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w � �w wt w w■� � w ■w ■w �w � �� t� <br /> Semiannual Groundwater Monitoring, Second Half 1993 January 27, 1994 <br /> Quik Stop Market No 120, Stockton, Califorma F7120,93 <br /> TABLE 1 <br /> CUMULATIVE RESULTS OF GROUNDWATER SAMPLING AND ANALYSES <br /> Ethyl- Total Well Depth to Groundwater <br /> Sample Date TPHd TPHg Benzene Toluene benzene Xylenes Elevation Water Elevation <br /> Number Sampled (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ft above MSL) (feet) (ft above MSL) <br /> MW-2 06/16/92 <50 <50 <0 50 <050 <0 50 <0 50 1174 4487 -3313 <br /> cont 12/21/92 <50 <50 <0 50 <0 50 <0 50 <0 50 4618 -3444 <br /> 05/03/93 <50 <50 <0 50 <0 50 <0 50 <0 50 4143 -2969 <br /> 06/18/93 <50 <50 <0 50 <0 50 <0 50 <0 50 4087 -2913 <br /> 12/17/93 <50 <50 <0 50 <0 50 <0 50 <0 50 4117 -2943 <br /> MW-3 08/06/90 120 <30 <0 30 <0 30 <0 30 <0 30 1128 4427 <br /> 12/06/90 52 110 32 86 38 11 4503 <br /> 03/05/91 <50 <50 <0 50 <0 50 <0 50 <0 50 4470 <br /> 04/30/91 <50 <50 <0 50 <0 50 <0 50 <0 50 4432 <br /> 06/05/91 <50 <50 <0 50 <0 50 <0 50 <0 50 4440 <br /> 09/11/91 <100 <50 <0 50 <0 50 <0 50 <0 50 4609 <br /> 12/18/91 <100 <50 <050 <050 <050 <050 4468 <br /> 06/16/92 <50 <50 <0 50 <0 50 <0 50 <0 50 4437 -33 09 <br /> 12/21/92 <50 <50 <0 50 <0 50 <0 50 <0 50 4572 -3444 <br /> 05/03/93 <50 <50 <0 50 <0 50 <0 50 <0 50 4089 -2961 <br /> 06/18/93 <50 <50 <0 50 <0 50 <0 50 <0 50 4034 -2906 <br /> 12/17/93 <50 <50 <050 <050 <050 <050 4069 -2941 <br /> TPHd Total petroleum hydrocarbons as diesel < Not detected above listed detection limit <br /> TPHg Total petroleum hydrocarbons as gasoline ft Feet <br /> ppb Parts per billion (ug/l) MSL Mean Sea Level <br /> Page 2 of 2 <br />