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�I TABLE 3 LABORATORY ANALYSES- GROUNDWATER 1140 W Hammer Lane, Stockton, CA Page 6 of 6 (in parts per billion) DATE WELL ID BENZENE TOLUENE ETHYLBENZENE XYLENES TPHG 02/08/02 MW1 16 <05 28 <10 96 MW3 <05 <05 <05 <10 <50 MW4 08 10 1 <05 14 <50 MW5 3 700 1,900 970 5,500 34,000 05/21/02 MW1 35 <05 64 35 230 MW4 <05 <06 <05 <10 <50 MW5 4,600 2,800 1,900 10,000 72,000 08/16/02 MW1 12 05 49 25 760 MW2 24 <05 <05 <10 <50 MW3 <05 <05 <05 <10 <50 MW4 <05 <05 <05 <10 <50 MW5 3,400 750 370 2,800 31,000 11/12/02 MW1 08 <05 70 32 250 MW4 <05 <05 <05 <10 <50 MW5 5 600 6,000 2,000 11,000 99,000 02/10/03 MW1 42 <0 5 18 10 460 MW3 <05 <05 <05 <10 <50 MW4 <05 <0 5 <05 <10 <50 MW5 4,500 580 400 2,700 48,000 05/27/03 MW1 05 <05 <05 30 200 MW4 06 <05 <05 <10 <50 MW5 1900 190 170 1,500 21,000 08/12/03 MW1 10 05 33 12 900 MW2 <05 <05 <05 <10 <50 MW3 <05 <06 <05 <10 <50 MW4 <05 <05 <05 <10 <50 MW5 3,000 820 440 3,000 34,000 11/12/03 MW1 <05 <05 82 44 310 MW4 <05 <05 <05 <10 <50 MW5 5,200 1,600 790 4,700 48 000 11/26/03 MW9 <05 <05 <05 <10 <50 02/19/04 MW1 54 <05 29 16 690 MW3 <05 <05 <05 <10 <50 MW4 <05 <05 <05 <10 <50 MW5 2,400 820 770 4,300 36,000 MW9 <05 <05 <05 <10 <50 Primar MCLS 10 150 780 1,750 NA NOTES TPHG — Total Petroleum Hydrocarbons as Gasoline, Analyzed by EPA Method 8015, Benzene, Toluene, Ethylbenzene, Xylenes analyzed by EPA Method 8020 < = Not Detected at or Above Method Detection Limits ' — Sample chromatogram does not match gasoline fingerprint 2 = Sample chromatogram contains an unidentified peak which does not match gasoline fingerprint s = When compared to the gasoline standard, chromatogram contains a higher proportion of peaks that — elute before benzene MCLS Maximum Contaminant Levels NA = Not Applicable groundz6knowles hamlgwlk doc