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HomeMy WebLinkAboutSW8011119_Historical File_20111012 Arai MENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary October 12, 2011 The Village at Mayfaire Condominium Owner's Association do Ken Mickelson or current Board President 555 Grande Manor Court, #301 Wilmington, NC 28405 Subject: Stormwater Management Permit No. SW8 011119 Mod The Village at Mayfaire High Density Commercial Alternative Infiltration Project New Hanover County Dear Mr. Mickelson: The Wilmington Regional Office received a complete, modified Stormwater Management Permit Application for The Village at Mayfaire on October 10, 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. We are forwarding modified Permit No. SW8 011119 dated October 12, 2011, for the construction, operation and maintenance of the BMP's and built-upon areas associated with The Village at Mayfaire. This modification revises Section III of the permit, the Monitoring Requirements. A new sampling location map has been approved and is added to the plans previously approved on December 4, 2002, which remain in effect. This permit shall be effective from the date of issuance until December 4, 2012, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 150B of the North Carolina General Statutes, and must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee I required) and/or the details of the filing process at: 6714 Mail Service Center, Raleigh, NC 27699-6714, or Telephone 919-431-3000 or visit their website at www.ncoah.com. If you have any questions, or need additional information concerning this matter, please contact Linda Lewis at (910) 796-7215. Sincerely, %/Ltt' J - ,��: t 7 Cole'n Sullins, Director Division of Water Quality GDS/arl: S:1WQS1Stormwater\Permits& Projects120011011119 HD12011 10 permit 011119 cc: Todd Edmiston, Property Manager, CAMS L sr r)r Sr e e u ems, , PE New Hanover County Building Inspections City of Wilmington Public Services Beth E. Wetherill, New Hanover County Engineering Wilmington Regional Office Stormwater File Wilmington Regional Office 127 Cardinal Drive Extension,Wilmington,North Carolina 28405 One Phone:910-796-7215 FAX:910-350-2004 I Customer Service:1-877-623-6748 NorthCarolina Internet www.ncwaterquality.org Naturally An Equal Opportunity\Affirmative Action Employer `K State Stormwater Management Systems Permit No. SW8 011119 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 The Village at Mayfaire Condominium Owners Association The Village at Mayfaire 6814 Mayfaire Club Drive, Wilmington, New Hanover County FOR THE construction, operation and maintenance of an alternative high density stormwater management system consisting of three (3) wet detention storage ponds, each with a pumped discharge to a common infiltration basin, in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules`) and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until December 4, 2012, 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 1.9 and 1.10 of this permit. The wet ponds labeled 1, 2 and 3, have been designed to provide treatment for the runoff from 104,416 sf; 179,580 sf; and 321,364 sf of built-upon area, respectively. 3. The flow from the orifice of the wet pond must discharge into a spreader swale designed to force a sheet flow runoff condition into the bermed infiltration area. 4. The orifice size has been designed to allow the wet ponds to draw down in 4 days therefore the infiltration basin has been designed to store and infiltrate a maximum volume per day equivalent to the total volume pumped to the basin from each pond within the first 24 hours of a 1.5" rain event. 5. The tract and each BMP will be limited to the amount of built-upon area indicated in Sections 1.2. 1.9 and 1.10 of this permit, and per the approved plans. The maximum total built-upon area allowed on the site is 605,360 square feet. Page 2 of 7 State Stormwater Management Systems Permit No. SW8 011119• 6. All overflows from the wet ponds that is in excess of the 1.5" design storm must flow overland through a 50' vegetated filter. 7. The runoff from all built-upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system, as shown on the approved drainage area plan. 8. A portion of this development is within the designated 575'AEC. The overall percent impervious within the AEC cannot exceed 25%. For the entire Mayfaire development, the area of the AEC is 59.28 acres, and the proposed built-upon area within the 575' AEC is 14.5 acres. 9. The following design criteria have been approved for the infiltration basin, and must be maintained at design condition: a. Drainage Area, acres: 26.85 Onsite, ft : 1,169,586 Offsite, ft2: 0 b. Total Impervious Surfaces, ft2: 605,360 c. Design Storm, inches: 1.5 d. Basin Depth, feet: 1.0 e. Bottom Elevation, FMSL: 27.0 f. 24 hour volume pumped from ponds, ft3: 37,219 g. Provided Volume, ft3: 37,219 h. Provided Bottom Surface Area, ft2: 33,827 i. Temporary Storage Elevation, FMSL: 28.0 j. Type of Soil: Murville k. SHWT Elevation, fmsl: 25.0 I. Expected infiltration rate, in/hr: 1.0 m. Time to draw down 1.5" volume, days: 5 n. Receiving Stream/River Basin: Howe Creek/ CPF24 o. Stream Index#: 18-87-23 p. Stream Classification: "SA ORW" 10. The following design criteria have been approved for the three wet detention storage ponds and must be maintained at design condition: Pond Number: 1 2 3 a. Drainage Area, a res: 4.6 9.7 12.55 Onsite, f�: 200,000 423,000 547,000 Offsite, ft2: 0 0 0 b. Built-upon area, ft2: 104,416 179,580 321,364 c. Design Storm, inches: 1.5 1.5 1.5 d. Pond Design Depth, ft: 4.0 4.0 4.5 e. Permanent Pool elevation, FMSL: 25.0 25.5 25.0 f. Permanent Pool Surface Area, ft2: 11,621 23,510 28,621 g. Provided Storage Volume, ft3: 19,163 30,228 39,729 h. Excess Storage Provided, ft3: 65% 29% 39% i. Controlling Orifice pipe diameter: 1.75" 2.5" 2.75" j. Receiving Stream/River Basin: Howe Creek/CPF k. Stream Index Number: 18-87-23 I. Stream Classification: "SA ORW" II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built-upon surface. Page 3 of 7 State Stormwater Management Systems Permit No. SW8 011119 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. c. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. A decorative spray fountain may be used in the permitted wet ponds because the ponds act only as storage devices and do not provide treatment. The decorative spray fountain should be sized for the pond, and located per 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. 6. The project's built-upon areas and the stormwater facilities shall be constructed in accordance with the conditions of this permit, the approved plans, the specifications and other supporting documentation. 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. The permittee must maintain compliance with the maximum allowed built-upon area and ensure that the runoff from all the built-upon is directed into the permitted system. Page 4 of 7 State Stormwater Management Systems Permit No. SW8 011119• 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. Redesign or addition to the approved amount of built-upon area or to the drainage area. c. Further subdivision, acquisition, or sale 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. d. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. e. The development of any permitted future areas shown on the approved plans. 11. Prior to the sale or lease of any portion of the property, the permittee shall ensure that access to the stormwater facilities is provided by reserving and recording an easement to the stormwater facilities for access and maintenance. 12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. MONITORING REQUIREMENTS 1. "BMP" means the entire approved Best Management Practice, including any combination of individual practices, such as a wet pond and an infiltration area, the outlet structure, level spreaders and vegetated filter strips. 2. Analytical monitoring of the BMP's shall be conducted quarterly. First flush inflow and outflow grab samples shall be obtained at the location(s) shown on the approved sample location site map. 3. BMP samples shall consist of a grab sample of the first flush inflow at the end of the force main where it delivers the pumped runoff from the wet ponds into the infiltration basin, and the infiltrated outflow from the monitoring wells. The first flush inflow sample window is within the first 30 minutes of a discernable inflow from a representative storm event. The discharge outflow sample window is at least 1 day after the end of a representative storm event, but no later than 3 days after the end of the representative storm event. Samples must be collected in each quarter of each year of the permit for a total of 8 representative sample events. 4. A quarterly physical, visual inspection of the system during a 1.5" design storm rain event shall be conducted and may or may not be concurrent with the grab sample collection. The purpose of the inspection is to evaluate and document the system's ability to meet the permit conditions to contain the design storm without discharging. For appropriate system evaluation, the beginning water level in the storage ponds should be close to the Permanent Pool Elevation. Page 5 of 7 State Stormwater Management Systems Permit No. SW8 011119 5. Monitoring parameters shall include, at a minimum, the below-listed items, a. - d. Additional monitoring parameters may be required later to address water quality issues in the affected area. a. Total Suspended Solids b. TKN as N c. Total P d. TPH Gasoline Range 6. The permittee shall split samples with the DWQ for at least one sample event per year, at the discretion of the Division. The permittee shall make arrangements with Regional Office staff to deliver the samples to a certified laboratory of the State's choosing. 7. All samples shall be collected from a representative storm event. A representative storm event is an event that measures greater than 0.1 inches of rainfall and that is preceded by at least 72 hours during which no storm event measuring greater than 0.1 inches has occurred. A single storm event may contain up to 10 consecutive hours of no precipitation. For example, if it rains for 2 hours without producing any collectible discharge, and then stops, a sample may be collected if a rain producing discharge begins again within the next 10 hours. The storm event date, total rainfall and duration must be recorded for both the storm event prior to the sampled event and the sampled event. 8. All samples shall be delivered to a State certified laboratory for analysis. All sampling results shall be submitted to NCDENR within 30 days of receiving the laboratory results. All submitted data shall reference the project name, location, and permit number. Results must be submitted to: NCDENR-DWQ Stormwater and General Permits Unit 1617 Mail Service Center Raleigh, NC 27699-1617 A copy of the lab sampling results shall also be submitted to: NCDENR-DWQ Wilmington Regional Office 127 Cardinal Drive Extension Wilmington, NC 28405. 9. The permittee may petition DWQ to have monitoring requirements modified, reduced, or eliminated if a minimum total of 8 representative storms have been sampled for each BMP. A facility may opt to monitor more frequently than quarterly as long as the data is collected over the course of at least one full year with samples collected in each season. A request to modify, reduce or eliminate monitoring requirements shall be evaluated on a case-by-case basis. 10. The permittee shall submit and maintain as part of the permit documents, a monitoring station site map designating all sampling point locations as agreed to by the permittee and the Division. IV. GENERAL CONDITIONS 1. 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. Page 6 of 7 State Stormwater Management Systems Permit No. SW8 011119• 2. This permit is not transferable to any person or entity unless and until a formal permit transfer request is submitted to and approved by the Director. At least 30 days prior to a change of ownership, or a name change of the Permittee or of the project, or a mailing address change, the permittee shall submit a completed and signed Name/Ownership Change Form to the Division of Water Quality accompanied by the appropriate documentation as listed on the form. The approval of this request will be considered on its merits and may or may not be approved. 3. The permittee is responsible for compliance with all terms and conditions of this permit until such time as the Division approves the permit transfer request. Neither the sale of the project area, in whole or in part, nor the conveyance of common area to a third party constitutes an approved permit transfer. 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) which have jurisdiction. 5. In the event that the facilities fail to perform satisfactorily 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 may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 8. Unless specified elsewhere, permanent seeding requirements for the stormwater 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. A copy of this permit and the approved plans and specifications shall be maintained on file by the Permittee at all times. 10. The permittee shall submit a permit renewal application at least 180 days prior to the expiration date of this permit. The renewal request must include the completed renewal application form, fee and applicable documentation. Permit modified and reissued this the 12th day of October 2011. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION SC—CV 04 olee H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Page 7 of 7 DWQ USE ONLY — e Date Received Fee Paid Permit Number -/7 2o// a � ' /67/ _15-X) Q//// Applicable Rules: ❑Coastal SW-1995 ❑Coastal SW-2008 0 Ph II-Post Construction (select all that apply) ❑Non-Coastal SW-HQW/ORW Waters ❑Universal Stormwater Management Plan 0 Other WQ Mgmt Plan: State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Project Name(subdivision,facility,or establishment name-should be consistent with project name on plans, specifications,letters,operation and maintenance agreements,etc.): The Village at Mayfaire 2. Location of Project(street address): 6814 Mayfaire Club Drive City:Wilmington County:New Hanover Zip:28405 3. Directions to project(from nearest major intersection): Site is 1.51 miles north of intersection of Eastwood Road and Military Cutoff Road on west side of Military Cutoff Road. 4. Latitude:34°14'30"N Longitude:77°49'40"W of the main entrance to the project. II. PERMIT INFORMATION: 1.a.Specify whether project is(check one): ['New ®Modification b.If this application is being submitted as the result of a modification to an existing permit,list the existing permit numberSW8 011119 ,its issue date(if known)December 7,2007 ,and the status of construction: ONot Started ❑Partially Completed* ®Completed* *provide a designer's certification 2. Specify the type of project(check one): ['Low Density ®High Density ['Drains to an Offsite Stormwater System ['Other 3. If this application is being submitted as the result of a previously returned application or a letter from DWQ requesting a state stormwater management permit application,list the stormwater project number,if assigned, and the previous name of the project,if different than currently proposed, 4.a.Additional Project Requirements(check applicable blanks;information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ['Sedimentation/Erosion Control: ac of Disturbed Area ❑NPDES Industrial Stormwater 0404/401 Permit:Proposed Impacts b.If any of these permits have already been acquired please provide the Project Name,Project/Permit Number, issue date and the type of each permit: RECETVED MAR 0 8 1011 BY: Form SWU-101 Version 07Jun2010 Page 1 of 6 III. CONTACT INFORMATION 1.a.Print Applicant/Signing Official's name and title(specifically the developer,property owner,lessee, designated government official,individual,etc.who owns the project): Applicant/Organization:The Village at Mayfaire Condominium Owners Association Signing Official&Title:Ken Mickelson,Board President b.Contact information for person listed in item la above: Street Address:555 GrandbManor Court,#301 City:Wilmington State:NC Zip:28405 Mailing Address(if applicable) ^�^Cams ti n Milit City:Wilmington State:Ne— Zip:2 5 Phone: (-9+e- (7)-256-2921 31a—S(,4'3 Fax: (910 ) 94 Email:tedmintorrieem c.Please check the appropriate box.The applicant listed above is: 1 The property owner(Skip to Contact Information,item 3a) ❑Lessee*(Attach a copy of the lease agreement and complete Contact Information,item 2a and 2b below) ❑Purchaser*(Attach a copy of the pending sales agreement and complete Contact Information,item 2a and 2b below) ❑Developer*(Complete Contact Information,item 2a and 2b below.) 2.a.Print Property Owner's name and title below,if you are the lessee,purchaser or developer. (This is the person who owns the property that the project is located on): Property Owner/Organization: Signing Official&Title: b.Contact information for person listed in item 2a above: Street Address: City: State: 'CEIVJ Mailing Address(if applicable): MHtt o $ 2011 City: State: Zip: Phone: ( ) Fax: ( ) BY: Email: 3.a. (Optional)Print the name and title of another contact such as the project's construction supervisor or other person who can answer questions about the project: Other Contact Person/Organization:Community Association Management Specialists(CAMS) Signing Official&Title:Todd Edmiston,Property Manager b.Contact information for person listed in item 3a above: Mailing Address:1630 Military Cutoff Road,Suite 108 City:Wilmington State:NC Zip:28403 Form SWU-101 Version 07Jun2010 Page 2 of 7 Phone: (910 ) 256-2021 Fax: (910 ) 256-3794 Email:tedmiston@camsmgt.com 4. Local jurisdiction for building permits:New Hanover County Point of Contact: Phone#: (910 ) 798-7151 IV. PROJECT INFORMATION 1. In the space provided below,briefly summarize how the stormwater runoff will be treated. In the permitted and constructed system,runoff is collected in piped system and directed to three wet detention ponds.The 1.5"design storage volume from the ponds is pumped to an infiltration basin The modification is for changes to the permitted water quality monitoring requirements. 2.a.If claiming vested rights,identify the supporting documents provided and the date they were approved: ❑Approval of a Site Specific Development Plan or PUDApproval Date: ❑Valid Building Permit Issued Date: ❑Other: Date: b.If claiming vested rights,identify the regulation(s)the project has been designed in accordance with: ❑Coastal SW—1995 ❑Ph II—Post Construction 3. Stormwater runoff from this project drains to the River basin. 4. Total Property Area:26.85 acres 5. Total Coastal Wetlands Area:0 acres 6. Total Surface Water Area:0 acres 7. Total Property Area(4)—Total Coastal Wetlands Area(5)—Total Surface Water Area(6)=Total Project Area`: 26.85 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 High Water(NHW)line or Mean High Water (MHW)line,and coastal wetlands landward from the NHW(or MHW)line. The resultant project area is used to calculate overall percent built upon area(B LIA). Non-coastal wetlands landward of the NHW(or MHW)line may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area /Total Project Area)X 100 =52 9. How many drainage areas does the project have?3(For high density,count 1 for each proposed engineered Stormwater BMP. For low density and other projects,use 1 for the whole property area) 10. Complete the following information for each drainage area identified in Project Information item 9. If there are more than four drainage areas in the project,attach an additional sheet with the information for each area provided in the same format as below. MAR 08 2011 BY. Form SWU-101 Version 07Jun2010 Page 3 of 7 • Basin Information Drainage Area 1 Drainage Area 2 Drainage Area 3 Drainage Area_ Receiving Stream Name Howe Creek Howe Creek Howe Creek Stream Class * SA ORW SA ORW SA ORW Stream Index Number* 18-87-23 18-87-23 18-87-23 Total Drainage Area(sf) 200,000 423,000 547,000 On-site Drainage Area(sf) 200,000 423,000 547,000 Off-site Drainage Area(sf) 0 0 0 Proposed Impervious Area**(sf) 104,400 179,600 321,400 Impervious Area**(total) 52 42 59 Impervious"Surface Area Drainage Area_ Drainage Area— Drainage Area- Drainage Area— On-site Buildings/Lots(sf) 51,500 99,300 174,000 On-site Streets (sf) 20,400 40,700 15,700 On-site Parking (sf) 25,000 33,900 73,400 On-site Sidewalks (sf) 500 400 11,100 Other on-site (sf) 1,300 0 47,200 Future(sf) 0 0 Off-site (sf) 5,800 5,300 0 Existing BUA***(sf) 0 0 0 Total (sf): 104,400 179,600 321,400 * Stream Class and Index Number can be determined at: http://portal.ncdenr.org/web/wq/ps/esu/classifications ** 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 BLIA that will remain after development.Do not report any existing BLIA 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.From previous permit applications Proiects in Union County: Contact DWQ Central Office ice staff to check if the project is located within a Threatened& Endangered Species watershed that may be subject to more stringent stormwater requirements as per NCAC 02B.0600. RECEIVED V. SUPPLEMENT AND O&M FORMS The applicable state stormwater management permit supplement and operation and maintk4n!?O )fo 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. BY: VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality(DWQ). A complete package includes all of the items listed below. A detailed application instruction sheet and BMP checklists are available from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms docs. 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/maps.) 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 docs. gals 1. Original and one copy of the Stormwater Management Permit Application Form. 04 2. Original and one copy of the signed and notarized Deed Restrictions&Protective Covenants N 1 A Form.(if required as per Part VII below) 3. Original of the applicable Supplement Form(s)(sealed,signed and dated)and O&M at)/a agreement(s)for each BMP. 4. Permit application processing fee of$505 payable to NCDENR. (For an Express review,refer to '6- 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 B. A detailed narrative(one to two pages)describing the stormwater treatment/management for N 14 the project. This is required in addition to the brief summary provided in the Project Information,item 1. 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the N IA receiving stream drains to class SA waters within 1 mile of the site boundary,include the 1 mile radius on the map. 7. Sealed,signed and dated calculations. N/A 8. Two sets of plans folded to 8.5"x 14"(sealed,signed,&dated),including: A/ lF} a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. e. North arrow. f. Scale. g. Revision number and dates. h. Identify all surface waters on the plans by delineating the normal pool elevation of impounded structures,the banks of streams and rivers,the MHW or NHW line of tidal waters,and any coastal wetlands landward of the MHW or NHW lines. • Delineate the vegetated buffer landward from the normal pool elevation of impounded structures,the banks of streams or rivers,and the MHW(or NHW)of tidal waters. i. Dimensioned property/project boundary with bearings&distances. j. Site Layout with all BUA identified and dimensioned. k. Existing contours,proposed contours,spot elevations,finished floor elevations. 1. Details of roads,drainage features,collection systems,and stormwater control measures. m.Wetlands delineated,or a note on the plans that none exist. (Must be delineated by a qualified person. Provide documentation of qualifications and identify the person who made the determination on the plans. n. Existing drainage(including off-site),drainage easements,pipe sizes,runoff calculations. o. Drainage areas delineated(included in the main set of plans,not as a separate document). p. Vegetated buffers(where required). 9. Copy of any applicable soils report with the associated SHWT elevations(Please identify A)ha elevations in addition to depths)as well as a map of the boring locations with the existing elevations and boring logs.Include an 8.5"x11"copy of the NRCS County Soils map with the project area clearly delineated. For projects with infiltration BMPs,the report should also include the soil type,expected infiltration rate,and the method of determining the infiltration rate. (Infiltration Devices submitted to WiRO:Schedule a site visit for DWQ to verify the SHWT prior to submittal,(910) 796-7378.) 10. A copy of the most current property deed.Deed book: Page No: IV IA 11. For corporations and limited liability corporations(LLC):Provide documentation from the NC Al IA Secretary of State or other official documentation,which supports the titles and positions held by the persons listed in Contact Information,item la,2a,and/or 3a per NCAC 2H.1003(e).The corporation or LLC must be listed as an active corporation in good standing with the NC Secretary of State,otherwise the application will be returned. http://www.secretary.state.nc.us/Corporations/CSearch.aspx RECEIVED VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS MAR 0 8 2011 For all subdivisions,outparcels,and future development,the appropriate property strictions and protective covenants are required to be recorded prior to the sale of any lot. If lot sizes vary sig or the roposed BUA allocations vary,a table listing each lot number,lot size,and the allowable built-upon area mus ed as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and protective covenants forms can be downloaded from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms does.Download the latest versions for each submittal. In the instances where the applicant is different than the property owner,it is the responsibility of the property owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring that the deed restrictions are recorded. By the notarized signature(s)below,the permit holder(s)certify that the recorded property restrictions and protective covenants for this project,if required,shall include all the items required in the permit and listed on the forms available on the website,that the covenants will be binding on all parties and persons claiming under them,that they will run with the land,that the required covenants cannot be changed or deleted without concurrence from the NC DWQ,and that they will be recorded prior to the sale of any lot. Form SWU-101 Version 07Jun2010 Page 5 of 7 VIII. CONSULTANT INFORMATION AND AUTHORIZATION Applicant: Complete this section if you wish to designate authority to another individual and/or firm(such as a consulting engineer and/or firm)so that they may provide information on your behalf for this project(such as addressing requests for additional information). Consulting Engineer:C.Lawrence Sneeden,Jr.PE Consulting Firm:N/A Mailing Address:6217 Head Road City:Wilmington State:NC Zip:28409 Phone: (610 ) 520-1835 Fax: (910 ) 805-9670 Email:lsneeden@coastalstormwater.com IX. PROPERTY OWNER AUTHORIZATION(if Contact Information,item 2 has been filled out,complete this N/A section) I,(print or type name of person listed in Contact Information,item 2a) ,certify that I own the property identified in this permit application,and thus give permission to(print or type name of person listed in Contact Information,item la) with(print or type name of organization listed in Contact Information,item la) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal,which indicates the party responsible for the operation and maintenance of the stormwater system. As the legal property owner I acknowledge,understand,and agree by my signature below,that if my designated agent(entity listed in Contact Information,item 1)dissolves their company and/or cancels or defaults on their lease agreement,or pending sale,responsibility for compliance with the DWQ Stormwater permit reverts back to me,the property owner.As the property owner,it is my responsibility to notify DWQ immediately and submit a completed Name/Ownership Change Form within 30 days;otherwise I will be operating a stormwater treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to$25,000 per day,pursuant to NCGS 143-215.6. Signature: Date: 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 MAR 0 8 2011 13 Form SWU-101 Version 07Jun2010 Page 6 of 7 , , .:X. APPLICANT'S CERTIFICATION I,?print or type name of person listed in Contact Information,item 1a)Ken Mickelson , certify that the information included on this permit application form is,to the best of my knowledge,correct and that the project will be constructed in conformance with the approved plans,that the required deed restrictions and protective covenants will be recorded,and that the proposed project complies with the requirements of the applicable stormwater rules under 15A NCAC 2H.1000,SL 2006-246(Ph.II-Post Construction)or SL 2008-211. • Signature: 4 'Lsc � � Date: /$7 z L f. 2-0 a I,�.1 ff ,a Notary Public for the State of ItaltbeeD2ZIALcounty of do hereby certify that' f _` personally appeared before me this i day of ttkNath , elm 1 ,and acknowledge the due execution of the application for a stormwater permit. Witness my hand and official seal, E0 i ...40S/4.....44—.0..2..XV*4‘..P .`� `• ;4►q�i�<: SEAL ! ? �,� .. a My commission expires ‘.... 1^10 • G` x `,,' i ° 'ij,'s,i"tY. RECEIVED MAR 0 8 2011 BX: Form SWU-101 Version 07Jun2010 Page 7 of 7 REC'D OCT 1 0 2011 LETTER OF TRANSMITTAL Coastal Stormwater Services, Inc. Project Name:Village at Mayfaire 6217 Head Road Wilmington, NC 28409 Project No SW8 011119 910-520-1835 TO:NCDENR-DWQ Attention: Linda Lewis WiRO Date: October 9,2011 We are Sending: =Plans nChange Order n Enclosed =Proposal =Computations 0 Under separate cover via =Literature nSpecifications ElCopy of Letter =X Other Water Quality Sampling Map Copies Dated Description These are Being Sent: = For Your Approval n Approved as Noted Corrected and Returned =X For Your Use = Approved as Submitted C As Requested For Your Review and Comment Approved as Changed C n For Your Signature Ei Returned for Corrections I I For Bids Due El Returned After Loan to Us By: ❑ Courier INTO) Federal Express n Mail piOther Remarks: Z.�,, $1: Signed&Date �4 4--r J4 t A-deg. /D/O, ATA NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary September 12, 2011 Ken Mickelson, or Current Board President The Village at Mayfaire Condominium Owners Association 555 Grand Manor Court#301 Wilmington, NC 28405 Subject: Request for Additional Information Stormwater Project No. SW8 011119 The Village at Mayfaire . New Hanover County Dear Mr. Mickelson, or Current Board President: The Wilmington Regional Office received a request to modify the State Stormwater Management Permit for The Village at Mayfaire on March 8, 2011. This modification is for a change in the monitoring parameters, requirements and sample locations. Additional information was requested via email on May 11, 2011, to your consultant, Mr. Larry Sneeden, P.E. (copy enclosed). To date, this information has not been provided and the application is still incomplete. • The information requested on May 11, 2011, is for the submittal of 2 copies of the proposed new sample locations and monitoring stations map, showing the inflow sample locations, (where the force main dumps into the infiltration basin) and the outflow sample locations at the proposed new monitoring well locations. Please note that this request for additional information is in response to a preliminary review. The requested information should be received in this Office prior to October 12, 2011, or the application will be.returned as incomplete. Please note that the existing permit conditions remain in effect until the modification is approved. Your current permit requires the submission of quarterly monitoring reports. While this modification remains in review, you must continue to submit the required monitoring reports as required by the current permit conditions. Potential enforcement action may be pursued if the required monitoring is not performed or if the requested information is not provided by the due date. Please also find enclosed a copy of the September 9, 2011, letter requesting that you submit a permit renewal application for the project. This letter was addressed to the Condominium Owners Association in care of the management company, CAMS. If you need additional time to submit the information, please mail, email or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. Wilmington Regional Office 127 Cardinal Drive Extension,Wilmington,North Carolina 28405 One Phone:910-796-72151 FAX 910-350-20041 Customer Service:1-877-823-6748 No Carolina Internet www.ncwaterquality.org $uraJ/ bt An Equal Opportunity 1 Affirmative Action Employer Mr. Mickelson September 12, 2011 Stormwater Application No. SW8 011119 Mod. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 796-7215 or email me at linda.lewisAncdenr.gov. Sincerely, Linda Lewis Environmental Engineer III GDS/arl: S:\wqs\stormwater\permits &projects120011011119 HD12011 09 Addinfo 01-1119 CC: Larry Sneeden, P.E., Coastal Stormwater Services, Inc. Wilmington Regional Office Stormwater File Page 2 of 2 AVA NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H.Sullins Dee Freeman Governor Director Secretary September 9,2011 Ms.Jessica L.Riffle,President The Village at Mayfaire Condominium Owners Association do CAMS 1630 Military Cutoff Road,Suite 108 Wilmington,NC 28403 Subject: PERMIT RENEWAL REQUEST Stormwater Permit No.SW8 011119 The Village at Mayfaire New Hanover County Dear Ms.Riffle: The Division of Water Quality issued a Coastal Stormwater Management Permit,Number SW8 011119 to The Village at Mayfaire, LLC for a High Density project on December 4,2002,with an Ownership Change to The Village at Mayfaire Condominium Owners Association on December 7,2007. This permit expires on December 4,2012.Per 15A NCAC 2H.1003(h)(the stomiwater rules),applications for permit renewals shall be submitted 180 days prior to the expiration of a permit and must be accompanied by a processing fee,which is currently set at$505.00. If this is still an active project please complete and submit the enclosed renewal application prior to June 4,2012. If this project has not been constructed and a permit is no longer needed,please submit a request to have the permit rescinded. If you have sold the project please provide the name, mailing address and phone number of the person or entity that is now responsible for this permit Enclosed is a form for change of ownership,which should be completed and submitted if the property has changed hands. Your permit requires that upon completion of construction and prior to operation of the permitted stormwater treatment system, a certification of completion be submitted to the Division from an appropriate designer for the type of system installed. This is to certify that the permitted facility has been installed in accordance with the permit,the approved plans,specifications and supporting documentation.If you have not already provided a Designer's Certification to our office,please include a copy with your permit renewal request and processing fee.A copy of the certification form is enclosed for your convenience. You should be aware that failure to provide the Designer's Certification and the operation of a stormwater treatment facility without a valid permit,are violations of NC General Statute 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of up to$10,000 per day. If you have any questions,please feel free to contact David Cox at(910)796-7318. Si rely, ::(/142(-4eL CD 5C4S37( Georgette Scott Stormwater Supervisor GDS/dwc S:1WQS\Stormwater\Permits&Projects12001\HD 1201109 req_ren 011119 cc: Wilmington Regional Office File end. Wilmington Regional Office 127 Cardin!Drive Extension,Wilmington,North Carolina 28405 Phone: 910-796-72151 FAX:910-350-20041 Customer Service:1-877-623-6748 e Internet:www,ncwaterquality.org NorthCarolina ,7Vaturallm An Equal Opportunity 1 Affirmative Action Employer Lewis,Linda • From: Lewis,Linda Sent: Wednesday, May 11, 2011 10:00 AM To: 'Larry Sneeden'; 'Larry Sneeden' Subject: SW8 011119 Attachments: BMP.pdf Larry- This is a draft of the new monitoring requirements that will go into the permit. I will also be adding a requirement for visual observation of the system during a 1.5" rain event, with the rain starting when the storage ponds are at the PPE and begin pumping to the infiltration basin immediately, to confirm that the system does not discharge to surface waters during the 1.5" event. I need 2 copies of a proposed sample location/monitoring station map from you, showing the inflow sample location(s), which would be the point(s) where the force main dumps into the infiltration basin, and the outflow sample location(s) at the proposed new monitoring well location(s). Thanks, Linda 1 Rat 'Op 1 2 2011 LETTER OF TRANSMITTAL Coastal Stormwater Services, Inc. Project Name:Village at Mayfaire 6217 Head Road Wilmington, NC 28409 Project No SW8 011119 910-520-1835 660 FO / /f / 2 Mom. TO: NCDENR-DWQ Attention: Linda Lewis /:1L) WiRO ( Date: April 12,2011 We are Sending: 1Plans =Change Order n Enclosed Proposal I—(Computations n Under separate cover via =Literature Specifications t(. CEIVED n Copy of Letter n Other Application Fee Check for$505.00 Copies Dated Description APR 1 2 2011 BY: These are Being Sent: Q For Your Approval i l Approved as Noted El Corrected and Returned =X For Your Use = Approved as Submitted As Requested n For Your Review and Comment 0 Approved as Changed = n For Your Signature = Returned for Corrections n For Bids Due 0 Returned After Loan to Us By: E Courier = Federal Express = Mail nOther Remarks: Signed&Date �•t� Lewis,Linda From: Larry Sneeden [Isneeden ct Dcoastalstormwater.com] Sent: Friday,April 01, 2011 9:03 AM To: Lewis,Linda Subject: FW: Mayfaire Sampling Protocol Linda, Following is your e-mail on the sampling program at Village of Mayfaire. Larry Sneeden C. Lawrence Sneeden,Jr. PE Coastal Stormwater Services, Inc. 6217 Head Road Wilmington, NC 28409 910-520-1835 Cell From: Lewis,Linda [mailto:linda.lewis@ncdenr.gov] Sent: Monday,August 09, 2010 12:15 PM To: tammy@tss-nc.com; Larry Sneeden Cc: Scott, Georgette; Bennett, Bradley Subject: RE: Mayfaire Sampling Protocol Tammy and Larry: The sampling for Mayfaire has finally been worked out. It's a little different than what we were originally planning. I discussed the situation at length with our NPDES and ambient monitoring staff, supervisors and Central office staff. We all agreed that sampling the individual BMP bypassed runoff was probably not going to get us what we wanted. The original intent of the sampling was to make sure the BMP's were functioning as designed to protect Howe Creek. The systems for The Village and for the Town Center are similarly designed. They both are required to capture and treat the design storm without discharging to surface waters. They both utilize a wet pond for storage of the design storm, which then directs that design storm runoff to an infiltration area and allows excess design storm to overflow through a vegetated filter. The difference is that The Village uses pumps to get from the pond to the infiltration area to the bypass and the Town Center uses gravity. The quarterly sampling reports were reviewed by our ambient monitoring and NPDES staff people. As a result, we are recommending quarterly sampling for at least 2 years. 1. Samples will be pulled for the first flush runoff into each wet pond storage area either at the last catch basin, or the forebay, or at the end of the forcemain where it dumps into the infiltration basin (The Village)—whichever is most convenient and accessible. This will allow us to know the quality of the incoming runoff before it gets to the infiltration basin. 2. We are also recommending the installation of a monitoring well within each permitted infiltration area. Depending on the size of the infiltration area, more than 1 well may be needed. Samples of the water that is infiltrating will be pulled from the wells and analyzed to allow us to know the quality of the water that is being infiltrated. i 3. We are recommending the elimination of the fecal coliform monitoring only if more dog "pooper- scooper" bag and disposal stations are added at strategic points where the dog-walkers will have better access to them. 4. We are recommending that the upstream and downstream sampling of Howe Creek continue (Town Center only), 5. We are eliminating the requirement to sample the ponds that drain to Bradley Creek (Town Center). Sampling will be for TSS, hydrocarbons, nitrogen and phosphorous. This should be less costly to the permittee than the current protocol. At the end of 2 years the permittee can again request to eliminate the sampling. Depending on the results, the Division may or may not elect to eliminate. A request to modify the permit to change the monitoring requirements will require a $505.00 fee and a new application. No new supplements or new signed O&M's will be required —the current ones will be good. Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: tammy@tss-nc.com [mailto:tammy@tss-nc.com] Sent: Monday, August 09, 2010 10:19 AM To: Lewis,Linda Subject: RE: Mayfaire Sampling Protocol Hi Linda, Hope you're doing well. Would you mind sharing the decision in brief via email or phone? Thanks, Tammy Original Message Subject: RE: Mayfaire Sampling Protocol From: "Lewis,Linda" <linda.lewisCa ncdenr.gov> Date: Fri, August 06, 2010 11:15 am To: Scott Mitchell <scottatss-nc.com> Cc: "tammyCahtss-nc.com" <tammyCa�tss-nc.com>, "Scott, Georgette" <g eo rg ette.scottCa n cd e n r.g ov> 2 Yes, I'm planning to draft a response to the permittees of both The Village and the Town Center regarding what we've decided. Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington,NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Scott Mitchell [mailto:scottatss-nc.com] Sent: Friday,August 06, 2010 10:24 AM To: Lewis,Linda Cc: tammyc tss-nc.com Subject: Mayfaire Sampling Protocol Linda, I spoke with Linda Willis a few minutes ago and she indicated that you and your staff have made a decision regarding our proposed modifications to the stormwater sampling protocol for Mayfaire. Can you provide me with a summary of the decision so we can begin planning for the modifications? Thanks, Scott Mitchell,PE,LSS Total Stormwater Solutions,Inc. PO Box 341 Fuquay-Varina,NC 27526 Scott(a,TSS-NC.corn www.TSS-NC.com 919-557-4682 Office 919-557-4683 Fax 919-669-0329 Mobile 3 C. Lawrence Sneeden,Jr. PE 6217 Head Road Wilmington, NC 28409 RE/yn MAR 8 2011 March 7,2011 Linda Lewis NC DENR DWQ 127 Cardinal Drive Extension Wilmington, NC 28405 RE:Stormwater Permit Modification Application SW8 011119 The Village at Mayfaire Dear Linda, Attached for your review and approval is the original and one copy of the permit modification application, and check for$505.00. I did not include plans, BMP supplements, O&M agreements, deeds, etc.as they are not a part of the modification and current copies are in your files. The permit modification request is for water quality sampling protocol changes as outlined in your e- mail on August 9, 2010. We will sample at the discharge points of the three detention pond force mains into the infiltration basin (3 samples) and from a new monitoring well in the infiltration basin (1 sample) on a quarterly basis for at least two years. Samples will be analyzed for TSS, hydrocarbons, nitrogen,and phosphorus. Please contact me if you have any questions or concerns. Sincerely, C. Lawrence Sneeden,Jr. PE Cc: Todd Edmiston Ken Mickelson RECEIVED MAR 0 8 2011 .BY: Lewis,Linda From: Lewis,Linda Sent: Tuesday, October 12, 2010 6:03 PM To: 'Scott Mitchell; tammy@tss-nc.com Cc: Scott, Georgette Subject: Sampling Requirements Tammy & Scott: I have requested more information from our folks in Raleigh regarding the sampling requirements at Mayfaire. My main concern is the reluctance on the part of the permittee to accept the new monitoring. The only alternative to not accepting the new monitoring parameters is to keep the current monitoring as is with no changes. This seems counterintuitive. I understand your concerns about the "open-ended" feeling of the permit monitoring requirements, but I believe that the new inspection schedule and sampling parameters will provide a very good indication as to the effectiveness of the BMP's. The plan is to monitor for an additional 2 years only and then evaluate the data to see if any data points to better or worse water quality. There are certain benchmarks for various pollutants that can't be exceeded in stormwater runoff, but these benchmarks are usually applied to industrial stormwater permits, not state stormwater permits. I really don't think you want to have those benchmarks placed into the permit because failure to meet those benchmarks may result in the permittee being required to do even more stormwater treatment and continued monitoring. You may feel that a benchmark is better than having nothing at all to compare to—I don't think so in this case. It is my understanding that the intent of the monitoring was to determine if the permitted BMP's were effective. I think the original intended unwritten benchmark was that if water quality wasn't any worse afterward, then the BMP's were probably effective. Perhaps the previous reports need to be re-evaluated from that standpoint. I'm not convinced that the previous monitoring has demonstrated this, thus the need to look at making changes to see if we can find the inspection and monitoring protocol that will provide acceptable data to make this determination. I think this is what will get the permittee out from continued monitoring requirements once the 2 years is up. I am agreeable to the placement of monitoring wells in locations around the infiltration basins that will provide for an accurate representation of the treated runoff and will be easily accessible for sampling. If they are to be placed outside of an infiltration area, it will be on the downslope side, close to the edge of the basin, as far horizontally and vertically above the stream as possible. The bottom of the well will be no lower than 2 feet below the bottom of the infiltration basin it is intended to sample. We don't want samples of the groundwater below the SHWT—we want samples of the infiltrated runoff. All proposed well locations will be agreed upon and approved by the Division before issuing the permit. I'll let you know what if any recommendations that Raleigh staff has to add to this protracted discussion. Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 1 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. 2 • Lewis,Linda From: Lewis,Linda Sent: Tuesday, October 12, 2010 10:11 AM To: Bennett, Bradley; Patterson, Robert; Scott, Georgette;Vinson, Scott; Johnson, Kelly; Dumpor, Samir Subject: Mayfaire Sampling All: This issue with the sampling parameters at Mayfaire has really gotten out of hand. This is the current permit condition for sampling parameters: 4. Monitoring parameters shall include,at a minimum,the below-listed items, a. -h.Additional monitoring parameters may be required later to address water quality issues in the affected area. a. Total Suspended Solids e. Temperature b. Turbidity f. Conductivity c. Fecal Coliform g. Flow d. Dissolved Oxygen h. pH Notice that it says additional monitoring parameters may be required later.The permittee requested to eliminate the sampling,but they based their request on their belief that the sampling wasn't producing any real results. No conclusion as to the effectiveness of the BMP's could be drawn.Our new proposal is to change the sampling locations and sample for the following: 1. Turbidity 2. Residue: Suspended,Volatile and Fixed 3. TKN as N 4. Total P 5. TPH Gasoline Range They want some kind of"target" value or limit for these parameters in the permit,but I don't think they realize what they are asking for.They don't like the fifth one for TPH. Our response to date has been that the permit allows us to add monitoring parameters.This is all new to me. Bradley had indicated previously that the point of the Mayfaire sampling requirements was to evaluate the effectiveness of the BMP's. Are these sampling parameters adequate to accomplish this? Do we change something else, drop something,add something? They also want us to put a time cap on the monitoring.I guess it costs a lot of money and they want some assurances that it will not go on indefinitely. Thanks for any input. Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 1 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. • 0 w Fir c y Y a cai x po o 0 o c n n to y 3 cr" Z7Q 'Lf O 1=; Q C7 i W d O. A 7! 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N -yam pa r O N w C 1-- 2 co a -. - 5 0 d f7_i' oo P�iii: y 'd b0 A ?' b ,_ N Fo N CO a f9 N I .3 oO I K, 0 n t 'F 'F -c hc a�b r � � ao 000 °° VI m � rrrrr I� I o0 r b I ' State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office Beverly Eaves Perdue, Governor • Dee Freeman, Secretary FAX COVER SHEET Date: ''3 ZV I 0 No. Of Pages: excluding cover) I To: . T2iriin SS Ne From: L(nci2 Levi$ CO: l S S -'5oft c ti as CO: NC DENR FAX #: GI IQ — SS?—4(0 03 . FAX#: 910-350-2004 REMARKS: /4 fel..e ..f owe, Ce4 P-- ...Sall4y • - 127 Cardinal Drive Extension,Wilmington,N.C.28405-3845 Telephone(910)796-7215 Fax(910)350-2004 An Equal Opportunity Affirmative Action Employer Lewis,Linda From: Lewis,Linda Sent: Monday,August 23, 2010 10:37 AM To: 'tammy©tss-nc.com' Cc: Scott, Georgette Subject: RE: Mayfaire Sampling Protocol Tammy: I've read your August 12, 2010 letter, and have the following comments: 1. I agree that dilution of the sample is not what we want, so we would restrict the sample location to the one inlet or last catch basin only. 2. I agree that where there are multiple inlet points, a sample from each one could be pulled and composited. Except for Pond #3 with the long forebay, most of the ponds in Mayfaire have only one ultimate inlet, so I don't think this is a big problem. However, due to relatively flat grade, many systems are designed such that the pipes are surcharged at all times, meaning that unless you catch the sample as it falls into the catch basin, any sample taken from the water flowing at the bottom of the last catch basin is probably diluted from the backed up forebay water already. 3. I understand your comment about the monitoring wells being located within the basin. I'll check with our hydro-geologist, but I disagree that a monitoring well within the infiltration basin itself will contain a quality of water that is the same as what exits the pond. If the well is constructed such that the openings are 2 feet below the bottom, I would anticipate that the water collected from it will be what has infiltrated through the 2 feet of infiltration media before working its way over to the creek. I'm not sure if it is appropriate to pull samples from a well located outside of the basin area as that is not in the treatment area. I'm not opposed to locating the well just outside of the edge of the basin if it will be more convenient to access, but not outside of the property boundary and not next to the stream. 4. The current permit allows that additional monitoring parameters may be required later to address water quality issues in the affected area. We understand that the system is not designed to treat for hydrocarbons or phosphorous, but since they are generated by the parking lots and grassed areas of a commercial development, we have added these 2 parameters and removed 7 other-parameters including temperature, conductivity, flow, pH, DO, turbidity and fecal coliform. I think that's a fair exchange. We understand and agree that the systems were not designed to treat for the new parameters or for those 7 previous parameters. You have to remember that this is the ORW waters of. Howe Creek and that Mayfaire is a unique kind of permit. 5. Although the initial request was to eliminate monitoring, the Division has determined that more relevant monitoring is needed. The Division has read all of the monitoring reports that have been submitted. No obvious trends could be discerned as the data were all over the place. We need for the new monitoring to be conducted for at least 2 years to see if any trends can be identified. At the end of that 2 years, as previously stated, we will again entertain a request to eliminate the monitoring. Thanks, Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 1 127 Cardinal Drive Ext. Wilmington, NC ,28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: tammy@tss-nc.com [mailto:tammy@tss-nc.com] Sent: Friday,August 20, 2010 10:51 AM To: Lewis,Linda Cc: scott@tss-nc.com Subject: RE: Mayfaire Sampling Protocol Hi Linda, I hope you're doing well. After reviewing the recommended revised sampling protocol with our client, we responded with a letter that stated our concerns/comments/questions. I hand delivered that letter to your office on Thursday, August 12 and wanted to see if you/your office has had a chance to review it. Please feel free to call me at 910.622.7844 or Scott at 919.669.0329 if you have any questions or need additional information. Sincerely, Tammy M. Spivey President Total Stormwater Solutions, Inc. 2101 Plaza Drive Wilmington, NC 28405 910.622.7844 www.tss-nc.com Original Message Subject: RE: Mayfaire Sampling Protocol From: "Lewis,Linda" <Iinda.lewisOncdenr.gov> Date: Mon, August 09, 2010 12:14 pm To: "tammyetss-nc.com" <tammyChtss-nc.com>, Larry Sneeden <larrysneedenObellsouth.net> Cc: "Scott, Georgette" <georgette.scottOncdenr.gov>, "Bennett, Bradley" <bradley.bennettOncdenr.gov> Tammy and Larry: The sampling for Mayfaire has finally been worked out. It's s a little different than what we were originally planning. I discussed the situation at length with our NPDES and ambient monitoring staff, supervisors and Central office staff. We all agreed that sampling the individual BMP bypassed runoff was probably not going to get us what we wanted. IThe original intent of the sampling was to make sure the BMP's were functioning as designed to Iprotect Howe Creek. The systems for The Village and for the Town Center are similarly designed. They both are required to capture and treat the design storm without discharging to surface waters. 2 2010 T• S • S REC'D AUG 12 Total Stormwater Solutions, Inc. August 12, 2010 Ms.Linda Lewis NC Division of Water Quality 1 127 Cardinal Drive Ext. /, .4) Wilmington,NC 28405 Subject: PROPOSED REVISED MONITORING PROTOCOL Permit No.SW8 010512 Renewal Mayfaire Town Center (Phase 1) Dear Ms.Lewis: This letter is in response to DWQ's recommended revised sampling protocol that you provided via email on August 9,2010. The revised DWQ protocol is numbered and outlined below,followed by concerns/comments provided by Total Stormwater Solutions,Inc. (TSS)on behalf of Mayfaire Management Company,LLC(Mayfaire). 1. Samples will be pulled for the first flush runoff into each wet pond storage area either at the last catch basin,or the forebay—whichever is most convenient and accessible. TSS response: The above recommendation will not allow for accurate influent sampling,as the sample becomes diluted by the water that exists in the pond before the monitoring event. The influent has to be collected inside of the catch basin(s)prior to entering the pond or forebay in order to achieve accurate, non-diluted results. Further, we believe samples should be collected from each concentrated inflow point(catch basin,pipe,flume, swale, etc.)for each respective system and combined into a composite influent sample, as using one sample point could result in varying results depending on traffic, environmental conditions, etc.. 2. We are also recommending the installation of a monitoring well within each permitted infiltration area.Depending on the size of the infiltration area,more than 1 well may be needed. Samples of the water that is infiltrating will be pulled from the wells and analyzed to allow us to know the quality of the water that is being infiltrated. TSS response: The monitoring wells have to be located outside of the infiltration basins, halfway between the basin edge and the receiving stream in order to accurately assess the entire system's function. The recommendation of installation of a monitoring well inside of the infiltration basin completely ignores the treatment provided by the infiltration basin and essentially serves no purpose, as the water that would be sampled by such a well is essentially the same as water that exits the pond. Also, multiple wells are needed in order to ensure the effluent sample is truly representative of the system's capacity as opposed to a single well that may be unknowingly installed in some form of geologic anomaly that produces outlier effluent results. TnanRle Area Office: Wilminzton Area Office: *BMF Inspection,Maintenance, PO Box 341 2101 Plaza Drive Installation&Recordkeeping Fuquay-Varina,NC 27526 Wilmington,NC 28405 *Wetlands&Buffer Restoration, 919-557-4682 910-622-7844 Creation&Enhancement 3. We are recommending the elimination of the fecal coliform monitoring only if more dog"pooper- scooper"bag and disposal stations are added at strategic points where the dog-walkers will have better access to them. TSS response: We concur. Mayfaire has already ordered pet waste removal stations to be installed at strategic locations throughout the property. 4. We are recommending that the upstream and downstream sampling of Howe Creek continue (Town Center only). TSS response: We concur and propose that Howe Creek upstream and downstream samples be collected concurrent with the BMP outflow sampling from wells installed as recommended above. 5. We are eliminating the requirement to sample the ponds that drain to Bradley Creek(Town Center). TSS response: We concur. 6. Sampling will be for TSS,hydrocarbons,nitrogen and phosphorous. TSS response: We concur with continued TSS sampling. However, the BMPs that serve this site were not specifically designed to treat hydrocarbons or phosphorus, so we do not concur with adding any new monitoring parameters after five and a half years of collecting and submitting extensive data to DWQ as specified per the original permit. If there are additional justifications and/or facts that warrant the inclusion of additional and dfferent data parameters in the testing protocol,please forward these for our review. 7. Quarterly sampling for at least 2 years.At the end of 2 years the permittee can again request to eliminate the sampling.Depending on the results,the Division may or may not elect to eliminate. TSS response: We do not concur with the two year minimum requirement. Mayfaire has diligently performed the required monitoring, and provided the required quarterly reports to DWQ for data collected since December 2004. This five and a half years of data compiled by tests specifically outlined by DWQ(including parameters, timing and sampling locations) have been provided by Mayfaire to DWQ without any feedback, mentions of concern over the data, or mentions of concern over the methodology of gathering the data. This makes the decision to continue testing appear somewhat arbitrary without the inclusion of a clear performance standard that would trigger the elimination of testing. It is our opinion that elimination of sampling requirements is justifiable after four(4) results that are consistent with the permit requirements,are achieved. 8. A request to modify the permit to change the monitoring requirements will require a$505.00 fee and a new application.No new supplements or new signed O&M's will be required—the current ones will be good. TSS response: Mayfaire will submit a permit modification request. We sincerely appreciate your review and consideration of our request to eliminate all monitoring for Mayfaire Town Center,and are thankful for your elimination of a majority of the original monitoring parameters. We continue to be baffled,however,by the recommended methodology of gathering the samples. We respectfully request that DWQ staff take a second look at our proposed monitoring protocol (outlined in our June 18, 2010 letter addressed to Ms. Georgette Scott, and attached to this letter as reference),which outlines,in a more scientifically appropriate manner,the how's and why's of collecting the data as we recommended. Please do not hesitate to call or email us with any questions. I can be reached at 910.622.7844,and Scott can be reached at 919.669.0329. Sincerely, '6Fil \r-C/it Tammy M. ive B. Scott Mitchell,PE,LSS Y President Vice President Cc: Georgette Scott,DWQ Mite* ' '/4�'• Dan Rahe,Director of Construction,Mayfaire I,LLC °` " '�' .f it '� (1011. _ , 4+ / , E . , is t'§ l' (i �Y enclosure f j 4v 6 Proposed BMP Monitoring Protocol: • Total Suspended Solids shall be the only parameter sampled. • Three(3)monitoring wells shall be installed at each infiltration basin(Basins 2,3 and 4) halfway between each infiltration basin and its receiving creek or stream. • Grab samples shall be collected from each concentrated inflow point(pipe,flume,swale, etc.)for each respective system and combined as a composite sample representative of each BMP system. • Samples from the monitoring wells shall be pulled approximately 3-10 days after a representative storm event. • Monitoring requirements will be automatically eliminated if and when the first four events sampled illustrate achievement of the design target of 90% TSS reduction. For BMP systems,we propose the monitoring protocol be modified to more accurately illustrate the efficacy of each BMP. We propose that this be completed by installing 3 monitoring wells at each infiltration basin(Basins 2, 3 and 4—Pond 1 discharges to Infiltration Basin 2;for a total of 9 wells) with wells located approximately halfway between each infiltration basin and its receiving creek or stream. Samples for total suspended solids shall be pulled approximately 3-10 days after a representative storm event,allowing time for the entire BMP system to perform its design function. Actual lag time between inflow sampling and outflow sampling from the proposed monitoring wells will be calculated more precisely upon your approval of this revised monitoring protocol,using in-situ hydraulic conductivity data and topographic data gathered during the site testing and planning phase,prior to design of the BMPs. Further,we propose that the inflow monitoring protocol be modified to reflect a more accurate assessment of BMP function. Currently,inflow grab samples are collected within the pond itself,allowing heavily diluted influent to be used as the inflow sample. Instead,we suggest that grab samples be collected from each concentrated inflow point(pipe,flume, swale, etc.)for each respective system and combined as a composite sample representative of each BMP system. We also request the permit's monitoring requirements be modified such that it will be automatically eliminated if and when the first four events sampled illustrate achievement of the design target of 90%TSS reduction. Lastly,we ask that Mayfaire be allowed to perform the sampling more frequently than once per quarter to reach the proposed minimum of four samples as quickly as possible,if weather patterns allow. Proposed Howe Creek Monitoring Protocol: • Total Suspended Solids shall be the only parameter sampled. • Upstream and downstream samples shall be collected concurrent with the BMP outflow sampling from wells. • Monitoring requirements will be automatically eliminated when the BMP monitoring is eliminated. It is our opinion that Howe Creek should not be sampled during a representative storm event since flow conditions during these potentially intense storms are not representative of normal aquatic conditions. Rather,we propose that Howe Creek upstream and downstream samples be collected concurrent with the BMP outflow sampling from wells installed as recommended above. Stormwater BMPs on this site are designed to allow the untreated bypass of flows in response to storms more intense than the 1.5-inch rainfall design storm;thereby allowing the possibility of sampling during one of these events that the system was never designed or intended to treat. It is worthy to note that the site is very near full build- out. Hence,we do expect average TSS values to continue to decrease over time as the site reaches full build-out and we anticipate this will be illustrated over the next monitoring period if our proposed protocol modifications are implemented. Lewis,Linda From: Lewis,Linda Sent: Monday, August 09, 2010 12:15 PM To: 'tammy@tss-nc.com'; 'Larry Sneeden' Cc: Scott, Georgette; Bennett, Bradley Subject: RE: Mayfaire Sampling Protocol Tammy and Larry: The sampling for Mayfaire has finally been worked out. It's a little different than what we were originally planning. I discussed the situation at length with our NPDES and ambient monitoring staff, supervisors and Central office staff. We all agreed that sampling the individual BMP bypassed runoff was probably not going to get us what we wanted. The original intent of the sampling was to make sure the BMP's were functioning as designed to protect Howe Creek. The systems for The Village and for the Town Center are similarly designed. They both are required to capture and treat the design storm without discharging to surface waters. They both utilize a wet pond for storage of the design storm, which then directs that design storm runoff to an infiltration area and allows excess design storm to overflow through a vegetated filter. The difference is that The Village uses pumps to get from the pond to the infiltration area to the bypass and the Town Center uses gravity. The quarterly sampling reports were reviewed by our ambient monitoring and NPDES staff people. As a result, we are recommending quarterly sampling for at least 2 years. 1. Samples will be pulled for the first flush runoff into each wet pond storage area either at the last catch basin, or the forebay, or at the end of the forcemain where it dumps into the infiltration basin (The Village)—whichever is most convenient and accessible. This will allow us to know the quality of the incoming runoff before it gets to the infiltration basin. 2. We are also recommending the installation of a monitoring well within each permitted infiltration area. Depending on the size of the infiltration area, more than 1 well may be needed. Samples"of the water that is infiltrating will be pulled from the wells and analyzed to allow us to know the quality of the water that is being infiltrated. 3. We are recommending the elimination of the fecal coliform monitoring only if more dog °pooper- scooper" bag and disposal stations are added at strategic points where the dog-walkers will have better access to them. 4. We are recommending that the upstream and downstream sampling of Howe Creek continue (Town Center only). 5. We are eliminating the requirement to sample the ponds that drain to Bradley Creek (Town Center). Sampling will be for TSS, hydrocarbons, nitrogen and phosphorous. This should be less costly to the permittee than the current protocol. At the end of 2 years the permittee can again request to eliminate the sampling. Depending on the results, the Division may or may not elect to eliminate. A request to modify the permit to change the monitoring requirements will require a $505.00 fee and a new application. No new supplements or new signed O&M's will be required —the current ones will be good. Linda Please note my new email address is Linda.Lewis@ncdenr.gov 1 Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: tammy@tss-nc.com [mailto:tammy@tss-nc.com] Sent: Monday,August 09, 2010 10:19 AM To: Lewis,Linda Subject: RE: Mayfaire Sampling Protocol Hi Linda, Hope you're doing well. Would you mind sharing the decision in brief via email or phone? Thanks, Tammy Original Message Subject: RE: Mayfaire Sampling Protocol From: "Lewis,Linda" <Iinda.lewisencdenr.gov> Date: Fri, August 06, 2010 11:15 am To: Scott Mitchell <scottc tss-nc.com> Cc: "tammyCTtss-nc.com" <tammy@tss-nc.com>, "Scott, Georgette" <georgette.scottOncdenr.00v> Yes, I'm planning to draft a response to the permittees of both The Village and the Town Center regarding what we've decided. Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Scott Mitchell [mailto:scott@tss-nc.com] Sent: Friday,August 06, 2010 10:24 AM I To: Lewis,Linda 2 Cc: tammyCa)tss-nc.com Subject: Mayfaire Sampling Protocol Linda, I spoke with Linda Willis a few minutes ago and she indicated that you and your staff have made a decision regarding our proposed modifications to the stormwater sampling protocol for Mayfaire. Can you provide me with a summary of the decision so we can begin planning for the modifications? Thanks, Scott Mitchell,PE,LSS Total Stormwater Solutions,Inc. PO Box 341 Fuquay-Varina,NC 27526 Scott(a,,TSS NC.com wwx.TSS-NC.com 919-557-4682 Office 919-557-4683 Fax 919-669-0329 Mobile 3 Lewis,Linda From: Lewis,Linda Sent: Monday, July 26, 2010 9:42 AM To: Scott, Georgette Cc: Willis, Linda; Pettergarrett, Stephanie Subject: RE: Mayfaire Sampling Changes Town Center&The Village Georgette: OK- I took notes from our discussion. I'll see if we can get with Linda W. and maybe Stephanie to make sure they are OK with the changes to the sampling strategy. The 2 Mayfaire permits that are requesting elimination of the monitoring are the Town Center and the Village at Mayfaire. We will not be eliminating the sampling, but we will be modifying the sampling requirements in order to provide meaningful data. Both projects have similar systems- pond storage areas that release slowly into infiltration areas with overflows to vegetated filters. The main difference is that the Town Center uses gravity feed from the pond to the infiltration areas and the Village uses pumps. I think we agreed that the simplified sampling protocols should be the same though: 1. Inspection during a design storm event to make sure that no discharge to surface waters occurs. This is the design basis of the system. Some of the systems were designed to handle 1.5", others were designed to handle a larger design storm. 2. For storms exceeding the design storm, sample at the inlet to the storage area, at the bypass to the vegetated filter, i.e., the point where the runoff in excess of the design storm enters the filter and at the outlet of the vegetated filter before it gets into surface waters. 3. Fecal coliform sampling could be discontinued only if extra "pooper-scooper" stations are added around the storage areas. The stations would have plastic bags and a disposal bin to encourage dog walkers to pick up after their pets and dispose of the waste properly. Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Scott, Georgette Sent: Friday,July 23, 2010 11:37 AM To: Lewis,Linda Subject: RE: Mayfaire Town Center(Phase I) SW8 010512 Renewal Linda, I have been reviewing the data from Tammy and I have some concerns. Rick also mentioned to me that he spoke with the engineers that performed the monitoring. We need to discuss before meeting with Tammy. I would like to have Linda Willis's opinion. She is out in the field this afternoon. i Georgette Scott Stormwater Program Supervisor State Stormwater Program NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington,NC 28405 Phone(910)796-7335 Fax(910)350-2004 E-mail correspondence to and from this address may be subject to the North Carolina Public Records law and may be disclosed to third parties. From: Lewis,Linda Sent: Friday,July 23, 2010 10:59 AM To: tammy@tss-nc.com Cc: Scott, Georgette Subject: RE: Mayfaire Town Center(Phase I) SW8 010512 Renewal Thank you but no, there is no need for you to be there as we are meeting to discuss various other unrelated permit matters as well. This is a big decision for the Division because of the manner in which the permits were originally issued. It's important that we make the right decision for the right reason and that may take some time. Please bear with us. To my knowledge, we don't have a statutory time limit on this type of request, but if there is a time limit it will be 90 days, which is what is in the rules. We're currently well within the 90 days. I do expect to be able to provide an answer after the August 5 meeting, which would be about a month before the 90 day time clock expires. Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: tammy@tss-nc.com [mailto:tammy@tss-nc.com] Sent: Friday,July 23, 2010 10:21 AM To: Lewis,Linda Subject: RE: Mayfaire Town Center(Phase I) SW8 010512 Renewal Thanks Linda. Would it be beneficial to have us at the August meeting? I know this is not a typical request for your office (or maybe even in general), but is there a statutory review time-frame (similar to permit applications)? 1 Original Message Subject: RE: Mayfaire Town Center (Phase I) SW8 010512 Renewal From: "Lewis,Linda" <linda.lewisCalncdenr.gov> IDate: Fri, Juiy 23, 2010 10:06 am To: "tammy(atss-nc.com" <tammyOtss-nc.com> 2 Sorry Tammy. No progress yet. We've been busy stamping out a lot of big fires lately. I'm going to need the input from Raleigh staff on the proposal. That meeting is currently scheduled for early August. Thanks for your patience. Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: tammy( tss-nc.com [mailto:tammy@tss-nc.com] Sent: Friday,July 23, 2010 9:45 AM To: Lewis,Linda Subject: RE: Mayfaire Town Center(Phase I) SW8 010512 Renewal Hi Linda, I hope you're doing well. Will you please let me know the status of our monitoring elimination request. We submitted the request with supporting data on Friday, June 18 N 5 weeks ago today. Thanks so much N look forward to hearing back from you soon. Tammy M. Spivey President Total Stormwater Solutions, Inc. 2101 Plaza Drive Wilmington, NC 28405 910.622.7844 www.tss-nc.com Original Message Subject: RE: Mayfaire Town Center (Phase I) SW8 010512 Renewal From: "Lewis,Linda" <linda.lcwisancdenr.gov> Date: Wed, July 07, 2010 9:47 am To: "tammyCaltss-nc.com" <tammyC8 tss-nc.com> Sorry Tammy.This is on the back burner at the moment. When it's reviewed, I'll let you know. A request to remove monitoring requirements from a permit has a lot of hoops to jump II through. It will be going through many hands before anything is done. 3 Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: tammyCTtss-nc.com [mailto:tammyCa�tss-nc.com] Sent: Friday, July 02, 2010 2:14 PM To: Lewis,Linda Subject: RE: Mayfaire Town Center(Phase I) SW8 010512 Renewal Hi Linda, I know that you're swamped, but I wanted to check in and see if you've had a chance to review our monitoring petition request (with supporting data) yet. Thanks! Tammy M. Spivey President Total Stormwater Solutions, Inc. 2101 Plaza Drive Wilmington, NC 28405 910.622.7844 www.tss-nc.com Original Message Subject: RE: Mayfaire Town Center (Phase I) SW8 010512 Renewal From: "Lewis,Linda" <Iinda.lewisOncdenr.gov> Date: Wed, June 23, 2010 5:05 pm To: "tammyatss-nc.com" <tammy(atss-nc.com> Tammy- I received it, but have not had a chance to review it yet. We are losing 2 people, so my workload has increased. It will take a while to get to it, but I will get in touch if there are any questions or concerns. Linda Please note my new email address is Linda.Lewis@ncdenr.gov Linda Lewis NC Division of Water Quality 127 Cardinal Drive Ext_ I Wilmington, NC 28405 4 910-796-7215 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: tammy@tss-nc.com [mailto:tammy@tss-nc.com] Sent: Wednesday,June 23, 2010 4:57 PM To: Lewis,Linda Subject: Mayfaire Town Center(Phase I) SW8 010512 Renewal Hi Linda, I hope you're doing well. I just wanted to check in to confirm that you received the monitoring petition request &supporting data that I dropped off at your office last Friday. If you've had a chance to look over it and have questions, please don't hesitate to call Scott (919.669.0329) or me. Thanks, Tammy M. Spivey President Total Stormwater Solutions, Inc. 2101 Plaza Drive Wilmington, NC 28405 910.622.7844 www.tss-nc.com 5 Lewis,Linda From: Larry Sneeden [larrysneeden@bellsouth.net] Sent: Friday, July 09, 2010 1:44 PM To: Lewis,Linda Cc: Todd Edmiston ; Ray Skipper Subject: FW: WQ Sampling for Village at Mayfaire- Please Reply Attachments: Village at Mayfaire Pond WQ Monitoring Summary 02-10-10.pdf Linda, Following is the message with attached summary I sent February. Please review and call me.Also, please respond back upon receipt so that I can verify you have the information. Thanks and have a nice weekend. Larry Sneeden C. Lawrence Sneeden,Jr. PE Coastal Carolina Resource Group, Inc. 109 Fairview Road PO Box 2050 Leland, NC 28451 910-792-6954(0) 910-792-6956(F) 910-520-1835 (M) From: Larry Sneeden [mailto:larrysneeden@bellsouth.net] Sent: Wednesday, February 10, 2010 10:45 AM To: Linda Lewis Cc: Todd Edmiston ; Bernie McGuire ; Ray Skipper Subject: WQ Sampling for Village at Mayfaire Linda, To follow up on our meeting last November 23rd, I have attached a summary of the pond inflow sampling results I have on file.The 2Q07 and 3Q07 results are from MACTEC reports and the 4Q08 sampling was done by CCRG. I am not sure this provides the consistent baseline data we expected. It does not surprise me as I would expect significant fluctuations based on time of year, elapsed time after rainfall begins, intensity of rainfall,and time since the last significant rainfall event. At the November meeting,we agreed on a sampling program to include a minimum of 4 rainfall events of sufficient intensity(minimum 1.5")to cause a discharge to the pond discharge vegetated filters.Samples would be taken at the inflow and outflow points for Pond#1,#2,&#3 filters. I recommend we add an inflow sample at each pond to be made at the same time as the filter samples.This would not provide first flush data but it would provide a good snapshot of how each pond and filter performs at a given time in a given event. We also discussed monthly inspections of the vegetated filters and infiltration basin.We are working with Village at Mayfaire to upgrade the present maintenance and inspection program. Please let me know how to proceed.We are ready to move forward with this work. Larry Sneeden 1 C. Lawrence Sneeden,Jr. PE Coastal Carolina Resource Group, Inc. 109 Fairview Road PO Box 2050 Leland, NC 28451 910-792-6954(0) 910-792-6956(F) 910-520-1835(M) 2 Village at Mayfaire Monitoring Summary Location 2Q07 3Q07 4Q08 Pond#1 Inflow TSS(mg/I) 2 2 39 Turbidity(NTU) 4.9 5.9 26.6 Fecal Coliform (colonies/100 ml) <10 >60,000 11,600 Dissolved Oxygen (mg/I) 9 5.65 8.15 Conductivity(mS/cm) 0.065 0.054 N/A pH (units) 3.02 7.63 7.42 Temperature(°C) 15.8 23.6 17.2 Pond#2 Inflow TSS(mg/I) 3 3 43 Turbidity(NTU) 6.1 4.3 23 Fecal Coliform(colonies/100 ml) <10 >60,000 325 Dissolved Oxygen (mg/I) 8.54 5.24 6.06 Conductivity(mS/cm) 0.087 0.087 0.361 pH (units) 8.34 7.73 7.69 Temperature(°C) 16 23.4 16.3 Pond#3 Inflow TSS(mg/I) 5 5 7 Turbidity(NTU) 4.6 4.4 3.7 Fecal Coliform(colonies/100 ml) <10 >60,000 37 Dissolved Oxygen (mg/I) 8.41 4.91 6.65 Conductivity(mS/cm) 0.082 0.037 0.121 pH (units) 8.38 7.52 7.31 Temperature(°C) 15.4 23.6 16 Pond#4 Inflow TSS(mg/I) 1 13 76 Turbidity(NTU) 2.7 13.5 57.6 Fecal Coliform(colonies/100 ml) <10 >60,000 520 Dissolved Oxygen (mg/I) 6.74 3.83 7.42 Conductivity(mS/cm) 0.069 0.058 0.168 pH (units) 7.2 8.19 7.43 Temperature(°C) 15.7 23.7 17.2 T• S •S Total Stormwater Soluti ;;�� Inc. SCE � June 18,2010 ,uN 1 S �p1p Ms.Georgette Scott NC Division of Water Quality �Y 127 Cardinal Drive Ext. Wilmington,NC 28405 EC �UN18 2 Subject: Permit No.SW8 010512 Renewal 010 Mayfaire Town Center (Phase 1) MONITORING DATA REVIEW/SUMMARY IN SUPPORT OF REQUEST TO ELIMINATE INSTREAM AND BMP MONITORING REQUIREMENTS Dear Ms. Scott: On June 03,2010,Total Stormwater Solutions,Inc.(TSS)submitted a request for the elimination of all monitoring requirements for Mayfaire Town Center(Permit No. SW8 010512;renewal,dated January 18, 2008)on behalf of Mayfaire Management Company,LLC,(Mayfaire). In support of this request,Mr.Dan Rahe(Mayfaire),Mrs.Tammy Spivey(TSS)and Mr. Scott Mitchell(TSS)met with Ms.Linda Lewis of your office on June 07,2010,to discuss the request and potential concerns your office may have with the request. During the meeting,Ms.Lewis explained that the purpose of the required monitoring was a means of illustrating to your office,and concerned citizens and organizations,that the project was not degrading water quality within Howe Creek. To-date,monitoring protocol has included quarterly storm event monitoring of Howe Creek(upstream and downstream),Two Mile Branch, and inflow and outflow points of ponds 1,3 and 4. In addition,quarterly instream analytical monitoring of Howe Creek(upstream and downstream)and Two Mile Branch has been performed during separate,non-storm event periods. Parameters tested on this schedule included: 1)Total Suspended Solids,2)Turbidity,3)Dissolved Oxygen,4)Temperature,5) Conductivity,6)Flow,and 7)pH. In addition to twice quarterly sampling for these parameters,fecal coliform sampling has been completed for these same locations five times per month—a total of 60 times per year per sample location. This level of sampling intensity has been sustained by Mayfaire since December 2004. During the June 07,2010 meeting,Ms.Lewis confirmed that Mayfaire was not required to sample the BMPs that discharge into Two Mile Branch or Two Mile Branch itself;therefore,monitoring of Two Mile Branch has been halted. In an email later that same day,Ms.Lewis confirmed that Mayfaire only needed to pull 5 fecal samples in the month that the quarterly sampling was done—a total of 20 samples per year per sample location.This change has also already been implemented by Mayfaire. Mayfaire Town Centers' stormwater management system consists of two(2)alternative systems of wet detention ponds and infiltration basins(systems#3 and#4),one(1)wet detention pond alone(system#1)and one(1)infiltration basin alone(system#2). Per the approved permit,BMP monitoring requires grab samples of the first flush inflow and the discharge outflow. The first flush inflow sample window is within the first 30 minutes of a discernible inflow from a representative storm event;the discharge outflow sample window is within the first 30 minutes of discharge from that same storm event. BMP sampling locations were field determined by DWQ staff in December 2004. Per DWQ's specifications on sampling locations,grab samples have been collected within the ponds themselves,allowing heavily diluted influent to be used as the inflow samples. Grab samples should be collected from each concentrated inflow point(pipe,flume,Swale, etc.)for each respective system and combined as a composite sample representative of each BMP system. In 1 addition,the discharge outflow samples have been taken in locations that test water going to infiltration basins,not water that may leave the basins and potentially impact Howe Creek before complete treatment; outflow sample locations should be half-way between the basin and Howe Creek and be pulled approximately 3-10 days after a representative storm event,allowing time for the entire BMP system to perform its design function. TSS has completed a thorough review of the monitoring data supplied to us by Mayfaire,which spans from December 2004 to March 2010. We have compiled this data and attached the parameter summaries, spreadsheets and graphs illustrating this data for your review. In summary,all parameters tested for Howe Creek(except total suspended solids and turbidity),show slight improvement or little to no change at the downstream sampling location in comparison to the upstream sampling location. Even though turbidity samples show a slight degradation downstream, 76%of the instream samples and 95%of the storm event samples meet the 15A NCAC 2B Standard of<25 NTU for SA ORW waters.In addition,although the BMP outflow samples were taken at locations premature in the treatment process,all parameters tested(except total suspended solids and turbidity),show slight improvement or little to no change at the inflow sampling location in comparison to the outflow sampling location. Overall,fecal coliform spikes are trending in the summer months when intense rainfall events are typical,and pet walking around the BMPs,Howe Creek and upstream neighborhoods is greatest. If DWQ is not willing to completely eliminate monitoring at this time,it is the opinion of Total Stormwater Solutions that only the total suspended solids parameter needs continued monitoring to substantiate system efficacy. If DWQ feels that additional monitoring is needed,Total Stormwater Solutions proposes the following revised monitoring protocol,which more closely mirrors the design function of the BMPs,on behalf of Mayfaire: Proposed BMP Monitoring Protocol: • Total Suspended Solids shall be the only parameter sampled. • Three(3)monitoring wells shall be installed at each infiltration basin(Basins 2,3 and 4) halfway between each infiltration basin and its receiving creek or stream. • Grab samples shall be collected from each concentrated inflow point(pipe,flume,swale,etc.) for each respective system and combined as a composite sample representative of each BMP system. • Samples from the monitoring wells shall be pulled approximately 3-10 days after a representative storm event. • Monitoring requirements will be automatically eliminated if and when the first four events sampled illustrate achievement of the design target of 90% TSS reduction. For BMP systems,we propose the monitoring protocol be modified to more accurately illustrate the efficacy of each BMP. We propose that this be completed by installing 3 monitoring wells at each infiltration basin (Basins 2, 3 and 4—Pond 1 discharges to Infiltration Basin 2;for a total of 9 wells)with wells located approximately halfway between each infiltration basin and its receiving creek or stream. Samples for total suspended solids shall be pulled approximately 3-10 days after a representative storm event,allowing time for the entire BMP system to perform its design function. Actual lag time between inflow sampling and outflow sampling from the proposed monitoring wells will be calculated more precisely upon your approval of this revised monitoring protocol,using in-situ hydraulic conductivity data and topographic data gathered during the site testing and planning phase,prior to design of the BMPs. Further,we propose that the inflow monitoring protocol be modified to reflect a more accurate assessment of BMP function. Currently,inflow grab samples are collected within the pond itself,allowing heavily diluted influent to be used as the inflow sample. Instead,we suggest that grab samples be collected from each concentrated inflow point(pipe,flume, swale, etc.)for each respective system and combined as a composite sample representative of each BMP system. We also request the permit's monitoring requirements be modified such that it will be automatically eliminated if and when the first four events sampled illustrate achievement of the design target of 90%TSS 2 reduction. Lastly,we ask that Mayfaire be allowed to perform the sampling more frequently than once per quarter to reach the proposed minimum of four samples as quickly as possible,if weather patterns allow. Proposed Howe Creek Monitoring Protocol: • Total Suspended Solids shall be the only parameter sampled. • Upstream and downstream samples shall be collected concurrent with the BMP outflow sampling from wells. • Monitoring requirements will be automatically eliminated when the BMP monitoring is eliminated. It is our opinion that Howe Creek should not be sampled during a representative storm event since flow conditions during these potentially intense storms are not representative of normal aquatic conditions. Rather,we propose that Howe Creek upstream and downstream samples be collected concurrent with the BMP outflow sampling from wells installed as recommended above. Stormwater BMPs on this site are designed to allow the untreated bypass of flows in response to storms more intense than the 1.5-inch rainfall design storm;thereby allowing the possibility of sampling during one of these events that the system was never designed or intended to treat. It is worthy to note that the site is very near full build-out. Hence,we do expect average TSS values to continue to decrease over time as the site reaches full build-out and we anticipate this will be illustrated over the next monitoring period if our proposed protocol modifications are implemented. Based on the fecal coliform spikes trending in the warmer summer months,presumably due to pet waste (field verged)and intense,warm-weather rainfall events,Total Stormwater Solutions does not feel that continued fecal coliform monitoring should be required,as BMPs are not designed or intended to reduce fecal coliform concentrations. We do strongly recommend,however,that proactive steps be taken to address the problem of pet waste deposition around BMPs and Howe Creek. To that end,Mayfaire has already ordered pet waste removal stations to be installed at strategic locations throughout the property. Further,we have also recommended the installation of public education signage regarding the impacts of pet waste on surface water quality,providing residents and patrons with the knowledge required to actively take part in the protection of Howe Creek. Please do not hesitate to call or email us with any questions. Tammy can be reached at 910.622.7844 and Scott can be reached at 919.669.0329. We thank you in advance for your time and for your consideration of our requests. Sincerely, ametnten sovel Tammy M.Spivey Scott Mitchell,PE,LSS President Vice President Sakt -44 4.�' al Cc: Linda Lewis,DWQ • Dan Rahe,Director of Construction,Mayfaire I,LLC � t C � 3 °P OR1H HOWE CREEK Quarterly Instream Sampling • TSS —9 of 21 samples show equal or reduced TSS downstream of Mayfaire(no standard) • Turbidity—9 of 21 samples show reduced turbidity downstream of Mayfaire;20 of 21 samples meet the 15A NCAC 2B Standard of<25 NTU for SA ORW waters • Dissolved Oxygen—14 of 21 samples show increased dissolved oxygen, getting dissolved oxygen closer to,or meeting the 15A NCAC 2B Standard of>5 mg/L for SA ORW waters, downstream of Mayfaire • Conductivity—samples upstream and downstream closely correlate,showing little to no change in conductivity between upstream and downstream measurements(no standard) • pH—19 of 21 samples show increased pH,getting pH closer to,or meeting the 15A NCAC 2B Standard for SA ORW waters of 6.8-8.5 units • Temperature—samples upstream and downstream correlate,showing little to no change in temperature between upstream and downstream measurements(no standard) • Flow—samples show little to no change in flow upstream verses downstream Storm Event Sampling • TSS—9 of 21 samples show equal or reduced TSS downstream of Mayfaire(no standard) • Turbidity—3 of 21 samples show reduced turbidity downstream of Mayfaire; 16 of 21 samples meet the 15A NCAC 2B Standard of<25 NTU for SA ORW waters • Dissolved Oxygen— 15 of 21 samples show increased dissolved oxygen, getting dissolved oxygen closer to,or meeting the 15A NCAC 2B Standard of>5 mg/L for SA ORW waters, downstream of Mayfaire • Conductivity—samples upstream and downstream correlate,showing little to no change in conductivity between upstream and downstream measurements(no standard) • pH—18 of 21 samples show increased pH,getting pH closer to,or meeting the 15A NCAC 2B Standard for SA ORW waters of 6.8-8.5 units • Temperature-samples upstream and downstream correlate,showing little to no change in temperature between upstream and downstream measurements(no standard) • Flow—samples show little to no change in flow upstream verses downstream Fecal Coliform As seen on the attached graphs,the spikes in fecal coliform colonies are typically happening in the warmer months(May/June through September/October),when we tend to see an increase in pet walking,combined with intense rainfall events which result in drastically increased pet waste loads washing into the BMPs and Howe Creek. 4 BMP STORM EVENT SAMPLING Pond 1 • TSS—15 of 19 samples show reduced TSS at the outflow • Turbidity— 15 of 19 samples show reduced turbidity at the outflow • Dissolved Oxygen— 14 of 20 samples show increased dissolved oxygen • Conductivity—inflow and outflow samples closely correlate,showing little to no change in conductivity between inflow and outflow measurements • pH—samples closely correlate; 18 of 20 samples show increased pH • Temperature-inflow and outflow samples closely correlate, showing little to no change in temperature between inflow and outflow measurements • Flow—samples show little to no change in flow Pond 3 • TSS—6 of 16 samples show reduced TSS at the outflow • Turbidity—6 of 16 samples show reduced turbidity at the outflow • Dissolved Oxygen— 10 of 16 samples show increased dissolved oxygen • Conductivity-inflow and outflow samples closely correlate,showing little to no change in conductivity between inflow and outflow measurements • pH—samples closely correlate; 11 of 16 samples show slightly increased pH • Temperature-inflow and outflow samples closely correlate, showing little to no change in temperature between inflow and outflow measurements • Flow—samples show little to no change in flow Pond 4 • TSS—10 of 17 samples show reduced TSS at the outflow • Turbidity—7 of 17 samples show reduced turbidity at the outflow • Dissolved Oxygen— 10 of 17 samples show increased dissolved oxygen • Conductivity—inflow and outflow samples closely correlate,showing little to no change in conductivity between inflow and outflow measurements • pH—samples closely correlate; 14 of 17 samples show slightly increased pH • Temperature-inflow and outflow samples closely correlate,showing little to no change in temperature between inflow and outflow measurements • Flow—samples show little to no change in flow Fecal Coliform(Ponds 1,3 and 4) As seen on the attached graphs,the spikes in fecal coliform colonies are typically happening in the warmer months(May/June through September/October),when we tend to see an increase in pet walking,combined with intense rainfall events which result in drastically increased pet waste loads washing into the BMPs and Howe Creek. 5 HOWE CREEK UPSTREAM-QUARTERLY INSTREAM SAMPLING 15A NCAC Parameter 12/10/2004 612/2005 9/7/2005 10/18/2005 1/17/2006 5/5/2006 7/17/2006 10/5/2006 2/9/2007 4/30/2007 8/612007 11/28/2007 3/7/2008 4/21/2008 9/2/2008 11/11/2008 2/13/2009 5/5/2009 7/17/2009 11/4/2009 2112/2010 28 Standard SA ORW Total Suspended Solids(mg/L) 4 5 13 11 3 7 7 17 4 6 40 3 4 12 8 4 1 - 12 _ 15 13 4 NS Turbidity(NTU) 2.0 2.9 4.7 18.1 2.2 2.1 5.5 17.5 4.7 5.8 20.5 2.3 2.7 3.2 3.4 9.9 1.2 9.0 8.4 3.8 10.9 <25 Dissolved Oxygen(mg/L) 4.02 , 13.81 2.78 5.00 4.48 4.45 9.82 8.90 4.95 3.62 0.68 3.05 2.22 1.48 4.50 8.43 9.45 4.35 4.05 4.68 8.49 >5 Conductivity(pS/cm) 160 194 137 0.124 0.127 _ 0.160 0.127 0.20 0.810 0.105 0.163 0.088 0.166 0.176 0.114 0.083 0.171 0.150 0.158 0.225 0.205 NS pH(units) 4.65 6.25 5.78 5.60 5.25 4.75 7.04 5.80 5.06 5.96 . 5.74 4.72 4.64 4.50 4.82 4.69 6.23 6.19 5.81 5.30 6.17 6.8-8.5 Temperature(°C) _ 19.9 21.65 21.3 19.4 17.5 18.6 13.7 20.0 13.0 15.2 23.2 14.0 16.8 19.5 20.4 12.8 14.7 21.0 23.0 17.8 12.0 NS Flow(ftls) 0.07 1.99 0 1.0 0.3 0.0 0.2 0.5 0.2 _ 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NS - HOWE CREEK DOWNSTREAM-QUARTERLY INSTREAM SAMPLING 15A NCAC Parameter 12/10/2004 6/2/2006 9/7/2006 10/16/2005 1/17/2006 5/6/2006 7/17/2006 10/11/2006 219/2007 4/30/2007 5/612007 11/28/2007 3/7/2008 4/21/2008 9/2/2008 11/11/2008 2/13/2009 5/5/2009 7/17/2009 1114/2009 2N2/2010 28 Standard _ SA ORW Total Suspended Solids(mg/L) 12 _ 10 15 8 _ 6 31 36 6 5 5 . 13 11 6 9 4 10 4 7 5 1 5 NS Turbidity(NTU) 18.3 6.1 4.3 7.5 4.6 36.9 _ 19.2 6.2 4.6 13.8 20.4 12.0 8.7 1.0 5.9 10.5 5.3 12.4 4.5 2.6 5.0 - <25 Dissolved Oxygen(mg/L) 6.20 14.69 3.83 5.46 6.16 2.37 9.85 4.80 5.30 5.19 0.17. 3.80 4.85 3.75 4.85 5.56 6.02 4.25 4.42 5.05 7.31 >5 Conductivity(µS/cm) _ 145 _ 151 410 0.119 0.114 0.318 0.207 0.22 _ 0.079 0.136 0.156 0.091 0.152 0.206 - 0.091 0.091 0.169 0.232 0.005 0.213 0.171 NS pH(units) 6.47 6.09 6.39 5.83 _ 5.63 6.21 7.75 5.90 6.81 6.60 _ 5.89 5.93 4.98 5.61 6.49 _ 5.57 6.45 7.77 5.79 5.82 6.21 6.8-85 Temperature CC) 21.1 23.37 22.6 19.8 14.7 _ 19.6 10.7 20.0 9.5 11.0 21.4 11.7 14.7 _ 18.0 21.4 10.8 13.8 20.3 22.9 16.4 12.2 NS Flow(ttls) 0.20 NF 0 0.0 - 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 . 0.0 0.2 0.0 0.0 NS RECEIVED JUN 18 2010 BY: Total Suspended Solids- Quarterly Instream Sampling Turbidity- Quarterly Instream Sampling — 40.0 - 45 40 35.0 35 30.0 30 - - I 25.0 --i 25 - 3' , 20 — s - I 20.0 ■Howe Creek Upstream •Howe Creek Upstream 15 15.0 ■ 1 ■Howe Creek Downstream ■Howe Creek Downstream 10 / - •10.0 • , r _ �� I' ll-. 1 pIp `" 8 § p28 28 $ S 8 3 8 s s 1 s s § 8 S 8 9 QQ Pi S s "' °° a .. N N N N N N N N N N N N N .. N N N O § N S N O O ON `Q-' N N N N 51 h oo h N h m\ 09 x' 00 i ' V4 �m n v a PA 8 g C .5 o ``h w p� n'D 4) �V �'h a h0 = 0� .�1 o m 1 .. ... a, ...O \ ei o\o cV \ co m74.2... O`1 fV, u`i n s`-1 "{ N N rn .i �I' v1 h .-� N oo m v � ui 1� .�-� Ni ry O .......... e`i N n ei d' e-1 .-1 N N C O \ \ O \ \ --.-__ -- rl ai ei 'i O _-- Dissolved Oxygen - Quarterly Instream Sampling Conductivity- Quarterly Instream Sampling 16.00 --- -_ 0.900 ---- 1 14.00 -�_ -- 0.800 -- 0.700 -_ ,_._ • 10.00 0.600 ---- _-- -- -- - _-Y i - I 0.500 ..,,-- ._ E_.__- % 8.00 -_____T_ _..-. - _---__. ��__- __._a--__. ._ :.___ _-,-.- ----- ---- -----�---- ■ owe Creek ream 0 400 --.._ - ti H C k Upstream 6.D0 I !, _ _ -_ _ _. Howe Creek Upstream I 0.300 - -- i ! ttHJtItIHHUUH Howe IA to to h 0 CN a --- -- EVil : Creek Downstream 1 1/1 *Ili: •Howe Creek Downstream I s s I s ssssssg °'sal CNCEt N N N N NN` N3 N` ` N N Nmn Inh aI oo.-I i.4 \ \ `n\ 1--..4 ui rn\ om\ to\ N C + i � ` `\ eo en �, n +1-.. _ —� pH - Quarterly Instream Sampling Temperature - Quarterly Instream Sampling - - — -- - 29.0 -- -- 7.50 -- -- - - -- - 24.0 - -- - --- -- 7.00 _ -. 6.00 _ _ 11111 r , - , ■Howepream140 - INral m_i ' ' . I1 ■Howeonstream ' ii ': : uuii 4.5D - I I 1 r 1111r 11 1 � 11 III l 1p tp pp � , pp� p � � 0 p LA NhhO O `"� O to of to t0 to tO h N h h 00 00 OO OD" Of C1 O1 ° O ! hnHUHIHH § o § N § g g § H la g s s si MIII ifi ` N O N C °I .hi 1 e O e UO C`" N °' 1 to N ao m HOWE CREEK UPSTREAM-STORM EVENT SAMPLING 15A NCAC 2B Parameter 121 12004 7/21/2006 8/23/2005 11(21/2005 3/0/2006 8/5/2006 7/11/2005 11/7/2008 2/1/2007 4111/2007 9/2012007 12/21/2007 2/2112008 111012001 9/512008 11/3/2008 3/18/1009 5/7/2009 6/21/2009 11/1012009 1/21/2010 Standard SA ORW Total Suspended Solids(mg1L) 4 5 7 51 4 8 10 4 4 4 5 7 5 8 11 27 12 12 41 19 3 NS Turbidity1NTU) 1.8 1.3 3.4 14.6 3.3 6.7 _ 9.0 3.1 2.7 4.7 7.0 18.9 6.6 11,9 6.6 10.8 6.0 7.8 29.9 10.0 2.6 Q5 Dissolved Oxygen(mglL) 4.60 3.51 2.22 9.21 5.50 9.19 5.50 4.60 5.45 4.49 1.78 4.59 4.40 5,50 3.87 5.15 6.66 3.05 7.33 4.25 9.05 >5 Conductivity(pS/cm) 168 0.137 122 0.048 0.128 0.148 0.102 0.2 F 0.077 0.084 0.079 0.085 0.201 0.092 0.097 0.133 0.055 0.149 0.031 F 0.201 0.186 NS pH(units) 6.35 5.71 6.34 8.60 542 _ 5.77 6.40 4.90 , 4.70 5.68 6A8 5A0 _ 5,57 6.40 5.78 5.26 6,22 5.91 6.85 5.25 6.01 6.8-8.5 Temperature(DC) 20.5 21.3 _ 22.3 15.1 16.2 24.7 27.7 18.0 12.5 16.7 21.5 12.6 16.3 22,0 21.6 16.1 15.4 20,2 24.9 20.1 12.0 NS Flow(ftls) 0.13 0.35 0.3 2.3 0.50 0.4 0.5 • 0.5 1.00 0.20 0.00 0.0 0.50 0.00 0.00 0.00 0.00 0.00 1.00 0.00 0.20 NS HOWE CREEK DOWNSTREAM-STORM EVENT SAMPLING 154 NCAC 2B Parameter 12(912004 7/21/2005 6(23/2005 11/21/2005 3(6/2005 8/612004 7/11/2006 1117/2008 21112007 4/11/2007 9/20/2007 12/21/2007 2/28/2008 8/20/2003 9/5/2005 11/3/2008 3/16/2009 6/1/2009 8121/2009 11/1012009 1/21/2010 Standard _ SA 01W Total Suspended Solids OWL) 8 4 50 13 5 8 40 7 6 5 9 7 14 89 6 11 19 7 50 10 3 NS Turbidity(NTU) 9.0 6.3 30.3 12.5 7.2 9.4 42.6 8.0 11.6 6.0 10.4 7.1 21.8 60.5 5.9 17.8 29.0 13.1 61.9 11.3 6.1 45 Dissolved Oxygen(mg/L) 6.11 3.82 2.44 - 9.29 7.73 6.97 5.75 4.70 3.01 6.15 0.59 7.40 5,93 0.20 4A1 5.50 7.91 3.30 7.15 4.86 6.89 >5 Conductivity 0&Slcm) 159 0.134 219 0.042 0.111 _ 0.196 0.143 _ 022 0.045 0.092 0.175 0.097 0.171 _ 0.291 0.098 0.163 0.150 0.177 0.048 0.205 0.149 NS ® pH Omits) 6.19 6.42 7.22 8.89 5.95 6.86 7.80 6.20 5.48 6.40 6.60 5.91 5.97 5.62 6.06 6.10 6.25 6.68 6.81 5.65 6.05 6.8.8.5 Temperature('C1 18.6 27.0 25.6 15.6 14.1 24.1 25.5 16.0 8.8 15.2 22.0 9.3 V 14.7 20.6 23.0 14.7 14,2 20.7 25.5 19.8 12.4 NS . Flow(lt/s) 0.11 NF 0.0 2.4 0,40 0.0 0.0 0.0 0.00 0.00 0,00 _ 0.0 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 NS RAINFALL DATA 12(9/2004 7/21/2005 5/23/2005 11/21/2005 3/5/2006 615/2006 711/2008 1117/2001 2/1/2007 4111/2007 9/20/2007 12121/2007 2/2812006 1120/2000 9/5/2008 11/3/2008 3/16/2009 5/7/2009 W21/2009 1111012005 1/21/2010 sample day rainfall amount 0.2 0.1 0A- 4 01 3 0.2 0.6 0 0 0.7 1.5 0.4 1 0 0 1.7 0.3 4.5 0.8 0 previous rainfall amount 0.4 0.6 0.1 3.6 1.7 0.3, 0.5 1.4 0.4 0.1 0.7 1.5 1.5 2.5 0.8 1.4 2 0.1 0.1 0.4 1.9 0 days between events 8 5 3 5 7_ 16 10 7 2 20 2 3 3 3 6_ 5 13 1 3 10 2 Total Suspended Solids-Quarterly Storm Event Sampling Turbidity-Quarterly Storm Event Sampling — 70.0 90 ------._._-_.-___—_-----._.--•-------- -._.------- - 80 - ______ ----• L- -- . . _ ii.._ _____ __ 70 `-- ------- _.- 6D 50 .- - ---- _ ___----___.-.- - f ■HoweCrcekUpstream Howe Creek Upstream 30.0 --- 3 Howe Creak Downstream • 40 - _. --- ------- -. -• __._._-- Howe Creek Downstream 20.0 - ---- ----- -•• --- , _ , 20 -- - - - - 10.0 A .111_ III ja ill all dl t L i _ail- ___ _11 -ii-.4 wo __IL_ mil uo n N. g o 8 S 8 8L1 8 S C �' $ C d g `+ v. 17`Q�� N N N "�"' a tom'. N e % p '" o� N " N .y a�' o. " a m ....:to .� m oo .r -- I Dissolved Oxygen-Quarterly Storm Event Sampling Conductivity-Quarterly Storm Event Sampling ----- -- ---- — -- D 350 , — 10.00 _-- -_ - i 9.00 -- ------------------...___. 0300 - -.. . ; _. - --_ 6.00 ---- - - - - i - -- _,.. _---- -- - I I 1 A ! 1 " -LII a Howe e m .15D - - . - - Howe Creek Downstream Croak Upstream Howe Creek Upstream 4.00 ( ,Howe Creek Downstream ii. - 0.100 _ W - 3.00 Elil ill n pH-Quarterly Storm Event Sampling 29,0 7 Temperature-Quarterly Storm Event Sampling 8.O0 — --._._-... 24.0 -- - - 1 . 7.00 -- - 6.50 1 - - - - 19.0 ii IkihilhitiiI:i -•- — -- Howc Crock Upstream 1 - - - — - "Howe Creek Downstream-• 400 - ••' ... ._.. ___ ._- ... - . .. . T... _-.� _ . _ f0 Q` O • 3 o rye a ,� a m �i m ^ al ti Historical Fecal Coliform Values December 2004-March 2010 1800 - ___._..--. .-- .--. _-- Mayfaire Town Center - - -- — MACTEC Project No.6550-04-0186 1600 -_- --._. - -----_-- - qq gI 1400 --,.. - — --- - _... _ __ - .--r - -- • 1 . 4 1200 1000 -- t ii v i-: 800 .. O - I t) 600 T -- -- f 1 400 -_,�__. - i 1 I I 200 - -- ' - _ _ 11 / , f \iik ., v / , 1. , .......rmajillillillilibL.............. ' lalb... Dec-04 Mar-05 Jun-05 Sep-05 Dec-05 Mar-06 Jun-06 Sep-06 Dec-06 Mar-07 Jun-07 Sep-07 Dec-07 Mar-08 Jun-08 Sep-08 Dec-08 Mar-09 Jun-09 Sep-09 Dec-09 Mar-10 -� Notes: Howe Creek is classified a Class SA Outstanding Resource Water(SA ORW). Fecal Coliform not to exceed a medlanof 14 colonies/100 mL of water based on 5 readings In a 30-day period. I r +Howe Creek Upstream Howe Creek Downstream POND 1 INFLOW-STORM EVENT SAMPLING Parameter 12/9/2004 7121/2005 8/23/2005 11/21/2005 3/6/2006 61612006 7/11/2006 11/7/2006 21/2007 4/1112007 912012007 12/21/2007 2/28/2005 612012008 0/612008 11/31200$ 3/10009 51712009 6/212009 11110/1009 1/21/2010 Total Suspended Solids(mg/L) l0 981 91 44 9 5 6 17 16 9 5 2 9 14 10 8 28 10 8 6 2 Turbidity(NTU) 12.0 62.7 - 18.3 9.5 9.6 4,8 6.0 35.2 32.5 20,7 3.9 3.6 17.8 24.7 11.0 27.3 47.0 11.0 4.9 9.3 3.1 Dissolved Oxygen(mgIL) 7.62 5.39 8.74 7.80 8.11 3.99 4.65 8.10 6,00 8.71 3.82 8.66 8.40 7.23 3.43 7.15 6.51 6,01 5.71 3.85 10.41 Conductivity(NSlem) 249 0.061 24 0.029 0.046 0.065 0.051 0.05 0.029 0.037 0,028 0.046 0.040 0.070 0.021 0.041 0.071 0.056 0.043 0.040 0.038 pH(unite) 7.04 7.67 6.01 7.43 7.26 6.70 8.65 7.00 5.62 7.44 5.97 6.70 5.48 6.86 6.54 6.45 6.65 6.67 6.91 7.02 5.31 Temperature(°C) 17.8 31.6 26.5 14.9 13.2 24.4 27.7 15.0 6.8 14.9 24.0 10.7 ' 14.1 26.9 25.8 15.7 14.6 24.5 , 30.8 20.5 12.1 Flow(ills) 0.07 0.18 0.3 0 0.00 0.0 0.0 0.0 0.20 0.00 0.00 0.0 0.00 0.00 0.00 0.00 0.00 0.00 , 0.00 0.00 0.00 POND 1 OUTFLOW-STORM EVENT SAMPLING Parameter 1219/2004 7/21/2005 8/23/2005 11/21/2005 3/6/2006 615/2006 7/11/2006 111712006 2/112007 4/11/2007 9120/2007 12/21/2007 212612006 6/20/2008 91512006 11/3/2008 311612009 5/7/2009 8/2112009 11/10/2000 1/21/2010 _ 5 8 13 5 6 5 8 4 6 4 3 9 2 Total Suspended Solids(mglLl 2 1 8 3 2 5 1 Turbidity(NTU) 1.4 1.1 _ 7.1 3.7 2.8 1.2 2.1 14.3 4.4 25.0 11.2 12.8 12.7 12.2 5.8 13.0 5.8 2.4 7.7 3.4 Dissolved Oxygen(m�IL) C 5.40 6,40 9.35 9.21 7.48 8.03 8.60 7.50 8,20 3.87 9.85 8.07 6.29 5.56 8.44 8.01 4.71 8.11 7.66 9.99 0.052 49 0.039 0.045 0.059 0.047 0.07 0.031 0.04 0.042 0.052 0.052 0.068 0.028 0.040 0.055 0.044 0.027 0.054 0.029 Conductivity(pS1cml _ _ _ c pH(YI1NeL x 7.00 7.34 7.38 _ 7.88 6.79 10.47 8.00 6.03 7.53 7.00 6.97 5.65 7.03 7.09 6.94 7.66 7.25 7.95 8.05 6.37 Temperature(°C) 30.5 30.6 14.5 14.8 25.7 29.2 15.0 6.3 15.3 23.6 10.5 15.5 26,1 25.9 _ 15.3 14.0 24 5 30.2 19.2 11.6 Flow(ftls) 0.08 1.8 1.3 0.30 0.0 0.0 0.2 0.20 0.00 0.00 0.0 0.00 0.50 0.00 0.00 0.00 0.00 0.00 0.50 0.00 RAINFALL DATA 1219/2004 7/21/200i 8/2312005 11/21/2005 3/612006 6/512006 7M112006 11/712006 211/2007 4/1112007 9120/2007 12121/2007 2/26/2008 8/20/2008 9/6/2008 1112/2008 311512009 5/712000 8/21/2000 11110/2000 1/21/2010 sample day rainfall amount 0.2 0.1 OA 4 0.1 3 0.2 0.6 0 0 0.7 1.5 0.4 1 0 0 1.7 0.3 4.5 0.8 0 previous rainfall amount 0.4 0.6_ 0.1 3.6 1.7 0.3 0.5 1.4_ 0.4 0.1 0.7 1,5 1.5 2.5 0.88 1.4 12 0.11 3 0.1 0.44 1.9 #days between events 8 5 3 5 7 16 10 7 2 20 Pond 1 Pond 1 Total Suspended Solids-Quarterly Storm Event Sampling Turbidity-Quarterly Storm Event Sampling so.a _. 35.0 L _ _.. _ 25Ai -- II 1 50 .-, _-.___----- ____ ■Inflow 40 MI: ■Inflow 20.0 — 30 - ---- -- - - - - ■Outflow 15.0 -_ --- III —__ �'- - - - ---_- __ ■Outflow irit- -7--inarL_iladt-TWIPralilL,ilial_AC.,. 5.0 in IL , L-----"L, 'II ._ _AV_ -'' . _ " 11 isil ,J1IL, 0 _miii . IIILL_AL-___11111dILL._,_ ., Q g .i .a Pond 1 Conductivity-Quarterly Storm Event Sampling Dissolved Oxygen-Quarterly Storm Event Sampling 0.08 -I 0.05 -iii Liltili 8.00 E Inflow ❑Inllow { 0.03 iii .outflow 2.00 0.01 ri a S vr. g m Pond 1 Temperature-Quarterly Storm Event Sampling pH-Quarterly Storm Event Sampling 34•0 _. ____ . ____...__ _: __ .... 24.0 8.00 - - ---. ---- - - -- 19.0 - -_- S' E Inflow ' 7.00 - —' f9lnfbw Outflow 14.0 - 6A0tillidtt-- _ --_--- FOutflow It 1 9.04.00 - r 4.0 I IlUIttUI I POND 3 INPLOW-STORM EVENT SAMPUNG Parameter 12/9/2004 7/211/2005 8/2312005 11/21/2005 3/8/200$ 8/5/2005 7/11/2008 11/7/2008 2/1/2007 4/11/2007 9/2012007 12/21/2007 2/2612009 6/2012008 9/5/2005 11/3/2008 3/18/2009 5R/2009 8/2112009 11/10/2009 1/21/2010 Total Suspended Solids(mg1L1 2 7 3 13 2 3 7 2 1 2 5 4 9 3 1 1 2 7 1 1 3 Turbid NTU 2.0 5.8 2.2 12.1 3 2.7 2.4. 1.7 3.1 4.1 4.0 3.6 12.8 3.8 1.8 2.0 3.0 5.9 1.6 1.0 3,3 Dissolved Oxygen(mg1L) 7.11 8.27 5.89 7.40 8.47 5.88 6.36 10.50 6.93 10,02 3,81 8.92 9.44 5.95 5.51 7.47 6.61 5.96 6.33 8,00 9.57 Conductivity(pS/cm) 152 0.128 85 0.033 0.071 0.115 0.065 0.16 0.072 0.066 0.053 0,051 0.058 0.140 0,041 0.060 0.119 0.084 0.079 0.114 0.082 pH(units) 8.81 9.00 8.45 7.28 7.56 7.49 9.33 7.60 5.20 8,74 7.30 7.09 6,58 6,32 8.14 7.10 7.31 7,27 8.41 8.50 6.09 Temperature(8C1 18.5 32.0 29.9 15.4 13.6 25.6 29.3 15.0 _ 6.8 15.5 23,7 11.1 14,3 27.1 26.7 15.5 14.2 24.1 30.5 21.5 11.9 Flow(Ws) I 0.09 ' 0.08 0 0 0.00 0.0 0.0 _ 0.0 0.00 0.00 0.00 0.0 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 POND 3 OUTFLOW-STORM EVENT SAMPUNG Parameter 12/9/2004 7/21/2005 8/23/2005 11/21/2005 310/2008 5/5/2008 7/11/2005 11/7/2005 211/2007 4111/2007 9/20/2007 12/21/2007 2/26/2000 5120/2008 915/2008 11/3/2006 3/18/2009 517/2009 8121/2009 11/10/2009 1121/2010 Total Suspended Solids(mg1L) 9 2 4 4 1 3 8 10 18 1 2 I 33 6 6 4 Turbldlty(NTU) 4.9 2.9 1.9 3.4 1.4 3.5 7.2 11.9 7.7 2.4 2.1 3.0 , 28.5 4.2 3.2 4.3 Dissolved Oxygen(mglL) 8 9.12 10.54 w 10.90 5.89 9.23 4.09 9.80 9.04 6.66 5.07 7.73 6.91 5,88 6.55 3.97 9,85 a a a Conductivity(i$Icm) S 0.083 0.076 v, 0.29 0.064 0.059 0.045 0.049 0,075 0.128 0.031 0.058 . 0,109 0.069 0.068 0.114 0.046 z F 7.34 7.39 6.05 7.60 7.25 7.00 7.47 7.63 8.32 6.86 6.51 z z z °z 8.10 5.82 10.00 pH(unite) 7.57 9.26 0 -- Temperature(°C) 14.8 14.6 17.0 7.1 16,1 25.0 10.6 14.9 26.7 26.8 15.6 14.4 24.0 29.4 20.0 12.0 Flow(fUs) 2.9 0.00 0.0 0.00 0.00 0.00 0,0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 RAINFALL DATA 12111/2O04 7/21/2005 9123/2006 11/2112005 3//2008 8/8/2005 7/1112008 11/7/2006 2/1/2007 4/11/2007 9/2012007 12/21/2007 2/25/2008 6/20/2005 915/2008 11/3/20011 3116/2009 5/7/2009 9721/2009 11/1012009 1/21/2010 sample day rainfall amount 0.2 0.1 0.4 4 0.1 3, 0.2 0.6 0 0 0.7 1.5 0.4 1 0 0 1,7 0.3 4.5 0.8 0 previous rainfall amount 0.4 0.6 0.1 3.6 1.7 0.3 0.5 1.4 0.4 0.1 0.7 1.5 1.5 2.5 0.8 1.4 2 0.1 0.1 0.4 1.9 #days between events 8 5 3 5 7_ 16 10 7 2 20 2 3 3 3 6 5 13 1 3 10 2 1 Pond 3 Total Suspended Solids-Quarterly Storm Event Sampling Turbidity-Quarterly Storm Event Sampling -- _ I _. ._ —_ 30 25 -- ------- ----- _ _- -- y. ..__....- - -.._ 20A .. ---- -_----- - _ ----- _ .- --- ---...----------..., p ---- - - -___ - ----- - ___ - 35.0 _-__-------- o Inflow -_.. . 15 ----- - - — - - - - - ®I�rtlow ■ �------ ___.----__,_ .......-------_._-_.-_. _ Outflow 11 a Outflow _._ _. __ __ 5 I EIk - J. _ _ ___ _ _____ ._ g __ ______ _ . _. _ __._ _ �� _ i_... .rai mil Aim b. 1 'A 1 g g g R § 1 a § s 1 § . g. 1 . 1 0, g g OA § § § § § i 1 § Pond 3 Pond 3 Dissolved Oxygen-Quarterly Storm Event Sampling I Conductivity-Quarterly Storm Event Sampling 12.00 -- 0.350 -.-_ 10.00 0.300 - 0,250 -- 8.00 , .i ' 0.200 - - Olnflow 0.150 .-..- 0lnflow 4.00 ■Outflow ■Outflow 0.100 2.00 0.050 - a.� IIi O.Ooo S. II w C I III II gamg . N S. N I M Pond 3 Pond 3 pH-Quarterly Storm Event Sampling Temperature-Quarterly Storm Event Sampling 11.00 ..... 1 i V a Inflow ■ 7.00 _ __ _ ■Outflow ::: j--. __ -- _ - -uoutflow _ 40 , T , 4.00 �- . a .� 1 1 1 § o ( 1111111111111 POND 4 INFLOW-STORM EVENT SAMPLING Parameter 12/9/2004 7/21/2005 8/234005 11/21/2005 3/8/2008 6/5/2008 7/11/2008 11/7/2008 2/1/2007 4/11/2007 9/20/2007 12/21/2007 2/2812008 8/20/2006 9/5/2008 11l3/2006 311812009 5f7!1009 61211200E 111101200E 1/21/2010 Total Suspended Solids(mg/L) 4 15 7 ' 8 3 2' 18 2 3 5 8 7 9 12 24 2 19 4 2 10 5 Turbid! NTU) 4.7 8.2 4.4 4.8 5.4 2.2 11.5 2.3 4,7 5.4 14,2 8.2 24.1 9.4 5.9 2.7 28.0 6.9 2.7 3.6 4.2 Fecal Colifonn(colonies/100 mL) 13 91 3700 4400 19 230 150 6000 19 9 1546 700 46 1455 3000 19 9 8000 88000 12000 9 Dissolved Oxygen(mg/L) 6.98 6.65 5.01 8.32 8.10 8,09 5.17 9.30 5.50 7.60 3.60 10.72 8.57 5.55 3.54 7,87 6.97 1.01 8.10 5.30 10.51 Conductivit ( S/cm) 107 0.070 63 0.054 0.055 0.068 0.043 0.09 0.04 0.052 0.041 0.026 0.071 0.084 0.012 0.040 0.084 0.074 0,033 0.105 0.053 pH(units) 7.25 8.44 7.60 7.77 7.34 8,13 10.18 7.10 5.33 9,37 7.00 7.13 6.36 6.94 6.76 6.87 7.52 7.51 8.35 6.87 6.12 Temperature(°C) 17.E • 32.4 30.2 14.5 14.6 26.0 29.5 16.0 6.7 15.9 23,8 10.8 15,0 26.2 25.8 15.7 14.1 24.2 30.1 20.5 11.8 Flow(ft/s) 0.06 0.04 0 0 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.0 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 POND 4 OUTFLOW-STORM EVENT SAMPLING Parameter 12/9/2004 7/21/2005 8/23/2005 11/21/2005 3/6/2008 6/5/2005 7/11/2008 11/7/2006 2/1/2007 4/11/2007 9/20/2007 12/212007 2/28/2008 6/20/2006 9/5/2006 11/3/2000 3/18/2009 5/7/2009 5/21/2009 11/10/2009 1/21/2010 7 31 11 18 3 1 4 12 5 4 3 Total Suspended Solids(mg/1) _ 9 2 2 1 3 37 - Turbidity(NTU) 5.8 53 1.3 1.3 4.6 9.8 15.5 _ 42.6 25.2 19.1 3.8 1.8 9.0 9.1 4.2 10.9 3.2 Fecal Caliform(colonles/100 mL) 1600 19 9 9 19 9 60000 420 28 210 28 19 9 9 36000 2900 37 A 0 W C] Dissolved Oxygen(mg/L) a 9.35 8.12 9.67 ia1 9.80 6.35 5.70 3.51 8,10 8.50 5.52 4.08 7.85 8.03 5,65 7.11 7.70 11.35 Conductivity(NS/crrl) E o O 0.053 0.054 0.071 0.09 0.04 0.048 0.040 0.057 0.074 0.087 0.034 0.077 0,082 0.058 0.027 0.091 0.065 z z z z PH(unit!) 7.53 7,50 9.38 7.50 5.80 964 6.83 7,04 6.81 7.13 7.00 7.13 7.81 7.62 8.42 7.41 Temperature(°C) 14.5 14.4 26.1 16.0 7.0 15.9 23.9 9.8 15.2 27.4 26,4 14.6 14.0 24.8 28.3 19.5 11.6 Flow(8/s) 0.6 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 RAINFALL DATA 12/9/2004 7/2112008 8/23/4008 11121/2005 3/6/4006 El8/200e 7/112005 11/7/2006 2/1/2007 4/11/2007 9/20/2007 12/21/2007 2/26/2006 8/20/2005 9/8/2004 11/3/2006 3N612009 5/7/2009 821/2009 111101400E 1/21/2010 0.4 1 0 0 1.7 0.3 4.5 0.8 0 1.5 sample day rainfall amount 0.2 0.1 0.4_ 4 0.1 3 0.2 0.6 0 0 0.70.1 0.1 0.8 10 previous rainfall amount 0.4 0.6 0.1 3.6 1.7 0.3 0.5 1.4 0.4_ 0.1 0.7 1.5 1.5 2.5 0.8 1.4 • 210 2 #days between events 8 5 3 5 7 16 10 7 2 20 2 3 3 3 6 5 13 1 3 Pond 4 Pond 4 • Total Suspended Solids-Quarterly Storm Event Sampling Turbidity-Quarterly Storm Event Sampling -�_ `--1 45.0 — 35 _ . __ --.- 40.0 - - �.0 .1_ --- - --- - . ------ 1 20.0 fV,Inflow _ -_ _ - J - - . .... --- -- a Outflow _.__—___ - _— i0utflow 15. --- ______________ .. _____... _—.ima_ __— ____________ 0 $ n 8 g I I 8 I 8 8 o eo Pond 4 1 Pond 4 Dissolved Oxygen Quarterly Storm Event Sampling Conductivity-Quarterly Storm Event Sampling -- --- 12.00 10.00 --- - - . --.- -- 1D.00 L-. - EIIII1iiIIIiIIJL $ I 6.00 1■Inflowr Outflow4.OD ,__ ■Outflow 1 I 2.00I 2.00 I- 0.00 . ._ 8% 8 8 S 8 8 8 § § s § 2 1 § o 1 1 T. s Pond 4 Pond 4 pH-Quarterly Storm Event Sampling Temperature-Quarterly Storm Event Sampling moo . 34.0 - i--- ________ .. 7.00 — 19.0 1111 8lrflow _ _14.0 �. --ag :: 9.0.. �_. 0 PONDS-QUARTERLY FECAL COLIFORM STORM EVENT SAMPLING 11 9/20/2007 12/21/2007 2/26/2008 6/20/2008 9/5/2008 11/3/2008 3/16/2009 5/7/2009 8/21/2009 11/10/2009 1/21/20101 Fina�liaNFaern(oolonios/100ere6) 12/9/2004 a/a3/aA05 8/23/2005 11/21/2003 3/6/2006 6/5/2006 7/11/2006 11/•1/2006 2/1/2007 4/ /20Q7 Pond 1 Inflow 36 59,000 5400 0000 19 9 300 64 9 9 658 108 10 637 2100 217 28 37 163 11000 9 91 520 9 10 y 36000 26000 Pond 1 Outflow � NS 55 1 800 4500 19 9 4 19 9 28 2700 I86 10 . 3000_� — ' L 46 19 9 163 19 19 9 9 546 10 37 Pond 3 Inflow 4 1$ 73 2100 19 19 82 37 9 9 28 f 63 19 19 9 9 7200 2100 9 Pond 3 Outflow NS NI NS 1700 20 t NS NI 9 9 00 — 00= 36 700 46 000 1455 3000 19 9 8000 �� 12000 9 Pond 4lnflow 13 91 3700 4400 19 23b 6000 19 9 60000 420 28 210 28 19 9 9 36000 2900 37 Pond 4 Outflow NS I NS NS 1800 19 9 NS 9 I Pond 1 Fecal Coliform-Quarterly Storm Event Sampling 14000 12000 .......-...- — ----•— i 1 I 1 10000 I � i18000 — — ...=•outflow i • Inflow 2000 )11111 N .i '? `�i n vIi m I- Pond 3 Fecal Coliform-Quarterly Storm Event Sampling 14000 - - 12000 - -- I f � 100001— I -- 1 soon -- - Outflow Inflow 6000 4000 - - -- 2000 o � "s g s § § s § § §ro `N § N N N _ Ii lfl N`N s • Pond 4 Fecal Coliform-Quarterly Storm Event Sampling 14000 �— — 12000 10000 e woo -i-outflow -11-Inflow 6000 L.._-. -- ------ ---i ----- --- - --- i 4000 • 2900 I � i I I 1 _ ' 1 � I I i Qm pm m pm CC�n �pn sn �n, mp m pppm m Nn Nrn a ems p� O 8NV O 4 N {�O ` ei7 eta a eta m O vl M m f+ N O T. S .S REC'D J UN 3 2010 Total Stormwater Solutions, Inc. June 3,2010 Ms.Georgette Scott NC Division of Water Quality h. 127 Cardinal Drive Ext. Wilmington,NC 28405 J�N 0 3 0 Subject: Permit No.SW8 010512 Renewal Mayfaire Town Center (Phase 1) REQUEST to ELIMINATE INSTREAM and BMP MONITORING REQUIREMENTS Dear Ms. Scott: On behalf of Mayfaire Management Company,LLC,Total Stormwater Solutions,Inc.(TSS)requests the elimination of the monitoring requirements as outlined in Permit No. SW8 010512 Renewal, dated January 18,2008. Per section III, item 8 of the subject permit,the permittee may petition DWQ to have the monitoring requirements modified,reduced, or eliminated after 10 valid data points have been submitted for each BMP. Mayfaire Management Company,LLC has diligently had the required monitoring tests performed, and provided the required quarterly reports to DWQ since December 2004. Total Stormwater Solutions has compiled all of the data contained in these reports. Based on our analysis,the difference in the upstream and downstream parameter data is not statistically significant(i.e.it varies greatly and shows no obvious trend). As a result of the analysis, 5+years of data having been provided, the extreme costs associated with continued tests and reporting,and the development having stormwater control measures above and beyond normal,TSS respectfully requests that the Mayfaire Town Center monitoring requirements be eliminated effective June 30,2010. Please do not hesitate to call or email me with any questions. I can be reached at 910.622.7844. We are looking forward to a productive meeting with Ms.Linda Lewis of your office on Monday,June 7 at 11:00. Sincerely, Tammy M. gPivey President Cc: Linda Lewis,DWQ Dan Rahe,Director of Construction,Mayfaire I,LLC Triangle Area Office: Wilmington Area Office: *BMP Inspection,Maintenance, PO Box 341 2101 Plaza Drive Installation&Recordkeeping Fuquay-Varina,NC 27526 Wilmington,NC 28405 *Wetlands&Buffer Restoration, 919-557-4682 910-622-7844 Creation&Enhancement November 23, 2009 10 am Meeting Notes SW8 011119 The Village at Mayfaire Linda Lewis Georgette Scott Todd Edmiston, CAMS Larry Sneeden The meeting was requested by the permittee to revisit the sampling requirements. The permittee contends that the sampling doesn't provide relevant data. The meeting was to hash out a new sampling program such that it can provide sufficient results to DWQ to allow the sampling to be discontinued. Baseline information of the pond inflow constituents may be gleaned from the 2007 and 2008 quarterly sampling reports. Construction was nearing an end in the middle of 2007, so the first and second quarter results may skew the data. The results will be submitted to DWQ for approval. If DWQ feels that more data is needed, additional baseline inflow sampling will need to be done. No sampling of the inflow to the infiltration basin at the forcemain discharge points. This runoff will be infiltrated, so knowing what's in it is probably pointless, since it is not being discharged. Inspections will be made monthly and during and after a design storm event to determine if the system is handling the 1.5" event without discharging. The outflow from a minimum of 4 events that exceed the 1.5" design storm and that produce a discharge to the vegetated filters will need to be sampled during the upcoming year in order to consider eliminating the sampling. As many events as possible should be sampled. If less than 4 events are sampled in the upcoming year, DWQ will not consider eliminating the sampling until more events are sampled. Pond #1 does not have a bypass "pipe" to the vegetated filter from the outlet structure, where a sample can be pulled easily. There is only a spillway. A Upon approval of the baseline constituents in the inflow, the permit's monitoring will be modified such that it will be up for elimination at the end of 1 year, with at least 4 events sampled, no discharge of the 1.5" design storm, and a healthy reduction of pollutants from inflow to overflow at the vegetated filter. The sampling in the vegetated filter should take place at the beginning of the filter, not at the end. If it's been dry, the pollutants in the filter may be resuspended in the runoff, skewing the results. 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Sullins Dee Freeman Governor Director Secretary October 13, 2009 Todd Edmiston The Village at Mayfaire COA c/o CAMS 1630 Military Cutoff Road, Suite 108 Wilmington, NC 28403 Subject: Sampling Requirements The Village at Mayfaire Stormwater Project No. SW8 011119 New Hanover County Dear Mr. Edmiston: The Division received your request to eliminate the monitoring requirements from permit SW8 011119 for The Village at Mayfaire. Your request brings up several valid points however it appears that your request to eliminate monitoring is based on your belief that it is not producing any relevant data. DWQ's current process for determining if a monitoring requirement should be eliminated is based on the review of data submitted by the permittee. Based on your review and analysis this data does not meet this criterion. Therefore in order for us to make an informed decision about this monitoring requirement, we need to discuss how to modify the sampling program for this site such that more relevant data is gathered. First, I propose that rather than sampling when it rains any amount less than the design storm of 1.5", let's consider a thorough quarterly inspection of the system during and after any design storm event, at the outlet/bypass structures, the forcemain outlets, the infiltration system and the vegetated filters to see if the design storm is being picked up, channeled, pumped and infiltrated without bypassing. Second, I propose a more flexible number of sampling events, with 2 being the minimum, and 4 being the maximum. This will take drier years into consideration, where only 2 storms might produce enough runoff to be sampled, while still allowing for sampling in each quarter during wetter years. Only larger storm events that are expected to be in excess of the design storm, and that produce a discharge to the vegetated filter, would be sampled. Third, I propose to change the sampling locations in order to generate more relevant data. Samples would be taken at the last catch basin leading into each pond, and at the 2 points where the forcemains from the ponds enter the spreader swale of the infiltration basin during the first flush (1.5"). The larger storm event sampling would be subject to the requirement for the preceding 3 days to be without rain. This will provide a good basis for-the water quality entering the storage ponds and the infiltration basin. Wilmington Regional Office 127 Cardinal Drive Extension,Wilmington,North Carolina 28405 _One Phone:910-796-7715\FAX:910-350-2004 1Customer Service:1-877-623-6748 Carolina Internet www.ncwaterqualitr.org atura'!Ij An Equal Opportunity I Affirmative Action Employer Mr. Edmiston October 13, 2009 Permit Number SW8 011119 Later in the storm, when the vegetated filters become engaged, samples would be taken at each bypass structure overflow into the 3 vegetated filters at Ponds 1, 2 & 3. This will provide meaningful data on the water quality entering Howe Creek from the excess design storm from this development. A comparison of the pollutants in the runoff entering the infiltration basin vs. the pollutants in the bypassed runoff would provide relevant data. If desired, two of the quarterly inspections can be conducted concurrent with the semi-annual sampling events. Perhaps we also need to address the timing of samples. As you have pointed out, rain doesn't conveniently fall only between the hours of 8am and 5pm M-F and labs are not necessarily open on the weekends or after business hours to accept samples. I don't know how to address this as it is really a matter of listening to the weather forecasts, planning ahead and being lucky in the timing of the rain. A reduction to a minimum of 2 sampling events per year would appear to help meet this requirement. This would appear to be a more relaxed sampling program that would provide more meaningful data without the onus of sampling on a quarterly basis when no discharge is occurring. It seems that we've had several years with less than normal rainfall amounts, with fewer target storms in that quarter to produce runoff. I don't anticipate that will always be a concern, as there will most certainly be wet years with more rainfall than average, where there will be multiple opportunities for sampling. The reduction to a minimum of 2 sampling events per year should accommodate the drier years. Please call either Georgette Scott or me to set up a meeting to discuss these proposed new monitoring requirements and offer any suggestions for improvement. If you have any questions, please do not hesitate to contact me at (910) 796-7215 or email me at Iinda.lewis@ncdenr.gov. Sincerely, • v IC /v ` Linda Lewis Environmental Engineer III GDS/arl: S:IWQS\STORMWATERILETTERS120091011119.oct09 cc: Larry Sneeden, P.E. Central Files Wilmington Regional Office Stormwater File Page 2 of 2 If VILLAGE AT MAYFAIRE August 31,2009 RECE Yn- Georgette Scott S E P 0 2 2009 NCDENR DWQ 127 Cardinal Drive Extension BY: Wilmington, NC 28405 RE:Stormwater Sampling Requirements The Village at Mayfaire Stormwater Permit SW8 011119 Dear Ms Scott, The stormwater permit for The Village at Mayfaire contains special stormwater monitoring requirements for the discharge stream and BMPs. This letter is our petition to eliminate these monitoring requirements as provided under Section III of the permit. The stormwater management system consists of three wet detention ponds and an infiltration basin. Stormwater is collected in the wet detention basins. The 2-5 day drawdown of the design storm in the ponds is accomplished by pumping the drawdown water from an intake in the pond outlet structures to the infiltration basin. For storm events greater than the 1.5" design storm the overflow from the wet detention basins flows through vegetated filters before off-site discharge. There is no overflow of the infiltration basin as it receives only the design storm drawdown flow, not direct runoff. A small holding pond collects runoff from the entrance road for pumping to a wet detention basin. The monitoring requirements are for quarterly in-stream sampling during rain events upstream and downstream of the project, and concurrent sampling of the inflow and discharge of the BMPs (wet detention ponds). The inflow samples are taken during the first 30 minutes of discernible inflow from a representative storm event (>0.1 inches of rain), and the outflow samples are to be taken in the first 30 minutes of discharge as a result of that event. Sample locations were determined in conjunction with NCDENR. The permit provides specific conditions for the modification, reduction, or elimination of the monitoring requirements. This request does not fully address those conditions. We believe our request for elimination is justified for the following reasons: In-stream Monitoring:The in-stream sampling locations are located about 300 feet apart on the creek. In the 300 feet between samples, there are no point source discharges from the project for the design storm and only very minor discharges from impervious surfaces (sidewalks). This stream does not respond immediately to a rainfall event and is typically at zero flow (stagnant) during a small but representative storm event.With the very limited flow and no discharge from the project, the two samples measure the quality of standing water in the stream rather than any impacts on water quality. The only project flow into the stream would occur for events greater than the 1.5" design storm, and that flow would occur more than 30 minutes after the start of discernible flow and would therefore not be sampled. As a result of the foregoing HE } ' VILLAGE M I VFA1RE sequence of events, in-stream monitoring provides no relevant data regarding functioning of the project stormwater management system or impacts on the creek. BMP Monitoring:The sampling points for the BMP's are located at the inflow pipe and discharge structure of each wet detention pond. Several factors about these specific ponds should be considered. Due to the sandy soils, each of three ponds typically draws down below the normal pool elevation between rain events. The ponds do not begin to discharge (to the infiltration basin) until the water level rises above the normal pool elevation, which may require a substantial rainfall event. The ponds may begin at different levels, so two ponds may discharge during an event and the third may not. The discharge samples provide data for water going to an infiltration basin, not water that will leave the site and potentially impact downstream waters.The BMP monitoring provides no relevant data regarding impacts on surface waters. Representative Rainfall Events:The representative rainfall event must be a greater than 0.1 inch rainfall preceded by three days with no rain. That is a simple and straightforward requirement on paper. In practice, it is difficult to anticipate and prepare for a rainfall event that will follow three days of no rain, will rain enough to fill up each pond to at least normal pool level and create a discharge, will rain enough to create flow in the creek, and begin and end in time so that the samples can be delivered to the lab within six hours and by 5:00 on the same day. Our project wet detention ponds are maintained on a regular basis and monitored for compliance with the stormwater permit. The system functions as designed and permitted with no discharge to surface waters during a design storm event. The monitoring program, while well intentioned, does not provide relevant data does not add environmental protection and does not measure any impacts. We request you eliminate these requirements from the permit. We appreciate your consideration of this issue. If you have any questions or concerns, please contact Mr. Larry Sneeden at 910-520-1835. Sincerely, Todd Edmiston,CMCA®,AMS® On behalf of The Executive Board of The Village at Mayfaire Condominium Owners Association DWQ Stormwater Permit SW8 011119 Plan of Action Subject: DWQ Stormwater Permit SW8 011119 Plan of Action From: Larry Sneeden<larry_sneeden@yahoo.com> Date: Tue, 22 Jul 2008 07:48:46 -0700 (PDT) To: Linda.Lewis@ncmail.net CC: BerMaguire@aol.com, JessicaRiffle@seacoastrealty.com, TEdmiston@camsmgt.com, Ray Skipper<rayskipper@bellsouth.net>, Ann Stonestreet<coastalcaro70636@bellsouth.net> Linda, On behalf of the Village of Mayfaire(VOM),we are submitting this plan of action for monitoring compliance stipulated in the project permit and your letter of May 13th. VOM has retained our services to provide the required monitoring and sampling and we are moving forward as quickly as possible. We ordered the necessary sampling meter and expect delivery within 3 weeks. Upon receipt, we will proceed immediately with both the dry weather sampling and rainfall event sampling as weather permits. I expect to complete the quarterly sampling by the end of August, receive lab results by mid-September, and submit a report to you by the end of September for the 3rd quarter. We will make every effort to expedite this process, but the above represents a reasonable schedule for completion. Prior to taking the first samples, I would like to meet at the site with you and/or Stephanie Garrett to verify the approved sample locations, discuss a split sampling event, and review any other issues with the permit and sampling. Shall I contact you or Stephanie to set that up? Please let me know if you require any additional information at this time. Larry Sneeden Coastal Carolina Resource Group, Inc. 910-520-1835 Original Message---- From: "larrysneeden@bellsouth.net" <larrysneeden@bellsouth.net> To: Larry Sneeden <larry_sneeden@yahoo.com> Sent: Tuesday, July 22, 2008 9:53:02 AM Subject: Fw: CCRG Proposal Original Message From: BerMaguire@aol.com To: Larrysneedenabellsouth.net Cc: JessicaRiffle@seacoastrealty.com Cc: JKelley@wave-net.net Cc: rverricchia@intracoastalrealty.com Cc: abbyclark3@verizon.net Cc: TEdmiston@camsmgt.com Subject: CCRG Proposal Sent: Jul 21, 2008 2:47 PM Larry: The Village at Mayfaire Executive Board has approved your proposed testing and inspection program. It is my understanding that this email will allow you to expeditiously submit the TVAM plan of action required by the State. We also understand that you will prepare a consolidated proposal for our consideration to include additional required services such as maintaining the integrity of the ponds and cleaning up the shore lines of each pond to 1°f\ 7/22/2008 11:59 AM DWQ Stormwater Permit SW8 011119 Plan of Action within State specifications. We appreciate your expertise, Bernie Maguire for the Board 2 of 2 7/22/2008 11:59 AM SW8 011119 Subject: SW8 011119 From: "Todd Edmiston" <tdmiston@camsmgt.com> Date: Thu, 19 Jun 2008 08:36:40 -0400 To: <linda.lewis@ncmail.net> CC: <larrysneeden@bellsouth.net> Linda: In response to a letter dated May 13th sent by Edward Beck to Jessica Riffle President of The Village at Mayfaire, I wanted to inform you that CAMS (managing agent for The Village at Mayfaire)is working with Larry Sneeden on providing you a"Plan of Action"as it relates to the NOV for Stormwater Permit No. SW8 011119. I am aware we are passed the June 13th submittal date; however,we are close to having the plan finalized and should have it to you within the next two weeks. I trust that this timeframe will cause no additional action to be taken by DWQ. Thank you for your time and consideration regarding this matter. Todd Edmiston, CMCA,AMS CAMS Regional Manager-Wilmington Office 1 of 1 6/19/2008 8:38 I' Permit Research Subject: Permit Research From: Cindee Wolf<CWolf@withersravenel.com> Date: Wed, 11 Jun 2008 14:07:05 -0400 To: " (Jo.Casmer@ncmail.net)" <Jo.Casmer@ncmail.net> Ms. Casmer, I am a resident of The Village at Mayfaire, the condo community at the North end of the Mayfaire development. I need to review the stormwater permit for this project. Please advise on what I need to do. I can also be reached by telephone at 620-2374. Thanks 1INt3I WOLF - WITHERS +f : RAVENEL b I I (\ 1 , toColurnouweaithDrive,Unitaos IWifiningtan,N.,`.2840; Y tel.Ott).3;6.ry777 Mt.910.256 2i84 www.withersraveneLcont NriTICF(IF c nNA I FNTI al ITY ANrt NONn IF,r i ncIT R F This electronic message,wnich intludes any attathnlents and otherdo:orrients referred to herein,contains information front Wither,& Ravenel.inc.that may be legally privileged and confidential The information is intended for the use of the addressee(s)only. lfynu am not the addressee,note that any df icIc.ure.sopyring.printing,distribution,or use of the contents of thi:,message is prohibited. If you received this fnr a i e in error,please advise the sender by reply and delete this eicctrorrit rnr_,ut;e and any attachments COPYRIGiIT NOTICE: Copyright 2008 by Withers&Raven.,Inc. All Rights Reserved byW'ither,&Ra enei,Inc.Thls notice applies to this.eketronic ni a oge.oil attachments lherel and all documents referred to therein. This cic+atronic message,any attachments thereto,andailducuiientsreferredtothereinaretineproprietaryprooertyofWithers&Ro eriel.Iric.Thiselectroniicfr3N,Suee,a►iy Lilac hrrieri1,thereto and all documents referred to therein are provided f rr the re c t ien t'a information only,and no rights are trans. ,crud by the trarsrnissiun of th it;elcaronic message by Withers&Ruverici,Inc. or receipt of this message by the recipient or any other l party. � (i L DC frf 116 � 16 001't CP" 60 11 1 of 1 6/13/2008 9:25 AM SENDER: COMPLETE THIS SECTION COMPLETE THIS SECTION ON DELIVERY ■ Complete items 1,2,and 3.Also complete A. Sign-ure item 4 if Restricted Delivery is desired. X / / ❑Agent III Print your name and address on the reverse i`'L�l�, El Addressee so that we can return the card to you. Rec t ".by(Printed Name) C. teof Delivery • Attach this card to the back of the mailpiec , or on the front if space permits ./, o' 0 D. Is delivery address different from item 1? ❑Yes 1. Article Addressed to: If YES,enter delivery address below: El No j. ess/'.'<a. /'-A''L /e Pi%IA�G N 4-re-- -/ 3. Service Type /6 30 4// Ao t7" Cftgertifled Mall ❑Express Mall ❑Registered ®Return Receipt for Merchandise �� ❑Insured Mail 0 C.O.D. Gcal/45 Ko) /l,J G �e�� 4. Restricted Delivery?(Extra Fee) ®Yes 2. Article Number (Transfer from service label) 7007 0220 0000 8222 6972 PS Form 3811,February 2004 Domestic Return Receipt 102595.02-M•1540 U.S. Postal Service',,, CERTIFIED MAILver RECEIPT rU r- (Domestic Mail Only;No Insurance Coverage Provided) ir ...17 For delivery information visit our website at www.usps.comn, ru ce_ ' _ rU Postage $ 2, 1 0 Certified Fee . 90 1 ID Post 0 Retum Receipt Fee (Endorsement Required) ,, ,GQ0 H f O CI' A''',514, Restricted Delivery Fee O (Endorsement Required) IV Nil aTotal Postage&Fees $ �./ Sent To cJ 55K'2 if/lick d o CAMS a o street Opt.Al°.`I G 36 Hi/i1 C kg Ste 103 r.- or PO Box No. I,.. Q City,State.ZIPt4/, ,iim 4,Al i C_ 20 403 PS Form 380G.Auguot CO2 , -ee Reverse for Instructions WA �� RQ Michael F.Easley,Governor 0- 0 William G.Ross Jr.,Secretary > r North Carolina Department of Environment and Natural Resources Coleen H.Sullins Director Division of Water Quality May 13, 2008 CERTIFIED MAIL #7007 0220 0000 8222 6972 RETURN RECEIPT REQUESTED Jessica L. Riffle, or current President The Village at Mayfaire c/o CAMS 1630 Military Cutoff Road, Suite 108 Wilmington, NC 28403 . Subject: NOTICE OF VIOLATION The Village at Mayfaire Stormwater Permit No. SW8 011119 New Hanover County Dear Ms. Riffle: On March 7, 2008, Wilmington Regional Office personnel performed a split sampling event with MACTEC Engineering personnel, as required by each of the 3 main permits issued for Mayfaire. The original permit for The Village at Mayfaire, SW8 011119, was transferred to the Association on December 7, 2007. The project is located on Town Centre Drive in Wilmington. New Hanover County, North Carolina. The project has been found in violation of Stormwater Permit Number SW8 011119 , issued pursuant to the requirements of 15A NCAC 2H.1000. The violations found are: 1. Section 111.1 thru 111.10- The permit requires quarterly monitoring and sampling of specific rain events throughout the year. Since the permit has been transferred, the Division has not received a quarterly monitoring report. As the permittee of record, the Association is responsible for collecting the water samples, analyzing them, and reporting the results to the Division. To correct this violation you must: 1. Provide a written "Plan of Action" which outlines the actions you will take to correct the violation and a time frame for completion of those actions, on or before June 13, 2008. 2. Make arrangements to have the quarterly sampling done, generate a report of the results, and submit that report to the Division. Failure to provide the "Plan of Action" by June 13, 2008, or to correct the violations by the date designated in the "Plan of Action", are considered violations of 15A NCAC 2H.1000, and may result in the initiation of enforcement action which may include recommendations for the assessment of civil penalties, pursuant to NCGS 143-215.6A. By copy of this letter to the New Hanover County Building Inspector, this Office is requesting that the Building Inspector consider withholding building permits and Certificates of Occupancy for this project until this matter is satisfactorily resolved. ott�_ hnCaro' a ,Naturally North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington,NC 28405 Phone(910)796-7215 Customer Service Wilmington Regional Office Internet: www.ncwaterqualitv.org Fax (910)350?2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper May 13, 2008 The Village at Mayfaire Stormwater Permit No. SW8 011119 If you have any questions concerning this matter, please call Linda Lewis at (910) 796- 7215. Sincerely, geAA- Edward Beck Regional Supervisor Surface Water Protection Section ENB\arl: S:\WQS\STORMWATER\NOTICE\011119.may08 cc: City of Wilmington Development Services Tony Roberts, New Hanover County Building Inspections Linda Lewis Wilmington Regional Office Central Office Page 2 of 2