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Report Prepared by: Report Approved by: NPDES Compliance Sampling Inspection Report City of Salamanca Wastewater Treatment Plant (WWTP) 299 Center Street Salamanca, New York 14779 NPDES Permit: NY 0020508 Inspection Dates: June 21-22, 2023 THUAN TRAN Digitally signed by THUAN TRAN _________________D_ate_: _20_23_.0_8._03_1_3:2_4_:42_-_04_'00_' Thuan Tran, Physical Scientist Digitally signed by PHILIP PHILIP COCUZZA COCUZZA _________________D_at_e:_20_23_.0_8._03_1_5:2_3_:32_-_04_'0_0' Phil Cocuzza, Chief Monitoring Operations Section City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 1.0 OBJECTIVE Inspection Dates: June 21-22, 2023 On June 21-22, 2023, the United States Environmental Protection Agency (USEPA) conducted a National Pollutant Discharge Elimination System (NPDES) Compliance Sampling Inspection (CSI) at the City of Salamanca Wastewater Treatment Plant (WWTP) in Salamanca, New York (NY). The objective of the CSI was to gather information necessary to determine if the City of Salamanca WWTP is in compliance with the requirements and limitations set forth in their NPDES Permit; NY0020508. The permit became effective on December 01, 2019 and will expire on November 30, 2024. 2.0 KEY PARTICIPANTS Listed below are key inspection participants and contact information, grouped by organization. U.S. Environmental Protection Agency Thuan Tran, Lead Inspector 732-321-4455, email: tran.thuan@epa.gov Robert Morrell, Geologist Molly Hillenbrand, Environmental Scientist Seneca Nation of Indians-Health System Joel Merrill, Civil Engineer 716-945-5894 x5277, email: joel.merrill@senecahealth.org Scott John, SNI-Utilities Director City of Salamanca WWTP Mark Riley, Chief WWTP Operator 716-945-1691, email: mriley@salmun.com Dennis P. Hensel, City of Salamanca Board of Public Utilities General Manager 3.0 FACILITY DESCRIPTION 3.1 General Information The City of Salamanca WWTP is located on the Seneca Nation Territory in Salamanca, NY, but it is operated and maintained by the City of Salamanca. The wastewater treatment plant serves the City of Salamanca and the Town of Salamanca, as well as the Casino and Jimmersontown on the Seneca Nation Territory. The facility also receives metered wastewater from the Seneca Nation owned WWTP periodically. In addition, approximately 2, 2,000-gallons of septage per week are discharged into the sewer collection system at the designated manhole on Front Avenue near the boat launch. The City of Salamanca has fifteen (15) lift stations within the sewer collection system that assist the flow of wastewater to the main pump station. The main pump station located on Front Avenue is the only station with an emergency generator. The overall characteristic of the wastewater is approximately 80% domestic, 15% commercial, and 5% industrial. Page 2 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 Inspection Dates: June 21-22, 2023 The City of Salamanca WWTP is categorized under Standard Industrial Classification (SIC) 4952 - Sewerage Systems and the North American Industry Classification System (NAICS) 221320 - Sewage Treatment Facilities. 3.2 Process Information The City of Salamanca WWTP is permitted to treat 2.0 million gallons per day (MGD) of wastewater. The wastewater is pumped from the main pump station across the Allegheny River to the treatment plant. Preliminary treatment is provided through the mechanical bar screen to remove rags and large matters followed by the aerated grit chamber which allows heavy solids to settle out. The overflow from the aerated grit chamber continues along the Parshall Flume channel. The approaching flow is monitored by the Parshall Flume with an ultrasonic flow sensor. As the waste stream passes the Parshall Flume, it continues to the contact stabilization process to create a Mixed Liquor Suspended Solids (MLSS). As the MLSS exits the aeration tanks, it is distributed between two rectangular clarifiers for phase separation. The effluent from the clarifiers continues to the former chlorine contact chambers or polishing chambers. The effluent is disinfected through the Ultraviolet (UV) Disinfection Systems seasonally between May 15 to October 15. After the UV Disinfection Systems, the effluent free-falls into the effluent receiving pit where it is homogenized and aerated. The effluent continues along the discharged pipe and mixes with the Alleghany River via Outfall 001. Sludge from the rectangular clarifiers is either returned to the contact stabilization process as Return Activated Sludge (RAS) or pumped to the Primary Aerobic Sludge Digester as Waste Activated Sludge (WAS) with the scum. The Class B aerobically digested sludge is disposed by agriculture land injection on NYSDEC permitted fields. If the digested sludge is not subsurface land injected, it is dewatered through the belt filter press. The sludge cake, between 4-5% solids, is trucked to the Chautauqua County Landfill for disposal. The filtrate from the belt filter press is directed to the treatment system ahead of the aeration tanks. Rags and large matters from the mechanical bar screen, and grits from the aerated grit chamber are removed from the waste stream and are disposed of at the Chautauqua County Landfill. Filtrate from the mechanical bar screen and aerated grit chamber is returned to the waste stream for treatment. 3.3 Facility Self-Monitoring Information For permit compliance, the plant operators assembled and set-up automatic samplers at the designated monitoring locations to collect 24-hour composite samples. The sample containers are provided by their respective laboratories for 5-day Biochemical Oxygen Demand (BOD5), Total Suspended Solids (TSS), Total and Fecal Coliforms. BOD5 and TSS samples are picked up by a currier from LEPA Testing Service in Sayre, PA. Total and fecal coliform samples are transported on ice by the plant's operators to the Cattaraugus County Health Department in Olean, NY. Page 3 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 Inspection Dates: June 21-22, 2023 The plant operators collect and analyze on-site parameters for pH, Temperature, Settleable Solids (SS) and Dissolved Oxygen (DO). 4.0 EPA SAMPLING/INSPECTION ACTIVITIES 4.1 Sampling Activities An ISCO automatic composite sampler was programmed to take 96 sample aliquots during the 24-hour sampling event from the effluent receiving pit. The 24-hour composite sample was collected and analyzed for BOD5 and TSS. Five (5) direct-grab samples were collected for total and fecal coliforms. In addition, on-site grab samples were collected and analyzed for pH, Temperature, DO, SS, and Total Residual Chlorine (TRC) All sample containers, preservation techniques and holding times were in accordance with USEPA requirements specified in 40 CFR Part 136. Signed and dated custody seals were placed across the lids and along the sides of the sample containers. The custody sealed sample containers were placed inside plastic sample bags and sealed. All samples were transported on ice to the USEPA Laboratory in Edison, New Jersey for analysis, except for total and fecal coliform samples. Due to the short holding time, these samples were contracted to Lozier Environmental Consultant, Inc., in Rochester, NY, to be analyzed. Flow monitoring data were provided by the plant instrumentation that was calibrated on May 22, 2023. Split samples were collected and given to the facility representative. 4.2 Inspection Activities An NPDES CSI at the City of Salamanca WWTP was conducted on June 21-22, 2023. The inspectors met with Dennis Hensel; City of Salamanca Board of Public Utilities General Manager, Mark Riley; Chief Plant Operator, Joel Merrill; Seneca Nation of Indians-Health System Civil Engineer; and Scott John; SNI-Utilities Director. Inspector's credentials were presented, and business cards were provided during the opening conference. The facility representatives were explained that the purpose of the inspection with supporting on-site activities was to determine if the facility is in compliance with their NPDES Permit and the Federal Regulations. The on-site supporting activities consist of collecting samples at the influent and effluent monitoring locations, observing and evaluating the monitoring locations, observing and evaluating the wastewater treatment process, observing and evaluating the flow monitoring equipment, observing and evaluating the facility sampling equipment, observing and evaluating upstream and downstream of Outfall 001 in the Allegheny River, review and evaluate the facility testing procedures for the on-site parameters, and interviewing the facility's representatives. Page 4 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 Inspection Dates: June 21-22, 2023 During the closing conference, the facility representatives were briefed on the inspection activities. On-site sample results and concerns discovered or observed during the inspection were communicated to the facility representatives. 4.3 Deviations and/or Environmental Conditions Several operational activities were being performed at the WWTP during the inspection that could have potentially impacted the sampling event. The level of the contact stabilization process in the aeration tanks was below the discharge outlet. No incoming flow was observed entering the rectangular clarifiers. No overflow from the clarifier V-notch weirs was observed. Periodically, no discharged flow after the Ultraviolet Disinfection Systems was observed. As a result, the automatic composite sampler missed a few sample aliquots during the 24-hour sampling event. In addition, a mechanical issue was discovered from the influent automatic composite sampler on the second day of the survey. Furthermore, the facility has not been collecting nor analyzing TRC which is a permitted parameter. Instead, the facility has been collecting and analyzing DO since switching from gas chlorination to UV disinfection in May 2021. 5.0 ANALYTICAL RESULTS City of Salamanca WWTP - Outfall 001- Allegheny River Inspection Dates: June 21-22, 2023 Parameters Units NPDES Permit Limitations EPA Results Flow MGD 2.00 0.458 BOD5 MG/L 30 - 45 14 BOD5 Mass Loading LBS/DAY 500 - 750 53.5 BOD5 % Removal % Removal >/= 85 98 TSS MG/L 30 - 45 10 TSS Mass Loading LBS/DAY 500 - 750 38.2 TSS % Removal % Removal >/= 85 99 Fecal Coliform #/100-ML 200 Monthly Average 16.6 (Average) 400 Maximum Daily Total Coliform #/100-ML 2,400 Monthly Average 201 5,000 Maximum Daily (Geometric Mean) pH SU 6.0 - 9.0 6.73 TRC MG/L 1.0 Zero Temperature C Monitor 16 Settleable Solids ML/L 0.3 0.1 Dissolved Oxygen MG/L Not A Permitted Parameter 1st Run: 6.6 2nd Run: 6.8 Notes: Fecal Coliforms*: For the maximum daily effluent limitation, no more than 20% of the single samples of fecal coliform collected during any 30-day period must exceed a MPN of 400 per 100 ml. Total Coliforms*: This average monthly effluent limitation is expressed as a geometric (or log) mean, based on a minimum of five samples collected for any 30-day period. Page 5 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 6.0 FINDINGS 6.1 Sampling Result Findings Inspection Dates: June 21-22, 2023 The EPA analytical results obtained during this inspection are within the acceptable limits. 6.2 Inspection Findings In addition to the analytical data, an inspection of the facility operation was conducted as discussed in Section 4.2 above. During the inspection, the following observations were noted which may contravene the requirements of the permit or the applicable regulations: 6.2.1 Permit compliance samples were collected from one of the two UV channels. According to Section 10. Monitoring and Records [40 CFR 122.41(j)] of ATTACHMENT B: STANDARD CONDITIONS in the Permit, it states, "Samples and measurements taken for the purpose of monitoring shall be representative of the monitored activity." 6.2.2 When running the Settleable Solids (SS) test, the facility fills the Imhoff cone to the 1-liter mark. The sample is allowed to settle for 15 minutes before gently stirring. The sample is allowed to settle for 45 minutes longer before the SS volume is recorded. This is incorrect. According to Section 3- Procedure for Settleable Solids (SM-2540 F) in Standard Methods for the Determination of Water and Wastewater; 22nd Edition-2011, it states, "Fill an Imhoff cone to the 1-L mark with a well-mixed sample. Settle for 45 min, gently agitate sample near the sides of the cone with a rod or by spinning, settle 15 min longer, and record volume of settleable solids in the cone as milliliters per liter." 6.2.3 The facility is using expired pH powder pillows to make pH buffer solutions. The pH 4 powder pillows expired in February 2022. The pH 7 powder pillows expired in March 2022. The pH 10 powder pillows expired in August 2018. According to 40 CFR Part 122.41 (e) Proper Operation and Maintenance under Subpart C - Permit Condition, it states, "The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permittee to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures. In addition, 40 CFR Part 136.7 Quality Assurance and Quality Control states, "The permittee/laboratory shall use suitable QA/QC procedures when conducting compliance analyses with any Part 136 chemical method or any alternative method specified by the permitting authority." 6.2.4 In calibrating the portable HACH pH meter, the facility starts the pH calibration with the 4-buffer solution, followed by the 10-buffer solution, and finally the 7-buffer solution. This is incorrect. According to Section 4 - Procedure for pH Value (SM 4500-H+ B. Electrometric Method) in Standard Methods for the Determination of Water and Wastewater, 22nd Edition-2011, it states, "...place in initial buffer solution, Page 6 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 Inspection Dates: June 21-22, 2023 and set the isopotential point (4500-H+ .B.2a). Select a second buffer within 2 pH units of the sample pH and bring sample and buffer to same temperature, which may be the room temperature, a fixed temperature such as 25C, or the temperature of a fresh sample. Remove electrodes from the first buffer, rinse thoroughly with distilled water, blot dry, and immerse in second buffer........... Remove electrodes from second buffer, rinse thoroughly with distilled water and dry electrodes as indicated above. Immerse in a third buffer below pH 10, approximately 3 pH units different from the second; the reading should be within 0.1 unit for the pH of the third buffer." 6.2.5 It was observed that the working thermometer does not have a correction factor. The last time the working thermometer was last calibrated against a certified NIST (National Institute for Standards and Technology) thermometer could not be determined. A correction factor with the necessary information should accompany the working thermometer to ensure accurate temperature readings are recorded. According to 40 CFR Part 122.41 (e) Proper Operation and Maintenance under Subpart C - Permit Condition, it states, "The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permitted to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures. In addition, 40 CFR Part 136.7 Quality Assurance and Quality Control states, "The permittee/laboratory shall use suitable QA/QC procedures when conducting compliance analyses with any Part 136 chemical method or any alternative method specified by the permitting authority." 6.2.6 The approaching flow to the Parshall Flume is turbulence. As a result, the ultrasonic flow sensor is recording higher flow. According to the ISCO Open Channel Flow Measurement Handbook, Fifth Edition, Page 73 of Chapter 4: Flumes, it states, "The approaching flow should enter the converging section reasonably well distributed across the entrance width, and the flowlines should be essentially parallel to the flume centerline. Surges and waves of any appreciable size should be eliminated. Also, the flow at the flume entrance should be free of "white" water and free from turbulence in the form of visible surface boils." Furthermore 40 CFR Part 122.41 (e) Proper Operation and Maintenance under Subpart C - Permit Condition, it states, "The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permitted to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures." 6.2.7 It was observed that the Mixed Liquor Suspended Solids (MLSS) in the aeration tanks was dark grey. The MLSS should be tan or muddy in color to ensure a healthy population of microbes. Furthermore, the DO level of 5.0 milligrams per liter (mg/L) or greater is maintained in the aeration tanks. Ideally, the DO concentration should be maintained between 1-3 mg/L. According to 40 CFR Part 122.41 (e) Proper Operation and Maintenance under Subpart C - Permit Condition, it states, "The permittee shall at all times properly operate and maintain all facilities Page 7 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 Inspection Dates: June 21-22, 2023 and systems of treatment and control (and related appurtenances) which are installed or used by the permitted to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures." 6.2.8 Instead of settling out in the rectangular clarifiers, pin floc was observed overflowing the V-Notch weirs into the effluent trough that leads into the polishing chambers. According to 40 CFR Part 122.41 (e) Proper Operation and Maintenance under Subpart C - Permit Condition, it states, "The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permitted to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures." 6.2.9 Sludge bulking and bubbles were observed rising to the surface in the polishing chambers. These are indicators of a potential septic condition. Sludge should be removed from the polishing chambers. According to 40 CFR Part 122.41 (e) Proper Operation and Maintenance under Subpart C - Permit Condition, it states, "The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permitted to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures." 6.2.10 Solids were observed in the approaching water column to the UV Disinfection Systems. The walls and bottom of the UV Disinfection channels were observed cover with solids and/or algae growth. To effectively inactivate microorganisms, the water column should be free of organics, colloidal/suspended solids and other material that can absorb and scatter the UV light as it passes through. According to 40 CFR Part 122.41 (e) Proper Operation and Maintenance under Subpart C - Permit Condition, it states, "The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permitted to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures." 6.2.11 The effluent composite sample tubing was observed to be cover with dirt and/or algae growth on the inner wall. The dirt and/or algae growth could potentially become dislodged during the purging process and become part of the sample. Hence, the analytical result could be bias high. The tubing should be cleaned or replaced. According to Part II (D)(4) of the Permit, it states, "The Permittee shall develop and implement a quality assurance (QA) plan for laboratory analyses for effluent and/or receiving water monitoring." 6.2.12 No calibrated working thermometer was observed inside the portable refrigerated composite sampler. The composite sample must be chilled at 6C or less Page 8 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 Inspection Dates: June 21-22, 2023 throughout the sampling event. According to footnote 2 under Table II - Required Containers, Preservation Techniques, and Holding Times of 40 CFR Part 136, it states, " Except where noted in this Table II and the method for the parameter, preserve each grab sample within 15 minutes of collection. For a composite sample collected with an automated sample (e.g., using a 24-hour composite sample; see 40 CFR 122(g)(7)(i) or 40 CFR part 403, appendix E), refrigerate the sample at </= 6C during collection unless specified in this Table II or in the method(s)." 6.2.13 Total residual chlorine (TRC) is a permitted parameter with a maximum daily effluent limit of 1.0 milligram per liter (mg/L). Samples for TRC have not been collected nor analyzed since the UV Disinfection Systems became operational in May 2021. Instead, samples for DO have been collected and analyzed which is not in the permit. According to 40 CFR Part 122.41(a), it states, " The permittee must comply with all conditions of this permit." Page 9 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit: NY0020508 7.0 ATTACHMENTS Inspection Dates: June 21-22, 2023 Attachment #1. An overview map provides a layout of the buildings on the property. Attachment #2. Wastewater is treated through a contact stabilization process at the plant. Attachment #3. USEPA Chain of Custody for Fecal/Total Coliform Samples was submitted to Lozier Environmental Consulting, Inc. on Thursday, June 22, 2023. Attachment #4. Lozier Environmental Consulting, Inc., Laboratory Report for Fecal/Total Coliform Samples was received on Monday, June 26, 2023. Attachment #5. USEPA Chain of Custody for Samples was submitted to the USEPA Region 2 Laboratory in Edison, NJ on Thursday, June 22, 2023. Attachment #6. USEPA Analytical Data Package was received on Wednesday, June 28, 2023. 8.0 PHOTOGRAPHS Photo #1. An automatic composite sampler was set-up at the effluent receiving pit. Photo #2. An automatic composite sampler was set-up at the influent. Photo #3. Wastewater is pumped across the Allegheny River to the WWTP. Photo #4. Septic waste is drained into the designated manhole near the boat launch. Photo #5. The MLSS in the Contact Stabilization Process is dark grey in color. Photo #6. Solids are overflowing the V-Notch weirs into the clarifier effluent trough. Photo #7. Floating solids are observed in the former chlorine contact chamber. Photo #8. Higher flow is recorded by the ultrasonic sensor due to turbulence. Page 10 of 10 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit No.: NY0020508 Inspection Dates: June 21-22, 2023 7.0 Attachments Attachment #1. The City of Salamanca WWTP is located on 299 Center Street. City of Salamanca Wastewater Treatment Plant Property Attachment #2. Wastewater from the servicing areas is treated by the City of Salamanca WWTP. City of Salamanca Wastewater Treatment Plant Flow Diagram Attachment #3. The chain of custody for total and fecal coliform samples was submitted to the contract laboratory for analysis. NOTE: Sample "Preservative" should be "0" not "10" as shown on the chain of custody. - Thuan Tran Attachment #4. Analytical data for T/F coliform samples were received from Lozier Environmental Consulting, Inc. Attachment #5. USEPA Chain of Custody for Samples was submitted to the USEPA Laboratory in Edison, New Jersey. Attachment #6. USEPA Analytical Data Package was received on Wednesday, June 28, 2023. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory 2890 Woodbridge Avenue Edison , New Jersey 08837 732-906-6886 Phone 732-906-6165 Fax June 28, 2023 Philip Cocuzza Monitoring & Assessment Branch LSASD/MAB Edison, NJ 08837 RE: City of Salamanca WWTP - 2306011 Enclosed are the results of analyses for samples received by the laboratory on 06/22/2023. The signature below reflects the laboratory's approval of the reported results. If you have any questions concerning this report, please refer to Project Number 2306011 and contact the laboratory. Sincerely, John R. Bourbon Chief, LSASD/LB Project Narrative: UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: City of Salamanca WWTP - 2306011 Project Number: 2306011 The National Environmental Laboratory Accreditation Conference Institute (TNI) is a voluntary environmental laboratory accreditation association of State and Federal agencies. TNI established and promoted a National Environmental Laboratory Accreditation Program (NELAP) that provides a uniform set of standards for the generation of environmental data that are of known and defensible quality. The EPA Region 2 Laboratory is NELAP accredited. The Laboratory tests that are accredited have met all the requirements established under the TNI Standards. Condition Comments None Comment(s): The "Sample Analysis Date and Time" is included in the results section for any analyte with a prescribed holding time of 72 hours or less. Biochemical Oxygen Demand (BOD) Analysis: Sample 2306011-02 exhibited toxicity toward the seed organisms used for BOD. This is demonstrated by increasing BOD values as sample dilution increases. Only the result for the largest sample dilution is being reported instead of the average of all acceptable dilutions; the average is used when the sample does not exhibit toxicity. Since an even higher sample dilution may have produced a higher BOD result, this sample was qualified with an "L" to indicate the result is biased low. Data Qualifier(s): U- The analyte was not detected at or above the Reporting Limit. J- The identification of the analyte is acceptable; the reported value is an estimate. K- The identification of the analyte is acceptable; the reported value may be biased high. L- The identification of the analyte is acceptable; the reported value may be biased low. NJ- There is presumptive evidence that the analyte is present; the analyte is reported as a tentative identification. The reported value is an estimate. U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 6/28/2023 Page 1 of 5 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: City of Salamanca WWTP - 2306011 Project Number: 2306011 Reporting Limit(s): The Laboratory was able to achieve the appropriate limit for each analyte requested. Field ID Outfall 001 Influent SUMMARY REPORT FOR SAMPLES Laboratory ID 2306011-01 2306011-02 Matrix Aqueous Aqueous Date Sampled 06/22/2023 09:39 06/22/2023 09:56 Date Received 06/22/2023 19:00 06/22/2023 19:00 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 6/28/2023 Page 2 of 5 Analysis Biochemical Oxygen Demand Residue, Non-Filterable UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: City of Salamanca WWTP - 2306011 Project Number: 2306011 SUMMARY REPORT FOR METHODS Method SM 5210B SOP C-21 Rev 2.8 SM 2540D SOP C-33 Rev 3.8 Certification NELAP NELAP Matrix Aqueous Aqueous U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 6/28/2023 Page 3 of 5 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: City of Salamanca WWTP - 2306011 Project Number: 2306011 Analyte Field ID: Outfall 001 Sanitary Biochemical Oxygen Demand Total Suspended Solids Field ID: Influent Sanitary Biochemical Oxygen Demand Total Suspended Solids Result Qualifier Reporting Limit Units Batch Sample ID: 2306011-01 Date and Time of Analysis* 14.0 2.00 mg/L B306063 06/28/2023 08:22 10.0 10.0 mg/L B306064 Sample ID: 2306011-02 705 L 2.00 mg/L B306063 06/28/2023 08:22 1000 10.0 mg/L B306064 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 6/28/2023 Page 4 of 5 Analyte Batch B306063 Blank (B306063-BLK1) Biochemical Oxygen Demand LCS (B306063-BS1) Biochemical Oxygen Demand LCS (B306063-BS2) Biochemical Oxygen Demand LCS (B306063-BS3) Biochemical Oxygen Demand Matrix Spike (B306063-MS1) Biochemical Oxygen Demand Batch B306064 Blank (B306064-BLK1) Residue, Non-Filterable LCS (B306064-BS1) Residue, Non-Filterable LCS Dup (B306064-BSD1) Residue, Non-Filterable Duplicate (B306064-DUP1) Residue, Non-Filterable UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: City of Salamanca WWTP - 2306011 Project Number: 2306011 Sanitary - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit --- U 2.00 mg/L 206 mg/L 198.0 104 84.6-115.4 193 mg/L 198.0 97.6 84.6-115.4 171 mg/L Source: 2306011-02 853 2.00 mg/L 198.0 396.0 705 86.2 84.6-115.4 37.3 75-125 --- U 10.0 mg/L 60.0 10.0 mg/L 56.20 107 85-115 61.0 10.0 mg/L 56.20 109 85-115 1.65 20 Source: 2306011-01 9.00 10.0 mg/L 10.0 10.5 20 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 6/28/2023 Page 5 of 5 City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit No.: NY0020508 Inspection Dates: June 21-22, 2023 8.0 Photographs City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit No.: NY0020508 Inspection Dates: June 21-22, 2023 Photo #1. EPA automatic composite sampler was set-up at the effluent receiving pit. Photo #2. EPA automatic composite sampler was set-up at the influent sampling point. City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit No.: NY0020508 Inspection Dates: June 21-22, 2023 Photo #3. Wastewater is pumped from the Main Pump Station to the City of Salamanca WWTP. Photo #4. Septic waste is discharged into the designated sewer manhole near the boat launch. City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit No.: NY0020508 Inspection Dates: June 21-22, 2023 Photo #5. The color of the MLSS in the aeration tank was observed to be dark grey. Photo #6. Sludge and pin floc were observed overflowing into the clarifer effluent trough. City of Salamanca WWTP, Salamanca, NY 14779 NPDES Permit No.: NY0020508 Photo #7. Solids were observed in the polishing chambers. Inspection Dates: June 21-22, 2023 Photo#8. The approaching flow to the Parshall Flume was turbulence.