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HomeMy WebLinkAboutSW8000329_HISTORICAL FILE_20001013 STORMWATER DIVISION CODING SHEET POST-CONSTRUCTION PERMITS PERMIT NO. SW8 0003a-� DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE gay I 6 YYYYMMDD $trte of North Carolina Department of Environment A and Natural Resources ' • Wilmington Regional Office ^_^` d� James Hunt, Jr., Governor NCDENK Bill Holman, Secretary Division of Water Quality NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES October 13, 2000 Mr. C.A. Boggs, President Boggs Paving, Inc. PO Box 1609 Monroe,NC 28111-1609 Subject: Permit No. SW8 000329 Boggs Asphalt Plant, Leland High Density Stormwater Project Brunswick County Dear Mr. Boggs: z The Wilmington Regional Office received a complete Stormwater Management Permit Application for Boggs Asphalt Plant, Leland on September 14, 2000. 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 000329 dated October 13, 2000, for the construction of Boggs Asphalt Plant, Leland. This permit shall be effective from the date of issuance until October 13,2010,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 276 1 1-7447. 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:\WQS\STORMWAT\PERMIT\000329.00T cc: John Hazelton, P.E. Tony Roberts, Brunswick County Inspections 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 000329 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGENIENI' 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 Boggs Paving, Inc. Boggs Asphalt Plant, Leland Brunswick County FOR THE construction,operation and maintenance of 2 wet detention ponds in compliance with the provisions of 15A NCAC 21-1 .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until October 13,2010 and shall be subject to the following specified conditions and limitations: 1. 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 on page 3 of this permit, the Project Data Sheet. The stormwater controls have been designed to handle the runoff from 164,700 ft2 and 173,393 ft2, respectively, of impervious area. 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. The runoff from the first 1" of rain from all onsite and offsite built-upon area permitted with this project must be directed into the permitted stormwater control system. 2 State Stormwater Management Systems Permit No. SW8 000329 DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Project Name: Boggs Asphalt Plant, Leland Permit Number: SW8 000329 Location: Brunswick County Applicant: Mr. C.A. Boggs, President Mailing Address: Boggs Paving, Inc. PO Box 1609 Monroe, NC 28111-1609 Application Date: September 14, 2000 Name of Receiving Stream/Index 9: Banton Branch / (CFR 18-77-1-1-2) Classification of Water Body: "C Sw" Pond Number: 1 2 Design Storm: 1" V Pond Depth, feet: 6 6 Permanent Pool Elevation, FMSL: 41.5 40.5 Drainage Area, acres: 4.77 5.42 Total Impervious Surfaces, ft': 164,700 173,393 Offsite Area entering Pond, ft': none, per Engineer Required Surface Area, f 2: 9,451 9,776 Provided Surface Area, ft2: 9,775 9,821 Required Storage Volume, ft': 13,218 13,988 Provided Storage Volume, ft': 15,998 16,154 Temporary Storage Elevation, FMSL: 43 42 Controlling Orifice: 1.5"� pipe 1.5"� pipe 3 State Stormwater Management Systems Permit No. SW8 000329 If. SCHEDULE OF COMPLIANCE I. The stormwater management system shall be constructed in it's entirety,vegetated (see Section 111, Part 7) 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. "file permiltee 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. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of D WQ. The records will indicate the date,activity,name of person performing the work and what actions were taken. 5. Decorative spray fountains will not be allowed in the stornwater treatment system. 6. The facilities shall be constructed as shown on the approved plans.This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 7. Upon completion of construction,prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility,a certification must be received from all 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. 8. I fthe 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. A modification must be permitted priorto any construction.Thefollowing 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,acquisition,or sale of the project area.The project area is defined as all property owned by the permiltee, for which Sedimentation and Erosion Control Plan approval was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The Director may determine that other revisions to the project should require a modification to the permit. 11. 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. 4 State Stormwater Management Systems Permit No. S W8 000329 12. 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. 13. The permittee is responsible for verifying that the proposed built-upon area does not exceed the allowable built-upon area. 14. The Director may notify the permittec 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 permittec shall provide copies of revised plans and certification in writing to the Director that the changes have been made. 15. The permittee shall notify the Division of any name,ownership or mailing address changes within 30 days. III. GENLRAL 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 Permittce 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) which have jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Penmittee 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. 7. Unless specified elsewhere,permanent seeding requirements for the stormwater controls must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Permit issued this the 13th day of October, 2000. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION C AA- Kerr T. Stevens, Director Y Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 000329 5 State Stormwater Management Systems Permit No. SW8 000329 Boggs Asphalt Plant, Leland Stormwater Permit No. SW8 000329 Brunswick County Designer's Certification 1, ,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: SEAL Signature Registration Number Date 6 pk WFC ®1CK=13 l LETTER 01 RVA-W-9D 909 Market Street SEP 14 2000 Wilmington, NC 28401 910.762.4200 0 FAX: 910.762.4201 DATE: 9/14/00 JOB NO.: 00109.80 BY. TO: NCDENR- Division of Water Quality _ 127 Cardinal Dr. Ext. RE: Boggs Asphalt Plant Wilmington, INC 28405 Stormwater Project No. SW8 000329 Request for Additional Information - Response ATTENTION: Linda Lewis We are sending via: 0 Overnight Regular Mail F-1 Pick-up Hand Delivered The following items: Correspondence 0 Plans Specifications FX Other as listed below: COPIES DATE NO. DESCRIPTION 2 9/14/00 1 Response to DWQ Comments 2 9/14/00 2 Revised Stormwater Plan & Stormwater Details 2 9/14/00 3 Revised Stormwater Permit Applications & Supplements 2 9/14/00 4 Revised Stormwater Calculations THESE ARE TRANSMITTED as checked below: 8 x For Approval B As requested e Approved as submitted B Returned for corrections For your use For review and comment Approved as noted Forward to subcontractor REMARKS: COPY TO: Mr. Carl Boggs Boggs Paving, Inc. SIGNED: "� r Stormwater Treatment - Wet Detention Pond #1 Design 7/3/00 Stormwater Project No.SW8 000329 Boggs Paving, Inc.- Basin#1 Design Criteria Drainage Area = 207,800 112 Impervious Area= 164,700 ft2 Percent Impervious= 79% Main Pond Depth = 6.0 ft Forebay Pond Depth= 6.0 It Temporary Pool Depth= 1.5 ft TSS Removal, Coastal Co. = 90% SA/DA= 4.6% Required Surface Area= 9,560 ft2 Rv= 0.77 Design Storm= 1.00 in Required Temporary Volume= 13,334 ft3 Pond Design Provided Surface Area P.P. = 9,605 ft2 Provided Temporary Volume= 15,998 ft3 Permenant Pool Volume= 37,056 ft3 Forebay Volume Required = 7,411 ft3 Forebay Volume Provided = 7,488 ft3 Orifice Sizing Design Temporary Volume= 13,334 ft3 Flowrate, 2 Day Drawdown = 0.0 cfs C IVED Flowrate, 5 Day Drawdown = 0.031 31 cfs I�LK:d' 1.5"Orifice Head= 0.7188 It 2" Orifice Head = 0.7083 it SEP 14 2000 Flowrate, 1.5"Orifice= 0.050 cfs Flowrate, 2.0"Orifice= 0.088 cfs DWQ Drain Time, 1.5"Orifice= 3.1 days PROJ# Drain Time,2.0"Orifice= 1.7 days Results Permanent Pool Elevation = 41.5 ft, msl Temporary Pool Elevation = 43.0 ft, msl Overflow Structure Elevation = 43.0 ft, msl Emergency Spillway Elevation = 43.5 ft, msl Orifice Size= 1.5 Inch Main Basin `�p�gunuuprrr� Permanent Pool Width = 56.5 ft ��.``� ��1 CqR Permanent Pool Length = 128ft �a SS/t Temporary Pool Width = 65.5 5.5 ft �Q Temporary Pool Length = 141.5 ft SEAL ° Forebav E 025397 Permanent Pool Width = 56.5 ft iA. /S/oo Permanent Pool Length = 42.0 ft S ''-' ✓GINEFy� � I, »_ WKD#00109.80 WIC JOBigO. 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I ��'��• C e: I-LI t I i 1 I I I - t 1 1 ! r i � 1 I I I i I- LI I ! !L. 1 I I '- T 1 1 I _r 1 .LI LI L -1-1-LILL ILL I _ I 11 1 I I I l �I.1 �LJ J ' 1 I I f L � F I I-rl t s 1 1 J L ' II-- J_i I II r LLI II j i I 1 I �I I I I I I _I I 11 I I i I I I I ' I Lr 11 I _I I I I I I I !T I 1 I_i i LI it I 1 1 r j_LI [[77 I�---I;-- Li-I- TL 1 1 r-I r' 1I it J- �1 1 I L L_ ' I __I I 11111 ri I �' IIIIII 1 IrIiI I I _ 1 rlllll .- I I I ! 1.. L - L. ! _ij, -I - I 1 fT iT1 L��I I-l-_ I 1 1_ � I L L r - . I f I lit I ' _ ---- WK I® DICKSON JOB NO. Engineers•Planners•Surveyors Landscape Architect: SHEET IIC. S _OF CO JOB NAME p_&o _5 5,,.�.� � COMPUTED B`( _J LAt3___ DATE 3.1 17�00 S U BJECT _IJQS %--, rLL Uy�r°���—__ CHECKED BY DATE �j 1 rr I I I II I I I I I _ I _ L i L1 1 - A A M _c7, v �i I I �__LLI j Joz� F Lj=_I(i i0.`tS 3 . 7Ir A�4+ 7 T I Ll -. or �5�e 1U -[ ewi Sfol. i'i-rx lL -- � _ _ 1 1 7 IIIIIIII it I III- 1 L 1 It 1 -I I-i-I-__iTT�i_I I-I 44 4 0� I - Ill � I L I I 1 4-IoiC�1� � _ I ItLN_ _(' L 1 1 1 1 I-1 1 LI 1 i i-i-I I-I I ' I I I .-�— _ t--��TL i r _ !-I_ L I �[f7-[�_(�i___1-- i_1 i�_1 1 1_ 1 ^ I- LLT_L 1 _L- --I--t-'-1 � _ 1 I-L J i_!_I " I"� i_I I I�I L I--r-I - I I I 1 11 f.__I "-1-i r I-1 �_.__i _r__L� f-I-1�j iT-i I 1 1 1 1 1 1 1 1 1 I LI I L -L ILI_d—_i� -L 1J 1 I. I_ L L LI_ I LL 1 I_ I_I _I 1 1 -I _L ITI 1 1 _I_ _i - !-1 1 1 1 -FT 1 1 �i-1Ii-_ ! 1 1 k �_.._ L LI_I r_I, r _ _I__ ^�^I ti LI �1 1 1_I I -I r�_I _i r-Z_I _- I_ 11 f �"i LLLLLLi��� 1 I--I �-I I IJ I-L�1-1 �i-I I-f L(. -_�f_1 ! I_ i -1 I L I!-1 L 1 i I h L1 L_LJ-� L l I-LI H- �;-�-iI--1--I-1 - -iTl-i j_I 1 "i i- 1 iTi--f"-1 I-I-T-ri T--1 =i'I-! L 1_Ij_I I L - L _ram �L 1 1_i_ T - L L L I-1 1 1 1 1 i 1 I L '�_[I F 1 -r I I_ -i_[ I - 1 L _LLI L_ F 1 I-I I I �L r 1 L I I i i-I L .�I r 1 L I-i[L Lr I-I f , ��[1_ 1 1 1 �� _ 1 1D-�1 1 I I LL I _LI_1 IT^ L-:_,._LLI-i_!-_1___' I � ' L 1 L LI _L LL=I i I r F- 1 _i-I--TL-=r �LLf� r I I r '_I �; 1--i -I--F- -��L�-F I_�1 1 rrI-(- [!r-_TLL_L� L1_-�-1--i L!_I LI 1TI_ - 1 1-I-� I-1 1 iiT -1 T 1 1 ( -1 1 1 1 1 =i [li-I-i- 1 r i�Ti WK DICKSON Job No.—____ Engineers•Planners•Surveyors LanAscapGGegqA ehitects SHEET iii JOB N A DA E_ -�J J -----...----'----- 0 0 1i1 P I l T,:D B Y" ----- SUBJECT DA 5 # 1 CIi EC KED BY T--� L E . I- Isl'S 1 I J I� � I I I I Iii1 IT-. i 1 1 1 1 ITi I I I I I I Ll Tl�ri I I I rl 1 1 1 1 1 1 1 I I I I I I I �7 J—I 11 L,�I�I LI I t I_f I I I �I LI I LL�rl_L L �1_� LI Li T LI I _I t L!� 1 1 1 _I-f I I I 1_L. 1 1 I III _ L_I 11 I Jj _1 L_r_ -I L I i I_ L I_ _u ! L_ 1 L ] yLL_! I_I� LLL11 L I } 1-I __ I r -17_ i t J i r L_ Lr I I_I I J_L=_J_�-f- �`L I L i L f -'- L, ir1 I _L �'�' I �rl IT J1 rJ .,_� L ITl Li- 1_l I L I-1 L,1 l-L- I_I I I L I I- �I- I _ _L I-1 f'!_�_[r _�rI-II-�--I--I_— L I--I 1 1 I [Lf- -IJ-! L-L �-~'I----L- I L__LI I - I--}-�-- - "-CFI-f-�I `L�� _L L _ LI_LLI _I ,I_'�_ L LI _ _ _ _ _ _ --� I _ � - L I .LLLI� LLI ��,I_I_Ir �' c. -TI iT1 ITI �I-I F� 1- I L_ LL'.-_�_I__,I+ I I I I I I 1 _ I - T T, _j_­_I - �_. I-�i-I-�r I r - I -__I- i" L_I_.I-1__L 1--I- -I �-1- J_L �TL I J _�_---i- L I_i"L �_�L I _T- L -I �-�i-Tf���L!!_ � 1 LL - III-- L!L L_ L I`I �_ I_ -1��L rl-r-i_i� r � I 1 L I_ _ L_ f - I-' �-- -I IF � L- -�--- -r-IIL__i-_T.L'_L ._I�__ LL--�L1� I+I -L_I----I-- I1 r!(-��_�_• . I I -r-- 1•-.-.__.---._-- +I_ I ' I . I I I L.L.-�I � - 41 --L--- _LI -- LL. F._.Ir-_f__I �._L 1 _I_ _l -I_I L r _� Lk L _j I— 'I--ILI IT_I (=I I' ' _I i i_L— I %_ I t I _LI— 1 i. 7� i _ ._l L�_ F 1 r ILL L .J 1�1 - !_ 1: --, f 1 1 1 r I�r1 -I-I r-Hr1 .1 ! _r 1 ' I 1 r J I I I_I I I I r' 1T-CLL I (_ 11T'�_ C L_- L_L 1 1 '�' 1 1 -T I J 11 11 1—I } I I I I 1 1 —~i 11 i I I-- . -I , �_i ! .. Li .. � I I -1-_ __r .L_1 T rl I 1 �' I I I I I I I I L I I f i g I I 1rr I L ' l i I _II I I I i r r 1 I L I L I I I L 1 1 i I'f r L' 1 1 -L i_LI -I-r L_. ITr I ` I - I� L f 1 LTr❑= J -�4 IIII 1 L' ' �F Stormwater Treatment -Wet Detention Pond #2 Design 7/3/00 Stormwater Project No.SW8 000329 Boggs Paving, Inc. -Basin#2 Design Criteria Drainage Area= 236,163 ft2 Impervious Area = 173,393 ft2 Percent Impervious= 73% Main Pond Depth = 6.0 ft Forebay Pond Depth = 6.0 It Temporary Pool Depth = 1.5 ft TSS Removal, Coastal Co. = 90% SA/DA= 4.1% Required Surface Area= 9,633 ft2 Rv= 0.71 Design Storm= 1.00 in Required Temporary Volume= 13,973 ft3 Pond Design Provided Surface Area P.P. = 9,638 ft2 RE u .LV� Provided Temporary Volume= 16,154 ft3 Permenant Pool Volume= 38,064 ft3 rr) r ^: Forebay Volume Required = 7,613 ft3 sCi Forebay Volume Provided = 7,620 113 DWQ Orifice Sizing PROJ # Design Temporary Volume= 13,973 ft3 Flowrate,2 Day Drawdown = 0.081 cfs Flowrate, 5 Day Drawdown = 0.032 cfs 1.5"Orifice Head = 0.7188 ft 2" Orifice Head= 00.050 ft RECEIVED Flowrate, 1.5"Orifice= 0.050 cfs Flowrate,2.0"Orifice= 0.088 cfs Drain Time, 1.5"Orifice= 3.2 days SEP Drain Time, 2.0"Orifice= 1.8 days 14 2000 Results DWQ Permanent Pool Elevation = 40.5 ft, msl iP Temporary Pool Elevation = 42.0 It, msl Overflow Structure Elevation = 42.0 ft, msl Emergency Spillway Elevation = 42.5 ft, msl Orifice Size= 1.5 Inch Main Basin „`pruumrp�r�� Permanent Pool Width= 61 ft Permanent Pool Length= 118 ft �,`p� OFESS/ �� '• Temporary Pool Width= 70 ft Temporary Pool Length = 122.5 ft (f SEAL Foment 02539, Permanent Pool Width = 61 ft s � '�(S-(ob Permanent Pool Length = 40.0 ft ;,0$ �NGINcG� vU.` i� •..»»r v ,% 'fit 1111t� WK DICKSON RECEIVED JOB N0. Engineers•Planners•SurveYars Landscape Architects (�[' I� q SHEET DIO. I OF JOB NAME_U°J J 9----------- JGP I:.'.�t11,4000 By SUBJECT —_u a 5, .� .' ' Z __ W CKEO G`! _ 01,,7E__ PROD# L �LJ_LI LI f- l 1- ITI Ii�-i T! f yy�� L ! .�{ /-� r c IT�o f-I LI_eIT � -L'-- T(S� X__ r�)1�+,2 �f s I z-0 -� I LI L L� L lL� � !/ I_ l ! LJI�-�t-1�r� .� Ll L-I-�.r, -I I I I I 12�-16,1 1. (� 7—S ,���_ I I -� �I I I I I I I I~j l l I I - ��I I I I I I L I 1 ��— L �I_ I_ ! 1 LLI 1 - �- p'�y r �S CArea1 � 7LO Cf=�, ��151s /��rr�Ieil 1 +7_nm�la i ID l z l 4l:ImL�r Crlell x�L2_3 �� t LI1�� x 1 � 4Ui I� I�T�; �- -- i � LI�J LLL� I -.L J J a-I LIJ L� I ✓r � �V� to V S A f C o` ! i // r - - IJ L 7 7 (� �' ' _ I L-I C- �p I- L L LL _ L-i L I LL _ L'L'qqi �Ip�T T_ Si ��I LLL..i I Imo! 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IZ S Y' I'Ij K 1 9 T I- I LL�-Ii D U i- I 2 1 ) y OI ' f 1_i 1 1 1 TLj I rl rl !-1 Ir� I-T 1 I 1 r 1 -- 1 I 1 ' I O vw�Gi 1 f� i y 4'(� L� r ll IT �, 2 L>c IS .�I I I —1 Lr ,_r I ! -_I I J I _ I L L-I I � ! L! -I r.� i// r I ' I (3 /�rl LI I (- r I I r- i-I 1 I-17T i� lb i2 �Ifyl Irn/ C-pfq ,' Ij ! h --I i L ' +.i _� I I I I L U I 1 l L_ n l _LTI rl Ll ! I I I !_�1 I I �i i L - I 1 i 1 F C Sri L LLL LI L ! .J '11 _I i J _ _I ' I_I._I ITI ITI�, 1 j - I _j L LPL' I � I I I I T II I r Ll lt- , ALL II-I T I I 77 11 i l l Li l i l l l I LI L't"1 ,I I ! Ili f r ( �� I l r'-_ ri�_I WK DICKSON JOB 110 Engineers•Planners•Surveyors Landscape Archlrects H L L IV 0 _ 3 OF-- JOB PhME_ 60995_---.-_ COMPUTED BY _. __- _ O�:I L___ SUBJECT 0%t r, '5- ^HEGKED BY i,.','E-----_-... L 4Z r�L! 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Engineers•Planners•Surveyors Landscape Architects S P C[I NO — OF JOB NAME f7oSy 3 COMPUTED BY _-_,JM I� DATE_-.-_6/z9lOo SUBJECT 6a$ �.. 2 _ CFiECKEO BY _ _ DATE _-1I -t- � � !-}_- I-- I �-I I_I+�i_! .� I_..1_I- LI_�I L L 1 - jL ! II_19�rl -�1 --I I- 1-kI i_ LT - 1 I LI -I i ��I=-C�-L ! .r LL �l_I- L 1 1 rk- -1 I --i T T�-! 1 ITI �I 1 Ir��- -LI_I_L F� F 1 _LL L LL!__I_!_f__ LL _ _I LLLJ- L I T E i f _ -+!-1-+I �I-I- Lr • LL k�_ 'yly�I i I I 1 1 I 1 1 _�__._ L t .�__ I.d j j �_I +r�r�rl T -I r Tl I��r- LI I 1 � .t T t L _1_! I_ I�_1L_I_ _ L 1 ' ._.! •_I iL,_'_I._ L.I-I _LI I I I I I ---II I I +-I- _ I L! ! I+I-L +=1-=1 j ; ' f�-I �' L ' L' - I LLI .I-. 1 I� i��.�. +-�-t- I. I III CT I p_ I�I_I J•�'LI IJrT,T�T-+ L4 ! 1..�_! L _IIit T I ! -- -! 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F I it LI -i T I';r -,fJ .. __ _ I L-_LI I I I i rf i I I_t -i 1 - I :. � rr _ FF- I I I _rl T I� `Y"I r- I I I I 1 Response to NCDENR Division of Water Quality Request for Additional Information September 14, 2000 Boggs Asphalt Plant Stormwater Project No. SW8 000329 1. I think you misunderstood item number 9 of my April 26, 2000, letter. The required surface area obtained by using the SA/DA ratio tables DOES include the forebay area. What I meant to convey to you was that when I scaled the pond area (including forebay) using the dimensions provided, I kept coming up with less surface area than what you were reporting on the supplement. I only wanted you to check the dimensions and accurately report the total surface area at permanent pool in each pond being provided (included the forebay), as they scale out using the dimensions shown. This assumes of course that there is sufficient area to meet the required SA/DA ratio. Based on the dimensions shown on the plans, the total surface area at permanent pool provided in Pond 1 is approximately 12,317 ftz. The supplements and calculations are incorrectly reporting the surface area without the forebay. Please revise the supplements and calculations. Response: Please review attached Plans and Wet Detention Basin Supplements. The revised calculations use the forebay area in the required surface area obtained from the SA/DA ratio tables. 2. The 170' dimensions shown on the plans, the total surface area at permanent pool of Pond 1 is incorrect. The dimension shown indicates that it is 170' from end to end, but in reality, it is only 170' from the end to the forebay wall. Please revise the detail to show the entire correct dimension including the forebay. Response: Please review attached Plans and Wet Detention Basin Supplements. 3. The provided 1" storage volume must necessarily include the storage in the forebay above the permanent pool. Please check to make sure you have done this. Response: Please review attached Plans and Wet Detention Basin Supplements. RECEIVED SEP 1,A 2000 DWQ PROJ# State of North Carolina Department of Environment and Natural Resources r, 0 Wilmington Regional Office James B. Hunt, Jr., Governor on Mm Bill Holman`,, Secretary NLVww- NR Division of Water Quality NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES ,tune 26, 2000 Mr. John Hazelton, P.E. W.K. D.ickson 909 Market Street Wilmington, NC 28401 Subject: ACKNOWLEDGMENT OF RECEIPT AND REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SWS 000129 Boggs Asphalt Plant Brunswick County Dear Mr. Hazelton: The Wilmington Regional Office received a Stormwater Management Permit Application for Boggs Asphalt Plant on May 25, 2000. A preliminary review of that information has determined that the an is not complete. The following information is needed to continue the stormwater review: 1. I think you misunderstood item number 9 of my April 26, 2000, letter. The required surface area obtained by using the SA/DA ratio tables DOES include the forebay area. What I meant to convey to you was that when 1 scaled the pond area (including forebay) using the dimensions provided, I kept coming up with less surface area than what you were reporting on the supplement. I only wanted you to check the dimensions and accurately report the total surface area at permanent pool in each pond being provided (including the forebay), as they scale out using the dimensions shown. This assumes of course that there is sufficient area to meet the required SAIDA ratio. Based on the dimensions shown on the plans, the total surface area at permanent pool provided in Pond 1 is approximately 12,317 ft', and for Pond 2 is 12,261 ft". The supplements and calculations are incorrectly reporting the surface area without the forebay. Please revise the supplements and calculations. 2. I11c I' U' dit:rn :;i1 :;L:::;; br the permanent pool of Pond i is incorrect. The dimension shown indicates that it is 170' from end to end, but in reality, it is only 170' from the end to the forebay wall. Please revise the detail to show the entire correct dimension including the fcrebay. 3. The provided I" storage volume must necessarily include the storage in the forebay above the permanent pool. Please check to make sure you have done this. 127 Cardinal Dr. Ext.,Wilmington,North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004 An Equal Opportunin.Affirmative Action Employer 50% recycled/10% post-consumer paper Mr. I-lazelton June 26. 2000 Stormwater Project No. S'A'S 000329 ---------....----------------------------------- 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 July 26, 2000, 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 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 mtmber 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 e:naineer 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 rnatter please feel free to call me at (910) 395-3900. S inc erely , _ Linda Lewis Environmental Engineer RSS/arL S:\WQS\STORMWAT\ADDINFO\000329.JUN cc: Linda Lewis 127 Cardinal Ur. Ext., Wilmington,North Carolina 28405 Telephone 910-39.5-3900 FAX 910-350-2004 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post-consumer paper r^ Permit No. SW8 000329 (to be provided by DWO) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATIONT 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 an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. 1. PROJECT INFORMATION Project Name: Bps Asphalt Plant- Leland Contact Person: Margaret Gray __ _Phone Number:_(910) 762-4200 For projects with multiple basins, specify which basin this worksheet applies to: # 1 Elevations Basin Bottom Elevation 35.5 ft. (floor of the basin) Permanent Pool Elevation _ 41.5 ft. (elevation of the orifice) Temporary Pool Elevation _ 43.0 ft. (elevation of the discharge structure overflow) Areas Permanent Pool Surface Area _9,605 sq. ft. (water surface area at the orifice elevation) Drainage Area . 207,800_ sq. ft. (on-site and off-site drainage to the basin) Impervious Area _ 164,700 sq. ft. (on-site and off-site drainage to the basin) Volumes Permanent Pool Volume 37,056 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 16,220 _ cu. ft. (volume detained above the permanent pool) For.;l:a Volume - cu. it. (approximately:.0/ of total vo?+rme,) Other parameters SA/DA' _ 4.6% (surface area to drainage area ratio from, DCVO table) Diameter of Orifice 1.5 in. (2 to 5 day ten7porary-pool draw-down required) Design Rainfall 1.0 in. Design TSS Removal' _90.0 % (minimum 85%required) Footnotes: When using the Division SAIDA tables, the correct SAIDA 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 nonstandard table entries. ' In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90%TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90%TSS removal. Form SWU-102 Rev 3.99 Page I of 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. 1005. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initials ic t / _a. The permanent pool depth is between 3 and 6 feet(required minimum of 3 feet). __b. The forebay volume is approximately equal to 20% of the basin volume. c. The temporary pool controls runoff from the design storm event. _ d. 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) Af. 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. —L1i!�—h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).. Vegetative cover above the permanent pool elevation is specified. A trash rack or similar device is provided for both the overflow and orifice. _ ( _k. A recorded drainage easement is provided for each basin including access to nearest right-of-way. 1. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin. m. A rnechan.ism is specified which will drain the basin for maintenance or an emergency. 11I. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, pretreatment including fbrebays and the vegetated filter if one is provided. This system (check onc-) does_X does not incorporate a vegetated filter at the outlet. This system (check one? _ does X does not incorporate pretreatment other i;ian a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention 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 the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximuiu iieight 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 4 . 5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4.5 feet in the forebay, the sediment shall be removed. BASIN DJAGRA.M ill in the blanks) p Permanent Pool Elevation 41 . 5 Sediment Re oval El. 3_0 75 o I I `— % dime.[Removal Elevation 3 • - 75% _Bottom El e anon ------- -------------------------------------Y.------ / Bottom Elevation 35- 5 . • �25"0 / 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 Rev 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: C .A. ( Drew ) Boggs III 'title: President, Boggs Paving , Inc . Address: P.O . Box 1609 , Monroe, NC 28111 -1609 Phone: 704-289-8482 Signature: Date: 5721-cr) J Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I, /t unc� s 5-?a w r a Notary Public for the State of AiY 11-k n z)t/-s County of do hereby certify that Coe Z ZZL personally appeared before me this .2V�1 day ofZa rcG, 2doo , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SEAL My commission expires eZ&t4 M Form SWU-102 Rev 3.99 Page 4 of 4 Permit No. SW8 000329 (to be provided by D 6VQ 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 an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. 1. PROJECT INFORMATION Project Name: Boggs Asphalt Plant- Leland Contact.Person: Margaret Gray Phone Number: (910) 762-4200 For projects with multiple basins, specify which basin this worksheet applies to: # 2 Elevations Basin Bottom Elevation 34.5 ft. (floor of the basin) Permanent Pool Elevation 40.5 ft. (elevation of the orifce) . Temporary Pool Elevation 42.0 ft. (elevation of the discharge structure overflow) Areas Permanent Pool Surface Area 9,638 sq. ft. (water surface area at the orifice elevation) Drainage Area _ 236,163 sq. ft. (on-site and off-site drainage to the basin) Impervious Area 173,393 sq. ft. (on-site and off-site drainage to the basin) Volumes Permanent Pool Volume --TO, 33.064 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 20,221 cu. ft. (volume detained above the permanent pool) Forebav Volume 7,620 _ cu. ft. gaprr; imately 20% of 101'al volume) Other parameters SAIDA' _ 4.1% (stnface area to drainage area ratio firom, DCVO table) Diameter of Orifice 1.5 _ in. (2 to 5 day temporary pool draw-down required) Design Rainfall 1 0 in. Design TSS Removal 90.0 % (minimum 85%required) Footnotes: When using the Division SAIDA tables, the correct SAIDA 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 nonstandard table entries. ' In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90%TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90%TSS removal. Form SWU-102 Rev 3.99 Page I of IL REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H. 1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initials a. The permanent pool depth is between 3 and 6 feet(required minimum of 3 feet). tM U b. The fore bay volume is approximately equal to 20% of the basin volume. Ptl& c. The temporary pool controls runoff from the design storm event. 1yq d. 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) j J. The basin length to width *ratio is greater than 3: 1. g. The basin side slopes above the permanent pool are no steeper than 3: 1. { _h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).. Vegetative cover above the permanent pool elevation is specified. � j. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right-of-way. _ IMIA_1. If the basin is used for sediment and erosion control during construction, clean out of the basin is n ' 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 detentions basin system is define:'. as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one)_ does X does not incorporate a vegetated filter at the outlet. This system (check one)_ does X does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention 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 the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75%'of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall 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 4. 5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4 5 feet in the forebay, the sediment shall be removed. BASIN DIAGRAI`I (fill in the blanks) p Permanent Pool Elevation 40 . 5 Sediment Re oval El._3 6 ..0 7.75 0 ------------- Sediment Removal Elevation 6 O 75% Bottom Ele atiom �4 - 5 % ----------------------------------- -------- ------- Bottom Elevation 34 . 5 250/1 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. I o f 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. Foam SWU-102 Rev 3.99 Page 3 of 4 %. All components of the wet detention basin system shall be maintained in good working order. 1 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: C .A. ( Drew ) Boggs III Title: President, Boggs Paving , Inc . Address: P.O. BOX 1609 , Monroe, NC 28111 -1609 Phone: 704-289-8482 Signature:_/ 2zr/ S-& Date: J-L1'-Op Note: The legally responsible party should not be a homeowners association unless more than 50%of the lots have been sold and a resident of the subdivision has been named the president. I, JI_4 ze- .5 2cjwn a Notary Public for the State of 1"b(441 (_41eol,,, , County of gry .oyF' do hereby certify that �Qr 4 • 66";4S personally appeared before me this day of h"M4 ZOOO , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, i i SEAL My commission expires_-T�^ .n�i i Form SWU-102 Rev 3.99 Page 4 of 4 - P► WK DICKSON LETTER OF TRANSMITTAL 909 Market Street ML!-�-'t!A W Wilmington, NC 28401 MAY 2 0 910.762.4200 0 FAX: 910.762.4201 DATE: 5/25/00 JOB NO.: 00109.80 BY. G TO: NCDENR- Division of Water Quality 127 Cardinal Dr. Ext. RE: Boggs Asphalt Plant Wilmington, NC 28405 Stormwater Project No. SW8 000329 Request for Additional Information - Response ATTENTION: Linda Lewis We are sending via: 0 Overnight Regular Mail 0 Pick-up 5_1 Hand Delivered The following items: Correspondence F_� Plans 0 Specifications FX Other as listed below: COPIES DATE NO. DESCRIPTION 2 5/28/00 1 Response to DWQ Comments 2 5/28/00 2 Revised Stormwater Plan & Stormwater Details 2 5/28/00 3 Revised Stormwater Narratives 2 5/28/00 4 Revised Stormwater Permit Applications & Supplements 2 5/28/00 5 Revised Stormwater Calculations 2 5/28/00 6 Wetland Evaluation, Land Management Group, Inc. THESE ARE TRANSMITTED as checked below: ex For Approval As requested Approved as submitted Returned for corrections For your use B For review and comment e Approved as noted Forward to subcontractor REMARKS: COPY TO: Mr. Carl Boggs, Boggs Paving, Inc. SIGNED: rv\� Response to NCDENR Division of Water Quality (1 E C E I V E D Request for Additional Information �unu( May 25, 2000 MAY 2 5 2000 Boggs Asphalt Plant �32c1 Stormwater Project No. SW8 000329 PRW 1. As the owner, you are not qualified to make the determination that no wetlands exist on the site, unless you have had training in the identification of wetlands, and have the Corps official permission to make this determination. Please have a person who has the education and experience make this call. Response: Please review the enclosed Wetland/Upland Evaluation by Land Management Group, Inc. performed by Rob Moul, MEM. No 404 wetlands are present on the site. 2. Please add the following items to the vicinity map: State Road number of Lanvale Drive (if any); the direction to Wilmington from the project; the distance from the nearest major road intersection to the project; and the nearest major road intersection. Response: Please see revise Vicinity Map. The exit off US 74 is approximately 7.0 miles west of Wilmington. 3. As discussed at the workshops last year, the forebay volume is supposed to be based on 20% of the permanent pool volume, the 1" volume. Please revise. Response: The forebay has been sized on 20% of the main basin volume provided below the permanent pool elevation for Ponds 1 and 2. 4. Please seal the design calculations. Response: Please see revised and sealed design calculation sheets. 5. Please report the impervious areas in square feet on the application. Response: Please see revised application. 6. Section III of the application for Pond 2 reports the impervious area as 4.8 acres, or 89% percent impervious, but the calculations and supplement both use 4.43 acres, or 82%. As a result, the SAMA ratio is too small, and the surface area provided is deficient. Please correct and submit revised plans, supplement and . calculations as needed. Response: Pond 2 has an impervious area of 173,393 sq. ft. with a percent impervious area of 73%. 7. The supplement for Pond 2 indicates that a 2" orifice will be used, but the plans and calculations show a 1.5" orifice. Please correct and submit revised plans or calculations. Response: Pond 1 and 2 will both have a 1.5" orifice, please see revised plans and calculations. S. In Section III of the supplement form, the sediment removal benchmarks should be reported as depths, not elevations. Essentially, the way it is written now, you will be cleaning out a 6' deep pond when the depth is 36'. This should be reported as 4.5', or 75% of 6. Response: The benchmarks were originally written as elevations, they have been revised as depths. 9. The surface areas reported for both ponds, are less than what is actually provided, based on the dimensions shown on sheet c-2. Please accurately report on the supplements what is provided in the pond, based on the dimensions provided. Response: The original required SA/DA surface areas were to include the surface area of the forebay also. The surface areas of the main basins have been revised to include the required SA/DA area not including the forebay. 10. There is a typo on the dimensions for Pond 1. The length should be 172.5', not 127.5'. Response: Please see revised plan sheets. 11. The grading of the perimeter grassed collection swales is of paramount importance in getting this runoff to the forebay of the ponds. Special conditions will be placed in the permit regarding the grading and the fact that the swales must empty into the forebays, and may not cause a bypass or short-circuiting of the pond. Response: The plans include inverts of the collection system. The perimeter access road is built at a high enough elevation to prevent stormwater from flowing off-site before entering the ponds. The access road serves as a levee. The only outlet off the property is through the ponds. 5:\PROJECTS\00109.80\Admin\NCDENR questions.doc Boggs Paving, Inc. Leland Asphalt Plant 11'E CE I Brunswick County, North Carolina Stormwater Narrative MAY 2 5 2000 Submitted to: NCDENR—Division of Water Quality DW@ March 12, 2000 PROJ # 5k)3 00(>52` Revised May 25, 2000 Stormwater runoff treatment for the proposed Boggs Paving, Inc. Leland Asphalt Plant will consist of two wet detention ponds. The Boggs property includes 10.90 acres with approximately 0.71 acres within the existing CSX Railway right-of-way. This 0.71 acres drain existing railway beds and is not included in the stormwater calculations. A perimeter drainage ditch encloses the property intercepting offsite drainage. The property drains into Banton Branch then into Mill Creek. A summary of the detention pond design is provided in Tables 1 and 2. The site layout and detention pond elevations and dimensions are provided in Plan Sheets 1 and 2. The property was divided into two drainage basins. Drainage Basin #1 drains the front half of the property along Fletcher Road and includes the plant foundation. Drainage Basin 41 contains 4.77 acres and is 79% impervious. Sheet flow from the roadway, parking areas and the plant foundation will be intercepted by grass swales and will flow to Detention Pond#1. The detention ponds were sized using 90% TSS removal in coastal counties without a vegetative filter. Forebay sizes are based on 20% of the provided main basin volume from 1.0 inches of runoff. Pond #1 includes an emergency spillway 0.5-ft above the peak 1.0-inch runoff pond elevation. Pond #1 has a 1.5-inch orifice that will drain the 13,334-ft3 temporary volume in 3.1 days. The pond will drain into the existing Fletcher Road ditch. Drainage Basin #2 drains the back half of the property along the CSX Railway and includes the sand and rock aggregate stockpile area. Drainage Basin #2 contains 5.42 acres and is 73% impervious. Sheet flow from the roadway and stockpile area will be intercepted by grass swales and will flow to Detention Pond #2. The emergency overflow pipe is 0.5 ft above the peak 1.0-inch runoff pond elevation. Pond #2 has a 1.5-inch orifice that will drain the 13,973-ft3 temporary volume in 3.2 days. The pond will discharge into the existing CSX drainage ditch. The roadways within the property are super-elevated or inclined to drain towards grassed swales on the inside of the property. A 20-ft grass border will be located on the inside of the perimeter road and around the detention ponds. Rip-rap protection will be provided at the detention pond entrances and outfalls. Provided temporary pool volumes exceed required temporary pool volumes due to the permanent pool surface area requirement (SA/DA). SdPROJECTS\00109.80\Hydro\DWQ Stormwater Narrative 5-25-OO.doc Boggs Asphalt Plant RO St Id Mill Rd NE 74 ssa ti sit cation- Boggs Asphalt Plant 1409 Eliah 74 do oe Id FaYe6eville 03 (D 71, rn sy Hill )C, apel Loop Rd SE 133 17 "JDLI,'F'-;J' CEIV 1415 MAY 2 PROD # :50"y AX) JZ mi 0.5 1 1.5 2 Streets98 Copynght 0 1988-1997,Microsoft Corporation and/or its suppliers.All rights reserved. Please visit our web site at hip Unnaps expedia.com. page 1 cuyy uruup 3::•fU,4 /-262-1iLb uay 25 2u1UJ iu _�J r. u1 O� C�SU.Ll0�6 � 9kw sss� %brinw,c�ore,✓IoGL`EercoG,aa P840P 9�sso-asz-ooc> 5',o6«rS2..a�..t S1.w sa 9V 9*A. rEi.4.. 980J�iry/iA /e,a�irenrrc q('C&kVzie,.W mm.1 May 18, 2000 Mr. Drew Boggs Boggs Paving, Inc. P. 0. Box 1609 Monroe, NC 28111-1609 RE: Results of Wetland/Upland Evaluation on 11 acre Boggs Asphalt Plant in Leland; NC Dear Mr. Boggs: I have completed my wetland evaluation of your 11 acre property near the intersection of Old Mill Road and Lanvale Road (SR 1438)just west of the"Kicking Mule" Package Store (see vicinity map). The property is bounded to the north by Old Mill Road; to the east by an automobile junk yard; to the south by the Seaboard Coast Line Railroad; and to the west by an undeveloped woodland parcel. The property's boundaries are very easy to follow since the site has 5-6 foot deep old drainage ditches around its perimeter, The northern front section of the site where the asphalt plant is located is built upon non- hydric"Foreston Soils"which have nowetland Inclusions. The southern section has hydric soils due to its low chroma colors but exhibits very friable drained soil profiles (see photos). It appears the large old railroad canal has lowered ambient water tables to the point that the site exhibits no wetland hydrology. In addition, there are no hydrophytic plants left on the property from site clearing activities which would Indicate obligate wetland conditions. Therefore, I conclude that no 404 wetlands are present and the 11 acre site does not meet the 1987 Army Corps 3 Parameter wetland definition. Eoggs Lroup hax:ro4-ht2-112b May 25 2UU) 15:UU F.U7 I have enclosed some pictures of the soils and site conditions and a county soil map and vicinity map. Should you need anymore information, please feel free to contact me at your convenience. Sincerely, R m S7cv, Rob Moul, MEM Environmental Consultant RM/ghd CC: E. G. tale Enclosures: Vicinity map Soils map Pictures t09'g5 '�r'OUr Fax:rU11 he—ll2U 118y Z ZUUU n:UU F'. UJ P, VICINITY MAP &�`�;• J spa F �• .'. ~` +~*�.'�i�. 5 ` dry rl i n e e\ �ti'lls!fl5f 1 '.LCkE 4a GFEZK 5 T _ \\ :�' `�• -to '' a art Lv:-•?., we 4 W uI;L PG � ww— o! 0 �w 74 67 - - - i 17 w f?!P`-- 'S to�- \� ,a•,,,` �,p, ,. N- � w C� y C91 M:2 F In,n SCALE:1"=1 MILE LAND MANAGEMENT GROUP, INC. r `tM .'G'. .-.."n14 '. '2 \l' i w �1.. I X •�aY'j.l Y t.y- l' 01 Mir.7ifTT y 3 ,2 fir � Y I r I � v I I �`WR I erl� .�tt Or � I 1W 6oggs Group Fax:ru4 -I 2b 113g 25 210C 15:C2 P. _5 PLACEMENT OF PLANT SITE OVER NONHYDRIC SOILS n � ,fir 6! 1 �_1,.✓`- `�' 1.. ! i +�x}f"C: : r F f • ` I , 4 i F p eN 1 T i<, r ' r'fir w UPLAND SOILS AT STORMWATER POND AREAS R I, � A 1 hh r�p}.:i:m•1.��,: . I r + x 4ri � �{ � �ah i e ' '•� . LAND MANAGEMENT GROUP, INC. s41P • 's A a I �. 1 ra r IAv`I F y `•. I}'k. Ill y a ��1� i nri r}a��!i^'Jm M?�k i(GI' t •r,:'� '' � �' r �J' s tix�. �JNwlla�`i y tw'4i�..q lF'�fl 1 ix� � i.ir t°ow 5r w yif5 f -.p � II 1 � N� 4 ��Y F C( 1j tV Iy t rlA r +I. of 3• � �'JI,.a i. �,, } ,.;J�"i' � � � A ', yrui r •� �-��`-' y.� l i.2i1 �r 'Iv(L. y i v i�• r :a c��..i'u•G{],.f��1 9 Y C v n "Yq 5A.11♦ S v; q`•N"4'§'�� ��°'i bra �k" v' 1� r�•Pwn'r"'-�'�u�'+1r3y�_ .1 S� . i} (d j����ra ir� i rll, m 'kiM i'ht�hi lP.a��7Y c •z � • 7i i W y i I i 4, A' •'v641A T� [1 1, vr4r w c i 't" r K 11i(r 1'� 1 fit, v 4v+"r5 M1 LytJR 9 5 Y ! ltl r f VjM t � VYM Y � t Y tyr , 'r>ju 4441 1jq Q5Y{+1'iC� IrIGST Y�• 1 ;�Pkr �tYmk i'yttl ^A�.W��d Y�"'�rl Y. 'Cry fa '�i.a,>• • 1} � �t.`�^WI• Nn A§r•�! r 1 r it f Af ^� t 1 h� a'vy�i.v�9M1RON ,e,4 + • ' , State of North Carolina Department of Environment s and Natural Resources t �, Wilmington Regional Office James B. Hunt,Jr., Governor Bill Holman, Secretary N C mom wa) E N R D Quality NORTH CAROLINA DEPARTMENT OF Division of Water li Q t ENVIRONMENT AND NATURAL RESOURCES April 26, 2000 Mr. Carl Boggs, President Boggs Paving, Inc. PO Box 1609 Monroe,NC 28 1 1 1-1 609 Subject: ACKNOWLEDGMENT OF RECEIPT AND REQUEST FOR ADDITIONAL INFORMATION Stormwater Project No. SW8 000329 Boggs Asphalt Plant Brunswick County Dear Mr. Boggs: The Wilmington Regional Office received a Stormwater Management Permit Application for Boggs Asphalt Plant on March 24,2000. 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. As the owner,you are not qualified to make the determination that no wetlands exist on the site, unless you have had training in the identification of wetlands, and have the Corps official permission to make this determination. Please have a person who has the education and experience make this call. 2. Please add the following items to the vicinity map: State Road number of Lanvale Drive (if any); the direction to Wilmington from the project; the distance from the nearest major road intersection to the project; and the nearest major road intersection. 3. As discussed at the workshops last year, the forebay volume is supposed to be based on 20% of the permanent pool volume, the 1" volume. Please revise. 4. Please seal the design calculations. 5. Please report the impervious areas in square feet on the application. 6. Section III of the application for Pond 2 reports the impervious area as 4.8 acres,or 89%percent impervious, but the calculations and supplement both use 4.43 acres, or 82%. As a result, the SA/DA ratio is too small, and the surface area provided is deficient. Please correct and submit revised plans, supplement and calculations as needed. 7. The supplement for Pond 2 indicates that a 2" orifice will be used,but the plans and calculations show a 1.5" orifice. Please correct and submit revised plans or calculations. 8. In Section III of the supplement form,the sediment removal benchmarks should be reported as depths,not elevations. Essentially, the way it is written now,you will be cleaning out a 6'deep pond when the depth is 36'. This should be reported as 4.5', or 75% of 6. 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. Boggs April 26, 2000 Stormwater Project No. SW8 000329 ---------------------------------------------- 9. The surface areas reported for both ponds,are less than what is actually provided,based on the dimensions shown on sheet C-2. Please accurately report on the supplements what is provided in the pond, based on the dimensions provided. 10. There is a typo on the dimensions for Pond 1. The length should be 172.5', not 127.5'. 11. The grading of the perimeter grassed collection swales is of paramount importance in getting this runoff to the forebay of the ponds. Special conditions will be placed in the permit regarding the grading and the fact that the swales must empty into the forebays, and may not cause a bypass or short-circuiting of the pond. 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 May 26, 2000, 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 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 ofNCGS 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) 395-3900. Sincerely, orl'�C Linda Lewis Environmental Engineer - RSS/arl: S:\WQS\STORMWAT\ADDINFO\000329.APR cc: Linda Lewis Margaret Gray 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 Date Received reePaid I P_rmit Number 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 orio=J I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation,individual, etc.who owns the project): Boggs Paving, Inc . 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): C.A. Boggs, President 3. Mailing Address for person listed in item 2 above: P.O. Box 1609 city: Monroe State: NC zip:_ 28111 -1609__ Telephone Number: f 704 1 289-8482 4. Project Name (subdivision,facility, or establishment name-should be consistent with project name on plans,specifications,letters, operation and maintenance agreements,etc.): Boggs Asphalt Plan - Plana 5. Location of Project(street address): Fletcher Road NE @ Lanvale In rsPrtinn City: Leland, NC county: Brunswick 6. Directions to project(from nearest major intersection): From Wilmington on US 74, exit at Leland south on Lanvale Road for 0 .25 miles _left onto Flet h r Drive fnr 0 2 milPr to cite 7. Latitude: 34° 15 Longitude: 78°03 ' 00° of project ro'ect S. Contact person who can answer questions about the project: Name: Margaret Gray Telephone Number: ( 910 ) 762-4200 II. PERMIT INFORMATION: I. Specify whether project is (check one): X New Renewal Modification Form SWU-101 Version 3.99 Page I of 4 2. If this application is being sub tted as the result of a renewal or modification to an existing permit,list the existing permit number "?H and its issue date (f known) 11/A 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 Perm t _X_NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. M. 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 will be routed to one of two wet detention nnnrie _ The ponds will hold the first 1 n inches of rain and detain amounts above 1 .0 inches before discharging offsite . 2. Stormwater runoff from this project drains to the Cape Fear River basin. 3. Total Project Area: 10 • 90 acres 4. Project Built Upon Area: 78 . 7 (0. 71 Ac in CSX ROW) 2 5. How many drainage areas does the project have? 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project,attach an additional sheep with the information for each area provided in the same format as below. Eases rxEort o M : e, r rDrainagekAea51 s .Dramage AL2a2x ..M2`.za Receiving Stream Name Banton Branch Banton Receiving Stream Class SW SW Drainage Area 4 .77 Ac 5 .42 A Existing Impervious*Area 0 .0 AC 0 .0 Ac. Proposed Impervious"Area 3 . 78 Ac 4 . 80 Ac %Impervious*Area(total) 80% 89% �. � t � yi< Irrt ervtous Surface4rea "� �. 'Dramage.Asea�1 � , ,`���'�` Dr�arnua eArea2r z a „ On-site Buildings 0.25 Ac 0 .0 Ac On-site Streets 0 . 93 AC 0 . 48 Ac - On-site Parking 2 . 60 AC 4 . 32 AC On-site Sidewalks 0 .0 Ac 0 .0 Ac Other on-site 0 .0 Ac 0 .0 Ac Off-site 0 .0 AC 0 .0 Ac Total: 3 .78 Ac Total: 4 .80 AC 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? No off-site drainage . 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 373, 744 square feet of any-lot shall be covered by structures or impervious materials. Impervious materials include asphalt,gravel, concrete,brick,stone,slate or similar material but 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 runoff from outparcels or future development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted. By your signature below,you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them,that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State,and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s)listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at(919) 733-5083 for the status and availability of these forms. Form SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off-Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Ip t�$Is • Original and one copy of the Stormwater Management Permit Application Form J{� • One copy of the applicable Supplement Form(s) for each BMP • Permit application processing fee of$420 (payable to NCDENR) • 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 g date -Mean high water line -Dimensioned property/project boundary -Location map with named streets or NCSR numbers -Original contours,proposed contours,spot elevations,finished floor elevations -Details of roads,drainage features,collection systems, and stormwater control measures -Wetlands delineated,or a note on plans that none exist -Existing drainage(including off-site),drainage easements,pipe sizes,runoff calculations -Drainage areas delineated -Vegetated buffers (where required) VIL AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf,please complete this section. Designated agent(individual or firm): W.K. Dickson , Attn . Margaret Gray Mailing Address: 909 Market Street city: Wilmington State: NO Zip:?8401 Phone: ( 910 762-4200 Fax: 1 910 ) .762-4201 VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) C . A. RnQQ S certify that the information included on this permit application form is, to the best of my knowledge,correct and that the project will be constructed in conformance with the approved plans,that the required deed restrictions and protective covenants will be recorded,and that the proposed project complies with the requirements of 15A NCAC 2H .1000. 0 Signature:��t�(^l [ . Y , � � Date: J-2f-OCJ Form SWU-101 Version 3.99 Page 4 of 4 Permit No. SwF 000 3 ZC1 (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources WKD 00109 .80 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. I. PROJECT INFORMATION Project Name: Boggs Asphalt Pldnt - Leland Contact Person: Margaret Gray Phone Number: ( 910 ) 762-4200 For projects with multiple basins, specify which basin this worksheet applies to: #1 elevations Basin Bottom Elevation 35 . 5 8. (floor of the basin) Permanent Pool Elevation ft. (elevation of the orifice) Temporary Pool Elevation 44-5 43.eft. (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 9 ,577 sq. ft. (water surface area at the orifice elevation) Drainage Area 4 . 77 ac. (on-site and off-site drainage to the basin) Impervious Area 3 . 78 ac. (on-site and off-site drainage to the basin) volumes 33 423 Permanent Pool Volume 6JtOD cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume ft. (volume detained above the permanent pool) Forebay Volume 2 , 951 cu. ft. (approximately 20% of total volume) Other parameters SA/DAI 4 . 6% (surface area to drainage area ratio from DWQ table) Diameter of Orifice 1 .5 in. (2 to 5 day temporary pool draw-down required) Design Rainfall 1 .0 in. Design TSS Removal 2 90% % (minimum 85% required) Form SWU-102 Rev 3.99 Page I of 4 Footnotes: I When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non- standard table entries. '- In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 907o TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90%TSS removal. II. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initials 1�1_ky - a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). N4-- b. The forebay volume is approximately equal to 20% of the basin volume. A-4/ c. The temporary pool controls runoff from the design storm event. d. 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. It. 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. U" j. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. 1. If the basin is used for sediment and erosion control during construction, clean out of the Al basin is specified prior to use as a wet detention basin. /w in. A mechanism is specified which will drain the basin for maintenance or an emergency. M. 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) 0 does 0 does not incorporate a vegetated filter at the outlet. This system (check one) 0 does N does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention 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 the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall 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 37 .0 feet in the main pond, the sediment shall be removed. \ When the permanent pool depth reads 39 . 25 feet in thefbrebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) p Permanent Pool Elevation 41 • 5 Sediment Re oval El. 39 . 25 7 75 0 �- - Sediment Removal Elevation 37 .0 F25% BottomEle ation 38 . 5 C/o ---------------------------------------------Bottom Elevation 35 • 5 FOREBAY MA IN 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 Rev 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: C.A. ( Drew ) Boggs III 'title: President, Boggs Paving, Inc . Address: P.O. Box 1609 , Monroe, NC 28111 -1609 Phone: 704-289-8482 /� Signature: / �2� ,.z/-) Date: Note: The legally responsible party should not be a homeowners association unless more than 50%of the lots have been sold and a resident of the subdivision has been named the president. I, /J1 Qne� 5 �k?dW i- a Notary Public for the State of )-)Ir `Fk �tifi.�L County of hfdd) do hereby certify that Coe A -40 personally appeared before me this �9 OtL day of &-a r-r'L, 2600 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SEAL My commission expiresn Form SWU-102 Rev 3.99 Page 4 of 4 Permit No. SW E CXX_)329 (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources WKD 00109 . 80 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. I. PROJECT INFORMATION Project Name: Boggs Asphalt Plant - Leland Contact Person: Margaret Gray Phone Number: (910 1 762-4200 For projects with multiple basins, specify which basin this worksheet applies to: #t 2 elevations Basin Bottom Elevation 34 .5 ft. (floor of the basin) Permanent Pool Elevation 40 . 5 ft. (elevation of the orifice) Temporary Pool Elevation 42 .0 ft. (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 11 ,097 sq. ft. (water surface area at the orifice elevation) Drainage Area 5 . 42 ac. (on-site and off-site drainage to the basin) Impervious Area 4 .43 ac. (on-site and off-site drainage to the basin) volumes Permanent Pool Volume 40,395 cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume 18 , 747 cu. ft. (volume detained above the permanent pool) Forebay Volume 3,363 cu. ft. (approximately 20% of total volume) Other parameters SA/DAl 4 . 7 (surface area to drainage area ratio from DWQ table) Diameter of Orifice 2 .0 in. (2 to 5 day temporary pool draw-down required) Design Rainfall 1 .0 in. Design TSS Removal z 90 % (minimum 85% required) Form SWU-102 Rev 3.99 Page 1 of 4 Footnotes: l When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious %and permanent pool depth. Linear interpolation should be employed to determine the correct value for non- standard table entries. 2 In the 20 coastal counties,the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 9017c TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90%TSS 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 211 .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. Applicqnts Initials r� a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). ti�U✓ b. The forebay volume is approximately equal to 20% of the basin volume. A� c. The temporary pool controls runoff from the design storm event. t/Y/4�_ d. 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. M g. The basin side slopes above the permanent pool are no steeper than 3:1. It. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail), itl/� i. Vegetative cover above the permanent pool elevation is specified. r!/ ' j. A trash rack or similar device is provided for both the overflow and orifice. k. A recorded drainage easement is provided for each basin including access to nearest right- nn� of-way. 1. If the basin is used for sediment and erosion control during construction, clean out of the "Y basin is specified prior to use as a wet detention basin. in. 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) 0 does );l does not incorporate a vegetated filter at the outlet. This system (check one) 0 does b does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention 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 the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall 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 36 .0 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 38 . 25 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) p Permanent Pool Elevation 40 . 5 Sediment Re oval El. 38 . 25 75 0 -------------- - Sediment Removal Elevation 36 . 0 L25 Bottom Etc anon 37 . 5 % --------------------------------------------- -- Bottom Elevation 34 . 5 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. Forrn SWU-102 Rev 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: C .A. ( Drew ) Boggs III Title: President, Boggs Paving, Inc . Address: P.O. Box 1609 , Monroe, NC 28111 -1609 Phone: 704-289-8482 Signature: 42/L �a 6e;» Date: j-Z1 -oo Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and -��a resident of the subdivision has been named the president. I, ✓f 4'e— s B2uwrt , a Notary Public for the State of i-)of`l'L) CLt20linc , County of 1—)t4v AQ-oyF e- do hereby certify that C'a r 14 . &w 1, 22 personally appeared before me this a Vtt day of 121a-cjn Zoo o , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SEAL 44"1"- My commission expireseLd* Form SWU-102 Rev 3.99 Page 4 of 4 + r a 21i` Date Received Fee Paid Permit Number 3-2 -D0 1 4zolif 0031Z5 SW8 000329 State of North Carolina Department of Environmental and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This farm may be photocopied for use as an original L GENERAL INFORMATION 1. Applicants name(specify the name of the corporation, individual, etc. who owns the project): Boggs Paving, Inc. 2. Print Owner/Signing Official's name and title(person legally responsible for facility and compliance): C.A. Boggs, President 3. Mailing Address for person listed in Item 2 above: P.O. Box 1609 City: Monroe State: NC Zip: 28111-1609 Telephone Number: ( 704 ) 289-8482 4. Project Name (subdivision, facility, or establishment name-should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Boggs Asphalt Plant- Leland 5. Location of Project(street address): Fletcher Road NE @ Lanval Intersection City: Leland County: Brunswick 6. Directions to project(from nearest major intersection): From Wilmington west on US 74, exit at Leland south on Lanvale Road for 0.25 miles, left onto Fletcher Drive for 0.2 miles to site on left. 7. Latitude: 34015'00" Longitude: 78003'00" of project. 8. Contact person who can answer questions about the project: Name: Margaret Grav Telephone Number( 910 ) 762-4200 II. PERMIT INFORMATION: 1. Specify whether project is (check one): X_New Renewal Modification Form SWU-101 Version 3.99 Pagel of4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number N/A and its issue date (if known) N/A 3. Specify the type of project(check one): _Low Density X High Density _Redevelop _ General Permit Other 4. Additional Project Requirements (check applicable blanks): _CAMA Major X Sedimentation/Erosion Control 404/401 Permits X NPDES Sormwater Information on required state permits can be obtained by contacting the Customer Service Center at I- 877-623-6748 M. 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 will be routed to one of two wet detention ponds. The ponds will hold the first 1.0 inches of rain and detain amounts above 1.0 inches before discharging offsite. 2. Stormwater runoff from this project drains to the Cape Fear River Basin. 3. Total Project Area: 474,800_sq. ft. 4. Project Built Upon Area 71.2% (Please note 30,930 sq. ft. of property within CSX Transportation ROW) 5. How many drainage areas does the project have? 2 6. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach and additional sheet with the information for each area provided in the same format as below. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Banton Branch Banton Branch Receiving Stream Class SW SW Drainage Area 207,800 sq. ft. 236,163 sq.ft. Existing Impervious*Area 0.0 sq. ft. 0.0 sq. ft. Proposed Impervious* Area 164,700 sq. ft. 173,393 sq. ft. % Impervious* Area (Total) 79.3 % 73.4% Impervious* Surface Area Drainage Area 1 Drainage Area 2 On-Site Buildings 10,900 sq. ft. 0.0 sq. ft. On-Site Streets 40,500 sq. ft. 20,900 sq. ft. On-Site Parking 113,300 sq. ft. 152,493 sq. ft. On-Site Sidewalks 0.0 sq. ft. 0.0 sq. ft. Other On-Site 0.0 sq. ft. 0.0 sq. ft. Off-Site 0.0 sq. ft. 0.0 sq. ft. Total: 164,700 sq. ft. Total: 173,393 sq. ft. *hnpervious 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 7. How was the off-site impervious area listed above derived? NO off-site d rd i n age . 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. I. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number NSA as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 'P 2. No more than 373, 744 square feet of any-lot shall be covered by structures or impervious materials. Impervious materials include asphalt,gravel,concrete,brick,stone, slate or similar material but 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. S 5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity and performance of the system as permitted. By your signature below,you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land,that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at(919)733-5083 for the status and availability of these forms. - -- ^" 1 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 Supplement Form SWU-109 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. t Ffe • 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$420 (payable toNC • Detailed narrative description of stormwater treatment/management • Two copies of plans and specifications,including: Aw -Development/Project name -Engineer and firm -Legend -North arrow -Scale -Revision number&date -Mean high water line -Dimensioned property/project boundary -Location map with named streets or NCSR numbers -Original contours,proposed contours,spot elevations,finished floor elevations -Details of roads, drainage features,collection systems,and stormwater control measures -Wetlands delineated,or a note on plans that none exist -Existing drainage (including off-site),drainage easements,pipe sizes,runoff calculations -Drainage areas delineated -Vegetated buffers (where required) VIL AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf,please complete this section. Designated agent(individual or firm): W.K. Dickson , Attn . Margaret Gray Mailing Address: 909 Market Street city: Wilmington State: NC zip:28401 Phone: ( 910 ) 762-4200 Fax: ( 910 ) _ 762-4201 VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) A Rnggs certify that the information included on this permit application form is, to the best of my knowledge,correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded,and that the proposed project complies with the requirements of 15A NCAC 2H .1000. Signature: a l C - Date: T 2�-0D Form SWU-101 Version 3.99 Page 4 of 4 Fk WK p OICKSON E,.,u4«s•Platers•Surveyors LETTER OF TRANSMITTAL 909 Market Street Wilmington,NC 28401 I910p62-4200 • FAX(910)7r2-4201 � TO: NCDENR/DWQ DATE: 3/24/00 JOBNO.: 00109.80(l) 127 Cardinal Dr Est RE: Boggs Paving—Leland Asphalt Plant Wilmington, NC 28405 Brunswick County ATTENTION: Linda Lewis MAR G 4 "" We are sending you �s Attached F7 Under separate cover VIA: Overnight F-1 Regular Mail F—] Pick-up 0 Courier The following items: Shop Drawings Prints Plans Samples Specifications Copy of Letter xChange Order COPIES DATE NO. DESCRIPTION 2 sets Stormwater Plan&Stormwater Details 2 sets Stormwater Narratives 2 sets Stornnvater Peanut Applications & Supplements 2 sets Stormwater Calculations 1 $420.00 application fee THESE ARE TRANSMITTED as checked below: eFor Approval 8 As requested e Approved as submitted e Returned lot corrections For your use For review and comment Approved as noted Remarks: Linda—enclosed stormwater documents for permitting. Do not hesitate to call if you need anything else.Thanks, G V COPY TO: File, Drew Boggs SIGNED: Margaret Gray