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C,eolagiRt Technics
<br /> 1101 71"Street
<br /> Modesto,CA 95354
<br /> 209.522.4119 - _
<br /> 209.522.4227(fax) I CIE
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<br /> gtitageologicaltechnics.com �.1 l�It�IJ �L
<br /> September 22,2004 SEP 2 4 2004
<br /> Project No.: 425.2 ENVIRONMENT HEALTHPERMIT
<br /> Project Name: George's Service(Durham Ferry) /SERVICES
<br /> George and Mei Teranishi
<br /> 1,600 Durham Ferry Road
<br /> Tracy,CA 95376
<br /> RE: Work Plan Addendum: Pre Bench Scale/Pilot Testing
<br /> Location: George's Service Station, 1600 Dhurham Ferry Road,Tracy,CA
<br /> Dear Mr. &Mrs.Teranishi,
<br /> Geological Technics Inc. is pleased to present the Work Plan Addendum for Pre Bench Scale/Pilot Study Testing.
<br /> This will determine if the bench scale testing is needed or if it can be skipped and we could proceed directly to
<br /> the pilot study.
<br /> Soil and groundwater samples will be obtained as described in the work plan dated August 16, 2004. These
<br /> samples will be tested for the following type of analyses:
<br /> 1. CAM 17 Metals: antimony, arsenic, barium, beryllium, cadmium, chromium (1 11 and VI), cobalt, copper,
<br /> lead,mercury, molybdenum, nickel, selenium, silver,thallium,vanadium, and zinc.
<br /> 2. General Minerals: Nitrate, TKN, sulfate, total hardness, total alkalinity, Ca, Mg, Na, Fe, Mn, P, K,
<br /> hydroxide,carbonate,bicarbonate,and chloride.
<br /> 3. pH and EC.
<br /> 4. The soil will be screened for particle size using standard sieve analysis methods.
<br /> After the soil and water analysis from a certified lab is complete, the results will be submitted to Mr. Angus E.
<br /> McGrath,Principal Geochemist of SECOR International Incorporated for his evaluation. Mr. Angus will prepare
<br /> a report that will include an analysis of the metal concentrations, compilation of results from other studies,
<br /> comparison of those results to the soil data(George's Service soil data), and discussion of the factors limiting the
<br /> effectiveness of the chemical oxidation.
<br /> Geological Technics will submit a complete report within three weeks after receiving the report from SECOR
<br /> International Incorporated, which will include the required objectives. If you have any questions regarding this
<br /> addendum,please contact me at 209-522-4119.
<br /> Thank you:
<br /> " ' ,
<br /> Mandeep Singh
<br /> Project Engineer
<br /> Cc: Jim Barton—RWQCB
<br /> Nuel Henderson-SIC PHS/EDH
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