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HomeMy WebLinkAboutSW8981129_Historical File_20070111Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality January 11, 2007 Leo Nowak, Member Manager Nowak & Warwick, LLC 14 Doctors Circle Supply, NC 28462 Subject: Stormwater Permit No. SW8 981129MOD Nowak & Warwick, LLC High Density Project Brunswick County Dear Mr. Nowak: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Nowak & Warwick, LLC on January 9, 2007. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 21-1:1000. We are forwarding Permit No. SW8 981129MOD dated January 11, 2007, for the construction of the subject project. This permit shall be effective from the date of issuance until January 11, 2017, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within sixty (60) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Chris Baker, or me at (910) 796-7215. Sincerely,-` Edward Beck Regional Supervisor Surface Water Protection Section ENB/csb: S:1WQSISTORMWATERIPERMIT1981129MOD.jan07 cc: Charles D. Cazier, P.E., Tripp Engineering Brunswick County Building Inspections Chris Baker Wilmington Regional Office N'c- Carolina Central Files mIrva) North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone (919) 733-7015 Customer Service Internet: www.ncwaterquality.org Location: N. 512 Salisbury St. Raleigh, NC 27604 Fax (919) 733-2496 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper State Stormwater Management Systems Permit No. SW8 981129MOD 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 Leo Nowak and Nowak & Warwick, LLC Nowak & Warwick, LLC Lot 52 Leland Industrial Park, Brunswick County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until January 11, 2017, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 3 of this permit. The stormwater control has been designed to handle the runoff from 158,126 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. The built -upon area for the future development is limited to 55,000 square feet. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. Page 2 of 7 State Stormwater Management Systems Permit No. SW8 981129MOD 6. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. b. C. d. e. f. 9• h. i. J• k. 1. M. n. Drainage Area, ycres: 6.5 Onsite, ft2: 283,140 Offsite, ft . None Total Impervious Surfaces, ft2: 158,126 Design Storm, inches: 1 Pond Depth, feet: 7.5 TSS removal efficiency: 90% Permanent Pool Elevation, FMSL: 36 Permanent Pool Surface Area, ft2: 9,633 Permitted Storage Volume, ft3: 22,122 Temporary Storage Elevation, FMSL: 38 Controlling Orifice: 1.5" 0 pipe Permitted Forebay Volume, ft3: 6,788 Receiving Stream/River Basin: Stream Index Number: Classification of Water Body: 11. SCHEDULE OF COMPLIANCE UT to the Cape Fear / Cape Fear 18-68-1-10-4 "C;Sw" 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet structure must be available at all times. Page 3 of 7 State Stormwater Management Systems Permit No. SW8 981129MOD 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 this pond is 1/8 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. Page 4 of 7 State Stormwater Management Systems Permit No. SW8 981129MOD 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 Sedime;;t Control Planning and Design � Manual. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. Permit issued this the 11th day of January, 2007. NORT OLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No. SW8 981129MOD Nowak & Warwick, LLC Stormwater Permit No. SW8 981129MOD Brunswick County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 6 of 7 State Stormwater Management Systems Permit No. SW8 981129MOD 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-DWO Regional Office Brunswick County Building Inspections Page 7 of 7 OFFICE USE ONLY Date Received Fee Paid Permit Number 5 O Z 12 State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): Nowak & Warwick LLC 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Leo Nowak Member Mana er 3. Mailing Address for person listed in item 2 above: 14 Doctors Circle City: Supply State: NC Zip: 28462 Telephone Number: 910-754-4100 4. Project Name (subdivision, facility, or establishment name — should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Nowak & Warwick LLC 5. Location of Project (street address): Lot 52 Leland Industrial Park City: Leland County: Brunswick 6. Directions to project (from nearest major intersection): Approx. 24001f West from the intersection of US Hwy 74/76 and SR 1426 to Mercantile Drive to project 7. Latitude: N 340 15' .00" Longitude: W 780 03' 30" of project 8. Contact person who can answer questions about the project: Name: Charles Cazier Telephone Number: 910-763-5100 II. PERAUT LWORMATION: 1. Specify whether project is (check one): New Renewal X Modification Form SWU-101 Version 3.99 Page 1 of 4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list The existing permit number SW8 981129 and its issue date (if known) 12-10-98 3. Specify the type of project (check one): Low Density X High Density Redevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): CAMA Major X Sedimentation/Erosion Control 404//401 Permit NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. in. 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. on -site wet detention and 2. Stormwater runoff from this project drains to the Cape Fear River basin. 3. Total Project Area: 6.5 acres 5. How many drainage basins does the project have? 4. Project Built Upon Area: 55.85 %. 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basir. Informai-o'ca h_Ie Bz3in : T3rainagr Basin 2 Receiving Stream Name UT to Cape Fear River Receiving Stream Class C-SW Drainage Basin Area 6.5 ac Existing Impervious * Area 1.164 ac Proposed Impervious * Area 3.63 ac % Impervious* Area (total) 55.85 % Impervious * Suihice area Drairta:ge Basin 1 Drainage Basin 2 On -site Buildings 36,000 sf On -site Streets On -site Parking 63,557 sf On -site Sidewalks 3,569 sf Other on -site Future 55,000 sf Off -site Total: 1=158,126 sf_ * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas sidewalks, gravel areas, etc. Form SW-101 Version 3.99 Page 2 of 4 7. How was the off -site impervious area listed above derived? IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. if lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 2. No more than square feet of arty lot shall be covered by structures of impervious materials. Impervious materials include asphalt, gravel, concrete, brick stone, slate or similar material but do not include wood decking or the water surface of swimming pools. 3. Swales shall not be filled in, piped or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of thepermittedamount requires a state stormwater management permit modification prior to construction. S. All permitted rung, f from outparcels or future development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (910) 733-5083 for the status and availability of these forms. Form SW-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SW-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement Form SW-107 Underground Infiltration Trench Supplement Form SW-108 Neuse River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of 4 VI. SUBAUTTAL 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. 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Applicant's Initials • Original and one copy of the Stormwater Management Permit Application Form << L • One copy of the applicable Supplement Form(s) for each BMP L. • Permit application processing fee of $420 (payable to NCDENR) • Detailed narrative description of stormwater treatment/management L • Two copies of plans and specifications, including:C�%C� - Development/Project name - Engineer and firm - Legend - North arrow - Scale - Revision number and date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent (individual or firm): Tripp Engineering, P.C. Mailing Address: 419 Chestnut Street City: Wilmington State: NC Zip: 28401 Phone: (10) 763-5100 Fax: (910) ?63-56? 1 VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) Leo Nowak , 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. Form SWU-101 Version 3.99 Page 4 of 4 Permit No. !7 GJ 9HM01J (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes a wet detention basin supplement for each basin, design calculations, plans and specifications showing all basin and outlet structure details, and a signed and notarized operation and maintenance agreement. I. PROJECT INFORMATION (please complete the following information): Project Name: Nowak & Warwick, LLC Contact Person: Charlie Cazier Phone Number: (910 ) 763-5100 4 For projects with multiple basins, specify which basin this worksheet applies to: 1 elevations Basin Bottom Elevation 29.5 ft. Permanent Pool Elevation 36.0 ft. Temporary Pool Elevation 38.0 ft. (floor of the basin) ' (elevation of the orifice) (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 9,633 sq.ft. (water surface area at the orifice elevation) Drainage Area Impervious Area volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Other parameters SA/DA' Diameter of Orifice Design Rainfall Design TSS Removal2 6.50 ac. (on -site and off -site drainage to the basin) 3.63 ac. (on -site and off site drainage to the basin) 33,209 cu.ft. (combined volume of main basin and forebay) 22,122 cu.ft. (volume detained above the permanent pool) 6,788 cu.ft. (approximately 20% of total volume) 2.60 (surface area to drainage area ratio from DWQ table) 1.5 in. (2 to 5 day temporary pool draw -down required) 1.0 in. 90 % (minimum 85% required) Form SWU-102 Rev 3.99 Page 1 of 4 Footnotes: I. When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non- standard table entries. 2. In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90% TSS removal. The NCDENR BAP manual provides design tables for both 85% TSS removal and 90% TSS removal. II. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initials GpC a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). GyC, b. The forebay volume is approximately equal to 20% of the total basin volume. c. The temporary pool controls runoff from the design storm event. �G d. The temporary pool draws down in 2 to 5 days. ! _ e. If required, a 30400t vegetative filter is provided at the outlet (include non -erosive flow calculations). f. The basin length to width ratio is greater than 3:1. g. The basin side slopes above the permanent pool are no steeper than 3:1. h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). i. Vegetative cover above the permanent pool elevation is specified. G j . A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right - of way. 1. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified to be performed prior to use as a wet detention basin ex in. A mechanism is specified which will drain the basin for maintenance or an emergency. * Pump will be provided for maintenance or emergency III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defned as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one) ❑ does X does not incorporate a vegetated filter at the outlet. This system (check one) ❑ does X does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 4.875 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 2.25 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 36.0 Sediment R moval El. 33.75 75 0 -------------- - Sediment Removal Elevation 31.125 75% Bottom evation 33.0 %-------------------------------------------- --- FOREBAY Bottom Elevation MAIN POND 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These plants shall be encouraged to grow along the vegetated shelf and forebay berm. 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent possible. 7. All components of the wet detention basin system shall be maintained in good working order. I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print name: Leo Nowak Title: Member Manager, Nowak & Warwick LLC Address: 14 Doctors Circle, Supply. NC 28462 Phone: 910-754-4100 Signature: Date:T/�� 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, Della C. Baird , a Notary Public for the State of North Carolina , County of Pender , do hereby certify that Leo Nowak personally appeared before me this Z, day of nCI �(` , 2006 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, 4: �pTAgy•• d' PUBOIF CO y MAN N My commission expires October 15, 2006 Form SWU-102 Rev 3.99 Page 4 of 4 WET DETENTION POND ANALYSIS FILE NAME: #VALUEI PROJECT #: SW8 981129 REVIEWER: C. Baker PROJECT NAME: Nowak and Warwick, LLC DATE: 11-Jan-07 Receivinq Stream: UT to the Cape Fear Class: C .Sw Drainage Basin: Cape Fear Index No. 18-68-1-10-4 Site Area 6.50 acres Drainage Area 283140.00 square feet Area in Acres 6.50 IMPERVIOUS AREAS Rational C Buildings 36000.00 square feet Parking 63557.00 square feet SW 3569.00 square feet Future 55000.00 square feet square feet square feet square feet TOTAL 158126.00 Isquare feet SURFACE AREA CALCULATION Rational Cc= 0.09 % IMPERVIOUS 55.85% SA/DA Ratio 1.73% Des. Depth 7.5 Req. SA 4909 sf TSS, 85 or 90: 90 Prov. SA I 9633 sf VOLUME CALCULATION * place a "1" in the box if Rational is used Rational ?* Des. Storm 1.00 inches Rv= 0.553 Bottom 29.5 msl Perm. Pool 36.00 msl Design Pool 38 msl Storage met @elev 37.18 msl Req. Volume 13039 cf Vol. Prov. at DP 22122 cf ORIFICE CALCULATION FOREBAY Perm. Pool Volume= Req. Forebay Volume= Provided Volume= Percent= 33209 6641.8 1 F : 6788.00 20.4% . Elevation Area Inc. Vol. Acc. Vol. 36.00 9633.00 0.00 38.00 12489.00 22122.00 22122.00 Avg. Head = 0.97 ft Q2 Area = 2.29 sq. inches Flow Q2, cfs 0.075 cfs Q5 Area = 0.92 sq. inches Flow Q5, cfs 0.030 cfs Orifice Area 1.77 sq. inches No. of Orifices 1 Q= 0.058 cfs Diameter, inches 1.50 weir H x W in x in Drawdown = 2.6 days Surface Area @DP = 12489 sq. ft. Falling Head Drawdown = 6.1 days C= 3.321666667 L= -0.194 COMMENTS Surface Area, Volume and Orifice are within Design Guidelines. CAPE FEAR RIVER BASIN Name of Stream Subbasin Stream Index Number Map Number Class Rockfish Creek CPF15 18-31-(15) H22NW2 C Rockfish Creek CPF15 18-31-(23) H23NW2 C Rockfish Creek ((Apchurches Pond, Old Brower CPF15 18-31-(18) H23NW2 B Mill Pond (Number Two Lake)) Rocky Branch CPF02 16-11-12 C20NW6 C;NSW Rocky Branch CPF11 17-41-1 E22SW1 C Rocky Branch CPF11 17-44-(1) E22NW9 C Rocky Branch CPF11 17-44-(2) E22NW9 WS-IV Rocky Branch CPF19 18-68-6-1 I25NE6 C;Sw Rocky Ford Branch CPF05 16-41-6-4-(1) D23SWB WS-IV;NSW Rocky Ford Branch CPF05 16-41-6-4-(2) D23SWB WS-IV;NSW,CA Rocky Marsh Creek (Best Pond) CPF19 18-68-1-15 H25NE7 C;Sw Rocky River CPF12 17-43-(1) D20SE5 WS-III Rocky River CPF12 17-43-(5.5) D21SW4 WS-III;CA Rocky River CPF12 17-43-(8) D21SW7 C Rocky Run Creek CPF13 18-20-16 F23SW4 C Rollins Branch CPF17 18-68-22-1-2-3 J26NWB C;SW Rollins Branch CPF20 18-68-22-1-2-3 J26NW8 C;Sw Rooty Branch CPF13 18-20-14 F23SW1 C Rooty Branch CPF22 18-74-19-12 G27SW4 C;Sw Rose Creek (Apple Pond) CPF01 16-8 C20NW3 C;NSW Roundabout Branch CPF14 18-23-16-6 F22SW7 WS-III Rowan Creek CPF20 18-68-13 125SE9 C;Sw Rowans Branch (Chestnut Pond) CPF19 18-68-2-8 H25NE3 C;Sw 'rio• 's3.1 cranch CPF17 18-77-1-1-1 J26S'E8 C;Sw Royal Mill Branch CPF19 r " G25SE7 C;Sw Run Branch CPF13 18-20-6-2-1 F22SW2 C Run Branch CPF21 18-74-6-2 G27NW5 C;Sw Russells Creek CPF17 18-81-5 K26NW9 C;Sw Ryan Creek CPF02 16-11-14-2-3 C19SEB C;NSW Salt Marsh Ditch CPF20 18-68-22-1-2-1-1 J25NE6 C;Sw Salters Lake CPF16 18-44-4 I24NW6 C Sand Hill Creek CPF23 18-74-42-1 I27SES C;Sw Sand Hill Creek CPF17 18-83 K27SW1 C;Sw Sandy Branch CPF12 17-43-16-1 E21NW9 C Sandy Creek CPF05 16-41-1-11 C23SW8 C;NSW Sandy Creek CPF09 17-16-(1) D20NW9 WS-III Sandy Creek CPF09 17-16-(3.5) E20NW2 WS-III;CA Sandy Creek CPF09 17-16-(4) E20NW2 C Sandy Creek CPF18 18-68-12-6 H24NW3 C;Sw Sandy Run CPF09 17-18-1 E20NW6 C Sandy Run CPF21 18-74-6.5 G27NW9 C;SW Sandy Run CPF21 18-74-14 G27SE1 C;SW Sandy Run Swamp CPF23 18-74-33-2 I28NE7 C;Sw Sawyer Branch CPF21 18-74-13-1 G27SE3 C;Sw Sawyer Creek CPF22 18-74-29-5 I27NW4 C;Sw Schoolhouse Branch CPF13 18-20-13-8 F22SE3 C Scotchman Creek CPF10 17-28.3 F20NE6 C;HQW Scott Branch CPF17 18-64-4 J26SW7 C;SW Scrub Creek CPF02 16-18-4.5-(1) C21NEB WS-II;HQW,NSW Scrub Creek CPF02 16-18-4.5-(2) C21NEB WS-II;HQW,NSW,CA Second Silver Run CPF13 18-20-33-1 F23SE3 WS-IV Service Creek (Servis Creek) CPF02 16-15 C21SW2 C;NSW Sevenmile.Swamp CPF19 18-68-1-3 G25NW5 C;Sw Page 24 of 30 m4 r LIMITED LIABILITY COMPANY ANNUAL REPORT NAME OF LL MD LIABILITY COMPANTY: Nowak & Warwick, LLC STATE OF INCORPORATION: NC SECRETARY OF STATE L.L.C. ID NUMBER: 0473948 NATURE OF BUSINESS: Real Estate Development REGISTERED AGENT: Noway Leo J REGISTERED OFFICE MAILING ADDRESS: 2524Independence Blvd Wilmington, NC 28412 SOSID: 0473948 Date Filed: 3/15/2006 4:27 PM Elaine F. Marshall North Carolina Secretary of State FEDERAL EMPLOYER ID NUMBER: 562107823 REGISTERED OFFICE STREET ADDRESS: 2524 Independence Blvd Wilmington, NC 28412 County: New Hanover PRINCIPAL OFFICE TELEPHONE NUMBER: (910) 791-0400 PRINCIPAL OFFICE MAILING ADDRESS: 2524Independence Blvd Wilmington, NC 28412 PRINCIPAL OFFICE STREET ADDRESS: 2524Independence Blvd Wilmington, NC 28412 MANAGERS/1VIEMBERS/ORGANIZERS: Steven J. Warwick Leo .1. Vwak Carolyn F. Nowak Title: Member Manager Title: Member Manager Title: Member 6208 Stonebridge Road 4229 Thurclev Rnnd 4229 Thursley Road Wilmingtonnc, NC 28409 Wilmington, NC 28412 Wilmington, NC 28412 Susan H. Warwick Title: Member 6208 Stonebridge Road Wilmington, NC 28409 CERTIFICAT! ON' OF AN.NUAL REPORT MUST BE COMPLETED BY ALL LIMITED LTIABR,ITY COMPANIES Leo J. Nowak FORM MUST BE SIGNED BY A MANAGER/MEMBER Leo J. Nowak 3/15/2006 DATE Manager/Member TYPE OR PRINT NAME TYPE OR PRINT TITLE ANNUAL REPORT FEE: E-Paid Secretary of State • Corporations Division • Post Office Box 29525 • Raleigh, NC 27626-0525 Job No. 06098 41 Date: 01/09/07 TRIPP ENGINEERING, P.C. 419 Chestnut Street, Wilmington, NC 28401 Phone: (910) 763-5100 - FAX: (910) 763-5631 Email: trippeng@ec.rr.com LETTER OF TRANSMITTAL To: NCDENR Attention: Chris Baker Subject: EXPRESS PERMIT REVIEW - Nowak & Warwick LLC FAX TRANSMITTAL: NUMBER OF PAGES INCLUDES COVER I am sending you:( X) ATTACHED ( ) UNDER SEPARATE COVER ( X ) Prints ( ) Tracings ( ) Copy of letter ( ) Specifications ( X ) Other _Copies Item No. Description 2 C1 Site Plan 2 C2 Details & Notes 1 $3 580 check These are transmitted as checked below: ( ) For Approval ( ) For Your Use ( ) Sign & Return ( X ) Review Remarks: All other documentation has previously been submitted cc: Signed: Charlie Cazier (0 N w 'd 0 n O P.4 o m N b O� .. OD C p Q 00 f*1 C4 44 I W 8 l0 la 'w 1 1,4 i� 0 CD f iA IN 44 {0 w bia 1 WN uo $1,9100 swnjIN f Ajunoes tie LO I o i Q e 000 f L i � f i � 0 k i Q .. to � � I a 00 " t. rd co ui m Q o � ui CN to i� z C%j ' - Gc.44 �4 rt... 4., o 44 . a� z .. E-4 . Q ' CCU. -ors .. i a Ln C- O Ln S O O O O ru ..a ti O O rm Ln Ln M ti O O TRIPP ENGINEERING, P.C. 419 Chestnut Street Wilmington, North Carolina 28401 Phone: (910) 763-5100 • FAX: (910) 763-5631 December 1, 2006 NCDENR Division Water Quality 127 Cardinal Drive Wilmington, NC 28405-3845 Attn: Mr. Cameron Weaver Re: Nowak & Warwick, LLC Brunswick County, NC TE 06098 Dear Cameron: Enclosed please find two (2) sets of plans, one (1) signed original and one (1) copy of the application form with narrative, one (1) wet detention basin supplement, two (2) sets of calculations, and a copy of the check for the express review fee. We respec fully request that all of the enclosed documents replace those that were originally submitted for review on October 4, 2006 Please review for approval and contact us with any questions or comments. Thank you. Sincerely, Tripp Engineering, P.C. Charles D. Cazier, . . CDC:bgw Enc. 11/24/06 Stormwater Narrative Nowak & Warwick, LLC Brunswick County, NC TE06098 Nowak & Warwick, LLC is an existing 6.5-acre commercial tract proposed for expansion. Impervious areas include 36,000 sf of building, 3,569 sf of sidewalk and 63,557 sf of asphalt. An additional 55,000 sf has been allocated for future development, creating a total lot impervious area of 158,126 sf or 55.85. The project will be treated by wet detention. Stormwater will be routed to the pond, which is sized to treat the first P of n-noff. Outflow from the pond drains to an unnamed tributary to the Cape Fear River, classification C-SW. DETENTION POND ANALYSIS PROJECT #: SW8 981129 PnvJECT NAME: Flow Serve FILE NAME: S:1WQSIPOND1981129.WK1 Drainage Basin: Unamed trib to Cape Fear Class: REVIEWER: sav r-% A T r . ur1 i rZ. 10-Dec-98 C-SW Chlorides: n/a Site Area 192573 square feet Drainage Area 192573 square feet needs to be verified Area in Acres 4.42 acres IMPERVIOUS AREA On -site Buildings 18000 square feet On -site Sidewalks 1500 square feet On -site Parking 31211 square feet Other on -site Future 33580 square feet square feet square feet TOTAL 8421 % IMPERVIOUS 43.77% Pond Depth: 6.5 TSS: SURFACE AREA CALCULATION SA/DA 1.989% Req. SA 38294Ci4 square feet Prov. SA 9633 square feet [From plan Contours] VOLUME CALCULATION Bottom 29.5 MSL Perm. Pool 3b' MSL Design Pool 38 MSL Design SA 12489 square feet [From plan Contours] Req. Volume 7122.81409 cubic feet Rv= 0.4439384 Prov. Volume 2122 cubic feet SA @ Elevation= ORIFICE CALCULATION Avg. Head = 0.96875 ft Flow Q2, cfs 0.12802083 Area, in 3.889942 Flow Q5, cfs 0.05120833 Area, in 1.555977 No. of Orifices 1;> Diameter, in 1 5 Area = 1.7671459 in2 Q, cfs = 0.0581581 Drawdown 4<02135 days COMMENTS Surface Area, Volume and Orifice are within Design Guidelines. .E TRIPP ENGINEERING, P.C. 419 Chestnut Street Wilmington, North Carolina 28401 Phone: (910) 763-5100 - FAX: (910) 763-5631 Nc� October 4, 2006 NCDENR Division of Water Quality 127 Cardinal Drive Wilmington, NC 28405-3845 Attn: Ms. Linda Lewis Re: Nowak & Warwick, LLC Brunswick County, NC TE 06098 Dear Linda: Enclosed please find two (2) sets of plans, one (1) signed original and one (1) copy of the application form with narrative, one (1) wet detention basin supplement, two (2) sets of calculations and one check for the application fee. Please review for approval and contact us with any questions or comments. Thank you. Sincerely, Tripp Engineering, P.C. Charles D. Cazier, E.I. CDC:dcb Enc. 7.,c 1'7 D 6 7006 BY