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J. H. KLEINFELDER & ASSOCIATES <br /> File No. W-2008-1 <br /> 6: November 14, 1985 <br /> Page 2 <br /> Fs <br /> {:3 <br /> III. PURPOSE <br /> 4-y <br /> The purpose of this investigation was te assess whether gasoline products have <br /> impacted the local soil and/or ground water quality. To this end, one soil boring was <br /> placed over the site of the removed storage tank and was completed as :t monitoring <br /> well. During drilling, a Kleinfelder geologist classified the subsurface soils; collected <br /> the soil samples for subsequent analyses; screened samples in the field for semi-volatile <br /> hydrocarbons with a portable photoionizatior, detector (PID), and loEged the bore hole. <br /> IV. FIELD ACTIVITIES/OBSERVATIONS <br /> A Soil Borings. <br /> The location of the soil boring and the monitoring well installed in the same <br /> borehole is shown on Plate II. The borehole was drilled using a truck mounted <br /> mobile B-45 drill rig equipped with 6-inch hollow stem augers. The soils <br /> encountered during drilling consisted pe edominately of interbeds of sand and silty <br /> sand with some clayey sand. A description of the soils encountered is presented <br /> on Plate IV, the copy of the U.iified Soils Classification Syst^m (used to identity <br /> the soil) is included as Plate III. Ground water was encountered 47 feet below <br /> grade in clayey sand. All sampling equipment used during the investigation was <br /> thoroughly cleaned prior to each use to minimize cross contamination. <br /> B. Monitoring Well. <br /> groundwater monitoring well (MW-1) was ins�alled in the borehole at the <br /> completion of drilling and logging. The ground water well was completed with a <br /> 2-inch inside diameter flush threaded PVC pipe, with well screen sections <br /> perforated with 0.020 inch slots from 35 to 65 feet below the ground surface. <br /> The annular space was backfilled with #2 Monterey sand to approximately ore <br />