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Table 1 GroundwaterMonitorin and Analytical Results .,.. Tosco(Former BP Oil)Service Station#11195 16500 South I-5 Lathrop,Califomia WELL Tl)7 HATE p[W. S: GWE;, TPH D TPH B : . T E X: MTBE ITOC.*(ftJ? ( 1 bgs} C► tI 000).: (PPb .. (PPb� (PPb� F.P. (PPbJ PP. . 11/21/01 9.97 -1.06 -- <120 <1.2 <1.2 <1.2 <1.2 1,500/1,700' 02/07/02 7.96 0.95 -- <50 <0.50 <0.50 <0.50 <0.50 1,200/1,500' 05/23/0213 8.78 0.13 -- <300 <5.0 <5,0 <5.0 <10 --/1,4001 13.61 08/15/0216'36 9.24 4.37 52054 <5.0 <5.0 <5.0 <10 1,900 11/18-1910216''6 9.72 3.89 -- <1,000 <10 <10 <10 <20 1,700 -- 4.0-14.0 -- -- -- -- (Cont)MW-8 02113-14103 -- -- -- -- 02/21/0316.18 8.97 4.64 <1,000 <10 <10 <10 <20 1,600 05/12-13/0316 9.16 4.45 -- <5,000 <50 <50 <50 <100 2,600 MW-9 8.04 09/03/98 7.52 5.0-15.0 0.52 -- ND ND ND3 ND 1.6 ND 12/23/98 INACCESSIBLE-PAVED OVER -- -- - -- - -- - 12/31/98 8.01 0.03 -- ND ND ND ND ND ND 03/22/99 6.91 1,13 -- ND ND3 ND3 ND3 ND 1.1 8.04 05/20/99 6.92 1.12 -- ND ND ND ND ND ND/ND' 08/11/99 8.25 -0.21 -- ND ND ND ND ND ND/NDI 11/19/99 8,48 -0.44 -- ND ND 0.71 ND 0.82 ND/3.4' 02/22/00 6.38 1.66 - ND ND ND ND ND ND/ND' 05/05/00 6.54 1.50 -- ND ND ND ND ND ND/ND' 08/28/00 8.14 -0.10 - ND ND ND ND ND ND/ND' 11/13/00 8.38 -0.34 -- ND ND ND ND ND ND/ND� 02/09/01 8.11 -0.07 -- ND ND ND ND ND ND/ND' 05/11/01 7.59 0.45 -- ND ND ND ND ND ND/ND' 08/10/01 9.18 -1.14 <50 <0.50 1.1 <0.50 0.91 <5.0/<2.0' <50 <0.50 <0.50 <0.50 <0.50 <5.0/<1.01 11/21/01 9.64 -1.60 -- ' 02/07/02 7.69 0.35 -- <50 <0.50 <0.50 <0.50 <0.50 <2.5/<2,01 05/23/0213 8.66 -0.62 -- <50 <0.50 <0.50 <0.50 <1.0 --/<0.501 13.29 08/15/0216'18 9.18 4.11 -- <50 <0.50 <0.50 <0.50 <1.0 <2.0 11/18-19/0216.18 9.55 3.74 -- <50 <0.50 <0.50 <0.50 <1.0 3.5 02/13-14/03'6,18 8.80 4.49 -- <50 <0.50 <0.50 <0.50 <1.0 52 05112-1310316 8.95 4.34 <50 <0.50 <0.50 <0.50 <1.0 63 11195.xls/4180175 10 As of 05/13/03