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grg <br /> r? <br /> and free product recovered from this well are stored and <br /> separated in tanks next to the runoff detention pond in the <br /> r <br /> Southeast corner of the site. <br /> � 3 <br /> The dissolved volatile constituents in groundwater are separated <br /> through the use of <br /> an air stripper, following free product <br /> separation. The air stripped groundwater is then stored and <br /> recharged v+.a the runoff detention pond. <br /> I <br /> 4 HYDROGEOLOGY <br /> Characterization of the site began in early 198!' with the <br /> { <br /> installation of several monitoring wells and soil borings by IT <br /> Corporation. Definition ' <br /> and refinement of the extent of <br /> contamination and of hydrogeological characteristics below the <br /> property has progressed continually through early 1988. { <br /> Thirty three soil boring's, twenty seven completed as monitoring f <br /> } wells and.one. completed as a re r <br /> cavery well, were constructed at ! <br /> the site to. determine the extent and nature of petroleum. . <br /> q� k i <br /> hydrocarbon contamination. Each series of soil borings and I <br /> monitoring wells was constructed using approximately the sams <br /> . construction methods. A hollow stem auger was used to drill, to <br /> the .desired depth, and soil samples were collected at specified 1 <br /> "4 .. <br /> intervals. selected samples were analyzed in the lab for <br /> t <br /> wi <br /> Petroleum hydrocarbons, lead.-__grain_size-analysis,--porosity; and` <br /> - - <br /> R � .— permealaility, Details on soil borings and monitoring wells <br /> t � <br /> �r are included in Table A 1 and <br /> a ppendix A. i <br /> i xu a� <br /> y <br /> / _ <br /> a. � fi, :µwsiA�4Wu1w�+ <br /> aid <br /> 6 <br />