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ILLI L / laborat.ary,samples are cooled to 4-celsius at the site and maintained at that temperature until they were received at the laboratory, Prior to transport, - number, sample warethe samples logged cont Snera type,,sample tidentI flcationIdentifying plerhe d date. The samples were picked up by Superior Analytical, Inc„ where a laboratory _ representative signed the chain-of-custady Form. The samples were then placed in a rafriggrater until they were extracted and analyzed prior to their - expiration date. _ 3.5 GEOLOGIC CROSS-SECTIONS Geologic rocs-sections were prepared haled en litholo9ic tnfprmatSon obtained from the drilling aF TBS, TB6, TB7, TBB, TB9,MW4 and HWS. Tho ilei{led 5 it Class lficatioo System was used to classify the sails, la both the soil torSng and monitoring well installations,dlscrete se11 samples were taken every 5.foet - �- n additional sample was collected at d s lit-z,an sam-i er. A P e modified p using th P P e discrete .. to verify th o toot it observed Y I� z/, e drill cult in s were c n Y eetc. Th 9 I — technique?de described tio,in Section 3f 1s made ,ewaso usedton vTBS. A wntinuau5 sampling _ Sails In this area generally consist of law plasticity silts, clays, and fine _ sands with some clayey silts and silty clays. In sedlon A-A',Figure 5, an or4anjC f"I mstar ta7 exists at a depth of twe to 'does nottextend much abeyond TB6 lin westerlya,southvdlr ctl n�.t At the anorthern - I` end aF the site, low plasticity clays exist from 5.to 16 feet Below ground I surFace overlaying a 2 foot thick Fine sand layer. Sells then grade into low I plasticity clayey silts and silts of medium brown color with intermittent clay and sand lenses dawn to 50 feet. From 50 td 61 Feet; the soils consist of f'� intermittent sand and silt layers,with a very hard,well compacted clay layer I _ at 60 feet. Figure 6 presents a west to east geologic cr s-section along the northern boundary of the site. os - Soils In thm southern section of the property COnsi st"'low pl11'111ty clays, silty clays,and Uayey sl its to a depth of IS feet. .?hese se lis grade Into a - e red-brown 511[that extstsfrom a depth of 20 feet down to 40 feet.-The silt 1s uniform with depth,containing soma clay particles,and Increasing in moisture content with depth. At a depth of 40 feet,the soil becomes a poorly graded fine i - brown sand. Grain size and clay content of this fine sand layer varies to a it depth of 65 feet. - Groundwater was encountered in H44 and KW5 at 53 feet. 3.6 SAMPLE ANALYSIS So11 samples were collected from ea h of the seven borings and analyzed for BTII&E f} -and TPH as gasoline{exwpL fer.T66 which also had two saeplez analyzed for TPH 'L�-. as dSeselJ. After the first round of analyses,a number df cpnfirmatlon analyses \} were performed to verify the results. Soil grab samples ere collected from the '� loll stockpile on November 9, 1989 and Tram BCA drums on December 7 and