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p ."."u" i `fir x i..* �« � •. �-. -rx� r , a.R µ .�S`755" -c' �,� -T. LL�i"`�_ n'�' .,,�:. <br /> �''Sr_^ �. �� � r�, �a'•� .f"4,i-- .,r'�r'S� i �" �'�'?.2. �.. :r.�4. Fa,f..��.' .e.^='�-�"' .,t..� ` �-+'�,- ,eZ Y,�'� L.'< <br /> k,J <br /> w <br /> 1' <br /> Thrifty Oil Company StationPap <br /> No.172 SSB 91-1038e 9 9 <br /> 7657 Pacific Avcoue <br /> Swckwn,California <br /> TABLE 6 <br /> RESULTS OF LABORATORY ANALYSES <br /> OF GROUND-WATER SAMPLES <br /> COLIFORM <br /> filrifty Cil Company Station No. 172 <br /> "647 Pacific Avenue <br /> Stockton, California <br /> Concentration Detected (countllOO ml) <br /> Sample No. Coliforms Fecal Coliform <br /> W-56.63-MW3 >16 5.1 <br /> W-56.70-MW2 X2.2 ¢2.2 <br /> Results in milliliters per liter <br /> > = Greater tban the method d.tectitin limit <br /> = Less than the method detection limit <br /> 3.6 Ground-.Vater Gradient <br /> The elevation of the ground-water surface at each monitoring well was determined by subtracting <br /> the depth to ground water from the elevation of each well head. The gradient was determined <br /> from three points of elevation using graphical methods. Depth to ground-water data from June 5, <br /> 1991,was used to determine gradient. The ground-water elevations determined on June 5,1991, <br /> are presented in Table 7, <br /> TABLE 7 <br /> ELEVATION OF GROUND WATER <br /> Thrifty Oil Company Station No. 172 <br /> 7646 Pacific Avenue <br /> Stockton, California <br /> Depth to Ground-Water <br /> Monitoring Well # Date Ground Water Elevation <br /> MW-1 June 5, 1991 56.50 -44.03 <br /> MW-2 June 5, 1991 56.70 -44.10 <br /> MW-3 June 5, 1991 56.63 -44.19 <br /> LMW-4 June 5, 1991 57.63 -44.14 <br /> • ssB ENVIRONMENTAL CONSULTANTS, INC. <br />