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Chevron Products Company 3 <br /> Chevron Service Station#9-2033,506 West Charter Way Stockton CA March 5,2002 <br /> ■ Benzene was detected in seven groundwater samples at concentrations <br /> . ranging from 16 pg/L in the sample collected from SB-8 at 35 feet bgs to <br /> 6,900 gg/L in the sample collected from SB-5 at 42 feet bgs <br /> ■ Toluene was detected In five groundwater samples at concentrations ranging <br /> from 4 5 gg/L in the sample collected from SB-6 at 63 feet bgs to 16,000 In <br /> the sample collected from SB-5 at 42 feet bgs <br /> ■ Ethylbenzene was detected in six of the groundwater samples at <br /> concentrations ranging from 0 93 gg/L in the sample collected from SB-8 at <br /> 58 feet bgs to 1,400 gg/L in the sample collected from SB-5 at 42 feet bgs <br /> ■ Xylenes were detected in five of the groundwater samples at concentrations <br /> ranging from 8 1 gg/L in the sample collected from SB-6 at 63 feet bgs to <br /> 8,200 gg/L in the sample collected from SB-5 at 42 feet bgs <br /> ■ MtBE was detected in three of the groundwater samples at concentrations <br /> ranging from 19 pg/L in the sample collected from SB-6 at 38 feet bgs to <br /> 280 gg/L in the sample collected from SB-8 at 35 feet bgs <br /> ■ EDB was detected in one groundwater sample at 0 69 gg/L in the sample <br /> • collected from SB-5 at 81 feet bgs <br /> ■ EtBE was detected in one groundwater sample at 4 2 gg/L in the sample <br /> collected from SB-8 at 35 feet bgs <br /> ■ TAME was detected in one groundwater sample at 18 gg/L in the sample <br /> collected from SB-8 at 35 feet bgs <br /> ■ TBA was detected in four of the groundwater samples at concentrations <br /> ranging from 8 2 gg/L in the sample collected from SB-6 at 63 feet bgs to 31 <br /> gg/L in the sample collected from SB-7 at 58 feet bgs <br /> ■ 1,2 DCA was detected in three of the groundwater samples at concentrations <br /> ranging from 0 81 gg/L in the sample collected from SB-6 at 38 feet bgs to <br /> 18 gg/L in the sample collected from SB-8 at 35 feet bgs <br /> Table 1 provides a summary of discrete groundwater sample analytical results <br /> • Routine Groundwater Monitoring. Groundwater levels and water quality data <br /> collected quarterly from existing groundwater monitoring wells MW-1 through <br /> MW-3 1s presented in Attachment E Data suggest groundwater flows in the <br /> shallow zone flows east of north at about 0 02 feettfoot <br /> 11Chevron192033\REPORTSI9-2033 SA CPT wPFA doe <br />