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HomeMy WebLinkAboutSW8980611_Historical File_19980911State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office James B. Hunt, Jr., Governor Wayne McDevitt, Secretary Division of Water Quality Mr. John Lancaster, Vice President 2M Development, Inc. 1410 Commonwealth Drive, Suite 200 Wilmington, NC 28403 Dear Mr. Lancaster: t 7dPA NCDEN NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES September 11, 1998 Subject: Permit No. SW8 980611 NorthChase Spec Building High Density Commercial Stormwater Project New Hanover County The Wilmington Regional Office received the Stormwater Management Permit Application for NorthChase Spec Building on June 5, 1998, with final information on August 13, 1995. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 980611 dated September 11, 1998, for the construction of NorthChase Spec Building. This permit shall be effective from the date of issuance until September 11, 2008, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.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) 395-3900. Sincerely, Rick Shiver Water Quality Regional Supervisor RSS/arl: S:IWQSISTORMWATIPERMIT,980611.SEP cc: John Kuske Tony Roberts, New Hanover County Inspections Beth Easley, New Hanover County Engineering Linda Lewis Wilmington Regional Office Central Files 127 Cardinal Dr. Ext., Wilmington, North Carolina.28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper State Stormwater Management Systems Permit No. SW8 980611 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 2M Development, Inc. NorthChase Spec Building New Hanover County FOR THE construction, operation and maintenance of a 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 September 11, 2008 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 179,500 square feet of impervious area. This pond is designed to be operated with a vegetated filter. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 5. All runoff from the built -upon area on +re project, including Phase II, riiast be directed into the permitted stormwater control system. State Stormwater Management Systems Permit No. SW8 98 611 DIVISION OF WATER QUALITY PROJECT DATA SHEET Project Name: NorthChase Spec Building Permit Number: 980611 Location: New Hanover County Applicant: Mr. John Lancaster, Vice President Mailing Address: 2M Development, Inc. 1410 Commonwealth Drive, Suite 200 Wilmington, NC 28403 Application Date: June 5, 1998 Water Body Receiving Stormwater Runoff: Smith Creek Classification of Water Body: "C Sw" If Class SA, chloride sampling results: n/a Pond Depth, feet: 4 Permanent Pool Elevation, FMSL: 29.5 Total Impervious Surfaces, ft2: 179,500 (includes Phase II) Future (Phase II), ft2 62,300 Offsite Area entering Pond, ft2: n/a Required Surface Area, ft2: 15,635 Provided Surface Area, ft2: 21,165 Required Storage Volume, ft3: 15,234 Provided Storage Volume, ft3: 22,654 Temporary Storage Elevation, FMSL: 30.5 Controlling Orifice: 2.5" pipe 3 State Stormwater Management Systems Permit No. SW8 980611 6. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built - upon area. 7. The following items will require a modification to the permit: ` a. Any revision to the approved plans, regardless of size. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area. e. Further subdivision of the project area. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan In addition, the Director may determine that other revisions to the project should require a modification to the permit. 8. 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. H. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in it's entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface except roads. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. All connections into the stormwater system from Phase 11 shall be made such that short-circuiting of the system does not occur. 4. 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 side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping. g. Access to the outlet structure must be available at all times. 5. 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. 6. Decorative spray fountains will not be allowed in the ponds. 7. 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. State Stormwater Management Systems Permit No W8 980611 8. 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 `we Cerdflcation. 9. 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. 10. Prior to the sale of any portion of the property, an access/maintenance easement to the stormwater facilities shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale of any portion of the property. M. GENERAL CONDITIONS 1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, 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. 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. 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) which have 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 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. Permit issued this the I lth day of September, 1998. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION A-) n , A �l A. Preston Howard, Jr., P.E., Director Division of Water_ Quality - By Authority of the Environmental Management Commission Permit Number SW8 980611 State Stormwater Management Systems Permit No. SW8 980611 NorthChase Spec Building Stormwater Permit No. SW8 980611 New Hanover County Engineer's Certification I, , as a duly registered Professional Engineer 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. Noted deviations from approved plans and specification: SEAL Signature Registration Number Date ECErvE 98059 STORMWATER A D�SUN 2 6 199 6 POND MAINTENANCE REQUIREMENTS eRq� # E M Project Name: North Chase Spec Bldg. Project Number: Responsible Party: 2M Development, Inc Phone No 910-256-6151 Address: 1410 Commonwealth Drive, Suite 200 Wilmington, NC 28403 I. Monthly, or after every runoff -producing rainfall event, whichever comes first: A. Inspect the trash rack; remove accumulated debris, repair/replace if it is not functioning. B. Inspect and clear the orifice of any obstructions. If a pump is used as the drawdown mechanism, pump operation will be checked. A log of test runs of the pump will be kept on site and made available to DWQ personnel upon request. C. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas before the next rainfall event. D. If the pond is operated with a vegetated filter, the filter will be checked for sediment accumulation, trash accumulation, erosion and proper operation of the flow spreader mechanism. Repairs/cleaning will be done as necessary. II. Quarterly (Four times a year): A. Inspect the collection system (i.e., catch basins, piping, grassed swales) for proper functioning. Accumulated trash will be cleared from basin grates, basin bottoms, and piping will be checked for obstructions and cleared as required. B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation structures will be replaced, and broken pipes will be repaired. III. Semi-annually (twice a year): A. Accumulated sediment from the bottom of the outlet structure will be removed. B. The forebay depth will be checked at various points. Sediment removal is required when the depth is reduced to 75 % of original design depth of 4.0 feet. C. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as necessary. Repair eroded areas immediately. POND MAINTENANCE REQUIREMENTS PAGE 2 IV. Annually (Once a year): A. The pond depth will be checked at various points. Sediment removal is required when the depth is reduced to 75 % of the original design depth or 3', whichever is greater. Design depth is 4.0 , measured vertically from the orifice down to the pond's bottom. Sediment must be removed to at least the original design depth. V. General: A. Mowing of the side slopes will be accomplished according to the season. Maximum grass height will be 6". B. Cattails are encouraged along the pond perimeter; however, they will be removed when they cover more than 1/2 the surface area of the pond. The best time to cut them is at the end of the growing season, in November. Environmentally sensitive chemicals for use in killing cattails can also be used. Contact your nearest Agricultural Extension Agent. C. The orifice/pump is designed to draw down the pond in 2-5 days. If drawdown is not accomplished in that time, the orifice will be replaced with a larger or smaller orifice. Slow drawdown may be attributed to a clogged system. The source of the clogging will be found and eliminated. D. All components of the detention pond system will be kept in good working order. Repair or replacement components will meet the original design specifications as per the approved stormwater plan. If previously approved components are determined to be ineffective, the component will be redesigned and/or replaced. V. Special Requirements: I, John Lancaster (please print or type name clearly) responsible party for maintenance of this detention pond , hereby acknowledge that I am the financially I will be responsible for the performance of the maintenance as outlined above, as part of the Stormwater Management Permit received for this project. Signature: Revised 2/25/97 Date: C _2, 5,f, A 1-11 "nonen 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 I. Applicants name (specify the name of the corporation, individual, etc. who owns the project): 2M Development, Inc. 2. Print Owner/Signing Official's name and title (the person who is legally responsible for the facility and its compliance): John Lancaster, Vice President 3. Mailing Address for person listed in item 2 above: 1410 Comomonwealth Drive Suite 200 City: _Wilmington State: NC Zip: 28403 Telephone Number: ( 910 ) 256-6151 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): North Chase Spec Building 5. Location of Facility (street address): Located in New Hanover County within the North Chase Park of Commerce (Lot 100) on ..aaaa..u7t 1vVlLLL t..lL4JC Parkway. City: Wilmington County: New Hanover 6. Directions to facility (from nearest major intersection): The site is located approx. 3/4 mile from the intersection of NC 132 and Southeast North Chase Parkway. 7. Latitude: N34018' 20" Longitude: W 770 52' 06" of facility 8. Contact person who can answer questions about the facility: Name: John Lancaster Telephone Number: ( 910 ) 256-6151 II. PERMIT INFORMATION: 1. Specify whether project is (check one): X New Renewal 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 N/A and its issue date(if known) Form SWU-101 April 1998 Page 1 of - 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 Permit III. PROJECT INFORMATION: 1. In the space provided below, summarize how stormwater.will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Stormwater runoff will be treated in a wet detention pond deskarned to achieve 90% TES removal. 2. Stormwater runoff from this project drains to the 3. Total Project Area: 9.76 acres 5 Cape Fear River basin. 4. Project Built Upon Area: 42.21 How many drainage basins does the project have? 1 Complete the following information for each drainage basin. If there are more than two drainage basins in the project, attach an additional sheet with the information for each basin provided in the same format as below. On -site Buildings ase 1 = 75, P ase 2 = On -site Streets 1, inC u eS truc area an On -site Parking Other on -site Total: I E= 179, 412 Ac E *Impervious area :s defined as the built upon area including, but not limited to, areas, sidewalks, gravel areas, etc. 7. How was the off site impervious area listed above derived: N/A IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS Deed restrictions and protective covenants and required to be recorded.for all low density projects and all subdivisions prior to the sale of any lot. Please see AEEichment A for the specific items that must be recorded. Form SWU-1 G 1 April 1998 Pa,e 2 of 4 By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the items required by the permit, 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. AGENT AUTHORIZATION If you wish to designate submittal authority to another individual or firm so that they may provide information on your behalf, please complete this section: John A. Kuske, III Designated agent (individual or firm): Andrew & Kuske Consulting Engineers, Inc Mailing Address: 902 Market Street City: Wilmington State: NC Zip: 28401 Phone: (910 ) 343-9653 Fax: (910 ) 343-9604 VI. SUBMITTAL REQUIREMENTS This application package will not be accepted by the Division of Water Quality unless all of the applicable items are included with the submittal. 1. Please indicate that you have provided the following required information by signing your initials 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 (see Attachment A) • Permit application processing fee (see Attachment A) • Two copies of calculations • 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 — Details of roads, parking, cul-de-sacs, sidewalks, and curb and gutter — Wetlands delineated, or a note on plans that none exist — Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations — Drainage basins delineated — Vegetated buffers (where required) VII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) John Lancaster certify that the information included on this permit application form is correct, that the project will be constructed in conformance with the approved plans, that the deed restrictions in accordance with Attachment A of this form will be recorded 'with all required permit conditions, and that to the best of my knowledge, the proposed project complies with the requirements of 15A NCAC 2H.1000. Signature C - Title: Vie President; Fomi SWU-101 April 1998 Page 3 of 4 Date: y1 ATTACHMENT A I. Deed Restriction Language The following statements must be recorded for all low density projects and for all projects that involve the subdivision and selling of lots or outparcels: 1. No more than square feet o{any lot, including that portion of the right-of-way between the edge of pavement and the front lot Iine, shall be covered by impervious structures including asphalt, gravel, concrete, brick, stone, slate or similar material but not including wood decking or the surface of swimming pools. This covenant is intended to insure continued compliance with the stormwater permit issued by the State of North Carolina. The covenant may not be changed or deleted without the consent of the State. 2. No one may fill in, pipe, or alter any roadside swale except as necessary to provide a minimum driveway crossing. NOTE: If lot sizes vary significantly, the owner, developer must provide an attachment listing each lot number, size and the allowable built -upon area for each lot. For commercial projects that have outparcels or future development the following statements must also be recorded: 3. The connection from the outparcel or future area into the stormwater system must be made into the forebay such that short-circuiting of the system does not occur. 4. All built -upon area from the outparcel or future development must be directed into the permitted stormwater control system. 5. Built -upon area in excess of the permitted amount will require a permit modification prior to construction. For curb outlet systems, the following statements in addition to items 1 and 2 above must be recorded: 6. No one may pipe, fill in or alter any designated 100 foot long grassed swale used to meet the requirements of NCAC 2H .1008(g). 2. Supplement Forms The applicable supplement form(s) listed below must be submitted for each BMP specified for this project: Form SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Nutrient Management Strategy Supplement 3. Permit Application Fees (Check made payable to NCDENR and submitted to the appropriate Regional Office) Type of Permit Low Density High Density Other Director's Certification General Permit New, Modification, or Late Renewal $225 $385 $225 $350 $50 Timely Renewal Without Modification -n/a $225 n/a n/a n/a Form SWU-101 April 1998 Page 4 of Permit No.',l^: Q (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 fully executed operation and maintenance agreement. I. PROJECT INFORMATION (please complete the following information): Project Name: North Chase Spec Building Contact Person: John Lancaster Phone Number: ( 910 ) 256-6151 For projects with multiple basins, specify which basin this worksheet applies to Basin Bottom Elevation 25.50 ft. (average elevation of the floor of the basin Permanent Pool Elevation 29.50 ft. (elevation of the orifice) Temporary Pool Elevation 30.50 ft. (Elevation of the discharge structure overflow Permanent Pool Surface Area 21 165 s ft (wat f Drainage Area Impervious Area Permanent Pool Volume Temporary Pool Volume Forebay Volume SA/DA I Diameter of Orifice q. • er sur ace area at the orifice elevation) 9.76 ac. (on -site and off -site drainage to the basin) 4.12 ac. (on -site and off -site drainage to the basin) 54,537 cu. ft. (combined volume of main basin and forebay) 2"''S ,Q4(� cu. ft. (volume detained above the permanent pool) No. 1=7640 cu. ft. No. 2 =4600 Required SA = 15,632 SF; Provided SA = 21,165 SF 3.6768 (surface area to drainage area ratio) 2.5 in. Design TSS Removal 90 II. REQUIRED ITEMS CHECKLIST (85 % TSS removal required, see item k below) The following checklist outlines design requirements per the Stormwater Best Management Practices manual (NC Department of Environment, Health and Natural Resources, November 1995) and Administrative Code erection: 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. Form SWLJ-101 January 1998 Page I oft Applicants Initials iffy a. The temporary pool controls runoff from the 1 inch storm event. b. The basin length to width ratio is greater than 3:1. ` c. The basin side slopes above the permanent pool are no steeper than 3:1. d. A submerged and vegetated perimeter shelf at less than 6:1 is provided (show detail). e. Vegetation above the permanent pool elevation is specified. f. An emergency drain is provided to empty the basin. g. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). PWC;i� h. The temporary pool draws down is 2 to 5 days. i. A trash rack is provided for both the overflow and orifice. j. The forebay volume is approximately equal to 20% of the total basin volume. k. Sediment storage is provided in the permanent pool. /t//,t 1. 30-foot vegetative filter is provided at the outlet2 (include erosive flow calculations m. Recorded drainage easement for each basin including access to nearest right-of-way. n. A site specific operation and maintenance (O&M) plan is provided. o. A vegetation management/mowing schedule is provided in the O&M plan. ,PPL-i�_ p. Semi-annual inspections are specified in the O&M plan. q. A debris check to be performed after every storm event is specified in the O&M plan. ,i r. Specific clean -out benchmarks are specified in the O&M plan (elevation or depth). s. A legally responsible party is designated in the O&M plan3 (include name and title). 1_7�_ t. 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 'When using the Division SA/DA table, 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. 2The requirement for a vegetative filter may be waived if the wet detention basin is designed to meet 90% TSS removal. 3The legally responsible parry should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. Form SWTU-102 January 1998 Page 2 of 2 Andrew & Kuske CONSULTING ENGINEERS, INC. John R. Andrew, P.E. J.A. Kuske, P.E. J. Phillip Norris, P.E. 902 Market St.. Wilmington, North Carolina 28401-4733 • Telephone 910/343-9653 • Fax 910/343-9604 August 12, 1998 Ms. Linda Lewis, Environmental Engineer NC DEHNR - Division of Environmental Management 127 Cardinal Drive Extension Wilmington, NC 28045-3845 Re: North Chase Spec Building New Hanover County, NC Revised Stormwater Submittal D.E.M. Project No. SW8 980611 A&K No. 98059 Dear Ms. Lewis: STORMWATER E� rAUG 131998 � D E M PROJ # We are in receipt of your August 3, 1998 correspondence. Enclosed is two sets of revised plans and revised calculations for your approval. We offer the following in response to your comments. 1. The outlet structure has been relocated to the center of the pond per your request. 2. The required pond volume has been recalculated per your request. The revised required volume is 19,053 ft3. Please note that this is less than the pond storage volume provided. 3. The Owner is aware that more frequent sediment removal will be necessary to keep the pond at the design depth of 4 feet. 4. The surface area calculation at elevation 30.50 has been revised. The new surface area at elevation 30.50 is approximately 24,142 square feet. Per our conversation, this does not include the surface area encompassed by elevation 30.50 in the proposed swale at the north end of the pond. The pond section details have been revised to reflect a 4:1 scope. The draw down orifice calculation has also been revised. However, a 2.5 inch inner diameter orifice is still adequate. Please review this information for approval and contact us with any questions or comments you may have. Sincerely, ANDREW & KUSKE CONSULTING ENGINEERS, INC. John A. Kuske, III, Project Engineer JAKI Illams enclosures cc: Dick Hurst/Miller Building Corporation 98059-2.doc Date Design Andrew and Kuske Fet 902 Market St. CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401 Of Che Job fjpj-� For �/0,�77/ C/f�.JE Y�Job No. / �ac�1H/�C �lt.c vc�S�r SPE c l�r�i�,o i..iG R STi�7� ST r��/rlTZ� C�TGGyC�J7�/J" yo.ert/ cf/�E s�Ec dvi�o /�� i✓E�/ .�?�/m vE� co v�/i'�7 J ��/'L oTORMWATER E C E I V E AUG 131998 D D E M PROJ # Date Design Andrew and Kuske Sheet 902 Market St. CONSULTING ENGINEERS, INC. 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S� _ vtcia S� Z VC)C = 4600 "C'7- S Mac Tip+ E PHASE 2 BUILDING EXPANSION ® d . ,m dmo w�xaxoN Project Engineer: c:%haestad\stmc\north ch.stm StormCAD v1.0 0624M 01:43:19 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 STo.��"'!G✓�1�/� Pi�.� C�yL GvC?T��/.f' �NaeTif En/o Pipe -Node- Upstream Downstream Inlet Area (acres) Inlet CA (acres) Total CA (acres) -Ground- Upstream Downstream (ft) -HGL- Upstream Downstream (ft) -Slope- Energy Constructed (ftfit) -Section- Discharge Capacity (cfs) -Section- Shape Size Length (ft) Average Velocity (ft/s) Description P-1 1-1 0.54 0.30 0.39 33.00 32.03 0.001916 2.83 Circular 177.00 2.30 1-2 32.80 31.69 0.001977 2.87 15 inch P-2 1-2 0.63 0.37 0.76 32.80 31.69 0.002521 5.36 Circular 255.00 3.45 1-3 32.80 31.00 0.001961 4.65 18 inch P-3 1-3 0.22 0.16 0.92 32.80 31.00 0.001909 6.26 Circular 78.00 3.33 1-4 33.50 30.85 0.002051 10.25 24 inch P-8 1-4 0.13 0.12 1.03 33.50 30.86 0.002799 6.98 Circular 84.00 4.25 Outlet 33.00 30.47 0.0019051 9.87 24 inch Project Title: NORTH CHASE SPEC Project Engineer: c:\haestad�stmclnorth ch.stm StomiCAD 0.0 0W4G8 08:18:18 AM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 of 1 Pipe -Node- Inlet Inlet Total -Ground- -HGL- -Slope- -Section- -Section- Length Average Description Upstream Area CA CA Upstream Upstream Energy Discharge Shape (ft) Velocity Downstream (acres) (acres) (acres) Downstream Downstream Constructed Capacity Size We) (ft) (ft) (ftift) (cfs) P-1 I-? 0.? 7 0.15 0.15 33.50 31. i 7 0.004603 1.12 Circular 161.00 2.62 1-2 33.50 30.48 0.004783 7.26 18 inch P-2 1-2 0.09 0.08 0.23 33.50 30.48 0.005556 1.66 Circular 90.00 3.36 outlet 1 33.00 29.98 0.005556 7.83 18 inch Pro)ect Engineer. c:lhaestaMstmc%north ch.stm StormCAD v1 0 06/24GS 01:42:28 PM C Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 05706 USA (203) 755-1666 Page 1 of 1 ,sh/�JG„E CHGG vcTT a�-r` Cit/oeTiy .E.✓�J Worksheet Worksheet for Triangular Channel Project Description Project File 0haestadlfmwlnorth ch.fm2 Worksheet NORTH CHASE NORTH SWALE Flow Element Triangular Channel Method Manning's Formula Solve For Channel Depth Input Data Mannings Coefficient 0.030 Channel Slope 0.008600 ftlft Left Side Slope 5.000000 H : V Right Side Slope 5.000000 H : V Discharge 5.23 cfs Results Depth 0.69 ft Flow Area 2.35 ft2 Wetted Perimeter 7.00 ft Top Width 6.86 ft Critical Depth 0.58 It Critical Slope 0.020291 ft/ft Velocity 2.22 ft/s Velocity Head 0.08 ft Specific Energy 0.76 ft Froude Number 0.67 Flow is subcrfical. 0&24% F!"w•trAasiai il& 13 02:03:49 PM Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-16W Page 1 of 1 sh✓i9�.E G�G.GdG iTlio�/1` �.So c/T7� E�/O, Worksheet Worksheet for Triangular Channel Project Description Project File c:lhaestadlfmwlnorth ch.fm2 Worksheet NORTH CHASE SOUTH SWALE Flow Element Triangular Channel Method Manning's Formula Solve For Channel Depth Input Data Mannings Coefficient 0.030 Channel Slope 0.000100 ft/ft Left Side Slope 3.000000 H : V Right Side Slope 3.000000 H : V Discharge 2.24 cfs Results Depth 1.41 ft Flow Area 5.93 ft2 Wetted Perimeter 8.89 It Top Width 8.43 ft Critical Depth 0.51 ft Critical Slope 0.022179 ft(ft Velocity 0.38 ft/s Velocity Head 0.22e-2 ft Specific Energy 1.41 ft Froude Number 0.08 Flow is subcritical. 0a24rJ8 FlowMaster v5.13 02:16:12 PM Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666 Page 1 of 1 Date S/z��B� Design Andrew and Kuske Sheet 902 Market St, CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401 /ZOf Check Job For �, C J-E Job No. .S�.�rwvl7r2 GT��e�l'J�rn{f SPEC /3v/La /NG 9SdS9 /✓6�77t /JoNO /NGE T P/00E ,D = Z 4 " /Z ' .ec,o s,4 1/' = ¢. P/G Zc.VE Z : /-/ = a ) = to / Lz = z) = / z !/SE 30 'X /X /.S- ii ,ENE�c y /✓0 Do T c c ass B E.� o.�-ic„�i c o�✓ �-�oc sib/,E /✓OTC' : D/.T.i/O�ITb/� A,I/G L -Aw- .SEs�i/G/ENT' Fp/t 77� P/•�E �fjVO-TvilLE, S�i9GE .oe2.0it/a Z D = /B "/ /' .r-' .eea sd = Lz = e1964 sj = /�/c a o T G G �yS1' � E/LoJ'i off/ G av�/TXCaG STbi�/E Date Design Andrew and Kuske [Sheet 902 Market St, CONSULTING ENGINEERS, INC. �/ilmington, N,C. 28401 3 Of A'> Check Job For �� -,—/G�5,�1J'E Job No. STL�[ �! �?T.i'� C /Jz 4 vc.4W) SPEG Q �/iG.0 /�.� '780S 1 2g �i /Z /eCP SQ �C 7, zrJ(z. 6 ¢ J V = /9.08_ 3. / 4- fi 4— .9 = Tr CZJ Z 4- LJC z.) _ /z /1/C .Od T L' G.l.f.T Q Edo J'/oN G oNT.�o L Sl�Vt/E ,'90/✓Q OC JTL E T eLl/AfE " / /. S' c.d so Q= 3 Z Cif' _ A 77 fT 2 V V = 3z /. 77 V = / e, a C/.fE /o ' X /S -1 K '0S" EivE�F p/,!'J/�?Jb •C /VG GL'-f'fS B ,E/ZoS/o�/ Gc;,^ /, nC.ae SJati� V z Z p L LI a' N C , Z > 0 V , y LL 00 LL Z Z �- o W Z LIJ V3 L.lI -- O � rd • n • � t � n • •3 <OL 1 w —t IN I a ' C �� O _` • a ti �-C C C �i • iia • 7 •� •��_ 9'• 3P o• - E �� a aa�� Es o��tt > y > O u d 6: a to l_ n A n C4 n n Or Y Or • D, • Nf en N Q r4 a c a n c c 0 =+ M -i f ■ 71 ■ a w G tL a + to 0 o O ev U_ O O al O O O a O < • G 9 O O a �_� S P • O• " 6. J v v `. • 21,c Y P O OI O P P 7_ S S . _ Z � � L 1` � L • O C P �✓ C < < u 0 IL O G D < N V7 VI VI 41 VI VI O -NOZ I-IC41111-ITI- 1 1 I 1 1 I 1 1 1 1 1 1 1 1 1 1 1 1 1 i _-J-- --J--- - -- -- -- 1 1 I 1 1 1 1 1 1 1 1 ^ •� 1 1 1 1 I 1 ( I 1 1 1 1 1 •' 1 1 t I 1 1 1 I 1 L 1 1 t 1 I 1 1 1 I ! t 1 1 1 1 1 t 1 a t 1 1 1 • 1 I 1 1 O to O U-) r- 'S 'd 'd N I A H- 15 -9.43 L O i4/.s z 0 N ~ W U C O C W to W Z U u O C Z U z z v J C .J u 0 z Q O = V) U � 0 0 C N � x O z � r © z LLJ U C O N NORTH CAROLINA DEPARTMENT OF TRANSPORTATION /S//.S-- RALEIGH STANDARD SPECIFICATIONS FOR ROADS AND)TRUCTURES SECTION 942 t RIP RAP MATERIALS 942-1 PLAIN RIP RAP. Stone for plain rip rap shall consist of field stone or rough unhewn quarry stone. The stone shall be sound. tough. dense. resistant to the action of air and water. and suitable in all other respects for the pur. pose intended. Where broken concrete from demolished structures or pavement is availahle. it may lie used in place of stone provided that such use r►evts with the approval of the Engineer. However. the use of broken concrete which contains reinforcing steel will not be permitted. The stone or broken concrete shall be graded to meet the following requirements: 1. For Class 1 Rip Rap. Stone shall vary in weight from 5 to 200 pounds. at least 30 percent of the total weight of the rip rap shall be in individual pieces weighing a minimum of 60 pounds each. Sot more than 10 percent of the total weight of the rip rap may he in individual pieces weighing less than 15 pounds each. 2. For Class 2 Rip Rap. Stone shall vary in weight from 25 to 250 pounds. At least 60 percent of the total weight of the rip rap shall be in individual pieces weighing a minimum of 100 pounds each. \ot more than 5 percent of the total weight of the rip rap may be in individual pieces weighing less than 50 pounds each. 942-2 STONE FOR EROSION CONTROL. The stone shall be of a hard, durable nature and shall range in size as follows: Class Size A 2'-6. B 5- -15' All store shall meet the approval of the Engineer. While no specific Rradation is required, the various sizes of stone shall be equally dis- tributed within the required size range. The size of an individual stone particle will be determined by measuring its long dimensions. State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office James B. Hunt, Jr., Governor Wayne McDevitt, Secretary Division of Water Quality August 3, 1998 Mr. Phil Norris, P.E. Andrew and Kuske 902 Market Street Wilmington, NC 28401 NCDENF1 NC-- - C,APC'-J-"- DEPARTMENT OF ENVIRONMENT AND KWURAL RESOURCES Subject: ACKNOWLEDGEMENT OF RECEIPT AND REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 980611 NorthChase Spec Building New Hanover County Dear Mr. Norris: The Wilmington Regional Office received a Stormwater Management Permit Application for NorthChase Spec Building on June 5, 1998. 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 outlet structure is not located midway between the two inlets, as needed in order to insure that runoff is not short-circuiting the pond. Please relocate the structure or extend the piping and orifice up into the middle of the pond. 2. Schuler's method of calculating volume requires the computation of an Rv factor. The volume you calculate is deficient, based on the percent impervious. I have enclosed the page from the BMP document with the proper methodology. 3. The pond was probably dug at 4' to provide additional sedimentation storage. While basing the calculation on 4' is fine, please be sure the owner is aware that more frequent sediment removal will be necessary to keep the pond at the design depth of 4'. 4. I am unable to duplicate the 26,915 square feet you show as the surface area provided at 30.5. 127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper Mr. Norris August 3, 1998 Stormwater Project No. SW8 980611 Please note that this request for additional information is in response to a preliminary review. The requested information should be received by this Office prior to September 3, 1998, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. If you have any questions concerning this matter please feel free to call me at (910) 395-3960. Sincerely, Ms. Linda Lewis Environmental Engineer RSS/arl: S:\WQS\STORMWAT\ADDINFO\980611.AUG cc: Linda Lewis John Lancaster Central Files ANDREW & KUSKE CONSULTING ENGINEERS, INC. 902 Market Street Wilmington, NC 28401-4733 I�EC.1�ILVED JUN z 6 1998 BY: LFTTFR OF TRAN.qMITTAI John R. Andrew, P.E. J.A. Kuske, P.E. J. Phillip Norris, P.E. 910-343-9653 / FAX 910-343-9604 To: dlLef t - ------- Date: Job No. Subject: r• WE ARE SENDING YOU VIA ❑ ATTACHED ❑ ,VDER SEPARATE COVER ❑ SHOP DRAWINGS 2015RINTS ❑ TRACINGS ❑ SPECIFICATIONS ❑ DISKS ❑ COPY OF LETTER ❑ FAX TRANSMITTAL: NUMBER OF PAGES INCLUDING THIS TRANSMITTAL Call 910-343-9653 if you have any difficulty receiving this message. COPIES DATE N0. DESCRIPTION ❑ AS REQUESTED ❑ FOR YOUR USE FOR REVIEW AND COMMENT ❑ FOR APPROVAL ❑ FORBIDS DUE ❑ YOUR PRINTS LOANED TO US REMARKS: _ . , 2�yz r SIGNED CONFIDENTIAL AND PRIVILEGED: Information contained in this document is privileg and confidential, intended for the sole use of the addressee. If you are not the addressee or the person responsible for delivering it to the addressee you are hereby notified that any dissemination, distribution or copying of this document is strictly prohibited. If you have received this document in error please immediately notify the sender and return to the address above. EROSION CONTROL AND STORMWATER MANAGEMENT NARRATIVE NORTH CHASE SPEC BUILDING NEW HANOVER COUNTY, NORTH CAROLINA FOR 2 M DEVELOPMENT, INC. 1410 COMMONWEALTH DRIVE, SUITE 200 WILMINGTON, NC 28403 910-256-6151 ��eNe��f�fsio. •` r AR�I �n H� LLNO Mh IP e ,�fffffflaw",�,+ JUNE 1998 PREPARED BY: STORMWATER D E C E I V E JUN 2 61998 D D E M PRQJ # ANDREW & KUSKE CONSULTING ENGINEERS, INC. 902 MARKET STREET WILMINGTON, NORTH CAROLINA 28401 910/343-9653 910/343-9604 ( FAX) A & K #98059 NARRATIVE PROJECT DESCRIPTION: The project site is located within North Chase Park of Commerce on NC Highway 132 in New Hanover County. Lot 100 is a 9.76 acre lot south of Interroll Corporations facility that will be the site of a spec building. The spec building will be a 75,000 SF single story spec building expandable to a total square footage of 115,000 SF with gravel parking, gravel roadways and an outdoor loading dock. The spec building will be constructed and owned by the developer until a potential client leases or purchases the building. At that time, modifications to the approved plans may be required which may require permit name changes and modifications. The site was previously permitted under New Hanover County Grading Permit #GP41-97 issued June 2, 1997 and State Stormwater Permit SW8 970537 issued August 8, 1997. SITE DESCRIPTION: The site is a heavily vegetated 9.76 acre tract located in New Hanover County with grades ranging from 0.50% to 1.0%. Approximately 8.65 acres will be disturbed to allow construction of a spec building with gravel parking, gravel roadways and an outdoor loading dock. The site has been cleared , graded and heavily stabilized with a stand of tall grass under a previous permit. The majority of the proposed building pad has already been undercut and filled under a previous permit. The site also has an existing stabilized detention pond which was constructed under a previous permit. EROSION CONTROL MEASURES: The attached plans and specifications give the requirements for erosion control measures. The site is currently stabilized with a stand of tall grass and surrounded with existing silt fence. The plans direct the contractor to remove and replace the existing silt fence as required. Some new silt fence will also be installed as shown on the plans. Gravel check dams will be provided in the proposed swale on the north end of the site and in the existing low flow diversion ditch on the south end of the site. The existing detention pond will be used as a silt basin during construction and restored to the proposed design contours prior to completion of the project. Erosion control measures shall be installed 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 as needed. Remove sediment as necessary to provide adequate storage volume for subsequent rains. When the contributing drainage area has been adequately stabilized, remove all materials and any unsuitable soil, and either salvage or dispose of it properly. Bring the disturbed area to proper grade, then smooth and compact it. Appropriately stabilize all bare areas around 2 the drop inlets. A gravel construction entrance will be provided as noted on the plans. Maintain the gravel construction entrance in a condition to prevent mud or sediment from leaving the site. The contractor shall inspect the construction entrance on a daily basis. This may require periodic top dressing with additional stone. Any objectionable materials spilled, washed, or tracked onto public roadways shall be removed immediately. STORMWATER MANAGEMENT MEASURES: The project site is located in New Hanover County. Land disturbing on the site will exceed one acre which requires the site to comply with the state stormwater regulations. A similar stormwater detention pond was permitted on this site under state stormwater permit SW8 970537 issued August 8, 1997. The proposed stormwater detention pond will have the same shape as the previously permitted pond and will be designed to achieve 90% TSS removal. Critical design elevations will change from the previously permitted pond due to information received from a new topographic survey of the site. However, the new pond is being designed and permitted for the same amount of impervious area. The pond is being designed for proposed and future development shown on the plans. The pond has excess storage capacity to handle even more future development. However, future development not shown on the plans will require a permit modification. The storage volume will be released within the 2-5 day drawdown period as shown in the calculations. Forebays are provided at each end of the pond. They have been designed in accordance with the instructions received in a phone conversation with Linda Lewis, State Stormwater Engineer. A 10 foot vegetated shelf has also been provided at a 6:1 slope in the main part of the pond. Vegetated shelves have not been provided in the forebays in accordance with item 6 on page 2 of the state stormwater guidance document issued to Engineers and Developers on February 9, 1998. During the first phase of the project, pipes will be installed on the north and south end of the site as shown on the plans. All stormwater from the first phase will be piped into the forebays except for stormwater running off half of the proposed gravel road and small gravel parking area. This stormwater will sheetflow into the large swale on the north end of the pond. Stormwater from green future parking areas along the front of the building will sheetflow into the pond. When the future parking in the front is constructed, curb and gutter and piping will be installed to channel the stormwater into the forebay on the south end of the pond. All roof drainage will flow to the rear of the building into a header pipe shown on the plans. The header pipe will discharge into the forebay on the south end of the pond. CONSTRUCTION SEQUENCE: The contractor will install the gravel construction entrance and new silt fence prior to beginning any grading operations. The existing silt fence on site will be fixed and/or removed and replaced as required as noted on the plans. The existing detention pond will be used as a silt basin during initial grading phases. The detention pond will then be fine graded to the proposed contours shown on the plans and the outlet structure and pipe will be installed with rip rap protection. Disturbed areas will be landscaped or seeded upon completion. 4 SECTION 02920 SOIL EROSION AND SEDIMENTATION CONTROL 1. GENErM L 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, sediment basins, check dams, 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 30 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. 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 30 pounds carpet grass, 30 pounds Bermuda, 20 pounds Creeping Fescue, and 20 pounds Kentucky 31 per 100 pounds of seed. Purity of seed shall be a minimum of 98 percent and germination shall be a minimum of 85 percent. Mixture shall contain 20 pounds rye per 100 pounds if planted November through March. G 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 darns shaii 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. 2.11 Wood Stakes for tree protection shall be 4' tall, placed at 6' intervals at the dripline of the tree to be preserved. 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 seed beds 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 1000 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. 3.3.3 Stone Check Dams, placed at the discharges of creeks, ditches, and swales, shall consist of Class A rip rap at minimum two feet high and three feet thick across the watercourse, with a one foot thick layer of gravel on upstream side. 3.4 Sedimentation Basins are required for large ditches to provide for settling of sediments prior to the ditch discharging offsite. Basins should be constructed with sufficient surface area, a minimum 2 feet of sediment storage depth, and minimum 2 feet of freeboard to provide for storage of stormwater and settled soil. Stone check dams shall be placed at the discharge of each basin. 3.5 Vegetative Cover: Establish permanent vegetative cover on all unpaved areas disturbed by the work. 3.5.1 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 3.5.2 Seeding: Disturbed areas along roads and ditches shall be seeded with 2 to 3 pounds per 1000 square feet of the specified seed mixture during the period from December through January. Seeding performed during the period from March through June does not require Rye seed in the mixture and may be applied at a rate of 1 to 2 pounds per 1000 square feet. Seed shall be worked into the bed to a depth of 1/4 inch. 3.5.3 Mulch all areas immediately after seeding. Mulch shall be applied and anchored as specified hereinbefore. 3.6 Construction Entrance: Provide an aggregate drive, 25 feet wide by 50 feet long by 6 inches thick at each entrance to the site used by construdtion vehicles, until such time as the permanent .roadway is constructed. 7 Andrew & Kuske CONSULTING ENGINEERS, INC. John R. Andrew, P.E. J.A. Kuske, P.E. J. Phillip Norris, P.E. 902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone 910/343-9653 • Fax 910/343-9604 June 5, 1998 NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3845 Attn: Ms. Linda Lewis, Environmental Engineer Re: North Chase Spec Building New Hanover County A&K Project No. 98059 Dear Ms. Lewis: Our submittal for the subject project includes the following information: 1. Original and one copy of the Stormwater Management Permit Application Form; 2. Supplement Form SWU-102 for Wet Detention Basin; 3. Narrative description of proposed stormwater management (forthcoming); 4. Pond Maintenance Agreement; 5. Check for the $385.00 application processing fee; 6. Two copies of calculations; 7. Two sets of plans. 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, ANDREW & KUSKE CONSULTING ENGINEERS, INC. John A. Kuske, III Project Engineers JAKIII/sbs enclosures cc: Dick Hurst/Miller Building Corp. ST0HMWATER E C E I V E JUN 0 51998 D 98056swi ENGINEERING & FACILMEs IA&K #98059 VE APPLICATION FOR PERMIT FOR A LAND-DISTURBING ACTIVITY File}�Ur, f� �Nu ber U + ,+ �(S911 o0 UNDER THE CONDITIONS SET FORTH BY --`�- THE NEW HANOVER COUNTY Fee Paid SOIL EROSION AND SEDIMENTATION CONTROL ORDINANCE Date Applicant: 2M Development, Inc. Applicant's Agent: Andrew & Kuske Consulting Engineers Inc Address: 1410 Commonwealth Drive Suite 200 Address: 902 Market S r eel Wilmington NC 28403 Wilmington, NC 28401 Telephone Number: 910-256-6151 Telephone Number: 910-343-9653 Total Acres of Land Disturbance: 9.76 Purpose of Development Commercial/Industrial Spec Bldg. Location and Description of Land Disturbance: A be built on Lot 100 in North Chase Park of Commerce. Land will ..,, disturbed as required to construct the Proposed spec building, roadParking areas truck loading dock and detention pond STATEMENT OF FINANCIAL RESPONSIBILITY Land owner(s) of Record Person or firm(s) financially responsible for the land - disturbing activity. If not a North Carolina resident You must have a N.C. agent (List Below) Name: . 2M Development, Inc. Name: 2M Development, Inc. Address: 1410 Commonwealth Drive Suite 200 Address: 1410 Commonwealth Drive Suite 200 Wilmin ton NC 28403 Wilmington, NC 28403 Telephone Number: 910-256-6151 Telephone Number: 910-256-6151 Location of deed(s) or instrument(s): County New Hanover Book Page The above information is true and correct to the best of my knowledge and belief and was provided by me while under oath. (This form must be signed by the financially. responsible person if an individual and by an officer, director, partner, attorney -in - fact, or other person of authority to execute instruments for the financially responsible person if not an individual.). I agree to provide corrected information should there be any change in the information provided herein. Date: Q� Name (Type or Print) John Lancaster Title: ice President Signature: a NntaryrPublic of the Count of Y State of North Car na, hereby certify that ` ' appeared personally before me this .day and being duly sworn acknowledge tha�the_ above form was executed by him. Witness f y and and notarial seal, this _ day of . , f 9 Sear ,� r Notary�� ; t, " • My com(pa{issi.0 expires( ��� � i P D A- On 7_ —