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1 <br /> Ta1 <br /> Groundwater Monitorings and Analytical Results . <br /> Tosco (Former Unocal) Bulk Plant #0788 <br /> 8203 East 11th Street <br /> Tracy, California <br /> Well IDI Date DTW GWE TPH(D) TPH(G) B T E X MTBE <br /> TOCK` {f1.) (WO (ppb) (ppb) b) (ppb) (ppb) b) b) <br /> U-10 08/06/92 - - ND ND ND ND ND ND -- <br /> 11/18/92 - 702 ND ND ND ND ND -- <br /> 01/21/93 -- -- ND ND ND ND ND ND -- <br /> 43.67 05/26/93 7.63 36.04 95 ND ND ND ND ND - <br /> 08/24193 7.63 36.04 ND ND ND ND ND ND - <br /> 43.11 11/30/93 7.55 35.56 ND ND ND ND ND ND -- <br /> 02/18/94 7.32 35.79 ND ND ND ND ND ND -- . <br /> 05/12/94 6.94 36.17 ND ND ND ND ND ND -- <br /> 08/08/94 6.72 36.39 ND ND ND ND ND ND -- <br /> 11/08/94 7.98 35.13 ND ND ND ND ND ND -- <br /> 02/13/95 7.63 35.48 ND ND ND ND ND ND -- <br /> 10110/95 7.79 35.32 SAMPLED ANNUALLY -- -- -- -- -- <br /> 02/13/96 7.15 35.96 ND ND ND ND ND ND -- <br /> 11/06/96 6.69 36.42 -- -- -- -- -- -- -- <br /> 05l06197 5.98 37.13 ND ND ND ND ND ND -- <br /> 04/29/98 7.35 35.76 6910 ND ND ND ND ND ND <br /> 12/0I198 7.58 35.53 -- -- -- - -- -- -- <br /> 05124199 6.90 36.21 ND ND ND ND ND ND ND <br /> Field Blank 02/18/97 -- -- ND ND ND 1.5 ND 0.84 -- <br /> Trip Blank <br /> TB-LB 04/29/98 -- - -- ND ND ND ND ND ND <br /> 12/01/98 - - - ND ND ND ND ND ND <br /> 05/24/99 -- -- -- ND ND ND ND ND ND <br /> 0788.xlsl#180144 7 As of 05/24/99 <br />