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i TABU <br /> LABORATORY ANALYSES - GROUNDWATER <br /> Knowles Property - Stockton, CA <br /> Page 7 of 7 <br /> (in parts per billion) <br /> NOTES <br /> TPHG = Total Petroleum Hydrocarbons as Gasoline, Analyzed by EPA Method 8016, Benzene, Toluene, <br /> Ethylbenzene, Xylenes analyzed by EPA Method 8020 <br /> C - Not Detected at or Above Method Detection Limits <br /> = Sample chromatogram does not match gasoline fingerprint <br /> 2 = Sample chromatogram contains an unidentified peak which does not match gasoline fingerprint <br /> 3 = When compared to the gasoline standard, chromatogram contains a higher proportion of peaks that <br /> elute before benzene <br /> MCLs = Maximum Contaminant Levels <br /> NA = Not Applicable <br /> groundze1nowles hamlgwlab doe <br />