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To address the dissolved hydrocarbon plume, Thrifty has evaluated other methods including <br /> ozone sparging. Based on recent success with ozone sparging at multiple locations in Southern <br /> California and given the clayey sand lithology at this site in the saturated zone in the area of well <br /> MW-11, Thrifty believes that ozone sparging will be effective at this site. If you agree in <br /> principle with the implementation of ozone sparging at this site, Thrifty will prepare and submit a <br /> workplan to perform ozone sparging pilot testing within two weeks of your approval to proceed. <br /> If you have any questions or comments,please contact Michael Bowery or me at(562)921-3581 ext. <br /> 404 or x390. <br /> Sincerely, <br /> Chris Panaitescu <br /> General Manager <br /> Environmental Affairs <br /> cc: Ms. Liz Sewell <br /> Tosco Marketing Company <br /> 76 Broadway <br /> Sacramento, CA 95818 <br /> File <br />