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i <br /> prepared by GeoAudlt (Appendix A), groundwater and soil vapors have been monitored for <br /> biological activity Soil borings were drilled and sampled on November 15 and 16, 1994, to <br /> monitor bacteriological progress in the impacted soil <br /> 3 11 Groundwater Monitoring for Biological Activity <br /> Groundwater samples were collected from selected wells on October 17, November 16, <br /> December 7 and December 19, 1994, to monitor biological activity (see Appendix B) <br /> Samples were collected for the measurement or analysis of dissolved oxygen, pH, electrical <br /> Iconductivity (EC), total bacteria, bacterial composition (number of inoculated hydrocarbon <br /> degraders) and coliform Table I summarizes the results of groundwater monitoring for <br /> biological activity through December 7, 1994 The bacteriological laboratory report is <br /> included in Appendix B (the specific bacteiial species encountered are presented in the <br /> report) <br /> 3.12 Soil Vapor Monitoring <br /> The soil vapor system consists of seven remediation wells (VW-1 through VW-7), five <br /> monitoring wells, which are currently dry (MW-1 through MW-5), and MW-14 A low- <br /> pressure blower continues to provide oxygen (air) to all wells on the soil vapor system except <br /> MW-1 and MW-2 <br /> Oxygen, caibon dioxide and organic vapors were measured twice each month using field <br /> instruirients Percent oxygen and carbon dioxide were measui ed using a GasTecli 350 <br /> O,/CO,analyzer, organic vapors weie measuied using aThermo Environmental 5$0A photo- <br /> ionization detector <br />' After full-scale inoculation, samples were collected from each monitoring point after the well <br /> had been puiged for approximately thiee to five minutes Each well was purged using an <br />' electric pump Air is then drawn through the field instrument and the measurement is <br /> recorded after stabilization The results of the vapor monitoiing are included in Table 2 <br />' On October 10, 1994, vapor samples were collected for laboratory analysis Samples were <br /> collected from VW-1 through VW-7 as well as dry monitoiing wells MW-3 and MW-4 <br /> Samples were collected in Tedlar bags and transported under chain-of-custody to Pace Inc <br />' in Camarillo, Califoinia Each sample was analyzed for methane, oxygen, caibon dioxide <br /> and nitiogen <br />' 3.1.3 Soil Boring Drilling and Sampling <br /> Four soil borings weie drilled at the site on November 15 and 16, 1994 Thiee of the <br />' borings (P-3, P-4 and P-5) were dialled within the known impacted soil area The fourth <br /> boring (1313-1) was dialled outside the known impacted soil area to obtain backgiound data <br /> 1 <br /> G<olgxal Audt Se rvaeInc 3 <br /> Q=. X Rcpunll2"A 33 GEwOM6 <br />