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[ 1 <br /> enviros® <br /> i <br /> ® Ground water samples from Wells MW-1 through MW-5, RW-1, RW-2, <br /> and VEW-1 through VEW-4 contained MTBE concentrations ranging from <br /> ND to 560 ppb TPPH and BTEX were not detected Halogenated volatile <br /> organics were detected in Well VEW-3 A benzene/MTBE concentration <br /> map is presented on Plate 2 <br /> Quarterly Sampling <br /> Wells MW-1 through MW-5, RW-1, RW-2, and VEW-1 through VEW-4 were <br /> sampled and analyzed for Total Purgeable Petroleum Hydrocarbons quantitated as <br /> gasoline (TPPH) according to EPA Method 8015 (Modified), benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) and methyl-tertiary-butyl-ether (MTBE) <br /> according to EPA Method 8020 Ground water samples from Well VEW-3 were <br /> analyzed for halogenated volatile organics (HVOCs) according to EPA Method <br /> 8010 Additionally, a duplicate sample and an equipment blank were prepared and <br /> analyzed for quality control purposes <br /> All four vapor extraction wells contained sufficient water for sampling this quarter <br /> Ground water samples from Well VEW-3 contained 0 65 ppb chloroform, 3 1 ppb <br /> cis-l,2-dichloroethene, and 11 ppb trichloroethene <br /> Field monitoring data and chemical analytical data are summarized in Table 1 <br /> Blaine's quarterly ground water monitoring report is presented in Appendix A <br /> . A summary table has been prepared and submitted to SJCPHS for review and <br /> discussion with the RWQCB as to whether a case closure request should be <br /> submitted <br /> i <br /> 97369 2 <br />