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I <br /> TABLE 2 <br /> F GROUNDWATER ANALYTICAL DATA <br /> Knowles-Roek <br /> Stockton,California <br /> • Page 13 of 13 <br /> (in parts per billion) <br /> Well Date TPHg Benzene Toluene Ethylbenzene Xylenes MTBE <br /> VW-6 11/18/97 -- -- -- -- -- <135 <br /> 2/25/98 14,000,000 6,600 43,000 100,000 720,000 <30 <br /> 2/3/00 28,000 420 840 410 2,600 <50 <br /> 5/11/00 11,000 410 920 250 1,400 <100 <br /> 8117/00 35,000 640 1,200 700 4,100 <100 <br /> 11/21/00 43,000 580 1,700 710 3,900 1 <40 <br /> 3/8101 63,000 1,500 8,900 1,200 7,200 <100 <br /> 5/25/01 68,000 1,200 9,000 1,500 9,000 <100 <br /> 8/30/01 Not Sampled <br /> 12/7/01 50,000 400 960 1 730 3,800 <50 <br /> 2/20/02 Not Sampled <br /> 5/23102 13,000 10 51 43 1,500 <40 <br /> 8127/02 40,000 590 810 1,100 5,300 <20 <br /> 11/14/02 54,000 680 1,200 1,400 7,400 <100 <br /> 2119/03 Not Sampled <br /> 5/29/03 41,000 510 780 1,200 4,900 <100 <br /> NOTES - <br /> TPHg Total petroleum hydrocarbons as gasoline <br /> MTBE = Methyl tert-butyl ether <br /> - Less than indicated detection limit <br /> - = Not Analyzed <br /> * - Gasoline is primarily composed of benzene <br /> I <br />