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Home My WebLink AboutWQ0006254_Attachment Certifcation_20200901ROY COOPER Governor MICHAEL S. REGAN Secretary S. DANIEL SMITH Director NORTH CAROLINA Environmental Quality September 1, 2020 J. BRYCE MENDENHALL — VICE PRESIDENT OF OPERATIONS CAROLINA WATER SERVICE, INC. OF NORTH CAROLINA 4944 PARKWAY PLAZA BOULEVARD — SUITE 375 CHARLOTTE, NORTH CAROLINA 28217 Subject: Permit No. WQ0006254 Corolla Light WWTP 91 High -Rate Infiltration System Attachments A, B, and C Certification Currituck County Dear Mr. Mendenhall: In accordance with your permit minor modification request received August 14, 2020, we are forwarding herewith a modified facility description and Attachments A, B, and C certified September 1, 2020, to Carolina Water Service, Inc. of North Carolina for the subject wastewater treatment and high -rate infiltration facilities. Modifications to the subject permit are as follows: the permitted flow in Attachment A has been reduced from 160,000 gallons per day (GPD) to 120,000 GPD with the removal of Field LPP; Field LPP has been removed from the facility description and Attachment B; monitoring wells MW-4, MW-5, and MW-6 have been removed from Attachment C. The modified facility description and Attachments A, B and C shall be effective from the date of certification until October 31, 2021 (i.e., expiration date of the current permit), shall void the facility description and Attachments B and C of Permit No. WQ0006254 issued November 1, 2016, and shall be subject to the conditions and limitations as specified therein, as well as those specified in the above - referenced permit. Please replace the facility description and Attachments A, B, and C of Permit No. WQ0006254 that was issued November 1, 2016 with the modified facility description and Attachments A, B, and C. Please note that the Permittee shall submit a renewal application no later than May 4, 2021. Please note that a new site map is attached to this letter. It is the Permittee's responsibility to ensure that a complete permit is created by inserting these documents into the previously issued permit. If any parts, requirements or limitations contained in this certification are unacceptable, the Permittee has the right to request an adjudicatory hearing upon written request within 30 days following receipt of this permit. This request shall 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 at 6714 Mail Service Center, Raleigh, NC 27699-6714. Otherwise, this certification shall be final and binding. D Q � North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 1 1617 Mail Service Center ! Raleigh, North Carolina 27699-1617 NORTH CAROLINA i n.wmwm m e�wm�� a.ory 919.707.9000 Mr. J. Bryce Mendenhall September 1, 2020 Page 2 of 2 If you need any additional information concerning this matter, please contact Vivien Zhong at (919) 707-3627 or vivien.zhongkncdenr.gov. Sincerely, S. Daniel Smith, Director Division of Water Resources cc: Currituck County Health Department (Electronic Copy) Washington Regional Office, Water Quality Regional Operations Section (Electronic Copy) Robert G. Burgin, Jr., PE — Burgin Engineering Inc. (Electronic Copy) Laserfiche File (Electronic Copy) Digital Permit Archive (Electronic Copy) NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DEPARTMENT OF ENVIRONMENTAL QUALITY RALEIGH HIGH -RATE INFILTRATION 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 Carolina Water Service, Inc. of North Carolina Currituck County FOR THE operation of a 120,000 gallon per day (GPD) wastewater treatment and high -rate infiltration facility consisting of the: continued operation of an 80,000 GPD wastewater treatment plant (#1) consisting of a manually cleaned bar screen; a 20,000 gallon flow equalization tank; a flow measuring and recording system; three aeration tanks; two clarifiers; two sludge holding tanks; tertiary filters; a tablet chlorinator; a chlorine contact tank; and all associated piping, valves, controls, and appurtenances; the continued operation of an 80,000 GPD wastewater treatment plant (92) consisting of a 20,000 gallon influent surge tank with a 100 cubic feet per minute (CFM) blower; an 80,000 gallon aeration tank served by two 327 CFM blowers; two 12,000 gallon clarifiers; a 7,500 gallon sludge holding tank; two 28 square foot (ft) tertiary filters; a tablet chlorinator; a 1,680 gallon chlorine contact tank; an effluent flow meter; an automatically activated emergency standby generator; and all associated piping, valves, controls, and appurtenances; and the continued operation of a 120,000 GPD high -rate infiltration system consisting of: two 0.18 acre rotary distributors; a 0.18 acre, high -rate spray infiltration bed; and all associated piping, valves, controls, and appurtenances to serve the Corolla Light WWTP 91, with no discharge of wastes to surface waters, pursuant to the application received August 14, 2020, and in conformity with the Division -approved plans and specifications considered a part of this permit. This permit shall be effective from the date of issuance through October 31, 2021, and shall be subject to the following conditions and limitations: WQ0006254 Version 4.1 Shell Version 200201 Page 1 of 8 THIS PAGE BLANK ATTACHMENT A —LIMITATIONS AND MONITORING REQUIREMENTS PPI 001— WWTP Effluent Certification Date: September 1, 2020 Permit Number: WQ0006254 Version: 4.1 EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS PCS Code Parameter Description Units of Measure Monthly Average Monthly Geometric Mean Daily Minimum Daily Maximum Measurement Frequency Sample Type 00310 BOD, 5-Day (20 °C) mg/L 10 Weekly 1 / 2 x Month' Composite 00680 Carbon, Total Organic (TOC) mg/L 3 x Year' Composite 00940 Chloride (as Cl) mg/L 3 x Year' Composite 50060 Chlorine, Total Residual mg/L 5 x Week Grab 31616 Coliform, Fecal MF, M-FC Broth, 44.5 °C #/100 mL 14 43 Weekly 1 / 2 x Month' Grab 50050 Flow, in Conduit or thru Treatment Plant GPD 120,000 Continuous Recorder 00610 Nitrogen, Ammonia Total (as N) mg/L 4 Weekly 1 / 2 x Month 2 Composite 00625 Nitrogen, Kjeldahl, Total (as N) mg/L Weekly 1 / 2 x Month 2 Composite 00620 Nitrogen, Nitrate Total (as N) mg/L Weekly 1 / 2 x Month 2 Composite 00600 Nitrogen, Total (as N) mg/L Weekly 1 / 2 x Month 2 Composite 00400 pH su 5 x Week Grab 00665 Phosphorus, Total (as P) mg/L Weekly 1 / 2 x Month 2 Composite 70300 Solids, Total Dissolved — 180 °C mg/L 3 x Year' Composite 00530 Solids, Total Suspended mg/L 20 Weekly 1 / 2 x Month 2 Composite 1. Weekly sampling shall be conducted from May Pt through August 3 Pt. 2. 2 x Month sampling shall be conducted from September Pt through April 30th 3. 3 x Year sampling shall be conducted in March, July, and November. WQ0006254 Version 4.1 Attachment A Page 1 of 1 THIS PAGE BLANK ATTACHMENT B — APPROVED LAND APPLICATION SITES AND LIMITATIONS Carolina Water Service, Inc. of North Carolina — Corolla Light WWTP #1 Certification Date: September 1, 2020 Permit Number: WQ0006254 Version: 4.1 INFILTRATION AREA INFORMATION APPLICATION LIMITATIONS Field Owner County Latitude Longitude Net Acreage Dominant Parameter Rate Units Soil Series 1 Carolina Water Service, Inc. of NC Currituck 36.374688' -75.828331' 0.18 01284 — Non -Discharge Application Rate 5.09 GPD/$Z 40,000 GPD 2 Carolina Water Service, Inc. of NC Currituck 36.375263' -75.828329' 0.18 01284 — Non -Discharge Application Rate 5.09 GPD/$Z 40,000 GPD 5.09 GPD/$2 3 Carolina Water Service, Inc. of NC Currituck 36.375797' -75.828261' 0.18 01284 — Non -Discharge Application Rate 40,000 GPD Totals 0.54 WQ0006254 Version 4.1 Attachment B Page 1 of 1 THIS PAGE BLANK ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS Monitoring wells: MW-1, NM-2, NM-3, and NM-7 Certification Date: September 1, 2020 Permit Number: WQ0006254 Version: 4.1 GROUNDWATER CHARACTERISTICS GROUNDWATER STANDARDS MONITORING REQUIREMENTS PCS Code Parameter Description Daily Maximum Frequency Measurement Sample Type Footnotes 00680 Carbon, Tot Organic (TOC) mg/L 3 x Year Grab 1, 6 00940 Chloride (as Cl) 250 mg/L 3 x Year Grab 1 31616 Coliform, Fecal MF, M-FC Broth, 44.5 °C #/100 mL 3 x Year Grab 1 00610 Nitrogen, Ammonia Total (as N) 1.5 mg/L 3 x Year Grab 1 00620 Nitrogen, Nitrate Total (as N) 10 mg/L 3 x Year Grab 1 00400 pH 6.5-8.5 su 3 x Year Grab 1,2 00665 Phosphorus, Total (as P) mg/L 3 x Year Grab 1 70300 Solids, Total Dissolved - 180 °C 500 mg/L 3 x Year Grab 1 GWVOC Volatile Compounds (GC/MS) Present: Yes/No Annually Grab 1, 4, 5 82546 Water Level, Distance from measuring point feet 3 x Year Calculated L2,3 1. 3 x Year monitoring shall be conducted in March, July, and 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 623OD, PQL at 0.5 gg/L or less b. Standard Method 621 OD, PQL at 0.5 gg/L or less c. EPA Method 8021, Low Concentration, PQL at 0.5 gg/L or less d. EPA Method 8260, Low Concentration, PQL at 0.5 gg/L or less e. Another method with prior approval by the Water Quality Permitting Section Chief Any method used must meet the following qualifications: a. A laboratory must be DWR 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 gg/L or less that must be supported by laboratory proficiency studies as required by DWR. Any constituents detected above the MDL but below the PQL of 0.5 gg/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 Washington Regional Office 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/L 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/L, 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 1 and this attachment. WQ0006254 Version 4.1 Attachment C Page 1 of 1 Figure 1 —Aerial Map WQ0006254 1102 Corolla Village Rd., Corolla, NC 27927 Carolina Water Service, Inc. of NC Latitude: 36.375199' Corolla Light WWTP 91 Longitude: -75.827801' low, �� r r ir r� ti tir ■ o ilk 4- " 5 Figure 2 — Directional Map WQ0006254 1102 Corolla Village Rd., Corolla, NC 27927 Carolina Water Service, Inc. of NC Latitude: 36.375199' Corolla Light WWTP 91 Longitude: -75.827801' ° 'HwCi -- � U, Cr EW Mark Rarsinti r' 24l '+ -Nli l3 f �ilie #. D-I- • n ■ pr MgkxyjgAL� ` N q Ca1OWK Of Pal R; k IW up C,=OmAs •F nhcra Ixs A� wryrr{b3 L��h'I I� p ;L Y1 u 1- �1 { 1 Ji 7� M1.5 011 Gos" - Map data 02M-Gmigla . Figure 3 — Topographic Map WQ0006254 1102 Corolla Village Rd., Corolla, NC 27927 Carolina Water Service, Inc. of NC Latitude: 36.375199' Corolla Light WWTP 91 Longitude: -75.827801' e o 4 1 8 a� a l t D fi .. 1 N36° 22, 112' W71= 49 668' - .,rCk I I. fw 1 1 • r6 1 .J 2002 —L., ¢_ 3-D Topoquatls �i_ Data ,.pyrig Ft .f ¢onlent www.tl¢lorme_c owner_ , e Ye ` m N •01 }�