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HomeMy WebLinkAboutSW7121205_CURRENT PERMIT_20200826STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE�(�f% YYYYMMDD k/at4\ d ROY COOPER Governor MICHAEL S. REGAN Secretary BRIAN WRENN Director NORTH CAROLINA Environmental Quality August 26, 2020 TFP, LLC Attention: Mr. Douglas A. Twiddy, Manager P.O. Box 369 Corolla, NC 27927 Subject: Stormwater Permit No. SW7121205 Renewal Corolla Light PUD, Commercial Lot # 2, Phase 13 High Density Stormwater Project Currituck County Dear Mr. Twiddy: The Washington Regional Office received a Stormwater Management Permit Application for renewal for the subject project on July 20, 2020. Staff review of the application has determined that the permit can be reissued. We are forwarding Permit No. SV 7121205 dated August 26, 2020, for the continued operation of the subject project. This permit, upon its effective date, will replace all previous State Stormwater permits for this project. This permit shall be effective from January 17, 2021 until January 16, 2029 and shall be subject to the conditions and limitations as specified therein, and does not supercede any other agency permit that may be required. Please pay special attention to the Operation and Maintenance requirements in this permit. 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 150E 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 me at (252) 948-3923. Sincerely, Roger K. Thorpe Environmental Engineer ® r No, Carolina Deparrntent of Envlrnnrnmral Quality i Division of Energy. Mineral and Land Resources `.Kashingtnn Rrg:onal Office 943 Washington Syuarn Mail . bvn>hinyton. North Carolina 27839 of r o.w�,�.m.,�e�.,�,e.�..m.wm' 25'_946.6 181 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES 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 TFP, LLC Corolla Light PUD, Commercial Lot # 2, Phase 13 Located at 1013 Ocean Trail, Corolla NC Currituck County FOR THE construction, operation and maintenance of four infiltration basins in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Energy, Mineral, and Land Resources (Division) and considered a part of this permit. This permit shall be effective from January 17, 2021 until January 16, 2029, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.7 of this permit. The stormwater control has been designed to handle the runoff from total of 45,449 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated in Section 1.7 of this permit, and as shown on the approved plans. 4. 5. 6. 7. 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 least 50 feet landward of all surface waters. The following design criteria have been permitted for the infiltration basins and must be provided and maintained at design condition: INFILTRATION BASINS #1 #2 a. Drainage Area, ft2: 40,595 15,395 b. Total Impervious Surfaces, ft2: 28,177 10,118 C. Design Storm, inches: 1.5" 1.51, d. Basin Depth, feet: 2.90 2.10 e. Bottom Elevation, FMSL: 7.10 8.40 f. Bottom Surface Area, ft2: 1,413 0.00 g. Bypass Weir Elevation, FMSL: 10.00 11.00 h. Permitted Storage Volume, ft3: 9,690 2,768 i. Type of Soil: CoB - Corolla Fine Sand j. Expected Infiltration Rate, in/hr: 3.00 3.00 k. Seasonal High Water Table, FMSL: 5.00 5.00 I. Time to Draw Down, days: 0.50 0.35 M. Receiving Stream/River Basin: Pasquotank River Currituck Sound n. Stream Index Number: 30-1 o. Classification of Water Body: "SC" INFILTRATION BASINS #3 #4 a. Drainage Area, ft2: 3,237 5,226 b. Total Impervious Surfaces, ft2: 1,697 1,920 C. Design Storm, inches: 1.5" 1.5" d. Basin Depth, feet: 1.33 0.90 e. Bottom Elevation, FMSL: 8.00 7.10 f. Bottom Surface Area, ft2: 113 1,000 g. Bypass Weir Elevation, FMSL: 9.33 8.50 h. Permitted Storage Volume, ft3: 634 1,137 i. Type of Soil: Dt - Duckston Fine Sand j. Expected Infiltration Rate, in/hr: 3.00 3.00 k. Seasonal High Water Table, FMSL: 5.00 5.00 I. Time to Draw Down, days: 0.22 0.15 M. Receiving Stream/River Basin: Pasquotank River Currituck Sound n. Stream Index Number: 30-1 o. Classification of Water Body: "SC" Basin/ Basin/ II. SCHEDULE OF COMPLIANCE The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of 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. 4. Records of maintenance activities must be kept for each permitted SCM. The reports will indicate the date, activity, name of person performing the work and what actions were taken. 5. 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. 6. 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. 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. Access to the stormwater facilities shall be maintained via appropriate easements at all times. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below. a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. 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, 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. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 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. 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 DEQ 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 fling 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 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 January 17, 2021 until January 16, 2029. 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 26 th day of August 2020. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Brian Wrenn, Director Division of Energy, Mineral, and Land Resources By Authority of the Environmental Management Commission Stormwater Permit No. SV 7121205 A Date Received Fee Paid Permit Number i .2- v .:L r, ,J OS . c r SW i/ Z o NC DEQ Division of Energy, Mineral and Land Resources STATE STORMWATER: PERMIT RENEWAL APPLICATION FORM In accordance with 15A NCAC 2H.1045(3), the current permit holder shall renew their high density permit 180 days prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781) Section 60.(c). This application form is for permit renewals only. A. PROJECT INFORMATION 1. State Stormwater Permit Number: SW7121205 2. Project name: Corolla Light [IUD, Commercial Lot #2 Phase 13 1RF.CEIVED JUL G 0 2020 3. Project street address: 1013 Ocean Trl City: Corolla County: Currituck ZIP : 27927 4. What, if any, changes have been made to the project as permitted? If the project has changed from the original approved plans, please complete SWU-101 for a Major Modification or Minor Modification Application form available at: httDs //dea.nc.ciov/about/divisionslenergy- m ineral-land-resou ices/energy-mineral-land-ru I es/stormwater-program/post-construction. B. PERMITTEE INFORMATION If changes to the permittee or project name have been made, please complete either the Permit Update form or the Permit Transfer form available at: http_sI de nc gov/about/divisions/energy-mineral-land- resources/energy-mineral-land-rules/stormwater-program/post-construction. State Stormwater Permits do not automatically transfer with the sale of the property. 1. Current Permit Holder's Company Name/Organization: TFP, LLC 2. Signing Official's Name: Douglas A. Twiddy 3. Signing Official's Title: Manager 4. Mailing Address: PO Box 369 City: Corolla State: NC ZIP: 27927 5. Street Address: 1 142 Ocean Trail City: Corolla State: NC ZIP: 27927 6. Phone: (252) 475-1100 Email: dtwiddy(a)twiddy.com Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018 C. SUBMITTAL REQUIREMENTS Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW). Only applications packages that include all required items listed below will be accepted and reviewed. Initial each item below to indicate that the required information is provided in the application package: MWS 1. A permit application processing fee of $505.00 payable to NCDEQ. MWS 2. One original signed hard copy and one electronic copy of this completed form. The signing official named on this application to represent the current permittee must meet one of the following: a. Corporation — a principle executive officer of at least the level of vice-president; b. Limited Liability Company (LLC) — a manager or company official as those terms are defined in G.S. 57D "North Carolina Limited Liability Company Act," c. Public Entity — a principal executive officer, ranking official, or other duly authorized employee, d. Partnership or limited partnership — the general partner; e. Sole proprietor; or f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity. N/A 3. One hard copy and one electronic copy of recorded documents required by the original permit that have not yet been received by DEMLR, including: deed restrictions, protective covenants, condominium/planned community declaration and easements. If the project has been built, include documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If the project has not been built, include a signed agreement that the final recorded deed restrictions and protective covenants will be submitted at a later date. MWS 4. O&M Agreements, Please select one: ® I have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to keep this on file with the permit; or ❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a copy be sent to me. I agree to keep this on file with the permit. MWS 5. Designer Certifications, Please select one: ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans have been previously provided to the Division; or ® A copy of the certification(s) confirming that the project was built in accordance with the approved plans are enclosed; or ❑ The project has not yet been built. MWS 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a signed, sealed, and dated letter from a licensed professional stating that the SCMs have been inspected, and that they have been built and maintained in accordance with the permit. MWS 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide one hard copy and one electronic copy of documentation from the NC Secretary of State, or other official documentation, which supports the titles and positions held by the persons listed in Section C.2 per 15A NCAC 2H. 1043(3)(b). https://www.sosncgov/online services/search/by title/ Business Registration Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018 D. PERMITTEE'S CERTIFICATION I, Douglas A. Twiddy , the person legally responsible for the permit, certify that I have a copy of the Permit and O&M Agreement on site (or 1 will obtain a copy and it will be kept on site), that I am responsible for the performance of the maintenance procedures, and the site has been and.will be maintained according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs or built -upon area and to submit th roper forms to modify or transfer the permit prior to any changes to the project, SCMs, or ownership. inform�tionprovided on this permit renewal application is, to the best of my knowledge, correct and Som te. / /�f Signature: NOTARIZATION: County of that Dovalas A- Twic this the I �✓I day of execution of the forgoing instrument. Witness my hand and official seal, (Notary Seal) Notary Signature: My commission expires 5/1 r. Z ZO Z Date: 7 — 15 — ZoZO a Notary Public for the State of do hereby certify personally appeared before me 20 2 0 , and acknowledge the due "0 E HOD o '= 'Q�,�OTARY ;ti 130 Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 State Stormwater Management Systems Permit No. SW7121205 Corolla Light PUD, Commercial Lot #2, Phase 13 Stormwater Permit No. SW7121205 Currituck County Designer's Certification I, MtcHAEL- w, s rRADEP>>R , as a duly registered eyAh%MEEP, in the State of North Carolina, having been authorized to observe 0nodica /weekly/ full time) the construction of the project, CoRot.LA t_.tC,taT PuD coMea�(tctAt_ LO-K %d6Z P\kpSE 13 (Project) for TFP, LL_c (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: \���tititNi���/ P Nse; A-C-V"CJWLSt,&E Ytie CE RTIFccP7tor� ct£m-+laLGtA s�\�\ \k CARO�'//' !•� t�GAaDW 6..rTJLtaiN4 zo%3 � SuIL_'t• S�RVEYf �Ka , -,\ t�...... _.° 037813 Date -r(�3jzo2o t(2Wzo Page 6 of 7 State Stormwater Management Systems Permit No. SW7121205 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. Nlta 5. The bypass structure weir elevation is per the approved plan. NIP 6. The bypass structure is located per the approved plans. NIA 7. A Trash Rack is provided on the bypass structure. 8. All slopes are grassed with permanent vegetation. ✓ 9. Vegetated slopes are no steeper than 3:1. ✓ 10. The inlets are located per the approved plans and do not cause short- circuiting of the system. ✓ 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. ✓ 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Regional Office Currituck County Building Inspections MG-rE- ELEVPZ�o �7 S� ptLEAs�n\an S�'oRia�E �Ol.v lNcS WIRE cotyFtptNEt, IJTI LIW P1 fj pz�v��-c s�R�EY �p-rp DP-TE�1N 20�3, RECEIVFD Jill 2, � IM Page 7 of 7 Permit No. W 71ZIzu5 (to be provided by DWO) A02Of W4lf7o Ago/ a STORMWATER MANAGEMENT PERMIT APPLICATION FORM o 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. C PROJECT INFORMATION - ' Project Name Commercial Lot 2 - Phase 13 Contact Person Derek A. Dail, P.E. (Ouible 8 Associates, P.C.) Phone Number 252-261-3300 Date 11/29/2012 Drainage Area Number 1 II. DESIGN INFORMATION ' Site Characteristics Drainage area 40,595.00 fe ✓ Impervious area 28,177.00 ft' ✓ Percent impervious 69.41 / ✓ Design rainfall depth L rid IZ F e'-6 S-W r 1.50 in ✓;3 P51 tit A4 A H A (. F 5 N• 1~ Peak Flow Calculations 1-yr, 24-hr rainfall depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr discharge Post -development 1-yr, 24-hr discharge Pre/Post 1-yr, 24-hr peak flow control Storage Volume: Non -SA Waters Minimum design volume required Design volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff volume Post -development 1-yr, 24-hr runoff volume Minimum required volume Volume provided Soils Report Summary Soil type Infiltration rate SHWT elevation Basin Design Parameters Drawdown time Basin side slopes Basin bottom elevation Storage elevation Storage Surface Area Top elevation Basin Bottom Dimensions Basin length Basin width Bottom Surface Area 3.12 in 0.13 in hr 0.02 ft3/sec 0.09 ft3/sec 0.07 n'/sec 3,425.00 it ✓ 9,690.00 ft3 `1 OK for non -SA waters n3 n' n' ft3 n3 CoB 3.00 5.00 in/hr fmsl 0.50 days 3.00 :1 7.10 fmsl 10.00 fmsl 5,780.00 it 10.00 fmsl 162.60 it 8.69 it 1,413.00 n' OK OK OK DEC -52012 Form SW401-Infiltration Basin-Rev.5 11Apr2011 Pans I. & II. Design Summary, Page 1 of 2 Permit (to be proyded by DWO) Additional Information Maximum runoff to each inlet to the basin? Length of vegetative filter for overflow Distance to structure Distance from surface waters Distance from water supply well(s) Separation from impervious soil layer Naturally occuring soil above shwt Bottom covered with 4-in of clean sand? Proposed drainage easement provided? Capures all runoff at ultimate build -out? Bypass provided for larger storms? Pretreatment device provided 2.72 ac-in 0.00 it 52.00 ft >1000 If >100 it >7 ft 5.00 it y (Y or N) N (Y or N) Y (Y or N) N (Y or N) IN Maximum of 2 acre -inches allowed Filter is too shod, must be > 30-ft OK OK OK OK OK OK Need a recorded drainage easement OK Must provide bypass for larger flows Form SW401-Intiltralion Basin-Rev.5 11Ap2011 Parts I. & II. Design Summary, Page 2 of 2 Permit (to be provided by DWG) 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. Page/ Plan Initials Sheet No. DAD sNr 3 DA.1 aNT3r$ Dha 5uT 8 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. N�A _�(t,lv k"1l. S1�5T'"t Fl Ur`� PA�vATL Pner•eat 2. Partial plan (V = 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. 3. Section view of the infiltration basin (V = 20' or larger) showing: Pretreatment and treatment areas, and Inlet and outlet structures. _b klxl _ t4A2R.WnvE 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. C M-C. 4fi . n nTv; 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The ,a"' kc PotT 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. � A'D MS T 6 6. A construction sequence that shows how the infillration basin will be protected from sediment until the entire drainage area is stabilized. Dad woitATir 7. The supporting calculations. CALL. L AL wcrt=9 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. H/,A _}i' _A 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 w ®�� Permit Noel Z I ZoS (to be prowled by DWO) O= F WArF- STORMWATER MANAGEMENT PERMIT APPLICATION FORM " NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form must be tilled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, tilled out and submitted along with all of the required information. Project Name Contact Person Phone Number Date Drainage Area Number Commercial Lot 2 - Phase 13 ( 01• o l Derek A. Dail. P.E. 1Quible & Associates, P, 11129R012 2 II. DESIGN INFORMATION: Site Characteristics ✓ Drainage area 15,395.00 It3 Impervious area 10,118.00 Its Percent impervious 65.72 Design rainfall depth P t O LH L Pi Ct'IN &To (kN 1.50 in )ksrFr HAH"r. .g 3.37 Peak Flow Calculations 1-yr, 24-hr rainfall depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr discharge Post -development 1-yr, 24-hr discharge Pre/Post 1-yr, 24-hr peak flow control Storage Volume: Non -SA Waters Minimum design volume required Design volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff volume Post -development 1-yr, 24-hr runoff volume Minimum required volume Volume provided Soils Report Summary Soil type Infiltration rate SHWT elevation Basin Design Parameters Drawdown time Basin side slopes Basin bottom elevation Storage elevation Storage Surface Area Top elevation Basin Bottom Dimensions Basin length Basin width Bottom Surface Area 3.12 In 0.13 inlhr 0.01 It3/sec 0.03 ft3lsec 0.02 ft3(sec 1,232.00 ft3 2,768.00 It ✓ OK for non -SA waters ft 3 It ft3 It It CoB 3.00 inlhr 5.00 tmsl 0.35 days OK 3.00 :1 OK 8.40 fmsl OK 10.50 fmsl 2,768.00 ft3 11.00 mist 405.00 It 0.00 It 0.00 ft' \l-SHAAeil 3nsim RECEIVED DEC - 5 2012 Form SW401-Infiltration Basin-Rev.5 11Ap2011 Parts I. & II. Design Summary, Page 1 of 2 Permit No. (to be provided by DWO) Additional Information Maximum runoff to each inlet to the basin? 0.00 ac-in Length of vegetative filter for overflow 0.00 ft Distance to structure 10.00 It Distance from surface waters >1000 It Distance from water supply well(s) >100 It Separation from impervious soil layer >7 It Naturally occuring soil above shwt 3.50 If Bottom covered with 4-in of clean sand? y (Y or N) Proposed drainage easement provided? N (Y or N) Capures all runoff at ultimate build -out? Y (Y or N) Bypass provided for larger storms? N (Y or N) Pretreatment device provided N OK Filter is too short, must be > 30-ft Too close to structure, must be minimum of 15-ft downgradient OK OK OK OK OK Need a recorded drainage easement OK Must provide bypass for larger flows Form SW401-Inl houion Basin-Rev.5 11Ap2011 Parts I. & II. Design Summary, Page 2 of 2 Permit (to be provided by DWO) III-REQUIREV,ITEMSrCHECKLIST'_ Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. PAD sNr 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), N(A -Pft w A'rC SVSrt ti o n! PArvArL - Overflow device, and Prla r• E AT - Boundaries of drainage easement. D kJ sH73 $ 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. D Arts 5 aT 8 3. Section view of the infiltration basin (1" = 20' or larger) showing: Pretreatment and treatment areas, and Inlet and outlet structures. b Itt— t4Akltrqrr6 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. c AL. C. 4's Atij tdAkflutrrv= 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The ,erg S 0 6 was 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. b r+4 NS 7 6 _ 6. A construction sequence that shows how the infitlration basin will be protected from sediment until the entire drainage area is stabilized. DAB ARA/m+r 7. The supporting calculations. (.ALL. _b 0 A,r+ag 8. A copy of the signed and notarized operation and maintenance (O&M) agreement. N�A —ALA 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 No. � 7121 Zu5 (to be provided by DWO) orOF wn re��G STORMWATER MANAGEMENT PERMIT APPLICATION FORM o — NCDENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form most 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. Project Name Contact Person Phone Number Date Drainage Area Number Commercial Lot 2 - Phase 13 Derek A. Dail, P.E. (Ouible It Associates, P.C.) 252-261-3300 II: DESIGN INFORMATION' Site Characteristics Drainage area 3,237.00 h2 Impervious area 1,697.00 it Percent impervious 52.43 % ✓ Design rainfall depth pU 0£NIL INE Q'I STOILY\ 1.50 in i ASIA V1 A 0 A br:3 lit. S2,r Peak Flow Calculations 1-yr, 24-hr rainfall depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr discharge Post -development 1-yr, 24-hr discharge Pre/Post 1-yr, 24-hr peak flow control Storage Volume: Non -SA Waters Minimum design volume required Design volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff volume Post -development 1-yr, 24-hr runoff volume Minimum required volume Volume provided Soils Report Summary 3.12 in 0.13 in/hr 0.00 h'/sec 0.01 ft3/sec 0.01 ft'/sec 210.00 It' '/� 634.00 it' OK for non -SA waters it It' It' ft' RECEIVED Soil type Dt DEC - 5 2012 Infiltration rate 3.00 iBor SHWT elevation 5.00 fmsl Basin Design Parameters D /� Q— /fj ARO Drawdown time 0.22 days OK � V V y Basin side slopes 3.00 :1 OK Basin bottom elevation 8.00 fall OK Storage elevation 9.33 fmsl Storage Surface Area 954.00 h2 Top elevation 9.33 fmsl Basin Bottom Dimensions Basin length 112.90 It Basin width 0.00 It Bottom Sudace Area 0.00 \ it, v — S 1,^<4 . J `p U G S "V\ Form SW401-Infiltration Basin-Rev.5 11Ap2011 Parts I. 811. Design Summary, Page 1 of 2 Permit (to be provided by DWO) Additional Information Maximum runoff to each inlet to the basin? Length of vegetative filter for overflow Distance to structure Distance from surface waters Distance from water supply wells) Separation from impervious soil layer Naturally occuring soil above shwt Bottom covered with 4-in of clean sand? Proposed drainage easement provided? Capures all runoff at ultimate build -out? Bypass provided for larger storms? Pretreatment device provided 0.00 ac-in 0.00 ft 67.00 ft >1000 ft >100 ft >7 ft 3.00 it Y (Y or N) N (Y or N) Y (Y or N) N (Y or N) N OK p Filter is too short, must be> 30-ft H/p- pf�S I)A 0Vti(1 FL 6US OK TO D A L4 OK OK OK OK OK Need a recorded drainage easement N/A OK Off' Must provide bypass for larger flows 401 it 1-E SY 5r Erb OR,4Arr_ PROILAT'y 41A BASw Ov62St7-c0 Foft L A4U Ek STOR^S Form SW401-Infiltration Basin-Rev.5 11 Apr2e11 Parts I. B II. Design Summary, Page 2 of 2 Permit (to be provided by DWQ) 1ll:—REQUIREVITEMSZGHECKLIST� Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. PAD Sto 3 1. Plans (l" - 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. 1V�A _PntvKrC SVSrF_n oP4 PAiVArc 1Nt4PFi4T 2. Partial plan (V = 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. D Ar J 5 UT 8 3. Section view of the infiltration basin (1"= 20' or larger) showing: Pretreatment and treatment areas, and Inlet and outlet structures. b tom_ t4Avw, 6 4. A table of elevations, areas, incremental volumes & accumulated volumes to verily the volume provided. C. AL c. ,h,. a A7ve 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. ThE °'r 5 0.e waT 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. a &D SOT 6 6. A construction sequence that shows how the infitl ration basin will be protected from sediment until the entire drainage area is stabilized. bAo 014anTr+e 7. The supporting calculations. CIALZ. ;te" t� 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. N�A 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 No. 5 ' 71 Z t 1,% (to be provided by 0 ) of V!A r,,1 O' L AwA STORMWATER MANAGEMENT PERMIT APPLICATION FORM o - 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. I. PROJECT INFORMATION Project Name Commercial Lot 2 - Phase 13, Corolla Light PUD Contact Person Derek A. Dail, P.E. (Ouible 8 Associates, P.C.) Phone Number 252.261-3300 Date 11/29/2012 Drainage Area Number 4 II: DESIGN INFORMATION Site Characteristics / Drainage area 5,226.00 ft2 Impervious area 1,920.00 ft2 Percent impervious 36.74 % Design rainfall depth 91 DO NZ REa"I st Ofln 1.50 in Q4319 MAM kb C-S Peak Flow Calculations 1-yr, 24-hr rainfall depth 3.12 in 1-yr, 24-hr Intensity 0.13 in/hr Pre -development 1-yr, 24-hr discharge 0.00 ft�/sec Post -development 1-yr, 24-hr discharge 0.01 ft'/sec Pre/Post 1-yr, 24-hr peak flow control 0.01 ft3/sec Storage Volume: Non -SA Waters Minimum design volume required 251.00 If Design volume provided 1,137.00 ft' OK for non -SA waters Storage Volume: SA Waters 1.5' runoff volume ft3 Pre -development 1-yr, 24-hr runoff volume W Post -development 1-yr, 24-hr runoff volume W Minimum required volume fits Volume provided W Soils Report Summary e^1, Pz/^1i " I V E —" Soil type Dt Fw.`+y h ! ^ Infiltration rate 3.00 in/hr SHWT elevation 5.00 fmsl DEC - 5 2012 Basin Design Parameters Drawdown time 0.15 days OK Basin side slopes 3.00 :1 OK + F,r�1 A '4d9 Basin bottom elevation 7.10 fmsl OK �y _q U6 8�C1 \VO'� AR0 Storage elevation 8.00 fmsl Storage Surface Area 1,527.00 ft 2 Top elevation 8.50 fmsl Basin Bottom Dimensions Basin length 84.00 If Basin width - 12.00 ft Bottom Surface Area 1,000.00 ft� Form SW401-Infiltration Basin-Rev.S l lApr2011 Pans I. 611. Design Summary, Page 1 of 2 Permit (to be provided by DWO) Additional Information Maximum runoff to each inlet to the basin? Length of vegetative filter for overflow Distance to structure Distance from surface waters Distance from water supply wells) Separation from impervious soil layer Naturally occuring soil above shwt Bottom covered with 4-in of clean sand? Proposed drainage easement provided? Capures all runoff at ultimate build -out? Bypass provided for larger storms? Pretreatment device provided 0.00 ac-in 0.00 If 117.00 ft >1000 ft >100 it >7 it 3.00 If Y (Y or N) N (Y or N) Y (Y or N) N (Y or N) IN OK Filter is too short, must be > 30-ft 16414 OK OK OK OK OK OK Need a recorded drainage easement OK Must provide bypass for larger flows OV60.51 tc:.1 11 AS I" u/a PntJA7E 64STtr, aN �IIXWATC PROA61%" Form SW401-Infiltration Basin-Rev.5 11Ap2011 Parts I. & If Design Summary, Page 2 of 2 • Permit No. 1 (to be provided by DWO) IIII?. REQUIRED]ITEMSLCHECK(ISTT ___ Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. DAD aHT 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. 41A _PntvK1C SJST6rt or! PArvaTt PgePeiiT D ka sAT 3 { % 2. Partial plan (V = 30' or larger) and details for the infiltration basin showing: Bypass structure, Maintenance access, Basin bottom dimensions, Basin cross-section with benchmark for sediment cleanoul, Flow distribution detail for inflow, Vegetated filter, and Pretreatment device. D h ts 5 t1T 8 3. Section view of the infiltration basin (1"= 20' or larger) showing: - Pretreatment and treatment areas, and - Inlet and outlet structures. _4ht. 14AtRrtT,E 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. C. C. �.tdAill.107 F 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The .;o5 0.e waT 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. b AD NS S 6 6. A construction sequence that shows how the infitlration basin will be protected from sediment until the entire drainage area is stabilized. DAo M MrtLt 7. The supporting calculations. CAr.Z. _b " ;W'r g 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. NIA _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 Sw-t Iz1Zos (to be provided b) DIVQ) Drainage Area Number: 1. 2 1'31 Infiltration Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. 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. DECEIVED DEC -52012 Form SW401-Infiltration Basin O&M-Rev3 Page I of 3 D tl Q- Y ARO BMP element: The main treatment area The embankment The outlet device The receiving water em: Sediment has accumulated and reduced the depth to 759% of the original design depth. Erosion has occurred or riprap is displaced. Weeds are present. A visible layer of sediment has accumulated. Water is standing more than 5 days after a storm event. Weeds and noxious plants are growing in the main treatment area. Shrubs or trees have started to grow on the embankment. An armual inspection by an appropriate professional shows that the embankment needs repair. The outlet device is damagec Erosion or other signs of damage have occurred at the outlet. How I will remediate the problem: Search for the source of the 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. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather than Search for the source of the 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 Replace the top few inches of filter 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. Remove the plants by hand or by wiping them with pesticide (do not Remove shrubs or trees Make all needed repairs. Clean out the outlet device. Dispose of the sediment off -site. Repair or replace the outlet device. Contact the NC Division of Water Quality 401 Oversight Unit at 919- 733-1786. Form SW401-Infiltration Basin O&M-Rev3 Page 2 of 3 Permit Number: (to be provided by DIVQ) 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:Commeral Lot 2 - Phase 13, Corolla Light PUD BMP drainage area number: Print name:Douglas A. Twiddy; TFP LLC Title:Manaeer of TFP, LLC Date: l (�3D �t z, Note: The legally responsible party should not he a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. 1, Q AS+j-n9�, it Notary Public for the State of County of AR E do hereby certify that Qt��� DS i�• -Fwl d d � personally appeared before me this '(1 day of J fm }, and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, CHRISTINE A BOYLE NOTARY PUBLIC Dare Counly North Carolina My Commission Expires January 12, 2011 SEAL My commission expi a4c Form SW401-Infiltration Basin O&M-Rev.-1 Page 3 of 3