Laserfiche WebLink
J <br /> i 1 <br /> Treadwell&Wlo <br /> of TPH-g and TPH-d at concentrations of 17,000 and 12,000 micrograms per liter(µg/L), <br /> respectively, ethylbenzene at 1,300 pg/L, and xylenes at 2,090 gg/L Significant shallow soil <br /> contamination (less than 15 feet bgs)was not encountered Concentrations of TPH-g were <br /> detected in deeper soil samples from Boring B-3 at 15 and 20 feet bgs at 2,000 and 12,000 <br /> milligrams per kilogram(mg/kg), respectively Tables 1 and 2 summarize the analytical results <br /> ' of AGE's investigation for soil and groundwater, respectively Following this investigation, the <br /> Site was enrolled in the San Joaquin County UST program overseen by the SJCEHD <br /> Treadwell&Rollo prepared a 23 December 2003 workplan for the Site to advance up to six <br /> ' borings to collect soil and groundwater samples in the vicinity of AGE Boring B-3 Between <br /> 15 and 20 January 2004, six borings (CSB-1 through CSB-6) were advanced and soil samples <br /> ' were collected from all six borings,while groundwater samples were collected from Bonngs <br /> CSB-1 through CSB-4 Figure 2 shows the boring locations The total depth of the borings <br /> ranged from 31 to 37 5 bgs, except for Boring CSB-6, which encountered concrete refusal in two <br /> attempts at 4 5 and 8 feet bgs <br /> ' No significant petroleum hydrocarbons were detected in the upper 15 feet of soil (CSB-6 had <br /> ' TPH-d at 6 6 mg/kg at 6 feet bgs) No TPH or VOCs were detected in the upgradient Boring <br /> CSB-4 No benzene, toluene, ethylbenzene, or xylenes (BTEC or methyl tertiary butyl ether <br /> ' (MTBE) concentrations and relatively low concentrations of TPH-d and TPH-g, ranging 1 I to <br /> 18 mg/kg, were detected in soil from Bonngs CSB-1, CSB-3, CSB-5, and CSB-6 <br /> ' The highest concentrations of petroleum hydrocarbons to soil were detected in Boring CSB-2, <br /> ' located approximately 23 feet east of AGE Boring B-3 Bonng CSB-2 had concentrations of <br /> petroleum hydrocarbons quantified as TPH-d and TPH-g in soil ranging from 16 to 560 mg/kg <br /> ' and 470 to 4,400 mg/kg respectively Ethylbenzene and xylene concentrations ranged from <br /> below detection limits to 90 mg/kg and below detection limits to 220 mg/kg,respectively No <br /> benzene or toluene concentrations were detected in any soil samples <br /> 25971020 DGD 3 23 August 2004 <br />