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r <br /> unleaded gasoline tank, one 250 gallon used-oil tank, and two 500 <br /> gallon leaded gasoline tanks. A 55 gallon drum containing used- <br /> oil was also removed from the site (Figure 2) . <br /> In order to remove all of the associated contaminated soil, <br /> Warren E. Gomes Excavating, Inc . of Rio Vista on February 25, <br /> 19 8 7, c avated an area approximately 40 ft. by 40 ft. by 22 ft. , tAs <br /> eu <br /> (::!: <br />' deep. This excavation was centered in the area of the two 500 ��1shl <br /> gallon fuel tanks . The excavated material was left on site and <br /> covered with Visqueen. yvlb� <br /> p, ` o <br /> 'l�NO <br /> After reviewing the sampling results from the tank pull and <br /> the excavation procedures, San Joaquin County Environmental <br /> S <br /> Health Officials requested that confirmation samples from the <br /> base of the excavation be obtained. <br /> In order to confirm that the excavation is adequate, Condor <br />' proposes to install two soil borings in the former excavation <br /> (Figure 2) . A single soil sample will be taken from each boring <br />' from just below the backfill/native soil interface. The borings <br /> will be drilled with a 7 .75 inch O.D. hollow-stem continuous- <br /> flight auger equipped with a modified California split spoon <br />' sampler (See Attachment 1 for Condor's soil boring procedures) . <br /> am les will not be collected in the backfill of either borin . <br /> / � bbP e� 2 - <br /> LL <br /> is CONDOR <br />