Document KzG40KjLm6jwE6O5a0LjeqG42

EPA REGION 5 Enforcement and Compliance Assurance Division INSPECTION REPORT Inspection Entry Date/Time Inspection Exit Date/Time Weather Media Statute(s)/Program(s) Type of Inspection 09/06/2023 12:22 PM (CT) Announced: Yes 09/06/2023 03:45 PM (CT) Access: Granted Cloudy/rain Water Clean Water Act, NPDES, WWTP Compliance Evaluation Inspection (CEI) Permittee Name Facility Names Facility Physical Address City, State, Zip Code County Facility GPS Coordinates Mailing Address (If different) City, State, Zip Code Forest County Potawatomi Community 1) Crandon Recirculating Sand Filter/Stone Lake WWTP; and 2) Carter Wastewater Treatment Facility 1) Hwy 8 East; 2) Hwy 32 S 1) Crandon, WI; 2) Carter, WI Forest County 1) 45.56948, -88.85437499; 2) 45.40145833, -88.62622499 Forest County Potawatomi Community P.O. Box 340 5416 Everybody's Road Crandon, WI 54520 FRS ID 1) 110010884221; 2) 110070628400 Permit Number(s) (If Applicable) 1) WI0058424; 2) WI0058432 SIC and/or NAICS 4952 Regulatory Representatives Participating in Inspection: Title Name Inspector Ray Cullen Organization EPA REGION 5 Lead Inspector: Dean Maraldo Supervisor Review: Ryan Bahr [Signature] DINO MARALDO Digitally signed by DINO MARALDO Date: 2023.09.22 09:01:50 -05'00' EPA REGION 5 maraldo.dean@epa.gov (312) 353-2098 [Signature] Digitally signed by RYAN RYAN BAHR Date: 2023.09.27 BAHR 18:11:30 -05'00' EPA REGION 5 bahr.ryan@epa.gov 1 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 SECTION I - INTRODUCTION Site Entry and Inspection Objectives I, EPA Region 5 Lead Inspector, Dean Maraldo, arrived at the Forest County Potawatomi Community ("FCPC") Utilities office near the Crandon Recirculating Sand Filter/Stone Lake Wastewater Treatment Plant ("Stone Lake WWTP"), located at Hwy 8 East, Crandon, WI 54520, at 12:22 PM (CT) on 09/06/2023 for an announced inspection. I, along with EPA Region 5 inspector Ray Cullen, presented our inspector credentials to Nate Guldan and informed them that this was a EPA Region 5 inspection to determine compliance as authorized by Clean Water Act (CWA) Section 308 and implementing regulations. This report is based on information supplied by representatives of the Forest County Potawatomi Community, owners and operators of the Stone Lake WWTP and Carter Wastewater Treatment Facility ("Carter WWTF"), direct observations made by EPA Region 5 inspectors, records and reports maintained by the permittee and other information including: photographs taken by EPA Region 5 inspectors, physical evidence collected by the EPA Region 5 inspectors, verbal or written statements made by information supplied by Stone Lake WWTP and Carter WWTF representatives during or subsequent to the on-site inspections, and materials, processes, data, photographs, or documents shown, demonstrated, or submitted to the EPA Region 5 inspectors by Stone Lake WWTP and Carter WWTF representatives during or subsequent to the on-site inspections. In addition, information gathered prior to or subsequent to the inspections from a review of EPA and/or public records may be included in this report. Attendees Organization Attendee Name EPA Region 5 EPA Region 5 FCPC Dean Maraldo Ray Cullen Nate Guldan FCPC FCPC Indian Health Service Aaron Loomis Bruce Johnson Shane Hoffman FCPC Jennifer Spencer Title Lead Inspector Present in Opening Conf. Yes Inspector Yes Public Works Division Yes Administrator Attorney Yes Utility Manager Yes Wisconsin Tribal Utility Yes Consultant Water and Sewer Yes Manager Present in Closing Conf. Yes Yes Yes Yes Yes Yes Yes Facility/Site Description I began by reviewing the facility description provided in the current permits (excerpts below) for Stone Lake WWTP and Carter WWTF, and the Facility representatives confirmed the information as described below. Changes to the permit descriptions were made by Bruce Johnson (Utility Manager) and indicated in bold below. Permit Fact Sheet Facility Description for the Carter WWTF: The applicant recently constructed a new wastewater treatment system as described below to replace its existing lagoon facility. The system is designed to treat 0.06 mgd of domestic wastewater. The discharge uses the same outfall as the replaced lagoon facility and is continuous to a wetland from Outfall 001 on the Reservation. The facility was placed into operation in June 2019. 2 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 The FCPC Carter Wastewater Treatment Facility (WWTF) provides wastewater treatment services to the local community and the Casino. Lift Station #1 transfers flows from the sanitary sewer system to the WWTF via 8-inch sanitary force main to the WWTF Headworks where influent flow is measured with a magnetic flow meter. The Head works consists of a combination fine screen and grit classifier unit with a capacity of 0.4 mgd (error, should be 0.7 million gallons per day "MGD"). The screenings and grit are discharged into separate dumpsters for disposal. An influent composite sampler samples the influent wastewater immediately after screening. Septage from the Carter area is hauled to the WWTF site. A Septage Receiving Station with a magnetic flow meter to record septage volume and to facilitate metering of flows into the treatment process. After screening and grit removal, the wastewater flows by gravity through an 8-inch pipe to the aeration splitter box. Stop gates allow influent wastewater to be channeled into any of the three (3) aeration basins. At startup, only one (1) of the aeration basins will be in service while at design capacity, two (2) aeration basins will be used. The third aeration basin can be used in the event the other basins need to be serviced. The aeration basins are designed with anoxic and aerobic zones. Three (3) pH adjustment chemical feed skids and one (1) Phosphorus removal chemical feed skid is provided. Following aeration, the wastewater flows into one (1) of two (2) final clarifiers (only using one clarifier right now, one on standby). Only one (1) clarifier is required to be on-line at any given time; the second unit is provided as a backup for maintenance purposes. Following clarification, effluent flows to an Ultraviolet (UV) disinfection unit. The UV disinfection system has a design average flow of 275 gpm and a peak flow of 350 gpm. After UV disinfection, effluent is discharged to the current outfall by gravity incorporating a series of manholes. Spill plates are provided in each of the manholes to increase Dissolved Oxygen (D.O.) levels in the effluent prior to discharge. Jennifer Spencer added that there are two lift stations in Carter WWTF collection system. Permit Fact Sheet Facility Description for the Stone Lake WWTP: The application and plans indicate that the permittee owns and operates a 0.07 mgd wastewater treatment plant using a recirculating sand filter. Wastewater is collected via two lift stations, twelve effluent pumps, and several thousand feet of gravity sewer and force main. The Stone Lake Wastewater Facility Modifications provided for Septic Receiving, Phosphorus removal and UV disinfection. The project also redirected influent wastewater to be screened prior to further treatment with the existing Recirculating Sand Filter. To accomplish this, the project included a new metal building with wastewater treatment equipment and exterior site improvements. In addition, the project included converting the existing Controls Building to storage and adding controls to tie the Main Lift Station Controls to the Septage Receiving. The Recirculating Sand Filter stayed in 3 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 place as-is. The discharge is continuous to a wetland from outfall 001 on the Reservation. The sludge from this facility is transported to the new Carter Wastewater Treatment Facility for dewatering with the Carter sludge. Final disposal is to a municipal solid waste landfill. Facility/Site Information Next, I asked some background questions. Unless noted otherwise, Bruce Johnson (Utility Manager) provided the responses in the table below. Have any bypasses or overflows happened at the plant or in the collection system in the last year? Industrial Users Are there any plans for renovation or additional equipment to allow for increased wastewater flow? Is there currently any portion of the treatment train that is nonoperational? Do you accept waste from septage haulers? Operation schedule? How do you manage your biosolids? Responsible official WWTP Design Capacity & Average Daily Flow WWTP Approx. # of residents served Contributing (or shared) Jurisdictions Do you use in-house laboratory analyses? CBI concerns? Stone Lake WWTP: Yes, this past spring due to snow melt. Actiflow system (phosphorus treatment) couldn't keep up, had to bypass (did not result in effluent limit exceedances). Carter WWTF: No. No, for both facilities. Stone Lake WWTP: early stages of plant design for new plant (activated sludge plant). Carter WWTF: No. No, for both facilities (response provided by Jennifer Spencer). No, for both facilities. 7am-5pm, Monday-Thursday, then operators on call (response provided by Jennifer Spencer). Landfill disposal. Bruce Johnson, for both facilities. Stone Lake WWTP: Design ~ 62,000 gallons per day ("GPD"). Carter WWTF: ~ 72,000 GPD. Average flow of 20,000-25,000 GPD for both facilities. Stone Lake WWTP: 156 connections. Carter WWTF: 68 connections. None, for both facilities. No, except pH and dissolved oxygen ("DO"), for both facilities (response provided by Jennifer Spencer). No. 4 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Locations Location/Area Opening Conference/Interview Non-DMR Reporting Effluent Limit Exceedance Review Self Monitoring O&M Flow Monitoring SSOs Pretreatment Physical Inspection Stone Lake WWTP Physical Inspection Carter WWTF Closing Conference Description FCPC Utilities office near the Stone Lake WTTP Stone Lake WTTP Carter WWTF FCPC Utilities office near the Stone Lake WTTP SECTION II - OBSERVATIONS Location: Interview/Non-DMR Reporting Observation #: DM1-OB-001 Date: 09/06/2023 Unless noted otherwise, Bruce Johnson (Utility Manager) provided the responses (in bold) below. Stone Lake WWTP: 1. Operation & Maintenance Plan Report submitted by January 31, 2023 (Part l.D.3.b)? Yes. 2. Mercury Minimization Program Status Report submitted by January 31, 2023 (Part I.D.4)? Yes. 3. Phosphorus Operational Evaluation Report submitted by June 30, 2020 (Part I.D.7)? Yes. 4. *Wetland Monitoring* submitted by August 31, 2021 and, biannually thereafter (Part 1.D.9)? Yes. 5. Wetland Mussel Study submitted by October 1 annually (Part I.D.10)? Yes. Carter WWTF: 1. Phosphorus Operational Evaluation Report submitted by June 30, 2020 (Part 1.D.3) ? Yes. 2. Mercury Minimization Program Status Report submitted by January 31, 2023 ( Part 1.D.4)? Yes. 3. Operation & Maintenance Plan Report submitted by January 31, 2023 (Part l.D.5.b)? Yes. 4. *Wetland Monitoring* submitted by August 31, 2021 and biannually thereafter (Part I.D.9)? Yes. 5. Wetland Mussel Study submitted by October 1 annually (Part I.D.10)? Yes. *Additional Ammonia N monitoring conducted between May 15 and June 15, and report submitted every other year beginning in 2021? Yes. Are the records and reports maintained by the permittee for at least 3 years? Yes. Location: Interview/Effluent Limit Exceedance Review Observation #: DM1-OB-002 Date: 09/06/2023 Unless noted otherwise, Bruce Johnson (Utility Manager) provided the responses (in bold) below. See summary of effluent limit exceedances from October 2020 to June 2023 in Appendix 2 - Document Log). 5 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Stone Lake WWTP: E.coli Effluent Limit Exceedances: May 2023, June 2023: due to UV system computer circuit board issue. UV system repaired and placed back in service in the first week of August 2023. Also, had E.coli violations in July 2023. No issues in since UV system was placed back online in August (response provided by Jennifer Spencer). May 2022 E.coli Effluent Limit Exceedance: Due to UV bulb issue (response provided by Nate Guldan). Carter WWTF: April 2023 Carbonaceous Biochemical Oxygen Demand ("CBOD") Effluent Limit Exceedance: based on my review of the April 2023 Discharge Monitoring Report ("DMR"), the CBOD effluent limit exceedance appears to be data entry error (reported >5 mg/l, should have been reported as 5 mg/l). Have all exceedances of daily effluent limits been orally reported to EPA within 24 hours: Yes. Location: Interview/Self Monitoring Observation #: DM1-OB-003 Date: 09/06/2023 Unless noted otherwise, Bruce Johnson (Utility Manager) provided the responses (in bold) below. Stone Lake WWTP: Are the influent and effluent sampling locations as specified in permit and representative of the waste stream? Yes, influent samples collected before the fine screen (response provided by Jennifer Spencer). Effluent samples collected right after UV disinfection. How are effluent composite samples collected? Autosampler, time-based. Are composite samples cooled to <4C to properly preserve them during the compositing period? Yes. Are temperature results recorded? Yes (response provided by Jennifer Spencer). Are all grab samples cooled with ice, gel packs or refrigerated to <6C from the time of collection until analysis including shipping time? Yes. Carter WWTF: Are the influent and effluent sampling locations as specified in permit and representative of the waste stream? Yes, influent samples collected before screen; effluent samples collected before after UV disinfection, before aeration steps. How are effluent composite samples collected? Autosampler, time-based. Are composite samples cooled to <4C to properly preserve them during the compositing period? Yes. Are temperature results recorded? Yes. Are all grab samples cooled with ice, gel packs or refrigerated to <6C from the time of collection until analysis including shipping time, if applicable? Yes. I reviewed laboratory sampling/bench sheets and observed that they include flow, pH, and DO information, including the dates, times, and location of sampling. However, the sheets do not include the time of analysis and name(s) of persons collecting and analyzing samples. 6 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Location: Interview/O&M Observation #: DM1-OB-004 Date: 09/06/2023 Unless noted otherwise, Bruce Johnson (Utility Manager) provided the responses (in bold) below. Stone Lake WWTP: Are all treatment units operable? Yes (response provided by Jennifer Spencer). Does a maintenance record system exist and include: As-built drawings - Yes. Maintenance history - Yes (response provided by Jennifer Spencer). Maintenance costs - Yes. Records of equipment repair and timely return to service - Yes. SOP for operation and maintenance of each item of major equipment - Yes, bound copies of all major equipment and sampling procedures. Operation and maintenance manual is available - Yes. Are qualified operating staff employed to carry out the operations at the facility? Yes, three certified operators for wastewater, and two in training. Is sludge wasted from treatment system at proper time intervals to maintain process efficiency? Yes, once every two months. On a regular basis, do operators monitor the key operating parameters and conducting the necessary adjustments to meet the limits of the Permit? Yes, operators conduct routine visual assessments and test for sludge characteristics, such as mixed liquor and suspended solids. Does the wastewater treatment facility have an alarm system for all essential equipment? Yes, SCADA with many alarms, including high and low tank levels, and power outage (response provided by Jennifer Spencer). Are alarms sent to qualified personnel who can respond immediately to remedy the problem? Yes, via email or call to on-call operator, then a call chain (to Jennifer Spencer and Nate Guldan; response provided by Jennifer Spencer). Are routine and preventive maintenance scheduled performed and recorded? Working on routine and preventive maintenance process improvement and recording. Implementing new work order process (response provided by Jennifer Spencer). Does the facility maintain written procedures for responding to emergencies such as power failures, floods, fires, and other natural disasters? Yes (response provided by Jennifer Spencer). Is a logbook kept which documents all plant activities on a daily basis? Yes, use many log sheets for different stations. Also use some notebooks (response provided by Jennifer Spencer). See Appendix 2 - Document Log, pages 26-28, for examples of log sheets. 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? Not yet, to be implemented with new work order system. Does the facility have standby power for all treatment units? Yes, generator at the plant, and a portable generator for lift station 2. Lift station 1 has backup generator. Collection System Info: Miles of conveyance: 11,650 feet of force main; 46,700 feet of gravity sewers. 7 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Number of lift stations: 2. Residents served: About 150 connections, not sure about the number of residents. Carter WWTF: Are all treatment units operable? Yes (response provided by Jennifer Spencer). Does a maintenance record system exist and include: As-built drawings - Yes. Maintenance history - Yes (response provided by Jennifer Spencer). Maintenance costs - Yes. Records of equipment repair and timely return to service - Yes. SOP for operation and maintenance of each item of major equipment - Yes, bound copies of all major equipment and sampling procedures. Operation and maintenance manual is available - Yes. Are qualified operating staff employed to carry out the operations at the facility? Yes, three certified operators for wastewater, and two in training. On a regular basis, do operators monitor the key operating parameters and conducting the necessary adjustments to meet the limits of the Permit? Yes, operators conduct routine visual assessments and test for sludge characteristics, such as mixed liquor and suspended solids. Does the wastewater treatment facility have an alarm system for all essential equipment? Yes, SCADA with many alarms, including high and low tank levels, and power outage (response provided by Jennifer Spencer). Are alarms sent to qualified personnel who can respond immediately to remedy the problem? Yes, via email or call to on-call operator, then to call chain (to Jennifer Spencer and Nate Guldan; response provided by Jennifer Spencer). Are routine and preventive maintenance scheduled performed and recorded? Working on routine and preventive maintenance process improvement and recording. Implementing new work order process (response provided by Jennifer Spencer). Does the facility maintain written procedures for responding to emergencies such as power failures, floods, fires, and other natural disasters? Yes (response provided by Jennifer Spencer). Is a logbook kept which documents all plant activities on a daily basis? Yes, use many log sheets for different stations. Also use some notebooks (response provided by Jennifer Spencer). See Appendix 2 - Document Log, for examples of log sheets. 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? Not yet, to be implemented with new work order system. Does the facility have standby power for all treatment units? Yes, backup generator at the plant, one of two lift stations has a backup generator, the other needs a portable generator (Lift Station#2 only serves a few houses). Collection System Info: Miles of conveyance: 29,548 feet of force main; 49,558 feet of gravity sewers. Number of lift stations: 2. Residence served: About 68 connections, not sure about the number of residents. 8 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Location: Interview/Flow Monitoring Observation #: DM1-OB-005 Date: 09/06/2023 Unless noted otherwise, Bruce Johnson (Utility Manager) provided the responses (in bold) below. Stone Lake WWTP: What type of influent meter is used? mag meter. What type of effluent meter is used? mag meter. Are influent and effluent flow measuring devices professionally calibrated, at least once per year? Yes, annually in September (response provided by Jennifer Spencer). Carter WWTF: What type of influent meter is used? mag meter. What type of effluent meter is used? mag meter. Are influent and effluent flow measuring devices professionally calibrated, at least once per year? Yes, annually in September (response provided by Jennifer Spencer). Location: Interview/SSOs Observation #: DM1-OB-006 Date: 09/06/2023 Bruce Johnson (Utility Manager) provided the responses (in bold) below. See Appendix 2 - Document Log, for SSO notification procedures. Stone Lake WWTP: Have there been any backups or overflows in the sanitary sewer collection system, including pump stations, manholes and piping since the last inspection? No. Basement backup complaints over the last year? No, other than issues with the individual septic systems. Carter WWTF: Have there been any backups or overflows in the sanitary sewer collection system, including pump stations, manholes and piping since the last inspection? No. Basement backup complaints over the last year? No. Location: Interview/Pretreatment Observation #: DM1-OB-007 Date: 09/06/2023 Bruce Johnson (Utility Manager) provided the responses (in bold) below. Stone Lake WWTP: Any industrial users? No. Carter WWTF: Any industrial users? No. 9 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Location: Physical Inspection of Carter WWTF Observation #: DM1-OB-008 Date: 09/06/2023 Weather: rainy Carter WWTF: Physical inspection observations are documented in the Photo Log (see Appendix 1). The physical inspection started: 2:15 PM (CT) and ended: 2:48 PM (CT). The final outfall was not accessible for observation. After the physical inspection of the Carter WWTF, we returned to the Stone Lake WWTP to conduct the physical inspection of the Stone Lake WWTP. Photo(s) 1.FCPC0302.JPG 2.FCPC0303.JPG 3.FCPC0304.JPG 4.FCPC0305.JPG 5.FCPC0306.JPG 6.FCPC0307.JPG 7.FCPC0308.JPG 8.FCPC0309.JPG 9.FCPC0310.JPG 10.FCPC0311.JPG Location: Physical Inspection of Stone Lake WWTP Observation #: DM1-OB-009 Date: 09/06/2023 Weather: rainy Stone Lake WWTP: Physical inspection observations are documented in the Photo Log (see Appendix 1). The physical inspection started at: 3:10 PM (CT) and ended at: 3:30 PM (CT). The final outfall was not accessible for observation. After the physical inspection of the Stone Lake WWTP, we returned to FCPC Utilities office for the closing conference. Photo(s) 1. FCPC0314.JPG 2. FCPC0315.JPG 3. FCPC0316.JPG 4. FCPC0317.JPG 5. FCPC0318.JPG 6. FCPC0319.JPG 7. FCPC0320.JPG 8. FCPC0321.JPG 9. FCPC0322.JPG 10. FCPC0323.JPG SECTION III - SAMPLING ACTIVITIES AND ANALYTICAL RESULTS No sampling was conducted. 10 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 SECTION IV - AREAS OF CONCERN Preliminary Areas of Concern may not be in sequential order. The presentation of Areas of Concern does not constitute a formal compliance determination or violation. AOC Reference #: DM1-OB-002 Location: Interview/Effluent Limit Exceedance Review Regulation and/or Permit Requirement Permit Part I.A. - Final Effluent Limitations and Monitoring Requirements. AOC: Stone Lake WWTP: E.coli Effluent Limit Exceedances: May 2023, June 2023: due to UV system computer circuit board issue. UV system repaired and placed back in service in the first week of August. Also, had E.coli violations in July 2023. No issues in since UV system was placed back online in August. Carter WWTF: April 2023 CBOD Effluent Limit Exceedance: based on review of the April 2023 DMR, the CBOD effluent limit exceedance appears to be data entry error (reported >5 mg/l, should have been reported as 5 mg/l). AOC Reference #: DM1-OB-003 Location: Interview/Self Monitoring Regulation and/or Permit Requirement Permit Part II.B.1. - Proper O&M. Proper operation and maintenance also include adequate laboratory controls and appropriate quality assurance procedures. AOC: Stone Lake WWTP and Carter WWTF: Laboratory sampling/bench sheets do not include the time of analysis and name(s) of persons collecting and analyzing samples (see Appendix 2 - Document Log, pages 26-28, for examples). AOC Reference #: DM1-OB-004 Location: Interview/O&M Regulation and/or Permit Requirement 1) Permit Part I.D.3.a.G.- Inventory and assessment of fixed assets. 2) Permit Part I.D.3.b.B.- Description of inspections and maintenance activities conducted and corrective actions taken during the previous year. AOC: Stone Lake WWTP and Carter WWTF: 1) Facility does not maintain an inventory of spare parts. 2) Facility does not have a system to record routine and preventive maintenance performed. 11 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 SECTION V - CLOSING CONFERENCE AND FOLLOW UP Closing Conference I began the closing conference with FCPC personnel at 03:30 PM (CT) on 09/06/2023. During the closing conference, I discussed the preliminary observations and Areas of Concern identified during the inspection and summarized above. Preliminary Areas of Concern have not yet been evaluated for a formal compliance determination. I reviewed the timing for completing the inspection report and went over the documents received during the inspection (See Appendix 2 - Document Log). I received copies of records requested prior to the inspection. I asked if there were any questions before concluding the inspection. FCPC representatives asked for an appropriate contact at EPA to discuss permit issues. I referred them to the EPA Region 5 Permits Program and provided contact information. With no further questions, we concluded the inspection at 03:45 PM (CT). Follow Up No follow up was required after exiting the facility on 09/06/2023. Communication Log No additional information received by EPA Region 5 after exiting the Facility on 09/06/2023. SECTION VI - LIST OF APPENDICES 1. Photo Log 2. Document Log 12 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 APPENDIX 1: PHOTO LOG Influent Autosampler (ISCO) 09/06/2023 02:18 PM No CBI Physical Inspection Carter WWTF Noted thermometer with heat sink. No PII FCPC0302.JPG Photographer: Dean Maraldo Geographic coordinates not available Headworks - Vortex screen 09/06/2023 02:18 PM No CBI Physical Inspection Carter WWTF No PII FCPC0303.JPG Photographer: Dean Maraldo Geographic coordinates not available 13 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Aeration Basin (Northern basin) FCPC0304.JPG 09/06/2023 02:20 PM No CBI No PII Photographer: Dean Maraldo Physical Inspection Carter WWTF Geographic coordinates not available One of three aeration basins (only one needed at time of inspection, based on flows) Sludge digestor 09/06/2023 02:21 PM No CBI Physical Inspection Carter WWTF One of two digestors. No PII FCPC0305.JPG Photographer: Dean Maraldo 45.40133833, -88.62643666 14 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Aeration blowers 09/06/2023 02:22 PM No CBI No PII Physical Inspection Carter WWTF Blowers (4) for aeration basins and digestors. FCPC0306.JPG Photographer: Dean Maraldo 45.40133166, -88.62624166 Clarifier FCPC0307.JPG 09/06/2023 02:23 PM No CBI No PII Photographer: Dean Maraldo Physical Inspection Carter WWTF 45.40145833, -88.62622499 One of two clarifiers. Only one clarifier in use at the time of inspection, based on flows. 15 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Clarifier FCPC0308.JPG 09/06/2023 02:24 PM No CBI No PII Photographer: Dean Maraldo Physical Inspection Carter WWTF 45.40145833, -88.62622499 Noted effluent trough appeared clear and free of debris. UV Treatment System 09/06/2023 02:25 PM No CBI Physical Inspection Carter WWTF UV treatment consists of eight bulbs. No PII FCPC0309.JPG Photographer: Dean Maraldo 45.40145833, -88.62622499 16 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Effluent Autosampler (ISCO) FCPC0310.JPG 09/06/2023 02:25 PM No CBI No PII Photographer: Dean Maraldo Physical Inspection Carter WWTF 45.40145833, -88.62622499 Noted thermometer with heat sink. Effluent tubing clean and clear of debris. Chemical feed system FCPC0311.JPG 09/06/2023 02:27 PM No CBI No PII Photographer: Dean Maraldo Physical Inspection Carter WWTF 45.40145833, -88.62622499 Chemical feed for aluminum sulfate and sodium hydroxide. 17 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Influent Autosampler (ISCO) 09/06/2023 03:13 PM No CBI Physical Inspection Stone Lake WWTP No PII FCPC0314.JPG Photographer: Dean Maraldo Geographic coordinates not available Headworks - fine screen 09/06/2023 03:14 PM No CBI Physical Inspection Stone Lake WWTP No PII FCPC0315.JPG Photographer: Dean Maraldo Geographic coordinates not available 18 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Sand filter beds FCPC0316.JPG 09/06/2023 03:16 PM No CBI No PII Photographer: Dean Maraldo Physical Inspection Stone Lake WWTP 45.56948, -88.85437499 Three sand filter beds. Beds appeared well maintained. Jennifer Spencer said sand filter beds are maintained weekly. Actiflo treatment unit FCPC0317.JPG 09/06/2023 03:18 PM No CBI No PII Photographer: Dean Maraldo Physical Inspection Stone Lake WWTP 45.56948, -88.85437499 According to the manufacturer (Veolia), the Actiflo system provides high-rate clarification based on ballasted flocculation using microsand and polymers. 19 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 UV treatment system 09/06/2023 03:19 PM No CBI Physical Inspection Stone Lake WWTP No PII FCPC0318.JPG Photographer: Dean Maraldo 45.56948, -88.85437499 Effluent Autosampler (ISCO) FCPC0319.JPG 09/06/2023 03:19 PM No CBI No PII Photographer: Dean Maraldo Physical Inspection Stone Lake WWTP 45.56948, -88.85437499 Noted thermometer with heat sink. Effluent tubing clean and clear of debris. 20 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Effluent flow meter and tap 09/06/2023 03:21 PM No CBI Physical Inspection Stone Lake WWTP No PII FCPC0320.JPG Photographer: Dean Maraldo 45.56948, -88.85437499 Operations whiteboard with operator notes 09/06/2023 03:21 PM No CBI No PII Physical Inspection Stone Lake WWTP FCPC0321.JPG Photographer: Dean Maraldo 45.56948, -88.85437499 21 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 Phosphorus sludge tanks (2) 09/06/2023 03:22 PM No CBI Physical Inspection Stone Lake WWTP No PII FCPC0322.JPG Photographer: Dean Maraldo 45.56948, -88.85437499 SCADA Display 09/06/2023 03:25 PM No CBI Physical Inspection Stone Lake WWTP No PII FCPC0323.JPG Photographer: Dean Maraldo 45.56948, -88.85437499 22 of 33 Stone Lake WWTP and Carter WWTF Inspection Date: 09/06/2023 APPENDIX 2: DOCUMENT LOG Documents Received Document Name Contains CBI or PII Date Received Pages Emails reporting treatment and reporting issues to EPA No 9/6/2023 5 (12/2022-5/2023) Carter Utility maps and plans Yes* 9/6/2023 207 Stone Lake Utility maps and plans Yes* 9/6/2023 687 SSO notification procedures No 9/6/2023 1 Chain of custody forms (June-August 2023) No 9/6/2023 455 Examples of operator records and lab forms No 9/6/2023 6 Operator certificates No 9/6/2023 8 Carter WWTF facility specifications and drawings Yes* 9/6/2023 >1000 Carter WWTF generator Info No 9/6/2023 34 NPDES permits and application records for Carter WWTF No 9/6/2023 146 and Stone Lake WWTP DMRs (August 2022 - June 2023) No 9/6/2023 89 Mercury Status Reports 2022 (Stone Lake WWTP and No 9/6/2023 32 Carter WWTF) O&M Reports 2022 (Stone Lake WWTP and Carter WWTF) No 9/6/2023 15 Phosphorus Sludge Reports 2022 (Stone Lake WWTP and No 9/6/2023 6 Carter WWTF) Wetland Mussel Reports 2022 (Stone Lake WWTP and No 9/6/2023 14 Carter WWTF) EPA ECHO Effluent Limit Exceedance Summary Report No Provided by EPA 1 (10/2020-6/2023) * Documents not included in report to protect against disclosure of potentially sensitive infrastructure locations. Attached to Report? No No No Yes No Yes No No No No No No No No No Yes 23 of 33 Effluent Limit Exceedances Report W10058424: CRANDON RECIRCULATING SAND FILTER/STONE LAKE WWTP, CRANDON, WI 54520 Monitoring Period Date Range: 10/01/2020 to 06/30/2023 Exceedance Details Monitoring Period Date 10/31/2020 3/31/2021 5/31/2022 5/31/2022 7/31/2022 5/31/2023 5/31/2023 6/30/2023 6/30/2023 Outfall 1 1 1 1 1 1 1 1 1 Parameter Description Phosphorus, total (as P) pH E. coil E. coil Oxygen, dissolved (DO) E. coil E. coli E. coil E. coil Limit Type MO AVG MINIMUM 3ODA GM DAILY MX DAILY MN 3ODA GM DAILY MX 3ODA GM DAILY MX DMR Value 0.63 5.3 217 690 3.6 373 1400 1950 2500 dmr_valu DMR e_qualifie Value r Unit = mg/L = SU = #/100mL = #/100mL = mg/L = #/100mL = f/100mL > #/100mL = #h100mL Limit Value 0.6 6 126 410 4 126 410 126 410 Limit Value Qualifier <= % Exceedance 5 <= 72 <= 68 >= 10 <= 196 <= 241 <= Limit Violation <= 510 Stone Lake WWTP and Carter WWTF Inspection Report 24 of 33 Effluent Limit Exceedances Report W10058432: FCPC CARTER WTF Monitoring Period Date Range: 10/01/2020 to 06/30/2023 Exceedance Details Monitoring Period Date 3/31/2021 4/30/2023 Outfall 1 1 Parameter Description pH BOD, carbonaceous, 05 day, 20 C Limit Type MAXIMUM MO AVG DMR Value 8.8 5 DMR dmr_value_ Value qualifier Unit = SU mg/L Limit Value 8.5 20 Limit Value Qualifier <= <= % Exceedance Limit Violation Stone Lake WWTP and Carter WWTF Inspection Report 25 of 33 Sample Temperature Forest County Potawatomi Community Carter Wastewater Treatment Facility MONTH _ j/ YEAR P DATE _________ Time ________ L-3 ,i-Z3 i-K--7--3 -1- _______ Ti -;'y_7ji? 7-2S-2% -2-2? lw 7._ 1 c') Co 7 7'.I7 7is Operator ________ / ,r/c4 yv/~jJ 'p,/f/I tnfluent Influent Sample Temp. Sampler Temp. ________ e4+ 4'4( ________ J kIf Influent P.H. - _____ Effluent P.H. _____ _____ _____ ______ __________ 3(s -J vJcH LJ vi/SJ1 3/5H 'ii __________ __________ U ________ Z) ______ ______ ?1 _____ z'18 ______ 7S/ _____ zS( Effluent D.O. ________ 1L7( ________ r1L LI _ 2( ________ ________ S.iO Effluent Effluent Sample Temp. Sampler Temp ________ ________ 7.f _______ 22 _________ __________ __________ 17 __________ -_ _________ _________ ________ ________ ________ 22 Stone Lake WWTP and Carter WWTF Inspection Report 26 of 33 Stone Lake WWTP and Carter WWTF Inspection Report 30 of 33 Stone Lake WWTP and Carter WWTF Inspection Report 28 of 33 Stone Lake WWTP and Carter WWTF Inspection Report 27 of 33 Stone Lake WWTP and Carter WWTF Inspection Report 29 of 33 Stone Lake WWTP and Carter WWTF Inspection Report 31 of 33 Stone Lake WWTP and Carter WWTF Inspection Report 32 of 33 Sanitary Sewer Overflow (SSO) Procedure In the event of any SSO, please follow the below steps in compliance with the NPDES Discharge Permit: 1. Notify immediate supervisor of event 2. Supervisor will notify the EPA in accordance with the NPDES permit: a. Report any noncompliance which may endanger health or the environment, within 24 hours from the time the permittee becomes aware of the circumstances by calling 312886-6106. A written submission shall also be provided within 5 days of the time the permittee becomes aware of the circumstances to address mentioned in the permit. b. Written submission shall contain a description of the noncompliance and its cause; the period of noncompliance, including exact dates and times; if the noncompliance has not been corrected; the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and precent recurrence of the noncompliance. Stone Lake WWTP and Carter WWTF Inspection Report 33 of 33