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' U to 9 600 m TPH-G 9 900 m <br /> Up pp pp TPH-D, 9 7 ppm benzene, 500 p p m <br /> toluene, 190 ppm ethyl benzene, 1,100 ppm total xylenes and 10 p p m <br /> MTBE were detected in soil samples collected along the pipelines Other <br /> compounds detected in the soil samples collected along the piping were <br />' up to 23 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 1998 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 1998, <br /> April 1998 and July 1998 Up to 24 ppb 1 ,2-dichloropropane (1,2-DCP) <br />' was detected in groundwater samples collected from the drinking water <br /> well <br /> 2 .6 April 1999 CPT 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 collected <br /> from the borings at 40-feet bgs, 70-feet bgs and 117-feet bgs using a <br /> SimulProbe sampler Relatively low petroleum-hydrocarbon and volatile <br /> organic compound (VOC) concentrations were detected in the <br /> groundwater samples collected from the CPT borings The only <br /> hydrocarbons and/or VOCs detected in the groundwater samples <br /> collected from 117-feet bgs were 69 ppb TPH-G and 4 6 ppb 1,2-DCP The <br /> only concentration detected in any of these samples which exceeded a <br /> California Department of Health Services (DHS) maximum contaminant <br /> level (MCL) for drinking water was 4 8 ppb benzene detected in the <br /> groundwater sample collected from 70-feet bgs in boring CPT-13 All of <br /> the other concentrations detected were below DHS MCLs for drinking <br /> water <br /> Frank's One Stop Workplan — September 2003 <br /> I -3- <br />