Document rpEeeB0zewr6RekwZLmnEm6Rr

UST Inspection Report Gus Stop Date of Report: Inspection Date & Time: Weather: Facility Owner: Facility Owner Address: October 18, 2024 September 10, 2024, at 12:57 p.m. Central Daylight Time (CDT) Sunny, 90 degrees Fahrenheit G.F. Buche Co. 102 S. Main Street Wagner, South Dakota 57380 Facility Address: 620 2nd Street Mission, South Dakota 57555 Facility Phone: Facility Representative: EPA Facility ID Number: Reason for Inspection: Inspection Team: 4080031 Routine compliance inspection Inspector, EPA UST Program Inspector, EPA UST Program Rosebud Sioux Tribe UST Coordinator UST System Description The Gus Stop (Facility) is a privately-owned gas station and convenience store located in Mission, South Dakota. The fuel at this Facility is sold to the public. The Environmental Protection Agency's Facility records indicate that the Facility has three, fiberglass reinforced plastic (FRP) underground storage tanks (UST) that were installed in June 1998. Tanks 1 and 2 each have a 12,000-gallon capacity and store gasoline. Tank 3 has a 4,000-gallon capacity and stores diesel fuel. Piping for all tanks is pressurized, double-walled flex plastic. Inspection Narrative On September 10, 2024, the EPA UST program personnel conducted an inspection at Gus Stop in Mission, South Dakota. The EPA last inspected the Facility on August 5, 2021, and they selected it for routine re-inspection. Ms. spoke with the Facility representative, and sent a follow-up email, on August 23, 2024, to schedule the inspection and provide inspection details (see Attachment A). 4080031-Gus Stop Page 1 of 3 9/10/2024 UST Inspection The inspection team arrived at the Facility at 12:57 p.m. CDT and were met by the Facility representative. Ms. introduced herself and presented inspector credentials. Ms. filled out a Notice of Inspection (NOI) (see Attachment B) and requested a signature from the Facility representative. Ms. explained that the NOI serves as documentation of consent for the EPA to conduct an inspection. In addition, she said that she would provide the NOI to the Facility at the end of the inspection. EPA inspectors conducted a physical 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 C. Copies of operation and maintenance records are in Attachment D. Tank Leak Detection Tank leak detection equipment consists of an OPW EECO 1500 automatic tank gauge (ATG), which normally conducts static leak tests; however, the leak test function was not working at the time of inspection. Furthermore, 30-day leak test records were not available for any of the last 12 months. The ATG probes and floats were functioning normally, as evidenced by passing annual operability testing conducted on September 4, 2024. Piping Leak Detection Piping leak detection is satisfied by mechanical line leak detectors (MLLD) and annual line tightness testing. Records of annual line tightness testing and annual line leak detector testing were available onsite, showing passing tests conducted on September 4, 2024. Cathodic Protection Cathodic protection (CP) is not required at the Facility. The portion of tanks and piping that are in contact with soil are constructed from non-corrodible materials. Periodic Testing/Inspection of Spill and Overfill Prevention Equipment Triennial testing records of spill buckets and overfill prevention devices (flapper valves) were not maintained onsite. According to EPA records, including an invoice dated July 14, 2022, two spill buckets/overfill valves were replaced after failed tests. The third spill bucket and valve had passed testing (according to test reports received by EPA on January 6, 2022) and did not need to be replaced at that time. Periodic Operation & Maintenance (O&M) Walkthrough Inspections Records of monthly walkthrough inspections from January 2024 to September 2024 were provided at the time of inspection. An annual walkthrough inspection was conducted during the compliance inspection on September 10, 2024. Operator Training A certificate for Class A/B operator training was maintained onsite at the time of inspection as well as Class C training documentation. 4080031-Gus Stop Page 2 of 3 9/10/2024 UST Inspection