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Groundwater Monitoring E6't <br /> ;end Analytical Results <br /> Tosco(Former BP Oil)Service Station#1 1195 <br /> 16500 South I-5 <br /> Lathrop,California <br /> T E g MTBE <br /> WELL IDI DATE DTW S.I. GWE TPH-D TPH-G B b <br /> TOC*(I (T (fr.bgs) (msl) (ppb) (Ppb) (Ppb) (ppb) (Ppb) (Ppb) (ppb) <br /> MW-1 __ ND ND ND ND ND - <br /> 9.10 12/21/92 11.18 8.0-23.0 -2.08 ND ND ND 0.6 2.1 -- <br /> 05/17/93 8.41 0.69 -- <br /> -0.68 -- ND ND ND ND ND <br /> 09/15/93 9.78 ND ND ND -- <br /> -1.39 - ND ND <br /> 01/12/94 10.49 ND ND ND ND -- <br /> 05/12/94 9.77 -0.67 ND <br /> ND ND ND ND ND <br /> 10107/94 10.54 -1.44 <br /> 1,300 0.8 2.4 ND ND <br /> 12/08/94 10.75 -1.65 - <br /> 0.66 - 69 ND ND ND ND <br /> 02/21/95 8.44 <br /> 06/09/95 7.94 1.16 200 <br /> 08/31/95 9.81 -0.71 91 0.70 ND ND ND <br /> 11/02/95 10.38 -1.28 - -- 130 <br /> 212 __ ND ND ND3 ND 3 ND <br /> 02/28/96 6.98 ND' ND3 ND ND <br /> 09/05/96 9.31 -0.21 -- ND ND <br /> 03/25/97 6.47 2.63 - <br /> ND ND ND3 NDS ND ND <br /> 10/15/97 10.65 1.55 <br /> ND 420 ND ND 3 ND3 ND 9,100 <br /> 01/15/98 9.40 -0.30 -- <br /> ND3 ND ND3 ND3 ND ],200 <br /> ND' ND 3 ND 2,900 <br /> 05/07/98 6.45 2.65 -- 2,700 ND <br /> 09/03/98 8.67 0.43 - <br /> 17,000 1.2 ND'' ND3 ND 13,000 <br /> 17,000 ND ND ND ND 17,000 <br /> 12/23/98 9.08 0.02 -- - -- <br /> 12131/98 INACCESSIBLE-PAVED OVER -- <br /> 03/22/99 INACCESSIBLE-PAVED OVER - 3,380/7,1301 <br /> 9.76 05/20/99 8.72 0.38 - ND ND ND ND ND <br /> 08/11/99 10.11 -0.35 <br /> 99.7 ND ND ND ND 7,060/7,100 <br /> -0.56 ND ND 2.2 ND 2.0 2,50013,0001 <br /> 11119/99 10.32 -- ` <br /> 02/22/00 8.08 1.68 ND ND ND ND ND 2,06011,900 <br /> 05/05/00 8.42 1.34 -- ND ND ND ND ND 99511,8701 <br /> 08/28/00 9.90 <br /> -0.14 1009 ND ND ND ND 274/3141 <br /> -' <br /> 100 ' <br /> 11/13/00 10.18 -0.42 -- 9 ND ND ND ND 338/319 <br /> -0.23 ND ND ND ND ND 641/9031 <br /> 02/09/01 9.99 -- <br /> Q.38 ND ND 0.552 ND 0.691 124/1401 <br /> 05!11/0l 9.38 1,20012,0001 <br /> 08/10/01 10.38 -0.62 -- <50 <0.50 1.6 <0.50 1.5 <br /> -1.13 <120 <1.2 <1.2 <1.2 <1.2 1,60012,0001 <br /> 11/21/01 10.89 -- <br /> 11195.x1s1#180175 1 As of 1 1119/02 <br />