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HomeMy WebLinkAboutSW8960605_HISTORICAL FILE_20061103STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 q 1p C1D05 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS C� HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 700LO 1103 YYYYMMDD Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Y November 3, 2006 Mr. Michael Nadeau, Secretary Lakeside Estates, LLC C/o Creative Properties PO Box 56 Hampstead, NC 28443 Subject: Permit No. SW8 960605 Modification Lakeside Park High Density Subdivision Stormwater Project New Hanover County Dear Mr. Nadeau Alan W. Klimek, P.E. Director Division of Water Quality The Wilmington Regional Office received a complete, modified Stormwater Management Permit Application and Renewal for Lakeside Park on October 20, 2006, and issued a permit on October 24, 2006. The permit contained several errors and omissions that are being addressed via the new permit, attached. The permit issued on October 24, 2006, is replaced by this permit dated November 3, 2006. 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 960605 Modification, dated November 3, 2006, for the construction of the subject project. This permit shall be effective from the date of issuance until November 3, 2016, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within sixty (60) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150E of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Chris Baker, or me at (910) 796-7215. Since' Edward Beck Regional Supervisor Surface Water Protection Section ENB/csb: S:\WQS\STORMWATER\PERMIT\960605MOD.nov06 cc: Mark Hargrove, P.E., Withers and Ravenel Tony Roberts, New Hanover County Building Inspections Beth E. Wetherill, New Hanover County Engineering Chris Baker, DWQ Wilmington Regional Office Central Files n` rCarolina ura!!y North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Wilmington Regional Office Internet: ww•wncwatergualitv.orR Fax (910)350-2004 An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper Customer Service 1-87'7-623-6748 State Stormwater Management Systems Permit No. SW8 960605MOD 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 Michael Nadeau and Lakeside Estates, LLC Lakeside Park Medical Center Drive, Wilmington, New Hanover County FOR THE construction, operation and maintenance of 2 wet detention ponds 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 November 3, 2016, 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 in Section 1.6 on page 3 of this permit. The stormwater controls labeled as Pond 1 and Pond 2 have been designed to handle the runoff from 959,931 square and feet 988,703 square feet, respectively, of impervious area. 3. The tract will be limited to the amount of built -upon area indicated in Section 1.6 on pa e 3 of this permit, and per approved plans. Each lot in the subdivision is limited to a maximum of 85% of its lot area as built -upon area. 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 8 State Stormwater Management Systems Permit No. SW8 960605MOD 6. The following design criteria have been provided in the wet detention ponds and must be maintained at design condition: Pond Number: a. Drainage Area, acres: Onsite: Offsite: b. Total Impervious Surfaces, ft2: Lots @85%u, ft Roads/Parking, ft2: Other, ft2. Offsite, ft2: C. Design Storm: d. Pond Depth, feet: e. TSS removal efficiency: f. Permanent Pool Elevation FMSL: g. Permitted Surface Area, ft2: h. Permitted Storage Volume, ft3: . i. Temporary Storage Elevation, FMSL: j. Controlling Orifice: k. Permitted Forebay Volume, ft3: I. Receiving Stream/River Basin: M. Stream Index Number: n. Classification of Water Body: II. SCHEDULE OF COMPLIANCE M POND 1 POND 2 25.6 25.23 25.6 24.28 0 0.95 959,931 988,703 786,509 825,897 167,632 127,631 5,790 0 0 35,175 1" 1" 7.5 7.5 90% 90% 10.0 10.0 40,370 42,890 77,225 87,760 11.5 11.50 4" 0 4" 0 28,000 18,000 Greenfield Lake / Cape Fear CPF17 18-76-1 "C Sw" 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. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 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. Mowiny 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. o. Access to the outlet structure must be available at all times. 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. 1 Page 3 of 8 State Stormwater Management Systems Permit No. SW8 960605MOD 5. Decorative spray fountains will be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. c. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for a fountain in pond 1 is 1 /4 horsepower and pond 2 is-1/3 horsepower. 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. 12. 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. ' State Stormwater Management Systems Permit No. SW8 960605MOD 13. Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon area per lot to the amount as shown on the Project Data Sheet, per Section I, Part 2. The recorded statements must follow the form: a. The maximum built -upon area per lot is 85% of the lot area. The allotted BUA 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 street 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. b. 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. C. Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division of Water Quality. d. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the Stormwater Management Permit. e. These covenants are to run with the land and be binding on all persons and parties claiming under them. f. The connection into the pond must be made such that short-circuiting does not occur. g. All runoff on the lot must drain into one of the permitted systems. h. 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 construction. 14. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of recording the plat, and prior to selling lots. The recorded copy must bear the signature of the Permittee, the deed book number and page, and stamp/signature of the Register of Deeds. 15. 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 to any person or entity 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. Page 5 of 8 State Stormwater Management Systems Permit No. SW8 960605MOD 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 in writing of any name, ownership or mailing address changes within 30 days. Permit issued this the 3rd day of November 2006. NORTH C OLINA ENVIRONMENTAL MANAGEMENT COMMISSION Division of Water Quality By Authority of the Environmental Management Commission Page 6 of 8 State Stormwater Management Systems Permit No. SW8 960605MOD 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 Michael Nadeau, Lakeside Estates, LLC Lakeside Park New Hanover County FOR THE construction, operation and maintenance of 2 wet detention ponds 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 October 24, 2016, 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 1.6 on page 3 of this permit. The stormwater control has been designed to handle the runoff from 1,115,381 square feet of impervious area into pond 1 and 988,703 square feet of impervious area into pond 2. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. Page 2 of 8 State Stormwater Management Systems Permit No. SW8 960605MOD 6. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: Pond Number: POND 1 POND 2 Design Storm: 1" 1" Drainage Area, acres: 25.6 25.23 Onsite: 25.6 24.28 Offsite: 0 0.95 Total Impervious Surfaces, ft2: 1,115,381, 988,703 Buildings, ft2 786,509 825,897 Roads/Parking, ft2 167,632 127,631 Other, ft2 5,790 Offsite, ft2: 0 35,175 Pond Depth, feet: 7.5 7.5 TSS removal efficiency: 90% (no filter is required) Permanent Pool Elevation, FMSL: 10.0 10.0 Permitted Surface Area, ft2: 40,370 42,890 Permitted Storage Volume, ft;: 77,225 87,760 Temporary Storage Elevation, FMSL: 11.5 11.50 Controlling Orifice: 4"0 4"0 Permitted Forebay Volume, ft3: 28,000 18,000 Receiving Stream/River Basin: Greenfield Lake / Cape Fear Stream Index Number: CPF17 18-76-1 Classification of Water Body: "C Sw" 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. Page 3 of 8 State Stormwater Management Systems Permit No. SW8 960605MOD 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. Decorative spray fountains will be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. c. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for a fountain in pond 1 is 1/4 horsepower and pond 2 is 1/3 horsepower. 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. Page 4 of 8 State Stormwater Management Systems Permit No. SW8 960605MOD 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. 12. 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. 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. Page 5 of 8 State Stormwater Management Systems Permit No. SW8 960605MOD 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. Permit issued this the.24th day of October 2006. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Division of Water Quality By Authority of the Environmental Management Commission Lakeside Park Stormwater Permit No. SW8 960605 Modification New Hanover County Page 6 of 8 State Stormwater Management Systems Permit No. SW8 960605MOD 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. SW8 960605MOD 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 Regional Office New Hanover County Building Inspections :. : OFFICE USE ONLY -, Date Received Fee Paid Permit Number o /X0 O co A 900c),0 Su-6 to 5 fA State of North Carolina Department of Environmental and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION Applicants name (specify the name of the corporation, individual, etc. who owns the project): Lakeside Estates, LLC C/o Creative Properties 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Michael Nadeau, Secretary 3. Mailing Address for person listed in Item 2 above: P.O. Box 56 City: Hampstead State: NC Zip: ?9443 Telephone Number. (910) 270-5100 4.. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Lakeside Park 5. Location of Project (street address): Intersection of Carolina Beach Road and Bell Street. City: Wilmimt[on County: New Hanover 6. Directions to project (from nearest major intersection): 1'rom US-117S/Shipyard Blvd. turn right onto Carolina Beach Road, and right onto Medical Center Drive. 7. Latitude: 340 1 1' 55" N Longitude: 770 56' 01" W of project. 8. Contact person who can answer questions about the project:: Name: Losa Thomas II. PERMIT INFORMATION: l . Specify whether project is (check one): New FonnSWU-101 Version3.99 Page I of Telephone Number. (-910 )256-9277 Renewal X Modification 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number SW8 960605 Mod. and its issue date (if known) 09/24/03 3. Specify the type of project (check one): Low Density X High Density _ Redevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): CAMA Major _ 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 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. Wet detention 2. Stormwater runoff from this project drains to the 3. Total Project Area: 48.65 acres. 4. Project Built Upon Area: 92.0 %. 5. I -low many drainage areas does the project have? 2 River Basin. 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach and additional sheet with the information for each area provided in the same format as below. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Greenfield Lake Greenfield Lake Receivin = Stream Class C;Sw C; Sw Drainage Area 25.60 ac./l,115,381 sf 25.23 ac./1,099,019 sf Existing Im ervious*Area Proposed Impervious* Area 22.04 ae,/959,93I sf . 22.70 ac./988,703 sf % Impervious* Area (Total) 86.0% 90.0% Impervious* Surface Area Drainage Area I Drainage Area 2 On -Site Buildings 786,509 sf 825,897 sf On -Site Parking / Streets 167,632 sf 127,631 sf On -Site Sidewalks 5,790 sf Other On -Site Off -Site 35,175 sf Total: 959,931 sf Total: 988,703 sf *Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sideivalks, gravel areas, etc. Form SWU-101 Version 3.99 Page 2 of I -low was the off -site impervious area listed above derived? Shown in existing stonmvater permit. IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, out parcels, 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. 1. The following covenants are intended to ensure ongoing compliance with state stormivater 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 not include wood decking or the water surface ofswimming pools. 3. Swales shall not be fillet! in, pipecl, or altered except as necessmy to provide driveway crossings. 4. Built -upon area in excess of the permitted amount requires a state slornnvater management permit moclificalion prior to construction. 5. All permilted runofffr•om the outparcels orfiaure development shall be directed into are permitted stornrwaler control system. These connections to the slornrwater control system shall be performed in a manner that maintains are 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 rumwith 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 ofany 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 "french Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement Font SWU-101 Version 3.99 Page 3 of VI_: , SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. 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 LJT • One copy of the applicable Supplement Form(s) for each BMP Cd % • Permit application processing fee of $4000 (payable to NCDENR) tj7— • Detailed narrative description of Stormwater treatment/management W T • Two copies of plans and specifications, including: LJT - 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) VH. 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): Withers & Ravenel. Inc. Mailing Address: 7040 Wrightsville Avenue Suite 101 City Wilmington State: Phone: (910)256-9277 VHI. APPLICANT'S CERTIFICATION NC Zip 28403 Pax: (910)256-2584 1, (print or type name ofperson listed in General Information, Itent 2) Michael Nadeau, Secretary 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 orded, and the proposed project complies with the requirements of 15A - NCAC 2F1.1000. Signature: Date: ta,Z/ /aG Form SWU-101 Version 3.99 Page 4 of LAKESIDE PARK STORMWATER PERMIT NO. SW8 960605 MODIFICATION NCDWQ CALCULATIONS October 6, 2006 Withers & Ravenel, Inc. 7040 Wrightsville Avenue, Suite 101 Wilmington, North Carolina 28403 (910) 256-9277 SEAL 19742 FNGINS O ti HAPGP\\��: RECEIVED LOCT 0 6 1006 BY:_ - --- STORMWATER NARRATIVE LAKESIDE PARK MODIFICATION CITY OF WILMINGTON, NC SITE DESCRIPTION The + 68.77 acre site is located northwest at the intersection of Wellington Avenue and S. 171h Street in the City of Wilmington, North Carolina. STORM DRAINAGE DESIGN A modification is required for this site because the existing drainage area has increased to existing regional pond no. 1 and the project area was modified. See the attached drainage area map for the location of the new drainage area and project boundary. The drainage area was modified to accommodate the stormwater permit for the Wilmington Health Associates site plan in order to avoid wetland impacts. A total of 2.48 acres has been added to the drainage area of existing regional pond no. 1 along with additional imperious area. See Stormwater Permit No. SW8 060647 (Wilmington Health Associates) for a detailed description of how the impervious areas were allocated. The project boundary was modified to accommodate the stormwater permit for the . Wisteria Medical Center site plan. The adjacent property owner purchased 0.30 acres from Lakeside Estates, LLC for the construction of a fire line and for mitigated trees required by the City of Wilmington. WITHERS &- RAVENEL ENGINEERS I PLANNERS I SURVEYORS Lakeside Park — Pond No.1 Modification Existing Area Draining to the Pond = 1,007,107 sf = 23.12 acres Additional Area Draining to Pond = 108,274 sf = 2:48 acres Total Area Draining to Pond= 1,115,381 SF = 25.60 acres Additional Impervious Surfaces to Pond No. 1: Building = 28,564 sf Sidewalk = 5,790 sf Parking = 52,199 sf Total 86,553 sf Total Proposed Impervious Surface Area Draining to Pond No. 1: Total Existing Impervious Area = 873,378 sf Total Additional Impervious Area = 86,553 sf 959,931 sf (22.04 acres) % Impervious draining to pond = 959,931 / 1,115,381 = 86.1 % Required Storage for 1-Inch of Runoff For Pond: (use Schueler Method) = 0.05 + 0.009 (1) = 0.05 + 0.009(86.1) = 0.8249 = (1")(0.8249)(1/12)(1,115,381) = 76,673 cf (77,225 cf provided at elev 11.5) No Pond Storage Revisions Required. POND DEPTH SA/DA % (FT) 7.5 3.10 If Pond Depth = 7.5 ft, minimum surface area = 34,577 sf Used 90% TSS chart to size pond Area Q elevation 10.0 = 40,370 SF > 34,577 sf No Pond Surface Area Revisions Required. POND SURFACE AREA (MIN.) (SF) 34,577 7040 Wrightsville Avenue. Suite mi Wilmington. North Carolina 28403 tel:910-256-9277 Fax:910-256-2584 w .,vithersrevenelxom WITHERS & RAVENEL ENGINEERS 1 PLANNERS I SURVEYORS 7040 Wrightsville Avenue, Suite ioi WILMINGTON, NORTH CAROLINA, 28403 (910)256.9277 FAX (910) 256.2584 TO: Chris Baker NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 WE ARE SENDING YOU ❑ Shop Drawings ❑ Copy of Letter LETTE' TF T'ANSMITTAL DATE 10 2o/o6 JOB NO. 2o5465.oi I ATTENTION Chris Baker PHONE# RE Lakeside Park Modification Stormwater Permit No. SW8 96o6o5 Mod. ® Attached ❑ Under separate cover via the following items: ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Change order ❑ Diskette ® Permit application COPIES DATE NO. DESCRIPTION 1 StormwaterManagement PermitA licationForm(SWU-ioi) 1 Wet Detention Basin Supplernentfor_P_ond-No 1(SWU-102) C xN714 CT 2 6 2009 THESE ARE TRANSMITTED as checked below: ❑ For approval ❑ Approved as submitted ® For your use ❑ Approved as noted ❑ As requested ❑ Returned for corrections ❑ For review and comment ❑ ❑ FOR BIDS DUE ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: ❑ Resubmit copies for approval ❑ Submit _copies for distribution ❑ Return _ corrected prints Attached are the original signed copies of the stormwater permit applications for the Lakeside modification as requested. Thank you. COPY TO: SIGNED: ifenckuums am not as noted, kindly notlfy'is at once. WITHERS & RAbENEL LMER OFT° °KSMMAL ENGINEERS I PLANNERS I SURVEYORS 7040 Wrightsville Avenue, Suite ioi WILMINGTON, NORTH CAROLINA, 28403 (910) 256-9277 FAX (910) 256-2584 To: Chris Baker NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 284o5 1^I �:T:7 �19i11G$l'I#IiJ ❑ Shop Drawings ❑ Copy of Letter DATE 10 1 /06 JOB NO. 2o5465.ol 1 ATrE"ON Chris Baker PHONE# RE: Lakeside Park Modification Stormwater Permit No. SW8 96o6o5 Mod. ® Attached ❑ Under separate cover via the following items: ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Change order ❑ Diskette ® Permit application COPIES DATE NO. DESCRIPTION l Revised Stormwater Management Permit Application Form (SWU-iol) THESE ARE TRANSMITTED as checked below: ® For approval ❑ Approved as submitted ❑ For your use ❑ Approved as noted ❑ As requested ❑ Returned for corrections ❑ For review and comment ❑ ❑ Resubmit copies for approval ❑ Submit _copies for distribution ❑ Return corrected prints ❑ FOR BIDS DUE ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: Please insert the revised sheet of the Stormwater Management Permit Application that was submitted previously on October 6 2oo6. Thank you. COPY TO: Ifendwums am not as noted, kindly notlfyus atone. WITHERS & RAVENEL ENGINEERS I PLANNERS I SURVEYORS October 6, 2006 Paul Bartlett Environmental Engineer II NCDENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Subject: Lakeside Park -god submission Stormwater Project No. SW8 960605 Mod. Dear Paul, We received Linda Lewis's letter dated August 28, 2006, and have made the necessary revisions as requested. The following is our response to your comments. Please submit the required application fee. All permit modifications must be accompanied by the required application fee. Ifyou wish to utilize Express for this modification, please contact Cameron Weaver to schedule a review date. If you wish to submit through the regular program, please submit a $420.00 application fee, along with the requested items below. Response: We have spoke with Cameron Weaver and will submit this permit modification express. Attached is the required $4,000.00 application fee. 2. Please provide anew overall drainage area plan depicting the revised drainage area for Pond 1 and the unchanged DA for Pond 2. Response: The drainage plan has been modified to include the entire drainage areas for both pond nos. 1 and 2. See attached NCDWQ calculations. 3. Please add Pond 2 to the application. The application for all modifications to previously issued permits must contain both the revised information and unchanged information. For this project, Pond 2 is not proposed to be revised, but it is still part ofthe permit, and therefore, must be listed on the modified application. A new supplement form is not necessary for Pond 2, since it is not being revised. Response: The Pond No. 2 information has been included on the state stormwater permit application. Please insert Sheets 3 and 4 of the attached state 7040 Wrightsville Avenue, Suite tot Wilmington, North Carolina 28403 tell: 910-256-9277 fax: gio-256-2584 www.withersravenel.com Ili WITHERS & RAVENEL ENGINEERS I PLANNERS I SURVEYORS permit applications to the previously submitted and signed stormwater management permit application form for the Lakeside Park modification. If you have any questions or require additional information, please do not hesitate to contact us. Sincerely, Lisa J. Thomas Withers & Ravenel, Inc. logo Wrightsville Avenue, Suite ioi Wilmington, North Carolina 28403 tell: 910-256-9277 fax: gio-z56-z58q I~.withersravenel.com WITHERS & RAVENEL LETTE' OF TRANSMITTAL ENGINEERS I PLANNERS I SURVEYORS 7040 Wrightsville Avenue, Suite iot WILMINGTON, NORTH CAROLINA, 28403 (910)256-9277 FAX (910) 256-2584 To: Paul Bartlett NC Division of Water Qualitv 127 Cardinal Drive Ext. Wilmington, NC 284o5 WE ARE SENDING YOU ❑ Shop Drawings ❑ Copy of Letter DATE 1o/o6/06 100NO. 2o5465.oi 1 ATTENnON Paul Bartlett PHONE# RE Lakeside Park Modification Stormwater Permit No. SW8 96o6o5 Mod. ® Attached ❑ Under separate cover via the following items: ❑ Prints ® Plans ❑ Samples ❑ Specifications ❑ Change order ❑ Diskette ® Permits and calcs. COPIES DATE NO. DESCRIPTION 2 10/06/06 NCDWQ Calculations and Drainage Ma 1 Stormwater Management Permit Application Form (SWU-lol) 1 io/o6 o6 Comment Response Letter per Linda's comments 1 10/03/06 Fee checks for Lakeside modification #1883 and #1884 THESE ARE TRANSMITTED as checked below: ® For approval ❑ Approved as submitted ❑ Foryour use ❑ Approved as noted ❑ As requested ❑ Returned for corrections ❑ For review and comment ❑ ❑ Resubmit 2 copies for approval ❑ Submit _copies for distribution ❑ Return _ corrected prints ❑ FOR BIDS DUE ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS: For approval of Lakeside Park modification per the projects listed below: Wilmington Health Associates Wisteria Medical Center COPYTO: File, John Simons, Bryan Greene SIGNED: /fenc%sums am not as noted, Hndtvni