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HomeMy WebLinkAboutWQ0015052_Permit (Issuance)_20090320Mod; �'; moo( ?/to/ ? o q NCDENR North Carolina Department of Environment and Natural Resources LI yk'nn of water Qua ity _ — — Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary William G. Freed, President Enviro-Tech of North Carolina, Inc. Post Office Box 69 Harbinger, North Carolina 27941 Dear Mr. Freed: T/a LI/ wil March 20, 2009 Pie ; VAT/LOIS Subject: Permit No. WQ0015052 Village at Ocean Hill Conjunctive Wastewater Treatment and Reclaimed Water Utilization System Currituck County In accordance with your permit renewal request received December 18, 2008, we are forwarding herewith Permit No. WQ0415052, dated March 20, 2009, to Enviro-Tech of North Carolina, Inc. for the continued operation of the subject wastewater treatment and reclaimed water utilization facilities. This permit shall be effective from the date of issuance until February 28, 2014, shall void Permit No. WQ0015052 issued April 16, 2004, and shall be subject to the conditions and limitations as specified therein. Please pay particular attention to the monitoring requirements in this permit. Failure to establish an adequate system for collecting and maintaining the required operational information will result in future compliance problems. Please note that on September 1, 2006 State Administrative Code 15A NCAC Subchapter 02T — Waste not Discharged to Surface Water was adopted. This permit incorporates the requirement of these rules. Remember to take the time to review this permit thoroughly, as some of the conditions contained therein may have been added, changed, or deleted from those in previously issued permits. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such demands are made this permit shall be final and binding. AQUIFER PROTECTION SECTION 1636 Mail Service Center, Raleigh, North Carolina 27699-1636 Location 2728 Capital Boulevard, Raleigh, North Carolina 27604 Phone: 919-733-32211 FAX 1: 919-715-0588; FAX 2: 919-715-60481 Customer Service:1-877.623-6748 Internet: www,ncwatemuality.ora An EQaal Qrportunity } Attirmav a Action Employer NorthCarohna Naturally William G. Freed March 20, 2009 Page 2 of 2 If you need additional information concerning this matter, please contact David Goodrich at (919) 715-6162 or david.goodrich@,ncmail.net. Sincerely. for Coleen H. Sullins cc: Currituck County Health Department Washington Regional Office, Aquifer Protection Section Technical Assistance and Certification Unit APS Central Files LAU Files NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES RALEIGH CONJUNCTIVE WASTEWATER TREATMENT AND RECLAIMED WATER UTILIZATION 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 Enviro-Tech of North Carolina, Inc. Currituck County FOR THE continued operations of a 164,000 gallon per day (GPD) wastewater treatment and reclaimed water utilization facility consisting of: A 100,000 gallon per day (GPD) wastewater treatment plant consisting of a flow splitter box, a manually cleaned bar screen, a 30,000 GPD flow equalization tank, a 151 cfm blower, two 69 GPM pumps, two 62,500 gallon coarse bubble aeration basins, two 10,500 gallon clarifiers, one 12,000 gallon aerated sludge holding tank, two 21 square foot tertiary filters, three 270 cfm blowers, a tablet chlorinator with a 3,190 gallon contact tank, and a 7,440 gallon dosing tank, and operation of a 64,000 GPD wastewater treatment and reclaimed water utilization system consisting of one 10,000 gallon flow equalization tank with a 142 cfm blower and two 42 GPM pumps, a flow splitter box, two 40,000 gallon coarse bubble aeration basins, two 10,700 gallon clarifiers, two 6,000 gallon aerated sludge holding tanks, three 142 cfm blowers, two 28 square foot tertiary filters, one tablet chlorinator with a 2,500 gallon contact tank, one 4,000 gallon dosing tank. Both dosing tanks will feed to the pump station, and the confluent stream resulting from both systems will be served by a 20,000 square foot conjunctive spray bed, 516,000 square feet of non -conjunctive "green area", a 3.2 million gallon irrigation pond, and 12.1 acres of non -conjunctive spray field (common area). to serve the Village at Ocean Hill, with no discharge of wastes to the surface waters, pursuant to the application received December 18, 2008, and subsequent additional information received by the Division of Water Quality (Division), 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 February 28, 2014, shall void Permit No. WQ0015052 issued April 16, 2004, and shall be subject to the following specified conditions and limitations: WQ0015052 Version 3.0 Shell Version 090204 Page 1 of 7 I. I1. SCHEDL'LES (please review the entire pernut for reporting, monitoring, and other on -going activities] 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 that Rule 15A NCAC 02T .0105(d) requires an updated site map to be submitted with the permit renewal application. PERFORMANCE STANDARDS The reclaimed water utilization facilities shall be effectively maintained and operated at all times so that there is no discharge to the surface waters, nor any contamination of ground waters, which will render them unsatisfactory for normal use. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions due to improper operation and maintenance, or failure of the utilization area to adequately assimilate the wastewater, the Permittee shall take immediate corrective actions including those actions that may be required by the Division of Water Quality (Division), such as the construction of additional or replacement wastewater treatment and disposal facilities. 2. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to ground or surface waters 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. The COMPLIANCE and REVIEW BOUNDARIES for both the reclaimed utilization system waste disposal area and the high -rate disposal area are established at the property boundary. Any exceedance of standards at the Compliance or Review Boundary shall require action in accordance with 15A NCAC 02L .0106. 6. The Permittee shall apply for a permit modification prior to any sale or transfer of property that affects a compliance boundary to establish a new compliance boundary. 7. In accordance with 15A NCAC 02L .0107(d), no wells, other than monitoring wells, shall be constructed within the compliance boundary except as provided by 15A NCAC 02L .0107(g). 8. The facilities permitted herein must be constructed according to the following setbacks: a. The setbacks for reclaimed utilization sites shall be as follows (all distances in feet): i. Surface waters not classified SA: ii. Surface waters classified SA: iii. Any well with exception to monitoring wells iv. Impounded public water supplies: v. Public shallow groundwater supply: b. The setbacks for the rapid infiltration area shall be as follows: i. Surface waters not classified SA: ii. Surface waters classified SA: iii. Any well with exception to monitoring wells iv. Impounded public water supplies: WQ0015052 Version 3.0 Shell Version 090204 25 100 100 500 500 200 200 100 100 Page 2 of 7 V. Public shallow groundwater supply: 500 d. The setbacks for treatment and storage units shall be as follows (all distances in feet): i. Any habitable residence or place of public assembly under separate ownership: 100 ii. Any private or public water supply source: 100 iii. Surface waters: 50 iv. Any well with exception of monitoring wells: 100 v. Any property line: 50 9. The following shall be requirements for the reclaimed water distribution, storage, and utilization facilities: a. All reclaimed water valves, storage facilities, and outlets shall be tagged or labeled to warn the public or employees that the water is not intended for drinking. Where appropriate, such warning shall inform the public or employees to avoid contact with the water. b. All reclaimed water piping, valves, outlets, and other appurtenances shall be color -coded, taped, or otherwise marked to identify the source of the water as being reclaimed water. i. All reclaimed water piping and appurtenances shall be either colored purple (i.e., Pantone 522) and embossed or integrally stamped or marked "CAUTION: RECLAIMED WATER - DO NOT DRINK" or be installed with a purple (i.e., Pantone 522) identification tape or polyethylene vinyl wrap. The warning shall be stamped on opposite sides of the pipe and repeated every three feet or less. ii. Identification tape shall be at least three inches wide and have white or black lettering on purple (i.e., Pantone 522) field stating "CAUTION: RECLALMED WATER — DO NOT DRINK." Identification tape shall be installed on top of reclaimed water pipelines, fastened at least every 10 feet to each pipe length and run continuously the entire length of the pipe. c. All reclaimed water valves and outlets shall be of a type, or secured in a manner, that permits operation by authorized personnel only. d. Above -ground hose bibs (i.e., spigots or other hand -operated connections) shall not be present. Hose bibs shall be located in locked below -grade vaults that shall be clearly labeled as being of non -potable quality. As an alternative to the use of locked below -grade vaults with standard hose bibs services, hose bibs, which can only be operated by a special tool or connected to a special hose connection, may be placed in non -lockable underground services boxes clearly labeled as non -potable water. 1II. OPERATION AND MAINTENANCE REQUIREMENTS 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 .0913 including operational functions, maintenance schedules, safety measures, and a spill response plan. Upon classification of the wastewater treatment and reclaimed utilization facilities by the Water Pollution Control System Operators Certification Commission (WPCSOCC), the Permittee shall designate and employ a certified operator to be in responsible charge (ORC) and one or more certified operator(s) to be back-up ORC(s) of the facilities in accordance with 15A NTCAC 08G .0200. The ORC shall visit the facilities in accordance with 15A NCAC 08G .0200 or as specified in this permit and shall comply with all other conditions specified in these rules. WQ0015052 Version 3.0 ShelI Version 090204 Page 3 of 7 3. A suitable year round vegetative cover shall be maintained such that crop health is optimized, allows for even distribution of effluent, and allows inspection of the reclaimed water utilization system. 4. Adequate measures shall be taken to prevent ponding or runoff from the reclaimed water utilization areas. 5. Reclaimed water application shall not be performed during inclement weather or when the ground is in a condition that will cause ponding or runoff. 6. All reclaimed water application equipment must be tested and calibrated at least once per permit cycle. Records of the calibration must be maintained for five years. 7. No type of wastewater other than that from the residential subdivision shall be applied to the reclaimed water utilization area. 8. An automatically activated standby power source shall be on site and operational at all times capable of powering all essential treatment units. If a generator is employed as an alternate power supply, it shall be tested weekly by interrupting the primary power source. 9. Public access to the reclaimed water utilization sites shall be controlled during active site use. Such controls may include the posting of signs showing the activities being conducted at each site. A sign shall be posted in plain sight showing these activities. 10. The residuals generated from these treatment facilities must be disposed ! utilized in accordance with 15A NCAC 02T .1100. The Permittee shall maintain a residual management plan pursuant to 15A NCAC 02T .0914. 11. Diversion or bypassing of the untreated wastewater from the treatment facilities is prohibited. 12. All wastewater shall be routed to the high -rate infiltration area should the limit for fecal coliform (daily maximum concentration of 25 per 100 ml) or turbidity (instantaneous maximum of 10 NTU) be exceeded, until such time that the problems associated with the treatment capability of the wastewater treatment plant have been corrected. IV. MONITORING AND REPORTING REQUIREMENTS 1. Any monitoring (including groundwater, surface water, soil or plant tissue analyses) deemed necessary by the Division to ensure surface and ground water protection will be established and an acceptable sampling reporting schedule shall be followed. 2. All laboratory analyses for effluent, ground waters, or surface waters shall be made by a laboratory certified by the Division for the required parameters under 15A NCAC 02H .0800. WQ0015052 Version 3.0 Shell Version 090204 Page 4 of 7 3. Flow through the treatment facility shall be continuously monitored and daily flow values shall be reported on Form NDMR. The Permittee shall install and maintain an appropriate flow measurement device consistent with approved engineering and scientific practices to ensure the accuracy and reliability of flow measurement. Flow measurement devices selected shall be capable of measuring flows with a maximum deviation of less than 10 percent from true flow, accurately calibrated at a minimum of once per year, and maintained to ensure that the accuracy of the measurements is consistent with the accepted capability of that type of device. The Permittee shall keep records of flow measurement device calibration on file for a period of at least three years. At a minimum, data to be included in this documentation shall be: a. Date of flow measurement device calibration, b. Name of person performing calibration, and c. Percent from true flow. 4. The effluent from the subject facilities shall be monitored by the Permittee at the frequencies and location for the parameters specified in Attachment A. 5. The Permittee tracking the amount of reclaimed water applied shall maintain adequate records. These records shall include, but are not necessarily limited to, the following information: a. Date of reclaimed water application, b. Volume of reclaimed water applied, c. Field irrigated, d. Length of time field is irrigated, e. Continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings for each field, f. Continuous monthly and year-to-date loadings for any non -hydraulic parameter specifically limited in Attachment B for each field, g. Weather conditions, and h. Maintenance of cover crops. 6. Monitor wells shall be sampled at the frequencies and for the parameters specified in Attachment C. All mapping, well construction forms, well abandonment forms, and monitoring_ data shall refer to the permit number and the well nomenclature as provided in Attachment C and Figure 2. Two copies of the results of the sampling and analysis must be received on Form GW-59 (Groundwater Quality Monitoring: Compliance Report Form), along with attached copies of laboratory analyses, by the Division of Water Quality, Information Processing Unit, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 on or before the last working day of the month following the sampling month. Form GW-59 shall include the number of this permit and the appropriate well identification number. One Form GW-59a certification form shall be provided for each set of sampling results submitted. Three copies of all monitoring data [as specified in Conditions IV.3. and IVA.] on Form NDMR for each point prior to irrigation (PPI) and three copies of all operation and disposal records [as specified in Conditions IV.S. and IV.6.1 on Form NDAR-1 for every utilization area 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 WQ0015052 Version 3.0 Shell Version 090204 Page 5 of 7 9. A record shall be maintained of all residuals removed from this facility. This record shall include the name of the hauler, permit authorizing the disposal or a letter from a municipality agreeing to accept the residuals, date the residuals were hauled, and volume of residuals removed. 10. A maintenance log shall be maintained at this facility including but not limited to the following items: a. Daily sampling results of dissolved oxygen in the aeration basin and at the clarifier weir. b. Visual observations of the plant and plant site. c, Record of preventative maintenance (changing of filters, adjusting belt tensions, alarm testing, diffuser inspections and cleanings, etc.). d. Date of calibration of flow measurement device. e. Date and results of power interruption testing on alternate power supply. 11. Noncompliance Notification: The Permittee shall report by telephone to the Washington Regional Office, telephone number (252) 946-6481, 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 wastewater treatment facility which results in the treatment of significant amounts of wastes which are abnormal in quantity or characteristic, such as the dumping of the contents of a sludge digester; the known passage of a slug of hazardous substance through the facility; or any other unusual circumstances including ponding in the reclaimed utilization area or runoff from the reclaimed utilization areas. b. Any process unit failure, due to known or unknown reasons, that render the facility incapable of adequate wastewater treatment such as mechanical or electrical failures of pumps, aerators, compressors, etc. c. Any failure of disposal system resulting in a by-pass directly to receiving waters. d. Any time that self -monitoring information indicates that the facility has gone out of compliance with its permit limitations including, but not limited to, freeboard measurements, effluent limitations, exceedances of groundwater standards, or overloading of any utilization area. For any emergency that requires immediate reporting (e.g., discharges to surface waters, imminent failure of a storage structure, etc.) outside normal business hours must 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 (5) days following first knowledge of the occurrence. This report must outline the actions taken or proposed to be taken to ensure that the problem does not recur. V. INSPECTIONS 1. Adequate inspection and maintenance shall be provided by the Permittee to ensure proper operation of the subject facilities. The Permittee or his designee shall inspect the wastewater treatment and disposal facilities to prevent malfunctions and deterioration, operator errors and discharges which may cause or lead to the release of wastes to the environment, a threat to human health, or a nuisance. The Permittee shall keep an inspection log or summary including at least the date and time of inspection, observations made, and any maintenance, repairs, or corrective actions taken by the Permittee. This log of inspections shall be maintained by the Permittee for a period of five years from the date of the inspection and shall be made available upon request to the Division or other permitting authority. WQ0015052 Version 3.0 Shell Version 090204 Page 6 of 7 3. Any duly authorized officer, employee, or representative of the Division may, upon presentation of credentials, enter and inspect any property, premises or place on or related to the disposal site or facility at any reasonable time for the purpose of determining compliance with this permit; may inspect or copy any records that must be maintained under the terms and conditions of this permit, and may obtain samples of groundwater, surface water, or leachate. VI. GENERAL CONDITIONS 1. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to an enforcement action by the Division in accordance with North Carolina General Statute 143- 215.6A to 143-215.6C. 2. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 3. This permit is effective only with respect to the nature and volume of wastes described in the application and other supporting data. No variances to applicable rules governing the construction and / or operation of the permitted facilities are granted unless specifically requested and granted in this permit. 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 government agencies (local, state, and federal) that have jurisdiction. 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 NCG010000, and any requirements pertaining to wetlands under 15A NCAC 02B .0200 and 02H .0500. 5. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division on official Division forms, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The Permittee of record shall remain fully responsible for compliance until a permit is issued to the new owner. 6. The Permittee shall retain a set of 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. The Permittee must pay the annual fee within 30 days after being billed by the Division. Failure to pay the fee accordingly may cause the Division to initiate action to revoke this permit pursuant to 15A NCAC 02T .0105(e). Permit issued this the 20th of March 2009 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION i f Col H. Sullins, Director ivision of Water Quality By Authority of the Environmental Management Commission Permit Number WQ0015052 WQ0015052 Version 3.0 Shell Version 090204 Page 7 of 7 ATTACHMENT A - LIMITATIONS AND MONITORING REQUIREMENTS Permit Number: WQ0015052 Enviro-Tech of North Carolina, Inc. — Village at Ocean Hill PPI 001— WWTF Influent EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS Parameter Description - PCS Code Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Flow, in conduit or thru treatment plant — 50050 164,000 gpd Continuous Recorder PPI 002 — WWTF Effluent EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS Parameter Description - PCS Code Monthly Average Weekly Average Daily Maximum Measurement Frequency cy Sample ype BOD, 5-Day (20 Deg. C)-00310 10 mg/l 15 mg/l 2 X month Composite Solids, Total Suspended — 00530 5 mg/1 10 mg/l 2 X month Composite Nitrogen, Ammonia Total (as N) — 00610 4 mg/1 6 mg/1 2 X month Composite Coliform, Fecal MF, M-FC Broth, 44.5C— 31616 14 per 100 ml 25 per 100 Ml 2 X Month Grab Turbidity, HCH Twbidimeter— 00076 10 NTU Continuous Recording pH — 00400 6.0 — 9.0 Sul Daily (5 X week) Grab Chlorine, Total Residual — 50060 Daily (5 X week) Grab Nitrogen, Nitrate Total (as N) — 00620 2 X month Composite Solids, Total Dissolved- 180 Deg.0 — 70300 3 X year Composite Chloride (as Cl) — 00940 3 X year Grab Carbon, Total Organic (TOC) — 00680 3 X year Grab I . Acceptable Range for pff is 6.0 to 9.0 standard units. WQ0015052 Version 3.0 Attachment A Page 1 of I ATTACHMENT B - APPROVED LAND APPLICATION SITES AND LIMITATIONS Permit Number: WQ0015052 Version: 3.0 Enviro-Tech of North Carolina, Inc. — Village at Ocean Hill UTILIZATION AREA INFORMATION APPLICATION LIMITATIONS Field/ Basin Owner County Latitude Longitude Net Acreage Dominant Soil Series Parameter Rate Yearly Max Units Tract 1, Zone A Rapid Infilt. Area Corolla North Utility Village Currituck 36°23'07" 75°50'06" 0.46 Os — Osier Fine Sand Flow 4* gal / sq. ft / day Tract 2, Zone A Reuse Spray Area Enviro-Tech Currituck 36°23' 10" 75050'06" 12.1 Os — Osier Fine Sand Flow 3 inches / week Total 12.56 * A maximum rate of 8.2 gallons per square foot per day is allowed for any 20 consecutive days. Note: The Tract 1, Zone A Rapid Infiltration Area is Conjunctive. The Tract 2, Zone A Reuse Spray Area is Non -Conjunctive. WQ0015052 Version 3.0 Attachment A Page I of I ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS Monitoring wells: MW-9 & MW-10 Permit Number: WQ0015052 Vet GROUNDWATER CHARACTERISTICS GROUNDWATER STANDARDS MONITORING REQUIREMENTS Parameter Description - Parameter Code Daily Maximum Frequency Measurement Sample Type Footnotes Nitrogen, Nitrate Total (as N) — 00620 10 Mg/l 3 X year Grab 1,7 Coliform, Fecal MF, M-FC Broth,44.5C — 31616 1 per 100 ml 3 X year Grab 1,7 pH — 00400 6.5 — 8.5 (range) Su 3 X year Grab 1,7 Chloride (as CI) — 00940 250 Mg/) 3 X year Grab 1,7 Solids, Total Dissolved- 180 Deg.0 — 70300 500 Mg/l 3 X year Grab 1,7 Water level, distance from measuring point — 82546 3 X year Grab 1, 2, 3, 7 Nitrogen, Total Ammonia (as N) — 00610 Carbon, Total Organic (TOC) — 00680 3 X year 3 X year Grab Grab 1,7 f 1, 6, 7 {I Volatile Compounds, (GC/MS) — 78732 Annual Grab 1, 4, 5, 7 L 3 X year monitoring shall be conducted in March, July & November; Annual monitoring shall be conducted every November. 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. The measurement of pH shall be made after purging and prior to sampling for 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 6230D, PQL at 0.5 µg/L or less b. Standard Method 6210D, PQL at 0.5 µg/L or less c. EPA Method 8021, Low Concentration, PQL at 0.5 µg/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 VIII of Standard Method 6230D. 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 MDL but below the PQL of 0.5 µg/i_ 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 Washington Regional Office Aquifer Protection Supervisor, telephone number (252) 946-6481, must be contacted immediately for further instructions regarding any additional follow-up analyses required. 6. If TOC concentrations greater than 10 mg/I 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 TUC concentration as measured in the background monitor well exceeds 10 mg/I, this concentration will be taken to represent the naturally occurring TOC concentration. Any exceedances of this naturally occurring TOC concentration in the downgradient wells shall be subject to the additional sampling and analysis as described above. 7. Monitoring wells shall be reported consistent with the nomenclature and location information provided in Figure 2 and this attachment. WQOO15052 Version 3.0 Attachment C Page I of 1 • j . � l i c t q h Lights, a ` a dad ought l i a l I rfr� fir___,.-... .. ea, t .1 ._,—r•— ._--- F it Be n d� I x n l ° ai �•x4.5f, FIGURE 1 _ ENVIRG-TECH OF NORTH CAROLINA, INC. Wand VILLAGE AT OCEAN HILL m Northeast WASTEWATER TREATMENT SYSTEM e` Pond, CURRITUCK COUNTY o r (( WQ0015052 0 Brant Island a n � SITE LOCATION MAP � 0 W-140 c rtr Pm, re A -re e -45 0 4XI f t FIGURE 2 ENVIRO-TECH OF NORTH CAROLINA, INC. VILLAGE AT OCEAN HILL WASTEWATER TREATMENT SYSTEM CURRITUCK COUNTY HQO015052 SITE DETAIL MAP