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TL 489-0589-02 <br /> Page 3 <br /> and Mesozoic metamorphic andV igneous rocks (Poland - and Evenson, , s <br /> 1966) . <br /> :In the Lodi area,. the sediments attain a thickness of <br /> approximately 10, 000 feet. The .deposits containing.- fresh ground <br /> waste- are largely unconsolidated silts and sands comprising river <br /> channel , flood plain and alluvial fan . deposits of Recent to k <br /> Pliocene Age. <br /> s The hydrogeology in the general vicinity of the site consists <br /> i <br /> of a .perched, unconfined; water table aquifer _(E.E. �Du Pont Co. , <br /> 1987) '. The shallow unconfined aquifer is underlain- by a weakly <br /> confined aquifer. Based on the Map of Lines of Equal Depth to <br /> Water;' in Wells published by the San Joaquin Count Flood <br /> q y Control <br /> and Water Conservation District for the Fall of 1988., depth to 1 <br /> groundwater in the area is approximately 50 feet below site grade <br /> (BSG) and groundwater ,flow direction is to the east. However, <br /> shallow groundwater 'flow is variable depending ongroundwater <br /> production well pumping within the local' vicinity. Shallow i <br /> '` a <br /> groundwater flow is generally from a northwestward to a I; <br /> southeastward direction as interpreted by Conoco Environmental <br /> Conservation, in, their June, 1987, report titled "Groundwater <br /> Contamination Assessment Report, Kayo 0.il. Company, Fast Gas <br /> Station, 800. E. Highway 12, Lodi, California" . <br /> o71e,71i �xLo7atoea.oPnc. <br /> Fresno Modesto Visalia Bakersfield <br />