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2,0 MONITOR WELL INSTALLATION AND SOIL SAMPLING <br /> On July 11, 1996, Charles Fry, a registered geologist and V&W Drilling, Inc , arrived <br /> at the U S Chemical facility located at 1448 Shaw Road in Stockton, California, to install <br /> monitor wells MW-10 and MW-11 Mr Don Light from DEL-TECH Geotechnical was also <br />' present to provide assistance Prior to initiating drilling, monitor well MW-3 was gauged to <br /> determine the groundwater elevation to ensure the proper selection of the screened interval. <br /> Monitor well MW-11 was augered to a total depth of 70 feet below the surface, and soil <br />' samples were obtained for analysis from 40 to 41 5, 55 to 56 5, and 60 to 615 feet. All <br /> samples were screened with a photoionization detector (PID) in the field and no values above <br /> 1 background were measured A sweet odor was noted in the soil from approximately 20 feet to <br /> 50 feet below the surface Groundwater was initially noted in the boring at a depth of <br /> approximately 60 feet. <br /> Soil samples were properly packaged and stored on ice for transportation and subsequent <br />' analysis for benzene, toluene, ethylbenzene, and xylenes (BTEX), methyl tertiary butyl ether <br /> (MTBE), and total petroleum hydrocarbons (TPH)-gasoline Mr. Michael Infurna from the San <br /> Joaquin County PHS/EHD was present to witness the installation, sand packing, sealing, and <br /> grouting of the well <br /> The litholo was predominantly reddish-brown clay to a depth of 20 feet, which then <br /> gY P Y Y <br />' graded to a 10-foot interval with silt. The remainder of the borehole, to the total depth of the <br /> boring, which was 70 feet, was reddish-brown clay with varying amounts of silt As previously <br />' noted, groundwater was detected at a depth of approximately 60 feet and there were no field <br /> hydrocarbon readings above background <br /> 1 <br /> 2 <br />