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Y <br /> enviroso <br /> Quarterly Sampling <br /> Wells MW-1 through MW-5, RW-1, RW-2, and VEW-1 through VEW-4 were sampled <br /> and analyzed for Total Purgeable Petroleum Hydrocarbons quantitated as gasoline (TPPH) <br /> according to EPA Method 8015 (Modified), and benzene, toluene, ethylbenzene, and <br /> xylenes (BTEX) and methyl-tertiary-butyl-ether(MTBE) according to EPA Method 8020 <br /> Ground water samples from Well VEW-3 were also analyzed for halogenated volatile <br /> organics (HVOC's) according to EPA Method 8010 Additionally, a duplicate sample and <br /> an equipment blank were prepared and analyzed for quality control purposes <br /> All four vapor extraction wells contained sufficient water for sampling this quarter Well <br /> VEW-2 had a measured total depth of 22 58 feet below grade (fbg), while its total depth is <br /> approximately 30 fbg Some silting may have occurred in the well resulting in this <br /> difference TPPH and BTEX were not detected in the vapor extraction wells MTBE was <br /> not detected in Wells VEW-1 and VEW-3, and could not be determined in Wells VEW-2 <br /> and VEW-4 due to co-elution in analysis of the samples <br /> Analysis of Well VEW-3 for HVOC's identified the presence of chloroform, cis-1,2- <br /> dichloroethene, and trichloroethene We proposed sampling of all wells next quarter for <br /> HVOC's <br /> Preparation of a closure request will be put on hold pending further evaluation of the <br /> HVOC's <br /> Field monitoring data and chemical analytical data are summarized in Table 1 Blaine's <br /> quarterly ground water monitoring report is presented in Appendix A <br /> If you have any questions regarding the contents of this document, please call <br /> Sincerely, <br /> Enviros, Inc <br /> Matthew E Donohue <br /> Project Engineer �oQ�pfESS�py��f' <br /> n\ LUA, ya, <br /> Diane M Lundqui , P E <br /> Senior Engineer NO C46725 <br /> C46725 <br /> 97369 2 <br />