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JUN-21-1995 09:15 FROM GEOLOGICAL TECHNICS TO 4640138 P.02 <br /> Gwftg�d*knics I-=. <br /> 2601*nr Xwd <br /> %fndW4 Wfwnia 95351 <br /> (209153864211�6G+f S3d•58SL <br /> June 21,1995 <br /> Mr.Ron Rowe <br /> San Joaquin County Public Health Services <br /> Erwin mmental Health Division <br /> 445 San Joaquin Street <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Addendum to Wark Plan <br /> C 9c B Equipment <br /> 9474 West 11th Street,Tracy,California <br /> Dear Mr.Rowe: <br /> In respotue to our telephone conversation of June 21,1995 Geological Technics Inc.provides <br /> the following modifications to the June 15,1995 Monitoring Well Installation and Gmunoi pater <br /> Monitoring workplan The soil and grmnidwatex samples will be tested for BM,TPH as <br /> gasoline,ard'IPK as diesel. The laboratory methods and detection limits are as follows: <br /> Benmv,toluene,ethyibenzene and xylene(BTEX by EPA method 8020),gasoline range petroleum <br /> hydrocarbons,(TPHGasoline by EPA method 50'W/8015m),and diesel range petroleum <br /> hydrocarbons ffPH-Diesel by EPA method 3540/8015a0and total lead by EPA method AA 742a <br /> Wauz samples will be tested for MV(using EPA medwd 6112,TPH-Gasoline using EPA method <br /> 5030/8M5WmW TPH-Diesel using EPA ntedwd 3510/8015(m). The detection limits for these <br /> compounds in water are listed below. <br /> Detection Limits BTEX TPH-Gasoline TPH-Diesel Total Lead <br /> Water L) 1 0.3 1 50 1 50 <br /> SDil,(IAgM 1 3.0 1 1000 I 1,000 I 2,500 <br /> may, <br /> GEO�LLOOGICAALL�CS INC. <br /> I�- D�C.1 <br /> Geok>gwst <br /> cc; FrdnKodlo <br /> Beth Thayer <br /> TOTAL P.02 <br />