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i <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd,Tracy, CA <br /> TOC 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) (pg1L) (pg1L) (pg1L) (Erg1L) (Ng1L) (pglL) (,ug1L) (mglL) Comments <br /> ATR-12 5/20/1994 -- 4708 906 3802 <10 — <0 3 <0 3 <0 3 <0 5 -- -- <br /> 10/7/1994 — 4708 -- - — - — -- — -- — '" <br /> 12/16/199E- 4 <br /> 8 — - -- -- — — ~ — <br /> 212$11998 - — -- -- - -- -- — <br /> 4/25/19908 -- -- -- — -- -' "" <br /> 4/26/19908 "- <br /> 7/27/19908 — — -- -- - -- - -- <br /> 10/26/19908 -- <br /> 2/12/19908 885 3823 <50 -- <05 <05 <0 5 <0 54118/19908 922 3786 <50 — <05 <05 <0 5 <05 — -- <br /> 7/18/1996 4708 953 37 555 <50 -- <0 5 <0 5 <0 5 <0 5 <5 <br /> 11/15/1996 — 4708 1000 3708 <50 -- <05 <0 5 <0 5 <0 5 <5 3114/1997 NP 4708 1011 3697 <50 — <05 <0 5 <0 5 <0 5 -- 009 <br /> 6/4/1997 NP 4708 934 3774 <50 — <05 <0 5 <0 5 <0 5 <2 5 012 <br /> 8111/1997 NP 4708 967 3741 <50 -- <0 5 <0 5 <05 <05 <2 5 -- <br /> 11/17/1997 NP 4708 9 54 3754 <50 -- <0 5 <0 5 <05 <05 <2 5 — <br /> 3/30/1998 NP 4708 896 3812 <50 -- <0 5 <0 5 <0 5 <0 5 <5 0 21 <br /> 6/25/1998 NP 4708 935 3773 <50 -- <05 <0 5 <0 5 <0 5 <5 0 32 <br /> 9/11/1998 NP 4708 947 3761 <50 — <05 <05 <0 5 <0 5 <2 5 126 <br /> 1211511998 NP 4708 931 3777 <50 — <0 5 <0 5 <0 5 <05 <50 28 <br /> 311 711 9 9 9 NP 4708 916 3792 <50 — <0 5 <0 5 <05 <05 <50 18 <br /> 5/14/1999 NP 4708 933 3775 <50 -- <0 5 <0 5 <05 <0 5 <50 2 <br /> 9/16/1999 NP 4708 955 3753 <50 — <05 <05 <0 5 <0 5 <5 0 37 <br /> 12/22/1999 NP 4708 942 3766 <50 -- <0 5 <05 <0 5 <0 5 <2 50 083 <br /> 2/29/2000 NP 1 4708 893 3815 1 <50 -- <05 <0 5 <0 5 <0 5 <2 50 57 <br /> 6/712000 -- 4708 — -- — -- — — -- — — -- Well inaccessible <br /> 9/25/2000 -- 4708 — -- -- -- — — — — -- Well inaccessible <br /> 12/21/2000 -- 4708 — -- -- - -- — -- — — Well inaccessible <br /> 3/27/2001 P 4708 926 3782 <50 0 -- <0 500 <0 500 <0 500 <0 500 <2 00* 23 <br /> 6/20/2001 P 4708 996 3712 <50 -- <0 50 <0 50 <0 50 <0 50 <2 0*9/12/2001 P 4708 938 3770 <50 - <0 50 <0 50 <0 50 <0 50 <2 5 2 <br /> 12/19/2001 P 4708 928 3780 <50 -- <0 50 <0 50 <0 50 <0 50 <2 0* 232 <br /> 3/14/2002 P 4708 929 3779 <50 - <0 50 1 <0 50 <0 50 1 <0 50 1 <0 50 184 <br /> Report Date October 14,2004 Page 23 of 27 <br />