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HomeMy WebLinkAboutSW1131101_CURRENT PERMIT_20140321STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW49dal DOC TYPE �URRENTPERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE DOC DATE ��O5,q YYYYMMDD A i�' A r NCDENR North Carolina Department of Environment and Natural Resources Division of Energy, Mineral, and Land Resources Land Quality Section Tracy E. Davis, PE, CPM Director December 11, 2013 Mr. Michael A. Kahn, Vice President Empire Distributors of North Carolina, Inc. 13833 Carowinds Blvd, Charlotte, North Carolina 28723 Pat McCrory, Governor John E. Skvarla, III, Secretary Subject: Stormwater Permit No. SW1131101 Empire Distributors of NC Warehouse Facility - Mills River High Density Commercial Bio-Retention Project Henderson County Dear Mr. Kahn: y MAR 2 1 2014 I'.r'"2:l :71 1lty Section ;;.5r7eville The Stormwater Permitting Unit received a complete Stormwater Management Permit Application for the subject project on November 13, 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 2H.1000 and Session Law 2006-246. We are forwarding Permit No. SW1131101, dated December 11, 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 December 11, 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. After thirty days from the date of this permit, this project will be kept on file at the Asheville Regional Office. After that time, please contact Jonathan Stepp, Asheville Regional Office, 828-296-4500, jonathan.steppC�ncdenngov, with any questions. In the interim, if you have any questions, or need additional information concerning this permit, please contact Bill Diuguid at (919) 807-6369; or bili,diuguid@ncdenr.gov. 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone 919.707-92201 FAX 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina 27604 - Internet: hitp:llportal.nodenr.org/webllrlland-quality An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 1 10% Post Consumer Paper ROU352 rV77 CIE., - , Mr. Michael A. Kahn, Vice Oident • Empire Distributors of North Carolina, Inc. Warehouse Facility - Mills River, Henderson County SW1131101 December 11, 2013 Sincerely, Original Signed by William H. Diuguid William H. Diuguid, AICP, Plans Reviewer for Tracy E. Davis, P.E., Director cc: SW1131101 File ec: William G. Lapsley, P.E., William G. Lapsley and Associates Laura Herbert, Asheville Regional Office, Land Quality Section, NCDENR DEMLR Jonathan Stepp, Asheville Regional Office, Land Quality Section, NCDENR DEMLR 0 Wate Stormwater Permit ermit No. SW1131101 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF ENERGY, MINERAL AND LAND RESOURCES LAND QUALITY SECTION 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 Empire Distributors of North Carolina, Inc. Empire Distributors Warehouse Facility Broadpointe Drive, Mills River, Henderson County FOR THE construction, operation and maintenance of two bioretention cells in compliance with the provisions of Session Law 2006-246 and 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Energy, Mineral and Land Resources, Land Quality Section and considered a part of this permit. This permit shall be effective from the date of issuance until December 11, 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 on page 3 of this permit. The stormwater control has been designed to handle the runoff from 511,653 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area as indicated in Section 1.7 of this permit, and per the application documents and as shown on the 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 Page 1 of 6 Wtate Stormwater Permit ermit No. SW1131101 landward of all perennial and intermittent surface waters. 7. The following design criteria have been provided in the two bioretention cells and must be maintained at design condition: A B a. Drainage Area, ?cress Onsite, ft : 393,470 494,056 Offsite, ft2: 0 21,724 b. Total Impervious Surfaces, ft2: 241,224 270,429 Onsite, ft : 241,224 270,429 Offsite, ft2: 0 0 C. Design Storm, inches: 1.0 1.0 d. Max. Ponded Depth, feet: 0.75 0.75 e. Seasonal High Water Table, fmsl: 2060.0 2060.0 f. Planting Media Depth, feet: 2' 2' g. Cell Dimensions, feet: 261 x106 340x88 h. Planting Elevation, fmsl: 2069.0 2076 i. Planting Surface Area, ft2: 29,338 31,866 j. Permitted Storage Volume, ft3: 21,374 23,150 k. Bypass 1 Storage Elevation, fmsl: 2069.75 2076.75 I. Predevelopment 1 year 24 hour: NIA NIA M. Post development 1 year 24 hour: NIA NIA n. Drawdown Time, hours: 36 38 o. Underdrain Diameter, inches: 6" 6" P. Total number of plants provided: Not shown Not Shown q. Receiving Stream/River Basin: French Broad McDowell Cr r. Stream Index Number: 6-(54.5) 6-58 S. Classification of Water Body: "B" °C" II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all time 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 re -vegetation of slopes and the filter strip. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans. f. Debris removal and unclogging of all drainage structures, level spreader, filter media, planting media, underdrains, catch basins and piping. g. Access to the cell and outlet structure must be available at all times. 4. Records of maintenance activities must be kept for each permitted BMP. The reports will indicate the date, activity, name of person performing the work and what actions were taken. 5. The permittee shall submit to the Division of Energy, Mineral and Land Resources, Land Quality Section, an annual summary report of the maintenance and inspection records for each BMP. The report shall summarize the inspection dates, results of the inspections, and the maintenance work performed at each Page 2 of 6 rJ ' ate Stormwater Permit PPermit No. SW1131101 inspection. 6. 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. 7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 9. Access to the stormwater facilities shall be maintained via appropriate recorded easements at all times. 10. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 12. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. 13. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. 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 signed by both parties, to the Division of Energy, Mineral and Land Resources, Land Quality Section, accompanied by the supporting documentation as listed on page 2 of the form. Page 3 of 6 El Sate Stormwater Permit Permit No. SW1131101 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 a request to transfer the permit. 3. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Energy, Mineral and Land Resources, Land Quality Section, 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 may be 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 in writing 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 11th day of December, 2013. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Original Signed by William H. Diuguid William H. Diuguid, AICP, Plans Reviewer for Tracy E. Davis, P.E., Director Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Page 4 of 6 r] "Pterm ate Stormwater Permit it No. SW1131101 Empire Distributors of NC Warehouse Facility, Mills River Henderson County Stormwater Permit No. SW1131101 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 Name) 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. SW1131101 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, per the vegetation plan. 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. M. Laura Herbert, Jonathan Stepp, Land Quality Section NCDENR-DEMLR, Asheville Regional Office 2090 U.S. Highway 70 Swannanoa, NC 28778 Page 6 of 6 TO: ®WGLA Engineering,Pdf Consulting Engineers & Land Planners Landon Davidson 214 North King Street Hendersonville, North Carolina 28792 Phone(828>687-7177 www.wgla.com MEMORANDUM FROM: William G. Lapsley, P.E. COMPANY: DATE: NC Division of Water Quality 12/22/2014 FAX NUMBER: TOTAL NO. Ol, PAGP.S INCLUDING COVFR: PHONE. NUMBER: 1C'GI.A PROJECT NUMBER: RH: YOUR RIiE'LRENCl NUMB]?R: Empirc Distributors, Henderson County, Mills River ❑ URGENT ❑ FOR REiVIEW ❑ PLIVSH COMMENT ❑ PLIVSH REPLY ❑ PUO SE3 RF,CI'Cl,lr, NOTT.S/COMMENTS: Landon: Enclosed please find the Engineer's Certification of Completion of the Stormwater facilities permitted under DWQ — SW 1131101. The system is in good shape and functioning properly. If you have any questions please feel free to contact our office. Bill d,��+-P J 7a� DEC 2 3 2M4 .and Quality section Ashev ile THIS FACSIMILE MESSAGE IS CONFIDENTIAL AND IS INTENDED SOLELY FOR THE ADDRF?SSE?E? ABOVE NAMED. 11" YOU ARE, NOT THE INTENDED RECIPIENT OR THE PERSON RESPONSIBLE FOR DELIVERY TO TILE+. INTENDED RF:CfPIENT, YOU ARE. ADVISED THAT ANY DISSEMINATION, DISTRIBUTION OR COPYING OF T11IS MESSAGE IS PROHIBITED. IF YOU HAVE RECEIVED THIS ME.SSAGF, IN E.RROR,YOU ARE REQUESTED TO PLEASE NOTOW T1 1, SENDER BY TELEPHONE. COLLECT AND TO RETURN THE OR"KNAL MESSAGE TO THE SENDER BY U.S. MAIL, !/ ® atG Stormwater Permit Permit No. SW1131101 Empire Distributors of NC Warehouse Facility, Mills River Henderson County Stormwater Permit No. SW1131101 Designer's Certification I, r �\c` 1p , as a duly registered . �1r�D�pk il� in the State of North Carolina, havirig been authorized to obseCoLriodica eekly/ full time) the construction of the project, - ��M 6 rE �%K {�. C . � ►'tD t�LS� (Project me) � �11 DY �{ •C, � for C (Project Owner) hereby state that, to the best of y 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 abd specification: SI:zAL Signature ti. Registration Number.IQ c Date- Page 5of6 71 State Stormwater Permit .Permit No. SW1131101 Certification Requirements: The drainage area to the system contains approximately the permitted acreage. The drainage area to the system contains_ no more than the permitted amount of built -upon area: All the built -upon area associated, with the project is graded such that the runoff drains to the system. All roof drains are located such that the runoff is directed into the system. The outlet/bypass structure elevations. are per'the approved plan. The outlet structure is located per the approved plans: Trash rack is provided on the outlet/bypass structure. 411 slopes are grassed with permanent vegetation, per the .vegetation plan. Vegetated slopes are no steeper than 11. The inlets are located per the approved plans and do riot cause short- inl rcuiting of the system. Fhe permitted amounts of surface area and/or volume have been )rovided, Required drawd.own devices are correctly sized per the approved plans. N11 required design depths are provided... NII required parts of the system are provided, such as a vegetated shelf, )nd. a foreb:ay, fhe required system dimensions are provided per the approved plans. cc: Laura Herbert, Jonathan Stepp, Land Quality Section NCDENR-DEMLR, Asheville Regional Office 2096 U.S. Highway 70 Swannanoa, NC 28778 Page 6 of 6 Permil Number: (to be provided by DWQ) � o�4F W a rFRac A 5� NCIDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM BIORETENTION CELL SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. I. PROJECT INFORMATION Project name Empire Distributors of North Carolina, Inc. Contact name Jose Restrepo Phone number 254-770-5562 Dale August 28, 2013 Drainage area number A II, DESIGN INFORMATION Site Characteristics Drainage area 393:470 ftz Impervious area 241,224 ft' Percent impervious 61.3°% % Design rainfall depth 1.0 inch Peak Flow Calculations Is pre/post control of the 1-yr, 24-hr peak flow required? 1-yr, 24-hr runoff depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak control 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 Cell Dimensions Ponding depth of water Pending depth of water Surface area of the top of the bioretention cell Length: Width: -or- Radius Media and Soils Summary Drawdown time, ponded volume Drawdown time, to 24 inches below surface Drawdown time, total: in -sift, soil Soil, permeability Planting media soil: Soil permeability Soil composition % Sand (by volume) % Fines (by volume) % Organic (by volume) Phosphorus Index (P-Index) of media Form SW4a1-bioretention-Rev.8 June 25, 2010 N (Y or N) in in/hr ft3isec ft'isec ft'/sec 19,731.0 ft' 21,374.0 ft3 OK OftJ a 9 inches OK 0,75 ft :. _.. . . 29,338.0 ftz OK 261 ft OK LIAR 2 1 2C14 106 ox ft " 9anty Section 9 hr OK 1::�f jitrtllf' 27 hr OK 36 hr 0.01 in/hr Insufficient. Increase infiltration rate or include underdrains. 1.00 in/hr OK 85% OK 10% CK 5% OK Total: 100°% 20 (unitless) OK Parts I and II. Design Summary, Page 1 of 2 Permit Number: (to be provided by OWQ) Basin Elevations Temporary pool elevation Type of bioretention cell (answer "Y" 10 only one of the two following questions): Is this a grassed cell? Is this a cell with trees/shrubs? Planting elevation (top of the mulch or grass sod layer) Depth of mulch Bottom of the planting media sail Planting media depth Depth of washed sand below planting media soil Are underdrains being installed? How many clean out pipes are being installed? What factor of safety is used for sizing the underdrains? (See BMP Manual Section 12.3.6) Additional distance between the bottom of the planting media and the bottom of the cell to account for underdrains Bottom of the cell required SHWT elevation Distance from bottom to SHWT Internal Water Storage Zone (IWS) Does the design include IWS Elevation of the top of the upturned elbow Separation of IWS and Surface Planting Plan Number of tree species Number of shrub species Number of herbaceous groundcover species Additional Information Does volume in excess of the design volume bypass the bioretention cell? Does volume in excess of the design volume flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? Is the BMP located at least 30 feel from surface waters (50 feet if SA waters)? Is the BMP located at least 100 feel from water supply wells? Are the vegetated side slopes equal to or less than 3:1? Is the BMP located in a proposed drainage easement with access to a public Right of Way (ROW)? Inlet velocity (from treatment system) Is the area surrounding the cell likely to undergo development in the future? Are the slopes draining to the bioretention cell greater than 20%? Is the drainage area permanently stabilized? Pretreatment Used (Indicate Type Used with an "X" in the shaded cell) Gravel and grass (flinches gravel followed by 3-5 ft of grass) Grassed Swale Forebay Other 2069,75 fmsl Y (Y or N) OK N (Y or N) 2069 fmsl 0 inches Insufficient mulch depth, unless installing grassed cell, 2067 fmsl 2 ft 0,33 ft Y (Y v N) 30 OK 2 OK 1 ft 2065.67 fmsl 2060 fmsl 5.67 ft OK N (Y or N) fmsl 2069 ft 0 0 Y (Y or N) OK (Y or N) ft (Y or N) Y (Y or N) OK Y (Y or N) OK Y (Y or N) OK Y (Y or N) OK 8.72 ft/sec: Insufficient inlet velocity unless energy disslpaling devices are being used. N (Y or N) OK N (Y or N) OK Y (Y or N) OK X OK Form SW401-Bioretention-Rev.8 June 25, 2010 Parts I and II. Design Summary, Page 2 of 2 Permit No: (to be assigned by 0l Ill. 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. Pagel Plan Sheet No. &__L 1. Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Cell dimensions, Pretreatment system, High flow bypass system, Maintenance access, Recorded drainage easement and public right of way (ROW), Clean out pipe locations, Overflow device, and Boundaries of drainage easement. A 2. Plan details (1" = 30' or iarger) for the bioretention cell showing: Cell dimensions Pretreatment system, High flow bypass system, Maintenance access, Recorded drainage easement and public right of way (ROW), Design at ultimate build -out, Off -site drainage (if applicable), Clean out pipe locations, Overflow devico, and Boundaries of drainage easement. C� Indicate the P-Index between 10 and 30 1�✓ 3. Section view of the bioretention cell (1" = 20' or larger) showing: Side slopes, 3:1 or lower Underdrain system (if applicable), and Bioretention cell layers (ground level and slope, pre-treatment, pending depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable), SHWT level(s), and overflow structure] I Y•!1t'8- 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DVVQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. All elevations shall be in feel mean sea level (fmsl). Results of soils tests of both the planting soil and the in situ soil must include: Soil permeability, Soil composition (% sand, % fines, % organic), and L [ - P-i C 5. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: A variety of suitable species, Sizes, spacing and locations of plantings, Total quantity of each type of plant specified, A planting detail, The source nursery for the plants, and Fertilizer and watering requirements to establish vegetation. G' VAL—. 5D4-- 6. A construction sequence that shows how the bioretention cell will be protected from sediment until the okw�g entire drainage area is stabilized. 7. The supporting calculations (including underdrain calculations, if applicable). 1� 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement. 9. A copy of the deed restriction. Form SW401-Bioretention-Rev.7 Part III, Page 1 of 1 I'crmit Nernl:er: (to be Plavidud by D1,YQ) Drainage Area Number: A Bioretention Operation and Maintenance Agreement I will keep a maintenance record on this BMI'. 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. Important operation and maintenance procedures: — Irnmediately after the bioretention cell is established, the plants will be watered twice weekly if needed until the plants become established (commonly six weeks). — Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell, — Heavy equipment will NEVER be driven over the bioretention cell. — Special care will be taken to prevent sediment from enLering the bioretention cell. — Once a year, a soil test of the soil media will be conducted. After the bioretention cell is established, I will inspect it 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 will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: problems: Potential 1 How I will rernediate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to bioretention cell 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. The inlet device: pipe, 'fhe pipe is clogged (if Utrclog the pipe. Dispose of the stone verge or swale a plicable). sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable), Erosion is occurring in the Regrade the Swale if necessary to Swale (if applicable). sinooth it over and provide erosion control devices such as reinforced turf matting or ripral.) to avoid future problems with erosion. Stone verge is clogged or Remove sediment and clogged covered in sediment (if stone and replace with clean stone. applicable). Form MV401-13iorctenlion O&M-ltev.3 Page 1 of 4 SMP element: Potentialproblems: How I will remediate theproblem: The pretreatment area Flow is bypassing Regrade if necessary to route all pretreatment area and/or flow to the pretreatment area. gullies have formed, Restabilize the area after grading. Sediment has accumulated to Search for the source of the a depth greater than three sediment and remedy the problem if inches. possible. Remove the sediment and restabilize the pretreatment area. 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. The bioretention cell: Best professional practices Prune according to best professional vegetation show that pruning is needed practices. to maintain optimal plant health. Plants aie dead, diseased or Determine the source of the (lying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Providea. one-time fertilizer application to establish the ground cover if a soil test indicates it is necessar , Tree stakes/wires are present Remove tree stake/ wires (which six months after lantin can kill the tree if not removed). The bioretention cell: Mulch is breaking clown or Spot mulch if there are only random soils and mulch has floated away. void areas. Replace whole mulch layer if necessary. Remove the remaining much and replace with triple shredded hard wood mulch at a maximum depth of three inclies. Soils and/or mr►Ich are Determine the extent of the clogging clogged with sediment. - remove and replace either just the top layers or the entire niedin as needed. Dispose of the spoil in an appropriate off -site location. Use triple shredded hard wood mulch at a maximum depth of three inches. Search for the source of the sediment and remedy the problem if possible. An annual soil test shows that Dolomitic lime shall be applied as I)H has dropped or heavy recommended per the soil test and metals have accumulated in toxic soils shall be removed, the soil media. disposed of properly and replaced with new ljjanting media. Form SW401-Biorctention O&M-Rev.3 Page 2 of 4 BMP element: Potentialproblems: How I will remediate the problem: The underdrain system Clogging has occurred. Wash out the underdrain system. if applicable) The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of the sediment off -site. The drop inlet is damaged Repair or replace the drop inlet. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occura-ed at the Quality 401 Oversight Unit at 919- outfet. 733-1786. Form SW401-Bioretention O&M-Rev.3 Page 3 or Permit NumbCI': (to be provided by DIYQ) I acknowledge and agree by nay 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. Project nanae:Ernpire Distributors of North Carolina, Inc. BAII- drainage wr ecr nuinber : Print nanie: Michael A. Kahn 'title: C Address: 13833 Carowinds Blvd., Charlotte, North Carolina 28723 Phone: 704-588 9463 Signature:_ Date: l t 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. Mi �� , a Notary Public for the State of ►' / , County of e lt- b , do hereby certify that hi2 personally appeared helore me this day ofAlovember- and acknowledge the due execution of the forgoing bioretention maintenance recluirenaents. Witness niy hand and official seat, %%% M NU��''% _ My Comm. Expires _ December 20. 2014 _ �'� NgURG G�►.�• �����rrro�tir►►► SEAL My commission expires-/ Form Sw401-Bioretention IR.M-Rev. 2 gage 4 of 4 Permit Number: (to be provided by DWQ) A0*P,A O2 NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM BIORETENTION CELL SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) most be printed, filled out and submitted along with all of the required information. f. PROJECT INFORMATION ' Project name Empire Distributors of North Carolina, Inc. Contact name Jose Restrepo Phone number 254-770-5562 Date August 28, 2013 Drainage area number B II, DE51GN'INFORMATION! Site Characteristics Drainage area 515,780 ft2 Impervious area 270,429 ft2 Percent impervious 52.4% % Design rainfall depth 1.0 inch Peak Flow Calculations is pre/post control of the 1-yr, 24-hr peak flow required? 1-yr, 24-hr runoff depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak control 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 Cell Dimensions Ponding depth of water Ponding depth of water Surface area of the top of the bioretention cell Length: Width: -or- Radius Media and Soils Summary Drawdown time, ponded volume Drawdown time, to 24 inches below surface Drawdown time, total: In -situ soil: Soil permeability Planting media soil: Soil permeability Soil composition % Sand (by volume) % Fines (by volume) % Organic (by volume) Phosphorus Index (P-Index) of media Form SW401-Bioretention-Rev.8 June 25, 2010 N (Y or N) m In/hr ff3lsec ft3lsec ft3lsec 22,431.0 ft3 23,150.0 ft3 OK ft3 —ft3 _ft3 0 it —ft3 9 inches OK 0.75 ft 31,866.0 ft2 OK 340 ft OK 88 ft OK ft 9 hr OK 29 hr OK 38 hr 0,01 in/hr Insufficient. Increase infiltration rate or include underdrains. 1.00 in/hr OK 85% OK 10% OK 5% OK Total: 100% 20 (unitless) OK Parts I and 11, Design Summary, Page 1 of 2 Permit Number: (to be provided by DWQ) Basin Elevations Temporary poo# elevation Type of bioretention cell (answer "Y" to only one of the two following questions): is this a grassed cell? Is this a cell with trees/shrubs? Planting elevation (top of the mulch or grass sod layer) Depth of mulch Bottom of the planting media soil Planting media depth Depth of washed sand below planting media soil Are underdrains being installed? How many clean out pipes are being installed? What factor of safely is used for sizing the underdrains? (See BMP Manual Section 12.3.6) Additional distance between the bottom of the planting media and the bottom of the cell to account for underdrains Bottom of the cell required SHWT elevation Distance from bottom to SHWT Internal Water Storage Zone (IWS) Does the design include IWS Elevation of the top of the upturned elbow Separation of IWS and Surface Planting Plan Number of tree species Number of shrub species Number of herbaceous groundcover specles Additional Information Does volume in excess of the design volume bypass the bioretention cell? Does volume in excess of the design volume flow evenly distributed through a vegetated filter? What is the length of the vegetated filter? Does the design use a level spreader to evenly distribute flow? Is the BMP located at least 30 feet from surface waters (50 feet if SA waters)? Is the BMP located at least 100 feet from water supply wells? Are the vegetated side slopes equal to or less than 3:1? Is the BMP located in a proposed drainage easement with access to a public Right of Way (ROW)? Inlet velocity (from treatment system) Is the area surrounding the cell likely to undergo development in the future? Are the slopes draining to the bioretention cell greater than 20%? Is the drainage area permanently stabilized? Pretreatment Used (Indicate Type Used with an X' in the shaded cell) Gravel and grass (flinches gravel followed by 3-5 ft of grass) Grassed swale Forebay Other 2076.75 fmsl Y (Y or N) OK N (Y or N) 2076 fmsl 0 inches Insufficient mulch depth, unless installing grassed cell. 2074 fmsi 2 ft 0.33 ft Y (Y or N) 32 OK 2 OK 1 ft 2072.67 fmsl 2060 fmsl 12,67 ft OK N (Y or N) fmsl 2076 ft 0 0 Y (Y or N) OK (Y or N) ft (Y or N) Y (Y or N) Ott Y (Y or N) OK Y (Y or N) OK Y (Y or N) OK 9.91 ftlsec Insufficient inlet velocity unless energy dissipating devices are being used. N (Y or N) OK N (Y or N) OK Y (Y or N) OK AIR Form SW401-Bioretention-Rev.8 June 25, 2010 Parts I and II. Design Summary, Page 2 of 2 Permit No: (to be assigned by DWQ) III. 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. Pagel Plan Initials Sheet Mo. No. 1. Plans {1" - 50' or larger} of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Cell dimensions, Pretreatment system, High Flow bypass system, Maintenance access, Recorded drainage easement and public right of way (ROW), Clean out pipe locations, Overflow device, and Boundaries of drainage easement, 2. Plan details (1" = W or larger) for the bioretention cell showing: ., Cell dimensions Pretreatment system, High flow bypass system, Maintenance access, Recorded drainage easement and public right of way (ROW), Design at ultimate build -out, Off -site drainage (if applicable), Clean out pipe locations, Overflow device, and Boundaries of drainage easement. l� Indicate the P-Index between 10 and 30 3. Section view of the bioretention cell (1" = 20' or larger) showing: Side slopes, 3:1 or lower Underdrain system (if applicable), and Bioretention cell layers [ground level and slope, pre-treatment, ponding depth, mulch depth, fill media depth, washed sand, filter fabric (or choking stone if applicable), 457 stone, underdrains (if applicable), SHWT level(s), and overflow structure] 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. All elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in situ soil must include: Soil permeability, Soil composition (% sand, % fines, % organic), and index. d 5. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: A variety of suitable species, Sizes, spacing and locations of plantings, Total quantity of each type of plant specified, A planting detail, The source nursery for the plants, and Fertilizer and watering requirements to establish vegetation. W-30 6. A construction sequence that shows how the bioretention cell will be protected from sediment until the entire drainage area is stabilized WfiL. The supporting calculations (including underdrain calculations, if applicable). '\ !� 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement. 9. A copy of the deed restriction. Form SW401-BioretentiomRev,7 Part III, Page 1 or 1 Permit Ncnnber: (to be proWded by DIYQ) Drainage Area Ni:mber: +A 60 Bioretention Operation and Maintenance Agreement I wiII 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. Important operation and maintenance procedures: — Immediately after the bioretention cell is established, the plants will be watered twice weekly if needed until the plants become established (commonly six weeks). — Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell. --- Heavy equipment will NEVER be driven over the bioretention cell. Special care will be taken to prevent sediment from entering the bioretention cell. Once a year, a soil test of the soil media will be conducted, After the bioretention cell is established, I will inspect it 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 will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired innnediately. BMP element: Potentialproblems: How I will remediate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to bioretention cell 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 ap lication. The inlet device: pipe, The pipe is clogged (if Unclog the pipe. Dispose of the stone verge or swale applicable). sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to Swale (if applicable), smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and clogged covered in sediment (if stone and replace with clean stone. applicable). Forin SW401-Biorctenlion O&M-Rev.3 Page 1 of 4 BMP element: Potentialproblems: How 1 will remediate the problem: The pretreatment area Flow is bypassing; Regrade if necessary to route all pretreatment area and/or flow to the pretreatment area. gullies have formed. Restabilize the area after grading. Sediment has accumulated to Search for the source of the a depth greater than three sediment and remedy the problem if inches. possible. Remove the sediment and restabilize the retrealment area, l;rosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion lLioblenis. Weeds are present. Remove the weeds, preferably by hand. The bioretention cell: Best professional practices Prune according to best professional vegetation show that pruning is needed practices. to maintain optimal plant health, Plants are (lead, diseased or Determine the source of the flying, 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. 'free shakes/wires are present Remove tree stake/wires (which six months after planting. can kill the tree if not removed). The bioretention cell: Mulch is breaking down or Spot nuilch if there are only random soils and mulch has floated away. void areas. Replace whole mulch layer if necessary. Remove the remaining much and replace with triple shredded hard wood mulch at a maximum depth of three inches. Soils and/or mulch are Determine the extent of the clogging Clogged with sediment. - remove and replace either just the top layers or the entire niedia as needed. Dispose of the spoil in an appropriate off -site location. Use triple shredded hard wood mulch at a maximum depth of three inches, Search for the source of the sediment and remedy the problem if possible. An annual soil lesL shows that Dolomitic lime shall be applied as pl-i has dropped or heavy recommended per the soil test and metals have accumulated in toxic soils shall be removed, the soil media. disposed of properly and replaced with new planting media. Dorm SW401-13ioretenlion 0&,M-Rev.3 Page 2 of 4 BMP element: Potentialproblems: How I will remediate theproblem: The underdrain system Clogging has occurred. Wash out the underdrain system. (if a plicable) The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of the sediment off -site. The drop inlet is damaged Repair or replace the drop inlet. The receiving water Erosion or other sighs of Contact the NC Division of Water damage have Occurred at the Quality 4401 Oversight Unit at 919- outlet. 733-1786. Form 5W401-Bioreteiition C)&M-Rcv,3 rage 3 of Permit Number: (to be provided by DJVQ) I acknowledge and agree by my signature below that I atn 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. Project name:Empire Distributors_ of North Carolina, Inc. BkJP drainage wren r amber: Print name: Michael A. Kahn Title: VP / COO Address: 13833 Carowinds BIvd„ Charlotte, North Carolina 28723 Phone: 704-588-9463 Signature:�_� Date: I 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. ke6 ry Public for the State of I//t '`f{!](iQ r Z1,0d, , County off 6r=A1(�'ht)(L G , do hereby certify that _M1 c.-h el A ��hn personally appeared before me this / I clay of h %� , and acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my hand an official seal, ��ga7aa�o++rr,,r M HUB My CCfF R Cxplres m Decembpr20, 2014 C) Win•• '•Z= UBL\G.• BURG Gov �•�*. +err++ooaa�s4�®`a SEAL My commission expires 1a2 •Q , /,/ Form SW401-Woretention I&.M-Rev. 2 Page 4 of 4 ATW A- WOENR North Carolina Department of Environment and Natural Resources Pat McCrory Governor May 20, 2015 Empire Distributors of North Carolina, Inc. Attn: Michael A. Kahn, Vice President 13833 Carowinds Blvd. Charlotte, North Carolina 28723 SUBJECT: NPDES Stormwater Permit Compliance Inspection Empire Distributors of NC Warehouse Facility — Mills River Permit No: SW1131101 High Density Commercial Bio-Retention Project Henderson County Dear Mr. Kahn: Donald R. van der Vaart Secretary This letter is in follow-up to the NPDES Stormwater Permit Compliance Inspection conducted on March 18, 2015, at Empire Distributors of North Carolina in Henderson County. The Engineer's Certification of Completion was received on December 23, 2014. Enclosed is a copy of the Compliance Inspection Report. We appreciate your cooperation in these matters, and if I can be of any further assistance, please contact me or Shawna Riddle at (828) 296- 4500. Sincerely, Laura C. Herbert, P.E. Regional Engineer Land Quality Section Enclosure: Compliance Inspection Report ec: William G. Lapsley, PE; WGLA Engineering PLLC Division of Energy, Mineral, and Land Resources Asheville Regional Office, 2090 US Highway 70, Swannanoa, North Carolina, 28778-8211 Telephone 828-296-4500. Fax 828-299-7043 One http://portal.ncdenr.org/web/Ir/land-qgglity NorthCarollina An Equal Opportunity 1 Affirmative Action Employer Aatlt!'li AY • Compliance Inspection Report Permit: SW1131101 Effective: 12111113 Expiration: 12/11/21 Project: Empire Distributors of North Carolina, Inc - Mills River Owner: Empire Distributors of North Carolina Inc County: Henderson Adress: Broadpointe Dr Region: Asheville City/State/Zip: Mills River NC 28759 Contact Person: Michael A Kahn Title: Directions to Project: Type of Project: State Stormwater - HD - Bioretention Drain Areas: On -Site Representative(s): Related Permits: Inspection Date: 03/18/2015 Entry Time: 12:30PM 4vt—. Primary Inspector: Shawna Riddle Secondary Inspector(s): Lee Hill Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: ® Compliant ❑ Not Compliant Question Areas: ® State Stormwater (See attachment summary) Phone: 704-588-9463 Exit Time: 01:OOPM Phone: Inspection Type: Compliance Evaluation page. 1 Permit: SW1131101 Owner- Project: Empire Distributors of North Carolina Inc Inspection Date: C311812015 Inspection Type Compliance Evaluation Reason for Visit: Routine Inspection Summary: The two bio retention areas have been installed and are functioning properly. The areas are folly vegetated and the certification requirements have been met. SW Measures Yes No NA NE Are the SW measures constructed as per the approved plans? ® ❑ ❑ ❑ Are the inlets located per the approved plans? Rollo Are the outlet structures located per the approved plans? ® ❑ ❑ ❑ Comment: . Built Upon Area Is the site BUA constructed as per the permit and approval plans? Is the drainage area as per the permit and approved plans? Is the BUA (as permitted) graded such that the runoff drains to the system? Comment: Yes No NA NE ®❑❑❑ page: 2 Compliance Inspection Report Permit: SW1131101 Effective:12/11113 Expiration: 12/11/21 Project: Empire Distributors of North Carolina, Inc - Mills River Owner: Empire Distributors of North Carolina Inc County; Henderson Adress: Broadpointe Dr Region: Asheville City/State/Zip: Mills River NC 28759 Contact Person: Michael A Kahn Title: Directions to Project: Type of Project: State Stormwater - HD - Bioretention ❑rain Areas: On -Site Representative(s): Related Permits: Inspection Date; 03/18/2015 Entry Time: 12:30PM Primary Inspector: Shawna Riddle Secondary Inspectorlsj: Lee Hill Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: Compliant ❑ Not Compliant Question Areas: State Stormwater (See attachment summary) Phone: 704-588-9463 Exit Time: 01:OOPM Phone: Inspection Type: Compliance Evaluation page: 1 s permit: SM 131101 Owner - Project: Empire Distributors of North Carolina Inc Inspection Date: 0311812015 Inspection Type Compliance Evaluation Reason for Visit: Routine Inspection Summary: The two bio retention areas have been installed and are functioning properly. The areas are fully vegetated and the certification requirements have been met. SW Measures Yes No NA NE Are the SW measures constructed as per the approved plans? 0 ❑ ❑ ❑ Are the inlets located per the approved plans? 0 ❑ ❑ ❑ Are the outlet structures located per the approved plans? 0 ❑ ❑ ❑ Comment: Built Upon Area Is the site BUA constructed as per the permit and approval plans? Is the drainage area as per the permit and approved plans? Is the BUA (as permitted) graded such that the runoff drains to the system? Comment: Yes No NA NE page: 2