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<br /> Groundwater Monitoring*and Analytical Results •
<br /> Tosco(Circle K)Unit#01205 _
<br /> 16470 Cambridge Street
<br /> Lathrop,California
<br /> IWUIJID/ DATED1W S.I. GWE TPH(G) B T E X MTBE
<br /> K3C1 f ) ft bis) ) (Ppb) (Ppb) (ppb) (ppb) (ppb) (PP6)
<br /> MW-1
<br /> 1762 10/08/98 1127 6 0-26 0 635 29,000 180 2,500 3,200 13,000 3,4003
<br /> 01/25/99 1173 589 40,000 320 1,800 2,500 12,000 22,000
<br /> 04/29/99 1021 741 380 69 27 94 too 51
<br /> 07/16/99 1108 6 54 67,000 380 1,500 2,900 17,000 1,40018203
<br /> 10/21/99 1143 619 31,000' 110 1,100 1,900 11,000 320/2503
<br /> 01/31/00 1050 712 48,000' 100 2,900 2,500 16,000 2,30012,2003
<br /> 04/10/00 870 892 45,600' ND2 1,570 2,660 15,000 2NDI1863
<br /> 07/05/00 965 7.97 29,4008 704 224 1,910 8,910 2ND/ND a,3
<br /> MW-2
<br /> 1750 10/08/98 1117 6 0-26 0 633 18,000 210 100 1,600 1,700 4,0003
<br /> 01/25/99 1164 586 28,000' 270 410 2,400 6,300 79,000
<br /> 04/29/99 1012 738 2904 090 26 11 29 22
<br /> 07/16/99 1098 652 22,000 160 130 1,200 3,300 1,40015603
<br /> 10/21/99 1135 615 25,000 Ito 180 940 2,400 'ND1713
<br /> 01/31/00 1043 707 47,000' 280 360 2,800 9,800 12,000/9,8003
<br /> 04/10/00 859 891 31,300' 335 1,220 2,390 8,660 2ND/5323
<br /> 07/05/00 9.55 7.95 5,6008 222 922 537 446 178/2373
<br /> MW-3
<br /> 1816 10/08/98 1167 8 0-28 0 649 11,000 14 34 580 560 ND
<br /> 01/25/99 1217 599 6,100 28 ND 220 190 ND
<br /> 04/29/99 1065 751 150 1 1 ND ND 15 ND
<br /> 07/16/99 1154 662 10,000 ND ND 380 200 2NDINW
<br /> 10/21/99 1178 638 5,5007 19 32 190 130 131ND3
<br /> OI131/00 1084 732 8,500' 27 NW 460 270 'ND/193
<br /> 04/10/00 891 925 2,250' 960 ND 982 450 2ND/ND 3
<br /> 07/05/00 979 8.37 3,6408 21.9 ND 190 671 2ND/ND2'3
<br /> 01205 xis/180183 1 As of 07/05/00
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