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SAN FRANCISCO FRENCr_ ,READ,STOCKTON, CA SE(,—.( Project No. 50090-011-03 <br /> K. Background Information (e.g.,historical operations and environmental investigations): <br /> The site is a former Colombo/Toscana Bakery that was used by the SFFB to produce and distribute <br /> baked food products. In February 1994,two 4.000-gallon capacity underground storage tanks (USTs) <br /> were excavated and removed from the Site under the direction of SEMCO (Figure 2) Two soil <br /> samples collected and analyzed from the base of the west end of the UST excavation (13 feet depth) <br /> were reported to contain total petroleum hydrocarbons as gasoline(TPHg),toluene. ethylbenzene and <br /> xylenes at maximum concentrations of 6.300 milligrams per kilograms (mg/kg). 42 mg/kg 50 mg/kg <br /> and 310 mg/kg,respectively. Benzene was not reported above the laboratory detection limit for these <br /> two samples. Three soil samples collected and analyzed from the east end of the excavation and from <br /> beneath the former product lines were reported to contain low to nondetectable petroleum-hydrocarbon <br /> concentrations. <br /> HASFFMSTOCKTONUNCOLN2.14S -6- <br />