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HomeMy WebLinkAboutSW8970531_Historical File_20060724Michael F. Easley, Governor �O� QG r July 24, 2006 Mr. Charles D. PO Box 1595 Wilmington, NC Dean, Jr. 28402-1595 Subject: Stormwater Permit No. SW8 970531 Dean Hardwoods @Leland High Density Project Brunswick County Dear Mr. Dean: William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality The Wilmington Regional Office received a complete modified Stormwater Management Permit Application for Dean Hardwoods @Leland on July 5, 2006. The property was formerly known as the CTP Carrera Site. Staff review of the modified 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 970531 Mod. dated July 24, 2006, for the construction of the subject project. This permit shall be effective from the date of issuance until July 24, 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 Linda Lewis, or me at (910) 796-7215. Si/nce I J/ Edward Beck Regional Supervisor Surface Water Protection Section ENB/arl: S:1WQSISTORMWATIPERMIT1970531 Mod.ju106 cc: Phil Norris, P.E., Norris Kuske & Tunstall Delaney Aycock, Brunswick County Building Inspections Linda Lewis Wilmington Regional Office Central Files NoDO Carolina atura!!r� North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www.ncwateraualitv.ore Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper State Stormwater Management Systems Permit No. SW8 970531 Mod. 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 Charles D. Dean, Jr., Owner Dean Hardwoods @Leland 9244 Industrial Boulevard, Leland, 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 July 24, 2016, 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 138,740 square feet of built - upon area 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 5,688 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 2of7 State Stormwater Management Systems Permit No. SW8 970531 Mod. 6. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, Acres: 5.31 Onsite, ft 1 231,354 Offsite, ft2: 0 b. Total Impervious Surfaces, ft2: 138,740 G. Design Storm, inches: 1 d. Pond Depth, feet: 4.0 e. TSS removal efficiency: 90% f. Permanent Pool Elevation, FMSL: 35.00 g. Permanent Pool Surface Area, ft2: 13,529 h. Permitted Storage Volume, ft3: 14,285 i. Temporary Storage Elevation, FMSL: 36.00 j. Controlling Orifice: 2.0" 0 pipe k. Permitted Forebay Volume, ft3: 6,354 I. Receiving Stream/River Basin: UT Rowell Branch / CPF17 M. Stream Index Number: 18-77-1-1-1 n. 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. 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 970531 Mod. 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 void 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 970531 Mod. 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. Permit issued this the 24th day of July 2006. NOR AROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Hian vv. KhmeK, N.t., Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No. SW8 970531 Mod. Dean Hardwoods @Leland Stormwater Permit No. SW8 970531 Mod. 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 970531 Mod. Certification Requirements: 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 Delaney Aycock, Brunswick County Building Inspections Page 7of7 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): Charles D. Dean, Jr. 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Charles D. Dean, Jr., Owner 3. Mailing Address for person listed in item 2 above: P.O. Box 1595 City: Wilmington State: NC Zip: 28402-1595 Telephone Number: (910) 763-5409 4. Project Name (subdivision, facility, or establishment name —should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Dean Hardwoods Q Leland S. Location of Project (street address): 9244 Industrial Boulevard City: Leland 6. Directions to project (from nearest major intersection): County: Brunswick From intersection of US 17 & US 74f76, take US 74/76 west to Mt. Misery Rd. Tum right & follow Mt. Misery Rd. to Industrial Blvd. Turn left onto Industrial Blvd. Site is approx. 1 mile on right. 7. Latitude: 780 03' 28" Longitude: 340 16' 18" of project Contact person who can answer questions about the project: Name: J. Phillip Norris, P.E. Telephone Number: (910) 343-9653 H. PERMIT INFORMATION Specify whether project is (check one): New Form SWU-101 Version 3.99 Page 1 of 4 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 970531 And its issue date (if known) March 2, 2000 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. 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. Retention Pond. 2. Stormwater runoff from this project drains to the Cape Fear River Basin. 3. Total Project Area: 5.3 AC 4. Project Built Upon Area: 60 5. How many drainage areas does the project have? 1 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name UT Rowel Branch Receiving Stream Class C Swam Drains a Area 231,354 SF / 5.311 AC Existing Impervious * Area 57,397 SF / 1.318 AC Proposed Impervious* Area 81,415 SF / 1.869 AC Impervious* Area (total) 60% Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings 50,799 SF / 1.166 AC On -site Streets 0 On -site Parking 80,934 SF / 1.858 AC On -site Sidewalks 1,319 SF / 0.030 AC Other on -site (Future) 5,688 SF / 0.131 AC Off -site 0 Total: 138,740 SF / 3.185 AC Total: Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas sidewalks, gravel areas, etc. Form SWU-101 Version 3.99 Page 2 of 4 7. How was the off -site impervious area listed above derived? NIA 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. 1. 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 138,740 square feet ofarty lot shall be covered by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick; stone, slate or similar material but do not include wood decking or the water surface of swimming pools. 3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to construction. 5. All permitted runofffrom outparcels or future development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall be per in a manner that maintains the integrity and performance of the system as permitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SW-102 Form SWU-103 Form SWU-104 Form SW-105 Form SW-106 Form SWU-107 Form SW-108 Form SWU-109 Wet Detention Basin Supplement Infiltration Basin Supplement Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Underground Infiltration Trench Supplement Neuse River Basin Supplement Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of 4 VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. • Original and one copy of the Stormwater Management Permit Application Form • One copy of the applicable supplement form(s) for each BMP • Permit application processing fee of $42&�payable to NCDENR) '�4Qti�S� • Detailed narrative description of stormwater treatment / management • Two copies of plans and specifications, including: - Development / Project name - Engineer and firm - Legend - North arrow Scale - Revision number & date - Mean high water line - Dimensioned property / project boundary Location map with named streets or NCSR numbers Original contours, proposed contours, spot elevations, finished floor elevations 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. J. Phillip Norris, P.E. Designated agent (individual or firm): Norris, Kuske & Tunstall Consulting Engineers, Inc. Mailing Address: 902 Market Street City: Wilmington State: NC Zip: 28401 Phone: (910) 343-9653 VIH. APPLICANT'S CERTIFICATION Fax: (910) 343-9604 I, (print or type name ofperson listed in General Information, item 2) Charles D. Dean, Jr., Owner 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 1 SA NCAC 2H.1000. Signature: Form SWU-101 Version 3.99 Page 4 of 4 Date: / 2 o O (, NKT #06066 Permit No. U pI0531 ;i/ State of North Carolina (to be provided by DwQ) 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 DWO Stormwater Management Plan Review. A complete stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. L PROJECT INFORMATION Project Name: Dean Hardwoods @ Leland Contact Person: J. Phillip Norris, P.E. Phone Number: (910) 343-9653 For projects with multiple basins, specify which basin this worksheet applies to: 1 elevations Basin Bottom Elevation Permanent Pool Elevation Temporary Pool Elevation areas 31.00 ft. 35.00 ft. 36.00 ft. Permanent Pool Surface Area 13,529 sq. fL Drainage Area 5.31 ac. Impervious Area 3.18 ac. (floor of the basin) (elevation of the orifices) (elevation of the discharge structure overflow) (water surface area at the orifice elevation) (on -site and off -site drainage to the basin) (on -site and off site drainage to the basin) volumes Permanent Pool Volume 29,304 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 14,285 cu. ft. (volume detained above the permanent pool) Forebay Volume 6,354 cu. ft. (approximately 20% of total volume) Other parameters SA/DA' 0.053 Diameter of Orifice 2.0 in. Design Rainfall 1.0 in. Design TSS Removal' 90 % Form SWU-102 Version 3.99 (surface area to drainage area ratio from DWQ table) (2 to 5 day temporary pool draw -down required) (minimum 85% required) Page 1 of 4 Footnotes: 1. When using the Division SAMA tables, the correct SA/DA ratio forpermanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determme the con+ect vahie fur .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 9W. TSS removal. The NCDENR BUF manual provides design tables fur both 85%TSS removal and 900% INS removal. H. 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. Initials a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). b. The forebay volume is approximately equal to 201/o of the basin volume. c. The temporary pool controls runoff from the design storm event. The temporary pool draws down in 2 to 5 days. e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations. f. The basin length to width ratio is greater than 3:1. The basin side slopes above the permanent pool are no steeper than 3:1. 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. 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- w. feasin is used for sediment and erosion control during construction, clean out of the basin is -specified -prior to use as a wet detention basin. m. A mechanism is specified which will drain the basin for maintenance or an emergency. III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT 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 This system (check one) ❑ does Form SWU-102 Version 3.99 ® does not incorporate a vegetated filter at the outlet. ® does not incorporate pretreatment other than a forebay. 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 basin 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 temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, reseed 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 be handled in a manner that will not 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 3.0 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 2.62 feet in the €orebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 35.00 Sediment Re oval El. 32.38 750 --------------- --- Sediment Removal Elevation 32.00 75% Bottom El vation 31.50 5%------------------------------------ ----- Bottom Elevation 31.00 125%/ FOREBAY 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 practical. Form SWU-102 Version 3.99 Page 3 of 4 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: Charles O . Dean, jr. Title: Owner Address: P.O. Box 1595 Phone: 910-763-5409 Signature: 0 Date: Wilmington, NC 28402-1595 vo Note: The legally responsible party should not be a homeowners association unless more than 501% of the lots have been sold and a resident of the subdivision has been named the president. L 64 S, R 6111 , a Notary Public for the State of N Q j('�' L r 6' I A CL County of �� R b'4L ( , do hereby certify that ('1 { S . �Qk (�fi Personally appeared before me this l0 day of and acknowledge the due Execution of the foregoing wet detention basin maintenance requirements. Witness my hand and official seal. 1-kIBLY0 A. � CO, Signature My commission expires U 0 5- V 6- 69 Form SWU-102 Version 3.99 Page 4 of 4 Michael 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 June 22, 2006 Mr. Charles D. PO Box 1595 Wilmington, NC Dean, Jr. 28402-1595 Subject: Request for Additional Information Stormwater Project No. SW8 970531 Mod. Dean Hardwoods @Leland Brunswick County Dear Mr. Dean: The Wilmington Regional Office received a Stormwater Management Permit Application for Dean Hardwoods @Leland on June 21, 2006. The project is located at 9244 Industrial Boulevard in Leland, NC. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: 1. The pond appears to be located on property currently owned by CPT Carrera, Inc. The pond should be located on property you own so that you have control . over what happens to the pond and have access for maintenance. If you do not own the land, the Division will require assurances that the pond will remain open and accessible in the form of an easement agreement between you and CPT Carrera, Inc. Please submit a copy of a signed, executed and recorded easement agreement. 2. Please provide proposed grades for the new pavement located on the east side of the site, adjacent the existing access drive. Additionally, please provide information regarding how the runoff that will drain through the pipe under the new drive leading to the west side, will drain into the pond. This area is surrounded by pavement that appears to be at a higher grade. 3. Please add a note to the plans indicating that all roof drainage must be directed into the wet detention pond. 4. There are several existing pipes that will be affected by this project. Please note on the plans what will happen to these pipes, i.e., removed, plugged, extended, etc. 5. Please provide a 3:1 Length to Width ratio in the pond. As currently specified, the pond only has a 2:1 ratio. Please note that this request for additional information is in response to a preliminary review. The requested information should be received in this Office prior to July 7, 2006, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. NarJU Vp°, ca North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www.ncwaterqualitv.ore Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper Mr. Dean June 22, 2006 Stormwater Application No. SW8 970531 Mod. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 796-7404. Sincerely, Linda Lewis Environmental Engineer ENB/arl: S:\WQS\STORMWATER\ADDINFO\2006\970531.jun06 cc: Phil Norris, P.E., Norris Kuske & Tunstall Jeff Phillips, Brunswick County Engineering Linda Lewis Page 2of2 Express Review Comments for SW8 970531 Dean Hardwoods Subject: Express Review Comments for SW8 970531 Dean Hardwoods From: Linda Lewis <linda.lewis@ncmail.net> Date: Thu, 22 Jun 2006 17:46:03 -0400 To: Phil Norris <pnorris@kteng.com> Phil: Attached please find my review comments for this project. Linda ....... .......... Content -Type: application/msword 970531mod.junO6.docii Content -Encoding: hase64 _ .. .................. .. ...... _ _. ......................... ........... 1 of 1 6/23/2006 8:32 AM Michael 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 June 22, 2006 Mr. Charles D. PO Box 1595 Wilmington, NC Dean, Jr. 28402-1595 Subject: Request for Additional Information Stormwater Project No. SW8 970531 Mod. Dean Hardwoods @Leland Brunswick County Dear Mr. Dean: The Wilmington Regional Office received a Stormwater Management Permit Application for Dean Hardwoods @Leland on June 21, 2006. The project is located at 9244 Industrial Boulevard in Leland, NC. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: The pond appears to be located on property currently owned by CPT Carrera, Inc. The pond should be located on property you own so that you have control over what happens to the pond and have access for maintenance. If you do not own the land, the Division will require assurances that the pond will remain open and accessible in the form of an easement agreement between you and CPT Carrera, Inc. Please submit a copy of a signed, executed and recorded easement agreement. 2. Please provide proposed grades for the new pavement located on the east side of the site, adjacent the existing access drive. Additionally, please provide information regarding how the runoff that will drain through the pipe under the new drive leading to the west side, will drain into the pond. This area is surrounded by pavement that appears to be at a higher grade. 3. Please add a note to the plans indicating that all roof drainage must be directed into the wet detention pond. 4. There are several existing pipes that will be affected by this project. Please note on the plans what will happen to these pipes, i.e., removed, plugged, extended, etc. 5. Please provide a 3:1 Length to Width ratio in the pond. As currently specified, the pond, only has a 2:1 ratio. Please note that this request for additional information is in response to a preliminary review. The requested information should be received in this Office prior to July 7, 2006, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. N�&t�tCaro ' a dvatur2 North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet: www.ncwaterguality.org Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer - 50% Recycled110% Post Consumer Paper Mr. Dean June 22, 2006 Stormwater Application No. SW8 970531 Mod. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 796-7404. Sincerely, r Linda Lewis Environmental Engineer ENB/arl: S:\WQS\STORMWATER\ADDINFO\2006\970531.jun06 cc: Phil Norris, P.E., Norris Kuske & Tunstall Jeff Phillips, Brunswick County Engineering Linda Lewis Page 2 of 2 L" ) ee55- L L- &-22-(56P NORRIS, KUSKE TU NSTALL CONSULTING ENGINEERS, INC. June 21, 2006 Mr. Cameron Weaver, Express Review Coordinator NC DENR / Division of Water Quality Water Quality Section 127 Cardinal Drive Extension Wilmington, NC 28405-3845 Re: State Stormwater Permit Express Review Submittal Dean Hardwoods @ Leland Leland, NC NKT Project No. 06066 Dear Mr. Weaver: J. Phillip Norris, P.E. John A. Kuske, III, P.E. John S. Tunstall, P.E. J.A. Kuske, P.E. of Counsel 00, '5 W �v / P� in ClG�I�Ii,r 2 .0-g-O& Chi eck- F� 5oC c�lpss, Enclosed are two (2) sets of plans for the subject project, one (1) drainage area plan, one (1) set of calculations, one (1) copy of the stormwater narrative, the original Division of Water Quality Stormwater Management Permit application and the original SWU-102 supplement form. The express permit review fee was submitted as a combined check with the State erosion control express review on June 8, 2006. Please review this information for approval and contact us with any questions or comments you may have. Thank you for your assistance on this project. Sincerely, NORRIS, KUSKE & TUNSTALL CONSULTING ENGINEERS, INC. �?U' 'LL- i Waw- azk-" IJ.hillip Norris, P. . JPN/asn 06066 06-21-06-s-sw express-Itr Enclosures U, cc: Charles Dean, Jr. (w/ 1 Copy of All) - 902 Market Street • Wilmington, NC 28401-4733 0 Phone: 910.343.9653 • Fax: 910.343.9604 Date Design `a{. _ NORRIS, KUSKE &TUNSTALL 902 MarkNaJobNo. rd � CONSULTING ENGINEERS, INC. Wilmington, N.C.28401- Check Job For S1i7P-�'t�1t�� GSec.cv�so,� S DeOV,' �2'PwooP S L 6—' 400 v f "C. %V70P . SWS- g7V45:5 1 01 fo6,a1� RECEIVED JUL O S 206 DWQ PROJ# -89,7051/Airvi Date `/ 60/1 6(j, vv Design � -- NORRIS, KUSKE &TUNSTALL 902 Market St. .' � CONSULTING ENGINEERS, INC. Wilmington, N.C.28401-4733 Sheet / Of d. Check Job 377,,,/d�(...�''L �•/�E�-�. For Ce5q^_)Q� Job No. / I vr' 666 r /eV yf.Gpa4 06,1 06/93ta���� =� '1 qta 1`7 3 AA Z6 1 .,R P r, Date Design NORRIS, KUSKE &TUNSTALL 902 Market St. Sheet CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401-4733 Of Check Job For I Job No. mod-.' ��'� '� �'� �''��s- ''�,° m ;` �„ �,�, s�` �. ,�����,•�-�:�� K I .� 3 40 LO s;Y. J55 4 •. A41 1 4J C� 3 5-3 f7OR56 4 �1;3 D STORMWATER SYSTEM & EROSION CONTROL NARRATIVE JEAN HARDWOODS @ LELAi'D LELAND, NORTH CAROLINA For Dean Hardwoods, Inc. P.O. Box 1595 Wilmington, NC 28402-1595 (910) 763-5409 ,ECEIVEI7 JUN 21 2066 DW -nj # SW `�QL Huo May 2006 Prepared by: NORRIS, KUSKE & TUNSTALL CONSULTING ENGINEERS, INC. 902 Market Street Wilmington, North Carolina 28401 (910) 343-9653 (910) 343-9604 (Fax) E-mail: office@nkteng.com NKT Project No. 06066 NARRATIVE DESCRIPTION: The project site is an existing developed 11 acre tract located in the Leland Industrial Park. The soils of the site consist of lightly vegetated sandy clay topsoil and grades ranging from 0.5% to 2.0%. Approximately 3 acres will be graded to allow construction of additional buildings on the site with paved parking and paved access. The runoff from the site is estimated using the rational method 10-year design storm and rainfall data for the area. Construction is scheduled to begin as soon as all permits and approvals are obtained. EROSION CONTROL MEASURES: This project was permitted on December 20, 1999 for 5 acres of land disturbance. However, the work was not done .and a new plan has been developed. The attached plans and specifications outline the requirements for erosion control measures. Silt fencing will be provided where stormwater would be expected to sheet flow from disturbed areas directly to adjacent property. Gravel check dams will not be provided unless the Contractor has to temporarily discharge into an open ditch instead of the proposed storm drain outfall. A gravel construction entrance will be constructed at the only entrance. Maintenance will be provided by the grading contractor and developer. STORMWATER MANAGEMENT MEASURES: The project site is located in Brunswick County. The site was permitted on March 2, 2000 as a low -density project with 3.24 acres of allowable impervious area. The new improvements require a high -density solution. As such, a retention pond is being proposed. We are submitting a revised development plan for approval to modify the existing permit. CONSTRUCTION SEQUENCE: The Contractor will install the gravel construction entrance and silt fence prior to beginning any clearing and grading operations. Additional silt fence will be installed when and if conditions warrant during construction. Disturbed areas will be landscaped or seeded upon completion. EROSION CONTROL NOTES AND MAINTENANCE PLAN 1. Install erosion control measures before beginning construction or as soon thereafter as possible. All erosion and sediment control practices will be checked for stability and operation following every runoff producing rainfall but in no case less than once every week. Any needed repairs will be made immediately to maintain all practices as designed. 2. Maintain the gravel construction entrances in a condition to prevent mud or sediment from leaving the construction site. The contractor shall inspect the construction entrances on a daily basis. This will require periodic top dressing with additional No. 4 stone. Any objectionable materials spilled, washed, or tracked onto public roadways shall be removed immediately. 3. Install erosion control measures around the drop inlets as shown on the plans to trap silt during construction. Inspect the erosion control around the inlets after each rain and make repairs immediately. Remove sediment when it becomes 0.50 deep to provide adequate storage volume for subsequent rains. When the contributing drainage area has been adequately stabilized, remove all materials and any unstable soil and either salvage or dispose of it properly. Bring the disturbed area to proper grade and appropriately stabilize all bare areas around the drop inlets. 4. Sediment will be removed from behind the silt fence when it becomes 0.5 feet deep at the fence. The sediment fence will be repaired as necessary to maintain a barrier. Silt fence stakes shall be spaced 6 feet apart unless a wire backing is used with 8 foot stake spacing. 5. Inspect temporary sediment traps / check dams, if required for this project, after each period of significant rainfall. Remove sediment and restore the trap to its original dimensions when the sediment has accumulated to one-half the design depth of the trap. Place the sediment that is removed in the designated disposal area and replace the contaminated part of the gravel facing. Check the structure for damage from erosion or piping. Periodically check the depth of the spillway to ensure it is a minimum of 1.5 ft below the low point of the embankment. Immediately fill any settlement of the embankment to slightly above design grade. Any riprap displaced from the spillway must be replaced immediately. After all sediment -producing areas have been permanently stabilized, remove the structure and all unstable sediment. Smooth the area to blend with the adjoining areas and stabilize properly. 6. The angle for graded slopes and fills shall be no greater than the angle that can be retained by vegetative cover or other adequate erosion -control devices or structures. In any event, slopes left exposed will, within 21 calendar days of completion of any phase of grading, be planted or otherwise provided with temporary or permanent ground cover, devices, or structures sufficient to restrain erosion. T All disturbed areas shall be seeded within 15- days of disturbance. All seeded areas will be fertilized, reseeded as necessary and mulched according to specifications in the vegetative plan to maintain a vigorous, dense vegetative cover. 8. More stringent measures shall be used to halt erosion if those shown on this plan are not effective. 9. All erosion shall be controlled including side slopes before the project is completed. 10. Remove temporary measures upon completion of project. All permanent measures will be well established before project closeout. SECTION 02920 SOIL EROSION AND SEDIMENTATION CONTROL 1. GENERAL 1.1 Contractor shall take every reasonable precaution throughout construction to prevent the erosion of soil and the sedimentation of streams, lakes, reservoirs, other water impoundments, ground surfaces, or other property as required by State and Local regulations. 1.2 The Contractor shall install all required silt fences, and construction entrances at the initiation of work, and have these measures reviewed and approved by the local permit authority prior to clearing and grading operations. 1.3 The Contractor shall, within 15 days of suspension or completion of land disturbing activities, provide permanent protective covering for disturbed areas. Temporary and permanent erosion control measures shall be coordinated to assure economical, effective, and continuous erosion and siltation control throughout the construction and post -construction period. Use the specified seed for both temporary and permanent seeding. 2. PRODUCTS 2.1 Asphalt for anchoring mulch shall be Type SS-1 Emulsion. 2.2 Fertilizer shall be 10-10-10 grade or equivalent. 2.3 Lime shall be dolomitic agricultural ground limestone containing not less than 10 percent magnesium oxide. 2.4 Mulch shall be small grain straw, hay, wood chips, asphalt emulsion, jute or other suitable material free of undesirable weed seed. 2.5 Phosphate shall be 20 percent superphosphate or equivalent. 2.6 Seed shall be 20% carpet grass, 24% Bermuda, 20% turf Fescue, 10% Creeping Red Fescue, and 24% Annual Rye grain. Bermuda seed shall be hulled for warm weather planting and unhulled for cool weather planting. Purity of seed shall be a minimum of 98 percent and germination shall be a minimum of 85 percent. 2.7 Silt fence shall consist of NCDOT Class A fabric supported by wood or metal posts spaced not more than 6 feet on center. The bottom of the fabric shall be buried a minimum of 6 inches. 2.8 Gravel for check dams shall be #57 washed stone. 2.9 Aggregate for construction entrance shall be #4 washed stone. 2.10 Stone rip rap for check dams and erosion control shall be NCDOT Class A or B as shown. 3. EXECUTION 3.1 General: Take every practicable measure during construction or suspension to work to minimize erosion and siltation. Measures should include good construction practices, temporary physical barriers to sediment travel, settling basins for new ditches, and establishment of vegetative cover. 3.2 Construction Practices 3.2.1 Avoid dumping soil or sediment into any wetland or watercourse. 3.2.2 Maintain an undisturbed vegetative buffer where possible between a natural watercourse and trenching and grading operations. 3.2.3 Avoid equipment crossings of streams, creeks, and ditches where practicable. 3.2.4 Grade all cut, fill and ditch slopes to minimum slope of 3:1, unless otherwise shown or directed. 3.3 Temporary Physical Barriers are required where sedimentation on off site property or excessive erosion is a problem. 3.3.1 Mulch shall be used for temporary stabilization of areas subject to excessive erosion and for protection of seedbeds after planting where required. 1. Apply grain straw and hay at a rate of 75 to 100 pounds per 1000 square feet and wood chips at a rate of 500 pounds per 1000 square feet. Jute and mesh should be installed as per manufacturer's instructions. 2. Asphalt emulsion for slope stabilization should be applied at a rate of 1,000 gallons per acre. Asphalt emulsion used for anchoring straw should be applied at a rate of 150 gallons per ton of straw. 3.3.2 Silt Fences shall be used at the base of slopes to restrict movement of sediment from the site. Clean silt fence of accumulated sediment after each rainfall event or when it exceeds a depth of 0.5 feet above natural grade. 3.3.3 Stone Check Dams, placed at the discharges of creeks, ditches, and swales, shall consist of Class A or Class B erosion control stone at minimum two feet high and three feet thick across the watercourse, with a one foot thick layer of gravel on upstream side. Remove sediment if accumulated to a depth of 1.0 feet at upstream face. 3.4 Vegetative Cover: Establish and maintain permanent vegetative cover on all unpaved areas disturbed by the work. 3.4.1 Preparation of Seedbed: Areas to be seeded shall be scarified to a depth of 4 inches and until a firm, well pulverized, uniform seedbed is prepared. Lime, phosphorous and fertilizer shall be applied during the scarification process in accordance with the following rates: Lime: 45 pounds per 1000 square feet Phosphorous: 20 pounds per 1000 square feet Fertilizer: 17 pounds per 1000 square feet 3.4.2 Seeding: Disturbed areas shall be seeded with 2 to 3 pounds per 1000 square feet of the specified seed mixture. Seed shall be worked into the bed to a depth of 1/4 inch. Regrade and seed eroded areas immediately 3.4.3 Mulch all areas immediately after seeding. Mulch shall be applied and anchored as specified hereinbefore. Reapply as necessary to retain cover until grass is established. 3.5 Construction Entrance: Provide an aggregate drive, 20 feet wide by 50 feet long by 6 inches thick at each entrance to the site used by construction vehicles, until such time as the permanent roadway is constructed. Remove soil if accumulated to a depth greater than 0.5 inches. 3.6 Maintenance: The Owner and Contractor shall be responsible for maintaining all temporary and permanent erosion control measures. Temporary structures shall be maintained until such time as vegetation is firmly established in the area protected by the structure. Permanent streambank protection and grassed areas shall be maintained until completion of the project. Areas that fail to show a suitable stand of grass or which are damaged by erosion shall be immediately repaired. END OF SECTION V/26/2006 FRI 11:33 FAX 910 343 9604 Norris, Kuske, 'runstall WJUUtiUUU vc�. 0`. Q.I� d a.�c • u DENR - North Carolina Department of Environment and Natural Resources I 127 Cardinal Drive, Wilmington NC 28405 (910) 796-7215 FAX (910) 350-2004 NKT #06066 Request for Express Permit Review ,a FILL-IN all information below and CHECK required Permit(s). FAX or email to Cameron. Weaverftcmal/.net along with a narrative and vicinity maa of the project location. Projects must be submitted by 9:00 A.M. of the review date, unless prior arrangements are made. APPLICANT Name Charles D. Dean Jr. President Company Dean Hardwoods Inc. Address P.O. Box 1595 CitylState Wilmington. NC Zip 28402-1595 County New Hanover Phone 910-763-5409 Fax 910-763-3748 Email NIA PROJECT Name Dean Hardwoods &D Leland (Old CTP Carrera, Inc. SW8 970531 PROJECT SYSTEM(S) TRIBUTARY TO UT ROWEL PRANCH (STREAM NAME) Cape Fear RIVER BASIN ENGINEERICONSULTANT J. Phillip Norris P E Company Norris Kuske 8 Tunstail Consulting EngineersInc Address 902 Market Street City/State Wilmington, NC Zip 28401 County New Hanover Phone 910-343-9653 Fax 910-343-9604 Email gnorris(&_nktengcom State or National Environmental Policv Act (SEPA. NEPA) - EA or EIS Required ❑ Yes Z No ❑ STREAM ORIGIN Determination; # of stream calls; Stream Name ® STORNWATER ® Low Density ❑ High Density -Detention Pond ❑ High Density -Other Wetlands MUST be addressed below ❑ Low Density -Curb & Gutter ❑ High Density -Infiltration ❑ Off Site [] COASTAL ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information MANAGEMENT ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront ® LAND QUALITY ® Erosion and Sedimentation Control Plan with 3 acres to be disturbed. WETLANDS (401) Wetlands on Property ❑ Yes ® No Isolated Wetlands on Property ❑ yes ® No Check all that gpAl / Wetlands Will Be impacted ❑ Yes Eg No Wetland Impacts: Acre(s) Wetlands Delineation has been completed ❑ Yes ❑ No ❑ Buffers Impacted: Acres) USACOE Approval of Delineation completed ❑ Yes ❑ No 404 Application in process w1USACOE ❑Yes [-]No I Permit received from USACE ❑Yes ❑No 401 Application required []Yes ❑ No If Yes, ❑ Regular ❑ Express Additional fees, not to exceed 50% of the original Express Review permit application fee, may be charged for subsequent reviews due to the insufficiency of the permit applications. For DENR use only SUBMITTAL Dr-b- TEA: Fee Split for multiple permits: SW � $ CAMA $ LOS $ 401 , Total Fee Amount $ 06%26 2006 FRI 11:35 FAX 910 343 9604 Norris, Kuske, Tunstall 4009/001 05/26/2006 FRI 11:33 FAX 910 343 9604 Norris, Kuske, Tunstall 4003/009 NARRATIVE DESCRIPTION: The project site is an existing developed 11 acre tract located in the Leland Industrial Park. The soils of the site consist of lightly vegetated sandy clay topsoil and grades ranging from 0.5% to 2.0%. Approximately 3 acres will be graded to allow construction of additional buildings on the site with paved parking and paved access. The runoff from the site is estimated using the rational method 10-year design storm and rainfall data for the area. Construction is scheduled to begin as soon as all permits and approvals are obtained. EROSION CONTROL MEASURES: This project was permitted on December 20, 1999 for 5 acres of land disturbance. However, the work was not done and a new plan has been developed. The attached plans and specifications outline the requirements for erosion control measures. Silt fencing will be provided where stormwater would be expected to sheet flow from disturbed areas directly to adjacent property_ Gravel check dams will not be provided unless the Contractor has to temporarily discharge into an open ditch instead of the proposed storm drain outfall. A gravel construction entrance will be constructed at the only entrance. Maintenance will be provided by the grading contractor and developer. STORMWATER MANAGEMENT MEASURES: The project site is located in Brunswick County. The site was permitted on March 2, 2000 as a low -density project with 3.24 acres of allowable impervious area. This project falls within the permitted amount. We are submitting a revised development plan for approval. CONSTRUCTION SEQUENCE: The Contractor will install the gravel construction entrance and silt fence prior to beginning any clearing and grading operations. Additional silt fence will be installed when and if conditions warrant during construction. Disturbed areas will be landscaped or seeded upon completion. 06!261`2006 FR1 11:33 FAX 910 343 9604 Norris, Kuske, Tunstall 004i00R EROSION CONTROL NOTES AND MAINTENANCE PLAN Install erosion control measures before beginning construction or ' as soon thereafter as possible. All erosion and sediment control practices will be checked for stability and operation following every runoff -producing rainfall but in no case less than once every week. Any needed repairs will be made immediately to maintain all practices as designed. 2. Maintain the gravel construction entrances in a condition to prevent mud or sediment from leaving the construction site_ The contractor shall inspect the construction entrances on a daily basis. This will require periodic top dressing with additional No. 4 stone_ Any objectionable materials spilled, washed, or tracked onto public roadways shall be removed immediately. 3. Install erosion control measures around the drop inlets as shown on the plans to trap silt during construction. Inspect the erosion control around the inlets after each rain and make repairs immediately. Remove sediment when it becomes 0.50 deep to provide adequate storage volume for subsequent rains. When the contributing drainage area has been adequately stabilized, remove all materials and any unstable soil and either salvage or dispose of it properly. Bring the disturbed area to proper grade and appropriately stabilize all bare areas around the drop inlets. 4. Sediment will be removed from behind the silt fence when it becomes 0.5 feet deep at the fence. The sediment fence will be repaired as necessary to maintain a barrier. Silt fence stakes shall be spaced 6 feet apart unless a wire backing is used with 8 foot stake spacing. 5. Inspect temporary sediment traps / check dams, if required for this project, after each period of significant rainfall. Remove sediment and restore the trap to its original dimensions when the sediment has accumulated to one-half the design depth of the trap. Place the sediment that is removed in the designated disposal area and replace the contaminated part of the gravel facing. Check the structure for damage from erosion or piping. Periodically check the depth of the spillway to ensure it is a minimum of 1.5 ft below the low point of the embankment. Immediately fill any settlement of the embankment to slightly above design grade. Any riprap displaced from the spillway must be replaced immediately. After all sediment -producing areas have been permanently stabilized, remove the structure and all unstable sediment. Smooth the area to blend with the adjoining areas and stabilize properly. 6. The angle for graded slopes and fills shall be no greater than the angle that can be retained by vegetative cover or other adequate erosion -control devices or structures. In any event, slopes left exposed will, within 21 calendar days of completion of any phase of grading, be planted or otherwise provided with vl cal LUDO rAl 11. J'i rAA VIV J`!J 3UU't 1'N! 1 10, fluanu, luliouall temporary or permanent ground cover, devices, or structures sufficient to restrain erosion. 7. All disturbed areas shall be seeded within 15 days of disturbance. All seeded areas will be fertilized, reseeded as necessary and mulched according to specifications in the vegetative plan to maintain a vigorous, dense vegetative cover. 8. More stringent measures shall be used to halt erosion if those shown on this plan are not effective. 9. All erosion shall be controlled including side slopes before the project is completed. 10. Remove temporary measures upon completion of project. All permanent measures will be well established before project closeout. uu- Lu,, 4UUu rhi 11 . ii l AA 01V Old JVVY :1UI I lJ, fluor'" Aug uv"_k� SECTION 02920 SOIL EROSION AND SEDIMENTATION CONTROL 1, GENERAL 1.1 Contractor shall take every reasonable precaution throughout construction to prevent the erosion of soil and the sedimentation of streams, lakes, reservoirs, other water impoundments, ground surfaces, or other property as required by State and Local regulations. 1.2 The Contractor shall install all required silt fences, and construction entrances at the initiation of work, and have these measures reviewed and approved by the local permit authority prior to clearing and grading operations. 1.3 The Contractor shall, within 1 disturbing activities, provide permane Temporary and permanent erosion cor economical, effective, and continuous construction and post -construction period permanent seeding. 2. PRODUCTS days of suspension or completion of land it protective covering for disturbed areas. rol measures shall be coordinated to assure erosion and siltation control throughout the Use the specified seed for both temporary and 2.1 Asphalt for anchoring mulch shall be Type SS-1 Emulsion. 2.2 Fertilizer shall be 10-10-10 grade or equivalent. 2.3 Lime shall be dolomitic agricultural ground limestone containing not less than 10 percent magnesium oxide. 2.4 Mulch shall be small grain straw, hay, wood chips, asphalt emulsion, jute or other suitable material free of undesirable weed seed. 2.5 Phosphate shall be 20 percent superphosphate or equivalent. 2.6 Seed shall be 20% carpet grass, 24% Bermuda, 20% turf Fescue, 10% Creeping Red Fescue, and 24% Annual Rye grain. Bermuda seed shall be hulled for warm weather planting and unhulled for cool weather planting. Purity of seed shall be a minimum of 98 percent and germination shall be a minimum of 85 percent. 2.7 Silt fence shall consist of NCDOT Class A fabric supported by wood or metal posts spaced not more than 6 feet on center. The bottom of the fabric shall be buried a minimum of 6 inches_ 2.8 Gravel for check dams shall be #57 washed stone. U0, LU/ LUUU PAl 11.04 Y11R 01.V JYJ 0 U V I !IVI110, lluanx,, 1LL11C7 t U.L.L =-11 2.9 Aggregate for construction entrance shall be #4 washed stone. 2. t 0 Stone rip rap for check dams and erosion control shall be NCDOT Class A or B as shown. 3. EXECUTION 3.1 General: Take, every practicable measure during construction or suspension to work to minimize erosion and siltation. Measures should include good construction practices, temporary physical barriers to sediment travel, settling basins for new ditches, and establishment of vegetative cover. 3.2 Construction Practices 3.2.1 Avoid dumping soil or sediment into any wetland or watercourse. 3.2.2 Maintain an undisturbed vegetative buffer where possible between a natural watercourse and trenching and grading operations. 3.2.3 Avoid equipment crossings of streams, creeks, and ditches where practicable- 3-2-4 Grade all cut, fill and ditch slopes to minimum slope of 3:1, unless otherwise shown or directed. 3.3 Temporary Physical Barriers are required where sedimentation on off site property or excessive erosion is a problem. 3.3.1 Mulch shall be used for temporary stabilization of areas subject to excessive erosion and for protection of seedbeds after planting where required. 1. Apply grain straw and hay at a rate of 75 to 100 pounds per 1000 square feet and wood chips at a rate of 500 pounds per 1000 square feet. Jute and mesh should be installed as per manufacturer's instructions. 2. Asphalt emulsion for slope stabilization should be applied at a rate of 1,000 gallons per acre. Asphalt emulsion used for anchoring straw should be applied at a rate of 150 gallons per ton of straw_ 3.3.2 Silt Fences shall be used at the base of slopes to restrict movement of sediment from the site. Clean silt fence of accumulated sediment after each rainfall event or when it exceeds a depth of 0.5 feet above natural grade. 3.3.3 Stone Check Dams, placed at the discharges of creeks, ditches, and swales, shall consist of Class A or Class B erosion control stone at minimum two feet high and uJ' Lu; Luvu rill 11. j4 1 .1,1 al v'tv luv, .w11 la, 11-11— lullo%—L three feet thick across the watercourse, with a one foot thick layer of gravel on upstream side. Remove sediment if accumulated to a depth of 1.0 feet at upstream face. 3.4 Vegetative Cover: Establish and maintain permanent vegetative cover on all unpaved areas disturbed by the work. 3.4.1 Preparation of Seedbed: Areas to be seeded shall be scarified to a depth of 4 inches and until a firm, well pulverized, uniform seedbed is prepared. Lime, phosphorous and fertilizer shall be applied during the scarification process in accordance with the following rates: Lime: 45 pounds per 1000 square feet Phosphorous: 20 pounds per 1000 square feet Fertilizer: 17 pounds per 1000 square feet 3.4.2 Seeding: Disturbed areas shall be seeded with 2 to 3 pounds per 1000 square feet of the specified seed mixture. Seed shall be worked into the bed to a depth of 1/4 inch. Regrade and seed eroded areas immediately 3.4.3 Mulch all areas immediately after seeding. Mulch shall be applied and anchored as specified hereinbefore. Reapply as necessary to retain cover until grass is established. 3.5 Construction Entrance: Provide an aggregate drive, 20 feet wide by 50 feet long by 6 inches thick at each entrance to the site used by construction vehicles, until such time as the permanent roadway is constructed_ Remove soil if accumulated to a depth greater than 0.5 inches. 3.6 Maintenance: The Owner and Contractor shall be responsible for maintaining all temporary and permanent erosion control measures. Temporary structures shall be maintained until such time as vegetation is firmly established in the area protected by the structure. Permanent streambank protection and grassed areas shall be maintained until completion of the project. Areas that fail to show a suitable stand of grass or which are damaged by erosion shall be immediately repaired. END OF SECTION J </ LO/ L000 rRI 11. JJ rAA UIU 010 JUVI lul 113. 11u.3nc, luliauull yj­ ­ STORMWATER SYSTEM & EROSION CONTROL NARRATIVE DEAN HARDWOODS @ LELAND LELAND, NORTH CAROLINA For Dean Hardwoods, Inc. P.O. Box 1595 Wilmington, NC 28402-1595 (910) 763-5409 May 2006 Prepared by: NORRIS, KUSKE & TUNS -TALL CONSULTING ENGINEERS, INC. 902 Market Street Wilmington, North Carolina 28401 (910) 343-9653 (910) 343-9604 (Fax) E-mail: officeQnkteng.com NKT Project No. 06066 NORRIS, KUSKE &TUNSTALL CONSULTING ENGINEERS, INC. July 3, 2006 Ms. Linda Lewis NC DENR Division of Water Quality Water Quality Section 127 Cardinal Drive Extension Wilmington, NC 28405-3845 Re: Dean Hardwoods @ Leland SW8 970531 Modification Request for Additional Information NKT Project No. 06066 Dear Ms. Lewis: J. Phillip Norris, P.E. John A. Kuske, III, P.E. John S. Tunstall, P.E. J.A. Kuske, P.E. of Counsel 010 es31 N� We are responding to your comments of June 22, 2006 regarding the subject project as follows: 1. As with the original permit, both properties were owned by CPT Carrera, Inc. They are both now owned by Dean Hardwoods. As such, the pond is located on the applicant's property. 2. The new pavement on the east side of the property will be collected in a swale leading to the new 15 inch storm drain. The other areas all drain to catch basins, which lead to the pond. 3. A note has been added regarding roof drainage. 4. Notes have been added regarding removal of existing pipes. 5. A 3:1 length to width ratio has been provided. We are enclosing two (2) sets of revised plans, one (1) copy of revised calculations and one (1) copy of the revised supplement form (SWU-102, Page 1 of 4) for your continued review and approval. Please contact us if you have any further questions or comments. Thank you for your assistance on this project. Sincerely, NORRIS, KUSKE $ TUNSTALL CONSU G ENGINEERS NC. {;� JUL 0 5 2006 Phillip Norris, E. J PN/asn 06066 07-03-06-s-sw response-itr cc: Charles Dean, Jr. (w/ 1 Copy of All) George Alsina / George Alsina Architects (w/ 1 Copy of All) 902 Market Street • Wilmington, NC 28401-4733 0 Phone: 910.343.9653 • Fax: 910.343.9604