Document oD8XONBMmre7erYjenb9JEqG7

UST Inspection Report Dakota Magic Date of Report: Inspection Date & Time: Weather: Facility Owner: Facility Owner Address: June 20, 2025 May 20, 2025, at 12:21 p.m. Central Daylight Time (CDT) Rainy, ~50 degrees Fahrenheit Sisseton Wahpeton Oyate Tribe 12554 BIA Hwy 711 Agency Village, SD 57262 Facility Address: 16849 102nd St. SE Hankinson, ND 58041 Facility Representative: EPA Facility ID Number: Reason for Inspection: Inspection Team: 3030002 Routine compliance inspection Marta Grabowski, Inspector, EPA UST Program UST System Description The Dakota Magic (Facility) is a Tribally-owned gas station and convenience store located on the Lake Traverse Reservation in Hankinson, North Dakota. The fuel at this Facility is sold to the public. The Environmental Protection Agency's Facility records indicate the Facility has five double-walled, composite (steel w/ fiberglass reinforced plastic (FRP)), underground storage tanks (UST) installed in May 2023. Tank names, capacities, and products are listed in the table below. Piping for all tanks is pressurized, double-walled flex plastic. Tank Number 1 2 3 4 5 Product stored 87 gasoline 89 gasoline 91 gasoline Roadmaster Diesel 2 Tank Capacity (gallons) 20,000 12,000 12,000 12,000 8,000 Inspection Narrative On May 20, 2025, the EPA UST program personnel conducted an inspection at Dakota Magic in Hankinson, North 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 3030002-Dakota Magic Page 1 of 3 5/20/2025 UST Inspection 16, 2025, and sent a follow-up email to schedule the inspection and provide inspection details (see Attachment A). Ms. Grabowski arrived at the Facility at 12:20 p.m. CDT along with and from the Tribal environmental department. Ms. Grabowski introduced herself to the Facility operator and presented inspector credentials. She proceeded to conduct a physical inspection of the UST system as well as a review of Facility records. Photographs of UST system components are included with the inspection checklist in Attachment B. Copies of operation and maintenance records are in Attachment C. Tank Leak Detection Tank leak detection is conducted by a Veeder Root TLS 450 Plus automatic tank gauge (ATG), which performs interstitial monitoring via sensors in each tank. The Facility representative provided 12 months of "normal" sensor status printouts. Annual operability testing for the ATG console and tank sensors was conducted and passed on March 6, 2025. Piping Leak Detection Piping leak detection is satisfied by electronic line leak detectors (ELLD) and interstitial monitoring via sensors in each submersible turbine pump (STP) sump and under dispenser containment (UDC) sump. The Facility representative provided 12 months of "normal" sump sensor status printouts. Equipment test records were also maintained onsite. Annual operability testing for the ELLDs and sump sensors was conducted and passed on March 6, 2025. Hydrostatic testing of containment sumps (STP and UDC) was conducted and passed on May 24, 2023. 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 for spill buckets and overfill prevention devices (high-level alarm) were available onsite at the time of inspection. The high-level alarm passed inspection/testing on March 6, 2025, and the spill buckets passed testing on May 24, 2023. Periodic Operation & Maintenance (O&M) Walkthrough Inspections Records of monthly walkthrough inspections were available onsite for the previous 12 months. Annual walkthrough tasks were performed on March 6, 2025, by a service provider; however, it was not separately documented on a walkthrough checklist. Operator Training Copies of Class A/B operator training certificates, as well as Class C operator documentation, were available onsite at the time of inspection. 3030002-Dakota Magic Page 2 of 3 5/20/2025 UST Inspection Financial Responsibility The Facility representative provided documentation of private insurance coverage for the USTs. The policy coverage became effective on June 6, 2023, and it expires on June 12, 2025. Physical Observations The EPA inspector viewed the spill buckets/fill pipes, under dispenser containment (UDC) sumps, tank top sumps, tank interstice risers, high-level alarm enunciator, and the ATG console. The ATG console displayed an overfill alarm at the time of inspection. The Facility representative stated that an overfill had occurred earlier in the day and was cleaned up prior to the inspection. It was actively raining during the inspection, and the spill buckets each contained a small amount of liquid. The high-level overfill alarm enunciator was tested and confirmed to be operational at the time of inspection. Liquid sensors were present and properly positioned in each UDC sump and STP sump. 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. 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 and inspection checklist C. Facility O&M Documents D. Onsite Deficiency Identification Form Signature Lead Inspector MARTA GRABOWSKI Date: 2025.06.20 10:57:42 -06'00' Digitally signed by MARTA GRABOWSKI Marta Grabowski Date of signature 3030002-Dakota Magic Page 3 of 3 5/20/2025 UST Inspection