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,� s xs+. � .r s� c � • .tri,',r' <br /> 8720033A-COT-4 'rld��ocaref•�Syde COnsuitanxs <br /> 3.0 PURPOSE AND SCOPE <br /> The purpose of this investigation was `inassess <br /> andthe <br /> groundwater incthe <br /> gasoline and gasoline components occur <br /> vicinity of the four underground gasoline sge tanks at dril]ed adjacent theShop <br /> 10. To accomplish this, four soil borings <br /> were <br /> cluster of tanks. One baring ws5 Placed on each side of the tank cluster <br /> in order to assess coil and water quality both up and down groundwater <br /> gradient. Groundwater monitoring wells in all the borings were <br /> accordancellected in with <br /> completed. Soil and groundwater samples were <br /> en <br /> recvironmentallaboratoryand <br /> contract specifications and submitted to <br /> J' independent 'he <br /> for analysis. This report describes the work <br /> an <br /> I indepe and summarizes the analytical results obtained by WCC to date. <br /> Pformed <br /> 4,0 FIELD ACTIVITIES <br /> WCC drilled four soil borings {5-1 through S-4) and installed Fanitor3ng <br /> The bo <br /> wells in the boreholes between August 25;28, 198�'advancedrinus9ngotions aatruck- <br /> are shown on the attached Figure 1.. Borings wQ <br /> ers to <br /> mounted Mobile B-51 drill equipped with 10-inch O.D. hollow-stem <br /> penetrated <br /> maximum <br /> maximum depths of 51.5 to 52.0 feetbelow <br /> gilt and s;ltyface•clay, faith lesser <br /> by drilling consisted primarily ey sand. Groundwater occurred at <br /> amounts of silt, sandy silt, <br /> tsand <br /> ang� ade <br /> depths between 42 and 43 feetbelowmeasured approximately two <br /> weeks after installation of the monitoring wells. <br /> Soil Sam lin Procedures <br /> Soil samples were collected at 5-foot depth interals during drilling. The <br /> logged and visually classified according to <br /> samples and auger cut.ings were <br /> stem by a WCC geologist. Logs of the <br /> ,.he Unified Soil Classification Sy <br /> t <br />