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• <br /> TreadvvelI&WIo <br /> subcontracted Granite Construction,who in turn subcontracted Modesto Sand & Gravel to <br /> demolish the former Jimmy's Tire Shop building and remove the paved parking lot and concrete <br /> pit The demolition permit is provided in Appendix D <br /> ' Mr Frank Grande of Granite Construction was the project manager for the West Grant Line <br /> Road widening project To his knowledge, there was no underground storage tank and no <br /> ' contamination encountered during the removal of the foundation(Grande, 2003) According to <br /> Ms Debbie Jones of Modesto Sand & Gravel, there were no documented hoists, drums, tanks, or <br /> any contamination found during the demolition of the building (Jones, 2003) In addition, there <br /> were no wells or septic tanks present at the Site (Jones, 2003) According to Mr Paul Verma of <br /> ' the City of Tracy, the project construction manager, an asbestos and lead survey was performed <br /> ' prior to demolition There was apparently no asbestos or lead found during the survey(Jones, <br /> 2003) <br /> jibMr Jeff Mason of the City of Tracy Fire Department was contacted for environmental <br /> information regarding the Site The Fire Department did not have a file for the Site and to his <br /> knowledge there were no underground storage tanks (Mason, 2003) <br /> ' 2.2 Site Contamination <br /> Groundwater contamination at the Site was initially suspected(via petroleum odors) during the <br /> geotechnical investigation performed by the San Joaquin Company for a proposed building in <br /> 1999 (SJC, 1999) A preliminary subsurface investigation was performed at the Site and <br /> reported in August 2000 by Advanced GeoEnvironmental, Inc (AGE) Six direct-push borings, <br /> designated B-1 to B-6, were drilled at the Site as shown on Figure 2 The AGE reportis <br /> provided in Appendix F <br /> The Site and surrounding area are situated on the distal, northern slope of an alluvial fan <br /> ' (SJC, 1996) The underlying alluvial sediments are Quaternary to Recent in age and typically <br /> consist of silty clay, sandy clays, sands and gravels (SJC, 1999) The regional flow direction is <br /> 1 <br /> Site Assessment Report 5 21 May 2003 <br /> TREADWELL&ROLLO,INC <br />