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+ 12/02/2004 12:49 20952242 GEOLOGICAL TECHN* PAGE 02/0 <br /> GeatagicaeckKics lKr. <br /> 1101 7"'Stress <br /> Modesto,CA 95354 <br /> 209.522.4118 <br /> 209.522.4227(fax) <br /> gtl Q geologicaltechnics.00M <br /> December 02,2004 <br /> Project No: 425.2 <br /> Project Name: George's Service (Durham Ferry) <br /> George and Mai Teranishi <br /> 1600 Durham Ferry Road <br /> Tracy,CA 95376 <br /> RE: Work Plan Addendum describing the Pre Bench Scale/Pilot Testing <br /> Location: George's Service Station, 1600 Durham Ferry Road,Tracy, and CA <br /> Dear Mr. &Mrs. Teranishi, <br /> Geological Technics Inc. is pleased to submit the Work Plan Addendum describing the Bench <br /> Scale Test. Drilling and sample collection process for the Bench Scale Test is described below: <br /> • A borehole will be drilled using 6600 or equivalent direct push Geoprobe about 40 feet deep. <br /> • Soil and water samples will be taken approximately from 10 tol2 feet,20 to 22 feet,28 to 30 <br /> feet, and 38 to 40 feet(this will cover the Ozone injection target zones). Soil samples will be <br /> collected by continuous core method, and water samples will be collected by grab sample <br /> method. <br /> • All samples will he sent to Excel Chem Labs (certified lab)for analyses as described in the <br /> WPA dated September 22, 2004. <br /> • The, tt1 with neat cement and 4 %bentonite mix. <br /> R �t phalt. <br /> d + $e stored temporarily in 55 gallon DOT approved drums. <br /> t' st`d sa3 tl � 'be the ame as described in WP and WPA (dated August 16, 2004 <br /> M1 <br /> if ydt have anyquestions,please contact me at 209-522-4119. <br /> Thank you: <br /> t <br /> P <br /> Mandeep Sin h <br /> Project Engineer <br /> Null Inderson SJC PHS/EDH <br /> 3. A' <br /> is <br /> L <br />