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' 24 August 2000 <br /> AGE-NC Project No 00-0725 <br />' Page 4 of 6 <br />' 3 3 BORING ABANDONMENT <br /> All soil borings were permanently sealed to prevent vertical migration of contaminants Soil borings <br />' were abandoned by backfilling with cement-slurry from the total depth to surface grade <br />' 34 LABORATORY ANALYSES OF SOIL SAMPLES <br /> Selected soil samples were analyzed for <br />' 0 Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Methods 8015 Modified and <br />' • Volatile aromatic hydrocarbons benzene, toluene, ethylbenzene and total xylenes (BTEX) <br /> in accordance with method EPA Method 8020 <br /> I <br />' . 35 LABORATORY ANALYSES OF GRAB WATER SAMPLES <br /> Five grab water samples were analyzed for <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Methods 8015 Modified, <br /> • Volatile aromatic hydrocarbons benzene, toluene, ethylbenzene and total xylenes (BTEX) <br /> in accordance with method EPA Method 8020 <br /> 4.0. FINDINGS <br /> I41 STRATIGRAPHY <br /> The soil profile generally consisted of silt from surface grade to approximately 15 feet below surface <br /> grade Two borings (borings B 1 and 134) encountered a discontinuous sand interval between 15 feet <br /> and above 20 feet bsg Silt was encountered in all borings at 20 feet bsg Saturated conditions were <br /> encountered at 10 feet bsg (Appendix A) Stratigraphic cross sections are presented in Figure 3 <br /> Organic vapor was detected in each of borings at the site The highest concentrations of vapor was <br /> Idetected at 195 ppm in soil collected from boring B3 at a depth of 15 feet bsg (Appendix A) <br /> • <br />