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Report Section Opinion <br />drains into the subsurface of the Property. It is possible that over <br />time, hazardous chemicals have entered the drain and are <br />present in the subsurface of the Site. In addition, staining was <br />observed under the AST located outside the garage. The surficial <br />solid waste area is considered a REC since it is possible that a <br />release of hazardous chemicals and/or petroleum products has <br />occurred in the area. <br />7.0 INTERVIEWS The diesel and gasoline USTs located on the former bus lot, and <br />the gasoline UST located near the garage are considered a REC <br />since it is possible that petroleum contamination is present near <br />the tanks. The bus maintenance garage is considered a REC due <br />to the use and storage of hazardous chemicals/petroleum <br />products, including chlorinated solvent compounds used in <br />brake cleaner, commonly associated with vehicle maintenance. <br />In addition, an oil change pit and floor drains are located in the <br />bus garage. The floor drains reportedly drain out into a buried <br />drum with holes in it located near the building. It is possible that <br />hazardous chemicals have drained out into the subsurface of the <br />Site. The surficial solid waste area is considered a REC since it is <br />possible that a release of petroleum and/or hazardous substances <br />has occurred in the area. The fertilizer storage area and pesticide <br />storage, loading, and mixing area are considered RECs since it is <br />possible that chemicals are present in the soil in these areas due <br />to spillage over time. <br />9.0 DATA GAPS The bus maintenance garage is considered a REC since it was <br />locked during the Site reconnaissance and the interior was not <br />observed. <br />Phase I Environmental Site Assessment <br />16330 US Highway 10 NW, Elk River, Minnesota September 4, 2024 <br />Carlson McCain, Inc.iii