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radicals, much the same way as peroxide. In situ decomposition of ozone , <br /> can also lead to beneficial oxygenation and biostimulation. Although F <br /> conventional air sparging was ruled out as a feasible remediation <br /> alternative for the site due to the inability to vapor extract in the vadose <br /> zone, air sparging itself would work for ozone injection if soil vapor r <br /> extraction is not required. In addition, since a gas is injected, it may be <br /> possible for some remediation to also take place in the vadose zone as <br /> well. <br /> l <br /> In-situ chemical oxidation, namely by ozone sparging, appears to be a } <br /> viable means of remediation for the site. This method would be much ' <br /> more cost effective than "pump and treat" and may also allow for <br /> remediation in the vadose zone in the source areas. <br /> k <br /> 10 . 0 SELECTION OF REMEDIATION TECHNOLOGY <br /> {' f <br /> Based ' on the available remediation options, ASE recommends ozone <br /> sparging as a remediation alternative for the site. This remediation <br /> alternative should allow for remediation in the water-bearing zone, and <br /> possibly may have some effect on remediation in the vadose—zone as well. 4 <br /> ASE recommends, assuming that the San Joaquin County PHS-EHD concurs <br /> with this selection, that a remedial action plan (RAP) bere ared <br /> P P <br /> presenting a specific design for an ozone sparging system. r <br />" 1 1 . 0 REPORT LIMITATIONS <br /> The results of this assessment represent conditions at the time of the soil <br /> and groundwater sampling, at the specific locations where the samples <br /> were collected, and for the specific parameters analyzed by the <br /> laboratory. <br /> I <br /> It does not fully characterize the site for contamination resulting from <br /> unknown sources, or for parameters not analyzed by the laboratory. All l <br /> of the laboratory work cited in this report was prepared under t h e G <br /> direction of an independent CAL-EPA certified laboratory. The <br /> i <br /> independent laboratory is solely responsible for the contents and ' <br /> conclusions of the chemical analysis data. 1 <br /> The pumping test in this report was prepared by H2O Geol of Livermore, <br /> California. H2O Geol is solely responsible foi- the contents a n d <br /> conclusions of the pump test report. <br />� Y <br /> 574 West ,Grant Line Road CAP -- January 2002 <br /> -20- <br />