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Sierra-Pacific Grou dwater Consultants, Inc. Q R <br /> Geologists, Engineers, and Compliance Specialists <br /> February 7, 1997 <br /> ri <br /> Mr. W.T. Nickerson, Project Manager - <br /> Unocal, ERS <br /> 2000 Crow Canyon Place, Suite 400 c:) <br /> San Ramon, California 94583 <br /> Subject: Report of Construction, Low Permeability Liner/Cap Systems, Former PureGroBrea <br /> Facility, 1905 North Broadway Avenue, Stockton, California: Unocal Order/Contract No. <br /> 35682,AFE No. 825934095, Sierra-Pacific Project No. 94-055.03 <br /> Dear Mr. Nickerson: <br /> Sierra-Pacific Groundwater Consultants, Inc. is pleased to submit the subject report. This is the final report <br /> in this series, summarizing the construction of the low permeability liner/cap systems at the site. It was <br /> preceded by reports on the installation of MW-9, down-gradient from the site, and the abandonment of MW-4, <br /> which was located in the former south pond area of the facility. <br /> Thank you for this opportunity to be of service to Unocal. Please call if you have any questions or if we may <br /> be of further service to you. <br /> Sincerely, <br /> SIERRA-PACIFIC GROUNDWATER CONSULTANTS,INC. <br /> C�D C�_ _ <br /> Eric D. Chase, CEG <br /> Senior Engineering Geologist <br /> EDC/jb <br /> Enclosure <br /> C. Jan Wagoner, Unocal <br /> Wend W els <br /> (916)933-1468 <br /> 4911 Windplay Drive,Suite 4 EI Dorado Hills,California 95762 (916)933-3197 FAX <br />