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15 feet bgs had been reached. During the removal of the tanks at both <br /> sites, ground water was reported to be present in the excavations <br /> Apparently, the ground water that entered the tank excavations was <br /> the result of localized inducement of vertical ground water flow due <br /> to the creation of the pit during tank removal. This phenomenon is <br /> frequently encountered in excavations. This "perched" ground water <br /> was then encountered during the installation of the two monitoring <br /> well borings mentioned above (MW-5 and MW-2A <br /> Potentiometnc surface maps prepared individually for Sites #1 and <br /> #2 have consistently portrayed ground water flow directions toward <br /> the south-southwest. The individual data from both saes provide <br /> mutually supporting data interpretations. The apparent cause of the <br /> flow direction is the Stockton Deep Water Channel that lies <br /> immediately adjacent to the northern site property line. Tidally <br /> induced water level fluctuations in the channel appear to be the <br /> cause of slight-to-moderate variations in the ground water flow <br /> gradient. <br /> Ground water wells are a common source of potable water in the <br /> Great Valley geomorphic province. However, no water supply wells <br /> are located within a 2,000-foot radius of the West Weber sites. <br /> I <br /> 2-3 <br />