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f � - <br /> ��� GROUND ZERO ANALYSIS, INC. ti <br /> 1714 Main Street 1 <br /> Fscalon,California 95320 <br /> Telephone (209)838-9888 <br /> Facsimile (209)838-9883 <br /> Apn1 18, 2001 <br /> Mr Martin Harris <br /> Tuff Boy Trailers <br /> 5151 Almondwood Drive <br /> Manteca, CA 95337 <br /> Subject Groundwater Monitoring Well Installation Report <br /> Tuff Boy Trailers, 5151 Almondwood Drive, Manteca, CA <br /> Dear Mr Hams <br /> Ground Zero Analysis, Inc (Ground Zero) prepared this report on behalf of Tuff Boy Trailers to <br /> summarize the installation of four groundwater monitoring wells and to present analytical results of soil <br /> and groundwater samples collected during the investigation The work was conducted at the request <br /> of the San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) to <br /> further evaluate the nature and extent of soil and groundwater contamination associated with a former <br /> underground storage tank(UST) <br /> 1.0 SITE BACKGROUND <br /> 1.1 Site Description and Hydrogeologic Setting <br /> The project site, currently operated as a metal fabrication facility, is located approximately 2 1/2 miles <br /> south of Highway 120, and approximately 3 1/2 rrules south of downtown Manteca A site location <br /> map is presented on Figure 1 The nearest natural drainage feature is Walthall Slough, located <br /> approximately 1 1/8 mile southwest of the property Predominant land use in the site vicinity is <br /> agricultural and rural residential The elevation of the ground surface at the site is approximately 25 <br /> feet above sea level, and the ground surface slopes gently to the southwest Shallow groundwater <br /> beneath the site occurs at a depth of approximately 7-10 feet below ground surface(bgs) <br /> 1.2 Underground Storage Tank Removal <br /> The site previously utilized one 1,100-gallon UST for storage of unleaded gasoline (Figure 2) <br /> The UST was removed under permit from PHS/EHD on February 5, 1999 Soil samples <br /> collected beneath the tank contained ethylbenzene and total xylenes at levels exceeding the <br /> .} respective laboratory detection limits Analytical results of soil samples collected from beneath the <br /> former UST are summarized in Table 1 <br /> G IData1GROL)NDZE1Tuf l3oylRePorts\WELLRPT doc <br />