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TABLE 2 Concentrations of Petroleum Hydrocarbons in Ground Water (ug/L) H.J. Heinz Co., Tracy, CA All Samples Collected September 3,1997 TPH- TPH- TPH-Motor Unknown Xylenes- Sample# Gasoline TPH-Diesel Oil Hydrocarbon** Benzene Toluene Ethylbenzene Total VOCs-TCL FN3 <50 <50 <50 <50 I NA NA NA NA All ND FS3 25,000* <25,000(o) <25,000(o) Y 160,000 NA NA NA NA All ND(G) UST1N 460,000 <50,000(o) <50,000(o) 430,000 650 8,600 4,100 14,000 NA UST2N 67,000* 2,500(o) 2,500(o) a 9,500 1,600mm <250 5,900 81500 NA Trip Blank NA NA NA NA NA NA NA T NA All ND California MCLS 1 680 1,750 NOTES TPH-gasolme analysis performed using California LUFT Methodology(October 1989) TPH-diesel analysis performed using California Tri-Regional Methodology Method 5030(purge and trap)is used for gasoline sample preparation/introduction Method 3550 (sonication)or Method 3510 (separatory funnel liquid-liquid)is used for diesel/motor oil sample extraction/preparation EPA Method 8260 used for Volatile Organics-TCL analysis EPA Method 8020 used for benzene,toluene,ethylbenzene,and total xylenes(BTEX) analysis Bolded values exceed MCLS NA-Not analyzed <=Analyte not detected at reporting limit shown *-The peak pattern present in this sample does not exactly match the gasoline reference standard,and appears to be degraded gasoline Quantitation is based upon a gasoline reference in the range of n-007 to n-C12 **-The hydrocarbon pattern present in these samples represents an unknown mixture atypical of diesel fuel or motor oil in the range of n-008 to n-C40 Quantitation is based on a diesel reference between n-C10 and n-C24 only ND-Parameter not detected above laboratory reporting limits(variable) G-Laboratory reporting limits raised due to matrix interference o-Laboratory reporting limits raised due to high level of analyte present in sample