Document bB3aGKeLwoXxLV9BJ4yMmKmXg

UST Inspection Report Agency Village C-Store Date of Report: Inspection Date & Time: Weather: Facility Owner: Facility Owner Address: June 23, 2025 May 20, 2025, at 2:30 p.m. Central Daylight Time (CDT) Rainy, 50 degrees Fahrenheit Sisseton Wahpeton Oyate Tribe 12554 BIA Hwy 711 Agency Village, SD 57262 Facility Address: 45680 Veterans Memorial Drive Agency Village, South Dakota 57262 Facility Representative: EPA Facility ID Number: Reason for Inspection: Inspection Team: 4030062 Routine compliance inspection Marta Grabowski, Inspector, EPA UST Program UST System Description The Agency Village C-Store (Facility) is a Tribally-owned gas station and convenience store located on the Lake Traverse Reservation in Agency Village, South Dakota. The fuel at this Facility is sold to the public. The Environmental Protection Agency's Facility records indicate the Facility has three, singlewalled, STI-P3 underground storage tanks (UST) that were installed in June 2002. Tank 1 is 8,000 gallons and stored unleaded 87 gasoline but was taken out of service in 2022 or 2023, according to the Facility representative. Tank 2 is 6,000 gallons and stores premium gasoline. Tank 3 is 4,000 gallons and stores diesel fuel. Piping for all tanks is pressurized, flex plastic (according to the UST notification form). Inspection Narrative On May 20, 2025, the EPA UST program personnel conducted an inspection at Agency Village C-Store in Agency Village, South Dakota. The EPA last inspected the Facility on May 3, 2022, and they selected it for routine re-inspection. Ms. Grabowski, the EPA inspector, spoke with the Facility representative on April 17, 2025, and she sent a follow-up on May 1, 2025, to schedule the inspection and provide inspection details (see Attachment A). Ms. Grabowski arrived at the Facility at 2:30 p.m. CDT along with and from the Tribal environmental department. Ms. Grabowski introduced herself to the Facility representative and presented inspector credentials. Ms. Grabowski proceeded to conduct a physical 4030062-Agency Village CStore Page 1 of 3 5/20/2025 UST Inspection inspection of the UST system as well as a review of Facility records. Photographs of UST system components taken during the inspection are in Attachment B. Copies of operation and maintenance records are in Attachment C. Tank Leak Detection Tank leak detection is conducted by a Red Jacket automatic tank gauge (ATG); however, a system status report printed at the time of inspection indicated "probe out" for all three tanks. No records of release detection tests were available or able to be printed. The ATG console screen for in-tank inventory displayed "no active tanks." The console was in warning status and alarm status at the time of the inspection. Annual operability testing for the ATG console was not provided. The last ATG test on file with EPA is dated June 1, 2021. The Facility representative showed the EPA inspector a manual log of fuel deliveries and tank measurements as an attempt to monitor the tanks in lieu of a functional ATG system. Piping Leak Detection Piping is equipped with electronic line leak detectors (ELLD); however, pressure line leak test results printed at the time of inspection indicated that tightness testing hadn't occurred since January 2023, and only one piping run was displayed on the printout. No other records of piping release detection tests were available. Annual operability testing for the ELLDs was not provided. The last ELLD test on file with EPA is dated June 1, 2021. Cathodic Protection Cathodic protection (CP) test results were not provided. The last CP test on file with EPA is dated June 1, 2021. Periodic Testing/Inspection of Spill and Overfill Prevention Equipment Triennial testing records for spill buckets and overfill prevention devices (high-level alarm) were not provided. The last spill bucket test on file with EPA is dated June 1, 2021. The last high-level alarm test on file with EPA is dated May 2, 2022. Periodic Operation & Maintenance (O&M) Walkthrough Inspections No records of monthly and annual walkthrough inspections were provided. Operator Training No operator training records were provided. Facility representatives explained that the former store manager left in November 2023. One current Facility representative stated he was working on the Class A/B operator online certifications. Financial Responsibility In South Dakota, financial coverage for regulated UST systems is provided through the South Dakota Petroleum Release Compensation Fund. Each UST facility is responsible for the deductible. No records 4030062-Agency Village CStore Page 2 of 3 5/20/2025 UST Inspection of state fund coverage were provided during the inspection. On May 23, 2025, the EPA inspector emailed the South Dakota certificate to be filled out and maintained onsite. Physical Observations The EPA inspector viewed the spill buckets/fill pipes, dispensers, tank top sumps, high-level alarm enunciator, one ATG riser, and the ATG console. All STP sumps contained significant levels of liquid such that STP components were not visible. The UDCs contained dirt and mud, but metal pipe components were isolated from the soil by a surrounding pipe. Spill buckets for Tank 2 and Tank 3 contained liquid. No flapper valves were present in the fill pipes, and the high-level alarm enunciator for overfill prevention did not sound when the test button was pressed. The Facility representative gauged Tank 1 using a stick, and it indicated approximately 4 inches of liquid in the tank. Inspection Conclusions and Recommendations At the end of the inspection, the EPA inspector filled out an Onsite Deficiency Identification Form (see Attachment D), which represents initial compliance recommendations at the time of the inspection. Prior to departing the Facility, Ms. Grabowski stated that a full inspection report would be forthcoming, which includes the inspection checklist (see Attachment E). Ms. Grabowski provided the Facility representative with the deficiency form and retained a carbon copy for recordkeeping. Inspection Report Attachments A. Record of communication for scheduling the inspection B. Photo log C. Facility O&M Documents D. Onsite Deficiency Identification Form E. Inspection checklist Signature Lead Inspector MARTA GRABOWSKI Date: 2025.06.23 14:20:23 -06'00' Digitally signed by MARTA GRABOWSKI Marta Grabowski Date of signature 4030062-Agency Village CStore Page 3 of 3 5/20/2025 UST Inspection