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r . �, <br /> May 12, 1998, <br /> Mr. Ron Rowe <br /> San Joaquin County Department of Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, 3`d Floor <br /> Stockton,California 95201-0388 <br /> Re: Addendum to Well Installation Report <br /> Shell Service Station <br /> 1071 North Main Street <br /> Manteca,California <br /> WIC#204-4728-0502 <br /> Cambria Project#240-0323-12, <br /> Dear Mr. Rowe: <br /> On behalf of Shell Oil Products Company(Shell), Cambria Environmental Technology,Inc. (Cambria) <br /> is submitting this addendum to Cambria's April 28, 1998 Well Installation Report, which includes the <br /> laboratory analyses of soil permeability to water. <br /> Selected soil samples from below the water table were analyzed for permeability to water by ASTM <br /> Method D-5084. Soil samples from 18.0-19.5 ft, 21.0-22.5 ft, 26.0-27.0 ft, and 29.5-30.0 ft from well <br /> MW-1,22.0-24.0 ft and 29.0-30.0 ft from well MW-2,and 22.0-23.5 ft and 31.5-33.0 ft from well MW-3 <br /> were selected. The results are summarized in Table 1. The laboratory analytical reports are included <br /> in Attachment A. <br /> CAMBRIA We look forward to continuing to work with you on.this project. Please call if you have any questions <br /> or comments. <br /> ENVIRONMENTAL <br /> TECHNOLOGY,INC. Sincerely, <br /> 114465THSTREET, Cambria Environmental Technology, Inc. <br /> SurrE B <br /> OAKLAND, Owen R• ch ,P.E. <br /> Project Engin er <br /> CA 94608 <br /> PH:(5Io)42o 0700 Attachments: A-Laboratory Analytical Report <br /> cc: A.E. (Alex)Perez, Shell Oil Products Company,P.O. Box 8080, Martinez,California 94553 <br /> Fax:(510)420-917D, <br /> GAMant 1071\Reports\1VIW-I,2,3 InstallationWddendum_Well_lnst.WPD <br />