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a < <br /> KLEINFELDER <br /> 3 SOIL REMOVAL <br /> L <br /> 3.1 EXCAVATION OF SOIL <br /> Soil from the walls of the excavation was removed above the ground water <br /> surface with a backhoe. The walls of the excavation were extended from <br /> the dimensions of the. original tank excavation to areas where petroleum <br /> z <br /> hydrocarbons were indicated in the urssaturated soil. During the removal, <br /> s ? <br /> soil was continually screened with an organic vapor detector to provide a : <br /> ' qualitative assessment of contamination. Based on visual observations and f <br /> the , results of the field screening, the excavation continued in increments d <br /> FM <br /> until petroleum hydrocarbons were significantly reduced or arson—exa-5ta�it. <br /> : shows the limits <br /> } <br /> The Excavation Soil Pile Map (Plate. 3) of the <br /> Mi i <br /> excavation. The 'dash lines represent the incrementsby' which the <br /> w3 excavation was extended. <br /> All soil removed from the excavation was stockpiled on the site. Material <br /> ositive for petroleum hydrocarbons was stored <br /> which qualitatively` tested p <br /> 3 . on the. eastern side of the site and estimated to be apgroximately 300 to <br /> 9r. tibis soil was covered at the end of each field <br /> is <br /> 350 cubic yards (Plate 3). E <br /> t day with 4—mil thick plastic to reduce uncontrolled aeration, i <br /> k' ;J Soil which appeared to be clean was stockpiled separately in the southeast <br /> t, <br /> ! o 50 cubic <br /> corner of the site and is estimated to be approximately 30 ti <br /> yards (Plate 3). -- - - <br /> s '; 3.2 ,QUALITATIVE'FILED SCREENING <br /> it i <br /> �s To qualitatively . assess the soil remaining in the excavation .and the f <br /> jg. i <br /> t: excavated soil, a portable organic vapor detector was used to screen i <br /> t <br /> me <br /> 3 <br /> 102-88-638 r <br /> �r` <br />