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16 October 2001 <br /> AGE-NC Project No. 01-0871 <br /> Page 4 of 4 <br /> • TPH-g was detected in three soil samples collected at depths of 20 feet, 25 feet and 30 feet <br /> bsg from probe boring P-3 at low concentrations. <br /> • Toluene(0.02 mg/kg),ethylbenzene(0.006 mg/kg)and xylenes(0.026 mg/kg)were detected <br /> in the soil sample collected at 30 feet bsg in boring P-3. <br /> • Lead concentrations in the soil analyzed fell within the background range for California soils <br /> and well below concentrations normally of regulatory concern. <br /> • The detected hydrocarbon concentrations generally increased with increasing depth in the <br /> three impacted samples; the vertical and horizontal extent of impacted soil is not known. <br /> • As the shallow samples (10 and 15 feet bsg) did not appear to be impacted and <br /> concentrations of hydrocarbons generally increased with depth in the 20 feet,25 feet and 30 <br /> feet samples, it is possible that the source of the contaminants may have been from the <br /> product line(s) or dispenser(s) rather than the UST. <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities. The findings were based mainly <br /> upon analytical results provided by an independent laboratory.Evaluations of the geologic conditions <br /> at the site for the purpose of this investigation are made from a limited number of available data <br /> points(i.e. soil samples)and subsurface conditions may vary away from these data points.No other <br /> warranty, expressed or implied, is made as to the professional recommendations contained in this <br /> report. <br /> Advanced GeoEnviron mental,Inc. <br />