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' TERN GEOLOGIC RESOURCES , INC EXECUTIVE SUMMARY Western Geologic Resources, Inc GR conducted a subsurface investigation near the � ) g location of former underground fuel storage tanks on the south side the Safeway Meat Packing Plant, 1111 Navy Drive in Stockton, Cahfornsa, m September and October 1989 Six boreholes were drilled from whych soil samples were collected for chemical analysis Groundwater was observed at 26 8 feet (ft) below grade One of the boreholes was completed as a 4-inch diameter groundwater monitor well, MW-4 Groundwater samples from well MW-4 and wells MW-1 through P ugh MW-3, installed by another consultant, were collected on 3 October 1989 I Total purgeable petroleum hydrocarbons (TPPH), characterized as diesel #2, were detected � onlym the soil samples from 25 ft to 25 5 ft below P grade in borings B-11, B-14, and B-15, located on y the west and south side of the former location of the underground tanks, at 28 ppm, 120 ppm, and 2400 ppm, respectively Aromatic hydrocarbons including benzene, toluene, ethylbenzene, and total xylenes (BTEX) were not detected in most of the soil samples analyzed However, BTEX concentrations of 0 007 ppm or less were detected m samples from 15 5 ft below grade in boring B-14, from 25 5 ft and ' 36 5 ft below grade m boring B-10 (MW-4), and 15 3 ft below grade in boring B-11 Groundwater samples collected from all four monitor wells contained no detectable ` concentrations of TPPH or BTEX Groundwater flow beneath the site on 3 October 1989 was in an east-southeast direction at a very shallow gradient of 0 1% A survey of Cahforma Department of Water Resource's well logs identified ten registered wells - within a one-half mile radius of the site and three additional wells possibly within one-half mile of the site None of these wells are known to occur within 1,000 ft of the site his 076R1DE9 WP f i - I�