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HomeMy WebLinkAboutSW3130101_CURRENT PERMIT_20130423I STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE DOC DATE �A, 4 a LRol YYYYMMDD A�`*YAF NC®ENR l North Carolina Department of Environment and Natural Resources Pat McCrory Governor Mr. Branson L. Patch Historic Ventures, LLC 2409-B Plantation Center Dr. Matthews, NC 28105 Division of Water Quality Charles Wakild, RE. Director April 5, 2013 Subject: Stormwater Permit No. SW3130101 Waxhaw Mixed Use Phase 1 High Density Commercial Wet Pond Project Union County Dear Mr. Patch: John E. Skvarla, III Secretary RECEIVED DIVISION OF kYATER QUALITY APR 2 3 21313 MOORESVILLE RE'UiOli OFFICI The Stormwater Permitting Unit received a complete Stormwater Management Permit Application for the subject project on April 4, 2013. 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 02H .1000. We are forwarding Permit No. SW31.30101, dated April 5, 2013, for the construction, operation and maintenance of the subject project and the stormwater BMPs. This permit shall be effective from the date of issuance until April 5, 2021 and shall be subject to the conditions and limitations as specified therein, and does not supersede any other agency permit that may be required. Please pay special attention to the conditions listed in this permit regarding the Operation and Maintenance of the BMP(s), recordation of deed restrictions, procedures for changes of ownership, transferring the permit, and renewing the permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system, to record deed restrictions, to follow the procedures for transfer of the permit, or to renew the permit, will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes. Per NCGS 143- 215(e) the petition must be Filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding. This project will be kept on file at the Mooresville Regional Office. If you have any questions, or need additional information concerning this matter, please contact Robert Patterson at (919) 807-6375; or robert.patterson@ncdenr.gov. Sincerely, for Charles Wakild, P.E., Director Wetlands and Stormwater Branch 1617 Mall Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-63,01 FAX: 919.807.6494 Internet: www ncwuterquality.org An Equal Opportunil.; l Affirmative Action Emi 011C NorthCarolina Naturally Mr. Branson L. Patch SW3130101 — Waxhaw Mixed Use Phase 1 April 5, 2013 cc:-SW3130101 File ec: Hy V. Nguyen, PE — DPR Associates, Inc. Michael Parker - Mooresville Regional Office Page 2 of 2 State Stormwater Permit Permit No.SW3130101 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Historic Ventures, LLC Waxhaw Mixed Use Phase 1 300 North Broad St., Waxhaw, Union County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 02H .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 April 5, 2021, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.7 of this permit. The stormwater control has been designed to handle the runoff from 372,428 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated in Section 1.7 of this permit, and per approved plans. 4. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 6. The built -upon areas associated with this project shall be located at least 30 feet landward of all perennial and intermittent surface waters. Page 1 of 6 State Stormwater Permit Permit No:SW3130101 7. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area,'ayes: 11.4 Onsite, ft : 496,584 Offsite, ft2: 0 b. Total Impervious Surfaces, ft2: 372,428 Onsite, ft : 372,428 Offsite, ft2: 0 C. Pond Depth, feet: 5.0 d. TSS removal efficiency: 90% e. Design Storm, inches: 1.0 f. Permanent Pool Elevation, FMS�: 620.50 g. Permitted Surface Area @PP ft . 15,600 h. Permitted Storage Volume, ft�: 41,260 at temporary pool i. Storage Elevation, FMSL: 622.30 j. Controlling Orifice: 3.0"0 pipe k. Permanent Pool Volume, W.-77,525 I. Forebay Volume, ft3: 16,000 m. Receiving Stream/River Basin: Twelve Mile Creek / Catawba n. Stream Index Number: 11-138 o. Classification of Water Body: "C" II. SCHEDULE OF COMPLIANCE The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. The stormwater treatment system shall be constructed in accordance with the approved plans and specifications, the conditions of this permit, and with other supporting data. Page 2 of 6 State Stormwater Permit Permit No.SW3130101 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 7. 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. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 9. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. 12. 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. Ill. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a completed Name/Ownership Change form, to the Division of Water Quality, signed by both parties, and accompanied by supporting documentation as listed on page 2 of the form. The project must be in good standing with the Division. The approval of this request will be considered on its merits and may or may not be approved. 2. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Page 3 of 6 State Stormwater Permit Permit No. SW3130101 3. 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. 4. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which maybe imposed by other government agencies (local, state, and federal) having jurisdiction. 5. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 6. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 7. The permit issued shall continue in force and effect until revoked or terminated. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and re -issuance or termination does not stay any permit condition. 8. 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. 9. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 10. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules and regulations contained in Session Law 2006- 246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al. 11.The permittee shall notify the Division of any name, ownership or mailing address changes at least 30 days prior to making such changes. 12.The permittee shall submit a renewal request with all required forms and documentation at least 180 days prior to the expiration date of this permit. Permit issued this the 51h day of April, 2013. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Gnarles WaKild, F'.t., Uirector Division of Water Quality By Authority of the Environmental Management Commission Page. 4 of 6 State Stormwater Permit Permit No.SW3130101 Waxhaw Mixed Use Phase 1 Stormwater Permit No. SW3130101 Union County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 5 of 6 State Stormwater Permit • . Permit No.SW3130101 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. .4. All roof drains are located such that the runoff is directed into the system. 5. The outlet/bypass structure elevations are per the approved plan. 6. The outlet structure is located per the approved plans._: 7. Trash rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short- circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. Required drawdown devices are correctly sized per the approved plans. 13. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. Please submit this Designer's Certification to: Mooresville Regional Office Surface Water Protection 610 East Center Ave., Ste. 301 Mooresville, NC 28115 Cc: Union County Page 6 of 6 MCDENR North Carolina Department of Environment and Natural Resources Pat McCrory John E. Skvarla, III Govemoi April 22, 2014 Mr. Branson L. Patch Historic Ventures, LLC 2409-B Plantation Center Dr. Matthews, NC 28105 Subject: Compliance Evaluation Inspection Waxhaw Mixed Use Phase 1 Permit No. SW3130101 High Density Commercial Wet Pond Project Union County Dear Mr. Patch: Enclosed is a copy of the Compliance Evaluation Inspection (CEI) report for the inspection conducted on April 17, 2014 by Mr. Samar Bou-Ghazale of this Office. The reports should be self-explanatory-, however, should you have any questions concerning the report, please do not hesitate to contact Mr. Bou-Ghazale at (704) 663- 1699 Ext.2199. Sincerely, Zahid S. Khan, CPM, CPESC, CPSWQ -- ---- --------......--- Regional Engineer Land Quality Section Attachment Division of Energy, Mineral, and Land Resources Land Quality Section - Mooresville Regional Office 610 East Center Avenue, Suite 301, Mooresville, North Carolina 28115 Telephone: 704-663-16991 FAX 704-663-6040 a Internet: http:llpogal.ncdenr.org/web/Ir/land-quality An Equal Opportunity ! Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper Compliance Inspection Report Permit:' SW3130101 Effective: 04/05/13 Expiration: 04/05/21 - Owner: Historic Ventures LLC County: Union Region: Mooresville Project: Waxhaw Mixed Use Phase 1 300 N Broad St Contact Person: Branson L Patch Title: Directions to Project: Property is located between hwy 16 and broad st bounded by prince st 8 bivens st Type of Project: State Stormwater - HD - Detention Pond Drain Areas: 001 - (Twelvemile Creek) (03-08-38) ( C) On -Site Representative(s): Related Permits: Inspection Date: 04/17/2014 Entry Time: 01:35 PM Primary Inspector: Samar E Bou Ghazale Secondary Inspector(s): Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: 0 Compliant ❑ Not Compliant Question Areas: Z State Stormwater (See attachment summary) Waxhaw NC 28173 Phone: Exit Time: 01:45 PM Phone: 704-663-1699 Ext.2199 Inspection Type: Compliance Evaluation Page: 1 Permit: 5W3130101 Owner - Project: Historic Ventures LLC Inspection Date: 04/17/2014 _._._ Inspection Type: Compliance Evaluation. Reason for Visit: Routine Inspection Summary: No construction as of this date. Page: 2 DWQ USE ONLY Date Received Fee Paid Permit Number z t SoS SWX30L01 Applicable ules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008 KI Ph II - Post Construction (select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ M mt Plan: State of North Carolina Department of Environment and Natural Resources Division of Water Quality MVISION OE C�IVh�D "� QUALITY APR 2 3 ?013 STORMWATER MANAGEMENT PERMIT APPLICATION FQRM, ,4 I P ! f g - „EuVfLLE R�GiOINAL OFFICE This orrtr r�tm be Itotarn pied or use as air original 1. GENERAL INFORMATION 1. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): WAXHAW MIXED USE PHASE 1 2. Location of Project (street address): 300 North Broad Street City: WAXHAW County:UNION Zip:28173 $��4 3. Directions to project (from nearest major intersection): Property located between Highway 16 and Broad St., bounded. by Price St. & Bivens St. 4. Latitude:34 ° 55' 27.8394" N Longitude:80° 44' 36.96" W of the main entrance to the project. II. PERMIT INFORMATION: ].a. Specify whether project is (check one): NNexv ❑Modification ❑ Renewal w/ Modificationt tRenezoals zoith modifications also requires SWU-102 - Ren 7ml Application Fora¢ b.If this application is being submitted as the result of a modification to an existing permit, list the existing permit number , its issue date (if known) _ , and the status of construction: ®Not Started ❑Partially Completed* ❑ Completed* *provide a designer's certification Specify the type of project (check one): ❑Low Density NI-ligh Density ❑Drains to an Offsite Stormwater System ❑Other 3. If this application is being submitted as the result of a previously returned application or a letter from DWQ requesting a state stormwater management permit application, list the stormwater project number, if assigned, and the previous name of the project, if different than currently proposed, 4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ❑NPDES Industrial Stormwater ®Sedimentation/Erosion Control: 12 ac ac of Disturbed Area 0404/401 Permit: Proposed Impacts b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number, issue date and the type of each permit: M/ruleslaws 5. is the project located within 5 miles of a public airport? ❑No ®YesIf yes, see S.L. 2072-200, Part VI: htt ortal.ncdenr.or web w ws su st Form SWU-101 Version 06Aug2012 Page 1 of a III. CONTACT INFORMATION 1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the project): Applicant/Organization:Historic Ventures, LLC Signing Official & Title:Branson I_. Patch / Manager b.Contact information for person listed in item I above: Street Address:2409-8 Plantation Center Drive City:Matthews Mailing Address (if applicable): City: Phone: Email: State:NC Zip:28105 State: Fax: ( Zip: Please check the appropriate box. The applicant listed above is: ® The property owner (Skip to Contact Information, item 3a) ❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below) ❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and 2b below) ❑ Developer* (Complete Contact Information, item 2a and 2b below.) 2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the person who owns the property that the project is located on): Property Owner/Organization: Signing Official & Title: b.Contact information for person listed in item 2a above: Street Address: City: State: Zip: Mailing Address (if applicable): City: Phone: Email: Sta Fax: ( 3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other person who can answer questions about the project: Other Contact Person/Organization: Signing Official & Title: b.Contact information for person listed in item 3a above: Mailing Address: City: State: Zip: Phone: ( } Fax: ( ) Email: Form SWU-101 Version 06Aug2012 Page 2 of 7 4. Local jurisdiction for building permits: Town of Waxhaw, NC Point of Contact:Williani Whaley Phone #: (704 ) 843-2195 ext 231 IV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the storm water runoff will be treated. The proposed stormwa ter BM Wet Detention Pond is to Rrovided water 9 uaIi treatment and detention control for the proposed mixed use development (overall built out condition). also see_DPR Project Narrative. 2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued Date: ❑ Other: Date: b. If claiming vested rights, identify the regulation(s) the project has been designed in accordance with: ❑ Coastal SW -1995 ❑ Ph II - Post Construction 3. Stormwater runoff from this project drains to the Catwaba River basin. 4. Total Property Area: 14.9 acres 5. Total Coastal Wetlands Area: 0 acres 6. Total Surface Water Area: 0 acres 7. Total Property Area (4) -Total Coastal Wetlands Area (5) -Total Surface Water Area (6) ='I'otal Project Area*:14.9 acres Total project area shall be calculated to exclude the following the normal pool of impounded structures, the area between the batiks of streams and rivers, the area below the Normal High Water (NHW) lime or Mean High Water (MHW) line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area rs used to calculate overall percent built upon area (B UA). Non -coastal wetlands landward of the NHW (or MHW) line may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area / TotaI Project Area) X 100 = 75 % 9. How many drainage areas does the project have?1 (For high densihj, corurt T for each proposed engineered stormwater BMP. For low density and outer projects, use I for fire whole properhj area) 10. Complete the following information for each drainage area identified in Project Information item 9. If there are more than four drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Form SWU-101 Version 06Aug2012 Page 3 of 7 Basin Information Drainage Area 1 Drainage Area Drainage Area Drainage Area _ Deceiving Stream Name Twelvemile Creek Bypass Twelvemile Creek Stream Class C C Stream Index Number * 11-138 11-138 Total Drainage Area (so 496,594 152,460 On -site Drainage Area (so 496,584 - Off -site Drainage Area (SO - 152,460 Pro osed Impervious Area** (so 372,428 108,900 % Impervious Area** total 75 71.4 Impervious— Surface Area Drainage Area 1 Drainage Area Drainage Area _ Drainage Area _ On -site Buildings/L.ots (so i +/-P4;713* Bypass pp �� *See Attached Impervious CaIcualtions On -site Streets (so +/-162,895* - On -site Parking (so - - On -site Sidewalks (so - - Other on -site (so +/-14,619* - Future (so - - Off -site (SO - - Existing Existing BUA*** (so - 31 Tq +/-108,900 Total (so: +/-372,227* +/-108,900 Stream Class and Index Number can be determined at: lzttp. portal.rzcderir.or,�,lzireljAi)g4i.g/csra/classificirtiolis * Iat )ervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, siezualks, gravel areas, etc. ** Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that is to be removed and which zrill he replaced by new BUA. 11. How was the off -site impervious area listed above determined? Provide documentation. Bypass drainage area of +/-152,460sf includes existing +/-108,900sf built upon area to be replaced with +/-108,900sf of redevelopment. Protects in Union County: Contact DWQ Central Office staff to check if the project is located within a Threatened Endangered Species watershed that may be subject to more stringent stornnvater requirements as per I SA NCAC 0213 ,0600. V. SUPPLEMENT AND O&M FORMS The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded from http://,portal.ncdenr.org/web/­wn/ws/su/bmp-manual. V1. 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. A detailed application instruction sheet and BMP checklists are available from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms does. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map at http://portal.ncdenr.org/webZwq/wsZsuZmaps.) Please indicate that the following required information have been provided by initialing in the space provided for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions for each submitted application package from http://portal.ncdenr.org/%veb/wq/ws/su/statesw/forms does. gals 1. Original and one copy of the Stormwater Management Permit Application Form. 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants _ Form. (if required as per Part V11 below) Form SWU-101 Version 06Aug2012 Page 4 of 7 3. Original of the applicable Supplement Forni(s) (sealed, signed and dated) and O&M agreement(s) for each BMP. 4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to http://www.envhelp.org/pages/onestopexpress.litniI for information on the Express program and the associated fees. Contact the appropriate regional office Express Permit Coordinator for additional information and to schedule the required application meeting.) 5. A detailed narrative (one to two pages) describing the stormwater treatment/managementfor the project. This is required in addition to the brief summary provided in the Project Information, item 1. 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the'/z mile radius on the map. 7. Sealed, signed and dated calculations (one copy). 8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including: a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. e. North arrow, f. Scale. g. Revision number and dates. h. Identify all surface waters on the plans by delineating the normal pool elevation of impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal waters, and any coastal wetlands landward of the MHW or NHW lines. • Delineate the vegetated buffer Iandward from the normal pool elevation of impounded structures, the banks of streams or rivers, and the MI-IW (or NHW) of tidal waters. i. Dimensioned property/project boundary with bearings & distances. j. Site Layout with all 13UA identified and dimensioned. k. Existing contours, proposed contours, spot elevations, finished floor elevations. I. Details of roads, drainage features, collection systems, and stormwater control measures. in. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a qualified person. Provide documentation of qualifications and identify the person who made the determination on the plans. n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations. o. Drainage areas delineated (included in the main set of plans, not as a separate document). p. Vegetated buffers (where required). 9. Copy of any applicable soils report with the associated SHWT elevations (Please identify _ elevations in addition to depths) as well as a map of the boring locations with the existing elevations and boring logs. Include an 8.5"xl1" copy of the NRCS County Soils map with the project area clearly delineated. For projects with infiltration BMPs, the report should also include the soil type, expected infiltration rate, and the method of determining the infiltration rate. (Infiltration Devices submitted to WiRO: Schedule a site visit for DWQ to verifil the SHWT prior to submittal, (970) 796-7378.) 10. A copy of the most cu rrent property deed. Deed book: 5023 Page No: 498 11. For corporations and limited liability corporations (LLC): Provide documentation from the NC Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in Contact Information, item la, 2a, and/or 3a per 15A NCAC 21-1.1003(e). The corporation or LLC must be listed as an active corporation in good standing with the NC Secretary of State, otherwise the application will be returned. http:/ /www.secretarystate.nc.us/CorRorations/CSearch.aspx Form SWU-101 Version 06Aug2012 Page 5 of 7 VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed BUA allocations vary, a table listing each Iot number, lot size, and the allowable built -upon area must be provided as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and protective covenants forms can be downloaded from littp://portal.ncdenr,org/web/wn/NN,s/su/states",jforms dots. Download the latest versions for each submittal. In the instances where the applicant is different than the property owner, it is the responsibility of the property owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring that the deed restrictions are recorded. By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and protective covenants for this project, if required, shall include all the items required in the permit and listed on the forms available on the website, that the covenants will be binding on all parties and persons claiming under them, that they will run with the Iand, that the required covenants cannot be changed or deleted without concurrence from the NC DWQ, and that they will be recorded prior to the sale of any lot. VII1. CONSULTANT INFORMATION AND AUTHORIZATION Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as addressing requests for additional information). Consulting Engineer:Hy V. Nguyen Consulting Firm: DPR Associates, Inc. Mailing Address:420 Hawthorne Lane City:Charlotte State:NC Zip:28204 Phone: (704 ) 332-1204 K.30 Fax: (704 } 332-1210 Eniail:hnguyen@dprassociates.net IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, rtern 2 has been filled out, complete this section) 1, (print or type.name of person listed in Contact Information, item 2a) , certify that I own the property identified in this permit application, and thus give permission to (print or type name of person listed in Contact Information, item 7a) with (print or type name of organization listed in Contact Information, item 1a) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal, which indicates the party responsible for the operation and maintenance of the stormwater system. Form SWU-101 Version 06Aug2012 Page 6 of 7 As the legal property owner ] acknowledge, understand, and agree by my signature below, that if my designated agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a completed Name/Ownership Change Form within.30 days; otherwise I will be operating a stormwater treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6. Signature: Date: a Notary Public for the State of . County of do hereby certify that personally appeared before me this — day of _ , and acknowledge the due execution of the application for a stormwater permit. Witness my hand and official sea], SEAL My commission expires f X. APPLICANT'S CERTIFICATION f 1, (print or type name of person listed in Contact Information, item 1a) T.1'A certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of the applicable stormwater rules under 15A NC 2H .1000 and any other applicable state stormwater requirements. Signature: Date: I t z I, D1 QWJ)')1a Notary Public for the State of NO (AIrv/+n07County of r-TVur do hereby certify thatlGl1'I �-'�'G �'-1 personally appeared before me this 2 day of _M)0"I b4�f PO/A-, and acknowledge the due execute i of e application for a stormwater permit. Witness my hand and official seal, %%6110464"'a e' o j a� m '10ac,�rrt �►. +� ••• - SEAL My commission expires a 3 ro Form SWU-101 Version 06Aug2012 Page 7 of 7 �v If r Permit Num.ber: v .713O/OJ (to be provided by D111Q) Drainage Area Number: I Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does %does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ®,does not incorporate pretreatment other than a forebay. Important maintenance procedures: - ImmediateIy after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). - No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. - Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. - if the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. - Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page I of 4 . . 1 Permit Number: 5y3130101 (10 be provided b), DIVQ) Drainage Area Number: 1 BMP element: Potentialproblem: How 1 will remediate the roblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the Swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to Swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sedimentstorage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional Show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4 Permit Number: ,SW 3130�0! (to he provided by UIYQ) Drainage Area Number: f BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth -reads feet in the main pond, the.. sediment shall be removed.i When the permanent/pool depth reads feet in the forebay, the sediment shall be removed. Sediment Removal Bottom Elevat BASIN DIAGRAM Ull in the blanks) Permanent Pool Elevationlc?_>O- — -------- iYPemanenPool olume ------Sediment Removal Elevation Volume Min.-------%%--- ediment Bottom Elev 'bns�1-11 n. Storage Sediment Storage EBAY MAIN POND Form SW40i-Wet Detention Basin O&M-Rev.4 Page 3 of. 4 Permit Number: SW3 j j O l0 (to he Provided by DIYO acknowledge and agree by my signature below that I am responsible for the performance of the 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. Projecl nante: USE BMP drarncige area number: Print name: T->�Z_(k Title: ,+U1 AN0, V-, Address: (Z Phone: 76--� Signature: Date: 1 t I Z t Z- Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I YL2 a Notary Public for the State of �3p%`Irn C_AA It'nk County of do hereby certify that r4u'1� ifi l' C-� personally appeared before me this • day of f)tNt*Y)lae tr , c�LO Icy; and acknowledge the due execution of the forgoing wet detention basin maintenance requi e ents. Witness my hand and official seal, �OP. t X { SEAL My commission expires Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 I Permit No. 5w3 1 3 01 D 1 (to be provided by DWO) mm T A E, � r NCDENR fl STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 11f) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION Project name Waxhaw Mixed Use Contact person DPR Associates, Inc. (Hy Nguyen P.E.) Phone number 704-332-1204 Date December 28, 2012 Drainage area number BMP #1 Ill. DESIGN INFORMATION Site Characteristics Drainage area 496,584 ftz Impervious area, post -development 372,438 rye % impervious 75.00 % Design rainfall depth 1.0 in Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5" runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is the prelpost control of the 1 yr 24hr storm peak flow required? 1-yr, 24-hrrainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr stone Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the perm. pool elevation) Top of 10ft vegetated shelf elevation Bottom of 1Oft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided 1s there additional volume stored above the state -required temp, pool? Elevation of the top of the additional volume 30,002 ft3 46. DK, volume rovided is equal to or in excess of volume required. ft3 ft3 it ft3 ft3 Y (Y or N) 2.6 in 62.00 (unifless) 89.00 (unitless) 2.58 inlhr OK 2.00 tt3lsec 31.68 ft3lsec 29.68 ft3lsec -0&50-fmsl-j 620,50 fmsl -- fmsl 621.00 fmsl 620,00 fmsl 610,50 fmsl 608.00 fmsl 2.50 It 62Z,3 (Alirv'r ,4V41Ly 01.tT i. }i�rra- Data not needed for calculation option #1, but OK if provided. Data not needed for calculation option #1, but OK if provided. —N----;5Y or N) f fmsl Form SW401-Wet Detention Basin-Rev.9-4118112 Parts 1. & II. Design Summary. Page 1 of 2 Permit W. 313 I Ca 1 (to be provided by DINO) tI. DESIGN INFORMATION Surface Areas P Area, temporary pool t5;394 ft, Z �l g �' Z Z r , ON/ Area REQUIRED, permanent poot 454-ft' SAIDA ratio -0-ff (unitless) 3' Area PROVIDED, permanent pool, Ap, v-1 15,600 ft` OK Area, bottom of 1Oft vegetated shelf, Aba ,nal 13,300 ft` Area, sediment deanout, top elevation (bottom of pond), Aba_, d . 2,900 ft` Volume, temporary pool 622 3 N wT A1.*l6 fl3Insufficient. Volume does not agree with data previously entered. av-ru VyY 3 Volume, permanent pool, Vp._" 77,525 ft Volume, forebay (sum of forebays if more than one forebay) 16,000 rya Forebay % of permanent pool volume 20.6% % OK SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? MountairdPiedmonl SAIDA Table Used? SAIDA ratio Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Volume, permanent pool, V,--,,d Area provided, permanent pool, An,,,,_P, Average depth calculated Average depth used in SAIDA, dv. (Round to nearest 0.5ft) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, A,,_,, Area, bottom of 1 Oft vegetated shelf, Aba shw Area, sediment cleanout, lop elevation (bottom of pond), Abate 90 % N (Y or N) Y (Y or N) 44Hunitless) Y (Y or N) 77,525 ft' 15,600 ft` 4,97 ft OK 5.0 ft OK N (Y or N) 15,600 W 13,300 ft` 2.900 ft2 'Depth' (distance bIw bottom of 1 Oft shelf and top of sediment) 9.50 ft Average depth calculated 5.00 It OK Average depth used in SAIDA, d., (Round to down to nearest 0 5ft) 5.0 ft OK Drawdown Calculations Drawdown through orifice? Diameter of orifice (if circular) Area of orifice (if -non -circular) Coefficient of discharge (Co) Driving head (Ho) Drawdown through weir? Weir type Coefficient of discharge (C„.) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir} Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width ratio Length to width ratio Trash rack for overflow & orifice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all runoff at ultimate build -out? Drain mechanism for maintenance or emergencies is: Y (Y or N) 3.00 in in' 0,60 (unitless) 1.59 ft N (Y or N) (unitless) (unitless) ft ft 2.00 ft'Isec --:3Ys6&0sec ft'tsec F1 �L J d s 3 :1 OK 10 :1 OK 10.0 ft OK :1 Y (Y or N) OK 1,0 ft OK N (Y or N) OK Y JY or N) OK Y (Y or N) OK Gravity Drain & Pump Form SW401-Wet Detention Basin-Rev."118112 Parts I. & If. Design Summary, Page 2 of 2 Permit No. SW313010/ (to be provided by D WQ) Jill. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. 1. Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, #41 OH -site drainage (if applicable), wo Delineated drainage basins (include Rational C coefficient per basin), +/ Basin dimensions, Or Pretreatment system, „/ High Flow bypass system, ve Maintenance access, ✓ Proposed drainage easement and public right of way (ROW), r% Overflow device, and Boundaries of drainage easement. %/ 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: Outlet structure with trash rack or similar, ,d Maintenance access, r/ Permanent pool dimensions, Forebay and main pond with hardened emergency spillway, r/ Basin cross-section, NI Vegetation specification for planting shelf, and s✓ Filter strip. A1* 6.A 3. Section view of the wet detention basin (1" = 20' or larger) showing: Side slopes, 3:1 or lower, we Pretreatment and treatment areas, and 1tI Inlet and outlet structures. oe 4. It the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin, _ 5. A table of elevations, areas, incr mental volumes & accumulated volumes for overall pond and for forebay, to verify volume provided. 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized.. ve 7. The supporting calculations. % 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. 9. A copy of the deed restrictions (if required). N 14% 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.9-4118112 Part III. Required Items Checklist, Page 1 of 1