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GEOMATRIX <br /> TABLE 2 <br /> GRAB GROUNDWATER ANALYTICAL RESULTS' <br /> Surland Homes Property <br /> Tracy, California <br /> Results reported in micrograms per liter(µg/1) <br /> TPHd TPHd <br /> Sample Date without with Ethyl- <br /> ID Collected TPHg Filtering Filtering Benzene Toluene benzene Xylenes pAHsO <br /> GB1 7/8/98 720+ _2520' <0.5 0.7 1.6 5.4 Acenaphthene 1.3 <br /> Fluorene 3.4 <br /> Pyrene 0.3 <br /> Chrysene 0.2 <br /> GB4 7/8/98 <50 140 <50 <0.5 <0.5 0.9 5.1 <0.1 <br /> G135 7/8/98 <50 <50 <50 <0.5 <0.5 <0.5 0.5 <0.1 <br /> Notes: <br /> Samples collected by Geomatrix and analyzed by Friedman and Bruya, Inc.,for total petroleum hydrocarbons quantified <br /> as gasoline(TPHg;Q-C12)using EPA Method 8015M; for total petroleum hydrocarbons quantified as diesel(TPHd; <br /> CIO-C24)using EPA Method 8015M following silica gel preparation procedure;for benzene,toluene,ethylbenzene,and <br /> xylenes using EPA Method 8021 B;and for polynuclear aromatic hydrocarbons(PAHs)using EPA Method 8270 SIM. <br /> 2 GB 1 was not analyzed without filtering due to sample breakage. <br /> 3 Naphthalene and phenanthrene detected in samples and in laboratory method blank at similar concentrations; <br /> these results likely are due to laboratory contamination and are therefore not reported. <br /> ° These reported TPHg and TPHd"detections"are likely the result of petroleum-affected soil particulates (<0.7 microns <br /> in size for TPHd analysis)entrained in the water sample,based on the similarity between the soil and water sample <br /> chromatograms for GB 1. <br /> is\doc_safe\6000s\6447.007\bm\tables 1 and 2.x1s <br />