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'. Table 1 <br /> 1 Cumulative Results of Groundwater Sampling and Analyses <br /> • Quik Stop Market No. 132 <br /> 2555 West Hammet-Lane <br /> Stockton, California <br /> Ethyl- Total Well Depth to Groundwater <br /> ' Date TPH-G Benzene Toluene benzene Xylenes MTBE CO2 Elevation Groundwater Elevation <br /> Sampled (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (mg/L) (ft above MSL) (feet) (ft above MSL) <br /> Well MW-6(Cont.) <br /> ' 06/08/98 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 7.95 -4.37 <br /> 09/22/98 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 9.46 -5.88 <br /> 12/03/98 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 9.69 -6.11 <br /> 03/17/99 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 9.10 -5.52 <br /> 06/07/99 <50 <0.5 <0.5 <0.5 <0.5 <5.0 NR 8.65 1 -5.07 <br /> Well MW-7 <br /> 12/21/92 <50 <0.50 <0.50 <0.50 <0.50 3.22 16.02 -12.8 <br /> 03/17/93 <50 <0.50 <0.50 <0.50 <0.50 13.3 -10.08 <br /> ' 06/18/93 <50 <0.50 <0.50 <0.50 <0.50 12.67 -9.45 <br /> 09/23/93 <50 <0.50 <0.50 <0.50 <0.50 13.75 -10.53 <br /> 12/17/93 <50 <0.50 <0.50 <0.50 <0.50 13.52 -10.3 <br /> 03/25/94 <50 <0.50 <0.50 <0.50 <0.50 13.25 -10.03 <br /> 06/21/94 <50 <0.50 <0.50 <0.50 <0.50 13.21 -9.99 <br /> 09/13/94 <50 <0.50 <0.50 <0.50 <0.50 13.65 -10.43 <br /> 12/09/94 <50 <0.50 <0.50 <0.50 <0.50 14.02 -10.8 <br /> ' 03/16/95 <50 <0.50 <0.50 <0.50 <0.50 I L6 -8.38 <br /> 06/22/95 <50 <0.50 <0.50 <0.50 <0.50 11.8 -8.58 <br /> 09/26/95 <50 <0.50 <0.50 <0.50 <0.50 740 12.65 -9.43 <br /> ' 12/21/95 <50 <0.50 <0.50 <0.50 <0.50 700 12.55 -9.33 <br /> 03/06/96 <50 <0.50 <0.50 <0.50 <0.50 <2.5 690 10.82 -7.6 <br /> 06/04/96 <50 <0.50 <0.50 <0.50 <0.50 <2.5 NR 10.57 -7.35 <br /> 09/17/96 <50 <0.50 <0.50 <0.50 <0.50 <2.5 NR 11.53 -8.31 <br /> 12/09/96 <50 <0.50 <0.50 <0.50 <0.50 <2.5 NR 11.42 -8.2 <br /> 02/11/97 <50 <0.50 <0.50 <0.50 <0.50 <2.5 NR 9 -5.78 <br /> 06/09/97 NR NR NR NR NR NR NR 9.87 -6.65 <br /> 09/03/97 NR NR NR NR NR NR NR 10.56 -7.34 <br /> 12/04/97 NR NR NR NR NR NR NR 10.84 -7.62 <br /> 03/10/98 NR NR NR NR NR NR NR 7.11 -3.89 <br /> ' 06/08/98 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 7.73 -4.51 <br /> 09/22/98 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 9.28 -6.06 <br /> 12/03/98 <50 <0.5 <0.5 <0.5 <0.5 <5 NR 9.42 -6.20 <br /> 03/17/99 <50 <0.5 0.56 <0.5 1.1 <5 NR 8.83 -5.61 <br /> ' 06/07/99 <50 <0.5 <0.5 <0.5 <0.5 <5.0 1 NR 8.55 -5.33 <br /> Notes: <br /> ' TPH-G denotes total petroleum hydrocarbons as gasoline <br /> MTBE denotes methyl-tent-butyl ether;from 12-3-98 MTBE analyses were performed by EPA Method 8260 <br /> R denotes analysis not requested. NA denotes not available <br /> ' ug/L denotes micrograms per liter, mg/L denotes milligrams per liter <br /> <denotes not detected above listed detection limit for the method <br /> ft denotes feet <br /> 1 MSL denotes mean sea level <br /> • CO2 denotes carbon dioxide <br /> ' y%\LEHRMANIQUIKSTOP1132NGw ampkTABL.E I Page 6 of 6 <br />