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t , J <br /> IT I <br /> 29 December 1999 ' <br /> f <br /> 1 AGE-NC Project No 97-0312 <br /> I <br /> page 5 of 9 ' <br /> f s ! <br /> ` Ground water was encountered in borings B18, B19 and B26 These three borings were ba <br /> 1 = to approximately 53 feet bs with g ckfilled <br /> g bentonite chips Bonngs B IS through B29 were backfilled to <br /> surface grade with cement grout <br /> 1 i y <br /> y I A <br /> J <br /> 3 4 LOGGING <br /> 7 , <br /> Soil was extruded from the second brass sleeve of each sampling run and was screened for the <br /> v presence of organic vapor using an organic vapor meter equipped with a photo-Ionization detector <br /> l (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene), and the <br /> s were <br /> recorded on the boring log The soil Was then visually described in accordance w, <br /> "Classification Soil <br /> `Classification System th the U <br /> 1 <br /> 35 LABORATORY ANALYSES OF SOIL SAMPLES <br /> Selected soil samples were analyzed for <br /> • TPH-g and TPH-d in accordance,with EPA Methods 5030 and 8015m, and <br /> ' • Volatile aromatic compounds (BTEX) and MTBE in <br /> 602/8020 accordance with EPA Method <br /> ' <br /> Seven soil samples were also analyzed for y <br /> • Fuel oxygenates (MTBE, DIPE, ETBE, TAME and TBA) in accordance with EPA Method <br />�i 8260 modified <br /> -36 'PREPARATION OF CROSS SECTIONS <br /> One map-view figure was prepared illustrating the IateraI extent of impacted r ` <br /> l (Figure 5) Six <br /> cross sections were prepared illustrating,the approximate lateral and vertical extent iof impacted oil <br /> beneath the site`(Flgures 6 throe 11) Figures were prepared using all available soil data collected <br /> near the former UST and dispenser area <br /> s <br /> 5 <br /> 37 MASS CALCULATIONS <br /> Figures 5 through 11 °were used to estimate the mass of remaining'contaminants at the, <br /> site due to <br /> r I <br /> Advanced GebEnvironmental,Inc <br /> h , <br /> ! ! 3 <br />