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HomeMy WebLinkAboutSW7091208_CURRENT PERMIT_20091223STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE E'�i%fit YYYYMMDD r0 A NCDENR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor Mr. Bill M. Taylor, President Tandem, Inc. PO Box 709 Elizabeth City, NC 27907 Dear Mr. Taylor: Division of Water Quality Coleen H. Sullins Director Dee Freeman Subject: Stormwater Permit No. SW7091208 Tandem, Inc. High Density Project Pasquotank County The Washington Regional Office received a complete Stormwater Management Permit Application for Tandem, Inc. project on December 16, 2009. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Session Law 2008-211 and Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7091208 dated December 23, 2009, for the construction of the subject project. v2-t 30 0-- 1 This permit shall be effective from the date of issuance until December 23, 2019, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Samir Dumpor, or me at (252) 948-3959. Sincerely, Al Hodge Regional Supervisor Surface Water Protection Section AH/sd: K:\WQS\STORMWATER\PERMIT\SW7091208 cc:. Kim Hamby, Hyman & Robey Pasquotank County Building Inspections Washington Regional Office Central Files North Carolina Division of Water Quality Internet: www.ncwmcrquality.org 943 Washington Square Mall Phone: 252-946-6481 One Washington, NC 27889 FAX 252-946-9215 NorthCaroftna An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper Nat r l& State Stormwater Management Systems Permit No. SW7091208 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 Tandem, Inc. Tandem, Inc. Pasquotank County FOR THE construction, operation and maintenance of two connected infiltration basins in compliance with the provisions of Session Law 2008-211 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 Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until December 23, 2019, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.8 on page 3 of this permit. The stormwater control has been designed to handle the runoff from total of 24,048 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated in Section 1.7 on page 3 of this permit, 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. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. The built -upon areas associated with this project shall be located at lest 50 feet landward of all surface waters. Page 2 of 7 State Stormwater Management Systems Permit No. SW7091208 7 The following design criteria have been permitted for the infiltration basin and must be provided and maintained at design condition: a. Drainage Area, ftz: BASIN 34,553 b. Total Impervious Surfaces, ft2: 24,048 C. Design Storm, inches: 1.5 d. Basin Depth, feet: 2.25 e. Bottom Elevation, FMSy 9.0 f. Bottom Surface Area, ft : 753.66+171.11=925.00 g. Bypass Weir Elevation, FMSY 11.25 h. Permitted Storage Volume, ft : 4,539 i. Type of Soil: Urban j. Expected Infiltration Rate, in/hr: 0.93 k. Seasonal High Water Table, FMSL: 7.0 I. Time to Draw Down, days: 1.21 M. Receiving Stream/River Basin: Knobbs Creek/Pasquotank River basin n. Stream Index Number: 30-3-8 o. Classification of Water Body: "C; Sw" 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. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of 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 bypass structure, infiltration media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. 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 Water Quality 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 inspection. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. If the stormwater system was used as an Erosion Control device, it must be Page 3 of 7 i State Stormwater Management Systems Permit No. SW7091208 restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 8. 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. 9. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 10. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 12. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 13. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS This permit is not transferable to any person or entity 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 the appropriate documentation as listed on page 2 of the form. 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. 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 Page 4 of 7 State Stormwater Management Systems Permit No. SW7091208 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 reissuance or termination does not stay any permit condition. 8. Unless specified elsewhere, permanent seeding requirements for the stormwater controls must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 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 2008-211, 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. This permit shall be effective from the date of issuance until December 23, 2019. Application for permit renewal shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by the processing fee. Permit issued this the 23rd day of December, 2009. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION ol- Coleen H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Permit No. SW7091208 Page 5 of 7 v Ll DWQ USE ONLY Date Received Fee Paid CK4 1 I(, Permit Number 3� � 4eoo r•► 1 08 a a Applica astal SW —1995 Col SW — 2008 El Ph II - Post Construction �n-Coastal (select all i E SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ M t Plan: State of North Carolina INC DENRDepartment of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): 2. Location of Project (street address): 1314 Ehringhaus Street City:Elizabeth City County:Pasquotank Zip:27909 3. Directions to project (from nearest major intersection): From the intersection of US 17 Business (Ehringhaus St.) and NC 344 (Halstead Blvd.) travel east on Ehringhaus St. The site is located 0.33 miles east, on the left, just past the signalized intersection with 4. Latitude:36° 17' 42" N Longitude:76° 14' 24" W of the main entrance to the project. 11. PERMIT INFORMATION: 1. a. Specify whether project is (check one): ®New ❑Modification 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 2. Specify the type of project (check one): []Low Density ®High 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): ❑LAMA Major ®Sedimentation/Erosion Control: _ ❑NPDES Industrial Stormwater ❑404/401 Permit: Proposed Impacts ac of Disturbed Area 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: Fonn SWU-101 Version 07July2009 Page I of 6 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 oroiect): Applicant/Organization:Tandem. Inc. Signing Official & Title:Bill M. Taylor, President b.Contact information for person listed in item la above: Street Address:202 West Main Street City:Elizabeth City State:NC Zip:27909 Mailing Address (if applicable):P.O. Box 709 City:Elizabeth City State:NC Zip:27907 Phone: (252 ) 338-1793 Fax: Email: c. 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 Signing Official & b.Contact information for person listed in item 2a above: Street Address: City: Mailing Address (if City: Phone: ( ) Zip: State: Zip: 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:A. R. Chesson Construction Co. Inc. Signing Official & Title:Zack Mixon b.Contact information for person listed in item 3a above: Mailing Address:P. O. Box 1147 City:Williamston State:NC Zip:27892 Phone: (252 ) 7924486 Fax: (252 ) 792-9090 Em a i I:zack@archesson.coom 4. Local jurisdiction for building permits: Elizabeth City Point of Contact:Stanley Ward, Chief Bldg Inspector Phone #: (252 ) 337-6868 Form SWU-101 Version 07July2009 Page 2 of 6 IV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the storm water runoff will be treated. All runoff from impervious surfaces will be collected using an underground collection system and routed to one of two infiltration ntion basins to store the first 1.5 inches of runoff at 90% TSS removal. 2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved: ❑ Appproval of a Site Specific Development Plan or PUD Approval Date: ElVand Building Permit Issued Date: ❑ Other: Date: b.Identify the regulation(s) the prorct has been designed in accordance with: ❑ Coastal SW —1995 ❑ Ph II — Post Construction 3. Stormwater runoff from this project drains to the Pasquotank River basin. 4. Total Property Area: 0.97 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) = Total Project Area*:0.97 acres Total project area shall be calculated to exclude the followin the normal pool of imppounded structures, the area between the banks of streams and rivers, the area below the Lrmal High Water (NM line or Mean High Water (MHW) line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to calculate overall percent built upon area (BUA). 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 / Total Project Area) X 100 = 60.96 % 9. How many drainage areas does the project have?2 (For high density, count 1 for each proposed engineered stormwater BMP. For low density and other projects, use 1 for the whole property 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. Basin Inforniation Drainage Areal _ rama a re a _ Drainage Area rams a rea Receiving Stream ame o s Creeko s ree Stream Class w w Stream Index Number * ____M_T_T_ I otal Drainage rea s , site Drainage Area s Off -site ramage rea s Proposed Impervious Area (sf) %Impervious Area (total) Im ervious Surface Area Drainage Area _ Drainage Area _ Drainage Area _ Drainage rea site m ngs ots s On -site Streets s On -site Parking s site Sidewalks s Other on -site s umpster uture s site s Existing s ota s * Stream Class and Index Number can be determined at: http://`h2o.enr.state.nc.uslbims/reports&MortsWB.htmi Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, 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 will be replaced by new BUA. 11. How was the off -site impervious area listed above determined? Provide documentation. N/A Form SWU-101 Version 07July2009 Page 3 of 6 ***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 will be replaced by new BUA. 11. How was the off -site impervious area listed above determined? Provide documentation. N/A Projects in Union Countv: 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 stormwater requirements as per NCAC 02B .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 fromhtti)://h2o.enr.state.nc.us/su/bmu forms.htm. VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. A detailed application instruction sheet and BMP checklists are available from http://h2o.enr.state.nc.us/su/bmp forms.htm. 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:/ /h2o.enr.state.nc.us/su/msi maos.htm.) 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 ht!p://h2o.enr.state.nc.us/su/­bmp forms.htm. Ini 'a s 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 VII below) 3. Original of the applicable Supplement Form(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 htip://www.envhelp.org/pages/onestgRexl2ress.html 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/management for 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 1h mile of the site boundary, include the th mile radius on the map. 7. Sealed, signed and dated calculations. 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 landward from the normal pool elevation of impounded structures, the banks of streams or rivers, and the MHW (or NIA of tidal waters. i. Dimensioned property/project boundary with bearings & distances. j. Site Layout with all BUA identified and dimensioned. k. Existing contours, proposed contours, spot elevations, finished floor elevations. 1. Details of roads, drainage features, collection systems, and stormwater control measures. m. 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. Form SWU-101 Version 07July2009 Page 4 of 6 o. Drainage areas delineated (included in the main set of plans, not as a separate document). p. Vegetated buffers (where required). r _ 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"xll" 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 verify the SHWT prior to submittal, (910) 796-7372.1 Un A copy of the most current property deed. Deed book:1036 Page No: 202 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 NCAC 2H.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. htto: / /www.secretary.state.nc.us/­Corporations/CSearch.aspx VIL 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 lot 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 http://h2o.enr.state.nc.us/suibml2 forms.htm#deed restrictions. Download the latest versions for each subm ttal. 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 land, 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. VIII. 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:Sean C. Robey. PE Consulting Firm: Hyman & Robey, PC Mailing Address:P. O. Box 339 City:Camden Phone: (252 ) 335-1888 Email:sean@hyinanrobey.com State:NC Zip:27921 Fax: (252 ) 338-5552 IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this section) I, (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 la) with (print or type name of organization listed in Contact Infornwtion, item lb) 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 07July2009 Page 5 of 6 As the legal property owner 1 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. 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 seal, SEAL My commission expires X. APPLICANT'S CERTIFICATION I, (print or type name of person listed in Contact Information, item 2) Bill Taylor, President, Tandem, Inc. 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 NCAC 2H .1000, SL 2006-246 (Ph. II — Post Construction) or SL 2008-211. Signature: I_ ,IDate: 1 a Notary Public for theStateof �!)Kl I11 %➢ Q� J /YQCounty of _do hereby certify that h personally appeared before me thisI5 day of VFYYIbeg and acl owled a the d e exec 'o the application for a stormwater permit. Witness my hand and official seal, Kelt . Karpf-poyd otary Pub is Pasquotank County NC mvr.- Am271010 SEAL My commission expires Z 7,0 l (sl Form SWU-101 Version 07July2009 Page 6 of 6 Permit No. SW 70912—oB (to be provided by DWO) AGXWA STORMWATER MANAGEMENT PERMIT APPLICATION FORM NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN 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. II. PROJECT INFORMATION Project Name Tandem, Inc. Contact Person Kim Hamby Phone Number 252-338-2913 Date 23-Sep-09 Drainage Area Number 1 - Basin 1 & 2 combined II. DESIGN INFORMATION Site Characteristics / Drainage area 34,553.00 f 2 t/ Impervious area 24,048. 00 flz ✓- Percent impervious 0.70 % Design rainfall depth 1.50 in Peak Flow Calculations 1-yr, 24-hr rainfall depth 3.50 in 1-yr, 24-hr intensity 3.40 in/hr Pre -development 1-yr, 24-hr discharge 1.19 ft3/sec Post -development 1-yr, 24-hr discharge 0.65 ft3/sec j Pre/Post 1-yr, 24-hr peak flow control -0.54 fl�/sec •/ Storage Volume: Non -SA Waters / Minimum design volume required 3,161.91 ft3 1/ Design volume provided 4,538.82 ft3 v OK for non -SA waters Total of 2 Storage Volume: SA Waters Basin Sections 1.5' runoff volume N/A ft3 Pre -development 1-yr, 24-hr runoff volume ft3 Post -development 1-yr, 24-hr runoff volume ft3 Minimum required volume fta Volume provided n3 Soils Report Summary Soil type Urban Infiltration rate 0.93 inmr SHWTelevation 7.00 fmSI Basin Design Parameters Drawdown time 1.21 days ✓ OK Basin side slopes 4.00 :1 OK Basin bottom elevation 9.00 fmsl OK Storage elevation 11.25 fmSI Storage Surface Area 3,374.00 f 2 Top elevation 12.00 fmSI Basin Bottom Dimensions Basin length 43.3 ave. ft Dimensions for Basin width 9.5ave. ft Basin Section #1 Bottom Surface Area 753.00 ft2 Form SW401-Infiltration Basin-Rev.4 Pans I. & 11. Design Summary, Page 1 of 2 Permit No. (to be provided by DWO) Additional Information Maximum runoff to each inlet to the basin? 1.08 ac-in OK Total to two sections Length of vegetative filter for overflow N/A ft OK Distance to structure ft Distance from surface waters 1,600.00 It OK Distance from water supply well(s) N/A ft OK Separation from impervious soil layer N/A It OK Naturally occuring soil above shwt 2.00 ft OK Bottom covered with 4-in of clean sand? Y (Y or N) OK Proposed drainage easement provided? N (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Bypass provided for larger storms? Y (Y or N) OK Pretreatment device provided yes 12" sump in drainage structures Form SW401-Infiltration Basin-Rev.4 Parts I. & II. Design Summary, Page 2 of 2 Permit (to be provided by DWQ) 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 Initials Sheet No. 3 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), - Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. / 1 3.4, & 6 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing: - Bypass structure, - Maintenance access, - Basin bottom dimensions, - Basin cross-section with benchmark for sediment cleanout, - Flow distribution detail for inflow, - Vegetated filter, and - Pretreatment device. IQ�A_ KII 4 3. Section view of the infiltration basin (1" = 20' or larger) showing: - Pretreatment and treatment areas, and '.� 1 VAr l - Inlet and outlet structures. 4. A table attached of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. attached 5. 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 DWO, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. 1, f L 4 6. A construction sequence that shows how the infiltration basin will be protected from sediment until the entire drainage area is stabilized. i�cth attached 7. The supporting calculations. fQr�L attached 6. A copy of the signed and notarized operation and maintenance (0&M) agreement. NIA 9. A copy of the deed restrictions (if required). Form SW401-Infiltration Basin-Rev.4 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1 Permit Number: Sw7og12-Op (to be provided by DWQ) Drainage Area Number: Infiltration Basin Operation and Maintenance Agreement I will keep a maintenance record on this 13MP. 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 maintenance procedures: — The drainage area will be carefully managed to reduce the sediment load to the infiltration basin. . — Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the vegetation. — The vegetation in and around the basin will be maintained at a height of approximately six inches. After the infiltration basin is established, it will be inspected once a quarter 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: Potentialproblem: How I will remediate theproblem: 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 infiltration basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide time and a one-time fertilizer application. The inlet device: pipe or The pipe is clogged (if Unclog the pipe. Dispose of the 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. Form SW401-Infiltration Basin O&M-Rev.3 Page 1 of 3 BMP element: Potentialproblem: How I will remediate theproblem: The forebay Sediment has accumulated Search for the source of the and reduced the depth to 75% sediment and remedy the problem if of the original design depth. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred or Provide additional erosion riprap is displaced. 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 pesticides are used, wipe them on the plants rather than spraying. The main treatment area A visible layer of sediment Search for the source of the has accumulated. sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Replace any media that was removed in the process. Revegetate disturbed areas immediately. Water is standing more than Replace the top few inches of filter 5 days after a storm event. media and see if this corrects the standing water problem. If so, revegetate immediately. If not, consult an appropriate professional for a more extensive repair. Weeds and noxious plants are Remove the plants by hand or by growing in the main wiping them with pesticide (do not treatment area. spray). The embankment Shrubs or trees have started Remove shrubs or trees to grow on the embankment. immediately. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged I Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 919- outlet. 1 733-1786. Form SW401-Infiltration Basin O&M-Rev.3 Page 2 of 3 Permit Number: (to be provided by DWQ) I 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. Project name: Tandem, Inc BMP drainage area number: Print name: Address: 202 W. Main Street 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, i�f� 1 ���0��(� �1 I a Notary Public for the State of h,be4h CA f (l A .t . County of Ff�Ysll -Q(1 do hereby certify that �Rl l i H .�QU l 4 ��i nn personally appeared before me this day of NDV.:knowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, I , - 9 1 /'N A Kerr J. Karpf-poyd otary Pub is Pasquotank County NC Mycommiis mExp es/wn127.2010 SEAL My commission expires 69 I Z T )ZQ10 Form SW401-Infiltration Basin O&M-Rev.3 Page 3 of 3 April 29, 2011 Mr. Samir Dumpor Dept. of Environment and Natural Resources Water Quality Section 943 Washington Square Mall Washington, NC 27889 Subject: Stormwater Management Permit Tandem, Inc. Proj. #090120 Stormwater Permit No. SW7091208 Dear Mr. Dumpor: Enclosed please find the Designer's Certification for the above referenced project. MAY - 5 2011 OVji'`?� VVARO Please note that the two infiltration basins were surveyed and inspected for dimensional and elevation accuracy on April 28, 2011, and found to comply with the design. If you have any questions or require additional information, please do not hesitate to call this office at (252) 335-1888. Sin Sean_C'7�obey, PE Principle Engineer cc: file Mr. Bill Taylor - Tandem, Inc. P. O. Box 339 Camden, North Carolina 27921 (252) 338-2913 w .hymanrobey.com Tandem, Inc. Stormwater Permit No. SW7091 208 Pasquotank County Designer's Certification State Stormwater Management Systems Permit No. SW7091208 �kE R� R V MAY -62011 I, Sean C. Robey as duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically/weekly/ full time) the construction of the project, Tandem, Inc. (Project) for Tandem, Inc . (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 specifications: Signature Registration Number Date cl z9 w 18550 Page 6 of 7 SEAL \\\\1111 III U11111Z \\\ AA CAR01 i��i�� OQ' fessl SEAL 18550 t O C. State Stormwater Management Systems Permit No. SW7091208 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 buiolt- upon area. �j c7 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 11 /ik f3U1t..D/AjgS APE NOT 4. All roof drains are located such that the runoff is directed into the system. �t7 CONST"CTED 5. The outlet/bypass structure elevations are per the approved plan. Ft 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. 6�11. The permitted amounts of surface area and/or volume have been provided. 12. Required drawdown devices are correctly sized per the approved plans. , / 3. All required design depths are provided. N�i� 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. cc: NCDENR-DW4 Washington Regional Office City of Elizabeth City Building Inspections Page 7 of 7