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HomeMy WebLinkAboutWQ0005233_Final Permit_20100712N.CDENR North Carolina Department of Environment and Naturaf Resources Division of Water Quality Beverly raves Perdue Coleen H. Sullins Governor Director July 12, 2010 George W. Radford, Environmental Affairs Officer USMCAS Cherry Point Environmental Affairs Department, PSC Box 8006 Cherry Point, North Carolina 28533-0006 Dear Mr. Radford; Dee Freeman Secretary Subject: Permit No. WQ0005233 Enlisted Men's Barracks - Atlantic WWTP Wastewater Irrigation System Carteret County In accordance with an email response received from you on June 28, 2010, we are forwarding herewith a corrected Permit No. WQ0005233, issued June 4, 2010, to MCAS Cherry Point for the subject wastewater irrigation system. The following corrections have been made to the permit, as referenced by permit condition number and/or Attachment: I.2 Condition was added requiring the Permittee to submit a formal document outlining the schedule at which the liner in the facultative lagoon replaced or repaired as well as an evaluation of the integrity of the polishing/storage pond liner. The remaining Conditions under the SCHEDULES section have been renumbered to reflect the addition of the new Condition 1.2. III.8 Condition requiring automatically activated power was removed from permit. The remaining conditions were renumbered to reflect the deletion. A. The instantaneous loading rate was increased from 0.18 to 0.26 inches per hour for Fields I and 2. Please replace Permit No. WQ0005233, issued June 4, 2010 with the enclosed corrected version. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition; conforming to Chapter 150B of the ACYJI=ER PRO1 ECTIM SECTION 1636 Ma8 Service Cente-, Raleis':. n ort,. Carolina 27699-16H Locaiion 2728 Capita: Boulevard, Raleigh. kurtci Camlha 276C4 Onc Phone: 919-73A2211 FAX 1: 91:' 715-0566; FAX 2; 919-7'. 6D4c^ 1 Custmer Service: 1-877-623-674,' North Carol inxa irtemet: www.ncwateraua N,or �%/g y� ®d A Et ial Qpportu .y 1 " 3rive -_ r-i, ^nlo„ j/ �' "I tI ra4Fil Mr. Radford July 12, 2010 Page 2 of 2 North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-67I4. Unless such demands are made this permit shall be final and binding. If you need additional information concerning this matter, please contact Alice M. Wessner at (919) 715-5208 or alice.wessner@ncdenr.gov. Sincerely, Colce H. Sullins cc: Carteret County Health Department Wilmington Regional Office, Aquifer Protection Section Steven D. Harvey, PE, Dewberry & Davis, Inc., 2301 Rexwoods Drive. Raleigh, NC 27607 Technical Assistance and Certification Unit Permit File #WQ0005233 Notebook Files #WQ0005233 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES RALEIGH WASTEWATER IRRIGATION SYSTEM PERMIT 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 MCAS Cherry Point Carteret County FOR THE continued operation of a 5,000 gallon per day (GPD) wastewater treatment and wastewater irrigation facility consisting of treated wastewater generated from the E. M. Barracks' (a residential building for enlisted personnel) located at the MCALF Atlantic -Marine Corps Air Station, Cherry ,Point facility, consisting of, one-60 gallon per minute (GPM) influent pump station with dual pumps and high water alarm system; one -primary stabilization lagoon; one-468,000 gallon polishing and storage pond, one - chlorine (tablet) contact chamber; dual irrigation pumps with flow measuring and recording equipment; two -one-half acre spray irrigation fields; and all associated valves, piping, and appurtenances to serve the MCALF Atlantic -Marine Corps Air Station, Cherry Point facility Enlisted Men's Barracks, with no discharge of wastes to the surface waters, pursuant to the renewal request, received November 23, 2009 and subsequent additional information received April 7, 2010; and in conformity with the project plan, specifications, and other supporting data subsequently filed and approved by the Department of Environment and Natural Resources and considered a part of this permit. This permit shall be effective from the date of issuance until July 31, 2013, shall void Permit No. WQ0005233 issued August 11, 2006 and shall be subject to the following specified conditions and limitations: I. SCHEDULES 1. A gauge to monitor waste levels in the stabilization lagoon and polishing and storage pond shall be installed within 60 days of permit issuance/prior to operation. Caution shall be taken not to damage the integrity of the liner (if present) when installing the gauge. 2. No later than ninety (90) days following the issuance of this permit, the Permittee shall submit to the Division a formal document outlining the schedule at which the liner in the facultative lagoon will be replaced or repaired as well as an evaluation of the integrity of the polishing/storage pond liner.. WQ0005233 Version 3.1 Shell Version 100209 Page 1 of 9 No later than six months prior to the expiration of this permit, the Permittee shall request renewal of this permit on official Division forms. Upon receipt of the request, the Division will review the adequacy of the facilities described therein, and if warranted, will renew the permit for such period of time and under such conditions and limitations as it may deem appropriate. Please note Rule 15A NCAC 02T .0105(d) requires an updated site map to be submitted with the permit renewal application. 4. In accordance with 15A NCAC 02H .0404(e), if the subject wastewater treatment or disposal facilities are in noncompliance with the terms and conditions of this permit, governing statutes or regulations, the subject facilities shall be connected to an operational publicly owned wastewater collection system within 180 days of its availability. Prior to the initiation of these connection activities, appropriate Division approval shall be received. II. PERFORMANCE STANDARDS The subject non -discharge facilities shall be effectively maintained and operated at all times so there is no discharge to surface waters, nor any contravention of groundwater or surface water standards. In the event the facilities fail to perform satisfactorily, including the creation of nuisance conditions due to improper operation and maintenance, or failure of the irrigation areas to adequately assimilate the effluent, the Permittee shall take immediate corrective actions including Division required actions, such as the construction of additional or replacement wastewater treatment or disposal facilities. 2. This permit shall not relieve the Permittee of their responsibility for damages to groundwater or surface water resulting from the operation of this facility. 3. Effluent limitations shall not exceed those specified in Attachment A. 4. Application rates, whether hydraulic, nutrient or other pollutant, shall not exceed those specified in Attachment B. 5. A usable green area shall be maintained for effluent disposal. The green area shall have the capability of accommodating the facility's average daily flow without exceeding the green area loading rates. As defined in 15A NCAC 02H .0404(g)(7), a "green area" is an area suitable for waste disposal, either in its natural state or which has been modified by planting a vegetative cover of grasses or low growing shrubbery. 6. The compliance boundary for the disposal system shall be specified in accordance with 15A NCAC 02L .0107(b). This disposal system was individually permitted on or after December 30, 1983; therefore, the compliance boundary is established at either 250 feet from the effluent disposal area, or 50 feet within the property boundary, whichever is closest to the effluent disposal area. An exceedance of groundwater standards at or beyond the compliance boundary is subject to remediation action according to 15A NCAC 02L .0106(d)(2) as well as enforcement actions in accordance with North Carolina General Statute 143-215.6A through 143-215.6C. 7. In accordance with 15A NCAC 02L .0108, the review boundary is established midway between the compliance boundary and the effluent disposal area. Any exceedance of groundwater standards at the review boundary shall require action in accordance with 15A NCAC 02L .0106. 8. The Permittee shall apply for a permit modification to establish a new compliance boundary prior to any sale or transfer of property affecting a compliance boundary. In accordance with 15A NCAC 02L .0107(d), no wells, excluding Division approved monitoring wells, shall be constructed within the compliance boundary except as provided for in 15A NCAC 02L .0107(g). WQ0005233 Version 3.1 Shell Version 100209 Page 2 of 8 10. Except as provided for in 15A NCAC 02L .0107(g), the Permittee shall ensure any landowner who is not the Permittee and owns land within the compliance boundary shall execute and file with the Carteret County Register of Deeds an easement running with the land containing the following items: a. A notice of the permit and number or other description as allowed in 15A NCAC 02L .0107(f)(1); b. Prohibits construction and operation of water supply wells within the compliance boundary; and c. Reserves the right of the Permittee or the State to enter the property within the compliance boundary for purposes related to the permit. The Director may terminate the easement when its purpose has been fulfilled or is no longer needed. 11. The facilities permitted herein shall be constructed according to the following setbacks: a. The setbacks for irrigation sites permitted prior to September 1, 2006 shall be as follows (all distances in feet): i. Anv habitable residence or place of public assembly under separate ownership: 400 ii. Surface waters: 100 iii. Any well with exception of monitoring wells: 100 iv. Any property line: 150 v. Public right of way: 50 b. The setbacks for storage and treatment units permitted prior to September 1, 2006 shall be as follows (all distances in feet): i. Any well with exception of monitoring wells: 100 ii. Any property line: 50 111. OPERATION .AND MAINTENANCE RE UIREMENTS 1. The facilities shall be properly maintained and operated at all times. The facilities shall be effectively maintained and operated as a non -discharge system to prevent the discharge of any wastewater resulting from the operation of this facility. The Permittee shall maintain an Operation and Maintenance Plan pursuant to 15A NCAC 02T .0507 which at a minimum shall include operational functions, maintenance schedules, safety measures and a spill response plan. 2. Upon the Water Pollution Control System Operators Certification Commission's (WPCSOCC) classification of the subject non -discharge facilities, in accordance with 15A NCAC 08G .0200 the Permittee shall designate and employ a certified operator in responsible charge (ORC) and one or more certifled operator(s) as back-up ORC(s). The ORC or their back-up shall visit the facilities in accordance with 15A NCAC 08G .0200, and shall comply with all other conditions specified in the previously cited rules. 3. A suitable year round vegetative cover shall be maintained at all times, such that crop health is optimized, allows for even distribution of effluent and allows inspection of the irrigation system. 4_ Adequate measures shall be taken to prevent effluent ponding in or runoff from the irrigation sites listed in Attachment B. 5. Irrigation shall not be performed during inclement weather or when the ground is in a condition that will cause ponding or runoff. 6. All irrigation equipment shall be tested and calibrated at least once per permit cycle, Calibration records shall be maintained at the facility for a period of no less than five years, and shall be made available to the Division upon request. WQ0005233 Version 3.1 Shell Version 100209 Page 3 of 8 7. Only effluent from E. M. Barracks' (a residential building for enlisted personnel) located at the MCALF Atlantic -Marine Corps Air Station, Cherry Point facility shall be irrigated on the sites listed in Attachment B. 8. No automobiles or machinery shall be allowed on the irrigation sites except during equipment installation or while maintenance is being performed. 9. Public access to the irrigation sites and wastewater treatment facilities shall be prohibited. 10. The residuals generated from the wastewater treatment facilities shall be disposed or utilized in accordance with 15A NCAC 02T .1100. The Permittee shall maintain a residual management plan pursuant to 15A NCAC 02T .0508. 11. Diversion or bypassing of untreated or partially treated wastewater from the treatment facilities is prohibited. 12. Diversion or bypassing of untreated or partially treated wastewater from the treatment facilities is prohibited, unless diverted to an alternate treatment or collection system. 13. Freeboard in the stabilization lagoon and polishing and storage pond shall not be less than two feet at any time. 14. A gauge to monitor waste levels in the stabilization lagoon and polishing and storage pond shall be provided. This gauge shall have readily visible permanent markings indicating the following elevations: maximum liquid level at the top of the temporary liquid storage volume; minimum liquid level at the bottom of the temporary liquid storage volume; and the lowest point on top of the dam. 15. A protective vegetative cover shall be established and maintained on all earthen embankments (i.e., outside toe of embankment to maximum allowable temporary storage elevation on the inside'of the embankment), berms, pipe runs, erosion control areas, and surface water diversions. Trees, shrubs, and other woody vegetation shall not be allowed to grow on the earthen dikes or embankments. Earthen embankment areas shall be kept mowed or otherwise controlled and accessible. IV. MONITORING AND REPORTING REQUIREMENTS 1. Any Division required monitoring (including groundwater, plant tissue, soil and surface water analyses) necessary to ensure groundwater and surface water protection shall be established, and an acceptable sampling reporting schedule shall be followed. 2. Per 15A NCAC 02H .0800, a Division certified laboratory shall conduct all laboratory analyses for the required effluent, groundwater or surface water parameters. 3. Flow through the treatment facility shall be continuously monitored, and daily average flow values shall be reported on Form NDMR. Flow may be estimated from water use records, provided the Permittee's water use is metered. Daily average flow values shall be calculated by dividing the monthly metered water usage by the number of days in the month. 4. The Permittee shall monitor the effluent from the subject facilities at the frequencies and locations for the parameters specified in Attachment A. WQ0005233 Version 3.1 Shell Version 100209 Page 4 of 8 The Permittee shall maintain adequate records tracking the amount of effluent irrigated. At a minimum, these records shall include the following information for each irrigation site listed in Attachment B: a. Date of irrigation; b. Volume of effluent irrigated; c. Site irrigated; d. Length of time site is irrigated; e. Continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings; f. Weather conditions; and g. Maintenance of cover crops. Freeboard (i.e., waste level to the lowest embankment elevation) in the stabilization lagoon and polishing and storage pond shall be recorded weekly. Weekly freeboard records shall be maintained at the facility for a period of no less than five years, and shall be made available to the Division upon request. 7. Three copies of all monitoring data (as specified in Conditions IV.3. and IVA.) on Form NDMR for each PPI and three copies of all operation and disposal records (as specified in Conditions IV.5 and IV.6.) on Form NDAR-1 for every site in Attachment B shall be submitted on or before the last day of the following month. If no activities occurred during the monitoring month, monitoring reports are still required documenting the absence of the activity. All information shall be submitted to the following address: Division of Water Quality Information Processing Unit 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Pursuant to § 143-215.1C., the Permittee shall provide to its users and the Division of Water Quality an annual report summarizing the performance of the wastewater treatment and irrigation facility and the extent to which the facility has violated this permit, or federal or State laws, regulations, or rules related to the protection of water quality. This report shall be prepared on either a calendar or fiscal year basis and shall be provided no later than 60 days after the end of the calendar or fiscal year. Two copies of the annual report provided to the Permittee's users shall be submitted to: Division of Water Quality Aquifer Protection Section 1636 Mail Service Center Raleigh, North Carolina 27699-1636 A record shall be maintained of all residuals removed from this facility. This record shall be maintained at the facility for a period of no less than five years, and shall be made available to the Division upon request. At a minimum, this record shall include: a. Name of the residuals hauler; b. Non -Discharge permit number authorizing the residuals disposal, or a letter from a municipality agreeing to accept the residuals; c. Date the residuals were hauled; and d. Volume of residuals removed. 10. A maintenance log shall be maintained at this facility. This log shall be maintained at the facility for a period of no less than five years, and shall be made available to the Division upon request. At a minimum, this log shall include: a. Visual observations of the plant and plant site; and b, Record of preventative maintenance (e.g., changing of equipment, adjustments, testing, inspections and cleanings, etc.). WQ0005233 Version 3.1 Shell Version 100209 Page 5 of 8 11. An annual representative soils analysis (i.e., Standard Soil Fertility Analysis) shall be conducted on each irrigation site listed in Attachment B. These results shall be maintained at the facility for a period of no less than five years, and shall be made available to the Division upon request. At a minimum, the Standard Soil Fertility Analysis shall include the following parameters: Acidity Exchangeable Sodium Percentage Phosphorus Base Saturation (by calculation) Magnesium Potassium Calcium Manganese Sodium Cation Exchange Capacity Percent Humic Matter Zinc Copper pH 12. Noncompliance Notification: The Permittee shall report by telephone to the Wilmington Regional Office, telephone number (910) 796-7215, as soon as possible, but in no case more than 24 hours, or on the next working day following the occurrence or first knowledge of the occurrence of any of the following: a. Any occurrence at the facility resulting in the treatment of significant amounts of wastes that is abnormal in quantity or characteristic, including the known passage of a hazardous substance. b. Any process unit failure (e.g., mechanical, electrical, etc.), due to known or unknown reasons, rendering the facility incapable of adequate wastewater treatment. c. Any facility failure resulting in a by-pass directly to receiving surface waters. d. Any time self -monitoring indicates the facility has gone out of compliance with its permit limitations. e. Ponding in or runoff from the irrigation sites. Any emergency requiring immediate reporting (e.g., discharges to surface waters, imminent failure of a storage structure, etc.) outside normal business hours shall be reported to the Division's Emergency Response personnel at telephone number (800) 662-7956, (800) 858-0368, or (919) 733-3300. Persons reporting such occurrences by telephone shall also file a written report in letter form within five days following first knowledge of the occurrence. This report shall outline the actions taken or proposed to be taken to ensure the problem does not recur. V. INSPECTIONS 1. The Permittee shall provide adequate inspection and maintenance to ensure proper operation of the wastewater treatment and disposal facilities. 2. The Permittee or their designee shall inspect the wastewater treatment and disposal facilities to prevent malfunctions, facility deterioration and operator errors resulting in discharges, which may cause the release of wastes to the environment, a threat to human health or a public nuisance. The Permittee shall maintain an inspection log that includes, at a minimum, the date and time of inspection, observations made, and any maintenance, repairs, or corrective actions taken. The Permittee shall maintain this inspection log for a period of five years from the date of the inspection, and this log shall be made available to the Division upon request. 3. Any duly authorized Division representative may, upon presentation of credentials, enter and inspect any property, premises or place on or related to the wastewater treatment and disposal facilities permitted herein at any reasonable time for the purpose of determining compliance with this permit; may inspect or copy any records required to be maintained under the terms and conditions of this permit, and may collect groundwater, surface water or leachate samples. WQ0005233 Version 3.1 She]] Version 100209 Page 6 of 8 VI. GENERAL CONDITIONS 1. Failure to comply with the conditions and limitations contained herein may subject the Permittee to an enforcement action by the Division in accordance with North Carolina General Statutes 143- 215.6A to 143-215.6C. 2. This permit shall become voidable if the permitted facilities are not constructed in accordance with the conditions of this permit, the Division approved plans and specifications, and other supporting documentation. 3. This permit is effective only with respect to the nature and volume of wastes described in the permit application, Division approved plans and specifications, and other supporting documentation. No variances to applicable rules governing the construction or operation of the permitted facilities are granted, unless specifically requested and approved in this permit pursuant to 15A NCAC 02T .0105(n). 4. The issuance of this permit does not exempt the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other jurisdictional government agencies (e.g., local, state_ and federal). Of particular concern to the Division are applicable river buffer rules in 15A NCAC 02B .0200, erosion and sedimentation control requirements in 15A NCAC Chapter 4 and under the Division's General Permit NCGO10000; any requirements pertaining to wetlands under 15A NCAC 02B .0200 and 02H .0500; and documentation of compliance with Article 21 Part 6 of Chapter 143 of the General Statutes. 5. In the event the permitted facilities change ownership or the Permittee changes their name, a formal permit modification request shall be submitted to the Division. This request shall be made on official Division forms, and shall include appropriate property ownership documentation and other supporting documentation as necessary. The Pennittee of record shall remain fully responsible for maintaining and operating the facilities permitted herein until a permit is issued to the new owner. 6. The Permittee shall retain a set of Division approved plans and specifications for the life of the facilities permitted herein. 7. The Permittee shall maintain this permit until all permitted facilities herein are properly closed or permitted under another permit issued by the appropriate permitting authority pursuant to 15A NCAC 02T A1050). 8. This permit is subject to revocation or unilateral modification upon 60 days notice from the Division Director, in whole or part for the requirements listed in 15A NCAC 02T .0110. 9. Unless the Division Director grants a variance, expansion of the permitted facilities contained herein shall not be granted if the Permittee exemplifies any of the criteria in 15A NCAC 02T .0120(b). 10. The Permittee shall pay the annual fee within 30 days after being billed by the Division. Failure to pay the annual fee accordingly shall be cause for the Division to revoke this permit pursuant to 15A NCAC 02T .0105(e)(3). Permit issued this the 4"' day of June 2010. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Z4 ullins, Director Divisi& of Water Quality By Authority of the Environmental Management Commission Permit Number WQ0005233 WQ0005233 Version 3.1 Shell Version 100209 Page 7 of 8 THIS PAGE BLANK WQ0005233 Version 3.1 Shell Version 100209 Page 8 of 8 ATTACHMENT A _ LIMITATIONS AND MONITORING REQUIREMENTS PPI 001— WWTF Effluent Permit Nutnber: WQ0005233 Version: 3.1 EFFLUENT CHARACTERISTICS EFFLUENT LIMITS 11 QUM NG REQUIRIRElF7 ENTS Parameter Description - PCS Code Monthly Average Mean Daily Minimum Daily Maximum Measurement Frequency Frequency Sample Type Flow, in conduit or thni treatment plant - 50050 5,000 gpd Continuous Estimate pll - 00400 6 S.U. 9 SM. 3 x year Grab Colifonn, Fecal MF, M-FC Broth,44.5C - 31616 200 #1106,111 Monthly Grab Nitrogen, Ammonia Total (as N) - 00610 - 3 x vear Grab BOD, 5-Day (20 Deg. C) - 00310 60 mgli 3 x year Grab Solids, Total Suspended - 00530 90 mg/l 3 x year Grab Phosphorus, Total (as P) — Concentration - C0665 3 x year Grab Nitrogen, Kjeldahl. Total (as N) - 00625 3 x year Grab Nitrogen. Total (as N) — Concentration — C0600 3 x year Grab a3 x year sampling shall be conducted during March, July and November. WQ0005233 Version 3.1 Attachment A Page I of 2 THIS PACE BLANK WQ00052_ ersion 3.1 Attachment A .e 2 of 2 ATTACHMENT B - APPROVED LAND APPLICATION SITES AND LIMITATIONS Permit Number: WQ0005233 Version: 3.1 WAS Cherry Point — E. M. Barracks' at the MCALF Atlantic -Marine Corps Air Station, Cherry Point Facility IRRIGATION AREA INFORMATION APPLICATION LIMITATIONS Field Owner County Latitude Longitude Net Dominant parameter hourly Yearly Units Acreage Soil Series Rate Mai US MCAS Chem Point MCALF- Carteret enet 34052'55" 76021'02" 2.0 Leon 01284 -Application Surface Irrigation 26 67 inches Atlantic 02 US WAS Cherry Point MCALF- Carteret 3405254" 76020'59" 2.0 Leon 01284 - Application Surface Irrigation .26 67 inches Atlantic Totals 4.0 WQ0005233 Version 3.1 Attachment B Page 1 of 2 THIS PAGE BLANK WQ00052 Version 3.1 Attachment B 'age 2 of 2 ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS Monitoring wells: MW-2, MW-3, MW-4 and MW-5. Permit Number: WQ9005233 Version: 3.1 GROUNDWATER CHARACTERISTICS GROUNDWATER STANDARDS MONITORING REQUIREMENTS Parameter Description - Parameter Code Daily Maximum Frequency Measurement Sample Type Footnotes Water level, distance from measuring point - 82546 3 x year Calculated 1.2.3 Chloride (as Cl) — 00940 250 3 x year Grab I Carbon, Total Organic (TOC) — 00680 3 x year Grab 1,6 pH — 00400 6.5 8.5 3 x year Grab I Solids, Total Dissolved — 180 °C - 70300 500 3 x year Grab 1 Coliforrn, Fecal MF, M-FC, Broth, 44.5C 3 x year Grab 1 Volatile Compounds GC/MS - 78732 1 x year Grab 1,45 I _ 3 x Year monitoring shall be conducted in March, July & November; Annual monitoring shall be conducted every June. 2. The measurement of water levels shall be made prior to purging the wells. The depth to water in each well shall be measured from the surveyed point on the top of the casing. 'I'he mcasurement of pi l shall be made after purging and prior to sampling £or the remaining parameters. 3. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the relative elevation of the measuring point for each monitoring well. The measuring points (top of casing) of all monitoring wells shall be surveyed relative to a common datum. 4, Volatile Organic Compounds (VOC) - In November only, analyze by one of the following methods: a. Standard Method 62301), PQL at 0.5 jtg/L or less b. Standard Method 62101). PQL at 0.5 pg/L or less c. EPA Method 8021, Low Concentration. PQL at 0.5 lig/L or less d. EPA Method 8260, Low Concentration, PQL at 0.5 µg/L or less e. Another method with prior approval by the Aquifer Protection Section Chief Any method used must meet the following qualifications: a. A laboratory must be DWQ certified to run any method used. b. The method used must, at a minimum_ include all the constituents listed in Table Vlll of Standard Method 62301). C. The method used must provide a PQL of 0.5 µg/L or less that must be supported by laboratory proficiency studies as required by the DWQ Laboratory Certification Unit. Any constituents detected above the MD[, but below the PQI, of 0.5 µg/L must be qualified (estimated) and reported. 5. if any volatile organic compounds (VOC) are detected as a result of monitoring as provided in Attachment C, then the Wilmington Regional Office Aquifer Protection Supervisor, telephone number (910)796-7215. must be contacted immediately for further instructions regarding any additional follow-up analyses required. 6. if TOC concentrations greater than 10 mg/1 are detected in any downgradient monitoring well, additional sampling and analysis must be conducted to identify the individual constituents comprising this TOC concentration. If the TOC concentration as measured in the background monitor well exceeds 10 mg/[, this concentration will be taken to represent the naturally occurring TOC concentration. AnN, exceedances of this naturally occurring TOC concentration in the downgradient wells shall be subject to the additional sampling and analysis as described above. Monitoring wells shall he reported consistent with the nomenclature and location information provided in Figure 1 and this attachment. WQ0005233 Version 3.1 Attachment C Page I of 1