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scattered around the south central parking area. Stockpiles of <br /> limestone, nahcolite, and magnetite are present in several <br /> places. Miscellaneous trash is also present on the property as <br /> can by seen in Photographs 4 and 5. <br /> 1.2.2 Previous Site Use <br /> The site was used for approximately 20 years as a crushing and <br /> bagging facility. Previous processing activities at the site <br /> involved the production of limestone dust, magnetite dust, <br /> packwall aggregate, and nahcolite dust. <br /> This assessment also identified the following site information <br /> that is pertinent to a Phase I Environmental Site Assessment. <br /> Regulatory Records: A review was conducted of existing <br /> environmental regulatory actions associated with this <br /> site. There is one other property within 1 mi (1, 600 <br /> m) of the site, the Mid-Continent Resources coal <br /> loading facility, with potential regulatory concerns. <br /> However, it is not likely that these concerns will <br /> affect this site. <br /> Storage Tanks: Through interviews, it was determined <br /> that there are no underground storage tanks (USTs) and <br /> only one above ground storage tank (AST) on the site. <br /> This 250 gallon AST was found during the site survey <br /> and the contents of the tank were determined to be <br /> diesel fuel (Photographs 6 and 7) . <br /> Transformers: Through interviews and the site survey, <br /> it was determined that three transformers are present <br /> on the property (Photographs 8, 9, and 10) . The <br /> transformers have been tested for polychlorinated <br /> biphenyls (PCBs) and found to be below the 50 ppm limit <br /> that is allowable under the- Toxic Substances Control <br /> Act. <br /> Uncontrolled Waste Disposal: Crushing and bagging <br /> operations on site likely produced large quantities of <br /> fugitive dust, small amounts of waste oil, and shop <br /> waste. The dust was discharged through vents to the <br /> outside. The waste oil was in the form of compressor <br /> blowdown, processing equipment leakage, and vehicle <br /> leakage. Runoff from the oily compressor blowdown has <br /> apparently contaminated about 1200 square feet of <br /> surface soils. It is possible that during rainstorms <br /> and snowmelt runoff, some oil may have entered the <br /> surface water in a nearby irrigation ditch. At the time <br /> of the inspection the oil appeared to be very well <br /> soaked into the ground and relatively immobile. <br /> 4 <br />