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to SJCEHD on May 14, 2002 in the March 2002 Subsurface Site Investigation <br /> report The report included the following highlights <br /> ce soils in the vicinity of the site were primarily comprised of <br /> Subsurface y <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 /> S 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 /> April 2004 <br /> Quarterly Groundwater Monitoring Report <br /> Earthgrams Baking Companies,Inc <br /> (rormer Kilpatrick s Bakeries,Inc} <br /> 1717 South Center street <br /> Stockton California <br /> Prepared for SARA LEE BAKERY GROUP a Prepared by Philip Services Corp <br /> HlENV162a00k32N]2i382EGTroje ts�Stockwn-Center Sidnvesugatrve and Quarterly Reports\Quarterly Report 04_2007 duc January 18 2005 <br />