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Geofogica(Technics Inco <br /> 2741 River Road <br /> Mo&uco,c4fo-w 95351 <br /> (209)538-64241Fax#538-5852 <br /> Report <br /> Soil and Groundwater Investigation <br /> George's Service <br /> 1600 Durham Ferry Rd. <br /> Tracy, California <br /> Project No 425 2 <br /> August 5, 1997 <br /> 1.0 INTRODUCTION <br /> The site, located at the intersection of Highway 33 and Durham Ferry Road, has been owned <br /> and operated by George and Mei Teranishi since the 1940's as a automobile repair facility <br />' and market Up till 1990, when the tanks were removed, gasoline was sold at the site <br /> The site has been undergoing site characterization work since 1995 by Dei Tech Geotechnical <br />�. Support Services A total of eight borings and 3 monitoring wells have been conducted on <br /> the site In summary, elevated levels of petroleum hydrocarbons have been detected on the <br /> northern and western sides of the property <br /> In January of 1997 Geological Technics Inc (GTI) contracted with Mr and Mrs Teramshi to <br /> provide additional site characterization work regarding the definition of the lateral and <br /> vertical extent of petroleum hydrocarbons in the soil and groundwater A work plan <br /> addendum for installation of six monitoring wells was submitted on January 20, 1997 and <br /> approved by Ms Mary Meays of San Joaquin County PHS/EHD on February 3, 1997 The <br /> installation of the six wells was conducted on April 29 & 30, 1997 <br /> 2.0 SCOPE OF INVESTIGATION <br /> In accordance with the approved work plan and for the purpose of further investigation of the <br /> lateral and vertical extent of soil and groundwater impacted with petroleum hydrocarbons, <br /> Geological Technics Inc installed five soil borings to ±22 feet below grade and one soil <br />