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u Ili <br /> G] <br /> Mr Harlin Knoll <br /> November 29, 1995 (9347-0085) <br /> • Benzene, toluene, ethylbenzene, and total xylenes (BTEX) using <br /> EPA Method 8020 <br /> The soil sample analytical results of this investigation is summarized in Table 1 The <br /> laboratory report and chain-of-custody forms are included in Attachment 4 <br /> Site Geology and Hydwgeology <br /> A brown silt was generally encountered to approximately 26 feet bg, except in boring <br /> GEO1, where sandy gravel was encountered from approximately 11 to 15 feet bg and boring <br /> GE04 where a silty sand was encountered from 21 feet bg to the total depth of the boring A <br /> s►lty sand was encountered from 31 to 35 feet bg in boring GE02 that was underlain by brown <br /> silt to the total depth of the boring <br /> Ground water was not encountered during the advancement of borings Geol through <br /> GE04 Ground water has not been observed in the well since the well was installed in August <br /> 1990 Ground water measurements taken on October 5, 1989, from a onsite domestic water <br /> supply well indicate depth to ground water is approximately 68 feet bg <br /> Findings and Conclusions <br /> The following are the findings and conclusions of this and previous assessments <br /> • BTEX and TPH-G were not detected above reported detection limits in soil <br /> samples collected at 21 and 26 feet bg in boring GE04 <br /> • TPH-G was not detected above reported detection limits in soil samples collected <br /> at 16 and 21 feet bg in boring GE01 TPH-G and benzene was detected at 100 <br /> and 0 012 ppm in the soil sample collected at 26 feet bg from GE01 TPH-G was <br /> detected at 1,030 ppm in the soil sample TS-2 collected at 15 feet bg in December <br /> 1988 <br /> • TPH-G was detected at 9 7 and 89 ppm in soil samples collected at 11 and 36 feet <br /> bg in boring GE02 TPH-G and benzene were not detected above reported <br /> detection limits in the soil sample collected at 41 feet bg from GE02 TPH-G <br /> was detected at 1,130 ppm in the soil sample PL-5 collected at 4 feet bg in <br /> December 1988 <br /> • TPH-G was not detected above reported detection limits in the soil sample <br /> collected at 21 feet bg in boring GE03 TPH-G was detected at 1 3 ppm in the <br /> soil sample collected at 26 feet bg from GE03 TPH-G was detected at 117 ppm <br /> . in the soil sample PL-6 collected at 4 feet bg in December 1988 <br /> -4- <br /> 9347-0085 ARP <br />