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Chevron Products Company • <br />' , t Chevron Service Station #9-2033, West Charter Way Stockton CA Much 5 <br />■ Benzene was detected in seven groundwater samples at concentrations <br />ranging from 1.6 µg/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 µg/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 µg/L in the sample collected from SB -8 at <br />58 feet bgs to 1,400 µg/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 µg/L in the sample collected from SB -6 at 63 feet bgs to <br />8,200 µg/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 1.9 µg/L in the sample collected from SB -6 at 38 feet bgs to <br />280 µg/L in the sample collected from SB -8 at 35 feet bgs. <br />• EDB was detected in one groundwater sample at 0.69 µg/L in the sample <br />collected from SB -5 at 81 feet bgs. <br />• EtBE was detected in one groundwater sample at 4.2 µg/L in the sample <br />collected from SB -8 at 35 feet bgs. <br />■ TAME was detected in one groundwater sample at 1.8 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 µg/L in the sample collected from SB -6 at 63 feet bgs to 31 <br />µg/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 µg/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 is presented in Attachment E. Data suggest groundwater flows in the <br />shallow zone flows east of north at about 0.02 feet/foot. <br />I:\Chevron\92033\REPORTS\9-2033 SA CPP WPFA.dcc <br />