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11 IT-1111#70q-)o [;1�n, I m ii ntiti�t iii it <br /> Kc iue(b it I L i5ihtli1N 1 i 1t K(hap i FLbl ie ire 2 , `_00, <br /> are summarized in Table 10 A copy of the groundwater laboratory analytical report is provided in <br /> Appendix F <br /> 4 3 4 Containerized Groundwater Disposal <br /> Purged groundwater generated during the pump test was containerized on-site in a 4,000-gallon Baker <br /> poly tank Approximately 2,919 total gallons of groundwater was purged from monitor wells MW-6C <br /> l and MW-3C during the pump tests On December 5, 2002, Integrated Waste Stream Management <br /> JJ (IWM) of Milpitas, California transported the waste water and Baker tank off-site to a Seaport <br /> Environmental disposal facility located in Redwood City, California A copy of the IWM Certificate of <br /> Disposal is provided in Appendix I <br /> 43 5 Pump Test Conclusion <br /> I� Given the results of the MW-6C pump test, it appears technically feasible to extract a large volume of <br /> groundwater for a sustained period from the aquifer as a method of remedial treatment The hydraulic <br /> conductivity values calculated from the pump test correlate with the reported subsurface sediment <br /> descriptions However, given the favorable results of the VE/AS test, WAS remediation is likely to be <br /> 1 more cost effective than groundwater extraction as a remedial option for this site <br /> 4 4 BIDFEASIBILITY ANALYSIS <br /> As discussed in Section 3 2, three soil samples collected during the well installation program were <br /> submitted to an analytical laboratory for a Level I Bioassay analysis The soil samples were collected <br /> from the VE well boring at depths of 20, 30, and 50 feet bgs Additionally, groundwater samples were <br /> collected from monitor wells MW-1C and MW-4B to aid in the biofeasibility analysis The objective of <br /> Ithe bioassay analysis was to determine if the current subsurface site conditions are toxic and/or <br /> conducive to indigenous bacteria and if enhanced bio-remediation is a technically feasible and cost- <br /> 1 effective method to remediate residual long-chain hydrocarbons present in the soil beneath the site The <br /> bioassay analysis was used to evaluate the presence and concentration of aerobic bacteria in the soil, the <br /> presence and quantity of soil bactena capable of degrading petroleum hydrocarbons, the concentration of <br /> available nutrients, and the concentrations of petroleum hydrocarbons at the sampling point relative to <br /> Il the bacteria populations <br /> 1 - 17 <br /> I_l <br />