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4.1 MPCA Compliance Evlauation InspectionMinnesota Pollution Control Agency 520 Lafayette Road North I St. Paul, Minnesota 55155-4194 1 651-296-6300 800-657-3864 1 Use your preferred relay service I info.pca@state.mn.us I Equal Opportunity Employer June 9, 2016 JUN 13 201h Hon. Randall Simonson, Mayor City of Scandia CITY OF SCANDIA 14727 209th Street North Scandia, MN 55073 RE: Bliss Collector Wastewater Treatment Facility State Disposal System Permit No. MN0054119 Compliance Evaluation Inspection Dear Mayor Simonson: Enclosed is the Compliance Evaluation Inspection (CEI) Report that resulted from an inspection of the Bliss Collector Wastewater Treatment Facility (Facility) on May 24, 2016, by Kaitlin Jamieson of the Minnesota Pollution Control Agency (MPCA). The CEI consisted of a visual inspection of the Facility and a discussion with Jeff Anderson -Maintenance Worker and Dave Williams -Public Works Director. In addition, there was a review of the monthly Discharge Monitoring Reports (DMRs) for the time period from September 1, 2012 to May 24, 2016. Based on the results of the CEI, violations of the terms and conditions set forth in the State Disposal System (SDS) permit were noted. Please see the attached CEI Report for further detail. To address the violations, the MPCA requests a written response within 30 days of receipt of this report. If you have any questions, please contact me at 651-757-2306 or kaitlin.jamieson@state.mn.us. Sincerely, ��" YOO"4r,"*V This document has been electronically signed. Kaitlin Jamieson Environmental Specialist 2 Municipal and Industrial Wastewater Section Municipal Division KJ:wgp Enclosure cc: Jeff Anderson, City of Scandia Neil Soltis, City of Scandia t-wq-wwprm2-33 • 4118116 Minnesota Pollution Control Agency Water Quality Point Source Program Compliance Evaluation Inspection Report Facility information: Facility name: Bliss Collector WWTP Permit number: MN0054119 Address: 18925 Manning Trail, Scandia, Minnesota 55073 SIC code: 4952 - Sewerage Systems Permit expiration date: February 29, 2020 Facility design flow: 0.02 mgd (AWW) EPA Facility Type classification: EPA Minor Type of flow: Domestic Plant class: Class D Land application type: Septage 24-hour contact: Public Works Office Phone: 651433-5223 Geographic information: MPCA region: MPCA Metro Region County: Washington Basin: St. Croix River Major watershed: Lower St. Croix River Receiving water: Not applicable Those present during the inspection: Jeff Anderson, Maintenance Worker Dave Williams, Public Works Director MPCA representatives: Kaitlin Jamieson, Compliance Inspector Inspection information: Inspection date: May 24, 2016 Inspection category: Routine Inspection Inspection type: WW Compliance Evaluation Inspection Facility components: • Collection system (gravity and/or pressure) • Collection system (gravity septic tank effluent) • Collection system (pumped septic tank effluent) • Effluent Disposal - Subsurface Trench/Bed • Effluent filtration (sand without backwash) • Individual or Community SSTS • Primary treatment - septic tank • Single Pass Media Filter t-wq-wwprm2-33 • 4118116 i I al V- Minnesota Pollution Control Agency Significant industrial users: 4952 - Sewerage Systems Treatment plant operators: Jeff Anderson, Class D certification, expires June 1, 2016 (renewal requested) Service Provider certification, expires February 13, 2019 t-wq-wwprm2-33 • 4118116 Inspection Summary A Compliance Evaluation Inspection was conducted on May 24, 2016, by Kaitlin Jamieson of the Minnesota Pollution Control Agency (MPCA) to determine the Facility's compliance with the terms and conditions of its State Disposal System (SDS) Permit. The following is a summary of the findings and comments resulting from that inspection. Areas of Concern or General Comments: 1. Overall Physical Condition of the Facility a. The Facility appeared well maintained and appeared to be in good operating condition. b. The Facility grounds were fenced, gated, posted and locked. Sampling Methods/Lab Certification a. All samples are taken at the appropriate locations as identified in the permit, and are representative of flow through the Facility and treatment system. b. Sampling is performed by Facility staff. c. Samples are delivered to a contract lab for analysis, Pace Analytical Services Inc. — Virginia, Minnesota, Minnesota Department of Health State lab ID #027-137-445, EPA Lab Code MN01084. The lab results records are adequate and maintained for a minimum of three years. d. pH testing is performed on site by the Facility operator. Original pH meter readings and pH meter calibration logs were not adequately kept. See the Alleged Violations section for further description. 3. Discharge Monitoring Reports (DMRs)/Sample Values/Annual Reports a. Several DMRs due over the review period were submitted late. b. The monitoring data was accurately reflected on the DMRs. c. Daily/Sample values have been submitted with all DMRs. 4. Inflow & Infiltration (1&1)/ Collection System issues a. The collection system consists of 70 individual septic tanks and 46 shared septic tank effluent pumping (STEP) systems which pump to one of two lift stations. b. Lift station pumps are pulled annually for maintenance and cleaning. c. The main lift station is set to be replaced in the near future. d. The city of Scandia (City) coordinates pumping the individual septic tanks. Tank levels are measured annually, and pumped as needed. e. The Facility experiences some I&I issues. 5. Flow data The Facility's design flow is 0.0198 million gallons per day (MGD). The Facility's reported average influent flows over the past several years were: i. 2013-0.007 MGD ii. 2014-0.010 MGD iii. 2015-0.007 MGD iv. 2016-0.008 MGD (to date) c. The reported three-year average influent flow at the Facility is about 0.008 MGD. The Facility appears to be operating at approximately 40 percent of the permitted design capacity. d. WS001 pumps are used to monitor flow for permit reporting. Pump run times are recorded daily. The operators can remotely access pump run time information. e. Pumps are pulled annually for cleaning, maintenance and calibration. Pump calibration records are stored electronically and have been maintained for three years. Enforcement Actions over the review period a. None. t-wq-wwprm2-33 • 4118116 7. Compliance Schedule progress a. A Compliance Schedule was included in the current permit due to concerns with the Facility's ability to consistently meet the state drinking water standard for nitrate at monitoring well GW -004. b. The Compliance Schedule required a Nitrogen Mitigation Plan (Plan) be submitted by March 18, 2016. A Plan was submitted to the MPCA on March 14, 2016, but it did not include all the required information. The City has hired the firm Bolton & Menk to assess the treatment system and prepare a detailed Plan. The Plan should be completed and submitted to the MPCA promptly. c. A final report is required September 2, 2019 (180 days prior to permit expiration). i. Permit Chapter 1, section 1.2. The report shall serve as a performance report and summarize the treatment system's ability to consistently achieve compliance with the Minnesota Department of Health (MDH) drinking water standard of 10 milligrams per liter (mg/L) for Nitrate Nitrogen at either the end of discharge of the treatment facility or within the downstream monitoring wells. The performance report shall include, if necessary, what is needed to maintain compliance with the MDH standard of 10 mg/L, including recommendations concerning modifications to the facility design, operation, and/or maintenance. 8. Biosolids/Land Application Sites a. The 2013 and 2015 Biosolids Annual Reports due over the review period were submitted late. See the Alleged Violations section for further description. 9. Pretreatment a. Not applicable. Only residential homes are connected to the Facility. 10. General Maintenance Schedule a. Operation and Maintenance manuals for Facility components were maintained on site. b. The general maintenance schedule was appropriate and followed. c. Facility grounds and drainfields are mowed a couple times each year, as needed. d. There were some signs of gopher mounds on site. The operators control gophers as needed. e. Facility tanks are pumped approximately each year. f. Two of the three drainfields were being operated. Drainfield number two has been rested for a couple years to try and minimize impacts to monitoring well GW -004. g. There are three sand filters, and each year the operator rotates which filters are in use. 11. Record Keeping Most required records were neatly kept and available upon request. 12. Other a. 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Within 30 days of receipt of this CEI, the Permittee shall summarize the cause of the permit limit exceedances and describe any actions taken to ensure these do not occur in the future. 2. Within 30 days of receipt of this CEI, the Permittee shall submit a complete Nitrogen Mitigation Plan. 3. Within 30 days of receipt of this CEI, the Permittee shall summarize the cause of the late reports and describe what actions have been or will be taken to ensure all reports are submitted on time in the future. 4. Within 30 days of receipt of this CEI, the Permittee shall submit a summary to the MPCA demonstrating how adequate records will be maintained for at least three years including records of equipment calibrations on meters used for on-site analysis, flow meter verification or calibrations performed twice annually, and original sampling records that include sample time and analysis time. June 9, 2016 Date signed STATE OF MINNESOTA POLLUTION CONTROL AGENCY rte" Ya'r"e.,"ov This document has been electronically signed. Kaitlin Jamieson Environmental Specialist 2 Municipal and Industrial Wastewater Section Municipal Division Address questions and submittals requested above to: Kaitlin Jamieson Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55112 651-757-2306 kaitlin.jamieson@state.mn.us t-wq-wwprm2-33 • 4118116 9