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11 ppm ethyl benzene, 120 ppm total xylenes and 23 ppm MTBE were <br /> • detected in soil samples collected from the UST excavations Up to <br /> 24,000 ppb TPH-G, 97,000 ppb TPH-D, 490 ppb benzene, 2,700 p p b <br /> toluene, 780 ppb ethyl benzene, 5,000 ppb total xylenes and 16,000 p p b <br /> MTBE were detected in grab groundwater samples collected from the UST <br /> excavations A total of 15 soil samples were collected along the <br /> pipelines Up to 9,600 ppm TPH-G, 9,900 ppm TPH-D, 97 ppm benzene, <br /> 500 ppm toluene, 190 ppm ethyl benzene, 1,100 ppm total xylenes a n d <br /> 10 ppm MTBE were detected in soil samples collected along the pipelines <br /> Other compounds detected in the soil samples collected along the piping <br /> were up to 2 3 ppm vinyl acetate, 15 ppm isopropylbenzene, 5 1 ppm n- <br /> propylbenzene, 330 ppm 1,3,5-trimethylbenzene, 910 ppm 1 ,2,4- <br /> trimethylbenzene, 23 ppm sec-buylbenzene and 140 ppm n- <br /> butylbenzene Approximately 726 tons of contaminated soil were <br /> overexcavated from the former tank excavations and were disposed of at <br /> the Altamont Landfill in Livermore, California <br /> 2.5 August 1999 Area Well Survey <br /> In August 1998, Remedy, Inc. conducted an area well survey for the site <br /> and identified 46 drinking water wells within 05 miles from the site, <br /> including a drinking water well on-site Groundwater samples were <br /> collected from the on-site drinking water well in July 1997, January <br /> 1998, April 1998 and July 1998 Up to 24 ppb 1 ,2-dichloropropane <br /> (1,2-DCP) was detected in groundwater samples collected from the <br /> drinking water well <br /> 2.6 Amil 1999 M Borings, <br /> In April 1999, ASE drilled soil borings CPT-13 and CPT-14 at the site using <br /> a CPT direct push drill rig (Figure 3) Groundwater samples were <br /> collected from the borings at 40-feet bgs, 70-feet bgs and 117-feet bgs <br /> using a SxmulProbe sampler Relatively low petroleum-hydrocarbon and <br /> VOC concentrations were detected in the groundwater samples collected <br /> from the CPT borings The only hydrocarbons and/or VOCs detected in <br /> the groundwater samples collected from 117-feet bgs were 69 ppb TPH-G <br /> and 4 6 ppb 1,2-DCP The only concentration detected in any of these <br /> samples which exceeded a California Department of Health Services <br /> (DHS) maximum contaminant level (MCL) for drinking water was 48 p p b <br /> benzene detected in the groundwater sample collected from 70-feet bgs <br /> in boring CPT-13 All of the other concentrations detected were below <br /> DHS MCLs for drinking water <br /> Franks One Stop Report — March 2001 <br /> -3- <br />