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f 4 <br /> 'I <br /> TABLE Al-5 <br /> LABORATORY ANALYSES - GROUNDWATER <br /> [� 7835 Thornton Road, Stockton, CA <br /> Page 7 of 7 ' <br /> (in parts per billion) <br /> DATE WELL ID BENZENE TOLUENE ETHYLBENZENE XYLENES TPHG <br /> f 5126105 MW5 1,700 910 1,900 15,000 42,000 � <br /> Cont. I MW9 <0.5 1 <0.5 <0.5 <1.0 <50 <br /> 8123105 MW5 1,700 1,200 2,200 14,000 1 68,000 <br />{ 11/22/05 MW5 1,900 2,000 2,500 15,000 50,000 <br /> Primary MCLS 1.0 150 780 1,750 NA <br /> I <br /> NOTES: <br /> TPHG = Total Petroleum Hydrocarbons as Gasoline; Analyzed by EPA Method 8015; Benzene, Toluene, <br /> Ethylbenzene, Xylenes analyzed by EPA Method 8020, <br /> < = 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 /> I 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 /> a <br /> i <br /> a <br /> i <br /> 1 E <br /> i I . <br /> f <br /> { <br /> t <br /> i groundzelknowles.hamlgwl ab.doc <br /> i i , <br />