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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 4 Laboratory Services & Applied Science Division Environmental Sampling Section 980 College Station Road Athens, Georgia 30605-2720 May 25th, 2022 MEMORANDUM SUBJECT: Cary POTW Final Report Cary, MS LSASD Project ID: 22-0181 FROM: THRU: Chris McHugh, Environmental Engineer Water Quality Section Greg White, Chief Water Quality Section GREGORY WHITE Digitally signed by GREGORY WHITE Date: 2022.05.24 15:27:48 -04'00' TO: Jairo Castillo-Valenzuela, P.E., Chief Wastewater Enforcement Section Enforcement & Compliance Assistance Division Attached is the Final Report for the Cary POTW NPDES Reconnaissance Sampling Evaluation. If you have any questions concerning the sampling event, please call me at (706) 410-4082 or email me at mchugh.christopher@epa.gov. Attachments: cc (via email): Dennis Sayre, ECAD Mission: To provide sound Science to our customers through superior environmental evaluation Vision: To be a solutions-oriented organization, and seen as a leader in sound science through innovation, responsive customer service, and cutting-edge expertise Project ID: 22-0181 NPDES Reconnaissance Sampling Evaluation Report Cary POTW 30 Oak Circle Cary, Mississippi Project Date: March 29-30, 2022 Report Date: May 25th, 2022 Project Leader: Chris McHugh Environmental Engineer Water Quality Section Field Services Branch Laboratory Services and Applied Science Division U.S. EPA - Region 4 980 College Station Road Athens, Georgia 30605-2720 The ANSI National Accreditation Board attests that U.S. EPA Region 4 Laboratory Services and Applied Science Division fulfills the requirements of ISO/IEC 17025:2017 ANAB Forensic Testing & Calibration AR 3125:2019 in the field of Forensic Testing. The activities contained in this report fall within the scope of accreditation, Certificate Number: FT-0330. Expires 31 July 2022. LSASD Project: 22-0181 Page 1 of 7 NPDES Recon Sampling Evaluation Final Report Requestor: Jairo Castillo Chief Water Enforcement Branch Enforcement and Compliance Assurance Division U.S. EPA - Region 4 61 Forsyth Street SW Atlanta, GA, 30303-8960 Analytical Support: Inorganic Chemistry Section Laboratory Services and Applied Science Division 980 College Station Rd Athens, GA 30605 Approvals: LSASD Project Leader: CHRISTOPH CHRISTOPHER MCHUGH Digitally signed by ER MCHUGH -04'00' Date: 2022.05.24 14:47:53 Chris McHugh Water Quality Section Field Services Branch Laboratory Services and Applied Science Division Technical Reviewer: Digitally signed by DEREK LITTLE Date: 2022.05.24 15:04:03 -04'00' Derek Little Water Quality Section Field Services Branch Laboratory Services and Applied Science Division Approving Official: GREGORY WHITE Digitally signed by GREGORY WHITE Date: 2022.05.24 15:28:11 -04'00' Greg White, Chief Water Qualtiy Section Field Services Branch Laboratory Services and Applied Science Division LSASD Project: 22-0181 Page 2 of 7 NPDES Recon Sampling Evaluation Final Report Table of Contents 1. INTRODUCTION................................................................................................................. 4 2. SUMMARY ........................................................................................................................... 4 3. SAMPLE ANALYSIS RESULTS ....................................................................................... 5 List of Tables and Figures TABLE 1 - PERSONNEL AT FACILITY .................................................................................... 4 TABLE 2 - EPA SAMPLE RESULTS VS. PERMITTED LIMITS ............................................. 5 FIGURE 1 - SAMPLE COLLECTION POINT ............................................................................ 6 LSASD Project: 22-0181 Page 3 of 7 NPDES Recon Sampling Evaluation Final Report NPDES Sampling Evaluation Cary POTW (Permit No. MS0021547) 1. Introduction On March 29-30, 2022, representatives of the U.S. Environmental Protection Agency (U.S. EPA) Region 4 Laboratory Services and Applied Science Division (LSASD) conducted a National Pollutant Discharge Elimination System (NPDES) Reconnaissance Sampling Evaluation at Cary Publicly Owned Treatment Works (POTW) in Cary, Mississippi. The evaluation was requested by the ECAD Water Enforcement Branch as part of the agency's goal to address significant noncompliance (SNC) facilities. A 24-hr composite sample was collected and analyzed for Total Suspended Solids (TSS), Ammonia (NH3), and Biochemical Oxygen Demand (BOD5), listed on the issued NPDES Permit MS0021547. The inspection followed the procedures listed in the LSASD Project No. 22-00181-0183 Sample and Analysis Plan (SAP). Table 1 lists the sampling participants. Inspector Chris McHugh Asher Sampong Verna Gibbs Table 1 - Personnel at Facility Organization U.S. EPA Region 4 LSASD U.S. EPA Region 4 LSASD Cary POTW Operator Date(s) on site 3/29-30/2022 3/29-30/2022 3/29/2022 2. Summary The analytical results from the effluent discharge EFF001 were all within the NPDES permitted limits. The ultrasonic flow meter was not properly operating during the time of the inspection and hadn't been calibrated since June 2015. Properly function flow meters are essential for reporting accurate flow and calculating effluent discharge loading for the primary pollutants listed on the permit. The wastewater treatment system is an above the ground activated sludge plant. The treatment process consisted of two aeration basins and one clarifer basin, and a discharge basin, where chlorine-based disinfectant is used before final effluent discharge. Waste activated sludge (WAS) from the aeration basin is removed by a private septic company on a revolving basis determined by the facility operator. During the evaluation the operator said that the city of Cary has applied LSASD Project: 22-0181 Page 4 of 7 NPDES Recon Sampling Evaluation Final Report for a grant that would fund upgrades to its facility and lift stations. Upgrades are needed to allow the facility to continue adhering to its NPDES self-monitoring permit. 3. Sample Analysis Results Following the NPDES permit, a 24-hr time based composite sample was collected at the effluent discharge point (EFF001) after disinfection (see Figure 1). The analytical results were all within the permitted limits. Waypoint Analytical in Jackson, MS analyzes the facilities effluent discharge samples. Table 2 - EPA Sample Results vs. Permitted Limits Analyte TSS EPA Analytical Results 14 mg/L *J, H-6 Permitted Limit 45 mg/L Weekly Avg. Sample Location Effluent (EFF001) NH3 0.16 mg/L 1.5 mg/L Weekly Avg. Effluent (EFF001) BOD5 4.0 mg/L 4.5 mg/L Weekly Avg. Effluent (EFF001) pH 6.54 S.U. 6.0 S.U. < pH < 9.0 S.U. Effluent (EFF001) Dissolved Oxygen 8.47 mg/L 6.0 mg/L < Dissolved Oxygen Effluent (EFF001) Total Residual Chlorine 0.14 mg/L ** 0.019 mg/L Weekly Avg. Effluent (EFF001) ** This value is above the weekly average; however, the monitoring requirement is 5x per week to calculate the Total Residual Chlorine weekly average. The facility should evaluate the dosing to ensure that it doesn't lead to exceeding the weekly average of 0.019 mg/L. DATA QUALIFIER DEFINITIONS *H-6 Sample originally analyzed within holding time; some QC requirements not met. The reported result is from a second analysis performed for confirmation which occurred after the holding time expired. *J The identification of the analyte is acceptable; the reported value is an estimate. LSASD Project: 22-0181 Page 5 of 7 NPDES Recon Sampling Evaluation Final Report Figure 1 - Sample Collection Point LSASD Project: 22-0181 Page 6 of 7 NPDES Recon Sampling Evaluation Final Report Appendix A The following table lists the total number of pages for each of the Analytical Datasheets for this report. Each document is contained in the PDF portfolio. R4LIMS ID 22-0181 Lab ID E221401-01 Analysis TSS, BOD5, NH3 Total Pages 8 End of Report LSASD Project: 22-0181 Page 7 of 7 NPDES Recon Sampling Evaluation Final Report UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 D.A.R.T. Id: 22-0181 Project: 22-0181, Cary POTW - Reported by Kristin Trapp April 20, 2022 MEMORANDUM SUBJECT: FROM: THRU: TO: FINAL Analytical Report Project: 22-0181, Cary POTW Kristin Trapp LSB Inorganic Chemistry Section Chief Stacie Masters, Chief Laboratory Services Branch Christopher McHugh Attached are the final results for the analytical groups listed below. This report shall not be reproduced except in full without approval of the Region 4 laboratory. These analyses were performed in accordance with the Laboratory Services Branch's Laboratory Operations and Quality Assurance Manual (LSB LOQAM) found at www.epa.gov/region4/sesd/asbsop. Any unique project data quality objectives specified in writing by the data requestor have also been incorporated into the data unless otherwise noted in the Report Narrative. Chemistry data have been verified based on the LSB LOQAM specifications and have been qualified by this laboratory if the applicable quality control criteria were not met. Verification is defined in Chapter 5 of the LSB LOQAM. For a listing of specific data qualifiers and explanations, please refer to the Data Qualifier Definitions included in this report. The reported results are accurate within the limits of the method(s) and are representative only of the samples as received by the laboratory. Analyses Included in this report: Method Used: Accreditations: Classical/Nutrient Analyses (CNA) Ammonia as N Demand Solids EPA 350.1 (Water) ISO SM 5210B (Water) ISO USGS I-3765-85 (Water) ISO Page 1 of 8 E221401 CNA FINAL 04 20 22 1415 4/20/22 14:15 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 D.A.R.T. Id: 22-0181 Project: 22-0181, Cary POTW - Reported by Kristin Trapp Sample Disposal Policy Due to limited space for long term sample storage, LSB's policy is to dispose of samples on a periodic schedule. Air samples collected in summa canisters will be disposed of 30 days following the issuance of this report. All other sample media including original samples, sample extracts and or digestates will be disposed of, in accordance with applicable regulations, 60 days from the date of this report. This sample disposal policy does not apply to criminal samples which are held until the laboratory is notified by the criminal investigators that case development and litigation are complete. These samples may be held in the laboratory's custody for a longer period of time. If samples require storage beyond the 60-day period, please contact the Sample Control Coordinator by e-mail at R4SampleCustody@epa.gov. Page 2 of 8 E221401 CNA FINAL 04 20 22 1415 4/20/22 14:15 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 D.A.R.T. Id: 22-0181 Project: 22-0181, Cary POTW - Reported by Kristin Trapp SAMPLES INCLUDED IN THIS REPORT Project: 22-0181, Cary POTW Sample ID 22-0181-0001 Laboratory ID E221401-01 Matrix Municipal Eff. Wastewater Date Collected 3/30/22 12:45 Date Received 3/31/22 11:15 Page 3 of 8 E221401 CNA FINAL 04 20 22 1415 4/20/22 14:15 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 D.A.R.T. Id: 22-0181 Project: 22-0181, Cary POTW - Reported by Kristin Trapp DATA QUALIFIER DEFINITIONS H-6 Sample originally analyzed within holding time; some QC requirements not met. The reported result is from a second analysis performed for confirmation which occurred after the holding time expired. J The identification of the analyte is acceptable; the reported value is an estimate. ACRONYMS AND ABBREVIATIONS CAS Chemical Abstracts Service Note: Analytes with no known CAS identifiers have been assigned codes beginning with "E", the EPA ID as assigned by the EPA Substance Registry System (www.epa.gov/srs), or beginning with "R4-", a unique identifier assigned by the EPA Region 4 laboratory. MDL Method Detection Limit - The minimum concentration of a substance (an analyte) that can be measured and reported with a 99% confidence that the analyte concentration is greater than zero. MRL Minimum Reporting Limit - Analyte concentration that corresponds to the lowest demonstrated level of acceptable quantitation. The MRL is sample-specific and accounts for preparation weights and volumes, dilutions, and moisture content of soil/sediments. TIC Tentatively Identified Compound - An analyte identified based on a match with the instrument software's mass spectral library. A calibration standard has not been analyzed to confirm the compound's identification or the estimated concentration reported. ACCREDITATIONS: ISO Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Laboratories. Refer to the certificate and scope of accreditation FT-0330 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd NR Not accredited for this test. DW Accredited for conformance with ISO/IEC 17025:2017 and testing elements in the Fifth Edition of the Manual for the Certification of Laboratories Analyzing Drinking Water, EPA 815-R-05-004, 2005. Refer to the certificate and scope of accreditation AT-2628 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd ISO/DW Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Labs, and conformance with ISO/IEC 17025:2017 and testing elements in the Manual for the Certification of Laboratories Analyzing Drinking Water. Page 4 of 8 E221401 CNA FINAL 04 20 22 1415 4/20/22 14:15 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 D.A.R.T. Id: 22-0181 Project: 22-0181, Cary POTW - Reported by Kristin Trapp Project: 22-0181, Cary POTW Classical/Nutrient Analyses Sample ID: 22-0181-0001 Station ID: EFF001 Date Collected: 3/30/22 12:45 CAS Number Analyte Lab ID: E221401-01 Matrix: Municipal Eff. Wastewater Results Qualifiers Units MRL Prepared Analyzed Method 7664-41-7 E1640606 E1642818 Ammonia as N BOD, 5 Day Total Suspended Solids 0.16 4.0 14 J, H-6 mg/L mg/L mg/L 0.050 2.0 5.0 4/04/22 18:07 4/01/22 11:01 4/04/22 8:40 4/07/22 EPA 350.1 10:48 4/06/22 10:10 SM 5210B 4/04/22 USGS I-3765-85 8:40 Page 5 of 8 E221401 CNA FINAL 04 20 22 1415 4/20/22 14:15 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 D.A.R.T. Id: 22-0181 Project: 22-0181, Cary POTW - Reported by Kristin Trapp Analyte Batch 2203098 - C SM5210 BOD Blank (2203098-BLK1) SM 5210B BOD, 5 Day Classical/Nutrient Analyses (CNA) - Quality Control US-EPA, Region 4, LSASD Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD Prepared: 04/01/22 Analyzed: 04/06/22 U 2.0 mg/L RPD Limit Notes U LCS (2203098-BS1) SM 5210B BOD, 5 Day 206.70 Prepared: 04/01/22 Analyzed: 04/06/22 2.0 mg/L 198.00 104 84.6-115.4 LCS (2203098-BS2) SM 5210B BOD, 5 Day 208.20 Prepared: 04/01/22 Analyzed: 04/06/22 2.0 mg/L 198.00 105 84.6-115.4 LCS (2203098-BS3) SM 5210B BOD, 5 Day 210.70 Prepared: 04/01/22 Analyzed: 04/06/22 2.0 mg/L 198.00 106 84.6-115.4 Batch 2204004 - C 350.1 Ammonia Blank (2204004-BLK1) EPA 350.1 Ammonia as N LCS (2204004-BS1) EPA 350.1 Ammonia as N Matrix Spike (2204004-MS1) EPA 350.1 Ammonia as N Matrix Spike (2204004-MS2) EPA 350.1 Ammonia as N Matrix Spike Dup (2204004-MSD1) EPA 350.1 Ammonia as N Prepared: 04/04/22 Analyzed: 04/07/22 U 0.050 mg/L U 0.95500 Prepared: 04/04/22 Analyzed: 04/07/22 0.050 mg/L 1.0000 95.5 90-110 Source: E221401-01 1.1240 0.050 mg/L Prepared: 04/04/22 Analyzed: 04/07/22 1.0000 0.15600 96.8 90-110 Source: E221402-01 7.8320 0.10 mg/L Prepared: 04/04/22 Analyzed: 04/07/22 1.0000 6.7740 106 90-110 Source: E221401-01 Prepared: 04/04/22 Analyzed: 04/07/22 1.0980 0.050 mg/L 1.0000 0.15600 94.2 90-110 2.34 10 Page 6 of 8 E221401 CNA FINAL 04 20 22 1415 4/20/22 14:15 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 D.A.R.T. Id: 22-0181 Project: 22-0181, Cary POTW - Reported by Kristin Trapp Analyte Batch 2204004 - C 350.1 Ammonia Matrix Spike Dup (2204004-MSD2) EPA 350.1 Ammonia as N Classical/Nutrient Analyses (CNA) - Quality Control US-EPA, Region 4, LSASD Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD Source: E221402-01 Prepared: 04/04/22 Analyzed: 04/07/22 8.0340 0.10 mg/L 1.0000 6.7740 126 90-110 2.55 RPD Limit Notes 10 QM-2 MRL Verification (2204004-PS1) EPA 350.1 Ammonia as N 0.054000 Prepared: 04/04/22 Analyzed: 04/07/22 0.050 mg/L 0.050000 108 70-130 MRL-2 Batch 2204008 - C 2540 Solids Blank (2204008-BLK1) USGS I-3765-85 Total Suspended Solids LCS (2204008-BS1) USGS I-3765-85 Total Suspended Solids LCS Dup (2204008-BSD1) USGS I-3765-85 Total Suspended Solids Duplicate (2204008-DUP1) USGS I-3765-85 Total Suspended Solids MRL Verification (2204008-PS1) USGS I-3765-85 Total Suspended Solids Prepared & Analyzed: 04/04/22 U 5.0 mg/L 95.800 Prepared & Analyzed: 04/04/22 5.0 mg/L 100.00 95.8 77.1-110 96.700 Prepared & Analyzed: 04/04/22 5.0 mg/L 100.00 96.7 77.1-110 0.935 Source: E221402-01 Prepared & Analyzed: 04/04/22 1.8000 5.0 mg/L 1.3000 32.3 2.9000 Prepared & Analyzed: 04/04/22 5.0 mg/L 5.0000 58.0 57.1-130 U 10 10 QM-4, U MRL-2, U Page 7 of 8 E221401 CNA FINAL 04 20 22 1415 4/20/22 14:15 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 D.A.R.T. Id: 22-0181 Project: 22-0181, Cary POTW - Reported by Kristin Trapp U MRL-2 QM-2 QM-4 Notes and Definitions for QC Samples The analyte was not detected at or above the reporting limit. MRL verification for Non-Potable Water matrix Matrix Spike Recovery greater than method control limits Matrix Precision outside method control limits Page 8 of 8 E221401 CNA FINAL 04 20 22 1415 4/20/22 14:15