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Second Quarter 1993 Monitorung Report <br /> Coca-Cola Enterpnses-West <br /> Project No 54006 02 <br /> Page 3 <br />' as diesel (TPHD), and benzene, toluene, ethylbenzene, and total xylenes (BTEX) utilizing EPA <br /> methods 5030/8015/8020 <br />' Groundwater well purge and sample logs are provided in Appendix A <br /> RESULTS OF LABORATORY ANALYSES <br />' Water samples collected from wells MW-1, MW-2, and MW-6 were analyzed for TPHG, <br /> TPHD, and BTEX using modified EPA methods 5030/8015/8020. These results and cumulative <br /> results of laboratory analyses are summarized in Table 1. The Cham of Custody Record and <br />' laboratory analytical reports are included in Appendix B <br /> Results of this quarter's laboratory analyses of water samples from wells MW-1, MW-2, and <br />' MW-6 indicate the following <br /> • The concentration of benzene detected in well MW-1 decreased since the last monitoring <br /> episode The benzene concentration of 25 parts per billion (ppb) exceeded the State of <br /> California Department of Health Services Maximum Contaminant Level (MCL) for <br /> drinking water of 1 0 ppb The concentration of total xylenes detected in MW-1 <br /> remained at 3 2 ppb and is below the MCL of 1,750 ppb The toluene and ethylbenzene <br /> concentrations increased from nondetectable (<0 5 ppb) to 2 0 ppb and 0 69 ppb, <br /> respectively These concentrations are below the State Action Level (AL) of 100 ppb for <br />' toluene and the MCL of 680 ppb for ethylbenzene <br />' • In well MW-1, the concentration of TPHG decreased from 500 ppb to 61 ppb since the <br /> previous monitoring episode in March 1993 TPHD remained nondetectable <br />' • The concentration of benzene detected in well MW-2 decreased from 6 3 ppb to 3 2 ppb. <br /> The benzene concentration exceeded the MCL for drinking water of 1 ppb <br /> Concentrations of toluene, ethylbenzene, and xylenes increased since the last monitoring <br />' episode to 1 3 ppb, 0 54 ppb, and 2 3 ppb, respectively The toluene concentration was <br /> below the State AL of 100 ppb, the ethylbenzene concentration was below the MCL of <br /> 680 ppb, and the xylene concentration was below the MCL of 1,750 ppb <br />' • The concentration of TPHG in well MW-2 decreased from 130 ppb to nondetectable <br /> (<50 ppb) TPHD remained nondetectable <br /> • Concentrations of BTEX detected in well MW-6 increased since the last monitoring <br /> episode from nondetectable (<0 5 ppb) to 2 5 ppb, 3 7 ppb, 1 6 ppb, and 5 6 ppb, <br /> 2QMR1993 FNL <br />