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�r <br /> 1,3 LOCAL HYDROGEOLOGY AND WATER USE <br /> The hydrogeology beneath the site is consistent with general hydmSeology In the Stockton <br /> Arm The geology consists of n thick sequence of continental alluvial fan,river channel, <br /> and flood plain deposits. These deposits are composed of interfingcring layers of gravels, <br /> sands,silts,and clays(USGS 1972). Fresh ground waira is Abundant in unconsolidated <br /> vAmcnts(DWR 1967)and is recharged fror:r}he Sierra Nevada mountains to the cast. <br /> Relatively saline waters recharge and intrude upon the better quality aquifers from the Coast <br /> Ranges and deltas in the west. The layers of unconsolidated sedir-tws differ widely In <br /> thickness and txtcnL This geologic hcmmgeneity complicata the'occurrence and depth of <br /> ground water(Figure 3). <br /> 71C site overlies an old dough that eaaend:d along the north We of Harding Way. <br /> Apparently the slough was bacif lld to allow Harding Way to be widened into a four-lane <br /> mad. The ne at A.-face water now is Yosenihe Lakc at the east end of Smith Canal, <br /> approximately one tails west of former Chevron SS 9-191$. Tire sleep water channel or the <br /> San Joaquin River Is less than a mile south of the site. <br /> A search of else California Department of Water Resources's records revealed seven wells <br /> within a half milt radius of the site(fable I and Fig,=1). A nxn%;Kclfic site surety of <br /> these wells to ascertain thcirprewt.use is yet to be accomplished. <br /> i <br /> Z <br />