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to SJCEHD on May 14, 20021n the March 2002 Subsurface Site Investigation >r report The report included the following highlights ' • Subsurface soils in the vicinity of the site were primarily comprised of silt and clay to at least 50 feet ' • Initial groundwater, situated in the clayey matrix, was typically observed at a depth of 30 to 35 feet Groundwater was slow to yield, but typically rose under confined pressure to about 23 to 25 feet • Groundwater flowed easterly at a gradient of about 0 0026 ft/ft • BTEX concentrations in soil samples collected above the groundwater table were relatively low compared to those obtained below The higher BTEX concentrations in soil samples collected below the groundwater table may be a result of the contaminated groundwater present within their matrix • TPH-G concentrations in soil samples collected above the groundwater table were relatively high compared to those obtained below The ' BTEX concentrations that were present In the TPH-G-impacted soil samples appear to have degraded • The lateral extent of petroleum-impacted soil appeared to be narrowly confined in the vicinity of the former UST The vertical extent of impact was evaluated to be 50 to 55 feet ' • Oxygenate compounds have not been detected 1n any soil sample ' • BTEX and TPH-G concentrations in groundwater at the MW-2 location were relatively high • BTEX and TPH-G concentrations 1n groundwater at the MW-1, MW- 3, MW-4, and PH-8 locations were relatively low or were not detected ' • BTEX and TPH-G concentrations in groundwater at the PH-6 and PH- 7 locations may be a result of previous retail gasoline operations at the 1725 El Dorado Street property ' • Oxygenate compounds TBA, MTBE, and DIPE have been detected sporadically in groundwater samples 6 August 2004 Quarterly Groundwater Monitoring Report Earthgratns Baking Companies,Inc {Former Kilpatrick's Bakeries,Inc} 1717 South Center Street Stockton,California Prepared for SARA LEE BAKERY GROUP Prepared by Philip Services Corp H 1EW6240013ZI21382EG\Projects\Stocktan-Center St\]nvestigauve and Quarterly Reports\Quarterly Report 10_2004 doe January 18,2005