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1)� <br /> GROUND ZERO ANALYSIS INC. C(:,- 00 F% / <br /> 1714 Main Street LRECIEVED <br /> Escalon,California 95320-1927 <br /> Telephone (209)838-9888 MAY 2 4 2005 <br /> Facsimile (209)838-9883 <br /> EWRONWENT HEALTH <br /> PER IT/SEMACES <br /> May 23, 2005 <br /> Mr Martin Harris <br /> Tuff Boy Trailers <br /> 5151 Almondwood Drive <br /> Manteca, CA 95337 <br /> Subject Well Installation and First Quarter 2005 Groundwater Monitoring Report <br /> Tuff Boy Trailers, 5151 Almondwood Drive, Manteca, CA, Site Code 1424 <br /> Dear Mr Harris <br /> This letter report summarizes activities conducted at the subject site during the first quarter 2005, <br /> including additional subsurface drilling investigation and quarterly groundwater monitoring and <br /> sampling Figure I presents a map showing the location of the site <br /> BACKGROUND <br /> Site Description and Hydrogeologic Setting <br /> The project site, currently operating as metal fabrication facility, is located approximately 2 % miles <br /> south of Highway 120, and approximately 3 1/z miles south of downtown Manteca The site location <br /> is presented on Figure 1 The nearest natural drainage feature is Walthall Slough, located <br /> approximately 1 i/s 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 The ground surface in the site vicinity slopes gently to the southwest Shallow <br /> groundwater beneath the site occurs at a depth of approximately 5-7 5 feet below ground surface <br /> (bgs) <br /> Underground Storage Tank Removal <br /> The site previously utilized one 1,100-gallon UST for storage of unleaded gasoline (Figure 2) <br /> Jim Thorpe 011, Inc of Lodi, California removed the UST under permit from EHD and <br /> conducted minor soil excavation on February 5, 1999 According to Mr Rich Thorpe, less than <br /> 30 cubic yards of soil were excavated as part of the removal activities The excavated soil was <br /> stockpiled on site adjacent to the excavation Soil samples collected beneath the tank contained <br /> G 1GROUND71-1Tuf BoylReports\QMR120051[QM2005 doe <br />