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HomeMy WebLinkAboutSW8051005_CURRENT PERMIT_20051116STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW �):51�6: DOC TYPE � CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE lP YYYYMMDD �OF WATFRQ Michael F Easley, Governor p 6 William G Ross, Jr, Secretary North Carolina Department of Environment and Natural Resources a Alan W Klimek, P E Director Division of Water Quality November 16, 2005 Mr Ted Kaniuka, Superintendent Pender County Schools 925 Penderlea Highway Burgaw, NC 28425 Subject Stormwater Permit No. SW8 051005 Burgaw Elementary School Addition High Density Project Pender County Dear Mr Kaniuka The Wilmington Regional Office received a complete Stormwater Management Permit Application for Burgaw Elementary School Addition on November 14, 2005 Staff review of the plans and specifications has determined that the protect, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H 1000 We are forwarding Permit No SW8 051005 dated November 16, 2005, for the construction of the subject project This permit shall be effective from the date of issuance until November 16, 2015, and shall be subject to the conditions and limitations as specified therein Please pay special attention to the Operation and Maintenance requirements in this permit Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P O Drawer 27447, Raleigh, NC 27611-7447 Unless such demands are made this permit shall be final and binding If you have any questions, or need additional information concerning this matter, please contact Robert Gordon, or me at (910) 796-7215 Slr�'A'1_6c ' Edward Beck Regional Supervisor Surface Water Protection Section ENBlydg S 1WQSISTORMWATERIPERMIT1051005 nov05 cc Phil Norris, PE, Norris, Kuske & Tunstall Warren Holt, Pender County Building Inspections Robert Gordon Wilmington Regional Office Central Files North Carolina Division of Water Quality 127 Cardinal Onve Extension Phone (910) 796 7215 Customer Service 1 -877-623 6748 Wilmington Regional Office Wilmington, NC 28405-3845 FAX (910) 350 2004 Internet h2o enr state nc us one NhCal ohria An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper latura!!y State Stormwater Management Systems Permit No SW8 051005 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Pender County Schools Burgaw Elementary School Addition 3 blocks from the intersection of Bndgers & Wright St, Burgaw - Pender County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H 1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit This permit shall be effective from the date of issuance until November 16, 2015, and shall be subject to the following specified conditions and limitations I. DESIGN STANDARDS 1 This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data 2 This stormwater system has been approved for the management of stormwater runoff as described in Section 16 on page 3 of this permit The stormwater control has been designed to handle the runoff from 112,545 square feet of impervious area There is 91,830 square feet of existing impervious area on site that will not be treated by the proposed stormwater system 3 The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans The built -upon area for the future development is limited to 8,154 square feet 4 All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans 5 The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system Page 2 of 7 State Stormwater Management Systems Permit No SW8 051005 6 The following design criteria have been provided in the wet detention pond and must be maintained at design condition a Drainage Area, acres Onsite, ft Offsite, ft2 b Total Impervious Surfaces, ft2 c Design Storm, inches d Pond Depth, feet e TSS removal efficiency f Permanent Pool Elevation, FMSL g Permanent Pool Surface Area, ft2 h Permitted Storage Volume, ft3 Temporary Storage Elevation, FMSL I Controlling Orifice k Permitted Forebay Volume, ft3 1 Receiving Stream/River Basin m Stream Index Number n Classification of Water Body il. SCHEDULE OF COMPLIANCE 4 317 188,025 0 112,545 1 4 90% 300 17,408 11,461 3060 2 0" 0 pipe 8,674 Osgood Branch 1 Cape Fear 18-74-39-1 " C Sw" 1 The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface 2 During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately 3 The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to a Semiannual scheduled inspections (every 6 months) b Sediment removal c Mowing and revegetation of slopes and the vegetated filter d Immediate repair of eroded areas e Maintenance of all slopes in accordance with approved plans and specifications f Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping g Access to the outlet structure must be available at all times Page 3 of 7 State Stormwater Management Systems Permit No SW8 051005 4 Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ The records will indicate the date, activity, name of person performing the work and what actions were taken 5 Decorative spray fountains will be allowed in the stormwater treatment system, subject to the following criteria a The fountain must draw its water from less than 2' below the permanent pool surface b Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond c The falling water from the fountain must be centered in the pond, away from the shoreline d The maximum horsepower for a fountain in this pond is 118 horsepower 6 The facilities shall be constructed as shown on the approved plans This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data 7 Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation Any deviations from the approved plans and specifications must be noted on the Certification A modification may be required for those deviations 8 If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility 9 Access to the stormwater facilities shall be maintained via appropriate easements at all times 10 The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below a Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc b Project name change c Transfer of ownership d Redesign or addition to the approved amount of built -upon area or to the drainage area e Further subdivision, acquisition, lease or sale of all or part of the project area The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought f Filling in, altering, or piping of any vegetative conveyance shown on the approved plan 11 The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction 12 A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction Page 4 of 7 State Stormwater Management Systems Permit No SW8 051005 13 The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate The approval of this request will be considered on its merits and may or may not be approved The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request 2 Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215 6A to 143-215 6C 3 The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction 4 In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems 5 The permittee grants DENR Staff permission to enter the property during normal business hours for the pur ose of inspecting all components of the permitted stormwater management facility 6 The permit maybe modified, revoked and reissued or terminated for cause The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition 7 Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual 8 Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit 9 The permittee shall notify the Division any name, ownership or mailing address changes within 30 days Permit issued this the 1 fit" day of November NORTH C ROOLINA ENVIRONMENTAL MANAGEMENT COMMISSION fo limek, P E , Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 State Stormwater Management Systems Permit No SW8 051005 Burgaw Elementary School Addition Stormwater Permit No SW8 051005 Pender County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications The checklist of items on page 2 of this form is included in the Certification Noted deviations from approved plans and specification Signature Registration Number Date SEAL Page 6 of 7 State Stormwater Management Systems Permit No SW8 051005 Certification Requirements 1 The drainage area to the system contains approximately the permitted acreage 2 The drainage area to the system contains no more than the permitted amount of built -upon area 3 All the built -upon area associated with the project is graded such that the runoff drains to the system 4 All roof drains are located such that the runoff is directed into the system 5 The outlet/bypass structure elevations are per the approved plan 6 The outlet structure is located per the approved plans 7 Trash rack is provided on the outlet/bypass structure 8 All slopes are grassed with permanent vegetation 9 Vegetated slopes are no steeper than 3 1 10 The inlets are located per the approved plans and do not cause short- circuiting of the system 11 The permitted amounts of surface area and/or volume have been provided 12 Required drawdown devices are correctly sized per the approved plans 13 All required design depths are provided 14 All required parts of the system are provided, such as a vegetated shelf, and a forebay 15 The required system dimensions are provided per the approved plans cc NCDENR-DWQ Regional Office Warren Holt, Pender County Building Inspections Page 7of7 N KT #05200 u RL - S „� State of North Carolina TC Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This farm may be photocopied for use as an original I GENERAL INFORMATION I Applicants name (specify the name of the corporation, individual, etc who owns the project) Pender County Schools _ 2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance) Ted Kanwka, Superintendent Mailing Address for person listed in item 2 above 925 Pendedea Highway City _ Burgaw_ _ _ State NC Zip 28425 Telephone Number 910 259-2187 4 Project Name (subdivision, facility, or establishment name — should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc } Bur�aw Elementary School Addition Location of Project (street address) Wright Street City Burg aw County Pender 6 Directions to project (from nearest major intersection) From the intersection of NC 53 & US 117, take NC 53 south to Bridgers Street Take left onto Bridgers St Follow Bridgers St to Wright St Turn left onto Wnght St School is 3 blocks on right Latitude 340 33' 29" Longitude 770 55' 41" of project Contact person who can answer questions about the project Name _ J Phillip Norris, P E �---- Telephone Number 910 343-9653 II PERMIT INFORMATION Specify whether project is (check one) X New Form SWU-101 Version 3 99 Page 1 of 4 Renewal Modification f f I ' II1(ar sl r ,1>(i f },JII1, ' i r' 1 f IF ' 'rl f it =f',fl' Is if ' J1 lit ' f111A et f�t, I 1, z .� I r� '� r . +i, ,3 �� ! _�t 1 f f' ' . , vI t,� �w �� t 3•; r ' 1 'u 1 'Al „{ -w A i �L '—r r.:,r°i ,++ ft iiJ, I r c _ -� „oil ;J,)) � W_ i _f f{ f j 'C �I I� ►r, ' 'I'1 C 7 + I 2 If this application is being submitted as the result of a renewal or modification to an existing permit, list the Existing permit number NIA And its issue date (if known) NIA 3 Specify the type of project (check one) Low Density X High Density Redevelop General Permit Other 4 Additional Project Requirements (check applicable blanks) CAMA Major X Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748 III PROJECT INFORMATION I In the space provided below, summarize how stormwater will be treated Also attach a detailed narrative (one to two pages) describing stormwater management for the project Retention Pond 2 Stormwater runoff from this project drains to the Cape Fear River Basin 3 Total Project Area 13 93 AC 4 Project Built Upon Area 33 68 % 5 How many drainage areas does the project have? 1 6 Complete the following information for each drainage area If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below Basin Information Drama a Area I Drainage Area 2 Receiving Stream Name Osgood Branch Receiving Stream Class C Swam Drainage Area 188,025 SF 14 317 AC Existing Impervious * Area 0 Proposed Impervious* Area 112,545 SF / 2 584 AC % Impervious* Area total 60% Impervious* Surface Area Drainage Area I Drainage Area 2 On -site Buildings 41,870 SF / 0 961 AC On -site Streets 0 On -site Parking 59,841 SF 11 374 AC On -site Sidewalks 2,980 SF 10 068 AC Other on -site (Future)_8,154 SF 10 187 AC Off -site 0 Total 112,545 SF 12 584 AC I Total " Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas sidewalks, gravel areas, etc I-ECEIVED Form SWU-101 Version 3 99 Page 2 of 4 Nov o 3 zoos VY , Ir f1,Y 'f t ` 1 IF I , - f1i p1 rF , I t I I ell rou !E 1+'F1 , Yltl, ' l r 1.) • iSEE F f I f r Ilf I i !�! +' :"'ll / I � r! 1 re I 'j ,rl+ +ti i� 1 � rvril iti7f , How was the off -site impervious area listed above derived? NIA IV DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment 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 112,545 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 ofswimming pools 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 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 Form SWU-103 Form S WU-104 Form SWU-105 Form SWU-106 Form SWU-107 Form SWU-108 Form SWU-109 Wet Detention Basin Supplement Infiltration Basin Supplement Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Underground Infiltration Trench Supplement Neuse River Basin Supplement Innovative Best Management Practice Supplement Form SWU-101 Version 3 99 Page 3 of 4 _ rw I � ~ � r ! �/ J f + lr r +t j i' � '�� f l�l � � + 1 � r �' rt 1 ' -� � �, + � i t a .. ' + � I a ,, r 1, . � ,� "'� IE11 ��� F t � 1 + '' 1`r � � � + � lr �. + 1 , 7 .. � +r r a r� S + � � � li � � 4 1 � !, , � 1 a � f � 3 �+ fa � 1} � 1 + i � 1 � 3 + r it i 1 i { � + 1 3 � � 1 � t� t , � 1 � 1 � 1 3 r � � i i 3 i r t t } i 1 � �1 .. rr 1 + I, 1 ' S r � t r � � + +' 4 r i £ . 1+ f �� � +ir' � + ,1 � - _� 1� +! � � t r % + ,r � ,f r ' 1 ry r ' � + , /e i �'r + 11 f t � � t 1, 1 i '� 1, � i 3 _ t rr �+� 1 � fr � + + 1 1 ` ' i A 1 + �r I 1 � 7 t � � f+ �f 1 1 1 � 1F r! + ff+ t r It � f �f� � "� �1r �r1,3,+ r 1, '� %�1�1 ire , � � ]� + 1 r 1 + Ir 1 ++ + + +� + + rf 1J 1�l+�1 +� � t � 1 f . + ! + ' + � � J �� 1 IFt i � f )3 3 1 l a v � t a + ri r� �+ � � + �f 1 J1 e � r 1 t rt 1 a 1 { r �j�+ 3 1 I i+ .. 1! � I + ' ++ 1 a rs f S ! � r< + F } r� 1 � { + r �� ✓ 1 7 ' a Vl SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office Please indicate that you have provided the following required information by initialing in the space provided next to each item • Original and one copy of the Stormwater Management Permit Application Form • One copy of the applicable supplement form(s) for each BMP • Permit application processing fee of $42&(payable to NCDENR) $4 100. 00 • Detailed narrative description of stormwater treatment / management • Two copies of plans and specifications, including - Development / Project name - Engineer and firm - Legend North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property / project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VU AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section J Phillip Norris, P E Designated agent (individual or firm) Norris, Kuske & Tunstall Consulting Engineers, Inc Mailing Address 902 Market Street City Wilmington State NC Zip 28401 Phone (910) 343-9653 Fax (910) 343-9604 VIII. APPLICANT'S CERTIFICATION 1, (print or type name of person listed in General Information, item 2) Ted Kaniuka, Superintendent , 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 protect complies with the requirements of 1 SA NCAC 2H 1000 Signature Date Form SWU-101 Version 3 99 Page 4 of 4 r , �}ai J}II , E i �s I r rk�rrt''l .F! J'1 3'i+ , TJ, rJ) r II+iF��,ll +] i ' i,l.) iJ II,. '► „I, r1'sf++,r , I l f d -11 _t14li,f. A fillA 1))D if riE rr + r ! r,3 't"I I 1 f .i l'lll#+, !J,},ilV� vl Jill I + , , IS 1 , !' `l Jtk ,(t r / Jlt,ir ► ,, .� 'r 1, ,tlyyl,i _rF rl E, '`I Ir J J' F k,l, y JJ 1 Il r t `J I fl' +c-, If If fl' NKT #05200 Permit No ,S-L(% 8 D S 1 eo _ State of North Carolina (to be provided by DWQ) Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWO Sto_rmwater 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 Bur aw Elementary School Addition Contact Person J Phillip Norris, P E Phone Number For protects with multiple basins, specify which basin this worksheet applies to (910) 343-9653 NIA elevations Basin Bottom Elevation 26 00 ft (floor of the basin) Permanent Pool Elevation 30 00 ft (elevation of the orifices) Temporary Pool Elevation 30 60 ft (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 17,408 sq ft (water surface area at the orifice elevation) Drainage Area 4 317 ac (on -site and off -site drainage to the basin) Impervious Area 2 584 ac (on -site and off -site drainage to the basin) volumes Permanent Pool Volume 36,985 cu ft (combined volume of main basin andforebay) Temporary Pool Volume 11,461 cu ft (volume detained above the permanent pool) Forebay Volume 8,674 cu ft (approximately 20% of total volume) Other parameters SA/DA' 0 070 (surface area to drainage area ratto from DWQ table) Diameter of Orifice 20 in (2 to 5 day temporary pool draw -down required) Design Rainfall 10 in Design TSS Removal 2 90 % (minimum 85% required) RECEIVED NOV o 3 2005 Form SWU-102 Version 3 99 Page 1 of 4 LB)�- W 0U3 „ , ' ' ! I � 1 „ ! , i r ! ,� y � I ; I I 11 � I J C I f Ir I f` I' ;1 i I ' ` � ,' I ,fk, ia1 r r � t�l�d � ��f , 1 I' I t f 1 S � 1 1 r 1 , ), I Ir l i I I I i , 1 I ' j I I r t I I 1 I r I , ! J_. i r �, f I ♦ 1 1 .1 'i I i r 1 ie / r # � � � � a i 1 1 � � • IY1 I rl r } I I' 1 � � y I r I I i I I I I r 1 { {! r � 1 I ' I S ! I I ,, { I 1 1 I ! I ! I L I Iif I I 1 � < Ala � 1 � k� 1 � ' I ' i � k L 1 4k { �� 1 I k i is $ I Jr �� !1 , 11 l ' III'! i 5 II o S 1 , I!'I t 1 I 1 I 1 I JII 311r !1 � fl I I , � k I 1 I � I � 1 � � I n f ' 1 4 1 n I � ! I r t _i Footnotes 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 iriterpalation 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 90% TSS removal The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal n. 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. 5 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 f The basin length to width ratio is greater than 3 1 g The basin side slopes above the permanent pool are no steeper than 3 1 h A submerged and vegetated perimeter shelf with a slope of 6 1 or less (show detail) I Vegetative cover above the permanent pool elevation is specified 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 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 ec anism 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) ❑ does This system (check one) ❑ does Form SWU-102 Version 3 99 ® does not incorporate a vegetated filter at the outlet. ® does not incorporate pretreatment other than a forebay. Page 2 of 4 iri r r - r � i Jf 1 u 1, 11, 1 15r i r if 1/.1 t .1 i11 rx i`r ` y — qCl r L , }aJ'a I I _ rri'!i-4 Maintenance activities shall be performed as follows After every significant runoff producing rainfall event and at least monthly a Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition b Check and clear the orifice of any obstructions such that drawdown of temporary pool occurs within 2 to 5 days as designed 2 Repair eroded areas immediately, 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 a 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 30 When the permanent pool depth reads 30 feet in the main pond, the sediment shall be removed feet in the forebay, the sediment shall be removed BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 30 00 Sediment Re oval El 27 00 75° --------------- --- Sediment Removal Elevation 27 00 75% Bottum EI vation 2600 5%------------ ------------------- ------ ----- Bottom Elevation 26 00 25%/ 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 RECEIV]F;I] NOV 0 3 2005 Form SWU-102 Version 3 99 Page 3 of 4 BY.S C j 0 00'400) I,` i I, 111 C If I s Ir Ir, {il 1 �, `i II 11' Uff I I + I 1 11} 11, 1'r+ +t r ! ! + 111' I r-1,111-r' rs}r l 11 = {f U 1, I ' 1 Ji "I ' le fI1 I I, !1 (!'11" ! i `r I+, I I' Irr rl,II ,1 , L06 f 10, y,r 1� i f - r 135t a �I 115r P Ilir f 11, I1P +II t3 rf 11 II .j l # 'lJ ,fir 1 r; I , I', , I it tl' It F I I I 'J I I r I, ` 'Jr rf ) (4 , rr I r 1 r•r - r' II , I , I.,- 11'r I 'if I IjIl I " I e , Jr 1 f'If I I i 1 11 tiJ el l' P ,1, r I. " i FIiJ t);I r t } Jtr , r , I I ( r� IP Ilri�, r Iri , it llr ' t I11I11 f 1 r tall i t r. 1 r e ' i�, fF', i• s" I,1 I1 r�, i 1 I flrl i' I r r I I Ille i I ' I 1 ', 1r of iI , + 1'}3,r Ill 'r II ','j"I '1 ] ' t / I I i I fI Ili, �! r I '1 ' fill f I' }r ,C't IiI If.I `, t r it !f , I IJt'r Ill rl 41 lI` fit ( Ir I# } E ,y��f! Ill, I,• ' SSF i II 1' I, , i 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 1 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 Ted Kaniuka Title Superintendent Address 925 Penderlea Highway Bur aw, NC 28425 Phone Signature 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 1, W , a Notary Public for the State of �1 o i4k ca rc 11,ka.- County of FzVJe✓ , do hereby certify that —T kQ o A o r2 J �anl Lkk, Personally appeared before me this 315iL day of S�e�f , 76 o S , and acknowledge the due Execution of the foregoing wet detention basin maintenance requirements Witness my hand and official seal ,w OFFICIAL SEAL Notary Public North Carolina; PENDER COUNTY ELIZABETH W GARDNER My Commission Expires 1/3M9 ..r�..rr.►-.�-.w ..r+.r-..++..w+.►+. 4--- SEAL Signature q �� q i C-�9W C) My commission expires l 4 Form SWU-102 Version 3 99 Page 4 of 4 � I F fl.[I'F rl {�I r � t� li , 3, ! I� I •1+ r it ,ell rlr J /' ' 1 F1 fit JI_ i f 1, 4 1 ,tif If, f I ,,, it t 1, t I -i Burgaw Elementary School Addition Stormwater Permit No SW8 051005 Pender County Designer's Certification State Stormwater Management Systems Permit No SW8 051005 NKT #05200 f(LC 1,,I_ Phll13p Norris,,_P.E. , as a duly registered Engineer _ in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the protect, Burgaw Elementary School Addition (Project) for Pender county schools (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 Signati. Registration Number NC 11966 Date 10-27-06 cc: Ted Kaniuka / Pender County Schools Roger Leeson, AZA / LS3P/Roney JPN/asn 05200 10-27-06-s--sw-cert. SEAL OCT 2 7 2006 �v Page 6 of 7 r State Stormwater Management Systems Permit No SW8 051005 Certification Requirements 1 The drainage area to the system contains approximately the permitted acreage The drainage area to the system Contains no more than the permitted amount of built -upon area All the built -upon area associated with the project is graded such that the runoff drains to the system '_All roof drains are located such that the runoff is directed into the system _�]The outlet/bypass structure elevations are per the approved plan The outlet structure is located per the approved plans Trash rack is provided on the outlet/bypass structure All slopes are grassed with permanent vegetation Vegetated slopes are no steeper than 3 1 1 The inlets are located per the approved plans and do not cause short- circuiting of the system The permitted amounts of surface area and/or volume have been �' provided �T2 Required drawdown devices are correctly sized per the approved plans 13 All required design depths are provided �4A]l required parts of the system are provided, such as a vegetated shelf, wand a forebay /f5 The required system dimensions are provided per the approved plans cc NCDENR-DWQ Regional Office Warren Holt, Pender County Building Inspections Page 7 of 7 J Phillip Norris, P E cNORRIS, KUSKE & TUNSTALL John S Tunstall, P E John A Kuske, III, P E Kent P Harrell, P E James T Pyrtle, P E CONSULTING ENGINEERS, INC. Philip Bevilacqua, P E J A Kuske, P E 902 Market Street * Wilmington, NC 284014733 • Phone (910) 343-9653 • Fax (910) 343-9604 E-Mail ofioe@nkteng oom LETTER OF TRANSMITTAL To Linda Lewis Date October 27, 2006 Job No 05200 NC DENR subject Burgaw Elementary School Addition Pender County, NC WE ARE SENDING YOU VIA HAND DELIVER ® ATTACHED ❑ UNDER SEPARATE COVER ❑ SHOP DRAWINGS ❑ PRINTS ❑ TRACINGS ❑ SPECIFICATIONS ❑ DISKS ❑ COPY OF LETTER ❑ FAX TRANSMITTAL: NUMBER OF PAGES INCLUDING THIS TRANSMITTAL Call 910-343-9653 If you have any difficulty receiving this message COPIES DATE NO DESCRIPTION 1 10-27-06 Original State Stormwater Certification (SW8 051005) 1 NOS ❑ ❑ AS REQUESTED FOR YOUR USE ❑ FOR REVIEW AND COMMENT ® FOR APPROVAL ❑ FOR BIDS DUE ❑ YOUR PRINTS LOANED TO US REMARKS cc SIGNED J Phillip Norris, P E / asn CONFIDENTIAL AND PRIVILEGED Information contained in this document is privileged and confidential, intended for the sole use of the addressee If you are not the addressee or the person responsible for delivering it to the addressee you are hereby notified that any dissemination, distribution or copying of this document is strictly prohibited If you have received this document in error please immediately notify the sender and return to the address above