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� f <br /> GROUND ZERO ANALYSIS, INC. <br /> 1714 Main Street <br /> Escalon, California 95320 <br /> Telephone: (209)838-9888 <br /> Facsimile: (209)838-9883 <br /> February 9, 2006 <br /> Mr. Robert McClellon <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202-2708 <br /> Subject: Results of Soil Pile Sampling and Notice of Additional Site Activities <br /> 23023 S. Santa Fe Road, San Joaquin County, CA <br /> APN 249-060-13 <br /> Dear Mr. McClellon: <br /> This letter report summarizes the waste characterization sampling performed at the subject site on <br /> September 30, 2005 and presents a brief workplan for additional excavation. A site vicinity map is <br /> presented in Figure 1. <br /> The sampling was conducted to determine if the soil and ash waste excavated from a shallow <br /> burn/debris pit in the central portion of the property requires disposal as hazardous waste. <br /> SITE ACTIVITIES <br /> On September 30, 2005, Mr. Anthony Scoma, an experienced Ground Zero Analysis, Inc. (Ground <br /> Zero)technician, supervised the excavation of shallow burn pit/debris pile in the central portion of the <br /> site (Figure 2). An estimated 110 tons of soil/ash/debris was excavated near a former residential <br /> building. The excavated materials was placed on and covered with plastic pending characterization <br /> through sampling and analysis. Mr. Scoma controlled fugitive dust emissions during excavation and <br /> stockpiling activities by wetting the excavation zone and stockpiled soil as necessary using a firehose <br /> spray nozzle connected to a water truck. Excavating equipment was operated by Mr. Peter Palomino, <br /> the property owner, or one of Mr. Palomino's employees. All persons involved in excavation and <br /> stockpiling activities were properly certified under 29CFRI910.120(e). <br /> The samples were collected in thin-walled brass cylinders. Approximately 3 inches of soil was <br /> removed from the immediate surface area where the sample was taken and the cylinder then pushed <br /> or pounded into the soil. No head space was present in the cylinder once the sample was collected. <br /> Latex gloves were worn during sampling to prevent cross contamination with other samples. The <br /> soil samples were quickly sealed in their brass sleeves with Teflon sheets and plastic caps and <br /> G:\GROUNDZE\Palomino\soilpilcresult2—wp.doc <br />