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DRAFT <br /> TABLE 3 <br /> COMPARISON OF DETECTED CONCENTRATIONS IN SOIL <br /> TO U.S.EPA REGION IX PRELIMINARY REMEDIATION GOALS <br /> Burns Property <br /> 1881 Rustan Road <br /> Tracy, California <br /> Results in milligrams per kilogram(mg/kg) <br /> Range of Detected U.S.EPA Region IX <br /> Chemical Concentrations Residential PRGs' <br /> Volatile Organic Compounds <br /> Benzene <0.005 0.62 <br /> Toluene <0.005 5202 <br /> Ethylbenzene <0.005 2302 <br /> Xylenes <0.005 2102 <br /> Polynuclear Aromatic Hydrocarbons <br /> Naphthalene 1.1-6.8 55 <br /> Acenaphthene 0.063-0.94 2600 <br /> Fluorene 0.49-3.7 1800 <br /> Phenanthrene 1.0 —5.7 14,0003 <br /> Fluoranthene 0.03-0.17 2000 <br /> Pyrene 0.078-0.78 1500 <br /> Chrysene 0.12-1.0 56(6'-1) <br /> Benzo(a)anthracene 0.024-0.18 0.56(0.34)" <br /> Notes: <br /> ' U.S.EPA Region IX,Preliminary Remediation Goals(PRGs)for residential soil, <br /> 1998. When available,California modified PRG is shown in parentheses. <br /> 2 PRG is based on theoretical soil saturation concentration,not human health risk. <br /> s A PRG has not been developed for phenanthrene;the PRG for anthracene was <br /> used based on similar physical and chemical structure <br /> ° A California modified PRG was not provided for this chemical in the U.S.EPA <br /> PRG table. A California modified value was calculated by Geomatrix based on <br /> the methodology provided in the PRG documentation. <br /> I:\DOC SAFE\5000S\5650\BURNS\SOILGW-OCr99-COMPARE-T3.DOC <br />