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SW4090401_CURRENT PERMIT_20110922
STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW��Q(�B( DOC TYPE CURRENT PERMIT C. ❑ APPROVED PLANS ❑ HISTORICAL FILE DOC DATE YYYYMMDD �o NCDENR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor Division of Water Quality Colleen H. Sullins Director September 20, 2011 Mr. Barry Siegal Robinhood Court Apartment Homes, LLC PO Box 8306 Greensboro, NC 27419 Subject: Stormwater Permit No. SW4090401 - Modification Robinhood Court Apartment Homes High Density Bio-Retention, Infiltration Forsyth County Dear Mr. Siegal: Dee Freeman Secretary RECE� IVE —` WC. Oept. Of F,NR SEP z 2 2011 Winston-Salem Regional Office Trench, & Wet Pond Project The Stormwater Permitting Unit received a complete Stormwater Management Permit Modification Application for Robinhood Court Apartment Homes on September 14, 2011. 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 modified Permit No. SW4090401, dated September 20, 2011, for the construction, operation and maintenance of the subject project and the stormwater BMPs. This modified permit includes revising the BMP for DA#1 from a bioretention cell into a wet detention basin; and does not change the overall bua or the other previously approved BMPs. This permit shall be effective from the date of issuance until April 14, 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 inspection 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 150E of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. This project will be kept on file at the Winston-Salem Regional Office. If you have any questions, or need additional information concerning this matter, please contact Robert Patterson at (919) 807-6375. Sincerely, A� 0 �. for Coleen H. Sullins Wetlands and Slcrmwaler Branch One 1517 Mail Service Center, R& eigh, North Carolina 27699 1617 Noz-thCarolina l.icalion: 512 N. Salisbury Sit Raleigh, North Carolina 27304 n nI Phone: W-807-63001 FAX: 919,807 ^1941 Customer S�!rvice: 1-P77-623-6748 Nata� oall]/ I ,ernet: wmv.ncwaterquaky org a/ An Equal Opportunity 1 Affirnra!ive Action En,aloyer i IddamblZ Mr. Barry Siegal SW4090401 MOD — Robinhood Court Apartment Humes September 20, 2011 ec: Michael Westcott, PE — Westcott, Small & Assoc., PLLC Sue Homewood — WSRO-DWQ cc: SW4090401 Permit File Page 2 of 2 State Stormwater Permit Permit No. SW4090401 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 Robinhood Court Apartment Homes, LLC Robinhood Court Apartment Homes Robinhood Rd. (-1,500 ft. east of Meadowlark Dr.), Winston-Salem, Forsyth County FOR THE construction, operation and maintenance of one (1) wet detention basin, three (3) bioretention cells, and three (3) infiltration trenches 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 Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until April 14, 2019, 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 Sections 1.8, 1.9, and 1.10 of this permit. The stormwater control has been designed to handle the runoff from 394,181 square feet of impervious area. 3. Each BMP must be operated with 30 foot vegetated filter, with the exception of wet pond #1. 4. The tract will be limited to the amount of built -upon area as indicated in Sections 1.8, 1.9, and 1.10 of this permit, and per the application documents and as shown on the approved plans. 5. 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. Page I of 8 State Stormwater Permit Permit No. SW4090401 M 7 91 1.1 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 proJ.ect shall be located at least 30 feet landward of all perennial and intermittent surface waters. The following design criteria have been provided in the bioretention cells and must be maintained at design condition: Cell #2 Cell # Cell #4 a. Drainage Area, 2: 127,195 41,818 24,939 Onsite, ft : 127,195 41,818, 24,939 Offsite, ft2: 0 0 0 b. Total Imperviou.9 Surfaces, ft2: 47,480 16,117 7,619 Onsite, ft : 47,480 16,117 7,619 Offsite, ft2: 0 0 0 C. Design Storm, inches: 1.0 1.0 1.0 d. Max. Ponded Depth, inches: 10 9 9 e. Seasonal High Water Table, fmsl: 805 824.5 784.5 f. Planting Media Depth, feet: 2.0 2.0 2.0 g. Cell Dimensions,. feet: 240x45 120x28 37x20 h. Planting Elevation, fmsl- 812.17 832.17 792.17 i. Bottom Surface Area, ft�: 6,985 3,134 1,090 j. Permitted Storage Volume, ft3: 5,821 2,351 818 k. Bypass / Storage Elevation, fmsl: 812.92 832.92 793.0 I. Predevelopment 1 year 24 hour: 0.21 cfs 0.07 cfs 0.03 cfs M. Treatment Volume Drawdown: 0.16 cfs �0.07 cfs 0.02 cfs n. Drawdown Time, hours: 34 34 33 o. Underdrain Diameter, inches: 6 6 6 P. Total number of plants provided: grass grass grass q. Receiving Stream/River Basin. UT to Muddy Creek 1 Yadkin Pee -Dee r. Stream Index Number: 12-94-(0.5) S. Classification of Water Body: it C " The following design criteria have been provided in the infiltration trenches and must be maintained at design condition: Trench#1 Trench#2 Trench#3 a. Drainage Area, Acres: 161,608 129,808 41,818 Onsite, ft : 161,608 129,808 41,818 Offsite, ft2: 0 0 0 b. Total Impervioug Surfaces, ft2: 84,942 63,162 16,952 Onsite, ft : 84,942 63,162 16,952 Offsite, ft2: 0 0 0 C. Design -Storm, inches: 1.0 1.0 1.0 d. Trench Length ft: 448 464 29 e. Trench Width, ft: 8 6 25 f. Trench Height, ft: 5 5 5 g. Bottom Elevation, fmsl: 796 810 780.5 h. Bypass Weir Elevation, fmsl: 801 815 785.5 i. Permitted Storage Volume, ft3: 7,168 5,568 1,450 j. Type of Soil: sandy loam sandy loam loamy sand k. Expected Infiltration Rate, inlhr: 0.64 0.64 0.84 I. Seasonal High Water Table, fmsl: 794 808 778.5 M. Time to Draw Down, days: 4.5 4.5 4.5 n. Receiving Stream/River Basin: UT to Muddy Creek 1 Yadk n Pee -Dee o. Stream Index Number: 12-94-(0:5) P. Classification of Water Body: " C " Page 2 of 8 State Stormwater Permit Permit No. SVV4090401 10. The following design elements have been permitted for this wet detention pond stormwater facility, and must be provided in the system at all times. a. Drainage Arga, acres: Onsite, ft Offsite, ft2: b. Total Impervious Surfaces, ft2: Buildings, ft Roads/Parking, ft2: Other, ft2. Offsite; ft c. Average Pond Design Depth, feet: d. TSS removal efficiency: e. Design Storm: f. Permanent Pool Elevation, FMS: g. Permitted Surface Area @PP ft : h. Permitted Storage Volume, ft,: i. Storage Elevation, FMSL: j. Predevelopment 1 year 24 hour: k. Post development 1 year 24 hour: I. Controlling Orifice: m. Permanent Pool Volume, ft3: n. Forebay Volume, ft3: o. Maximum Fountain Horsepower: p. Receiving Stream 1 River Basin: q. Stream Index Number: r. Classification of Water Body: II. SCHEDULE OF COMPLIANCE 8.29 361,112 0 165,528 43,124 81,600 40,804 0 3.2 90% 1.0 773.50 10,290 16,858 at temporary pool 774.84 0.34 0.34 1.50" O pipe 30,266 5,630 118 HP UT to Muddy Creek 1 Yadkin Pee -Dee 12-94-(0.5) 01C11 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, vegetated filter strip, 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. Page 3 of 8 State Stormwater Permit Permit No. SW4090401 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. 6. The facilities shall be constructed as shown on the approved plans. 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. Page 4 of 8 State Stormwater Permit Permit No. SW4090401 14. Decorative spray fountains will be allowed in the wet pond, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. c. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for the fountain's pump is based on the permanent pool volume. The maximum pump power for a fountain in this pond is 1/8 HP. III. 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 Water Quality, accompanied by the supporting 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 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 Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 4. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which 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. Page 5 of 8 State Stormwater Permit Permit No. SW4090401 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 20t' day of September, 2011. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Loieen m. 5umns; uirector Division of Water Quality By Authority of the Environmental Management Commission Page 6 of 8 State Stormwater Permit Permit No. SW4090401 Ribinhood Court Apartment Homes Stormwater Permit No. SW4090401 Forsyth County Designer's Certification I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project 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 7 of 8 State Stormwater Permit Permit No. SVV4090401 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 vegetated shelf, underdrains, vegetative cover, and a forebay. 15. The required system dimensions are provided per the approved plans. Submit to: NCDENR-DWQ Winston-Salem Regional Office 585 Waughtown Street Winston-Salem, NC 27107 Page 8 of 8 i r 24-r-rA'.e-C a,/ DWQ USE ONLY Dolte Received Fee Paid Permit Number 17-12,1 Ma SOS• 00 .sl'✓`f0 90`f0/ 'zfa Appliofible pules: ❑ Coastal SW 7-1995 ❑ Coastal SW - 2008 eTh H - Post Construction (select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan ❑ Other WQ Mgmt Plan: irtoD State of North Carolina Depwtment of Environment and Natural Resources Division of Watei Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original o L GENERAL INFORMATION p a, 1. Project Name (subdivision, facility, or establishment name - should be consistent with project name specifications, letters, operation and maintenance agreements, etc.): cJ 2- Location of Project (street address): 1840 lfniahts Haven Court City:Winston-Salem County:Forsyth Zip:27106 3. Directions to project (from nearest major intersection): From the intersection of Robinhood Road and Fleetwood Circle take Robinhood Road 630 LF We--.L The site is on your left.-- 4. Latitude:36* 7' 14" N Longitude:80* 21' 58" W of the main entrance to the project. II.. PERMIT INFORMAI ION: L a. Specify whether project is (check one): QNew ®Modification b.If this application is being submitted as the result of a modification to an existing permit, list the existing permit numberSW 4090401 , its issue date (if known)4/ 14/09 , and the status of construction: ❑Not Started ®Partially Completed" ❑ Completed* *prornde 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 retwned 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-. ac of Disturbed Area []NPDES Industrial Stormwater E)404/401 Permit: Proposed Impacts 110_LF_Permanent 97 L.F Temporazy_impacts to unnamed tributary to M_u_ddy_Creek 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 permlt:401[Robinhood Manor Apartment Homess/Nov.11,2008 4044/ Robinhood Apartment homes/7/23/2008 Erosion Control/Robinhood Manor Apartment Homes/7/18/2008 t a 96 Q1• CONIACIINFORMAIION l a.Prini Applicant / Signing Official's name and title (specifically the developer, property ownez, lessee, designated government official, individual, etc who owns the ro•ect): Applicant/OrganizatiomRobinhood Court Apartment homes , . i-- t- G Signing Official & Title. Barry Siegal b Contact information for person listed in item la above: , Street Address:: 3411-D West Wendover Ave, Suite D City:Greensboro State:NC Zip: " 2 7 4 0 7 Mailing Address (if applicable):P.O. Sox M City:Greensboro _ State:NC Zip:2741.9 Phone. W6 ) 292-9010 _ Fax: (336 } 632-0207 Bmail:bcshol aol_com c. Please check the appropriate box. The applicant listed above is: ® the property owner (Skip to Contact Wormation, 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 Infoimation, item 2a and 2b below) ❑ Developer* (Complete Contact Information, item 2a and 2b below) 2. a. Print Propel ty Owner's name and title below, if you are the lessee, purchaser or developer. (Ibis is the person who owns the property that the project is located on): Property Owner/Organization: Signing Official & Title: b..Contact information for person listed in item 2a above: Street Address: City: State: Zip: Mailing Address (if applicable): City: State: Zip. --- Phone: l } Fax: ( } Email: 3. a, (Optional) Print the narne and title of another contact such as the projeces construction supervisor or other person who can answer questions about the project Other Contact Person/Oiganization:Michael Wf,5Uga/Westcott, Small & Associates. PLLC--___ Signing Official & Iitle:Michael Westcott/ Principal b.Contact information for person listed in item 3a above: Mailing Addiess:l25 S. Elm Street Suite 606 _ r City:Greemboro State:NC Zip:27401 Phone: (336 ) 310-1480 Fax: Email:mwestcott@wsaaeng.com 4. Local jurisdiction for building permits: Winston-Salem Point of Contact:Charles Norton IV., PROJECT INFORMATION Phone #: (336 ) 727-8000 1. In the space provided below, briefly summarize how the starmwater runoff will be treated.. Stormwater management is accomplished through dividing the large site into sub basins. the Site is treated by6 BMPs. Three are infiltration trenches, two biocells and a wet pond. 2. a. If claiming vested rights, identify the suppor ting documents provided and the date they were approved: Approval of a Site Specific Development Plan or PUD Approval Date: Valid Building Permit Issued Date: ❑ Other: Date: b., If claiming vested rights, identify the regulation(s) the project has been designed in accordance with: ❑ Coastal SW -1995 ❑ Ph 11- Post Constr uction 3. Starmwater runoff from this project drains to the Yadkin PeeDee River basin 4. Total Property Area: 28.16 acres 5. Total Coastal Wetlands Area: _acres 6. Iotai Surface Water Area: 28.1E acres 7. Iota] Property Area (4) -Total Coastal Wetlands Area (5) -Total Surface Water Area (6) - Iota] Project Area':28.16 acres Total project area shall be calculated to exclude the following: the normal pool of impounded structures, the area between the banks of streams and rivers, the area below the Normal Hi h Water (?04M line or Merin High Water (MHW) line, and coastal wetlands landward from the NHW for MHW line. The resultant project area is used to calculate overall percent built upon area (BUA). Non -coastal wetlands landward of the NHW (or-hC4W line may be included in the total project area_ 8. Project percent of impervious area: (Iota] Impervious Area / Iotal Project Area) x 100 — 33.84 % 9. How many drainage areas does the project have?6 (For high density, count 1 for each proposed engineered stormwater BMP For low density and other projects, use T for the whole property area) 10 Complete the following information foi 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 Information Drainage Area 1 Drainage Area 2 Drainage Area 3 Drainage Area 4 Receiving Stream Name UT to Muddy^ Creek UT to Muddy Creek UT to Muddy Creek UT to Muddy Creek Stream Class C C C C Stream Index Number * 12-94-(0.5) 12-94-(0.5) 12-94-(0.5) 12-94-(0.5) Total Drainage Area (so 361,112 127,195 41,817 129,808 On -site Drainage Area (so 361,112 127,195 41,817 129,808 Off -site Drainage Area (so 0 0 0 0 Proposed Impervious Area** (so 165,528 47,480 16,117 63,162 % Impervious Area** total 45.84 37.33 38.54 48.66 Impervious— Surface Area Draina e Area 1 Draina e Area 2 Draina e Area 3 Draina e Area 4 On -site Buildings/Lots (sf) 43,124 26,739 6,634 35,858 On -site Streets (so' 0 0 0 0 On -site Parking (so 81,600 13,592 7,908 19,354 On -site Sidewalks (so 40,804 7,149 1,575 7,950 Other on -site (so 0 0 0 0 Future (so 0 0 0 0 Off -site (sf) 0 0 0 0 Existing BUA*** (so 0 0 0 0 Total (so: 165,528 47,480 16,117 63,162 * Stream Class and Index Number can be determined at: Intl).,&ortal.ticdettr.or vei)At)q[ps/csit/classifcatiol►s ttupervious area is defttted as the built upon area including, but not limited to, buildings, roads, parking areas, sidez►calks, 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 Proiects in Union County: Contact DWQ CentralOfcestcffto check ifthe 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 from http://portal.ncdenr.org/web/wq/ws/su/bnip-rnanua_1. 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 htM.Z/portal.ncdenr.org/web/wq/ws/su/statesw/forms does. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map at http://portal.ncdenr.org/web/wq/ws/su/mans.) Please indicate that the following required information have been provided_ by initialing in the space provided for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions for each submitted application package from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms does. Initials 1. Original and one copy of the Stormwater Management Permit Application Form. 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants Form. (if required as per Part V11 below) 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 NCOENR. (For an Express review, refer to http://www.etivhelI2.org/pages/onestopexpress.htmi 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.) Form SWU-101 Version 07Jun2010 Page 4 of 7 Basin Information Drainage Area 5 Drainage Area 6 Drainage Area 7 Drainage Area _ Receiving Stream Name UT to Muddy Creek UT to Muddy Creek U'l' to Muddy Creek Stream Class * C C C Stream Index Number * 12-94-(0.5) 12-94-(0.5) 12-94-(0.5) Total Drainage Area (sf) 161,607 41,817 24,939 On -site Drainage Area (so 161,607 41,817 24,939 Off -site Drainage Area (so 0 0 0 Proposed Impervious Area** s 84,942 16,952 7,619 % Impervious Area'* total 52.56 40.54 30.55 Impervious— Surface Area Drainage Area 5 Drainage Area 6 Drainage Area 7 Drainage Area On -site Buildings/Lots (so 23,818 9,004 0 On -site Streets (so 0 0 0 On -site Parking (so 48,846 6,177 0 On -site Sidewalks (so 12,278 1,771 419 Other on -site (so 0 0 7200 Future (so 0 0 0 Off -site (so 0 0 0 Existing BUA*** (sf} 0 0 0 Total (sf): 84,942 16,952 7,619 * Stream Class and Index Number can be determined at: Irtt is 7ortal.rrcdertr.or veb v s csir classi rcations " 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 reproved andwltich will be replaced by new BUA. 11. How was the off -site impervious area listed above determined? Provide documentation. NIA Projects in Union County: Contact DWQ Central Office staff to check if the project is located k0thin a Threatened & Endangered Species watershed that rnav 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 from http://portal.ncdenr.org/web/wq/ws/su/bmp-manual. Vl. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. A detailed application instruction sheet and BMP checklists are available from http//portal.ncdenr.org/web/wq/ws/su/statesw/forms does. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map at http://portal.iicdeiir.org/webZwqLwsZsu/"niaps.) Please indicate that the following required information have been provided by initialing in the space provided for each item. All original documents MUSTbe signed and initialed in blue ink. Download the Iatest versions for each submitted application package from htt ortal.ncdenr.or T web wq Z ws/su statesw forms does. Initials 1. Original and one copy of the Stormwater Management Permit Application Form. 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants Form. (if required as per Part V11 below) 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 http://www.envhelp.org/pages/onestopexpress.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.) Form SWU-101 Version 07Jun2010 Page 4 of 7 5, A detailed narrative (one to two pages) describing the stormwater treatment/managementfor ____ the project This is required in addition to the brief summary provided in the Project Informatiom item 1. 6. A USGS map identifying the site location. If the receiving stream is repox bed as class SA or the _ receiving stream drains to class SA waters within 1h mile of the site boundary, include the rh mile radius on the map. 7_ Sealed, signed and dated calculations. _ 8. Two sets of plans folded to 8.5" x 14" (scaled, signed, & dated), including: _ a Development/Project name. b. Engineex and firm_ c. Location map with named streets and NCSR numbers. & Legend.. e. North arrow, f. Scale. g. Revision number and dates h- Identify all sur face 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 fines. • Delineate the vegetated buffer landward hom the normal pool elevation of impounded structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters. i. Dimensioned property/project boundary with .bear ings & distances. j Site Layout with all BUA identified and dimensioned. k. Existing contours, proposed contnws, spot elevations, finished floor elevations- L 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. o. Drainage areas delineated (included in the main set of plans, not as a separate document). p. Vegetated buffers (where required) 9_ Copy of any applicable soils report with the associabed SI-1WT elevations (Please identify elevations in addition to depths) as well as a map of the box ing locations with the existing elevations and boring logs. Include an 8.5"xl1" copy of the NRCS County Soils map with the project area clearly delineated. Fox projects with infiltration BWs, the report should also include the soil type, expected infiltration rate, and the method of determining the infiltration rate. (hdilhation Devices submitted to MM Schedule a site visit for DWQ to verify the SHWT prior to submittal, (970) 796-737$) 10. A copy of the most current property deed. Deed book: Page No: 11 For cot poiations 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, Za, and/or 3a per NCAC 2H.1.003(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. hU: / /www.secretary.state.nc_us/Corporations/CSearch.aspx V11. DEED RESTR14MONS AND PROTECTIVE COVENANTS For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective covenants are required to be recoided 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 hqp:/ /poitaLncdenr.oig/web/wq/ws/su/statesw/forms docs_ Download the latest versions for each submittal In the instances where the applicant is different than the property owner, it is the responsibility of the propexty owner to sign the deed restrictions and protective covenants form while the applicant is responsible fox ensux ing that the deed restrictions are recorded.. By the notarized signature(s) below, the permit holdex(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 Iot. 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 EngineetAUchael B. Westcott Consulting Firm: WestcottSmall & Assoc. PLLC Mailing Address:125 S. Elm Street, Suite 606 _ City:Greensboro State:NC Zip:27401 Phone: (336 ) 310-1480 Email:mwestcottO wsaaeng.coat Fax: ( ) IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete tlris section) 1, (print or type name of person listed in Contact Information, item 2a) _ _ , certify that I own the property identified in this permit application, and thus gave permission to (print or type name of person listed in Contact Information, item Ia) — with (print or type name of organization listed in Contact Information, item Ia) 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 fox the operation and maintenance of the stormwater system. As the legal proper ty owner I acknowledge, under stand, 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 far compliance with the DWQ Stnr rnwater 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 1 will be operating a stormwatex 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. Date: I, 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 i e. Y, APPLICANT'S CERMICAI ION 1, (print or type name of person Iisted in Contact Information, item 1a)1 Ja r � S; P ctl certify that the information included on this permit application forth is, tDkhe 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 necotded, and a proposed project complies with the requirements of the applicable stormwatet rules under 15A NC 000, SL 2006-246 (Ph II -. Post Construction) or SL 2008-211. Signahue_ I, Lc L l— _ __, a Nota Public for the State of I G + L - , County of ZT do hereby certify that ! �r gL._._....� personally appeared before m flits day of �0 OfU , and a ledge the d utio application for a stotmwatei permit Witness my hand and official seal, •�...-- --•a. �. r M PO av4k . . SEAL My commission expires /C� +Q (J `o*7 // m � � r. a C Q K: ��� ,,rv�.... Permit Number: (Io he provided by DWQ) Drainage Area Number: I Wet Detention Basin Operation and Maintenance Agreement t 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 13MP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system check one): ❑ does does not This system (c eck one): ❑ does does not incorporate a vegetated filter at the outlet. incorporate pretreatment other than a forebay. Important maintenance procedures: - Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). - No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. - Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. - If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate the roblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application, Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. U-__.... VII/A"I Iir... f%0.1,A n.... e i cn Permit Number: (to he provided by DWQ) Drainage Area Number: BMP element: Potentialproblem:.. How 1 will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to Swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. 17-rosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessaa. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form 5W401-Wet Detention Basin O&M-Rev.4 Page 2 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 4.40 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads _4.40 feet in the forebay, the sediment shall be removed. ^ Sediment Removal Bottom BASIN DIAGRAM ill in the blanks) 769.10 1 Pe lanenl ------------------ Volume i 768.00 -ft Min. Sediment Storage Permanent Pool Elevation 773.50 Pool `- - Sediment Removal Elevation 769.10---- Volume Bottom Elevation 768.00 j 1-ft Storage F'OREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4 Permit Number: (to be provided b, 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 orprior to any changes to the system or responsible party. Projeci name: Rob i^1 4aJ BMP drainage area number: Print name: 13 `S 1 G4 L In Title: ! ► ►?rt .p /' /!"f -e—., P�Aejb/ Address: xg ci c �34 6 C�;e e ,-J d�o, AJ C � 7 Phone: _3 3 b "- 2-7 � / O / 0 , Signature: /II (�_//0 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, U d +`t , a Notary Public for the State of o4, ALL, , County of t , do hereby certify that r r i.Q personally appeared before me this ` day of rl , mow, and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, G�YN I►0�`., N OTAft'' . P B LAB-, .. N S IAA L My commission expires Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 ' r• � ` x 1r u+ • Permit No. S LA/ '�67 a LrO/ kc7� (to be provided by DWQ) AEOMA �F WA7�9O G y NCDENR p Y STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This farm must be filled out, printed and submitted. The Required Items Checklist (Part Ill) must be printed, filled out and submitted Mong with all of the required information. 11 PROJECT�INFORMATION Project name RoNnhood Manor Apartment Homes Contact person Michael Westcott Phone number 336-310-1480 Date 7/28/2011 Drainage area number Wet pond #1 11:;DESIGN .tNFORMATION �"" ; Y7111— _ �3 Site Characteristics Drainage area 361,112 ft� Imperious area, post-tievelopment 165,528 fig % imperious 45.84 % Design rainfall depth 1.0 in Storage Volume: Non -SA Waters 1'� Z 3 p 2&6 — Minimum volume required 13,920 ft3 OK vrvd)l GI y.S� Volume provided �i;t24 .,a I( $St�c_i� (TPY�,�) OK, volume provided is equal to or in excess of volume required. Storage Volume: SA Waters 1.5" runoff volume ft3 Pre -development 1-yr, 24-hr runoff It Post -development 1-yr, 24-hr runoff 03 Minimum volume required ft3 Volume provided ft3 Peak Flow Calculations Is the pre/post control of the lyr 24hr storm peak flow required? Y (Y or N) 1-yr, 24-hr rainfall depth 2.8 in Rational C, pre -development 0.35 (unitiess) Rational C. post -development 0.85 (unitless) Rainfall intensity: 1-yr, 24-hr storm 0.19 inlhr OK Pre -development 1-yr, 24-hr peak flow 0.34 fl3isec Post -development 1-yr, 24-hr peak flow 0.34 fOlsec Pre/Post 1-yr, 24-hr peak flow control 0.00 ft'tsec Elevations Temporary pool elevation 774.84 fmsl Permanent pool elevation 773.50 fmsl SHWT elevation (approx. at the perm. pool elevation) 768.00 fmsl Top of 1 Oft vegetated sheaf elevation 774.00 fmsl Bottom of 1 Oft vegetated shelf elevation 773.00 fmsl Sediment cleanout, top elevation (bottom of pond) 769.10 fmsl Sediment cleanout, bottom elevation 768.00 fmsl Sediment storage provided 1.10 ft is there additional volume stored above the state -required temp, pool? N (Y or N) Elevation of the top of the additional volume fmsl Form SW401-Wet Detention Basin-Rev.9-9117M Parts I- & IL Design Summary, Page 1 of 2 Permit No. (!o be provided by D W4) Il. DESIGN.INF,ORMATION__ Surface Areas Area, temporary pool 13,892 ftz Area REQUIRED, permanent pool 10,075 ft? SAIDA ratio 2.79 (unitless) Area PROVIDED, permanent pool, Apermpoal 10,290 fh OK Area, bottom of 1 Oft vegetated shelf, Ate, ndf 7,967 fe Area, sediment cleanout, lop elevation (bottom of pond), A,a_p,,d 3,384 ft' Volumes / k, / SD _5 1411 Volume, temporary pool _4r124 ft OK Volume, permanent pool, Vp , _x I 30,266 ft' Volume, forebay (sum of forebays if more than one forebay) 5,630 ft3 Forebay % of permanent pool volume 18.6% % OK SAIDA Table Data Design TSS removal 90 % Coastal SAIDA Table Used? N (Y or N) Mountain/Piedmont SAIDA Table Used? Y (Y or N) SAIDA ratio 2.79 (unitless) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) N (Y or N) Volume, permanent pool, V,, -,.,, 30,266 ft' Area provided, permanent pool, A,._,d 10,290 W Average depth calculated 3.00 ft OK Average depth used in SAIDA, d, (Round to nearest 0.5ft) 3.0 ft OK Calculator; option 2 used? (See Figure 10-2b) Y (Y or N) Area provided, permanent pool, Ap._,d 10,290 ff Area, bottom of 10ft vegetated shelf, Abt d,df 7,967 ft� Area, sediment cleanout, top elevation (bottom of pond), Ab,_pd 3,384 {� "Depth' (distance b1w bottom of 1 Oft shelf and top of sediment) 3,90 ft Average depth calculated 3.20 ft OK Average depth used in SAIDA, d., (Round to nearest 0.5ft) 3.0 ft OK Drawdown Calculations DTSwdown through orifice? Y (Y or N) Diameter of orifice (if circular) 1.50 in Area of odfice (if-non-circutar) in' Coefficient of discharge (Co) 0.60 (unitless) Driving head (H.) 1.34 ft Drawdown through weir'? N (Y or N) Weir type (unitless) Coefficient of discharge (C.) (unitless) Length of weir (L) ft Driving head (H) ft Pre -development 1-yr, 24-hr peak flow 0.34 ft3lsec Post -development 1-yr, 24-hr peak flow 0.34 ft3lsec Storage volume discharge rate (through discharge orifice or weir) 0.07 f0fsec Storage volume drawdown time 4.96 days OK, draws down in 2-5 days. Additional Information Vegetated side slopes 3 :1 OK Vegetated shelf slope 10 :1 OK Vegetated shelf width 10.0 ft OK Length of flowpath to width ratio 3 :1 OK Length to width ratio 3.0 :1 OK Trash rack for overflow & orifice? y (Y or N) OK Freeboard provided 1.0 ft OK Vegetated filter provided? N (Y or N) OK Recorded drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Drain mechanism for maintenance or emergencies is: Shear Gate Valve Form SW401-Wet Detention Basin-Rev.8-9117109 Parts I. & II. Design Summary, Page 2 of 2 Pond Design Worksheet Project: Robinhood Manor Watershed Characteristics 71281201 f � - i e Urrai age; S Surface Area (A B-GFa Area. _A Al! SCSCurve Numr 8.29 0.00 3.80 45.84% 2.79 C 85 Pro and Post -Development Flow *Rational Method Year ,Pre-'Daveloprnent 0,35 0.12 8.29 0.35 1� ,,Yebr;Podt-DevelopMent.'.!r;',' WN-2 DU L 0,05 0.12 8.29 0.85 - 10..Y6aiRre:DekieIbpr60t 0.35 5.81 0.29 18.86 I GY6dr. 0.85 5.81 8.29 40.94 100.Y6ar Post-Clev"elo'lp'm 8'_nC'! --' -;UE' 0.85 B.01 8.29 56.44 Pond Volume Reaulremerris Peak 131scharge/Elevation Rs uireme .±Quantitr! Teen o" Sediment Sto(Agb Twr 0 0 768.00 _kVYear 0.313 774.90 0.125 3782 F,10Year,J 1.48 775.02 T6W-Sedlrherit Stora e t 3782 769.10 N.100Yed7,J 2A1 775.06 ptift.vvq: podl i., 4.40 773.50 Su rface 'Area' R eq uIr&d 10,075 T 6 m p.W 0: S t 6 _r a ye 1.00 13919.24 774.63 10,290 Sim to Method I 13919.24 of JTempWQ Storage Provided I n"W F E i 1 47124 J�ZPPIEV=!J 302661 Storage Provided Stage/Stomaefunction Pond Structure HOW A 831VW1801S aNV SaNY113M alro 83iym - dqa NNE 90V Lg&��� g am rVVVVI(_ -4,0 Conlo�yrr,PF6rebeVV� WPond SAreaR€ t"t Carjo j,Wd F',n r! I 'j" 1, c;4duJI),"� Fk ~ -Twwor Dam 7 778.05 It Darii':9.' 768 ft 768.00 1,155 2,906 3,384 - ' 11134_rn.WldthW; to It 769.00 1.394 3,380 3,384 3.384 3,384 ;-�,WQ'0(1116G'Dla.ti; 1.5 In 770.00 1,634 3.888 4,413 3,898 7,282 4WQ 773.50 ft 771.00 1,892 4,411 5,522 4,987 12,249 772.00 2,166 4,952 6707 B,1 15 18,304 Dlaifieter:�'.'>X I'l 24 In 773,00 2,452 5515 7!987 7,337 25.701 774.04 ft 773.50 - 10.290 10,290 41664 30,266 Weir: Coeffiolent79'. 3.00 774,00 12614 12,614 5,726 36,992 Oflflea'COefficl6Wt 0.60 774.84 13892 13,892 11,133 47,124 Trash'Rsek--;,' 775,00 14138 14,138 2,242 49,366 36 in. 778.00 15,715 15,715 - Barrel 0.00 18.00 In 0.00 IrWUEsteqT*-J'-'j 769.00 ft 0.00 10.1,06Wn:StCe�ii* 768,00 0.00 U? 71.00 It 0.00 Coe;dle t,;,. 0.60 0,00 Sl 1,41% 0,00 0,00 Welr-CO6fflcIOhF'_Z_'! 3.00 0,00 775.03 ft 0,00 10.00 ft oe , SIIUS- T�5;70 4.501 4.50 Antl Width liifar i 5 ft HelOt.;PMR1 3 ft Safe '.Facto 1.31 Perm PO-01 w zy30266 of 22 Shelf I7967 af , - p1riliO--1T 0011 - Bdttdrri Pond " gl 184'SL-� ft Dap, (Optidn'11"', 3 I)zM(OOIIon'2)1_' I. ; 10 '61, 4 1 %111 Q 0 V # $' -��A CApt 4 SEAL • OU244 42 IN (j Ad cc 44 it C,-( Permit No. (to be provded by naval ILRWA NCDENR The Project name Contact person Phone number Date Drainage area number Site Characteristics Drainage area Impervious area, post -development % impervious Design rainfall depth Storage Volume: Nan -SA Waters Minimum volume required Volume provided Storage Volume: $A Waters O� � W AT�RQG P -C STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. Checklist (Part 111) must be printed, fitted out and submitted along with a of the required lnformarion. Rob' d Manor Apadment Homes '% x Wchael4iesloatt `, ? 336-3W-1480 7/28/2011 ' Wet pond #1 361,112 45 % 1.0 in 3,920 ft3 OK f�OK, volume provided is equal to or in excess of volume required. q-1- . 1.5 runoff volume y tr Pre-ivaopment 1-yr, 24-hr runoff fe Post -development 1-yr, 24-hr runoff if Minimum volume required fl3 Volume provided A` Peak Flow Calculations Is the prelpost control of the 1 yr 24hr storm peak flow requir ? :A .. Y . (Y or N) 1-yr, 24-hr rainfall depth 2.8 in Rational C, pre -development 0.35 (uni0ess) Rational C, post -development '.1 0.85 (unitless) Rainfall Intensity: I -yr, 24-hr storm 0.19IrVhr OK Are -development 1-yr, 24-hr peak flow 0.34 ft3lsec Post -development 1-yr, 24-hr peak flow 0.34 felsec PrelPostf-yr,24-hrpeak flow contral 0.00 ft3lsec Elevations Temporary pool elevation , " ' -_ 774.84 fmsi Permanent pool elevation 773,50 fmsi SHWT elevation (approx. at the perm. poa elevation). 768.00 fmsi Top of 10ft vegetated shelf elevation 774.00 fmsi Bottom of 10ft vegetated shelf elevation ;; 773.00 fmsi Sediment cleanout, top elevation (bottom (pond) 488& frnsf�' 7 ��� 00 Sediment deanout, bottom elevation < :769.00 frn9h---� Sediment storage provided 1.06 ft Is there additional volume stored abov the state -required temp. pool? N y . (Y or N) Elevation of the top of the additionalvolume a � fmsi Form SW401-Wet Detention Basin-Rev.e-9117ra9 Parts I. E IL Design Summery, Page 1 of 2 5K/g0901-f o 1 Permit Number: +` t (to be provided by DWQ) Drainage Area Number: :& i Bioretention 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 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 immediately. BMP element: Potentialproblems: 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 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, 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). n--- 1 -F A BMP element: Potentialproblems: How I will remediate the roblem: The pretreatment area Flow is bypassing Regrade if necessary to route all pretreatment area and/or flow to the pretreatment area. ulIies 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 are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessa Tree stakes/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 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 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 media 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 pH 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. BMP element: Potentialproblems: How I will remediate theproblem: 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 occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. sw109 0'V o/ 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:Robinhood Manor Apartment Homes BMP drainage area number:Bioretention Cell #1 Print name: fs 9 All Title: /1-1 9 -1 dt Address:.......... �d x _...30,/�.•,44 Ld rd AJCn 7 y Phone: 33 — d'L 9� - 9 0 / 0 Signature: _ Date:— 3 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��u ! 7" c.c. �-i �u y� a Notary Public for the State of �de 4 L.O v << , County of f,11Dnal _ , do hereby certify that /r personally appeared before me this Se day of (y! , and acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my hand and official seal, SEAL My commission expires 10-04—.2d % Form SW401-Bioretention I&M-Rev. 2 Page 4 of 4 � 1 i•. '�, ti �•• • yam= ' - . Permit Number: o (to be provided by DWQ) Drainage Area Number: �Lracc+� r Filter Strip, Restored Riparian Buffer and Level Spreader Operation and Maintenance Agreement l wilI 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: — ImmediateIy after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation — Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. — Once a year, the soil will be aerated if necessary. Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (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 filter strip Trash/debris is present. Remove the trash/debris. system The flow splitter device The flow sputter device is Unclog the conveyance and dispose (if applicable) clogged. of anysediment off -site. The flow sputter device is Make any necessary repairs or damaged. replace if damage is too large for repair. C..,.... QIII F I A A I 1 .,.1 Q,......,l,,.. 17.4 . Q+-.. D--. --4 D:..,....:.... U..FF.... n0.11A D— } n--- 1 -r i BMP element: Potentialproblem: How I will remediate theproblem: The swale and the level The swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the level lip, and shows stormwater has then plant a ground cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the Swale or just downslo e of the level lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long Maintain grass at a height of if a licable . approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to 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. Sediment is building up on Remove the sediment and the filter strip. restabitize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application, Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet. 401 Oversight Unit at 919-733-1786. C.,...« Qit II TA(AI 1 .,. 1 Q.....,., A__ Cf-:.. D..FC . nP.11A D_'1 T-)_ I _i l 5w4tD70ItDl Permit Number. - b�, i (to he 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:Robinhood Manor Apartment Homes BMP drainage area number:Bioretention Cell #1 Print name: l�a���r S�`�aI Title: Yla a— Address:"P.O. -L -o>c Ub - Phone: �3G- 29 z-yar a Signature: Date: 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. a Notary Public for the State of County of Qlu� lu�� , do hereby certify that r e " personally appeared before me this 1-7d day of v(1 , and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. SEAL My commission expires ❑.,-- 0111i IAn l I .. -t 0---- 4- r:l+-, L' , - D....F.......] D:......:.... D-CV- n v.RA D-1 I n. -- 'l -47 1 Sr✓q o90 Lto Permit Number: -5L-3'108 H eP1 (to be provided by DWQ) Drainage Area Number: -BfQccit -& z Bioretention 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 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 immediately. BMP element: Potentialproblems: 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 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, 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). BMP element: Potential roblems: 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 are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Tree stakes/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 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 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 media 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 pH 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. c.._ curAni D: t ti 1ID.AA o,...I n....-7 —17A BMP element: Potentialproblems: How 1 will remediate theproblem: The underdrain system Clogging has occurred. Wash out the underdrain system. if applicable) The drop inlet Clogging has occurred. CIean 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 occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786, S r~/H og o410/ 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:Robinhood Manor Apartment Homes BMP drainage area number:Bioretention Cell #2 Print name: �a "tj Title: Address: O -Eox ZI -11 q Phone: 33 C. - 29 2 - 90i a Signature: Date: •313 d /a 9 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. 1, /)0 U &&j , a Notary Public for the State of �Urih ��D 4a-If cf,. , County of Cz4 illor / , do hereby certify that �5"2 personally appeared before me this 56) day of vd , and acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my hand and official seal, SEAL My commission expires `D -69 aa1 1 Form SW401-Bioretention 1&M-Rev. 2 Page 4 of 4 1 � r � SWK o 4o'101 Permit Number: �raa (to be provided by DWQ) Drainage Area Number: '3#occ if -"-z- Fiiter Strip, Restored Riparian Buffer and Level Spreader 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: — Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation — Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. — Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. — Once a year, the soil will be aerated if necessary. — Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (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 filter strip Trash/debris is present. Remove the trash/debris. system The flow splitter device The flow splitter device is Unclog the conveyance and dispose (if applicable) clogged. of anysediment off -site. The flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for repair. c,...- ctitin inns I ., -i c. a C.'I .. c, n,,.,*,.....a u...,..— D.." . nv.n,r E)-., I n.,..., 1 -1 '1 BMP element: Potentialproblem: How I will remediate the roblem: The swale and the level The swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the level lip, and shows stormwater has then plant a ground cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the swale or just downslo e of the IeveI lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long Maintain grass at a height of if applicable). approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to 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, Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet. 401 Oversight Unit at 919-733-1786. ❑,._.„ OtLIT IAAI t -.,-I U.1+--Ca ;_ o....... A n..4V llD.6A D. '2 n---'7 _F'I Sh/gO°ro*o I Permit Number. Sasa-w,r (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:Robinhood_Manor Apartment Homes BMP drainage area number:Bioretention Cell #2 Print name: E�_O rrm �i ogee Title: Yea Address: tom• Q Phone: 33L — OI Z - 9 e5 i a Signature: Date: 3 �_3 d /o 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. 1i I, i.._.�1..�..AL Li�l _6A__�" , County of t a Notary Public for the State of -4- , do hereby certify that personally appeared before me this T<J day of .,, e , 2002, and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. 4 aa �_ SEAL My commission expires n,,...., C'uIT T14A1 7 .,...,I r. » a » r;4 » e.»: , o t » a u: »; 0'-Vr » n v_aA T)— I :: �� t ' .. � _'•r -, • R y • •} � .. ..i�•`. SWgo'joLjo/ Permit Number: (to be provided by DWQ) Drainage Area Number: a3 Bioretention 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 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 immediately. BMP element: Potentialproblems: 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 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, The pipe is dogged (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. a licable). C.,— C13TAf11 O.P.RA D....'2 n--- ! .,FA BMP element: The pretreatment area The bioretention cell: vegetation The bioretention cell: soils and mulch Potential problems: Flow is bypassing pretreatment area and/or gullies have formed. Sediment has accumulated to a depth greater than three inches. Erosion has occurred Weeds are present. Best professional practices show that pruning is needed to maintain optimal plant health. Plants are dead, diseased or dying. Tree stakes/ wires are present six months after planting. Mulch is breaking down or has floated away. Soils and/or mulch are clogged with sediment. An annual soil test shows that pH has dropped or heavy metals have accumulated in the soil media. How I will remediate the problem: Regrade if necessary to route all flow to the pretreatment area. Restabilize the area after grading. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and restabilize thepretreatment area. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Remove the weeds, preferably by hand. Prune according to best professional practices. Determine the source of the 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. Remove tree stake/wires (which can kill the tree if not removed). Spot mulch if there are only random 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. Determine the extent of the clogging - remove and replace either just the top layers or the entire media 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 Dolomitic lime shall be applied as recommended per the soil test and toxic soils shall be removed, disposed of properly and replaced with new planting media. __ C..«... Q\llAn l .-- !l P.Pd o.,.. '} n,...,, 7 of A BMA element: Potentialproblems: How I will remediate theproblem: The underdrain system CIogging 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 occurred at the Quality 401 Oversight Unit at 919- outlet. 733-1786. 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:Robinhood Manor Apartment Domes BMP drainage area number:Bioretention Cell #3 Print name:� Ct Title: / fMR r CC Address: P Q /--S C 6� r• P N S o N 7 Phone: 3-3 � — C;� `? I- - 9©1 4 Signature: Date: 3 /3 a/° % 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, l 06?4 /V Ai Ou a Notary Public for the State of �1JDrl [Q�� ti ti , County of ,�%t�i %�a-{C.� , do hereby certify that "a "g-4 Z personally appeared before me this ad day of o�, and acknowledge the due execution of the forgoing bioretention maintenance requirem nts. Wi a,y hand and official seal, SEAL My commission expires 14 -e !2 / / Form SW401-Bioretention 1&M-Rev. 2 Page 4 of 4 '.' � ., � •�. _ _ .. � �. . .'., , t _s .. ... _ ...' � •�' �� '�. S k/`t CY9 b't O Permit Number: a� (to be provided by DWQ) Drainage Area Number: -B oce- I :&3 Filter Strip, Restored Riparian Buffer and Level Spreader Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a Iog 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: — Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. — Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. Once a year, the soil will be aerated if necessary. Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set Iocation 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 filter strip Trash/debris is present. Remove the trash/debris. system The flow splitter device The flow sputter device is Unclog the conveyance and dispose (if applicable) clogged. of anysediment off -site. The flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for repair. c,...... V1171Innl i ,. -1 a ---- A-- V;I#-. c—;- n « A n:--- :-- o..4x _ n9.hA o,... Z n--- 1 _r'l BMP element- The Swale and the level lip The bypass channel The filter strip The receiving water Potential problem: The swale is clogged with sediment. The level lip is cracked, settled, undercut, eroded or otherwise damaged. There is erosion around the end of the level spreader that shows stormwater has bypassed it. Trees or shrubs have begun to grow on the swale or just downslope of the level lip. Areas of bare soil and/or erosive gullies have formed. Turf reinforcement is damaged or ripap is rolling downhill. Grass is too short or too long (if applicable). Areas of bare soil and/or erosive gullies have formed. Sediment is building up on the filter strip. Plants are desiccated Plants are dead, diseased or dying. Nuisance vegetation is choking out desirable species. Erosion or other signs of damage have occurred at the outlet. How I will remediate the problem: Remove the sediment and dispose of it off -site. Repair or replace lip. Regrade the soil to create a berm that is higher than the level lip, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Remove them. Regrade the soil if necessary to remove the gully, and then reestablish proper erosion control. Study the site to see if a larger bypass channel is needed (enlarge if necessary). After this, reestab[ish the erosion control material. Maintain grass at a height of approximately three to six inches. Regrade the soil if necessary to remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Remove the sediment and restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Provide additional irrigation and fertilizer as needed. Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Remove vegetation by hand if possible. If pesticide is used, do not allow it to get into the receiving water. Contact the NC Division of Water Quality local Regional Office, or the 401 Oversight Unit at 919-733-1786. r,._ O\l!i TAAI I --I c a r.:1.-- c.-:. D a D: D..FF CIV hA D.,., I D.,,.,. 7 -F 2 Permit Number: W&J C?'J 0q D (to be provided by DWQ) I acknowledge and agree by my signature below that 1 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:Robinhood Manor Apartment Homes BMP drainage area number: B ioretention Cell #3 Print name: 1�3 `; 1 1� 7 S' / G-- Title: MCC ✓7 -t 5 ,* /- Address:._ Phone: -3 3 4 Signature: Date:. 6' r'-e Q - s za rd 0 IV �-7-/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. a Notary Public for the State of J16) County of e4 i l�1),Q4Or , do hereby certify that - / Ay u'�, personally appeared before me this day of zoq d=k, and acknowledge the due execution of the forgoing filter strip, riparian bluffer,/and/or level spreader maintenance requirements. Witness my hand and official seal, SEAL My commission expires /4 _d4t' / 17--,, CA11T IAni I ,.. f c. + _ n:1+-, c.-:., o,.,,., -A D;--_;-- o..a;._ nv.nAD 'I n-__ '2 —F'I 5w`tD�o� Permit Number: (to be provided by DWQ) Drainage Area Number: `f`Ta+ i Infiltration Trench 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 of the infiltration trench will be carefully managed to reduce the sediment load to the sand filter. — The water level in the monitoring wells will be recorded once a month and after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). The infiltration trench 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 grass filter strip or Areas of bare soil and/or Regrade the soil if necessary to other pretreatment area 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, Sediment has accumulated to Search for the source of the a depth of greater than six sediment and remedy the problem if inches. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. The flow diversion The structure is clogged. Unclog the conveyance and dispose structure (if applicable) of any sediment off -site. The structure is damaged. Make any necessary repairs or replace if damage is too large for repair. C....... 01WAA1 0- 1 01,,.,., 1 _ r Z BMP element: Potentialproblem: How I will remediate theproblem: The trench Water is ponding on the Remove the accumulated sediment surface for more than 24 from the infiltration system and hours after a storm. dispose in a location that will not impact a stream or the BMP. The depth in the trench is Remove the accumulated sediment reduced to 75% of the original from the infiltration system and design depth. dispose in a location that will not impact a stream or the BMP. Grass or other plants are Remove the plants, preferably by growing on the surface of the hand. If pesticide is used, wipe it on trench. the plants rather than spraying. The observation well The water table is within one Contact the DWQ Stormwater Unit foot of the bottom of the immediately at 919-733-5083. system for a period of three consecutive months. The outflow pipe is clogged. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. The outflow pipe is damaged. Repair or replace the pipe. The emergency overflow Erosion or other signs of The emergency overflow berm will berm damage have occurred at the be repaired or replaced if beyond outlet. repair. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality 401 Oversight Unit at 91 9- outlet. 733-1786. c,.— cwnni I-r.I.-.,.:-- 'P---s, f1D.AA D- I n..,.,. 7 -Ir I 5k/I o� oho I 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-Robinhood Manor Apartment Homes BMP drainage area number:Infiltration Trench 41 Print name. -?>O rf,:4 SrcSa 1 Title: Address: t. a ��>< E.30G Phone: 336, - Signature: Date: 3 3d�o 9 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,11 .t , a Notary Public for the State of Of County of f� , do hereby certify that cSi �y personally appeared before me this 3o day of , and acknowledge the due execution of the forgoing infiltration trench maintenance requirements. Witness my band and official seal, SEAL My commission expires Ld -D Permit Number: (10 he provided by DWQ) Drainage Area Number: i Z-r' Filter Strip, Restored Riparian Buffer and Level Spreader 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: — ImmediateIy after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation — Stable groundcover will be maintained in the drainage area to reduce the sediment Ioad to the vegetation. — Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. — Once a year, the soil will be aerated if necessary. — Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (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 1 will remediate theproblem: The entire filter strip Trash/debris is present. Remove the trash/debris. system The flow splitter device The flow splitter device is Unclog the conveyance and dispose (if applicable) clogged, of any sediment off -site. The flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for repair. BMP element: Potential roblem: How I will remediate theproblem: The swale and the level The swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the level lip, and shows stormwater has then plant a ground cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the swale or just downslo a of the level lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long Maintain grass at a height of if applicable). approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to 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. Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. PIants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet. 401 Oversight Unit at 919-733-17$6. 1---- 01111 TA"I 1 --I C.........7. C.N.— Vt._ Unn.n.-..a 0:......:..« n..4T .. C%AAA D. i !].. ,... I _f 2 Permit Number: 5 wq C>J0Cf 01 (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:Robinhood Manor Apartment Homes BMP drainage area number: Infiltration Trench 41 Print name: �arrH c��Sg I Title: M c., a_9 e. Address: 1�• O . �toc F3o(.- rce,,; bro. tx. c, Z 7 111 9 L -25'z. - g a r b Signature: Date: 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. 1, 0 a Notary Public for the State of lf. *--Ih �U11 AJcd, , County of �'r �� ��� , do hereby certify that Gr f r �P ef a-IJ personally appeared before me this day of !�/ , �04 , and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. Witness my hand and official seal, SEAL A (' � My commission expires /to -4e9 -PD / I r,.-- curt I A A I I --I c— -A , V;I+-- Ll .-; , D—f A n: n..tr ..l1V.hA D, I tl--, 1 -r Z . - . . r. I .. ` -, .. 51V'qOgOFI0 f Permit Number: -*vc*8"rb7t' (to he provided by DWQ) Drainage Area Number: X r-.trz infiltration Trench 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 of the infiltration trench will be carefully managed to reduce the sediment load to the sand filter. -- The water level in the monitoring wells will be recorded once a month and after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). The infiltration trench 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 i Trash/debris is present. Remove the trash debris. The grass filter strip or Areas of bare soil and/or Regrade the soil if necessary to other pretreatment area 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. Sediment has accumulated to Search for the source of the a depth of greater than six sediment and remedy the problem if inches. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. The flow diversion The structure is clogged. Unclog the conveyance and dispose structure (if applicable) of any sediment off -site. The structure is damaged. Make any necessary repairs or replace if damage is too large for repair. BMP element: Potentialproblem: How I will remediate the roblem: The trench Water is ponding on the Remove the accumulated sediment surface for more than 24 from the infiltration system and hours after a storm. dispose in a location that will not impact a stream or the BMP. The depth in the trench is Remove the accumulated sediment reduced to 75`Yo of the original from the infiltration system and design depth. dispose in a location that will not impact a stream or the BMP. Grass or other plants are Remove the plants, preferably by growing on the surface of the hand. If pesticide is used, wipe it on trench. the plants rather than spraying. The observation well(s) The water table is within one Contact the DWQ Stormwater Unit foot of the bottom of the immediately at 919-733-5083. system for a period of three consecutive months. The outflow pipe is clogged. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. The outflow pipe is damaged. Repair or replace the pipe. The emergency overflow Erosion or other signs of The emergency overflow berm will berm damage have occurred at the be repaired or replaced if beyond outlet. repair. 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. 733-1786. c,....., cXunni naNA o,... -� n., -') nF'2 Permit Number: (to he provided by DWQ) 1 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:Robinhood Manor Apartment Homes BMP drainage area number: Infiltration Trench #2 Print nar Title:_ Address: `t / r 5 �0 X&a x r -P q e. t2L:20 G V-r Q Q 'IJ S L d '-a_ "(Z_ '17- 7 V Phone: Signature: Date: -3 3 Q 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. 4u Zt + 3 , a Notary Public for the State of Dl� �ko ira�, County of - i �U�� , do hereby certify that sty personally appeared before me this 3d day of /�(� c , and acknowledge the due execution of the forgoing infiltration trench maintenance requirements. Witness my hand and official Lam. SEAL My commission expires_ .LO — q- V I I t i, 1 r" , � J .' •.} � �\ • � � �. , 1 i •' � � 'S 1 SW�,Oac�tol Permit Number: -6oap r� (to be provided by DWQ) Drainage Area Number: —o-2 Filter Strip, Restored Riparian Buffer and bevel Spreader 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: — Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation — Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. — Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. — Once a year, the soil will be aerated if necessary. — Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (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 filter strip Trash/debris is present. Remove the trash/debris. system The flow splitter device The flow splitter device is Unclog the conveyance and dispose (if applicable) clogged. of anysediment off -site. The flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for re air. G'..— c111r r A A I 1 ---I C,..r.,...1.,« C; I+-,- Ct«;., 0.,..t....,.7 U;.....-;.,.. D..F%„- nP.A.4 o.... Z 17...... 1 of 2 BMP element: Potentialproblem: How I will remediate theproblem: The swale and the level The swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level Lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the level lip, and shows stormwater has then plant a ground cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the swale or just downslo a of the level lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long Maintain grass at a height of if applicable). approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to 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. Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet. 401 Oversight Unit at 919-733-17$6. c,.__ can inns I _._1 c a ❑;i. cr_:. n...... A o:....-: _ o..fr .. e-mkx n,,.. I n.,,.., 7 -r'I S i✓-t 01 Of't 01 Permit Number. (to he 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:Robinhood Manor Apartment Homes BMP drainage area number: Infiltration Trench #2 Print name: Title: Y�ona.gC� Address:'P. a . bx 430 (A C r�Ensbes.-o4 4� 2 7--- Phone: 33(o - 2G Z - 90/ D S Date: 3 �-� d�d 9 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. �OL L t +� , a Notary Public for the State of 'VUt- , County of 2L 14ccl , do hereby certify that personally appeared before me this 3'J day of , 07 e , and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. Witness my hand and official seal, SEAT, My commission expires `d c,...._, cnn inn i r ,. -1 Q---- A-, E7;4— Q.-;- n....., --A o:..,...,.., o..a;.- nQ.IkA D—'I n.. - '2 -f"I 5 wfol os-fo I Permit Number: (10 be provided by DWQ) Drainage Area Number: yTs*3 Filter Strip, Restored Riparian Buffer and Level Spreader 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: — Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation — Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. — Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. — Once a year, the soil will be aerated if necessary. — Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (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 1 will remediate theproblem: The entire filter strip Trash/debris is present. Remove the trash/debris. system The flow splitter device The flow sputter device is Unclog the conveyance and dispose (if applicable) clogged. of anysediment off -site. The flow splitter device is Make any necessary repairs or damaged. replace if damage is too large for repair. C,.— C%111 7An l i --] A— Caa,.- QM:.. D,.—,.,1 D:..,...-- U..FF - !NV., R D,,.. I n-,... 1 -i 2 BMP element: The swale and the level lip The bypass channel The filter strip The receiving water Potential problem: The swale is clogged with sediment. The level tip is cracked, settled, undercut, eroded or otherwise damaged. There is erosion around the end of the level spreader that shows stormwater has bypassed it. Trees or shrubs have begun to grow on the swale or just downslope of the level lip. Areas of bare soil and/or erosive gullies have formed Turf reinforcement is damaged or ripap is rolling downhill. Grass is too short or too long (if applicable). Areas of bare soil and/or erosive gullies have formed. Sediment is building up on the filter strip. Plants are desiccated. Plants are dead, diseased or dying. Nuisance vegetation is choking out desirable species. Erosion or other signs of damage have occurred at the outlet. How I will remediate the problem: Remove the sediment and dispose of it off -site. Repair or replace lip. Regrade the soil to create a berm that is higher than the level lip, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Remove them. Regrade the soil if necessary to remove the gully, and then reestablish proper erosion control. Study the site to see if a larger bypass channel is needed (enlarge if necessary). After this, reestablish the erosion control material. Maintain grass at a height of approximately three to six inches. Regrade the soil if necessary to remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application, Remove the sediment and restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Provide additional irrigation and fertilizer as needed. Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application. Remove vegetation by hand if possible. If pesticide is used, do not aIIow it to get into the receiving water. Contact the NC Division of Water Quality local Regional Office, or the 401 Oversight Unit at 919-733-1.786. ❑.._ ctitin inns I --I c---- A-- c:i.,... C«_:_ A.....,. --A o: O.oPr nP AA 0—'1 n.,,.., `) lir Z Permit Number: .st✓tC7q0z-i O/ (to he provided by DWO 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:Robinhood Manor Apartment Homes BMP drainage area number: Infiltration Trench #3 Print name:fS `r Title: / `", g - 7 q Address: _�•_ ® X 3 6 �r r e-�, s 1a --d /V C Phone: n Signature: Date: 3 �3 % % 0 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. / u-- n , a Notary Public for the State of , County of flj�,ca� , do hereby certify that i r-P personally appeared before me this Sd day of ADO , and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. Witness my hand and official seal, �O SEAL My commission expires_ ILI)-dui—.Dt/ r_-- 011IT inns I ,.. I Cc...... —A—.. 17:4-- Q.-:- F)--., --A o:. o..tr nn.AA o.... I n.. _ 2 -f 2 ..., 1t i', ' ,�t, . ti � ' r ; ,�, • � S• �, � , •� • . r , s -- ..., �y � --. l 5W it 001 c1q C) / Permit Number: 54�u (to be provided by DWO Drainage Area Number: �r-a-3 Infiltration Trench 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 of the infiltration trench will be carefully managed to reduce the sediment load to the sand filter. — The water level in the monitoring wells will be recorded once a month and after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). The infiltration trench 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 1 will remediate theproblem: The entire BMP Trash/debris is present, Remove the trash/debris. The grass filter strip or Areas of bare soil and/or Regrade the soil if necessary to other pretreatment area 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. Sediment has accumulated to Search for the source of the a depth of greater than six sediment and remedy the problem if inches. possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. The flow diversion The structure is clogged. Unclog the conveyance and dispose structure (if applicable) of any sediment off -site. The structure is damaged. Make any necessary repairs or replace if damage is too large for repair. BMP element Potentialproblem: How I will remediate theproblem: The trench Water is ponding on the Remove the accumulated sediment surface for more than 24 from the infiltration system and hours after a storm. dispose in a location that will not impact a stream or the BMP. The depth in the trench is Remove the accumulated sediment reduced to 75% of the original from the infiltration system and design depth. dispose in a location that will not impact a stream or the BMP. Grass or other plants are Remove the plants, preferably by growing on the surface of the hand. If pesticide is used, wipe it on trench. the plants rather than spraying, The observation well(s) The water table is within one Contact the DWQ Stormwater Unit foot of the bottom of the immediately at 919-733-5083. system for a period of three consecutive months. The outflow pipe is clogged. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. The outflow piRe is damaged.. Repair or replace the pipe. The emergency overflow Erosion or other signs of The emergency overflow berm will berm damage have occurred at the be repaired or replaced if beyond outlet. repair. 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. 733-1786. t,--., VIVAni -r_,--L, nn.nA u,... 1 n--- 7 -f'I 5c'Itto 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:Robinhood Manor Apartment Homes „ „ ,,._......,.._.. BMP drainage area number: Infiltration Trench #3 Print name: Title: M r ., r - Address: P._0. JfSax _ tea �- rC--"5bO'O uJc Z-29?/IT Phone: 33 C.- Z9 z-'16 i o Signature: Date: 3 13 d d 9 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. 1, I " 1, L a Notary Public for the State of C1-4.t-L County of (A& i fla4&17 , do hereby certify that personally appeared before me this SZ day of , and acknowledge the due execution of the forgoing infiltration trench maintenance requirements. Witness my hand and official seal, SEAL My commission expires 1 '�9 - �O y -0?4 %/ V--- CIINMI CIP.KA D- I T)1-- '1 -4 - 'I 6 — Compliance Inspection Report Permit: SVV4090401 Effective: 10/12/09 Expiration: 04/14/19 Owner: Robinhood Court Apartment Homes LLC Project: Robinhood Court Apartment Homes County: Forsyth Robinhood Rd Region: Winston-Salem Contact Person: Michael B Westcott Title: Directions to Project: Type of Project: State Stormwater - HD - Bioretention Drain Areas: 001 - (Muddy Creek) (03-07-04) ( C) 002 - (Muddy Creek) (03-07-04 ) ( C) 003 - (Muddy Creek) (03-07-04 ) ( C) 004 - (Muddy Creek) (03-07-04 ) ( C) 005 - (Muddy Creek) (03-07-04 ) ( C) 006 - (Muddy Creek) (03-07-04) ( C) 007 - (Muddy Creek) (03-07-04) ( C) On -Site Representative(s): Related Permits: Inspection Date: 0611512011 Entry Time: 09:00 AM Primary Inspector: Sue L Homewood Secondary Inspector(s): Robert D Patterson Brian Lowther Reason for Inspection: Follow-up Permit Inspection Type: State Stormwater Facility Status: ❑ Compliant ■ Not Compliant Question Areas: ® State Stormwater (See attachment summary) Winston Salem NC 27106 Phone: 336-812-3546 State Stormwater- HD - Infiltration Exit Time: 11:00 AM Phone: 336-771-4964 Phone: Phone: Inspection Type: Compliance Evaluation Page: 1 Permit: SW4090401 Owner - Project: Robinhood Court Apartment Homes LLC Inspection Date: 06/15/2011 Inspection Type: Compliance Evaluation Reason for Visit: Follow-up Inspection Summary: File Review Yes No NA NE Is the permit active? ■ n n n Signed copy of the Engineer's certification is in the file? ■ n n n Signed copy of the Operation & Maintenance Agreement is in the file? a n n n Copy of the recorded deed restrictions is in the file? n n n Comment: Built Upon Area Yes No NA NE Is the site BUA constructed as per the permit and approval plans? ■ n n n Is the drainage area as per the permit and approved plans? ■ n n n Is the BUA (as permitted) graded such that the runoff drains to the system? ® n n n Comment: repaired roof drains that were not properly draining to bmp. SW Measures Yes No NA NE Are the SW measures constructed as per the approved plans? n ® n Cl Are the inlets located per the approved plans? ® In n n Are the outlet structures located per the approved plans? ■ n n n Comment: working on modification and ammendmentslas built changes. Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? ■ n n Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ n n n n upon request? Comment: repaired maintenance problems. Other Permit Conditions Yes No NA NE Is the site compliant with other conditions of the permit? n ® n n Comment: final bmp not installed but buildings occupied. Other WQ Issues Yes No NA NE Is the site compliant with other water quality issues as noted during the inspection? n ® n n Comment: sediment loss into stream, site not stable as needed. Page. 2 Compliance Inspection Report Permit: SW4090401 Effective: 10/12/09 Expiration: 04/14/19 Owner: Robinhood Court Apartment Homes LLC Project: Robinhood Court Apartment Homes County: Forsyth Robinhood Rd Region: Winston-Salem Contact Person: Michael B Westcott Title: Directions to Project: Type of Project: State Stormwater - HD - Bioretention Drain Areas: 001 - (Muddy Creek) (03-07-04) ( C) 002 - (Muddy Creek) (03-07-04 ) ( C) 003 - (Muddy Creek) (03-07-04) ( C) 004 - (Muddy Creek) (03-07-04 ) ( C) 005 - (Muddy Creek) (03-07-04 ) ( C) 006 - (Muddy Creek) (03-07-04) ( C) 007 - (Muddy Creek) (03-07-04 ) ( C) On -Site Representative(s) Related Permits: Inspection Date: 05/1912011 Entry Time: 10:00 AM Primary Inspector: Sue L Homewood Secondary Inspector(s): Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: ❑ Compliant ■ Not Compliant Question Areas: ® State Stormwater (See attachment summary) Winston Salem NC 27106 Phone: 336-812-3546 State Stormwater - HD - Infiltration Exit Time: 11:30 AM Phone: 336-771-4964 Inspection Type: Compliance Evaluation Page: 1 Permit: SVV4090401 owner - Project: Robinhood Court Apartment Homes LLC Inspection Date: 05/19/2011 Inspection Type: Compliance Evaluation Reason for Visit: Routine Inspection Summary: File Review Is the permit active? Signed copy of the Engineer's certification is in the file? Signed copy of the Operation & Maintenance Agreement is in the file? Copy of the recorded deed restrictions is in the file? 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: roof drains from some buildings not draining to BMP n\Rr RA ---...._.- Are the SW measures constructed as per the approved plans? Are the inlets located per the approved plans? Are the outlet structures located per the approved plans? Comment: see inspection letter, many problems throughout site ®nnn ®nnn ®nnn n n n n n n nnn n®nn Yes No NA NE 0 E 0 0 n®nn n®nn Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? n ® n n Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ n n n upon request? Comment: see inspection letter Other Permit Conditions Yes No NA NE Is the site compliant with other conditions of the permit? n ® o o Comment: One BMP not converted from sediment pond yet although buildings occupied. Other WQ Issues Yes No NA NE Is the site compliant with other water quality issues as noted during the inspection? n ® n n Comment: sediment loss Into stream. sediment pond maintenance needed. Page: 2 Compliance Inspection Report Permit: SW4090401 Effective: 10/121C9 Expiration: 04/14/19 Owner: Robinhood Court Apartment Homes LLC Project: Robinhood Court Apartment Homes County. Forsyth Robinhood Rd Region: Winston-Salem Contact Person: MichaO B Westcott Title: Directions to Project: Type of Project: State Stormwater - HD - Bioretention Drain Areas: 001 - (Muddy Creek) (03-07-04) ( C) 002 - (Muddy Creek) (03-07-04) ( C) 003 - (Muddy Creek) (03-07-04) ( C) 004 - (Muddy Creek) (03-07-04) ( C) 005 - (Muddy Creek) (03-07-04 ) ( C) 006 - (Muddy Creek) (03-07-04 ) ( C) 007 - (Muddy Creek) (03-07-04 ) ( C) On -Site Representative(s): Related Permits: Inspection Date: 03122/2010 Entry Time: 11:30 AM Primary Inspector: Sue L Homewood Secondary Inspector(s): Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: Q Compliant ■ Not Compliant Question Areas: ® State Stormwater (See attachment summary) Winston Salem NC 27106 Phone: 336-812-3546 State Stormwater - HD - Infiltration Exit Time: 12:30 PM Phone: 336-771-4964 Inspection Type: Compliance Evaluation Page: 1 1�: Permit: SW4090401 Owner - Project: Robinhood Court Apartment Homes LLC Inspection Date: 03122/2010 Inspection Type: Compliance Evaluation Reason for Visit: Routine Inspection Summary: File Review Yes No NA N Is the permit active? ■ n n n Signed copy of the Engineer's certification is in the rile? n ■ n n Signed copy of the Operation & Maintenance Agreement is in the rile? ■ n n n Copy of the recorded deed restrictions is in the file? n n n ■ Comment: no engineer cert on file per engineer representative attending site visit. Built Upon Area Yes No NA NE Is the site BUA constructed as per the permit and approval plans? ■ n n n is the drainage area as per the permit and approved plans? ■ n n n Is the BUA (as permitted) graded such that the runoff drains to the system? ■ n n n Comment: Only evaluated for drainage areas that are stabilized and occupied at the time of the inspection. SW Measures Yes No NA NE Are the SW measures constructed as per the approved plans? n ■ n n Are the inlets located per the approved plans? ® n n n Are the outlet structures located per the approved plans? ■ ❑ U Comment: Measures not completed prior to occupancy. Biocell #2 installed but not vegetated, Biocell #3 not constructed yet. Both areas occupied. Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? D n 0 Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ n ❑ ❑ ■ upon request? Comment: Other Permit Conditions Yes No NA NE Is the site compliant with other conditions of the permit? n ®n n Comment: Occupying property prior to completion/operation of SMPs. Other WQ Issues Yes No NA NE Is the site compliant with other water quality issues as noted during the inspection? ■ n n n Comment: Page: 2 0-tS INFILTRATION BASIN O & M Inspection Report 1. Drainage area is managed to reduce the sediment load to the basin: ,!j- LJ H Li 2. Bypass structure / Vegetated filter is free of erosion and obstructions: ❑ ❑ ❑ 3. Inlet device is free of erosion, damage or clogs: ❑ ❑ ❑ 4. Pretreatment area free of excessive sediment: v-%(D -�[x� ❑ ❑ K ❑ 5. Pretreatment area is free of erosion: ,goG� VVDr �1�04 El 6. Rip rap (if used) is, in correctly placed: 6La011 ❑ ❑ 1�f ❑ 7. Perimeter of the infiltration basin is free of bare soil or erosion: ❑ ❑ ❑ 8. Vegetation around the basin is maintained at -6 inches height: [ ❑ ❑ ❑ 9. Slopes and bottom are free of erosion and woody vegetation (trees or shrubs): ❑ ❑ ❑ E'+: i ' Sher ' w.a3..� na+7i uRef 4� - i�"r�; p! r. +L Ori ' i �� `L ,� kr •' ,4 La rli 4 '. � yE r531-:-m' 1 1 z N t 1'` 7 r ry_7,�_ 'T F' �.� ;v �,';._ {l fl �Maiiri,Treat'inent.A'rea x�:���'�#�;�:,��a1.Z�aG=~^?�At�:.:r�..'�:;���-,»:��..���..�,.,fi�.�•� 1'�#�'�'.�.-�.����,��������I�������:�R��;�� 10. Main treatment area is free of weeds: E�- ❑ ❑ ❑ 11. Vegetation in the basin is maintained at -6 inches height: ❑ ❑ ❑ 12. Main treatment area is free of excessive sediment: ❑ ❑ ❑ 13. Main treatment surface area is free of clogs: ❑ ❑ ❑ 14. Basin is drained and it has been more than 5 days since last rain: ❑ ❑ ❑ ,� ¢}•• YI• t"`.1 :l4i� Y ``i � +1 . Y7 1 9"'� i �VQ � �y'�Y l I r i�h 1 1 SYf '{kip {fit rya` '-X 1r i' f 1i v� ' E��'���I�t��.���_�..�.�w< �.><��:.����':F�ar 1' 15. Outlet device is free of erosion, clogs or damage: ❑ ❑ ❑ 16. Orifice size matches approved plans: ❑ ❑ ❑ 17. Relative elevations match approved plans: ❑ M, ❑ ❑ 18. Outlet device draining properly - (free of standing water, cattails, etc.): Nr ❑ ❑ ❑ V3.3_09 LEVEL SPREADERS, FILTER STRIPS AND RESTORED RIPARIAN BUFFERS O & M Inspection Report Flow Splitter/Bypass 1. The flow splitter device is free of clogs or damage: 2. Stormwater bypass is installed: ❑ ❑ ❑ 3. Orifice size/weir heights match approved plans: El ❑ El 4. Turf reinforcement and rip rap are in good condition and the correct location: ❑ ❑ ❑ 5. Bypass channel is free of bare areas and erosion: 1!� ❑ ❑ ❑ Filter Strip/ Level Lip 6. Level lip is in good condition (has not settled, been undercut, or eroded): ❑ ❑ ❑ 7. Filter Strip/ Level Lip is free of areas of bare soil, erosion or gullies: ❑ ❑ El 8. Filter Strip is free of excessive sediment accumulation: ❑ ❑ ❑ 9. Swale is free of excessive (covers grass, N4in. or more) sediment accumulation: ❑ ❑ ❑ 10. Level spreader is located as per the approved plans and is the correct length: ❑ ❑ Vegetation 11. Filter strip is densely vegetated: ❑ ❑ ❑ 12. Filter strip grass is maintained at a height of 3 to 6 inches: ❑ ❑ ❑ 13. Plants are healthy and are being maintained: � ElEl❑ 14. Down -slope area of the level lip is free of trees or shrubs: � !f ❑ ❑ ❑ 15. Nuisance or invasive vegetation has been properly removed:r ❑ ❑ ❑ 16. Outlet is free of erosion, clogs or damage: 4 ❑ ❑ ❑ 17. Level spreader end is free of erosion: \,Rf ❑ ❑ ❑ V3.3 09 0-0 D BIORETENTION CELL: O & M Inspection Checklist 1. Inlet and Perimeter are free of erosive gullies and bare soil areas-. X ❑ ❑ 2. Inlet device (swale, pipe, stone verge) is free of erosion, damage or clogs: ❑ ❑ 3. Weir heights appear to match approved plans: � ❑ ❑ ❑ P..RETREATMENT {'•q t1 s, ^ ' A. k }i r` �;'t �;'A*Ak' . .=. "+ a �€ i< ,a ,• s 4. Flow is entering pretreatment area (not being bypassed): �Gp Ipl1`� +�rL• ❑ L. ❑ ❑ 5. Pretreatment area is free of erosion: 16 ❑ ❑ ❑ 6. Pretreatment area is free of excessive sediment or clogs: ❑ ❑ ❑ -AY ,!`Ti�� ��- �a RS MAIN':TREATMENT{AREA S,f }� �`' �r� ' M'J3f Y.1i / �Yl i wz � x xH NkGl:i� %1 7�tti'K..Y.1�y� . ;gip �3 ^r��f.1r V f 7. Side slopes are 3:1 or less: ❑ ❑ ❑ 8. The under drain system is free flowing and free of clogs (if applicable): 1�f ❑ ❑ ❑ 9. Cleanout(s) and cap is provided for the under drain as per the approved plans: ❑ ❑ ❑ 10. Heavy equipment has not been driven into the cell: ( ❑ ❑ ❑ 11. Surface is free of piles of heavy materials (piles of mulch, etc): ❑ 0 ❑ ❑ 12. Ponding depth is 9-12 inches after rain: ❑ Z ❑ ❑ 13. All dimensions are >=10ft.: ❑ ❑ ❑ y ...... �. ..TZ(3N- - -� . ry <., of :�. v :y .:-'� +!; : -y.r. a. .s . • a. SOIL./fNUIIGH and,,VkE &A.,� 14. Plants are healthy and being maintained: ❑ ,l ❑ ❑ 15. The proper amount and type of vegetation is present in the cell: ❑ IN ❑ ❑ 16. Mulch is in good condition (has not broken down or floated/ migrated towards the outlet): ❑ ❑ ❑ 17. Surface if free of excessive sediment and clogs: ❑ •q ❑ ❑ 18. Trees are free of stakes/wires > 6 months after planting: ❑ ❑ �, ❑ 19. The annual soil test shows the proper pH and absence of heavy metal accumulation: ❑ ❑ ❑ n 20. Outlet is free of evidence of improper drainage (no standing water, cattails, etc.): .9 ❑ ❑ ❑ 21. Outlet device (drop inlet, weir, etc.) is free of damage or clogs: ❑ �& 9 ❑ 22. Orifice size matches approved plans: ❑ ❑ ❑ 23. Outlet is free of damage, clogs, or erosion: ❑ M. ❑ ❑ 24. Relative elevations match approved plans: ❑ ❑ ❑ oJcr-rI f � K-QcL1/' V3.3_09 LEVEL SPREADERS, FILTER STRIPS AND RESTORED RIPARIAN BUFFERS O & M Inspection Report 1. The flow splitter device is free of clogs or damage: 2. Stormwater bypass is installed: ❑ ❑ ❑ 3. Orifice size/weir heights match approved plans: ❑ ❑ ❑ 4. Turf reinforcement and rip rap are in good condition and the correct location: ❑ ❑ ❑ 5. Bypass channel is free of bare areas and erosion: ❑ ❑ ❑ Filter Strip/ Level Lip 6. Level lip is in good condition (has not settled, been undercut, or eroded): ❑ ❑ ❑ 7. Filter Strip/ Level Lip is free of areas of bare soil, erosion or gullies: ❑ ❑ ❑ 8. Filter Strip is free of excessive -sediment accumulation: ❑ ❑ ❑ 9. Swale is free of excessive (covers grass, —4in. or more) sediment accumulation: ❑ ❑ t91 ❑ 10. Level spreader is located as per the approved plans and is the correct length: ❑ ❑ ❑ Vegetation 11. Filter strip is densely vegetated: ❑ ❑ ❑ 12. Filter strip grass is maintained at a height of 3 to 6 inches: ❑ ❑ ❑ 13. Plants are healthy and are being maintained: ❑ ❑ ❑ 14. Down -slope area of the level lip is free of trees or shrubs: ❑ ❑ ❑ 15. Nuisance or invasive vegetation has been properly removed: ❑ ❑ ❑ Outlet 16. Outlet is free of erosion, clogs or damage: ❑ ❑ ❑ 17. Level spreader end is free of erosion: ❑ ❑ ❑ V3.3_09 BIORETENTION CELL: O & M Inspection Checklist 1. Inlet and Perimeter are free of erosive gullies and bare soil areas: ❑ ❑ ❑ 2. Inlet device (swale, pipe, stone verge) is free of erosion, damage or clogs: .� ❑ ❑ ❑ 3. Weir heights appear to match approved{ plans: ❑ ❑ ❑ Y i,,.. SS .M1S_ �. `r.. � 1 1 el q i L 1 d 3 31f 1 �11�ti'� W 41 ri PRETREATMEfVTt f:1 � t V ': ; T�a� "A� : 5 '" ` z ? 1 ;°� 1 t °' 4. Flow is entering pretreatment area (not being bypassed): ❑ ❑ ❑ 5. Pretreatment area is free of erosion: ❑ ❑ ❑ 6. Pretreatment area is free of excessive sediment or clogs: ❑ ❑ ❑ tY 'hL-i•' 3� k ;,MAIN•, REATMENT AREAy w ,.. a _. , ' ,_ ; �s r. r- ��` ` '?t�5t,ei ti}� F Z";Ai 7. Side slopes are 3:1 or less: [ ❑ ❑ ❑ 8. The under drain system is free flowing and free of clogs (if applicable): ❑ ❑ ❑ 9. Cleanout(s) and cap is provided for the under drain as per the approved plans: `lam ❑ ❑ ❑ 10. Heavy equipment has not been driven into the cell: X ❑ ❑ ❑ 11. Surface is free of piles of heavy materials (piles of mulch, etc): X ❑ ❑ ❑ 12. Ponding depth is 9-12 inches after rain: ❑ ❑ ❑ 13. All dimensions are >=10ft.: D?� ❑ ❑ ❑ �"s1.Sai+ 4 H 7;''#ti.•��• h".'!!7'.F7s :SOIL/,MULCFIiandVEGETATION.t`'�•;a'��. y; ra.. ,. :'.+;,i,:s r:sti� :��'.,:. �;::''c 14. Plants are healthy and being maintained: ❑ ❑ ❑ 15. The proper amount and type of vegetation is present in the cell: �'1� e cb ( g ❑ ❑ 16. Mulch is in good condition (has not broken down or floated/migrated towards the outlet): ❑ ❑ 6, ❑ 17. Surface if free of excessive sediment and clogs: P� ❑ ❑ ❑ 18. Trees are free of stakes/wires > 6 months after planting: ❑ ❑ 9 ❑ 19. The annual soil test shows the proper pH and absence of heavy metal accumulation: ❑ ❑ R ❑ R Jr r 1,�11}}..1h�,5 y�,WS'<c"j t '. S 'A +a•e. �.�,�y..,,,. 77. �'i°,.'a �;�r�t�:T{-.Ff�a"1^r,i i�¢�h OUTLIET :�- �� � f'A [ 7u M�f Nn�f�:"11 �' .���ff! ._L].�1W ^I N7 �Y{kr.'1r4���}i+Y4�'5 1 6 �. • k t C 4ri.'�1,.c 4W+"$' � I�.fN.G :i�'Fai7A?+,"?^fi ��11..�� �Lyy,,� ray 'SL"�(Ir n�yer.f•i 1n1 u � 'S�Si. �1n �$'Jr .��. i.,,%�: 20. Outlet is free of evidence of improper drainage (no standing water, cattails, etc.): ;k ❑ ❑ ❑ 21. Outlet device (drop inlet, weir, etc.) is free of damage or clogs: IE�, - ❑ ❑ 22. Orifice size matches approved plans: �K ❑ ❑ ❑ 23. Outlet is free of damage, clogs, or erosion: 1�f, ❑ ❑ ❑ 24. Relative elevations match approved plans: -�, 4�_ l4� ❑ 9 ❑ ❑ V3.3_o9 DC' LEVEL SPREADERS, FILTER STRIPS AND RESTORED RIPARIAN BUFFERS O & M Inspection Report Flow Splitter/Bypass 1. The flow splitter device is free of clogs or damage: ❑ ❑ ❑ 2. Stormwater bypass is installed: ❑ ❑ ❑ 3. Orifice size/weir heights match approved plans: [� ❑ ❑ ❑ 4. Turf reinforcement and rip rap are in good condition and the correct location: ❑ ❑ ❑ 5. Bypass channel is free of bare areas and erosion: E� ❑ ❑ ❑ Filter Strip/ Level Li 6. Level lip is in good condition (has not settled, been undercut, or eroded): a ❑ ❑ ❑ 7. Filter Strip/ Level Lip is free of areas of bare soil, erosion or gullies: ❑ ❑ 8. Filter Strip is free of excessive sediment accumulation: ❑ ❑ ❑ 9. Swale is free of excessive (covers grass, —4in. or more) sediment accumulation: ❑ ❑ 9 ❑ 10. Level spreader is located as per the approved plans and is the correct length: ❑ )9 ❑ ❑ Vegetation 11. Filter strip is densely vegetated: ❑ ❑ ❑ 12. Filter strip grass is maintained at a height of 3 to 6 inches: ❑ ❑ ❑ 13. Plants are healthy and are being maintained: ❑ ❑ ❑ 14. Down -slope area of the level lip is free of trees or shrubs: ❑ ❑ ❑ 15. Nuisance or invasive vegetation has been properly removed: [ ❑ ❑ ❑ Outlet 16. Outlet is free of erosion, clogs or damage: ❑ ❑ ❑ 17. Level spreader end is free of erosion: ;K ❑ ❑ ❑ V3.3_09 � INFILTRATION BASIN 0 & M Inspection Report N Drainage area is managed to reduce the sediment load to the basin: Li 1)�' Li U 2. Bypass structure / Vegetated filter is free of erosion and obstructions: ❑ ❑ ❑ 3. Inlet device is free of erosion, damage or clogs: ❑ ❑ ❑ 4. Pretreatment area free of excessive sediment: ❑ ❑ ❑ 5. Pretreatment area is free of erosion: ❑ ❑ ❑ 6. Rip rap (if used) is in correctly placed: ❑ ❑ ❑ 7. Perimeter of the infiltration basin is free of bare soil or erosion: ❑ 19� ❑ ❑ 8. Vegetation around the basin is maintained at —6 inches height: i� ❑ ❑ ❑ 9. Slopes and bottom are free of erosion and woody vegetation (trees or shrubs): ❑ ❑ ❑ Mai� Ire 'fi - Ydf�`,=� �� " 1'i .1c fl � T4,- #iY f i- '- Y Y•• J. .4'E3 ri _ k' n Treatment Area II, �,, �1.66 � � . ;{{y6 a �, 4 �._.e ;1k, •.� l ..'S�k..c4iR1. . :3 R��i ./1�C'��.^'!.Y i+Y,. Fi^i.n.5'?+f[ . 10. Main treatment area is free of weeds: ❑ ❑ ❑ 11. Vegetation in the basin is maintained at —6 inches height: ❑ ❑ ❑ 12. Main treatment area is free of excessive sediment: ❑ ❑ ❑ 13. Main treatment surface area is free of clogs: ❑ ❑ 14. Basin is drained and it has been more than 5 days since last rain: ❑ ❑ ❑ f �.,.r- a:':rc -- —u; [ °Yis.-. - +f� 1` e � �x• ,. .!�'Tbivi ''�`.%-Y x G ��G°, _ �3�i1 'k%.�'ci «�.=�. `i "" � '�. �'Ys� `�!� �} fi�, f xv"4' >P ��'t�; �:G� r � �_" fr�'ty>'� �.. �putlet Device�,����,�+����, ���.k �`;�;: �.s.. �;�, �i� ��,� 4�:��► ��`-�.��<:�s�c�3=�fi�:��.�: ���. _�t..:��:� _., . .�.:..i'ykr�Ei'� � 15. Outlet device is free of erosion, clogs or damage: ❑ ❑ ❑ 16. Orifice size matches approved plans: ❑ ❑ ❑ 17. Relative elevations match approved plans: 12r ❑ ❑ ❑ 18. Outlet device draining properly — (free of standing water, cattails, etc.): ❑ ❑ ❑ V3.3_o9 LEVEL SPREADERS, FILTER STRIPS AND RESTORED RIPARIAN BUFFERS O & M Inspection Report Flow Splitter/Bypass 1. The flow spiitter device is free of clogs or damage: 25, ❑ ❑ ❑ 2. Stormwater bypass is installed: 3. Orifice size/weir heights match approved plans: ❑ ❑ ❑ ❑ 4. Turf reinforcement and rip rap are in good condition and the correct location: ❑ ❑ ❑ 5. Bypass channel is free of bare areas and erosion: ❑ ❑ ❑ Filter Strip/ Level Lip 6. Level lip is in good condition (has not settled, been undercut, or eroded): ❑ ❑ 7. Filter Strip/ Level Lip is free of areas of bare soil, erosion or gullies: ❑ ❑ ❑ 8. Filter Strip is free of excessive sediment accumulation: 2( ❑ ❑ ❑ 9. Swale is free of excessive (covers grass, —4in. or more) sediment accumulation: ❑ ❑ Q ❑ 10. Level spreader is located as per the approved plans and is the correct length: ❑ ❑ ❑ Vegetation 11. Filter strip is densely vegetated: ❑ 18, ❑ ❑ 12. Filter strip grass is maintained at a height of 3 to 6 inches: ❑ ❑ ❑ 13. Plants are healthy and are being maintained: ❑ ❑ ❑ 14. Down -slope area of the level lip is free of trees or shrubs: I& ❑ ❑ ❑ 15. Nuisance or invasive vegetation has been properly removed: ❑ ❑ ❑ Outlet 16. Outlet is free of erosion, clogs or damage: ❑ ❑ ❑ 17. Level spreader end is free of erosion: ❑ ❑ ❑ V3.3_o9 sociates, PLLC Engineer's Certification of'Storniwater Control Completion I certify, to the best of my knowledge, information and belief', that the permanent stormwater contr of labeled as Infiltration Trench 1 for Robinhood Court (formerly Robinhood Manor) Apartment Homes as iecorded in PB 57, PG 127 in the Office of the Forsyth County Registrar of'Deeds has been completed in conformance with the plans and specifications approved by NCDENR DWQ on April 14, 2009. r gas9�C GA Seal here: ,� \`�.,�4``4t��, yyy y4 h a i a • 0 4 B �adCse�0a34 I certify, to the best of my knowledge, information and belief, that the permanent stormwater control labeled as Infiltration Trench 2 for Robinhood Court (forrrierly Robinhood Manor) Apartment Homes as recorded in PB 57, PG 127 in the Office of the Forsyth County Registrar of Deeds has been completed in conformance with the platys and specifications approved by NCDENR DWQ on April 14, 2009. c64aaIII aI,, Seal here: 0.4�,tN CA f40 a I certify, to the best of my knowledge, information and belief, that the permanent stormwater• control labeled as Infiltration Trench 3 for-Robinhood Court (formerly Robinhood Manor) Apartment Homes as recorded in PB 56, PG 124 in the Office of the Forsyth County Registrar of'Deeds has been completed in conformance with the plans and specifications approved by NCDENR DWQ on April 14, 2009. ••Qa4g98�+D�� Seal here: o,•o CAR e 100 ¢ n �FESSfs e d O� H �3 ee�• iy :y , ' 1. b S 4015 Meeting Way, Suite 105 • A[gh Point, North Carolina 27265 • phone. 336-812-3546 r fax - 336-812-8075 I certify that the permanent runoff control structure Bioretention Cell #1 for Robinhood Manor Apartment Homes as recorded in PB 56, PG 124 in the office of the Guilford County Register of Deeds has been completed in conformancetWjth,.t ie approved plans and specifications dated 3/24/09 ^+.'�, �, 'R* �,:�.,,� •./,•', it w r pis � aLn•� Imp } . l41y1 a y lfi� e6Feauau� d�.�q4 I certify that the permanent runoff control structure Bioretention Cell #2 for Robinhood Manor Apartment Homes as recorded in PB 56, PG 424 in the office of the Guilford County Register of Reeds has been completed in conformance with the approved plans and specifications dated 3/24109 oat�f! o 41 41 � u�� �3 /\ I.iit� L •i L��f A e �+ 024442 a m a e •N�Yfiio o a QJf�i�0� /tCQ is l K%Isodates,PLLC Engineer's Certification of Stormwater Control Completion I certify, to the best of my knowledge, information and belief, that the permanent stormwater control labeled as Bioretention Cell 94 for Robinhood Court (formerly Robinhood Manor) Apartment Homes as recorded in PB 57, PG 127 in the Office of the Forsyth County Registrar of Deeds has been completed in conformance with the plans and specifications approved by NCDENR DWQ on April 14, 2009. ,.�rac�e.0 P.se Seal here: A � (lil" t.- �4a 41 EAL p � u 'a 125 S. Elm Street, Suite 606 * Greensboro, North Carolina 27401 • phone: 336-310-9722 • web: www.wsaaeno.com State Stormwater Permit Permit No. SVV4090401 Robinhood Court Apartment Homes RECEIVED Stormwater Permit No, SVV4090401 N.C.Dept. of ENR Forsyth CountyFEB 23 2012 EN61-4ECk 'S Winston-Salem Certification I Regional office 1, CPI s �- 7Xv'3Y as a duly registered in the State of North Carolina, having been authorized to observe Brio Ica weekly/ full time) the construction of the project, (Project Name) far A*_4#_� <_ovo 49—: Am_6t, It L (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: * l9a. Vattr A /F Ate! JFve 9 V'67WI-47.,04 -Ab7 Au y , r -IE6E74T►� .TlStEcF A-17S MOq'E 6CC,a ?W'f e-o AM7 A= 'tW U"-A& 1/r-q Signature Registration Number Date 21ZL l I -- Page 7 of 8 State Stormwater Permit Permit No. SW4090401 Certification Requirements: 1. The drainage area to the system contains approximately the permitted acreage. `'DES 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,rdn6ff is directed into`-the-syste.rn Y[5 5. The outlet/bypass structure elevations are per the approved plan. 6. The outlet structure is located per the approved pian's. 7. Trash rack is provided on the outlet/bypass structure. All slopes are grassed with permanent vegetation, per the vegetation plan. 9. Vegetated slopes are no steeper than 3:1. S 10. The inlets are located per the approved plans and do not cause short- circuiting of, the'system. 'Tlie permitted amouHfs'of surface area'andlor volumeehave'been' provided. 12. Required drawdown devices are correctly sized per the approved plans. 13. All required design depths are provided. ?ES It 14. All .required parts of the system are provided, such as vegetated shelf, underdrains, vegetative cover, and a forebay.' 15. The'.,required system,•dimensions are provided per the,approved plans. Submit to: NCDENR=DWQ Winston-Salem Regional Office 585 Waughtown Street Winston-Salem, NC 27107 Page 8 of 8