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i i • <br /> 1 GEOMATRIX <br /> TABLE 3 <br /> 1 COMPARISON OF DETECTED CONCENTRATIONS IN SOIL <br /> TO U.S. EPA REGION IX PRELIMINARY REMEDIATION GOALS <br /> 1 Surland Homes Property <br /> Tracy, Califomia <br /> 1 Results in milligrams per kilogram(mg/kg) <br /> 1 U.S.EPA <br /> Range of Detected Region IX <br /> Chemical Concentrations PRGs' <br /> 1 Volatile Organic Compounds <br /> Xylenes 1.2-3.9 2102 <br /> 1 Toluene 0.04 520' <br /> Ethylbenzene 0.5- 1.5 230' <br /> 1 Polynuclear Aromatic Hydrocarbons <br /> Acenaphthene 0.070—0.630 2600 <br /> Fluorene 0.200— 1.400 1800 <br /> 1 Phenanthrene 0.058—2.800 14,000' <br /> Pyrene 0.039—0.079 1500 <br /> 1 Chrysene 0.050—0.330 56(6.1) <br /> Notes: <br /> 1 U.S.EPA Region DZ,Preliminary Remediation Goals(PRGs)for soil, 1998. <br /> When available,California modified PRG is shown in parentheses. <br /> ' PRG is based on theoretical soil saturation concentration,not human health risk. <br /> 1 ' PRG for anthracene is used based on the similar chemical structure of <br /> phenanthrene and anthracene;no PRG exists for phenanthrene. <br /> 1 <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> 1 t?Doc_Safe\4780\Compact PRGS.DDC <br />