Provided Permanent Pool Surface Area, ft2: 6,765 h. Permanent Pool Volume, ft3: 22,327 i. Temporary Storage Elevation, FMSL: 49.25 j. Required Storage Volume, ft3: 6,309 k. Provided Storage Volume, ft3: 6,309 I. Controlling Orifice: 1 3/8"0 pipe M. Receiving Stream/River Basin: Cedar Creek / Neuse River Basin n. Stream Index Number: 27-112-3 o. Classification of Water Body: "SC; Sw, NSW" 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 stci-rmwater 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: Page 3 of 8 State Stormwater Management Systems Permit No. SW7080710 a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. No decorative spray fountains will be allowed in this stormwater treatment system. 6. 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. 7. 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. 8. 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. 9. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 10. 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. -- -- - -- 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. Page 4 of 8 State r Management Systems Permit No. SW7080710 12. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 13. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a 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. 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. 10— This-permit-shall-be-effective-from-the-date-of-issuance-until-July-29,-2018 ---- - - - Application for permit renewal shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by.the processing fee. Page 5 of 8 State Stormwater Management Systems Permit No. SW7080710 Permit issued this the 29th day of July, 2008. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Coleen H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Stormwater Permit No. SW7080710 Page 6 of 8 State Stormwater Management Systems Permit No. SW7080710 Sound of Freedom Shoppes Stormwater Permit No. SW7080710 Craven Countv Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form 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. SW7080710 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 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 Washington Regional Office Craven County Building Inspections Page 8 of 8 STORMWATER SUBMITTAL REQUIREMENTS WET DETENTION POND Objective ti A. v Collect all runoff from all BUA (proposed and/or existing and/or offsite) as the case may be, by any means including piping or swales, and direct it to the pond. B. Check the proposed pond design to make sure it meets or exceeds the minimum design criteria for surface area, volume and drawdown. What/makes up a complete wet detention pond application package? A. V Two sets of sealed, signed & dated layout & grading plans with appropriate details. (Additional sets of plans may be requested for projects in certain counties) B. V'Completed application with supplement(s), SWU-101, SW401-Wet Pond, and inspection and maintenance agreements. C. Deed restriction document, if applicable (for subdivisions & projects with out parcels) D.�Sealed, signed & dated calculations. E. VEstimated seasonal high water table elevation at all pond locations. F. Chlorides test results must be provided if the project is within Ys mile of SR waters (Phase 11). (This is only required to test out of SR water treatment requirements) III. BIMS entry (for DWQ use only) Enter & track application acknowledged date, review date, add info requested/received dates, permit issue dates, and drainage area info. Best done after the add info letter is written and before sending permit up for signature. IV. Shell documents (for DWQ use only) Permit shells: s:\wqs\stormwater\shells\highcompond s:\wqs\stormwater\shells\highsubpond s:\wqs\stormwater\shelis\HDhybrid Spreadsheet: s:\wqs\stormwater\excel spreadsheets\pond VI. Review Procedure A. APPLICATION 1.V An original signature is required. Photocopied signatures cannot be accepted. 2. ✓A completed wet detention pond supplement and a signed, dated and notarized wet detention pond Inspection and Maintenance Agreement with an original signature. ? 3. The numbers on the supplement match up to the numbers used in the calculations and shown on the plan details. 4. Built -upon areas are reported in square feet in Section 111.6. ? 5. Receiving stream name and classification. This is important because in the non -Phase II counties, a wet pond cannot be used on a project that is within Yz mile of and draining 6.�to SA waters. For Phase 11, a wet pond is allowed within Yz mile of SA waters. Section 111.6 is filled in -cannot be left blank. One column must be filled in for each proposed wet pond. If the applicant is a corporation, partnership or LLC, look it up on the Secretary of State Corporations Database. Make sure corporation is spelled correctly (capitalization and punctuation matter) and that the person signing the application is at least a vice- president in the corporation, a ,General Partner in the partnership, a member in a member -managed LLC, or the manager of a manager -managed LLC. Need documentation to support if the Articles of Incorporation do not list the members or managers of the LLC. If an agent signs, then a letter of authorization is needed from the / president, vice president, general partner, member or manager. 8. \/ For subdivided projects, a signed and notarized deed restriction statement must be provided. Wet Detention Pond, cont. CALCULATIONS 1. (/The orifice is sized based on drawing down the calculated minimum volume in 2-5 days. The average head to use in the orifice equation is approximately one-third of the distance between the permanent pool elevation (PPE) and the elevation of the next available outlet above the permanent pool. The elevation of the next available outlet must be either the elevation where the minimum volume is provided, or it can be higher. The temporary pool elevation (TPE) to report on the supplement will be the elevation of the next available outlet above the PPE. The temporary pool volume (TPV) to report on the supplement is the volume between the specified PPE and the TPE. 2. For Phase 11 projects that are within '/z mile of and draining to SR waters, the difference in runoff from the predevelopment and post -development conditions for the 1 year 24 hour storm must be controlled and treated. 3.��/ _For Phase 11 projects, the discharge rate leaving the pond can be no more than the pre -development discharge rate for the 1 year 24 hour storm. 4.9/A-For Phase II projects draining to SA water, no discharge to surface waters may occur from wet ponds. The discharge leaving the orifice must be effectively infiltrated prior to /reaching surface waters. 5. V The average pond depth is the permanent pool volume divided by the permanent pool surface area. The result must be between 3 ft. and 7.5 ft. Parts of the pond can be deeper than 7.5 ft., but in no case can any part of the pond be less than 3 ft deep. 6. t/ If the 85% TSS_chart is used a 30' vegetated filter must be provided at the outlet of the pond. If th0 90%TiSS chart is used, no filter is required. 7. ✓Use the cor er cf SA/DA TSS chart from the BMP Manual noting that there are different charts for different areas of the State. 8. equired surface area at permanent pool. 1 Provided surface area at permanent pool (Based on pond dimensions) 0.�Required volume calculation based on 1.5" storm for Phase II projects* and 1"storm for all others projects. *unless the project is Phase II and within '/z mile of and draining to SR waters then the volume calculation must be based on difference between the pre and post development conditions for the 1-yr 24-hr storm. 11.VTable of elevations, areas, incremental volumes and accumulated volumes for overall pond and for forebay, to verify volumes provided. 12. Forebay designed to hold 20% of the permanent pool volume. (Range of 18%-22% OK.) 14!4Non-erosive flow for 10 yr. storm in the vegetated filter, if using 85% TSS. 14.�The seasonal high water table must be at or below the proposed permanent pool elevation to assure that the necessary volume will be available above the permanent pbol. 15 ✓Rounding numbers off during the calculation process can result in deficiencies. Do not round the numbers until you get to the final result. 161_*'An additional one foot must be excavated below the bottom elevation of the pond. The 1 foot sediment accumulation depth is not included in the average depth calculation. Wet Detention Pond, cont. C. PLANS- Due to storage space constraints, plan sheets should be kept to a minimum. For small commercial single wet pond projects, the plan set could consist of only 2 or 3 sheets, layout„grading and details. For larger projects, show as much information as possible on as few Keets as possible, without cluttering them up. 1. V� Development/Project Name 2. ✓Engineer name and firm. 3. ✓/L'egend 4. North Arrow y 5. Location Map with nearest intersection of two major roads shown. Major road is any 1, 2, or 3 digit NC, US or interstate highway. 6. V Scale- standard engineering scale, no off-the-wall stuff. 7. Date 8. VIRevision number and date, if applicable. 9. iv/Original contours, proposed contours, spot elevations, finished floor elevations, pipe inverts, swale inverts, etc. 10.✓Existing drainage (piping, swales, ditches, ponds, etc.), including off -site. Include a map delineating the offsite drainage areas. 11.✓Property/Project boundary lines, bearing & distances. 12can High Water Line or Normal High Water Line, if applicable. 13. ✓The permanent pool elevation must be above the SHWT and above the lowest elevation of adjacent wetlands. Evaluate the need for a liner and/or berm/slurry wall to prevent dewatering the wetland. 14 NpDrainage easement widths, pipe sizes and swale inverts are provided. 15.p✓Wetlands delineated, or a note on the plans that none exist. Get a copy of the wetlands delineation map signed by the Corps of Engineers, or have the applicant include a copy of the unsigned delineation map submitted to the Corps. Wet ponds may not be located in wetlands unless a permit to fill those wetlands has been obtained. 16.VDetails for the roads, parking, cul-de-sacs, including sidewalk width, radii, dimensions & slopes. 1 7W. slopes. / Condo development- Provide a typical building footprint with dimensions and note all concrete and wood deck areas. 18. The drainage area for each wet pond is clearly delineated and numbered to match up to the calculations and supplement. Drainage area delineation is best done as a separate plan sheet. 19VA pond section detail to include the forebay, a 10 foot wide vegetated shelf, pertinent elevations for the bottom, permanent pool, temporary pool, and SHWT, 3:1 slopes above the permanent pool, and the weir elevation between the main pond and the forebay. 20 ✓The 10 vegetated shelf extends 6" below and 6" above the permanent pool elevation. 21.V/An outlet structure detail showing a trash rack with <_6" square openings, the necessary orifice invert elevation (i.e., the permanent pool), orifice size and temporary pool /elevation. 22Y Dimensions for each line and arc formed by the permanent pool contour. 2V/PWhere the 85% TSS chart was used, a 30 ft. vegetated filter strip is required to be shown on the plans & detailed (elevations, inverts, slopes, and flow spreader mechanism). Please note that the filter strip is not a ditch. 24.V,� forebay is provided for each inlet and located so as to prevent short-circuiting. 25.VThe pond must have a minimum 1.5:1 length to width ratio and a minimum 3:1 flow path length. Artificial 'baffles" of timber, vinyl, or earth can be used to create a longer flow path. The top elevation of the baffle should be set at the temporary pool elevation or higher. 26KA Vegetation plan is specified for the pond, including slopes. Wetlands species are listed for planting on the 10:1 shelf. Weeping Love Grass is not suitable as a permanent vegetated cover for pond slopes. 271� All roof drainage must be directed to the pond. Show the roof drain collection lines on the plan. This is necessary for projects where the buildings back up the property lines where roof drainage may leave the site prior to going through the pond. Wo CoR� DWQ USE ONLY Date Received Fee Paid Permit Number -7 — W- v5r 1a1 5Wlo D p C-KI& C3T $T State of North Carolina "hL• ,�: ° I 'c • Department of Environment and Natural Resources Division of Water Quality JUL 18 2008 STORMWATER MANAGEMENT PERMIT APPLICATION FORM rrt F q� This form may be photocopied for use as an original 1- c. I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): Morton-Crayton Ventures, LLC 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): G. Michael Morton Member/Manager 3. Mailing Address for person listed in item 2 above: P.O. Drawer 12346 City: State:NC Zip:28561 Phone: (252 ) 633-3068 Fax: (252 ) 633-1822 Em,,iil:mortoncommercial@earthlink.net 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Sound of Freedom Shoppes 5. Location of Project (street address): U.S. 70 West Service Road City:Havelock County:Craven Zip:28532 6. Directions to project (from nearest major intersection): U.S. 70 East into Havelock, make right "U" turn at Greenfield Heights Boulevard (SR 1746), go 300 yards on 7. Latitude:34' 54' 41" N Longitude:76' 56' 21" W of project 8. Contact person who can answer questions about the Name:loscph C. Avolis, P.E. Emait:avoliseng@lpmontine.net II. PERMIT INFORMATION: 1. Specify whether project is (check one): ®New Form SWU-101 Version 03.27.08 Pag Dwoloomen: • Pe Devellopinenl CRAYTON COMMERCIAL 3300 Center Acenuc Suite One WALT CRAYTON Neu" Bern, NC 28562 OfGcc 252.617-4000 Mubilc 252-670-4503 Fnxr25L637-4043 �c:dt©craytunnndamyany.cum _� .�, � J� !j � . r�� !� l 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) N/A 3. Specify the type of project (check one): ❑Low Density ®1-ligh Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑LAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ❑NPDES Stormwater 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. Roof runoff pretreated in a bio-retention area prior to discharge into the wet pond due to nutirent requirements Wet pond treats rest of site to 90%TSS 2. Stormwater runoff from this project drains to the Neuse River basin. 3. Total Property Area: 2.72 acres 4. Total Wetlands Area: 0 acres 5. 100' Wide Strip of Wetland Area: 0 acres (not applicable if no wetlands exist on site) 6. Total Project Area**: 2.75 acres 7. Project Built Upon Area: 64.7 % 8. How many drainage areas does the project have? 1 9. 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. For hieh densitv oroiects, complete the table with one drainage area for each engineered stormwater device. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Cedar Creek Stream Class & Index No. SC; Sw, NSW #27-112-3 Total Drainage Area (sf) 119,682 SF On -site Drainage Area (sf) 118,483 SF Off -site Drainage Area (sf) 1,199 SF Existing Impervious* Area (so 0 SF Proposed Impervious*Area (sf) 77,746 SF % Impervious* Area (total) 647% Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (sf) 21,200 SF On -site Streets (sf) 0 SF On -site Parking (sf) 51,796 SF On -site Sidewalks (so 2,251 SF Other on -site (sf) 1,300 SF (Dumpsters, Natural Gas) Off -site (sf) 1,199 Total (so: 77,746 SF * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. **Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. This is the area used to calculate percent project built upon area (BUA). Form SWU-101 Version 03.27.08 Page 2 of 4 10. How was the off -site impervious area listed above derived? Field visit and topographic survey IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following 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. Forms can be downloaded from http://h2o.enr.state,nc.us/su/bmp forms.htm - deed restrictions. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required in the above form, 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. Forms can be downloaded from ham://1)2o.enr.state.nc.us/su/bmp forms.hhn. Form SW401-Low Density Form SW401-Curb Outlet System Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-Infiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cell Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401-Sand Filter Form SW401-Permeable Pavement Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bioretention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Welland Supplement Grassed Swale Supplement Sand Filter Supplement Permeable Pavement Supplement Form SWU-101 Version 03.27.08 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 Office. (Appropriate office may be found by locating project on the interactive online map at http://h2o.enr.state.nc.us/su/msi maps.htm) 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 � • Original and one copy of the Deed Restrictions & Protective Covenants Form (if/& required as per Part IV above) • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP • Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD) ae payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management 4"A • Copy of any applicable soils report • Two copies of plans and specifications (sealed, signed &dated), 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. (ex. designing engineer or firm) Designated agent (individual or firm): Avolis Engineering, P.A. Mailing Add Phone: (252 ) 633-0068 Email: avolisenoll2monl_ ine.net VIII. APPLICANT'S CERTIFICATION State: NC Zip: 28561 Fax: (252 ) 633-6507 1, (print or type name of person listed in General Information, item 2) G. Michael Morton certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A NCAC 2H .1000. Signature: \-/ L`"M ✓ V V'\ ( Date: t 1 d Form SWU-101 Version 03.27.08 Page 4 of 4 Permit No. (to be provided by DWQ) ®�� o=gyp WAIF,9QG y 9 NCDENR 0 1 STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information. Project name Contact person Phone number Date Drainage area number 252.63NO68 17Jul-08 Sound of Freedom Shop{ Joseph C. Avolis, P.E. II.^ DES IGN'INFORMATIONs�S...:rri"'a,•,s�%'r;.,"r`M.`�,91.w"Ex.',`:Esc:.:'er�i.:t'=a`"a;'sipv"i'sy,?:t.:�3sr?:.$..;';,'.i'i4..an',W'N�t�'4?<r+.. Y j. Site Characteristics Drainage area 119,682.00 ftz Impervious area 77,746.00 f? % impervious 6Z.7 % Design rainfall depth 1.00 in Storage Volume: Non -SR Waters Minimum volume required 6,309.00 ft' Volume provided 6,309.00 ft' Storage Volume: SR Waters 1-yr, 24-hr runoff depth NIA in Pre -development 1-yr, 24-hr runoff ft3 Post -development 1-yr, 24-hr runoff ft3 Minimum volume required Its Volume provided ft3 Peak Flow Calculations 1-yr, 24-hr rainfall depth 3.90 In Rational C, pre -development 0.17 (unitless) Rational C, post -development 0.69 (unitless) Rainfall intensity: 1-yr, 24-hr storm 0.16 in/hr Pre -development 1-yr, 24-hr peak flow 5.72 ft'/sec Post -development 1-yr, 24-hr peak flow 9.10 ft3lsec Pre/Post 1-yr, 24-hr peak flow control �2- g2j$2 ft/sec Basin Elevations Basin bottom elevation 41.00 It Sediment cleanout elevation 42.00 ft Bottom of shelf elevation 48.00 ft Permanent pool elevation 46.50 ft SHWT elevation 48.00 It Top of shelf elevation 49.00 It Temporary pool elevation 49.25 If Form SW401-Wet Detention Basin-Rev.4 Parts I. 811. Design Summary, Pagel of 2 Permit (to be provided by DWQ) Volume and Surface Area Calculations SA/DAratio 5.047 (unitless) Surface area at the bottom of shelf 4,869.00 ft' Volume at the bottom of shelf 17,458.00 ft' Permanent pool, surface area required 6,031.00 ft' Permanent pool, surface area provided 6,765.00 ft' OK Permanent pool volume 22,327.00 ft' Average depth for SA/DA tables 4 - 59 ft OK Surface area at the top of shelf 8,861.00 ft' Volume at the top of shelf 26,233.00 ft' Forebay volume 3,723.00ft' Forebay %of permanent pool volume _ T�.6 % Must be approx. 20%, Adjust pond dimensions Temporary pool, surface area provided 9,200.00 f? Drawdown Calculations Treatment volume drawdown time 3.00 days OK Treatment volume discharge rate 0.0243 ft'/s Pre -development 1-yr, 24-hr discharge 5.72 ft'/s OK Post -development 1-yr, 24-hr discharge 2.82 ft'Is OK Additional Information Diameter of orifice 1 318 in Design TSS removal 90 % Basin side slopes 3.00 :1 OK Vegetated shelf slope 10.00 :1 OK Vegetated shelf width 10.00 fit OK Length of ftowpath to width ratio 3.00 :1 OK Length to width ratio 3.00 :1 OK Trash rack for overflow & orifice? Y (Y or N) OK Freeboard provided 1,10 fit OK Vegetated filter provided? N (Y or N) Design must be based on 90% TSS removal Recorded drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Drain mechanism for maintenance or emergencies Pump Form SW401-Wet Detention BasinAev.4 Parts I. & II. Design Summary, Page 2 of 2 Permit (to be provided by DWQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. r� C3 1. Plans (1" - 50' or larger) of the entire site showing: U - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. SKI C5 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: (J - Outlet structure with trash rack or similar, - Maintenance access, - Permanent pool dimensions, - Forebay and main pond with hardened emergency spillway, - Basin cross-section, - Vegetation specification for planting shelf, and - Filter strip. / u NIA 3. Section view of the dry detention basin (1" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. kI�J C5 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified u on the plans prior to use as a wet detention basin. C3 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay, to verity volume provided. �1" 7 C5 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. (J/y X 7. The supporting calculations. nnNnn/a X 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. X 9. A copy of the deed restrictions (if required). 1(! X 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.4 Part III. Required Items Checklist, Page 1 of 1 Permit Number: (Io be provided by DWQ) Drainage Area Number: 1 Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. 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): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ® does ❑ does not incorporate pretreatment other than a forebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.3 Page 1 of 1 Permit Number: (to be provided by DWQ) Drainage Area Number: 1 I BMP element: I Potential vroblem: I How I will remediate the uroblem: device: pipe or I The pipe is clogged. swale The forebay The vegetated shelf The main treatment area The pipe is cracked or otherwise damaged. Erosion is occurring in the swale. Sediment has accumulated to a depth greater than the original design depth for sediment storage. Erosion has Weeds are present. Best professional practices show that pruning is needed to maintain optimal plant health. Plants are dead, diseased or dying. Weeds are present. Sediment has accumulated to a depth greater than the original design sediment storage depth. Algal growth covers over 50% of the area. Cattails, phragmites or other invasive plants cover 50% of the basin surface. Unclog the pipe. Dispose of the sediment off -site. Replace the pipe. Regrade the swale if necessary to smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. Prune according to best professional practices Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Consult a professional to remove and control the algal growth. Remove the plants by wiping them with pesticide (do not spray). Form SW401-Wet Detention Basin O&M-Rev.3 Page 2 of 2 Permit Number: (to be provided by DWQ) Drainage Area Number: 1 BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. 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 6.5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 6;5 feet in the forebay, the sediment shall be removed. Sediment Removal Bottom BASIN DIAGRAM Ull in the blanks) Permanent Pool Elevation 48.5 42.9 Pe anen Pool --- ------------ -- Volume Sediment Removal Elevation 42.0 41.0 -ft Min. ------------------- ----- - - Sediment Bottom Elevation 41.11 Storage FOREBAY MAIN POND 1-ft Storage Form SW401-Wet Detention Basin O&M-Rev.3 Page 3 of 3 Permit Number: (to be provided by DWQ) 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 or prior to any changes to the system or responsible party. Project name: Sound of Freedom Shoppes BMP drainage area number: Print name: G. Michael Morton Title: Member/Manager Address: P.O. Box 12346, New Bern, NC 28561 Date: July 17, 2008 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. I, Beth Simmons North Carolina in , County of a Notary Public for the State of do hereby certify that G. Michael Morton personally appeared before me this 17th day of July , 2008 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, NOTARY PUBLIC SEAL My commission expires April_ 22, 2009 Form SW40I-Wet Detention Basin O&M-Rev.3 Page 4 of 4 High Density Commercial Subdivisions Deed Restrictions & Protective Covenances In accordance with Title 15 NCAC 2H.1000, the Management Regulations, deed restrictions and protective covenants are required for High Density Commercial Subdivisions where lots will be subdivided and sold and runoff will be treated in an engineered stormwater control facility. Deed restrictions and protective covenants are necessary to ensure that the development maintains a built - upon area consistent with the design criteria used to size the stormwater control facility. G. Michael Morton , acknowledge, affirm and agree by my signature below, that I will cause the following deed restrictions and covenants to be recorded prior to the sale of any lot within the project known as Sound of Freedom Shoppes 1. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number as issued by the Division of Water Quality under NCAC 2H.1000. 2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the stormwater management permit. 3. These covenants are to run with the land and be binding on all persons and parties claiming under them. 4. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water Quality. 5. Alteration of the drainage as shown on the approved plan may not take place without the concurrence of the Division of Water Quality. 6. The maximum allowable built -upon area per lot is 77,746 square feet. {OR, if the proposed built -upon area per lot will vary, please use the following format & language (in bold): The maximum built -upon area per lot, in square feet, is as listed below: Lot # BUA Lot # BUA Lot # BUA Lot # BUA Site 72,7G6 SF This allotted amount includes any built -upon area constructed within the lot property boundaries, and that portion of the right-of-way between the front lot line and the edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. 7. All runoff from the built -upon areas on the lot must drain into the permitted system. This may be accomplished through a variety of means including roof drain gutters which drain to the street, grading the lot to drain toward the street, or grading perimeter swales to collect the lot runoff and directing them into a component of the stormwater collection system. Lots that will naturally drain into the system are not required to provide these additional measures. 8. The owner of each lot, whose ownership is not retained by the permittee, is required to submit a separate stormwater permit application to the Division of Water Quality and receive a permit prior to conlSignature: 4 VtL G. Michael Morton Date: July 17, 2008 I, Beth Simmons , a Notary Public in the State of North Cnrolinn County of Craven do hereby certify that G. Michael Morton personally appeared before me this the 17th day of July 20 08 , and acknowledge the due execution of the foregoing instrument. Witness my hand�and Signature /4 My Commission expires April 22, 2009 NOTARY PUBLIC Form DRPC-1 Rev.1 Page 1 of t �4'9 ����`FN CC lC0f�����'G ci 4jL7 :: bneriC 6101VbA r� fi0*4 NCDENR Permit Number: (to be provided by DWQ) o�aF W A7Fq H y � r o STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM BIORETENTION CELL SUPPLEMENT This form most be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. I iP-ROJECT)INFORMATION#.,..' Project name Sound of Freedom Shoppes Contact name Joseph C. Avolis, P.E. Phone number 252-633-0068 Date July 17, 2008 Drainage area number 1 Site Characteristics Drainage area 21,200.00 ftz mpervious area 21,200.00 ft' Percent impervious 100.0% % Design rainfall depth 1.00 inch Peak Flow Calculations 1-yr, 24-hr runoff depth 3.90 in 1-yr, 24-hr intensity 0.16 in/hr Pre -development 1-yr, 24-11r peak Flow 5.72 ft3/sec Post -development 1-yr, 24-hr peak Flow 9.10 ft3/sec Pre/Post 1-yr, 24-hr peak control 2.82 ft3/sec Storage Volume: Non -SR Waters Design volume 1,679.00 ft3 Storage Volume: SR Waters Pre -development 1-yr, 24-hrrunoff N/A ft3 Post -development 1-yr, 24-hr runoff ft3 Minimum volume required 0.00 ft3 Volume provided ft3 Cell Dimensions I Ponding depth of water 9.00 inches OK Ponding depth of water 0.75 ft Surface area of the top of the bioretention cell 2240.00 ftZ OK Length: 87.80 It OK Width: 25.50 ft OK -or- Radius ___ ft Soils Report Summary Drawdown time, ponded volume 9.00 hr OK Drawdown time, to 24 inches below surface 33.00 hr OK Drawdown time, total: hr In -situ soil: Soil permeability 0.60 in/hr OK Planting media soil: Soil permeability 1.00 inmr OK Soil composition % Sand (by weight) 85% OK % Fines (by weight) 12% OK % Organic (by weight) 3% OK Total: 100% Form SW401-Bioretention-Rev.3 Parts I and II. Design Summary, Page 1 of 2 Permit Number: (to be provided by DWQ) 'hosphorus Index (P-Index) 3asin Elevations .emporary pool elevation 'lancing elevation (top of the mulch) 3ottom of the cell 'Ianting depth )epth of mulch 'HWT elevation are underdrains being installed? 20 (unitless) OK 53.35 fmsl 52.60 fmsl OK 49.35 fmsl It 3.00 inches OK 48.00 fmsl Insufficient SHWT level. How many clean out pipes are being installed? What factor of safety is used for sizing the underdrains? (See BMP Manual Section 12.3.6) Wditional distance between the bottom of the planting media and he bottom of the cell to account for underdrains 3ottom of the cell required )istance from bottom to SHWT type of bioretention cell (answer "Y' to only one of the two ollowing questions): Is this a grassed cell? Is this a cell with trees/shrubs? Planting Plan Number of tree species Number of shrub species Number of herbaceous groundcover species Additional Information Does volume in excess of the design volume bypass the bioretention cell? Does volume in excess of the design volume flow evenly distribute( through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? the BMP located at least 30 feet from surface waters (50 feet if t waters)? the BMP located at least 100 feet from water supply wells? e the vegetated side slopes equal to or less than 3:1? the BMP located in a recorded drainage easement with a corded access easement to a public Right of Way (ROW)? et velocity (from treatment system) the area surrounding the cell likely to undergo development in e future? Y (Y or N) 6 OK 10.00 OK 0.67 ft L8,0 fmsl 35 ft Insufficient distance to SHWT. Y (Y or N) OK N (Y or N) 0 More species are recommended. 0 More species are recommended. Y (Y or N) OK N (Y or N) Excess volume must pass through filter. Oft N (Y or N) Show how flow is evenly distributed. Y (YorN) OK Y (Y or N) OK Y (YorN) OK Y (YorN) OK 1.00 fUsec OK N (Y or N) OK e the slopes draining to the bioretention cell greater than 20%? N (Y or N) the drainage area permanently stabilized? Y (Y or N) etreatment Used Idicate Type Used with an "X" in the shaded cell) Gravel and grass (8'inches gravel followed by 3-5 fit of grass) Grassed swale Forebay None None None OK [oil Form SW401-Bioretention-Rev.3 Parts I and II. Design Summary, Page 2 of 2 Permit No: (to be assigned by DWQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. C2 1. Plans (1' - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Cell dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. C6 2. Plan details (1' = 30' or larger) for the bioretention cell showing: - Cell dimensions Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), - Clean out pipe locations, - Overflow device, and - Boundaries of drainage easement. C6 3. Section view of the bioretention cell (1' = 20' or larger) showing: - Side slopes, 3:1 or lower - Underdrain system (If applicable), and - Bioretention cell layers (ground level and slope, pre-treatment, ponding depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable), SHWT level(s), and overflow structure] X 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests, The results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in situ soil must include: - Soil permeability, - Soil composition (% sand, % fines, % organic), and -�j - P-index. 0A X 5. A detailed planting plan (1' = 20' or larger) prepared by a qualified individual showing: - A variety of suitable species, - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, - A planting detail, - The source nursery for the plants, and ,.mow ,,�,,���yyy - Fertilizer and watering requirements to establish vegetation. 1PI X 6. A construction sequence that shows how the bioretention cell will be protected from sediment until the entire drainage area is stabilized. X 7. The supporting calculations (including underdrain calculations, if applicable). X 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. X 9. A copy of the deed restrictions (if required). Form SW401-Bioretention-Rev.3 Part III, Page 1 of 1 Permit Number: (to be provided by DWQ) Drainage Area Number: 1 Bioretention Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important operation and maintenance procedures: — Immediately after the bioretention cell is established, the plants will be watered twice weekly if needed until the plants become established (commonly six weeks)- - Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell. — Heavy equipment will NEVER be driven over the bioretention cell. — Special care will betaken to prevent sediment from entering the bioretention cell. — Once a year, a soil test of the soil media will be conducted. After the bioretention cell is established, I will inspect it once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblems: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to bioretention cell erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. The inlet device: pipe, The pipe is clogged (if Unclog the pipe. Dispose of the stone verge or swale applicable). sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to Swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and clogged covered in sediment (if stone and replace with clean stone. applicable). Form SW401-Bioretention O&M-Rev.3 Page 1 of 1 BMP element: Potentialproblems: How I will remediate theproblem: The pretreatment area Flow is bypassing Regrade if necessary to route all pretreatment area and/or flow to the pretreatment area. allies have formed. Restabilize the area after grading. Sediment has accumulated to Search for the source of the a depth greater than three sediment and remedy the problem if inches. possible. Remove the sediment and restabilize the pretreatment area. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. The bioretention cell: Best professional practices Prune according to best professional vegetation show that pruning is needed practices. to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Tree stakes/wires are present Remove tree stake/wires (which six months after planting. can kill the tree if not removed). The bioretention cell: Mulch is breaking down or Spot mulch if there are only random soils and mulch has floated away. void areas. Replace whole mulch layer if necessary. Remove the remaining much and replace with triple shredded hard wood mulch at a maximum depth of three inches. Soils and/or mulch are Determine the extent of the clogging clogged with sediment. - remove and replace either just the top layers or the entire media as needed. Dispose of the spoil in an appropriate off -site location. Use triple shredded hard wood mulch at a maximum depth of three inches. Search for the source of the sediment and remedy the problem if possible. An annual soil test shows that Dolomitic lime shall be applied as pH has dropped or heavy recommended per the soil test and metals have accumulated in toxic soils shall be removed, the soil media. disposed of properly and replaced with new planting media. Form SW401-Bioretention O&M-Rev.3 Page 2 of 2 BMP element: Potentialproblems: How I will remediate theproblem: The underdrain system Clogging has occurred. Wash out the underdrain system. if applicable) The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of the sediment off -site. The drop inlet is damaged Repair or replace the drop inlet. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. Form SW401-Bioretention O&M-Rev.3 Page 3 of 3 Permit Number: (to be provided by DWQ) 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 or prior to any changes to the system or responsible party. Project name: Sound of Fredoom Shoppes BMP drainage area number: Print name: G. Michael Morton Title: Member/Manager Address: P.O. Box 12346, New Bern, NC 28561 Phone: Date: July 17, 2008 Note: The legally responsible parry 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. Beth Simmons , a Notary Public for the State of North Carolina , County of Craven , do hereby certify that G. Michael Morton personally appeared before me this 17th day of July 2008 , and acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my hand and official seal, TARY PUBLIC 41i, ENtC�````�� SEAL My commission expires April 22, 2009 Form SW401-Bioretention 1&M-Rev. 2 Page 4 of 4