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Report on Soil and Ground-Water Evaluation September 11 1989 <br /> Proposed ARCO Station, Woodbridge, California AGS 39044-1 <br /> CONCLUSIONS <br /> Based on the information collected during this investigation we conclude that: <br /> o Hydrocarbon vapor in the soil is minor and exists in detectable <br /> levels only on the east,side of the property. <br /> o Hydrocarbon contamination in the soil, other than that suggested <br /> by the vapor, was detected at very low levels and only in the soil <br /> sample analyzed from the area where the former tanks were- <br /> reported to have been during past site usage. <br /> o Hydrocarbon contamination was not above detection limits in the <br /> ground-water samples collected from any monitoring wells. <br /> This report should be forwarded to Ms. Diane Hinson of the San Joaquin Local Health <br /> District, 1601 East Hazelton Avenue, Stockton, California 95205 ,and Mr. Gordon L. <br /> Boggs of the California Regional Water Quality Control Board, Central Valley Region, <br /> 3443 Routier Road, Sacramento, California 95827-3098. <br /> REFERENCES CITED <br /> California Department of Water Resources. 1988. Ground-Water Basins in California. <br /> Bulletin 118-80: <br /> California Division of Mines and Geology. 1966. Geologic> Map of California. San,Jose <br /> Sheet (1:250,000). <br /> Marchand, D.E. and A. Allwardt. 1977. Late Cenozoic Stratigraphic Units, Northeastern <br /> San Joaquin Valley, California. United States Geologic Survey Open-file Report <br /> No. 77-748. <br /> t <br /> 20 <br /> Applied GeoSystems <br />