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After the depths to water were measured, selected wells (MW 1, MW8—MW 10, MW 12, <br /> MW13, RW1, RW3, RW4, P1—P2, IW1, and V2) were purged by vacuum truck and sampled <br /> At least one well casing volume and as much as three well casing volumes of purge water <br /> were removed from each well before purging was terminated After purging, groundwater <br /> samples were collected with disposable, factory-cleaned polyethylene bailers, which were <br />' triple-rinsed with deionized water prior to sample collection Groundwater samples were <br /> collected in 40-m1 VOA vials The vials were labeled and stored in an ice-filled cooler and <br /> transported under appropriate chain-of-custody procedures Groundwater samples, a <br /> field-prepared rinsate blank, and a laboratory-prepared trip blank were submitted to Curtis & <br /> Tompkins, Ltd , and analyzed for Total Petroleum Hydrocarbons as gasoline (TPH-g) by <br />' DHS-modified EPA Method 8015 and for benzene, toluene, ethylbenzene, and xylenes <br /> (BTEX) by EPA Method 8020 <br /> The analytical results for the samples collected on 1 November are presented in boldface type <br /> in Table 1, along with results of previous analyses The laboratory analytical report and <br /> chain-of-custody documentation are included as Appendix B <br /> Detectable concentrations of petroleum hydrocarbons ranged from 400 gg/L (MW 1) to <br /> 200,000 µg/L (V2) for TPH-g, and from 18 gg/L (P2) to 23,000 µg/L (V2) for benzene The <br /> concentration of TPH-g in the sample collected from MW8, located adjacent to the Shell <br /> service station and upgradient of the site, was 56,000 µg/L Groundwater sample analytical <br /> results are shown in Figure 1 <br /> The soil vapor extraction system and air sparging systems operated throughout most of the <br /> quarter Influent and effluent concentrations from monthly self-morutoring are shown in <br /> Table 2 <br /> 3. WORK PROPOSED FOR NEXT QUARTER <br /> Water elevations in groundwater monitoring wells will be measured and groundwater samples <br /> collected in February 1995 The samples will be analyzed for TPH-g and BTEX The soil <br /> vapor extraction and air sparging system will continue to be operated and its progress <br /> monitored <br /> i <br /> i <br /> 73942Q1194 2 2 <br />