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ethyl benzene, 63 ppm toluene and 9 2 ppm methyl tertiary butyl ether
<br /> . (MTBE) were detected in the soil samples collected from these borings
<br /> Groundwater samples collected from these borings contained up to
<br /> 130,000 ppb TPH-G, 760 ppb TPH-D, 5,300 ppb benzene, 28,000 p p b
<br /> toluene, 3,500 ppb ethyl benzene, 21,000 ppb total xylenes and 21 ,000
<br /> ppb MTBE The highest hydrocarbon concentrations were detected in soil
<br /> and groundwater samples collected from borings B-2, B-3, B-5 and B-7
<br /> near the USTs and dispenser islands
<br /> Zy.3 May 1 Q4,R Site A,SCP_cCmPnt
<br /> In May 1998, Remedy, Inc drilled three soil borings (B-11, CPT-11, and
<br /> CPT-12) at the site (Figure 2) Boring B-11 was drilled using mud rotary
<br /> drilling but was abandoned due to poor sample recovery A soil sample
<br /> collected from 14-feet bgs in boring B-11 contained 13 ppm TPH-G, 140
<br /> ppm TPH-D, 0 006 ppm toluene, 0 013 ppm ethyl benzene and 0 084 p p m
<br /> total xylenes No hydrocarbons were detected in the soil sample
<br /> collected from 33-feet bgs in this boring Borings CPT-11 and CPT-12
<br /> were drilled using cone penetrometer testing (CPT) The soil sample
<br /> collected from 13-feet bgs in boring CPT-11 contained 550 ppm TPH-G,
<br /> 500 ppm TPH-D, 0 75 ppm toluene, 3 6 ppm ethyl benzene and 42 p p m
<br /> • total xylenes The soil sample collected from 75-feet bgs in boring
<br /> CPT-11 contained 15 ppm TPH-G, 10 ppm TPH-D, 0 036 ppm toluene,
<br /> 0 11 ppm ethyl benzene, 0 96 ppm total xylenes and 0 093 ppm MTBE
<br /> Other compounds detected in soil samples from borings B-11 and CPT-11
<br /> included up to 0 024 ppm tetrachloroethene (PCE), I 1 ppm isopropyl
<br /> benzene, 99 ppm n-propylbenzene, 10 ppm 1,3,5-trimethylbenzene, 2 9
<br /> ppm t-butylbenzene, 32 ppm 1 ,2,4-trimethylbenzene, 0 87 ppm sec-
<br /> butylbenzene, 0 11 ppm naphthalene and 5 7 ppm n-butylbenzene No
<br /> hydrocarbons were detected in soil samples collected from boring
<br /> CPT-12 The CPT also provided valuable information on lithologic and
<br /> hydrogeologic conditions at depth beneath the site Sediments beneath
<br /> the site are primarily sand and sandy silt of relatively high permeability
<br /> The only significant low permeability materials were clayey silt layers
<br /> located between 26 and 32-feet bgs and 50 and 64-feet bgs (in boring
<br /> CPT-12 only)
<br /> 2-4 June 1999 UST Rem Oval and Contaminated_Soil Excavation
<br /> In June 1998, Remedy Construction removed two (2) 10,000 gallon diesel
<br /> USTs and four (4) 10,000 gallon gasoline USTs from the site Staining
<br /> and hydrocarbon odors were present in soil beneath the USTs Up t o
<br /> • 1,100 ppm TPH-G, 19,000 ppm TPH-D, 1 4 ppm benzene, 19 ppm toluene,
<br /> Franks One Stop Report - March 2001
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