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HomeMy WebLinkAboutSW8000851_CURRENT PERMIT_20020520STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW x/3(T�`J I DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD Michael F. Easley, Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Gregory J. Thorpe, Ph.D., Acting Director r Division of Water Quality Wilmington Regional Office May 20, 2002 Mr. Thomas Ravenel, Member/Manager Snow's Cut Crossing, LLC 180 Meeting Street, Suite 330 Charleston, SC 29401 Subject: Permit No. SW8 000851 Snow's Cut Crossing High Density Stormwater Project New Hanover County Dear Mr. Ravenel: The Wilmington Regional Office received final information to change the name and ownership of the Stormwater Management Permit for Snow's Cut Crossing, formerly Pleasure Island Center, on May 9, 2002. 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 000851 dated May 20, 2002, for the construction of Snow's Cut Crossing. Please replace the plan sheets DWQ-2 through DWQ-4 in the previously approved plan set with the enclosed permitted sheets, DWQ-2 through DWQ-4. This permit shall be effective from the date of issuance until June 13, 2011, (the original permit expiration date) 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 ad judicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in -the farm 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 LindaLewis, or me at (910) 395-3900. Sincerely, Rick'Shiver Water Quality Regional Supervisor RSS/arl: S:IWQSISTORMWATIPERMIT'100085I.MAY cc: John Berryman, -P.E.: Carolina Beach Building Inspections Linda Lewis Wihning n Regianal�Office; Central Files �* . NCDENR N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 (910) 395-3900 Fax (910) 350-2004 Customer Service 800-623-7748 State Stormwater Management Systems Permit No. SW8 000851 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY . STATE STORMWATER MANAGEMENT PERMIT r 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 Snow's Cut Crossing, LLC Snow's Cut Crossing New Hanover County FOR THE construction, operation and maintenance of four infiltration basins in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specificationsand 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 pennit shall be -effective from the date of issuance until June, 13, 2011 and shall be subject to the following specified conditions and limitations: J. DESIGN -STANDARDS ' ' 71. This permit -is -effective r 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.ofstormwater runoff as:described on page 3 of this permit;.theProject Data Sheet. -.The stormwater.control'has.been.designed-to'handle,the runofffrom =' a total of,683,-892!square-feet-of impervious area, in 4'infiltration basins. t 3. Approved plans and specificationsfor this-project•are'incorporated by reference and are enforceable parts . of -the permit. r 4. The tract Will'be-limited to the amount.of:built--upon:area indicated on.page .3 -of mthis permit, and per ; approved plans. -5. The built -upon area for the future development is limited to 338,026. Basins 3 and 4 have been provided for the future:runoff and must be constructed prior to any development within those drainage areas. 6. The runoff from all built=upon area within.the permitted drainage area of this project must be directed into the permitted stormwater control -system. 2 I State Stormwater Management Systems Permit No. SV79 000851 Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Name of Receiving Stream/Index #: Classification of Water Body: If Class SA, chloride sampling results Basin Number: Basin Depth, feet: Bottom Elevation, FMSL: Drainage Area, acres: Total Impervious Surfaces, ft2: Offsite Area entering Pond, ft2: Required Storage Volume, ft3: Provided -Storage Volume, ft3: Temporary Storage Elevation, FMSL: Controlling Orifice: Soil Type: Seasonal High Water Table: Expected Infiltration Rate: Time to Draw Down, days: 1IVISION OF WATER QUALITY ROJECT DESIGN DATA SHEET Y Snow's,Cut Crossing SW8 000851 New Hanover County Mr. Thomas Ravenel, Member/Manager 180 Meeting Street, Suite 330 Charleston, SC 29401 .tune 12, 2001 (modified May 9, 2002) Snow's Cut / 18-87-31.5 "SC" n/a 1 2 3 4 3.6 4 3 4 17 17 19 16 4.98 2.52 4.65 . 3.11 216,929 109,769 202,554 135,472 rerouted road -runoff via curbing, per Engineer 17.,174 8,690 16,035 10,724 17,229 8,821 27,408 12,310 20.6 21 22 20 bypass at.storage elevation pipe ' Sand 13 FMSL 8" per hour 1 3 0.4 0.6 3 State Stormwater Management Systems Peimit No. SW8 400851 II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in it's gntirety, 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 stonYnwater 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 the filter media, catch basins and piping. g. Access to the basins 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.. A portion of the proposed stormwater management facilities are located within the right-of-way of Bridge Barrier Road, The Amended Letter of Agreement between the Town of Carolina Beach and-Snow's Cut Crossing, LLC, dated April 4, 2002, must.remain in effect for the life of the development. This agreement allows the permittee-the perpetual right of use of a portion of.the right -of -way -of Bridge Barrier Road for the purpose of locating stormwater management facilities. Prior to any violation, default or nullification of the .agreement, a modification to the permit .must .be submitted which proposes other .stormwater management measures'in accordance -with the most recent version of the stormwater rules in effect, to replace those affected by the violation, default or nullification. 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 otherrsupporting 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•fa&lity 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. 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. A copy of approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from -the date of the completion of construction. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the .approved plans, prior to construction. 'If the proposed BUA for the future area exceeds the amount allowed by this permit, a modification to this permit must be submitted and approved prior to construction. In State Stormwater Management Systems Permit No. SW8 000851 11. A modification must be permitted prior to any construction. The following items will require a modification to the permit. The Director may determine that other revisions to the project should 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. C. Further subdivision, acquisition, or sale of the prof ect 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. g. An increase or decrease of the approved drainage area. h. An increase or decrease of the approved offsite drainage. 12. Prior to the sale of any portion of 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 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. 15. The permittee shall notify the Division of.any name, ownership or mailing,address changes within 30 days. 111. GENERAL CONDITIONS 1. This permit is nontransferable. 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-contdined•in :this permit may subject -. the Terniittee to enforcement. action.by.the:Division.of Water Quality,. in •accordancc with North -Carolina General'Statute 7 43.215:6A to] 43-215 :6C. 3. The issuance of.this-permit does not preclude the -P.ermittee from complying with any;and all•statutes,.rules, regulations, or ordinances which may be imposed'byother government, agencies (local,.state,.and.federal) -which have'jurisdiction: 4. Inthe event that the facilities fail to perform satisfactorily, -including the:creation of nuisance conditions, the Permittee•shalltake immediate corrective action,,including,those as may be requiredby1his Division, such as the. construction. of. additional or replacement stormwater, management systems. .5. The permittee, grants DENR Staff perrriission _to .enter the property for the purpose of inspecting all components of the permitted stormwater managemennfacility. 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. 5 State Stormwater Management Systems Permit No, SW8 000851 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. Permit issued this the 20th day of May, 2002. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Gregory J. Thorpe; rh.D., Acting Direc orb Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 000851 Snow's Cut Crossing V ■ 2 State Stormwater Management Systems Permit No. SW8 000851 Snow's Cut Crossing Stormwater Permit No. SW8 000851 New Hanover 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, ject) 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 State Stormwater Management Systems Permit No. SW8 000851 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. The outlet/by pass structure elevations are per the approved plan. _5. The out)et/bypass structure is located per the approved plans. -6. A trash rack is provided for the orifice and overflow on the outlet/bypass structure. _7. All slopes are grassed with permanent vegetation. 8. Vegetated slopes are no steeper than 3:1. .9. The inlets are located per the approved plans and do not cause short-circuiting of the system. .10. The permitted amounts of surface area and/or volume have been provided. 11. Required drawdown devices (orifices, weirs) are correctly sized and located per the approved plans. 12. All required design depths are provided. 13. All required parts of the system.are provided, such as a vegetated shelf, and a forebay. 14. The -overall dimensions of the system, as shown on the approved plans, .are ,provided. cc: NCDENR=DWQ Regional Office Tony Roberts, New Hanover County Building Inspector 11 8 �pF W A TFg4 �O �? r >_ ` ' Michael F. Easley, Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Gregory J. Thorpe, Ph.D., Acting Director Division of Water Quality Wilmington Regional Office WATER QUALITY SECTION COASTAL STORMWATER PERMIT NAME/OWNERSHIP CHANGE FORM I. CURRENT PERMIT INFORMATION: Stormwater Management Permit Number: 6wF000(95/ . _ 1. Permit Holder's name: GV OY Gf VU,D, �/1 r- 2. Signing official's name: _ r�hn L. &--rrt11n zr1 —Title- — Aa"�1�Ie� " (person legally responsible for permit) 3. Mailing address: 410 l vole F—bres/ Rcl 5le 3o4-city: E2/2�� State: Nl -Zip Code: z 7 %� Phone: 9 M 8-7(o ``72 j_ FAX 9 I9 r7c36 8 g39 (Area Code and Number) (Area Code and Number) H. NEW OWNER / PROJECT / ADDRESS INFORMATION I . This request is for: (please check all that apply) l 1/ a. Change in ownership of the property/company (Please complete Items 42; #3, and 44 below) 6,1**' b. Name change of project (Please complete.Item #5 below) C. Mailing address change. (Please complete Item 44 below) d. Other (please explain): 2. New owner's name to be put on permit: `!-:; 1,_70WS C", T CROSS110 LLC_ 3. New owner's signing official's name and title: ' = _ I erson legally responsible for permit) He',Mber-/ . (Title) 4. New Mailing address: 160 h6 -ulluc S�Inc- 330City:C State: _ Zip Code: `L9,40 I Phone: 04i -ill- (wS FAX 94 - U3 •- 66A S (Area Code and `umber) (Area Code and Number) 5. New Project Name to be placed on permit: S C j CTIOSMOG w N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 (910) 395-3900 Fax (910) 350-2004 Customer Service 800-623-7748 PERMIT NAMEIOWNERSHIP CHANGE FORM THIS APPLICATION PACKAGE WILL NOT BE ACCEPTED BY THE DIVISION OF WATER QUALITY UNLESS ALL OF THE APPLICABLE ITEMS LISTED BELOW ARE INCLUDED WITH THE SUBMITTAL. . REQUIRED ITEMS: This completed form. 2.7 Legal documentation of the transfer of ownership. 3. ` A copy of the recorded deed restrictions, if required by the permit. 4. The engineer's certification, if required by the permit. 5. A signed Operation and Maintenance plan, if a system that requires maintenance will change ownership. CERTIFICATION MUST BE COMPLETED AND SIGNED BY BOTH THE CURRENT PERMIT HOLDER AND THE NEW APPLICANT IN THE CASE OF A CHANGE OF OWNERSHIP. FOR NAME CHANGES, COMPLETE AND SIGN ONLY THE CURRENT PERMITTEE'S CERTIFICATION. Current Permittee's Certification: I, , attest that this application for a name/ownership change has been reviewed and > accurate d com lete to the best of my knowledge. I understand that if all required parts of this applicatiion are not co e and th t if all required supporting information and attachments are not included, this application packa ill be cturn mplete. Signature- Date: /U •.46 ' D I N cant s�Certification: (Must be completed for all transfers of ownership) TaJo , attest that this application for an ownership change has been reviewed xi w and is accurate and complete to the best of my knowledge. I understand that if all required parts of this application are not completed and that if all r5qqed supporting information and attachments are not included, this application package will be returned ash ete/.-] , Signature: Date:.,. 2. / 01 0-2 THE COMPLETED APPLICATION PACKAGE, INCLUDING ALL SUPPORTING INFORMATION AND MATERIALS, SHOULD BE SENT TO THE FOLLOWING ADDRESS:, North Carolina Department of Environment and Natural Resources Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 ATTN: Linda Levis Permit No. SLIJ?owg=4:i (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name: _:!!St'10W �5 C[.,c. F o .s S � 1� Contact Person: �� SLh4� Phone Number: (� �) ��3^ Le�(]5 Iz ac S This work -sheet applies to: Basin No. 3 in Drainage Area (as identified on plans) (from Form SWU-101) IL DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon an actual field investigation and soil ,borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Infiltration Rate SHWT Elevation Basin Design Parameters Design Storm Design Volume Drawdown Time Basin Dimensions Basin Size Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation h 6 61 3por ef/hr/sf (circle appropriate units) fmsl (Seasonal High Water Table elevation) 4 1 inch (1.5 inch event for SA -waters, I inch event far others) /(a o,3 c.f. D,'3 days 4-U-7 ft. x / 1 ft. = ¢4 -7 d sq. ft. (bottom dimensions) 2-7, 3 o4-c.f. ref. D fmsl ZZ.O fmsl Z 3.y fmsl Form SWU-103 Rev 3.99 Page i of 3 III. 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 that 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. Attach justification if'a requirement has not been met. Applicants (Initials r� a. System is located 50 feet from class SA waters and 30 feet from other surface waters. System is located at least 100 feet from water supply wells. Bottom of system is at least 2 feet above the seasonal high water table. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. System is not sited on or in fill material or DWQ approval has been obtained. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. Drainage area for the device is less than 5 acres. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. in. .Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. n. 'Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). o. Flow distribution mechanism within the basin is provided. p. A benchmark is provided to determine the sediment accumulation in the pretreatment device. q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). r. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five clays. A soils report and all pertinent draw -down calculations are attached. Plans ensure that the instailed system will meet designsP specifications (constructed or Y b restored) upon initial operation once the project is complete and the entire drainage area is stabilized. Form SWU-103 Rev 3.99 Page 2 of 3 IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads I feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. Ifthe Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I.acknowledge and agree by my signature below that I am responsible for the performance of the -five 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 and Title: Address:[ 60 M Phone: 33� a.S 'S Zoz4vl Date: ' D'Z Signature: / Note: The legally responsible party . hould 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, Q)-ON C4- �.Notary Public for e-,) ho- r day of F- 0 Y(JU requirements. Witness SEAL do hereby certify that i,[, M, and ackl and official of � t� �f `County of 1)&�— personally appeared before me this lwledc th ue execution otthe forgoing infiltration basin maintenance I My commission expires "1 r l s- r Form SWt3-103 Rev 3.99 Page 3 of 3 n Permit No. 50J? 000 3 S (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This farm may be photocopied for use as an anginal DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. L PROJECT INFORMATION Project Name : w"5 5 151 n Contact Person: Ta.W SC11CL Phone Number: f 3�_ b(P05 This worksheet applies to: Basin No. 2 in Drainage Area (as ident fed on plans) (from Form SWU-101) II. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Infiltration Rate SHWT Elevation Basin Design Parameters Design Storm Design Volume Drawdown Time Basin Dimensions Basin Size Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation �vre,h 8 &irr Cf/hr/Sf (circle appropriate. units) 13_ fmsl (Seasonal High Water Table elevation) I inch (1.5 inch event for SA waters, 1 inch event for others) c.f. 2 days ¢d ft. x 0,821 c.f. /7 0 fmsl Z 1.O fmsl Z 2.y fmsl /' 5 ft. = 209 sq. ft. (bottom dimensions) Form SWU-103 Rev 3.99 �\ Pa-e l of 3 III. REQUIRED ITEIIIS 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: I5 A NCAC 2H .1008. Initial in the space provided to indicate that 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. Attach justification if a'requirement has not been.met. Applicants itials k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. in. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. n. a. System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. System is not sited on or in fill material or DWQ approval has been obtained. £ System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. g. Drainage area for the device is less than 5 acres. h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). Flow distribution mechanism within the basin is provided. A benchmark is provided to determine the sediment accumulation in the pretreatment device. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). System is designed to draw down the design storage volume -to the proposed bottom elevation under seasonal high water conditions within five days: -A soils report and all pertinent draw -down calculations are attached. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. Form 5WU403 Rev 3.99 Pale 2 of 3 t.P'.. 'lam INFILTRATION BASIN OPERATION AND MAINTENANCE AGREENIEN r I . After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stor3nwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads � ._� feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. If the Division determines that the system is failing, the system will immediately be rep aired.to original design specifications. If the system cannot be repaired to perform its design function, other s ormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for the performance of the five 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. I Print Name and Title: I Address: b O -Q�Q - } S S e Z_k 4ol Phone: Al 1a.3 �� Date: - �—-- Signature: Note: The legally responsible parr sho d At 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. `cam, �A � C� F " 6 I � r`� N Public for the State of `k��-`-''� � i ��County of .�►t L'� 1 v Y� , do hereby certify that Jv�ersonally appeared before me this st day of 7A5b Yand ackno edge th du execution of e forgoing infiltration basin maintenance requirements. Witness my hand and official seal, f ( _ . At .� - SEAT, � My commission expires Octro I Form SWU-103 Rev 3.99 Page 3 of 3 Permit No. SGu73oxy (to he provided by DWQ1) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DM Stormwater Management Plan _Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for'each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name : Contact Person �JnoLi-n Cud- 0-0ss I LLG I r Phone Number: ( qq3) q a3_ - 6, 4125, IS This worksheet applies to: Basin No. 4 in Drainage Area (as idennified on plans) (from Form SWU-101) H. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations'shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Infiltration Rate SHWT Elevation Basin Design Parameters Design Storm Design Volume Drawdown Time Basin Dimensions Basin Size Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation Fonn SWU-103 Rev 3.99 S in/h or cf/hr/sf (circle appropriate units) 13 fmsl (Seasonal High Water Table elevation) Iinch (1.5 inch event for SA waters, I inch event for others) to 4- c.f. 0._6P _ days ft. x _ ft. = 13& r sq. ft. (bottom dimensions) 1Z� 3./0 c.f. L D fmsl Zo. fmsl 2 �•y fmsl Pace 1 of 3 r" III. 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 that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an,agent in the Stormwater Management Perrnit Application Form, the agent may initial below. Attach justification if'a requirement has not been met. Applica I 'tials a. b. C. d. e. f. g. h. i. System is located 50 feet from class SA waters and 30 feet from other surface waters. System is located at least 100 feet from water supply wells. Bottom of system is at least 2 feet above the seasonal high water table. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. System is not sited on or in fill material or DWQ approval has been obtained. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. Drainage area for the device is less than 5 acres. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). Flow distribution mechanism within the basin is provided. A benchmark is provided to determine the sediment accumulation in the pretreatment device. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. A soils report and all pertinent draw -down calculations are attached. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. Form SWU-103 Rev 3.99 Pace 2 of 3 IN'. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a storinwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads I feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. if the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for the performance of the five maintenance procedures listed above. I agree to notify DWQ of any problems with the,system or prior to any changes to the syste r responsible party. Print Name and Title: f*ja-'� J clk_ -' Address:`D{{U Ylc -��iJ 1�� LC,) fin. SG 'LGL4'i-)1 Phone: Date: 2 i OZ Signature: Note: The legally, responsible pam, should not be a homeowners association unless more than 5067r, of the lots have been sold and a resident of the subdivision has been named the president. I pp�� 1�� �*✓'� Ct �J rna-ri- , a�,ary PubEic for the �State , of 'bounty of uL.,m �a Vy do hereby certify that S 4 ' A personally appeared before me this day of Land acknow die the ue lion of th rgoinb infiltration basin maintenance requirements. Witness my and and offtcial seal, It \lf� e t d A , SEAT. My commission expires Form SWU-103 Rev 3.99 Paoe 3 of 3 \, Permit No. 09 000 FS/ (to be provided bY DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. L PROJECT INFORMATION Project Name: Contact Person: OW ,� S C11 This worksheet applies to: Basin No S4 Pholie Number: (0 � 3� 9-1 (as idenrtfeed on plans) o J uv )5 in Drainage Area (from Form SWU-101) II. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fms]). Soils Report Summary Soil Type Vlre� Infiltration Rate S in/hr or cf/hr/sf (circle appropriate units) SHWT Elevation 13 fmsl (Seasonal High Water Table elevation) Basin Design Parameters Design Storm 1 inch (1-5 inch event_for SA waters, 1 inch event for others) Design Volume 0 c.f. Drawdown Time days Basin Dimensions Basin Size Z&O ft. x ft. _ 13 Co'5 sq. ft. (bottom dimensions) Basin Volume Provided U7 ZZ9 c.f. Basin Elevations Bottom Elevation Storage Elevation Top Elevation 7 D fmsl ZD. (0 _ fmsl 2 Z.y fmsl Form SWU-103 Rev 3.99 Paae 1 of 3 III. 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 that 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. Attach justification if a iregirirernent has not been met. Applicants initials a. System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. d. S Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. System is not sited on or in fill material or DWQ approval has been obtained. System is Iocated in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. �g. Drainage area for the.device is less than 5 acres. h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is i. attached. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event • for areas draining to SA waters ). Design volume and infiltration calculations attached. i j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. -.`�&k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or m. sediment trap is provided. Bottom of the device is covered with z layer of clean sand to an average depth of 4 inches n. or dense vegetative cover is provided. Vegetated filter is provided for overflow arid detail is shown on plans (Required minimum 'L length is 50 feet for SA waters, 30 feet for other waters). o. Flow distribution mechanism within the basin is provided. A benchmark is provided to determine the sediment accumulation in the pretreatment device. q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). r. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. A soils report and all 1/1Ls. pertinent draw -down calculations are attached. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the -project is complete and the entire drainage area is stabilized. Form SWU-103 Rev 3.99 Noe 2 of 3 I 1� INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT E After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a storiwater treatment device or stream, etc.. A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads l feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. If the Division determines that the. system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H A000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for the performance of the five 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 and Title:�C rut"'' vJ �Q Vx'( '—"o Address: i � 0 *n bL� )b C z914191 > -1), 3'. LF(VC : "1.10°2 Note: The legally responsible`party should of 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. Ia Notary Public for the St to of�l'ounty of (1 , do hereby certify that S \sf" ""'� personally appeared before me thisT�� day of ac owled a th ue executio f the forgoing infiltration basin maintenance requirements. Witness my hand and official cal, OC SEAL My commission expires Form SWU-103 Rev 3.99 Page 3 of 3 t �TIZP_TIT-- Ray 11. Rothrock Mayor Pat rfird Council woman Joel Macon Councilman TOWN OF CAROLINA BEACH 1121 N. Lake Park Boulevard Carolina Beach, North Carolina 28428 910 458 2978 / FAX 910 458 2997 LETTER OF AGREEMENT AMENDED Agreement of Perpetual Right of Use Eastern Portion of Bridge Barrier Road Right -of -Way Town of Carolina Beach Carolina Beach, North Carolina Dennis Barbour Mayor Pro Tem Gary Doctsch Councilman Calvin R. Peck, Jr. Toivn Manager This agreement established on the 4 th day of April 2002, between the Town of Carolina Beach, NC, first party, and Snow's Cut Crossing, LLC (development corporation), second party. Purpose: The first party hereby authorizes the second party perpetual use of the eastern portion of Bridge Barrier Road right-of-way (a municipal owned 100 ft. road right-of-way) from a point east of the existing paved asphalt surface to the road right-of-way line (approximately 39 feet in width) and paralleling the development project site of the second party (approximately 1,378.38 feet in length) for the purpose of constructing retention/detention storm water areas, drainage, utilities, sidewalks, driveways, landscaping, and other authorized improvements as required by the first party. Conditions ofAgreement: The second party, as conditions of the perpetual right of use of the road right -or -way, hereby agrees to accept responsibility to repair, replace, or correct any and all damages which may occur to the existing asphalt surface, municipal water and/or sewer lines, hydrants and/or any elements associated thereto as a result of actions of the second party or subdivisions thereto. The second party also accepts perpetual responsibility for repair, replacement, correction, and maintenance of all improvements constructed and/or installed within the authorized area of agreement to include, but not limited to, water and sewer lines/services, retention/detention areas, drainage, sidewalks, driveways, landscaping, and elements associated thereto. In agreement with the purposes and conditions as specified herein, both parties hereby agree and affix their authorized signatures and corporation seals as applicable, and, notarized and witnessed accordingly to certify a perpetual binding agreement. Should the second party fail or default in violation of this agreement, the party of the first part shall have the right to proclaim this agreement null and void and shall take appropriate actions as necessary to insure compliance of the second party. Party of the First Part A /0 tv Mayor, To f Carolina Beach, North Caro i tLz&;tL- Authorized Corporation Agent (SEAL) Notary Public April 4- 2002 Date April. 4, 2002 Date .- —>L�li►�1I1Y� r North Carolina Department of Environment and Natural Resources Division of Water Quality Wilmington Regional Office Michael F. Easley, Governor William G. Ross, lr., Secretary .tune 13, 2001 Mr. John L. Berryman Wolfe Groupe, Inc. 4109 Wake Forest Road, Suite 304 Raleigh, NC 27609 Subject: Permit No. SW8 000851 Pleasure Island Center High Density Stormwater Project New Hanover County Dear Mr. Berryman: The Wilmington Regional Office received a complete Stormwater Management Permit Application for Pleasure Island Center on .tune 12, 2001. 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 211.1000. We are forwarding Permit No. SW8 000851 dated June 13, 2001, for the construction of Pleasure Island Center. This permit shall be effective from the date of issuance until June 13, 2011, 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 ad judicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at (910) 395-3900. Sincerely, Rick Shiver Water Quality Regional Supervisor RSS/arl: S:IWQSISTORMWATIPERMIT100085I.JUN cc: John Tucker, P.E. Carolina Beach Building Inspections Linda Lewis Wilmington Regional Office Central riles 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 Storrnwater Management Svstcros Permit No. SW8 0008>] 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 ofArticle 21 of Chapter 143, General Statutes ofNorth Carolina as amended. and other applicable Laws. Rules, and Regulations PERMISSION IS HEREBY GRANTED TO ,John L. Berryman, Owner Pleasure Island Center New Hanover County FOR THE construction, operation and maintenance of four infiltration basins in compliance with the provisions of 1 5A 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 .tune 13, 2011 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from a total of 683,892 square feet of impervious area, in 4 infiltration basins. 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. The built -upon area for the future development is limited to 338,026. Basins 3 and 4 have been provided for the future runoff and must be constructed prior to any deveiopment within those drainage areas. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. State Stormwater Management Systems Permit No. SW8 000851 Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Name of Receiving Stream/Index #: Classification of Water Body: If Class SA, chloride sampling resul Basin Number: Basin Depth, feet: Bottom Elevation, FMSL: Drainage Area, acres: Total Impervious Surfaces, ft': Offsite Area -entering Pond, ft2: Required Storage Volume, ft3: Provided Storage Volume, ft': Temporary Storage Elevation, FMS Controlling Orifice: Soil Type: Seasonal High Water Table: Expected Infiltration Rate: Time to Draw Down, days: DIVISION OF WATER QUALITY PROJECT DESIGN DATA SHEET Pleasure Island Center SW8 000851 New Hanover County Mr. John L. Berryman 4109 Wake Forest Road, Suite 304 Raleigh. NC 27609 June 12, 2001 Snow's Cut / 18-87-31.5 rtSC,l ts: n/a 1 2 3 4 3.6 4 3 4 17 17 19 16 4.98 2.52 4.65 3.11 - 216,929 109,769 202,554 135,472 rerouted road runoff via curbing, per Engineer 17,174 8,690 16.035 10,724 17.229 8,821 27,409 12,310 L: 20.6 21 22 20 bypass at storage elevation pipe Sand '13 FMSL 8" per hour 1 3 0.4 0.6 9 State Stonnwatcr Management Systems Permit No. SIA78 000851 11. SCHEDULE OF COMPLIANCE The stormwater manaocnient system shall be constructed in it's 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 wiII be repaired immediately. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in'accordance with approved plans and specifications. f. Debris removal and unclogging of the filter media, catch basins and piping. g Access to the basins must be available at all times. 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. A portion of the proposed stormwater management facilities are located within the right-of-way of Bridge Barrier Road. The Letter of Agreement between the Town of Carolina Beach and Coastal Carolina, LLC, dated November 3, 2000, must remain in effect for the life of the development. This agreement allows the permittee the perpetual right of use of a portion of the right-of-way of Bridge Barrier Road for the purpose of locating stormwater management facilities. Prior to any violation, default or nullification of the agreement, a modification to the permit must be submitted which proposes other stormwater management measures in accordance with the most recent version of the stormwater rules in effect, to replace those affected by the violation, default or nullification. J 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 tfie 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. 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. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. 10. The permittce shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. if the proposed BUA for the future area exceeds the amount allowed by this permit, a modification to this permit must be submitted and approved prior to construction. 4 State Stormwater Management Systems Permit No. SW8 000851 1. A modification must be permitted prior to any construction. The following items will require a modification to the permit. The Director may determine that other revisions to the project should 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. C. Further subdivision, acquisition, or sale 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. g. An increase or decrease of the approved drainage area. h. An increase or decrease of the approved offsite drainage. 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 permittee when the permitted site does not meet one or more of the minimum requirements ofthe 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. 15. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. I11. GENERAL CONDITIONS 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 Permittec, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 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 Permittee shall take immediate corrective action, including those is may be required by this Division, such as the construction of additional or replacement stormwater management systems. 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 an), permit condition. E State Stormwater Management Systems o Permit N. SW£ 000851 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. Permit issued this the 13th day of .tune, 2001. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Kerr T. Stevens, Director 1- iW-1 Division of Water Quality By Authority of the Environmental Management Commission Permit plumber SW8 0008-51 no State Stormwater Management Systems Permit No. SNV9 000851 Pleasure Island Center Stormwater Permit No. SWS 000851 New Hanover 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, ect) 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 7 State Stormwater Management Systems Permit No, SWS 000851 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. The outlet/bypass structure elevations are per the approved plan. 5. The outlet/bypass structure is located per the approved plans. 6. A trash rack is provided for the orifice and overflow on the outlet/bypass structure. 7. AlI slopes are grassed with permanent vegetation. S. Vegetated slopes are no steeper than 3:1. 9. The inlets are located per the approved plans and do not cause short-circuiting of the system. 10. The permitted amounts of surface area and/or volume have been provided. ] I . Required drawdown devices (orifices, weirs) are correctly sized and located per the approved plans. 12. All required design depths are provided. 13. All required parts of the system are provided; such as a vegetated shelf and a forebay. 14. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DWQ Regional Office Tony Roberts, New Hanover County Building Inspector I ft VSR . t - E S' ...� a,.+.. t t',�#R -�', t G.,, .4'r �i� _ F 7 i1\ a .77 Date Received Fee Paid Permit Number 3- 2-01 6-40-0-5qZ 78 1 5'(07 aCY-)gs State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): John L. Berryman 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): John L. Ber rman 3. Mailing Address for person listed in item 2 above: ' 4109 Wake Forest Road, Suite 304 City: Raleigh State: NC Zip. 27609 Telephone Number: ( 919 876.9217T 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Pleasure Island Center 5. Location of Project (street address): Carolina Beach Road City: Carolina Beach County: New Hanover 6. Directions to project (from nearest major intersection): .1 .-.:il_s s-ut'-. -f t" US 421 b,idg- -vz S:--w's Cut - t'-.z w..st sid_ =f US 421 7. Latitude: 34 03 08 Longitude: 77 54 02 of project 8. Contact person who can answer questions about the project: Name: John Tucker Telephone Number: ( 919 ) 567,0483 H. PERMIT INFORMATION: 1. 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 submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 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 x NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. 111. 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 collected via HDPE pipe and directed to four infiltration basins. 2. Stormwater runoff from this project drains to the Cape Fear River basin. 3. Total Project Area: 15.7 acres 4. Project Built Upon Area: 100% % S. How many drainage areas does the project have? 4 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 1 Basin 2 p.:erwkw ...', r' - Y.•qa.-. :,.. ` . .. k,. .-.- a.. .x•.m. ar. r,.ay.,u.MW Receiving Stream Name Snow's Cut Snow's Cut Receiving Stream Class SC SC Drainage Area 4.98 AC 2.52AC Existin Im ervious" Area 0 0 Proposed Im rvious*Area 4.98 AC 2.52 AC Impervious* Area (total) 100% 100% ,. ' y ', mow., - On -site Buildings 56,675 SF 14,400 SF On -site Streets On -site Parking 36 SF�— On-site Sidewalks 5763 SF 1830 SF Other on -site Woofln iX ov - l g°i. 2 SF - Off -site Total: ?IS Total: F 10 ry, 7t Z 5F Impervious area is defined as the built upon area including, but noA limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SNW-101 Version 3.99 Page 2 of 4 kcA--, 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 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/Fsosion Control 404/401 Permit x NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project . Stormwater will be collected via »DPE pipe and directed to four infiltration basins. 2. Stormwater runoff from this project drains to the _ Cape Fear _ _ River basin. 3. Total Project Area: 15.7 acres 4. Project Built Upon Area: 100% % 5. How many drainage areas does the project have? 4 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 3 Basin 4 ^..Pd W i W A •.. a`.vk r .b:.'' ..4 .J Ta..3.e ,fry, if- Receiving Stream Name Snow's Cut Snow's Cut Receiving Stream Class SC SC Drainage Area 4.65 AC 3.11 AC Im ervious* Area o 0 -Existing Ipn ervious'Area 4.65 AC 3.11 AC -Proposed Impervious* Area (total) 100% (Assumed) 100% (Assumed) On -site Buildings To Be Determined (Future Development) To Be Determined (Future Development) On -site Streets To Be Determined Future Development) To Be Determined (Future Deveiopment) On -site Parking To Be Determined (Future Deveiopment) To Be Determined (Future Development) On -site Sidewalks To Be Determined (Future Development) To Be Determined Future Development) Other on -Site To Be Determined (Future Development) To Be Determined (Future Development) Off -site To Be Determined (Future Development) To Be Determined (Future Development) Total: 4.65 AC (Potential) Total: 3.11 AC (Potential) Impervious area is defined as the built upon area including, but not limited to, buildings; roads, parking areas, sidewalks, gravel areas, etc. Form SWTJ-101 Version 3.99 Page 2 of 4 0 r 7. How was the off -site impervious area listed above derived? NA 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 stormwa ter management permit number 5 W 3 00085 j as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. 2. No more than square feet of 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. All permitted runoff from outparceis or future development shall be directed into the permitted stormwater control system. 77wse 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 Storrnwater 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 Forst 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. 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 $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 & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may.provide information on your behalf, please complete this section. Designated agent (individual or firm): John A.K. Tucker, P.E. Mailing Address: PO Box 297 City: Fuquay-Varina _ State: NC Zip: 27526 Phone: ( 919 ] 567.0483 Fax:.( 919 ] _5f7.3$11 _ VIIL APPLICANT'S CERTIFICATION I, (print or type name of person Iisted in General Information, item 2) John L, Berryman 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 ve&tsy�'ill be r orded, and that the proposed project complies with the requirements of 15A NCAC 2H .14 l % Signature:. Form SWU-101 Version 3.99 Page 4 of 4 Date: _ .3 1, V Y Permit No. ,) ocx) FS ! (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQStormwater Managgment Plan Review: i . A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION Project Name : Pleasure Island Center Contact Person: John Tucker Phone Number: 919 567.0483 This worksheet applies to: Basin No. 1 in Drainage Area 4.98 (ai tdenoed on plans) (from Form SWU-1 b1) H. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Kureb Sand Infiltration Rate 8 in/hr or cf/hr/sf (circle appropriate units) SHWT Elevation 13 fmSl (Seasonal High Water Table elevation) Basin Design Parameters Design Storm inch (1.5 inch event for SA waters, I inch event for others) Design Volume J 7117q ate— c.f. Drawdown Time .82 days Basin Dimensions Basin Size 260 ft. x 5 ft. = 4-3eo sq. ft. (bottom dimensions) Basin Volume Provided -ZD-. -1 W�Lct Basin Elevations Bottom Elevation 17.00 fmsl Storage Elevation 20.60. fmsl Top Elevation 22.00 fmsl Form SW-103 Rev 3.99 Page 1 of 3 M. REQUIRED ITEMS OWCKLIST 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 that 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. Attach justification if a requirement has not been met. Applicants Initials 'f a. System is located 50 feet from class SA waters and 30 feet from other surface waters. �T' T b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. 41- d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. System is not sited on or in fill material or DWQ approval has been obtained. f. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. g. Drainage area for the device is less than 5 acres. h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). o. Flow distribution mechanism within the basin is provided. p. A benchmark is provided to determine the sediment accumulation in the pretreatment device. q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). r. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. A soils report and all pertinent draw -down calculations are attached. s. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. Form SWU-lb3 Rev 3.99 Page 2 of 3 IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove -any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin. 5. If the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for the performance of the five 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 and Title: _John L. 13errymarl Address: 4109 Wake Forest Road Suite 304, Raleiqh, NC Phone:_ 919.876417 /) Date: Signature: /""" Note: The a ly responsible party should not�be a homeowners association unless more than 50% of the lots have been sold and (n� a resident of tthe subbddiviisio�n has been named the president. I, Y �L..� /-Lt,Q.Q a Notary Public for die State of aunty of /A 1,41,/-C , do hereby certify that personally appeared before me this vk ` �001 an dayuf �JI,�L„ , �L, d acknowledge the due execution 9f the forgoing infiltration basin maintenance !eauircinents. Witness my hand and official seal, SEAL , My commission expires 1a�3A'S • L Form SWU-103 Rev 3.99 Page 3 of 3 Permit No. (A) � bU) S-S I (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied far use as an original DWQ StormwaWri A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. L PROJEC17INFORMATION Project Name : Pleasure island Center Contact Person: John Tucker Phone Number: ( 919 ') 567.0483 This worksheet applies to: Basin No. 2 (as Wentjjied on plant) in Drainage Area 2.52 AC (from Form SWU-101) H. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon.an actual held investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fcnsl). Soils Report Summary Soil Type Infiltration Rate SHWT Elevation Basin Design Parameters Design Storm Design Volume Drawdown Time Basin Dimensions Basin Size Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation Form 5WU-103 Rev 3.99 Kureb Sand 8 in/hr or cf/hr/sf (circle appropriate units) 13 fmsl (Seasonal High Water Table elevation) 1 inch (1.5 inch event far SA waters, I inch event for others) B ,0 c.f. Ir, A ? 2.59 days 140 ft. X 1.5 ft. = --2-* ZO9 Sq. ft. (bottom dimensions) SZLc.f. . G 17.00 fmsl 21.00 finsl 22,00 fmsl Page 1 of 3 111. 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 that 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. Attach justification if a requirement has not been met. Applicants Initials a. System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. System is not sited on or in fill material or DWQ approval has been obtained. f. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. g. Drainage area for the device is less than 5 acres. h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. :A!-- j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system," including any off -site drainage. Calculations attached. k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). o. Flow distribution mechanism within the basin is provided. p. A benchmark is provided to determine the sediment accumulation in the pretreatment device. 4r q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). r. System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. A soils report and all pertinent draw -down calculations are attached. s. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. Form 5WU-ta3 Rev 3.99 Page 2 of 3 IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT I. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow strictures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or strearn, etc.), A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the Infiltration basin. 5. If the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. 1 acknowledge and agree by my signature below that I am responsible for the performance of the five 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 and Title: John L. Berryman M WoM J3 Address: 4109 Wake F 919,876121711 /J /Y Date: To r ' 40 Note: ThVolly responsible party should no�e 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 a otary Public for the state of ounty of 1�)4k8. , do hereby certify that fJ11a AL personalty appeared before me this J day of, boor, and acknowledge the due execution of the forgoing infiltration basin maintenance regTuements."Witness my hand and official seal, SEAL My commission expires_ Form SWU-103 Rev 3.99 Page 3 of 3 t , Jr � _ ... ,, .. ' -/� " _, �r r}. Permit No. :S W� ow? - f (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATIONBASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Stolmwater. . . A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. I. PROJECT INFORMATION , Project Nam: Pleasure Island Center Contact Person:' John Tucker Phone Number: 919 567.0483 This worksheet applies to: Basin No. 3 in Drainage Area 4.65 AC (ai Wenf#Ud on plant)(from Form SWU-101) H. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon.an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Kureb Sand Infiltration Rate 8 in/hr or cf/hr/sf (circle appropriate units) SHWT Elevation 13 fmsl (Seasonal High Water Table elevation) Basin Design Parameters Design Storm 1 inch (1.5 inch event for SA, waters, I inch event for others) Design Volume LI D3 as-sTz C.f. Drawdown Time .35 days Basin Dimensions Basin Size Basin Volume Provided Basin Elevations Bottom Elevation Storage Elevation Top Elevation 407 ft. X 11 ft. = 44707 sq. ft. (bottom dimensions) .aa., Z D c.f. 19.00 fmsl 22.00. fmsl 23.00 fmsl Page 1 of 3 Form MU-103 Rev 3.99 III. 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 that 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. Attach justification if a requirement has not been met. Applicants Initials a System is located 50 feet from class SA waters and 30 feet from other surface waters. b. System is located at least 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. System is not sited on or in fill material or DWQ approval has been obtained. f. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. k. 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. n. o. P q• It r. Drainage area for the device is less than 5 acres. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). Flow distribution mechanism within the basin is provided. A benchmark is provided to determine the sediment accumulation in the pretreatment device. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. A soils report and all pertinent draw -down calculations are attached. s. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. Farm 5WU-103 Rev 3.99 Page 2 or 3 IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT 1. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. ' 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4, Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i,e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the design depth reads feet In the pretreatment unit, the sedirent shall be removed from both the pretreatment unit and the infiltratlon basin. 5. If the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other'stormwater control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for the performance of the five 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 and Title: John L Berryman . m em j m- Address: 4109 Wake Forest Road Suite 304. Raleigh, NC Phone: 919.87 .923f A — Date: 3 • g 0� - -- — Signature: Note: Thee ally responsible parry should not be a homeowners association unless more than 50% of the lots have been sold and a reYdent of the subdivision has ben named the president. 1, a otary Public for the State of ct County of do hereby certify that L 6AAdm a Al personalty appeared before the this 'day of A (A C1 QQ0 1, and acknowledge the due execution If the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, SEAT; ; -~ My commission expires 4'3 OJ Form SWU-103 Rev 3.99 Page 3 of 3 } 4 � t 1"A r Permit No. 5W3 0xSS f (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ Storm -water Management Plan Reyiew: A complete stormwater management plan submittal includes a stormwater management permit application, an infiltration basin supplement for each system, design calculations, soils report and plans and specifications showing all stormwater conveyances and system details. L PROJECT INFORMATION Project Nam: Pleasure Island Center Contact Person: John Tucker Phone Number: ( 919 ) 567.0483 �• � l This worksheet applies to: Basin No. 4 in Drainage Area-?Snc (ar fdentilled on p1m) (from Form SWU-101) U. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be based upon an actual Meld investigation and soil borings. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Soils Report Summary Soil Type Kureb Sand Infiltration Rate $ in/hr or ef/hrlsf (circle appropriate units) SHWT Elevation 13 fmsl (Seasonal High Water Table elevation) Basta Design Parameters Design Storm 1 inch (1.5 inch event for SA waters, 1 inch event for others) Design Volume i of I c.f. . b. �(� . b, 01 Drawdown Time .57 days Basin Dimensions Basin Size 94 ft. x 17 ft. = 1367 sq. ft. (bottom dimensions) Basin Volume Provided k3859 14SVELc.f. 60-, l�-i3to (oGbt Basin Elevations Bottom Elevation 16.00 fmsl Storage Elevation 20.00 fmsl Top Elevation 21.00 fmsl Form SWU-103 Rev 3.99 Page 1 of 3 III. 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 that 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. Attach justification If a requirement has not been met. Applicants Initials a. System is located 50 feet from class SA waters and 30 feet from other surface waters. 6. System is located at Ieast 100 feet from water supply wells. c. Bottom of system is at least 2 feet above the seasonal high water table. d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon. e. System is not sited on or in fill material or DWQ approval has been obtained. f. System is located in a recorded drainage easement for the purposes of operation and maintenance and has recorded access easements to the nearest public right-of-way. g. Drainage area for the device is less than 5 acres. h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached. i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1,5 inch event for areas draining to SA waters ). Design volume and infiltration calculations attached. j. System is sized to take into account the runoff at the ultimate built -out potential from all surfaces draining to the system, including any off -site drainage. Calculations attached. k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V). Or 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or sediment trap is provided. m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or dense vegetative cover is provided. n. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum length is 50 feet for SA waters, 30 feet for other waters). o. P. q• r. s. Flow distribution mechanism within the basin is provided. A benchmark is provided to determine the sediment accumulation in the pretreatment device. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided). System is designed to draw down the design storage volume to the proposed bottom elevation under seasonal high water conditions within five days. A soils report and all pertinent draw -down calculations are attached. Plans ensure that the installed system will meet design specifications (constructed or restored) upon initial operation once the project is complete and the entire drainage area is stabilized. Form SWU-103 Rev 3.99 Page 2 of 3 W. INFELTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT I. After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion, trash accumulation, vegetative cover, and general condition. 2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow vegetated cover to maintain a maximum height of six inches, and remove trash as needed. 3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow structures for blockage and deterioration. Remove any blockage and repair the structure to approved design specifications. 4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may cause the required water table separation to be reduced and may compromise the ability of the system to perform as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water duality (i.e. stockpiling near a stormwater treatment device or stream, etc.). A benchmark shall be established in the pretreatment unit. The benchmark will document the original design depth so that accurate sediment accumulation readings can be taken. The measuring device used to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not readily penetrate into. accumulated sediments. When the design depth reads feet in the pretreatment unit, the sediment shall be removed from both the pretreatment unit and the infiltration basin, 5. If the Division determines that the system is failing, the system will immediately be repaired to original design specifications. If the system cannot be repaired to perform its design function, other stormwater control devices as allowed by NCAC 2H J 000 must be designed, approved and constructed. I acknowledge and agree by my signature below that I am responsible for the performance of the five 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 and Title: ,John L. Berryman Address: 4109 Wake Forest Road Suite_ 304 Raleigh, NC Phone: 919.876.gR17 a 49 Date: 3 • • Note: The Illy responsible parry should not is homeowners association unless more than 50°% of the lots have been sold and a resident of the subdivision, has been named rite president. b ! 1uu—L&, a r4otary Public for the State of "nry of �r A) q ki , do hereby certify that personally appeared before me this' day of C-A _Q00 L and acknowledge the due execution of the forgoing infiltration basin maintenance rc�uirements. Witness my hand and official seal, My commission expires Form SWUW; , Rev 3.99 Page 3 of 3 I DICKSON Engineers -Planners • Surveyors Landscape Architects July 2, 2002 Ms. Linda Lewis N.C. Department of Environment, Health, and Natural Resources Division of Water Quality Section 127 Cardinal Drive Extension Wilmington. NC 28405 Re: Snow's Cut Crossing New Hanover County NCDWQ Project No. SW8 000851 Dear Ms. Lewis: ry r� '__1 The developer requested that WK Dickson & Co., Inc. prepare the engineer's certification since they performed all of the construction surveying. Please see the attached engineer's certification as required by the stormwater permit. Very truly yours, WK Dickson & Co., Inc. At" �^Je-- Mark N. Hargrove, P.E. Enclosures: As noted above cc: Keith Stark, Cape Fear Paving w/ encl. Bill Beauchene, Ravenei Development Corporation w/ encl. 909 Markel Street Wilmington, North Caroiina 28401 Other offices: Charlotte, NC 910.762A200 Asheville, NC Columhia, SC Fax 910.762,4201 Mania, GA Hickory, NC www.wkdickson.com Boca Raton, FL Raleigh, NC // Snow's Cut Crossing New Hanover County Sto mwater Project No. 1W8 00085 i Dcsiguer's Certification 1, 14A ok. A) � 1�Q �� (Uy9- , as a duly registered r Of p' 6 '; ee K- in the State of -North Carolina, having been authorized to observe nodical /yly ) the construction of the project, ow S CV4 C'C'55 /tvqLF roject) for 16*"vend Ao-,At aft t fl'roject 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. Required Items to be checked for this certification to be considered complete are on page 2 of this form. Noted deviations from approved plans and specifications: Signature Registration Number 1t%C• %� Date AD O� cc: NCDENR DWQ Regional Office Town of Carolina Beach Building lnspcctions SL-AL of Ss�R����.,' SEAL 9 19742 r Certification Requirements: r ►4�_1. The drainage area to the system contains approximately the permitted acreage. (h )Vg_2. The drainage area to the system contains no more than the permitted amount o f built -upon area. 1yIN}} 3. All the built -upon area associated with die project is graded such that the runoff drains to the system. �4. The outlet bypass structure elevations are per the approved plan. APJ 5. The outlet structure is located per the approved plans. qA-6_ Trash rack is provided on the outlet/bypass structure_ ItPM 7. All slopes Y} sj are grassed withpermanentvegetation. v,r` k- emi u,r J �cvAe--ti MO-e'/ de44k1 'Lo'­ ciA hotAl'e- 5paf5e_ CI�Ci�J� 6LJl 8. Vegetated slopes are no steeper than 3:1. J MIA 9. The inlets are located per the approved plans and do not cause short-circuiting of the system. /rNL10. The permitted amounts of surface area and/or volume have been provided. jM �7�1 t. Required drawdown devices are correctly sized per the approved plans. J /V _11 All required design depths are provided. 1J)4 13. All required parts of Pe system are provided, such as a vegetated shelf, and a forebay. /11 Ll4. The overall dimensions of the system, as shown on dhe approved_ plans, are providcd. '���.^o•�tr�ecQ ilo�vme5 �►'le�`It- o� eX��eec� �-�� pe�w���' !'��Vi�•��eh, cc: NCDENR-DWQ Town of Carolina Beach Building Inspections 4