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r <br /> � Sheen screening involves placing soil in wata and observing the water surface for signs of <br /> I shcea. Sheen clacsifications aze as follows: <br /> No Sheen (NS) No visible s6eea on water surface. <br /> Slight S6eea (SS) Lig6t, colodess, dull sheea; spread is irregulu, oot <br /> Irapid; are,ag of no shcea remain; s6eea disaipatee capidly. <br /> Moderate Sheen (MS) Light to heavy s6cen, may have some color/iridescmce; <br /> I spread is irregular to flowing; few reanaining aroas of no <br /> sLeea on water surface. <br /> Heavy Shaen (HS) Havy sheca with color/iridesceace;spread is npid;moat . <br /> fof wazer surface is covered with sheen. <br /> I Headspace vapor screeaing involves placing a soil sample in a plasdc aample baQ. Air is <br /> � captured in the bag and ffie bag is a6aken w expose the soil to the air trapped in the b�. '!be <br /> � probe of a Bacharach TLV Sniffer is iasated in the bag, the iastmment withdnwe the air from <br /> the bag and measures the conceotration of combustible or ionizable vapor in the air removad from <br /> the umple headspace. 'll�e TLV SniR'a is designod to quantify combusdble gas conc�trations <br /> I in the range betwcen 100 and 10,000 ppm (partc per million). <br /> � Field screening results are site-spacific and vary with soil type, soil molsdue coMeat, <br /> Itemperature and type of contaminant. <br /> GEOTECHNICAL LABORATORY TESTING <br /> fAll soil samples obtained from the explontions were sealed and rewrned w our laboratory <br /> for furt'ier examination and testing. Selected samples were tested to determice their naWral <br /> � moisture content in accordance with ASTM D2216-90. The results of the moisturo coM�t teats <br /> are presented on the test pit logs. <br /> I <br /> ( <br /> ! <br /> I <br /> I <br /> l <br /> IG e o E n ; i n e e r ■ e� -Z Fk No.32t6-002-ROIN20094 <br />