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' inorganic parameters. The results obtained on soil samples generally confirm earlier analyses at the site by Kennedy/Jenks/Chilton (1986) that several vola- tile and semi-volatile organic compounds are present in soils in contact with the oil. ' No volatile organic compounds were detected in the groundwater, and metals, where present, were within background range. Three semi-volatile organic com- pounds were detected at low concentrations only in the well located within the area where liquid oil is present. These results indicate that in addition to ' being relatively insoluble, the mobility of the dissolved oil constituents is extremely low. ' In addition to these specific analyses, Acute Aquatic 96-Hour LC50 Tests were performed on both soil and groundwater samples. In these tests, fathead ' minnows were placed in solutions containing varying concentrations of soil and groundwater for 96 hours. The lowest concentration which is lethal for 50% or ' more of the minnows is defined as the LC50. If the LC50 is less than 500 mg/l, the material classifies as toxic and hazardous. Values for the LC50 were ' greater than 1,000 mg/l for all soil and groundwater samples tested. Three lines of evidence suggest that the oil is highly insoluble in ground- water: 1) low concentrations of oil and grease in groundwater in direct contact with the oil; 2) absence of volatile organic compounds and only low con- centrations of semi-volatile organic compounds in groundwater samples; and 3) the results of Acute Aquatic 96-Hour LC50 Tests on both soil and groundwater. ' The results of the analytical program indicate that neither the oily soil nor the groundwater would be classified as hazardous according to California ' Department of Health Services regulatory criteria (California Administrative Code, Title 22, Division 4, Chapter 30, Article 11). 1 ' BFA9/AO