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i i • <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former BP Retail Site No 11194 <br /> 2375 Tracy Blvd, Tracy, CA <br /> TQC Depth to Water Level Ethyl- Total <br /> Well Date P! Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (/ig/L) (pVIL) (ugIL) (mg1L) (ug/L) (pglL) (mg/L) Comments <br /> AMW-6 3/10/1993 -- - - -- ND<50 - ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- -- QC-2 <br /> 3/10/1993 - 2668 547 2121 ND<50 - ND<0 5 ND<0 5 ND<0 5 ND<0 5 - - <br /> 6/16/1993 -- — -- — ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- — QC-2 <br /> 6/16/1993 — 2668 348 2320 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 — — <br /> 10/22/1993 -- — — — ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 — QC-2 <br /> 10/22/1993 -- 2668 590 2078 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 — <br /> 1/24/1994 — -- -- — ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 - — 062 <br /> 1/24/1994 — -- — -- ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 -- QC-1 <br /> 1/24/1994 — 2668 578 2090 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 -- <br /> 6/7/1994 -- -- - -- ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- - QC-2 <br /> 6/7/1994 - 2668 623 2045 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 - 34 <br /> 9/13/1994 — — — — N13<50 — N0<0 5 ND<0 5 ND<0 5 ND<0 5 — — QG2 <br /> 9/13/1994 2668 639 2029 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 82 <br /> 1/10/1995 — — -- — ND<50 — N0<0 5 ND<0 5 ND<0 5 ND<1 — — QC-2 <br /> 1/10/1995 -- 2668 540 2128 ND<50 — 1 N0<0 5 3 2 — 64 <br /> 3/23/1995 -- -- — -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- — QC-2 <br /> 3/23/1995 2668 550 2118 ND<50 - ND<0 50 ND<0 50 N0<0 50 ND<1 0 - 84 <br /> 10/4/1995 -- - - - ND<50 -- ND<Q 50 ND<0 50 ND<0 50 ND<1 0 ND<5 0 - QC-2 <br /> 10/4/1995 - 2668 618 2050 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<5 0 66 <br /> 1/4/1996 - - -- -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<5 0 -- QC-2 <br /> 1/4/1996 -- 2668 568 2100 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<1 0 68 14 <br /> 3/29/1996 - -- - - ND<50 - ND<0 5 ND<l ND<1 ND<1 ND<10 - QC-2 <br /> 3/29/1996 — 2668 546 2122 60 -- ND<0 5 ND<1 ND<1 ND<1 26 3 5 <br /> 7/1/1996 — — — — ND<50 — ND<0 5 ND<1 ND<1 ND<1 ND<10 — QC-2 <br /> 7/1/1996 — 2668 601 2067 ND<50 -- ND<0 5 ND<1 ND<1 ND<1 ND<10 49 <br /> 10/15/1996 — 2668 621 2047 ND<50 — ND<0 5 ND<1 0 ND<l 0 ND<1 0 ND<10 56 <br /> 4/16/1997 — 2668 4 87 2181 — — - -- -- -- — <br /> 10/15/1997 — 2668 860 1808 <br /> 3/17/1998 — 2668 813 1855 — - - -- — -- — <br /> 1/6/1999 — 2668 511 21 57 — -- — -- -- — — -- <br /> 9/13/1999 — 2668 523 2145 — — — — — -- <br /> 1/19/2000 — 2668 478 2190 — <br /> 4/12/2000 - 2668 501 2167 -- — -- — — -- — <br /> Report Date April 8, 2005 Page 9 of 27 <br />