Document em5paGOXZKzbLvdr140jwM37m

REGION 5 Enforcement and Compliance Assurance Division Compliance Evaluation Inspection Report Inspection Date(s): Time: Media: Statute(s)/Program(s): Type of inspection: Access: 08/02/2022 - 08/03/2022 Announced: Yes Entry: 01:01 PM (ET) Exit: 09:30 AM (ET) Water Clean Water Act, NPDES, WWTF CEI - Compliance Evaluation Inspection Granted Permittee Name: Facility or Site Name: Facility/Site Physical Address: (City, state, zip code) County/Parish: Facility GPS Coordinates: GUN LAKE TRIBAL GAMING AUTHORITY WASTEWATER TREATMENT FACILITY GUN LAKE TRIBAL GAMING AUTHORITY WASTEWATER TREATMENT FACILITY 1123 129TH AVENUE WAYLAND, MI 49348 ALLEGAN 42.63042, -85.65445 Facility/Site Identifier: Permit Number: 110039145430 MI0058661 Persons Participating in Inspection: Title Name Lead Inspector Dean Maraldo Inspector Jake Berger Wastewater/Water Manager Facilities Manager Don Row James Lumbard Phone (312) 353-2098 (312) 353-8024 (269) 792-7734 (269) 792-7697 Environmental Director Operator Liz Binoniemi-Smith (269) 397-1780 x1248 Randy Krause Email Present at Opening Conf. Maraldo.Dean@e Yes pa.gov Berger.Jake@epa. Yes gov Donald.Row@gu Yes nlakecasino.com james.lombard@ Yes gunlakecasino.co m Elizabeth.Binonie Yes mi-Smith@gltnsn.gov No Present at Closing Conf. Yes Yes Yes Yes Yes Yes 1 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): 08/02/2022 - 08/03/2022 Lead Inspector: Dean Maraldo Supervisor Review: Ryan Bahr [Signature] REGION 5 [Signature] REGION 5 DINO MARALDO Digitally signed by DINO MARALDO Date: 2022.08.05 17:01:42 -05'00' Maraldo.Dean@epa.gov (312) 353-2098 Digitally signed by Bahr, Bahr, Ryan Ryan Date: 2022.08.05 17:07:22 -05'00' bahr.ryan@epa.gov SECTION I - INTRODUCTION Site Entry and Inspection Objectives I, Dean Maraldo, arrived at the Gun Lake Water Treatment building at 1:01 PM on Tuesday, August 2, 2022, for an announced inspection. I was joined by U.S. EPA inspector Jake Berger. We met Gun Lake Tribal Gaming Authority ("Authority") representatives Don Row (Wastewater/Water Manager) and James Lumbard (Facilities Manager). We were joined by Liz Binoniemi-Smith, the Gun Lake Tribe Environmental Director. We presented our EPA inspector credentials to Mr. Row 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. We conducted the opening conference and interview at the Gun Lake Water Treatment building, instead of the wastewater treatment plant, because the building had a large room with a table. This report is based on information supplied by Authority representatives, observations made by the REGION 5 inspectors, and records and reports maintained by the Authority 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 and information supplied by Authority representatives 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 Authority representatives during or subsequent to the on-site Inspection. In addition, information gathered prior to or subsequent to the Inspection from a review of U.S. EPA and public records may be included in this report. Facility/Site Description During the opening conference, I asked Authority representatives to confirm the description of the Gun Lake Tribal Gaming Authority Wastewater Treatment Facility ("Facility") included in the latest NPDES Permit ("Permit"), issued on January 29, 2020. Mr. Row confirmed the following description: The Gun Lake Tribal Gaming Authority operates a 0.20 mgd (with plans to ultimately expand to 0.350 mgd) wastewater treatment facility to serve a tribal community in Allegan County, Michigan. Recent average daily flow is 0.10 MGD. The plant was built in 2010. The facility consists of an influent equalization basin with three influent pumps followed by flow metering and fine screening. Following screening, the wastewater enters the activated sludge process at the anoxic basin which provides additional flow equalization, as needed. Chemical addition of alum for phosphorus removal and 2 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): 08/02/2022 - 08/03/2022 sodium hydroxide for pH adjustment occurs in the anoxic basin. Activated sludge is pumped from the anoxic basin to one or both pre-aeration basins which flow to one of two membrane bioreactors (MBR) for liquid/solids separation. One side of the MBR has a torn membrane. Final effluent is pumped to an ultra-violet light disinfection system (stainless steel, two bank system) and post aeration occurs prior to discharge to Outfall 001 (approximate coordinates N42.635684, W85.652941), to discharge to Buskirk Creek. Waste sludge is land applied every two years to a nearby farm. Mr. Row said they operate one lift station at the casino. Wastewater from the tribal campus flows to the Facility via gravity flow. I asked about ownership of the casino and Facility. Mr. Row said both the casino and Facility are owned by the Tribe (Match-E-Be-Nash-She-Wish Tribe of Pottawatomi Indians). Facility/Site Information Information provided by Don Row. Responsible official WWTP Design Capacity & Average Daily Flow WWTP Approx. # of residents served Don Row Design Capacity 0.20 MGD; Average Daily Flow 0.10 MGD NA. Facility serves casino and tribal government campus Outfalls Operation schedule Do you use in-house or contract out for laboratory analyses? 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? Any CBI concerns? Outfall 001 to Buskirk Creek Seven days a week, 7am-3pm; M-Tues, 2 operators; WF, three operators; weekends, one operator. In-house for TSS, VSS, DO and pH; lab for all others MBR tear Yes, planned expansion to double capacity. Plan not fully developed, but likely to include new MBR system No 3 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): Inspection Units Unit Flow Monitoring Operations and Maintenance Self-Monitoring Violation History Records Review Headworks/Primary Treatment Secondary Treatment UV Treatment Final Effluent Trough and Outfall 001 Lift Station Wastewater Plant Backup Generator 08/02/2022 - 08/03/2022 Description Interview Physical WWTP Inspection SECTION II - OBSERVATIONS Observations may not be in sequential order. Unit: Interview/Flow Monitoring Observation #: DM1-OB-001 Contains CBI: No Date: 08/02/2022 The facility measures influent and effluent flow using magnetic flow meters. According to Mr. Row, the meters are calibrated annually and he presented a receipt showing the last calibration date in August 2021. The influent flow meter measures flow into the primary EQ tank, and the effluent flow meter measures flow after UV treatment. Unit: Interview/Operations and Maintenance Observation #: DM1-OB-002 Contains CBI: No Date: 08/02/2022 I asked how the plant was running in general. Mr. Row said that other than the MBR issues, they have had some recent problems with blowers and EQ tank pumps. Both issues have been resolved and they now keep spare pump parts on hand to deal with issues if they arise. The Facility uses an electronic O&M program (Hach) that alerts staff of weekly O&M and preventative maintenance tasks. Mr. Row said the staff conduct mixed liquor process testing twice a week, and keep an eye on hydrogen sulfide issues with a monitoring device (hydrogen sulfide is a sign of treatment issues). They also monitor DO in the pre-air tanks. Bench sheets are used for daily operations notes. The facility also maintains an inventory of spare parts. I asked if the facility experienced any bypasses or SSOs within the last few years. Mr. Row said they have never had a bypass, and no SSOs. 4 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): 08/02/2022 - 08/03/2022 Facility alarms: Mr. Row said they use a SCADA-based alarm system (Win 911). The system provides a phone call, text, or email to Don Row, James Lumbard, and Randy Krause. I asked about emergency procedures. Mr. Row said they have written procedures for emergencies including floods and power outages. The plan was recently updated. The facility has a backup diesel generator which is automatically tested every Thursday. The lift station also has backup power. Facility staff also receive annual OSHA 8-hour safety refresher training. Unit: Interview/Self-Monitoring Observation #: DM1-OB-003 Contains CBI: No Date: 08/02/2022 Mr. Row confirmed that effluent composite samples are pulled from a location prior to UV disinfection and effluent grab samples are collected after UV disinfection. This is consistent with Permit requirements (Part I.A.b). Composite samplers are set up for time-proportioned samples, consistent with Permit Part II.E.6.a. Mr. Row described the grab sample processes for E.coli, DO, and pH. E.coli samples are collected directly into lab-provided and pre-preserved bottles. DO is collected and analyzed immediately with a YSI probe, which is calibrated in the laboratory before each use. Calibration records are kept in the laboratory. pH is analyzed in the laboratory within 15 minutes of collection. Influent and effluent autosamplers are refrigerated. pH, TSS, and VSS are analyzed in the Facility lab. All other parameters analyzed at Prein & Newhof Laboratories in Grand Rapids. Unit: Interview/Violation History Observation #: DM1-OB-004 Contains CBI: No Date: 08/02/2022 I asked the Facility representatives about the recent self-reported phosphorus effluent limit exceedance in May 2022. Mr. Row said he believes the May 2022 phosphorus effluent limit violation and more recent phosphorus effluent limit exceedances in June and July 2022 were attributed to membrane tears in the MBR treatment unit. He added that they likely contributed to E.coli effluent limit exceedances in June and July as well. Liz Binoniemi-Smith asked why EPA's ECHO database is showing consistent reported violations for the Facility. I said it was likely due to missing permit status or progress reports. Mr. Row added that he should be up to date on all reports, and reports due on January 31, 2022 (O&M Plan report and Mercury Minimization Plan Status report), were submitted on time. I said I would look into the issue and get back to them with an update. Mr. Row also confirmed all Additional Monitoring samples (Permit Part I.C.7) are up to date. Unit: Physical WWTF Inspection/Headworks/Primary Treatment Observation #: DM1-OB-005 Contains CBI: No Date: 08/03/2022 We arrived at the Facility at 8:06 AM on August 3, 2022, and met Authority representatives Don Row, Liz Binoniemi-Smith, James Lumbard, and Randy Krause. Before starting the physical Facility inspection, I asked if the Facility receives any septage waste. Mr. Row said they do not. I also asked if there were any confidential 5 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): 08/02/2022 - 08/03/2022 business information ("CBI") concerns with regard to the taking of photographs of the Facility. Mr. Row said there were no CBI concerns. We began the physical inspection at the Equalization Tank ("EQ Tank") area. I observed the influent sampling house and the ISCO Influent Auto Sampler. The sampler was refrigerated and had a thermometer (see Photo Log image GUNL0079). However, Mr. Row said they do not maintain a temperature log. The EQ basin is covered under a concrete slab and could not be easily observed (see Photo Log image GUNL0080). There is a grinder in the EQ basin, prior to the Fine Screen. Next, we walked to the fine screen room, where the twin fine screen units are located (see Photo Log image GUNL0081). One of the twin screen units was off line for servicing. Mr. Row said that they only run one fine screen unit under normal operating conditions. Photo(s) 1. GUNL0079.JPG 2. GUNL0080.JPG 3. GUNL0081.JPG Unit: Physical WWTF Inspection/Secondary Treatment Observation #: DM1-OB-006 Contains CBI: No Date: 08/03/2022 I observed the anoxic tank, which is partially covered by the fine screen room (see Photo Log image GUNL0082), and the two aeration tanks (see Photo Log image GUNL0083). Mr. Row pointed out the various dedicated DO meters used to monitor conditions in the aeration tanks. After the aeration tanks, effluent flows to the MBR system, consisting of two MBR cassette systems, each with twin cassettes. Mr. Row mentioned that there are tears in both of the cassettes in one of the MBR cassette systems (see Photo Log image GUNL0084). As a result, one of the MBR cassette systems is out of service due to the tears. He confirmed that both of the MBR cassette systems are used under normal operating conditions. I asked when the torn MBR was first noticed. Mr. Row said sometime in June 2022, when they started seeing higher turbidity and phosphorus concentrations. We walked on to the concrete pad above the MBR system and I captured a photograph of the area above the MBRs (see Photo Log image GUNL0085). Next, we walked into the Plant Building and observed the three MBR system pumps (see Photo Log image GUNL0086) and the two effluent magnetic flow meters (see Photo Log image GUNL0087). Two of the pumps send flow to dedicated effluent flow meters, and the third pump can used in place of the two other pumps, as needed. Total flow from the two effluent magnetic flow meters are measured every day to provide the Facility's daily total effluent flow. Effluent from the MBR system is pumped to the UV treatment system. Photo(s) 1. GUNL0082.JPG 2. GUNL0083.JPG 3. GUNL0084.JPG 4. GUNL0085.JPG 5. GUNL0086.JPG 6. GUNL0087.JPG 6 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): 08/02/2022 - 08/03/2022 Unit: Physical WWTF Inspection/UV Treatment Observation #: DM1-OB-007 Contains CBI: No Date: 08/03/2022 Final effluent is pumped to the stainless steel, two bank, ultra-violet light ("UV") disinfection system (see Photo Log image GUNL0088). There is a turbidity meter prior to the UV system. The final effluent auto sampler is next to the UV system. The Hach Sigma 1600 auto sampler is refrigerated and I noted a thermometer in the sample bin (see Photo Log image GUNL0089). The effluent auto sampler is set up for time-based composite sampling. Photo(s) 1. GUNL0088.JPG 2. GUNL0089.JPG Unit: Physical WWTF Inspection/Final Effluent Trough and Outfall 001 Observation #: DM1-OB-008 Contains CBI: No Date: 08/03/2022 After UV treatment, effluent flows to final Outfall 001 via an effluent trough. We walked out of the Plant Building on top of a metal grated walkway that covered the flowing effluent trough (see Photo Log image GUNL0090). The effluent in the trough is also aerated prior to discharge to Outfall 001. I observed the discharge from Outfall 001 into Buskirk Creek (see Photo Log image GUNL0091). The discharge and receiving water appeared clear. I asked about return flows from the sludge process. Mr. Row said all water from the sludge dewatering process returns to the EQ basin, after the influent flow meter. From here we took a short drive to the casino to observe the lift station. Photo(s) 1. GUNL0090.JPG 2. GUNL0091.JPG Unit: Physical WWTF Inspection/Lift Station Observation #: DM1-OB-09 Contains CBI: No Date: 08/03/2022 I observed the Facility's only lift station which, according to James Lumbard, helps to convey flow from the casino buffet area, cafeteria, dish rooms, and administrative areas. Mr. Row said all other flows are conveyed to the wastewater treatment plant via gravity flow. The lift station includes a grinder (Muffin Monster) and two submersible pumps. The grinder controls and manhole are shown in Photo Log image GUNL0092. I captured an image looking down into the lift station wet well (Photo Log image GUNL0093). 7 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): Photo(s) 1. GUNL0092.JPG 2. GUNL0093.JPG 08/02/2022 - 08/03/2022 Unit: Physical WWTF Inspection/Wastewater Plant Backup Generator Observation #: DM1-OB-010 Contains CBI: No Date: 08/03/2022 The last stop on the physical inspection of the wastewater plant was the backup generator (see Photo Log image GUNL0094). The diesel generator is automatically tested every Thursday. We concluded the physical inspection of the facility at 9:08 AM on August 3, 2022. Photo(s) 1. GUNL0094.JPG SECTION III - RECORDS REVIEW Records may not be in sequential order. Record: DMR Reports Ref #: DM1-RR-001 Reviewed By: Dean Maraldo and Jake Berger AOC: Yes Reviewed Date: 08/02/2022 I requested copies of DMRs for May and June 2022, and sampling results for phosphorus, ammonia, BOD, and E.coli for July 2022. Mr. Row provided copies of the requested DMRs and sampling results for the first three weeks of July for phosphorus, ammonia, BOD, and E.coli. I also asked for monthly operating reports ("MORs")for May and June 2022. Mr. Row provided binders with MORs for 2022. We reviewed the requested DMRs and MORs (attached) on the afternoon of August 2, 2022. For the months of review, the Facility conducted all required monitoring pursuant to the Permit. I noted a number of permit effluent limit exceedances, including: May 2022: phosphorus monthly concentration limit exceedance (permit limit 0.1 mg/l; reported value of 0.15 mg/l). June 2022: phosphorus monthly concentration limit exceedance (permit limit 0.1 mg/l; reported value of 0.31 mg/l). E.coli daily limit concentration exceedance (permit limit 410 E.coli/100ml; reported value of 470 E.coli/100ml). July 2022: E.coli daily limit concentration exceedance (permit limit 410 E.coli/100ml; reported value of 500 E.coli/100ml on July 6, 2022; and 430 E.coli/100ml on July 20, 2022). Without the results of the last weekly phosphorus sample, a monthly average for phosphorus concentration for July could not be calculated. However, phosphorus concentrations exceeded the monthly limit of 0.1 mg/l each of the first three weeks of July, including on July 5 (0.25 mg/l), July 12 (0.194 mg/l), and July 19 (0.224 mg/l). 8 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): 08/02/2022 - 08/03/2022 During the records review, I also noted an incomplete sampling bench sheet for May 27, 2022 (attached). The sheet was missing sample and analysis time and collector initials. Mr. Row said that he thinks that the E.coli effluent limit exceedances may be attributed to sampling error. He said that he recently resampled effluent after one of his operators collected a effluent sample with elevated E.coli. His sample was "non-detect". With the operations shift coming to an end at 3pm, we concluded the inspection for the day and agreed to reconvene at the wastewater plant at 8 am the next morning (8/3/2022) to complete the physical inspection of the facility and the close out conference. Document(s) 1. MI0058661_Gun Lake_Facility Records.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: Records Review DM1-RR-001 Area: Effluent Limit Exceedances I noted a number of permit effluent limit exceedances, including: May 2022: phosphorus monthly concentration limit exceedance (permit limit 0.1 mg/l; reported value of 0.15 mg/l). June 2022: phosphorus monthly concentration limit exceedance (permit limit 0.1 mg/l; reported value of 0.31 mg/l). E.coli daily limit concentration exceedance (permit limit 410 E.coli/100ml; reported value of 470 E.coli/100ml). July 2022: E.coli daily limit concentration exceedance (permit limit 410 E.coli/100ml; reported value of 500 E.coli/100ml on July 6, 2022; and 430 E.coli/100ml on July 20, 2022). Phosphorus concentrations exceeded the monthly limit of 0.1 mg/l each of the first three weeks of July, including on July 5 (0.25 mg/l), July 12 (0.194 mg/l), and July 19 (0.224 mg/l). 9 of 32 Citations: NPDES Permit Part I.A. (Final Effluent Limitations and Monitoring Requirements) GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): 08/02/2022 - 08/03/2022 During the records review, I also noted an incomplete sampling bench sheet for Citations: May 27, 2022 (attached). The sheet was missing sample and analysis time and NPDES Permit Part II.C.5. collector initials. (Records Contents) Unit: Interview DM1-OB-004 Area: Violation History Mr. Row said he believes the May 2022 phosphorus effluent limit violation and Citations: more recent phosphorus effluent limit exceedances in June and July 2022 were NPDES Permit Part I.C.3 attributed to membrane tears in the MBR treatment unit. He added that they (The permittee shall at all times likely exceeded E.coli effluent limits in June and July as well, possibly attributed properly operate and maintain all to the MBR tears. facilities and systems of conveyance, treatment and control) During the physical inspection of the MBRs, Mr. Row mentioned that there are tears in both of the cassettes in one of the MBR cassette systems. As a result, one of the MBR cassette systems is out of service. He confirmed that both MBR cassette systems are used under normal operating conditions. Unit: Physical WWTF Inspection DM1-OB-005 Area: Headworks/Primary Treatment I observed the influent sampling house and the ISCO Influent Auto Sampler. The sampler was refrigerated and had a thermometer (see PhotoLog image GUNL0079). However, Mr. Row said they do not maintain a temperature log for the influent and effluent auto samplers. Citations: 40 CFR Part 136 NPDES Permit Part II.C.3 (Monitoring Procedures) SECTION VI - CLOSING CONFERENCE AND FOLLOW UP Closing Conference We conducted the closing conference in the parking lot of the wastewater treatment plant. I reviewed the preliminary areas of concerns, including the recent effluent limit exceedances for E.coli and phosphorus, and the tear in one of the MBR cassettes. I also mentioned the importance of correctly filling out daily bench sheets, including date and time of sample collection and analysis. I provided some guidance on conducting quality control testing for E.coli sampling, including collection of duplicate samples to rule out sampler error or potential cross contamination issues. Observations and Areas of Concern have not yet been evaluated for a formal compliance determination. I provided an estimated timeframe for completion of the inspection report and asked if there were any questions. Liz Binoniemi-Smith asked if she would receive a copy of the report. I said I would make sure to include her in the distribution list for the final report. 10 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): 08/02/2022 - 08/03/2022 Follow Up The following item was requested by the Tribe during the inspection. Unit: Interview DM1-OB-004 Area: Violation History Liz Binoniemi-Smith asked why EPA's ECHO database is showing consistent reporting violations for the Facility. I said it was likely due to missing permit status or progress reports. Mr. Row added that he should be up to date on all reports, and reports due on January 31, 2022 (O&M Plan report and Mercury Minimization Plan Status report), were submitted on time. I said I would look into the issue and get back to them with an update after the inspection. Communication Log No additional information received by REGION 5 after exiting the Facility on 08/03/2022. SECTION VII - LIST OF APPENDICES 1. Photo Log 2. Document Log 3. Records received during inspection (DMR Reports, bench sheets, laboratory reports) 11 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): APPENDIX 1: PHOTOLOG All photos taken by Dean Maraldo, Inspector, U.S. EPA Camera: Ricoh WG-4 08/02/2022 - 08/03/2022 Influent Auto Sampler GUNL0079.JPG 08/03/2022 08:23 AM (ET) Dean Maraldo Physical WWTP Inspection/Headworks/Primary Treatment No CBI No PII Note the thermometer inside the auto sampler. EQ Basin (under concrete slab) GUNL0080.JPG 08/03/2022 08:24 AM (ET) Dean Maraldo Physical WWTP Inspection/Headworks/Primary Treatment No CBI No PII 12 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): Twin Fine Screen Units GUNL0081.JPG 08/03/2022 08:26 AM (ET) Dean Maraldo Physical WWTP Inspection/Headworks/Primary Treatment No CBI No PII The unit on the right of the photo was off line at the time of inspection. Anoxic Tank GUNL0082.JPG 08/03/2022 08:28 AM (ET) Dean Maraldo Physical WWTP Inspection/Secondary Treatment No CBI No PII Aeration Basins (2) GUNL0083.JPG 08/03/2022 08:28 AM (ET) Dean Maraldo Physical WWTP Inspection/Secondary Treatment No CBI No PII 13 of 32 08/02/2022 - 08/03/2022 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): MBR Cassette GUNL0084.JPG 08/03/2022 08:31 AM (ET) Dean Maraldo Physical WWTP Inspection/Secondary Treatment No CBI No PII Note torn or split membranes on the left side of cassette. View of the covered MBR system GUNL0085.JPG 08/03/2022 08:33 AM (ET) Dean Maraldo Physical WWTP Inspection/Secondary Treatment No CBI No PII MBR Pumps (3) GUNL0086.JPG 08/03/2022 08:37 AM (ET) Dean Maraldo Physical WWTP Inspection/Secondary Treatment No CBI No PII 08/02/2022 - 08/03/2022 14 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): Effluent Magnetic Flow Meter GUNL0087.JPG 08/03/2022 08:40 AM (ET) Dean Maraldo Physical WWTP Inspection/Secondary Treatment No CBI No PII One of two magnetic flow meters used to provide the facility's total daily effluent flow. UV Treatment System GUNL0088.JPG 08/03/2022 08:41 AM (ET) Dean Maraldo Physical WWTP Inspection/UV Treatment No CBI No PII Effluent Autosampler (Hach Sigma 1600) GUNL0089.JPG 08/03/2022 08:45 AM (ET) Dean Maraldo Physical WWTP Inspection/UV Treatment No CBI No PII Note the thermometer inside the auto sampler. 15 of 32 08/02/2022 - 08/03/2022 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): Effluent trough to Outfall 001 GUNL0090.JPG 08/03/2022 08:47 AM (ET) Dean Maraldo Physical WWTP Inspection/Final Effluent Trough and Outfall 001 No CBI No PII Trough conveys effluent from UV treatment to final outfall 001. The trough is covered by a metal grate. Final Outfall 001 GUNL0091.JPG 08/03/2022 08:49 AM (ET) Dean Maraldo Physical WWTP Inspection/Final Effluent Trough and Outfall 001 No CBI No PII Effluent discharge and Buskirk Creek appeared clear. Lift Station Grinder GUNL0092.JPG 08/03/2022 09:00 AM (ET) Dean Maraldo Physical WWTP Inspection/Lift Station No CBI No PII The lift station includes a grinder (Muffin Monster). The grinder controls and manhole are captured in this image. 16 of 32 08/02/2022 - 08/03/2022 GUN LAKE TRIBAL GAMING AUTHORITY WWTF Inspection Date(s): View inside Lift Station wet well GUNL0093.JPG 08/03/2022 09:01 AM (ET) Dean Maraldo Physical WWTP Inspection/Lift Station No CBI No PII 08/02/2022 - 08/03/2022 Wastewater Treatment Plant Backup Generator GUNL0094.JPG 08/03/2022 09:07 AM (ET) Dean Maraldo Physical WWTP Inspection/Wastewater Plant Backup Generator No CBI No PII Diesel powered generator. APPENDIX 2: DOCUMENT LOG (documents included in Appendix 3) Document Type DMR Reports, bench sheets, laboratory reports Document Name Contains CBI MI0058661_GunLake_Facility No Records.pdf Contains PII No Pages 14 Date Received 08/03/2022 17 of 32 Appendix 3: Records received during inspection (DMR Reports, bench sheets, laboratory reports) GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 18 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 19 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 20 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 21 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 22 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 23 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 24 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 25 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 26 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 27 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 28 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 29 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 30 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 31 of 32 GUN LAKE TRIBAL GAMING AUTHORITY WWTF INSPECTION REPORT APPENDIX 3 REPORT PAGE 32 of 32