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'ad ff THE <br /> L A B OR A TOR I E S , INC . <br /> ANALYTICAL CHEMISTRY•ENVIRONMENTAL SERVICES <br /> GEOTECHNICAL ENGINEERING - DRILLING SERVICES <br /> CONSTRUCTION INSPECTION & MATERIALS TESTING <br /> September 20, 1996 A91701.01C <br /> Mr. Lloyd Gums <br /> 731 Birchwood Lane <br /> Lodi, California 95240 <br /> Subject: Supplemental Site Characterization <br /> Project: Cherokee Service Center <br /> 303 South Cherokee Lane <br /> Lodi, California <br /> Dear Mr. Gums: <br /> This report, a supplement to the Site Characterization Report (A91701.01B) dated January <br /> 15, 1996, provides an estimation of the mass and volume of residual petroleum product <br /> constituents (PPCs). The report also summarizes the sampling procedures, field <br /> observations and analytical results of soil samples collected at the above referenced project <br /> site on July 12, 1996. <br /> AUTHORIZATION AND PURPOSE <br /> The services provided by The Twining Laboratories, Inc. (Twining) were authorized by <br /> yourself with an Authorization-to-Proceed (TLP 3796-532), dated June 20, 1996. <br /> Twining conducted a site characterization for the project site in December, 1995 as reported <br /> in the Site Characterization Report (A91701.01B). This site characterization report was <br /> submitted to you and to the San Joaquin County Public Health Services (SJCPHS) on <br /> January 15, 1996. During a meeting on May 9, 1996, the SJCPHS requested: <br /> • An estimation of the mass and volume of residual PPCs in soil beneath the <br /> northwestern fuel dispenser island based on the findings from the previous <br /> work. <br /> • Acquisition and analyses of two samples to be collected from below the <br /> location of former samples collected at 5 feet below surface grade (BSG) <br /> from borings HA-8 and HA-10. <br /> This report provides the aforementioned requested items. <br /> CORPORATE OFFICE: MODESTO VISALIA BAKERSFIELD <br /> 2527 Fresno Street 4230 Kiernan Ave.Suite 105 2521 E.Valley Oaks Drive 3701 Pegasus Drive,Suite 124 <br /> Fresno,CA 93716 Modesto,CA 95256 Visalia,CA 93292-6710 Bakersfield,CA 93308 <br /> (209)268-7021 •Fax 268-7126 (209)545-1050-Fax 545-1147 (209)625-1712-Fax 625-1714 (805)393-5088-Fax 393-4643 <br />