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'" 4 <br /> P xl <br /> May 10, 1987 AGS 86103-2 <br /> Cardlock Station #27 - Stockton, California <br /> r „a <br /> f: <br /> 1 V SOIL SAMPLING: <br /> � Fifty soil samples were collected and described at the time of <br /> v drilling of the monitoring wells with a modified California <br /> split--spoon sampler. These samples, as identified on the Boring <br /> Logs, were collected at five-foot intervals from the ground <br /> SI �T; surface to total depth of the borings. <br /> Soil samples were collected by advancing the boring to a point <br /> i, <br /> immediately above the sampling depth, and then driving the <br /> S sampler into the native soil. The sampler was driven 12 to 18 <br /> inches with a standard 140 pound hammer dropped 30 inches. The <br /> w <br /> Yrl a <br /> number of blows required to drive the sampler each successive six <br /> �rV <br /> inches was counted and recorded as an indication of soil material <br /> consistency. <br /> �sr <br /> � a R <br /> Descriptions of earth materials encountered in the borings are <br /> presented in the Boring Logs, Plates P-5 through P-16. Plate P-4 <br /> •2 gives a summary of the Unified Soil Classification System used to <br /> identify the soils. Soil samples were subjectively analyzed for <br /> presence of hydrocarbon odor prior to preparation for transport <br /> "r to the laboratory. None of the samples from the borings showed <br /> '- <br /> K • n <br /> 4 <br /> All '&Q01099S <br /> .4ov/1Rd r~9V_stR1ss <br />