Document 65vXZDaB0vMx0zOe30Z0voZdo

REGION 5 Enforcement and Compliance Assurance Division INSPECTION REPORT Inspection Date(s): Time: Media: Statute(s)/Program(s): Type of inspection: Access: 06/29/2022 - 06/29/2022 Announced: Yes Entry: 09:15 AM (CT) Exit: 02:30 PM (CT) Water Clean Water Act, NPDES, WWTP CEI - Compliance Evaluation Inspection Granted Permittee Name: Facility or Site Name: Facility/Site Physical Address: (City, state, zip code) County: Facility GPS Coordinates: UPPER SIOUX COMMUNITY USC WASTEWATER TREATMENT FACILITY UPPER SIOUX LNDIAN RESERVATION (Latitude: 4445' N, Longitude: 9529' W) GRANITE FALLS, MN 56241 YELLOW MEDICINE 4445' N, 9529' W Facility/Site Identifier: Permit Number: 110043182631 MN0075001 Persons Participating in Inspection: Title Name Phone Lead Inspector Inspector Inspector Tribal Utility Consultant, IHS USC Director of Public Works Lead Inspector: Dean Maraldo Dean Maraldo Matthew Schulte Monica Dix Mike Termont, P.E. Matt Schommer (312) 353-2098 (312) 886-2405 (312) 886-0650 (320) 564-6335 [Signature] REGION 5 Email Maraldo.Dean@e pa.gov Present at Opening Conf. Yes Present at Closing Conf. Yes Schulte.Matthew Yes @epa.gov dix.monica@epa.gov Yes michael.termont No @ihs.gov matts@uppersiouxcom Yes munity-nsn.gov DINO MARALDO Digitally signed by DINO MARALDO Date: 2022.07.05 09:37:40 -05'00' maraldo.dean@epa.gov Yes Yes Yes Yes (312) 353-2098 Supervisor Review: Ryan Bahr [Signature] REGION 5 1 of 20 Digitally signed by Bahr, Bahr, Ryan Ryan Date: 2022.07.08 13:15:44 -05'00' bahr.ryan@epa.gov UPPER SIOUX COMMUNITY Inspection Date: 06/29/2022 SECTION I - INTRODUCTION Site Entry and Inspection Objectives NPDES inspection I, Region 5 Lead Inspector, Dean Maraldo, arrived at the Upper Sioux Community (the "Site" or "Facility"), located at coordinates 4445' N, 9529' W, at 09:15 AM (CT) on 06/29/2022 for an announced inspection. Region 5 Inspectors Monica Dix and Matthew Schulte joined me for the inspection. I presented my credentials to Matt Schommer, the Director of Public Works ("Director") and informed him that this was a Region 5 inspection to determine compliance with the Clean Water Act (CWA) and the National Pollutant Discharge Elimination System (NPDES) permit program. The inspection was conducted under the authority of the Federal CWA (Section 308). The table above identifies the attendees that participated in the inspection. This report is based on information supplied by Facility representatives, observations made by the Region 5 inspectors, and records and reports maintained by the permittee and the Region 5 inspectors, including: direct observations made by the Region 5 inspectors, photographs taken by Region 5 inspectors, physical evidence collected by the Region 5 inspectors, verbal or written statements made by or information supplied by Facility representatives (the permittee) during or subsequent to the on-site inspection, and materials, processes, data, photographs, or documents shown, demonstrated, or submitted to the Region 5 inspectors by Facility representatives during or subsequent to the on - site Inspection. In addition, information gathered prior to or subsequent to the inspection from a review of USEPA, State, and public records may be included in this report. After opening introductions, we went over the inspection plan for the day. I asked if there were any questions. The Director had no questions. Facility/Site Description I began by asking about the Facility information provided in the latest published permit fact sheet (2012). The Director confirmed the following: Wastewater flows are pumped to the treatment facility from three lift stations. Raw screening removes large objects from the waste stream prior to the treatment units. Biological treatment is accomplished utilizing a membrane bioreactor process. This process consists of an extended aeration activated sludge basin followed by membrane filters. Prior to entering the membrane filtration tanks, fine screens remove any fibrous material which may damage the membranes. In addition to the membrane system, final clarifiers (2) designed to handle periods of high hydraulic load to the facility provide solids separation for a portion of the facility flow. Disinfection is accomplished utilizing ultraviolet disinfection. The average daily design flow is 63,445 gallons per day, the average wet weather design flow is 95,061 gallons per day, the peak design day flow is 107,531 gallons per day and the peak hourly design flow is 130,000 gallons per day. The effluent discharges through Outfall 001 to the Minnesota River (Latitude: 4445' N, Longitude: 9529' W). Collection system includes about 6 miles of sewer. 2 of 18 UPPER SIOUX COMMUNITY Inspection Date: Facility/Site Information Responses below provided by the Director. 06/29/2022 WWTP Approx. # of residents served WWTP AverageDaily Flow Outfalls Operation schedule Do you use in-house or contract out for laboratory analyses? Do you accept waste from septage haulers? Is there currently any portion of the treatment train that is non-operational? Are there any plans for renovation or additional equipment to allow for increased wastewater flow? Name/Grade of Operator in Responsible Charge Is a copy of the current permit onsite (40CFR122.41)? Has a permit reapplication package been submitted to EPA? (40CFR122.21) 68 connections and approx. 150 residents 60-70k 001 7am-3pm, plus weekend checkup, and on call holidays MVTL labs, in-house DO, pH. No No Yes, add pumps to EQ tank. Matt Schommer, Class D Yes Yes Inspection Units Unit/Area DMR Review Other Non-DMR Reports Additional Monitoring Flow Measurement Self Monitoring Operations and Maintenance SSOs/CSOs Pretreatment Wastewater Treatment Plant Components Headworks Aeration Tanks Clarifiers Membrane bioreactor Ultraviolet (UV) Treatment System Final Outfall 001 Description Interview questions and observations Physical inspection 3 of 18 UPPER SIOUX COMMUNITY Inspection Date: 06/29/2022 SECTION II - OBSERVATIONS Observations may not be in sequential order. Unit: Interview/DMR Review Observation #: DM1-OB-001 Contains CBI: No Date: 06/29/2022 Reviewed chronic effluent limit exceedances: 30 effluent limit exceedances were reported by the Facility from February 2018 to April 2022. According to the Director, TSS, Phosphorus, and Carbonaceous Biochemical Oxygen Demand (CBOD5) violations may be due to a tear in MBR membrane. Assuming a tear, MBR filters scheduled for replacement this year. The Director hoping the new pumps might help with consistent flow. Document(s) 1. Upper Sioux ELVs_20220627.pdf Unit: Interview/Other Non-DMR Reports Observation #: DM1-OB-002 Contains CBI: No Date: 06/29/2022 The permittee shall implement an Operation & Maintenance Plan (including O&M plan, treatment system map, PMP, asset inventory, OM&R budget), that was developed during the last permit term, which is available to EPA upon request, pursuant to Part I.B.3.a. Status of O&M Plan status report due Jan 31, each year until complete (Part I.B.3.b): The Director was not aware of status of O&M Plan, and will ask consultant (Bolton Menk Engineering) for status. Unit: Interview/Additional Monitoring Observation #: DM1-OB-003 Contains CBI: No Date: 06/29/2022 Additional Monitoring: pursuant to Permit Part I.B.8, the Facility shall monitor the discharge from Outfall 001 for the constituents Total Kjeldahl Nitrogen (TKN), Nitrate plus Nitrite Nitrogen, Oil and Grease, Total Dissolved Solids (TDS), and Ammonia (as N). Testing shall be conducted in January 2018, April 2019, July 2020 and October 2021 to represent seasonal changes. The Director said all additional monitoring is done and provided lab reports (attached). The lab reports show that the April 2019 monitoring event was actually conducted in May 2019, the July 2020 monitoring event was actually conducted in August 2021, and the October 2021 monitoring event was actually conducted in May 2022. Document(s) 1. Additional Monitoring Lab Reports.pdf 4 of 18 UPPER SIOUX COMMUNITY Inspection Date: 06/29/2022 Unit: Interview/Flow Measurement Observation #: DM1-OB-004 Contains CBI: No Date: 06/29/2022 Are influent (if applicable) and effluent flow measuring device(s) professionally calibrated, at least once per year? (40CFR122.41(e). The Director said mag meters are calibrated annually, and calibration records are kept. They also read influent flow levels using notch weir. Unit: Interview/Self Monitoring Observation #: DM1-OB-005 Contains CBI: No Date: 06/29/2022 The Director provided responses to following self monitoring questions: Are required composite samples flow proportioned? Yes Are composite samples cooled to <4C to properly preserve them during the compositing period? (40CFR136): Believe so. Are all grab samples cooled with ice, gel packs or refrigerated to <6 o C from the time of collection until analysis including shipping time, if applicable? Yes, put in coolers with ice packs. Are all samples which require preservation properly preserved? (40CFR122.41(e),40CFR136. Yes, lab provides preservation for certain parameters. Describe pH and DO monitoring procedure? Use Hach probe upon collection of sample. I asked if pH/DO field sample collection and analysis times are recorded on data sheets. The Director said data sheets do not include collection and analysis times. I recommended they add columns to include sample collection time and analysis time for Ph and DO. Unit: Interview/Operations and Maintenance Observation #: DM1-OB-006 Contains CBI: No Date: 06/29/2022 The Director provided responses to following operations and maintenance questions: Are all treatment units operable? Yes On a regular basis, do operators monitor the key operating parameters, interpret the data in relation to the effluent quality and sludge settleability, and conducting the necessary adjustments to meet the limits of the Permit? Operators pull mixed liquor every other day or so, and at least once a week at MBR and aeration tank. Any Bypasses? No 5 of 18 UPPER SIOUX COMMUNITY Inspection Date: 06/29/2022 Does the wastewater treatment facility have an alarm system for all essential equipment? SCADA at the plant, no lift stations on SCADA expect lift station 3 that alerts of alarm only. All lift stations have beacons. Lift stations running well. Are alarms sent to qualified personnel who can respond immediately to remedy the problem? yes, call chain. Are routine and preventive maintenance scheduled performed and recorded? Record scheduled maintenance to do list and list of what has been done. Does the Facility maintain written procedures for responding to emergencies such as power failures, floods, fires, and other natural disasters? They follow police department procedures. Is a logbook kept which documents all plant activities on a daily basis? Yes. Does the Facility maintain an inventory of spare parts, either at the Facility or close by, sufficient to keep all of its treatment units operational? Yes, but not kept up to date. Does the Facility have standby power for all treatment units? Yes, generators at plant. All lift stations have generators. Service contract with generator service company; auto startup once a week. Staffing: two certified operators, Matt Schommer and one other certified for NPDES. Another technician in training. Same staff for drinking water plant. Staff also work on property maintenance, plowing, elder requests. Fees: user and usage fee for wastewater and water. Unit: Interview/SSOs/CSOs Observation #: DM1-OB-007 Contains CBI: No Date: 06/29/2022 The Director provided responses to the questions below: SSOs: Have there been any backups or overflows in the sanitary sewer collection system, including pump stations, manholes and piping over the last three years? No, except RV park incident in spring 2022. Heavy rainfall. RV company contractor adding services to primitive sites, and placed manhole cover on top of a wood pallet on top of manhole, allowing rainwater into the collection system. They were able to manage flow at the plant without issues. The overflow was reported to EPA pursuant to permit requirements. The overflow did not impact surface water. CSOs: Is any portion of the Facility's sewage collection system combined with the storm water collection system with designated outfalls? No. 6 of 18 UPPER SIOUX COMMUNITY Inspection Date: Unit: Interview/Pretreatment Observation #: DM1-OB-008 Contains CBI: No Date: 06/29/2022 06/29/2022 The Director provided responses to the following pretreatment questions: Any industrial connections? No. Commercial connections? Yes, casino and convenient store and gas station. No IUs. Casino: about 70% of flow. Casino has own big dipper (grease pit), to separate grease, remaining gets pumped to plant (Lift Station #1). Grease action plan in place. After casino lift station there are a few homes with E1 pumps. Two lift stations send flow to the plant. In general, the casino doesn't cause problems. Consistent flow through seasons. Unit: Physical inspection of WWTF/Headworks Observation #: DM1-OB-009 Contains CBI: No Date: 06/29/2022 We began the physical plant inspection at 12:40 pm on June 29, 2022. We were joined by Mike Termont (Indian Health Service). The Director led the physical inspection tour. I confirmed there were no CBI concerns regarding photographs or documentation. Headworks room: I observed the primary screw screen (see photo UPSC0001). The Director said the system is working well. I also observed the influent flow meter and parshall flume (see photo UPSC0002). The headworks also includes a backup bar screen used when the primary screw screen is under maintenance (see photo UPSC0003). Photo(s) UPSC0001.JPG; UPSC0002.JPG; UPSC0003.JPG Unit: Physical inspection of WWTF/Aeration Tanks Observation #: DM1-OB-010 Contains CBI: No Date: 06/29/2022 Aeration tanks. Receive flow from headworks. I observed the two covered extended aeration and equalization tanks. See view inside an aeration tank hatch in photo UPSC0004. The covered aeration tanks and equalization tanks are shown in photo UPSC0005. Photo(s) UPSC0004.JPG; UPSC0005.JPG; 7 of 18 UPPER SIOUX COMMUNITY Inspection Date: 06/29/2022 Unit: Physical inspection of WWTF/Clarifiers Observation #: DM1-OB-011 Contains CBI: No Date: 06/29/2022 Final clarifiers and effluent tank. I observed the two final clarifiers that receive partial flow from the aeration basins/EQ tanks. According to the Director, flow is distributed between the MBR and final clarifier. He provided a copy of the June 2022 WWTP log sheet (attached) showing effluent flow volumes from clarifiers and MBR. The clarifiers receive any flows the MBRs cannot handle. This situation can occur during drinking water tower backwash events, high flows, or significant casino events. The Director also explained that they are planning to install new pumps in the EQ basins to help regulate and provide consistent flows to the MBRs to reduce the need to use clarifiers. Effluent from clarifiers flows to the UV treatment system. See overview photo of covered clarifiers and effluent tank (photo UPSC0006). Document(s) 1. WWTP flow log_June 2022.pdf Photo(s) UPSC0006.JPG Unit: Physical inspection of WWTF/Final Outfall 001 Contains CBI: No Observation #: DM1-OB-012 Date: 06/29/2022 I observed final outfall 001 to the Minnesota River. The river level was too high to observe the outfall pipe and discharge characteristics (see photo UPSC0007). Photo(s) UPSC0007.JPG Unit: Physical inspection of WWTF/Backup Generator Observation #: DM1-OB-013 Contains CBI: No Date: 06/29/2022 I observed the Facility's backup generator (photo UPSC0008). The generator runs on propane. Photo(s) UPSC0008.JPG Unit: Physical inspection of WWTF/SCADA System Observation #: DM1-OB-014 Contains CBI: No Date: 06/29/2022 I observed the Facility SCADA system (photo UPSC0009). Photo(s) UPSC0009.JPG 8 of 18 UPPER SIOUX COMMUNITY Inspection Date: Unit: Physical inspection of WWTF/Influent/Effluent Contains CBI: No Auto Samplers Observation #: DM1-OB-015 Date: 06/29/2022 06/29/2022 I observed the effluent (photo UPSC0010) and influent (UPSC0011) auto samplers. I noted that both auto samplers lacked thermometers to confirm samples are cooled and preserved as required by Permit Part II.3.C and 40 CFR Part 136. Mike Termont confirmed the influent auto sampler was configured for flow-based collection. The Director confirmed the effluent auto sampler was programmed to collect flow-based samples. Photo(s) UPSC0010.JPG; UPSC0011.JPG Unit: Physical inspection of WWTF/Membrane Bioreactor Observation #: DM1-OB-016 Contains CBI: No Date: 06/29/2022 I observed the Membrane Bioreactor (MBR) system (photo UPSC0012). The Director explained there are three filters in series on each side of the MBR. MBR cleaning solution tanks are shown in photo UPSC0015 (Azone chlorine tank in foreground, citric tank in background). Treated flow from the MBR goes to the utility tank and then to the UV treatment system. Photo(s) UPSC0012.JPG; UPSC0015.JPG Unit: Physical inspection of WWTF/Ultraviolet (UV) Treatment System Observation #: DM1-OB-017 Contains CBI: No Date: 06/29/2022 I observed the UV treatment system, which consists of two parallel bulb banks (photo UPSC0013). The Director explained that they alternate bulb banks every year. Photo UPSC0014 shows the currently operational UV bank and the treated effluent. Photo(s) UPSC0013.JPG; UPSC0014.JPG Unit: Physical inspection of WWTF/Ferric Tank Observation #: DM1-OB-018 Contains CBI: No Date: 06/29/2022 The last stop in the physical Facility inspection was the ferric chloride tank (photo UPSC0016). Photo(s) UPSC0016.JPG 9 of 18 UPPER SIOUX COMMUNITY Inspection Date: SECTION III - RECORDS REVIEW Record: Lab Bench Sheets Ref #: DM1-RR-001 Reviewed By: Dean Maraldo 06/29/2022 AOC: No Reviewed Date: 06/29/2022 I reviewed Wastewater Treatment Plant onsite monitoring logs for April -June 2022. No DO or pH effluent limit exceedances were identified and samples were collected pursuant to sampling requirements. Document(s) 1. WWTP logs.pdf SECTION IV - SAMPLING ACTIVITIES AND ANALYTICAL RESULTS No sampling was conducted. SECTION V - AREAS OF CONCERN Areas of Concern may not be in sequential order. The presentation of areas of concern does not constitute a formal compliance determination or violation. Unit: Interview DM1-OB-001 Area: DMR Review 30 effluent limit exceedances were reported by the Facility from February 2018 to April 2022. TSS, Phosphorus, and CBOD5 violations may be due to a tear in MBR membrane. Assuming a tear, MBR filters scheduled for replacement this year. Citations: Permit Part I.A.I (Final Effluent Limitations); Permit Part I.B.3 (Operation and Maintenance) Unit: Interview DM1-OB-003 Area: Additional Monitoring Additional Monitoring: lab reports show that the April 2019 monitoring event was actually conducted in May 2019, the July 2020 monitoring event was actually conducted in August 2021, and the October2021 monitoring event was actually conducted in May 2022. Citations: Permit Part I.B.8 (Additional Monitoring) Pursuant to the Permit, the Facility shall monitor the discharge from Outfall 001 for the constituents TKN, Nitrate plus Nitrite Nitrogen, Oil and Grease, TDS, and Ammonia (as N). Testing shall be conducted in January 2018, April 2019, July 2020 and October 2021, to represent seasonal changes. 10 of 18 UPPER SIOUX COMMUNITY Inspection Date: 06/29/2022 Unit: Interview DM1-OB-005 Area: Self Monitoring pH/DO field sample collection: data sheets do not include sample collection and analysis times for Ph and DO. Unit: Physical inspection ofWWTF DM1-OB-015 Citations: 40 CFR Part 136 Area: Influent/Effluent Auto Samplers Auto sampler preservation (cooling): I observed that both effluent and influent auto samplers lacked thermometers to confirm samples are cooled and preserved. Citations: Permit Part II.3.C and 40 CFR Part 136. SECTION VI - CLOSING CONFERENCE AND FOLLOW UP Closing Conference I held a closing conference with Facility personnel at 02:30 PM (CT) on 06/29/2022. During the closing conference, I discussed the observations and preliminary Areas of Concern identified during the inspection, and highlighted the concern regarding chronic permit effluent limit exceedances. Observations and preliminary Areas of Concern have not yet been evaluated for a formal compliance determination. Before concluding, I asked the Director if he had any questions. He did not. Follow Up Unit: Interview Area: Other Non-DMR Reports DM1-OB-002 The Facility representatives were unable to confirm if the O&M Plan requirements under the Permit were met. According to the Permit Part I.B.3, the permittee shall implement an Operation & Maintenance Plan and Asset Management Plan, and submit an annual status report by January 31 of each year (Part I.B.3.b). The Director said he would discuss with the contract engineer and provide an update after the inspection. SECTION VII - LIST OF APPENDICES 1. Photo Log 2. Inspection Documents 11 of 18 UPPER SIOUX COMMUNITY Inspection Date: APPENDIX 1: PHOTOLOG 06/29/2022 12 of 18 UPPER SIOUX COMMUNITY Inspection Date: Primary screw screen UPSC0001.JPG 06/29/2022 12:42 PM (CT) Dean Maraldo Physical inspection of WWTF - Headworks No CBI No PII Influent Parshall flume and flow meter UPSC0002.JPG 06/29/2022 12:44 PM (CT) Dean Maraldo Physical inspection of WWTF - Headworks No CBI No PII Backup bar screen UPSC0003.JPG 06/29/2022 12:44 PM (CT) Dean Maraldo Physical inspection of WWTF - Headworks No CBI No PII 13 of 18 06/29/2022 UPPER SIOUX COMMUNITY Inspection Date: View into aeration basin through hatch. UPSC0004.JPG 06/29/2022 12:51 PM (CT) Dean Maraldo Physical inspection of WWTF/Aeration Tanks No CBI No PII Covered aeration and equalization tanks. UPSC0005.JPG 06/29/2022 12:52 PM (CT) Dean Maraldo Physical inspection of WWTF/Aeration Tanks No CBI No PII Two covered equalization tanks are in background and two covered aeration tanks in foreground. Final covered clarifiers (2) and effluent tank UPSC0006.JPG 06/29/2022 1:04 PM (CT) Dean Maraldo Physical inspection of WWTF/Clarifiers No CBI No PII 14 of 18 06/29/2022 UPPER SIOUX COMMUNITY Inspection Date: Final Outfall 001 to the Minnesota River UPSC0007.JPG 06/29/2022 1:08 PM (CT) Dean Maraldo Physical inspection of WWTF/Final Outfall 001 No CBI No PII River level too high to observe actual outfall structure and discharge characteristics. Facility backup generator UPSC0008.JPG 06/29/2022 1:12PM (CT) Dean Maraldo Physical inspection of WWTF/Backup Generator No CBI No PII SCADA system UPSC0009.JPG 06/29/2022 1:13 PM (CT) Dean Maraldo Physical inspection of WWTF/SCADA System No CBI No PII Image of SCADA control screen. 15 of 18 06/29/2022 UPPER SIOUX COMMUNITY Inspection Date: Effluent Auto Sampler (Hach) UPSC0010.JPG 06/29/2022 1:16 PM (CT) Dean Maraldo Physical inspection of WWTF/Influent/Effluent Auto Samplers No CBI No PII Note lack of thermometer. Influent Auto Sampler (Hach) UPSC0011.JPG 06/29/2022 1:21 PM (CT) Dean Maraldo Physical inspection of WWTF/Influent/Effluent Auto Samplers No CBI No PII Note lack of thermometer MBR system UPSC0012.JPG 06/29/2022 1:23 PM (CT) Dean Maraldo Physical inspection of WWTF/Membrane bioreactor No CBI No PII 16 of 18 06/29/2022 UPPER SIOUX COMMUNITY Inspection Date: UV treatment system UPSC0013.JPG 06/29/2022 1:25 PM (CT) Dean Maraldo Physical inspection of WWTF/Ultraviolet (UV) Treatment System No CBI No PII Two UV bulb banks, alternated annually. Effluent from currently operational UV treatment bank UPSC0014.JPG 06/29/2022 1:26 PM (CT) Dean Maraldo Physical inspection of WWTF/Ultraviolet (UV) Treatment System No CBI No PII MBR system cleaning solution tanks UPSC0015.JPG 06/29/2022 1:28 PM (CT) Dean Maraldo Physical inspection of WWTF/Membrane bioreactor No CBI No PII Azone -chlorine tank in foreground and Citric tank in background. 17 of 18 06/29/2022 UPPER SIOUX COMMUNITY Inspection Date: Ferric Chloride Tank UPSC0016.JPG 06/29/2022 1:29 PM (CT) Dean Maraldo Physical inspection of WWTF/Ferric Tank No CBI No PII 06/29/2022 APPENDIX 2: INSPECTION DOCUMENTS (attached below) Document Type Violation History Lab Bench Sheets Document Name Upper Sioux ELVs_20220627.pdf WWTP logs.pdf Contains CBI No No Contains PII No No Date Received NA - provided by EPA lead inspector 06/29/2022 Laboratory Analysis Reports Flow Meter Logs Additional MonitoringLab No Reports.pdf WWTP flow log_June2022.pdf No No 06/29/2022 No 06/30/2022 18 of 18 Effluent Limit Exceedances Report MN0075001: UPPER SIOUX WWTF, GRANITE FALLS, MN 56241 Monitoring Period Date Range: 07/01/2017 to 04/30/2022 Outfall 001 Exceedance Details Monitoring Period Date 2/28/2018 3/31/2019 5/31/2019 3/31/2020 5/31/2020 5/31/2020 5/31/2020 5/31/2020 6/30/2020 7/31/2020 7/31/2020 12/31/2020 1/31/2021 1/31/2021 1/31/2021 1/31/2021 1/31/2021 2/28/2021 4/30/2021 4/30/2021 4/30/2021 4/30/2021 5/31/2021 5/31/2021 5/31/2021 7/31/2021 1/31/2022 3/31/2022 3/31/2022 4/30/2022 Parameter Description BOD, carbonaceous, 05 day, 20 C Solids, total suspended BOD, carbonaceous, 05 day, 20 C BOD, carbonaceous, 05 day, 20 C Solids, total suspended Solids, total suspended Phosphorus, total (as P) E. coli Solids, total suspended Solids, total suspended Solids, total suspended BOD, carbonaceous, 05 day, 20 C Solids, total suspended Solids, total suspended Solids, total suspended Phosphorus, total (as P) BOD, carbonaceous, 05 day, 20 C Solids, total suspended Oxygen, dissolved (DO) Solids, total suspended Solids, total suspended Phosphorus, total (as P) Solids, total suspended Solids, total suspended Phosphorus, total (as P) Solids, total suspended Solids, total suspended Solids, total suspended BOD, carbonaceous, 05 day, 20 C Solids, total suspended Limit Type DAILY MX DAILY MX DAILY MX DAILY MX DAILY MX 30DA AVG DAILY MX DAILY MX DAILY MX 30DA AVG DAILY MX DAILY MX DAILY MX DAILY MX 30DA AVG 30DA AVG DAILY MX DAILY MX MINIMUM 30DA AVG DAILY MX 30DA AVG DAILY MX 30DA AVG DAILY MX DAILY MX DAILY MX DAILY MX DAILY MX DAILY MX DMR Value 34 21 23 32 42 14.5 0.225 260 35 10.71 29 21 215 32.53 25.5 1.19 25 21 4.03 20.41 120 0.57 27 10.92 0.54 30 27 38 22 35 DMR Value Unit mg/L mg/L mg/L mg/L mg/L mg/L kg/d #/100mL mg/L mg/L mg/L mg/L mg/L kg/d mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L kg/d mg/L mg/L mg/L mg/L mg/L Limit Value 20 20 20 20 20 10 0.2 235 20 10 20 20 20 8.2 10 0.5 20 20 7 10 20 0.5 20 10 0.2 20 20 20 20 20 Limit Value Qualifier <= <= <= <= <= <= <= <= <= <= <= <= <= <= <= <= <= <= >= <= <= <= <= <= <= <= <= <= <= <= % Exceedance 70 5 15 60 110 45 13 11 75 7 45 5 975 297 155 138 25 5 42 104 500 14 35 9 170 50 35 90 10 75 Appendix 2, page 1 Appendix 2, page 2 Appendix 2, page 3 Appendix 2, page 4 Appendix 2, page 5 Appendix 2, page 6 Appendix 2, page 7 Appendix 2, page 8 Appendix 2, page 9 Appendix 2, page 10 Appendix 2, page 11