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Table I <br /> Groundwater Elevation and Analytical Data <br /> Former BP Service Station No 11194 <br /> 2375 Tracy Blvd, Tracy CA <br /> Top of Depth to Water Level Ethyl- Total <br /> Well Date P/ Casing Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP Elevation (feet bgs) (feet msl) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (mg/L) Comments <br /> AMW-1 4/26/1990 -- 2653 535 21 18 100 -- ND<0 3 ND<0 3 ND<0 3 ND<0 3 -- - <br /> 7/12/1990 2653 558 2095 70 — ND<0 3 ND<0 3 13 06 — - <br /> 8/27/1990 -- 2653 5 98 2055 — -- — — — - — <br /> 11/2/1990 -- <br /> 2653 594 2059 - <br /> 11/5/1990 - 2653 5 97 2056 ND<50 -- ND<0 3 N0<0 3 ND<0 3 N0<0 3 -- — <br /> 2/25/1991 — 2653 479 2174 ND<50 — ND<0 3 ND<0 3 N0<0 3 ND<0 3 ~ -- <br /> 3/25/1991 2653 475 2178 ND<30 -- ND<0 30 ND<0 30 ND<0 30 ND<0 30 -- - <br /> 6/27/1991 - 26 53 589 2064 ND<50 - ND<0 5 ND<0 5 ND<0 5 ND<0 5 — -- <br /> 9/25/1991 -- 2653 653 2000 ND<30 — ND<0 30 ND<0 30 ND<0 30 ND<0 30 - — <br /> 12/10/1991 -- 2653 567 2080 45 -- ND<0 30 ND<0 30 ND<0 30 ND<0 30 - <br /> 6/25/1992 -- 2653 662 1991 N0<30 — ND<0 30 N0<0 30 ND<0 30 ND<0 30 -- — <br /> 12/8/1992 - 2653 565 2088 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 — -- <br /> 3/10/1993 — 2653 477 21 76 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 —6M611993 -- 2653 527 2126 — — — — — <br /> 10/22/1993 -- 2653 589 2064 -- - — -- — <br /> 1/24/1994 -- 2653 538 2115 — -- - ~ — -- — <br /> 6/7/1994 -- 2653 581 2072 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 33 <br /> 9/13/1994 -- 2653 646 2007 <br /> 1/10/1995 - 2653 486 2167 -- — -- - - ~ — `- <br /> 3123/1995 -- 26 53 460 2193 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<1 0 — 83 <br /> 10/4/1995 -- 2653 622 2031 — — ~ _ -- <br /> 1/4/1996 -- 2653 512 2141 — — — — ~ — — — <br /> 3/29/1996 — 26 53 452 2201 ND<50 — ND<0 5 ND<1 ND<1 N0<1 ND<10 34 <br /> 711(1996 - 2653 510 2143 -- — ~ -- -- — _ <br /> 10/15/1996 -- 2653 531 2122 — — - — — — <br /> 4/16/1997 -- 2653 388 2265 — <br /> 10115!1997 - 2653 604 2049 -- — -- — -- — '- <br /> 3/17/1998 - 2653 560 2093 — <br /> 1/611999 -- 2653 555 2098 — — — -- - — -- <br /> 9/1311999 — 2653 510 2143 -- - -- — -- _ <br /> 1/19/2000 — 2653 519 21 34 <br /> 4/12/2000 — 2653 612 2041 - — - - — — — <br /> 7/22/2000 - 2653 598 2055 <br /> Report Date April 28,2004 Page i of 24 <br />