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Philip Cohn Property Phase I Investigation Report ' Page 3 ' The soil samples were obtained using i California Modified Split Spoon sampler with brass liners The sampler was driven by a WO pound hammer repeatedly falling 30 inches The blow counts necessary to drive the sampler was recorded for each 6-inch interval to help evaluate the consistencies of the materials The laboratory samples did not have head space and were immediately sealed in ' their liners using plastic caps Remaining samples were used for geologic logging of the baring 1 Soil samples were collected at tive toot intervals for geological interpretation, PID screening, and laboratory analysis (5 samples analyzed) All soil samples were delivered, under chain of custody, to an analytical laboratory licensed by the State of California for hazardous materials work The samples were analyzed for Total Petroleum Hydrocarbons (gasoline) and BTX&E (Benzene, Toluene iXylene, and Ethyl Ben7enk) and EPA Method 8260 for cho Ox, gen sled Compounds ' All rinse water was contained and removeci by the driller and drill cutti igs wt rc containerized on plastic and covered Disposal of the drill cutting, is the ie responsibility of the property owner l 3.0 SOIL CONDI'T'IONS ' Soil conditions at the site were explored to a maximum depth of 71 5 ft , which was the depth limit of the drilling equipment mobilized to the site The ground water table ' (reportedly at 90 to 100 ft depth) was not enco.antered nor were perched water zones encountered in this boring ' Soils stratigraphy beneath the cite is typical of 'tie Stockton area The Ittholow is dominated by clays and silts which were deposited dui ing the time that the Central Valley was dominated by shallow lacustrine environments Fine ;rained sand units were ' encountered from 14 to 16 ft depth and from ') 5 to 66 5 ft depths The sands were deposited in the distal portions of alluvial fan,,'deltas which encroached into the lacustrine environments during times of high erosion iii the Sierra Nlevada highlands (source area) Permeability of the soils to water at this site can be e�pecteci to be minor this is due to the very fine grained nature of the soils which underlie the site 3 1 Soils Contamination ' The first indications of contamination in the samples wilected dunou the drilling were detected at 15 ft depth (slight hydrocarbon oder► fnspectior of nie lanoratory ' analyses shows that the clay/silt unit that directly underlics the tank area at the site