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' TABLE 4 <br /> GROUNDWATER ANALYTICAL DATA <br /> Knowles-Roek <br /> ' Stockton,California <br /> Page 12 of 13 <br /> (in parts per billion) <br /> ' Well Date TPHg Benzene Toluene Ethylbenzene XylenesMTBE <br /> 1 VW-4 11/18/97 -- -- -- -- -- <50 <br /> 2/25198 140 12 19 24 10 <5 0 <br /> 5111100 750 22 41 10 47 <5 0 <br /> 8116100 3,000 34 9 5 32 22 <5 0 <br /> 11/20/00 3,500 77 16 54 110 <10 <br /> 3/8/01 2,000 33 99 16 28 <10 <br /> ' 5/25/01 3,200 59 1 18 1 52 120 <4 0 <br /> 8/30101 Not Sampled <br /> 1211/01 1,200 34 70 1 17 35 <2 0 <br /> ' 2/20102 Not Sampled <br /> 5/23/02 1,600 23 82 1 82 20 <2 0 <br /> 8/26102 Not Sampled <br /> ' <br /> 11/14102 2,500 41 11 34 74 <2 0 <br /> 2/19/03 Not Sampled <br /> VW-5 212/00 2,200 25 13 28 12 <5 0 <br /> 212100 800 12 24 2.6 17 <5 0 <br /> 5/11/00 920 18 35 4 7 78 <5 0 <br /> 8116/00 19100 8 6 29 7.6 32 <5 0 <br /> ' <br /> 11/20/00 400 1 13 1 18 1 68_ 77 <5 0 <br /> 3/8/01 660 39 10 51 17 <2 0 <br /> 5124/01 940 82 23 10 33 <2 0 <br /> 8130101 Not Sampled <br /> 1217101 500 41 10 1 36 43 <20 <br /> 2/20/02 Not Sampled <br /> ' 5/23102 2,400 <05 13 21 380 <2 0 <br /> 8/26102 <br /> 11/13/02 Not Sampled <br /> ' 2/19/03 <br /> VW-6 11/18/97 -- -- -- -- -- <br /> <135 <br /> 2/25198 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 /> 8/17100 35,000 640 1,200 700 4,100 <100 <br /> 11/21/00 43,000 580 1,700 710 3,900 <40 <br /> 318/01 63,000 1,500 8,900 1,200 7,200 <100 <br /> 5125101 68,000 1,200 9,000 1,500 9,000 <100 <br /> ' 8130101 Not Sampled <br /> 12/7/01 50,000 400 960 730 3,800 <50 <br /> 2120/02 Not Sampled <br /> ' 5/23102 13,000 10 51 43 1,500 <40 <br /> . 8/27/02 40,000 590 810 1,100 5,300 <20 <br />