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JLx--117 '23 1,:—N-- FkL7P9:TWININS LABS 2092687126 TO:4640138 nc7C pp��y��-� <br /> r :02 <br /> ,•✓ THE `.✓ <br /> IN <br /> LABORATORIES , INC <br /> ANALYTICAL CHEMISTRY-ENVIRONMENTAL SERVICES <br /> GEOTECHNICAL ENGINEERWG • DRILLING SERVICES <br /> CONSTRUCTION INSPECTION A MAYINUALS TESY1P� <br /> July la, 1996 A91701.01 <br /> Mr. I1oyd (Mums <br /> 731 Birchwood Lane <br /> Lodi, Cal hrni>ia 95240 <br /> Subject: Suppiimentaj Work Plan for <br /> Addftional Safi Assesmment <br /> Project: Cherokee Service Center <br /> 303 South Cherokee Lane <br /> Lodi, California <br /> Dear Mr. Gums: <br /> Tam Twining Laboratories, Yric. (Twining)is pleased to submit this Supplernental Work Plan for <br /> Additional Soil Assessment (Supplemental Work Plan) at the project site. Tams work plan <br /> supplarnertts our "Amerided Work Plan for Site Chmutexization..." (Amended Work Plan), <br /> dated March 10, 1995. The scope of the additional soil assessment described herein was <br /> verbally recommended and approved by the San Joaquin County Public Health Services - <br /> Environrimmul Health Division (SICPHS-F.HD) during our meeting of May 9, 1996- The <br /> Supplemental Work Plant provides details of field, laboratory, and reporting activities contained <br /> in our proposal TLP 3796-532(mvised), dated June 20, 1996. Your signiture of an <br /> Authorization to Proceed form (dated June 24, 1996) provided our authorization to perforin the <br /> proposed services. <br /> This Supplemental Work Plan includes a summary of the background issues which necessitated <br /> additional assessment and a description of the technical approach. This information is followed <br /> by details of our corresponding limitations. <br /> BACK ROt7NIC1 <br /> Twining conducted a site characterization for the project sate in December, 1995. The site <br /> chs wterizaiion report was submitted to you and the SJCPHS-EM on January 15, 1996. <br /> During a meeting on May 9, 1996, the SJCPHS requested more work at the project site Muse <br /> the they were not comfortable with the findings presented in the report pertaining to the vertical <br /> extent of penaleum product constituents (PPCs)at the location of sail boring H131-10 drilled near <br /> aha eastern dispenser island. It is our understanding that the SJPHS-PSD requires an additional <br /> sample be collected in the vicinity of sail boring FEB-10, deeper than 6 feet below surface grade <br /> (BSG). ne work scope described below is provided to address the above concerns. <br /> GURP0AM 9FM: Memo VWKI0 YAFkWZFWM <br /> 2.527 Frmo Sum 4230 Kiernan Ave.Suite 105 2521 E.Va <br />