Laserfiche WebLink
1 <br />' Beacon Cardlock Station Number 610 SSB 92-1001-02 <br /> 3300 Waterloo Road Page 8 <br /> Stockton, California <br /> TABLE 5 <br /> DEPTH TO GROUND-WATER DATA <br /> Beacon Cardlock Station Number 610 <br /> 3300 Waterloo Road <br /> Stockton, California <br /> Well Head Depth to Ground-Water <br /> IF Monitoring Well Date Sampled Elevation Ground Water Elevation <br />' MW-5 4/01/93 2671 6730 -4059 <br /> MW-6 4/01/93 2707 6737 -4030 <br /> MW-7 4/01/93 2762 6756 -3994 <br />' 4.0 EVALUATION <br /> 1 Gasoline range hydrocarbons were detected in one soil sample collected from boring B-8 Chemical <br /> analyses of soil sample S-25-138 indicated xylene concentrations at 0 0059 mg/kg, slightly above the <br /> method detection limit of 0 005 mg/kg Additional soil samples collected at the depths of 40, 55, <br /> 65, and 70 feet in boring B-8 did not contain detectable concentrations of gasoline range <br /> hydrocarbons. <br /> Gasoline range hydrocarbons were detected in ground-water samples collected from monitoring well <br /> MW-5 on April 1, 1993 The MW-5 sample contained toluene and xylene concentrations at 0 60 <br />' ugh and 0 73 ug/1, respectively The concentrations indicated are slightly above the method <br /> detection limit of 0 50 ug/1 These trace amounts of analytes may have been caused by surface <br /> runoff from heavy rainfall penetrating the boring during well construction Due to the closeness <br /> of the concentrations to the method detection limit, and the anomalously low field conductivity <br /> measurement, monitoring well MW-5 was resampled on April 16, 1993 No detectable <br /> concentrations of gasoline range hydrocarbons were found in the ground-water resample. <br /> Additionally, field conductivity of the resampled ground water was consistent with the conductivity <br /> of the ground water from the other two wells <br /> SSB ENVIRONMENTAL CONSULTANTS, INC <br />