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to SJCEHD on May 14, 2002 in the March 2002 Subsurface Sue Investigatran <br />' report The report included the following highlights <br /> • Subsurface soils in the vicinity of the site were primarily comprised of <br /> silt and clay to at least 50 feet <br /> • Initial groundwater, situated in the clayey matrix, was typically <br /> observed at a depth of 30 to 35 feet Groundwater was slow to yield, <br /> but typically rose under confined pressure to about 23 to 25 feet <br />' • Groundwater flowed easterly at a gradient of about 0 0026 ft/ft <br /> BTEX concentrations in soil samples collected above the groundwater <br />' table were relatively low compared to those obtained below The <br /> higher BTEX concentrations in soil samples collected below the <br /> groundwater table may be a result of the contaminated groundwater <br /> present within their matrix <br /> • TPH-G concentrations in soil samples collected above the groundwater <br /> table were relatively high compared to those obtained below The <br /> BTEX concentrations that were present in the TPH-G-impacted soil <br /> samples appear to have degraded <br /> • The lateral extent of petroleum-impacted soil appeared to be narrowly <br /> confined in the vicinity of the former UST The vertical extent of <br /> impact was evaluated to be 50 to 55 feet <br /> + Oxygenate compounds have not been detected in any soil sample <br />' • BTEX and TPH-G concentrations in groundwater at the MW-2 <br /> location were relatively high <br />' • BTEX and TPH-G concentrations in groundwater at the MW-1, MW- <br /> 3, MW-4, and PH-8 locations were relatively low or were not detected <br /> • BTEX and TPH-G concentrations in groundwater at the PH-6 and PH- <br /> 7 locations may be a result of previous retail gasoline operations at the <br /> 1725 El Dorado Street property <br /> • Oxygenate compounds TBA, MTBE, and DIPE have been detected <br />' sporadically in groundwater samples <br /> 6 <br /> December 2004 <br /> Quarterly Groundwater Monitoring Report <br /> Earthgrams Baking Companies, Inc <br /> (Former Kilpatrick s Bakeries,Inc) <br /> 1717 South Center Street <br /> Stockton,CaliforniaPrepared for SARA LIFE BAKERY GROUP Prepared by Phdip Services Corp <br /> H\ENV162400132\121382EG\Projw$\Stocklon Center StVrivesi3panve and Quarterly ReportslQuarterly Report 12_2004 doc January 18 2005 <br />