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TreadweII&MIO The highest concentrations of petroleum hydrocarbons in soil were detected in boring CSB-2, located approximately 23 feet cast of AGE Boring B-3 Boring CSB-2 had concentrations of petroleum hydrocarbons quantified as TPH-d and TPH-g in soil ranging from 16 to 560 mg/kg and 470 to 4,400 mg/kg respectively Ethylbenzene and xylene concentrations ranged from below detection limits to 90 mg/kg and below detection limits to 220 mg/kg No benzene or toluene concentrations were detected in any soil samples The analytical laboratory qualified the TPH-d and TPH-g detections as not matching the standard pattern for either compound, and determined that the pattern most closely resembles their standard for stoddard solvent 4 3.2 Groundwater Results Groundwater samples were obtained from borings CSB-1 through CSB-4 Prior to sampling, a new bailer was lowered into each well to look for free product No free product was identified except for a sheen observed at Boring CSB-2 All the groundwater samples contained concentrations of petroleum hydrocarbons quantified as TPH-d Relatively low concentrations of TPH-d were detected in Borings CSB-1 and CSB-4 at 130 and 290 ug/1 respectively Boring CSB-3 had concentrations of petroleum hydrocarbons quantified as TPH-g and TPH-d of 12,000 and 580 ug/l, respectively Boring CSB-2 had concentrations of petroleum hydrocarbons quantified as TPH-g and TPH-d of 34,000 and 440,000 ug/I respectively No benzene was detected in any groundwater samples, while toluene, ethylbenzene, and xylenes were detected at boring CBS-2 at 260, 2,500, and 7,100 ug/l, I respectively Additional volatile organics were detected at CSB-3 and CSB-4 I I The analytical laboratory qualified most of the TPH-d and TPH-g detections as not matching the standard pattern for either compound As with the soil samples, the laboratory determined that the pattern most closely resembled their standard for Stoddard solvent 6 25971013 DGD 12 April 2004