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f <br /> October 13, 1987 AGS 87050-2 <br /> USA Station No. 65, Lodi, California <br /> o Sam n Procedure <br /> Twelve soil samples were collected and described from each <br /> borehole during drilling. These samples were collected at 5-foot <br /> intervals from the ground surface to the 60-foot depth. Soil <br /> samples were collected by advancing the boring to a point <br /> immediately above the sampling depth and then driving a <br /> i <br /> California-modified, split-spoon sampler (2-1/2-inch inside <br /> 4�9 <br /> diameter) into the soil through the hallow center of the auger. <br /> The sampler was driven 18 inches with a standard 140-pound hammer <br /> repeatedly dropped 30 inches. The number of blows to drive the <br /> sampler each 6-inch increment was counted and recorded to <br /> evaluate the relative consistency of soil materials. <br /> The samples.were removed from the sampler and were immediately <br /> ,# sealed in their brass sleeves with aluminum foil, plastic caps, <br /> .and airtight tape. They were then labeled and placed in iced <br /> .b� <br /> storage. , Soil that was collected from the deepest unsaturated <br /> sample interval was selected for laboratory analyses to evaluate <br /> potential gasoline-related contamination near the top of the <br /> saturated zone. One sample only per borehole was selected for <br /> analysis because the OVA readings of cuttings and samples were <br /> below background levels.. .The samples were delivered to. Brown and <br /> m <br /> Caldwell Laboratories of Emeryville, California for analytical. <br /> 8 <br /> AORIled.GL°OsySl"E/1TS <br />