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i • i - <br /> Table 1 Page 15 of 17 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,California <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevation to Water thickness Elevation Elevation Change TPH-G Benzene Toluene Ethyibenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg[l) <br /> ATR-12 07/08/92 9 21 — 3787 -- <50 <0 5 <0 5 <0 5 <05 - <br /> (cont) 10107/92 932 — 3776 -011 <50 <05 <0 5 <0 5 <05 - -- <br /> 01/18/93 832 — 3876 1 00 <50 <0 5 <05 <0 5 <0 5 <br /> 04114/93 879 — 3829 -0 47 <50 <0 5 <05 <0 5 <0 5 - <br /> 08131193 939 — 3769 -060 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10l27193 936 — 3772 0 03 <50 <0 5 <0 5 <05 <0 5 -- <br /> 02/18/94 902 -- 38 06 034 <10 0 4 0 5 <0 3 <0 5 <br /> 05/20194 906 — 3802 -004 <10 <0 3 <0 3 <03 <0 5 <br /> 10/07/94 -- -- — -- -- -- - -- <br /> 12116/94 — — — - <br /> 02/28195 -- — — — - <br /> 04/25/95 -- — — - - <br /> 04/26/95 -- — - - <br /> 07/27/95 — — -- - — - - <br /> 10/26/95 — — — - -- -- -- -- -- <br /> 02/12/96 885 — 3823 -- <50 <0 5 <05 <0 5 <0 5 <br /> 04/18/96 9 22 — 3786 -037 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 07/18196 9 53 — 3755 -031 <50 <05 <05 <0 5 <0 5 <5 — <br /> 11115196 1000 — 3708 .047 <50 <0 5 <05 <0 5 <05 <5 -- <br /> 0311"7 NP 1011 -- 3697 -011 <50 <0 5 <0 5 <0 5 <05 -- 009 <br /> 06104197 NP 934 — 3774 077 <50 <0 5 <05 <05 <0 5 <25 012 <br /> 08/11/97 NP 967 — 3741 -033 <50 <0 5 <05 <05 <0 5 <25 -- <br /> 11/17/97 NP 9 54 — 37 54 013 <50 <0 5 -05 <05 <0 5 <25 — <br /> 03/30/98 NP 896 — 3812 0 58 <50 <0 5 <0 5 <05 <0 5 <50 21 <br /> 06/25/98 NP 9 35 — 3773 -039 <50 <0 5 <0 5 <05 <05 <50 3 2 <br /> 09/11/98 NP 9 47 — 3761 -012 <50 <0 5 <0 5 <05 <0 5 <2 5 1 26 <br /> 12115/98 NP 9 31 — 3777 016 <50 <05 <0 5 <0 5 <0 5 <5 0 2 8 <br /> 03/17/99 NP 916 — 3792 015 <50 <05 <0 5 <0 5 <0 5 <5 0 18 <br /> 05/14/99 NP 933 — 37 75 -017 <50 <0 5 <05 <0 5 -05 <5 0 2 0 <br /> 09/16/99 NP 955 — 3753 -022 <50 <0 5 <05 <0 5 <05 <5 0 37 <br /> 12/22/99 NP 942 — 3766 013 <50 <0 5 <05 <0 5 <05 <2 50 083 <br /> 02/29/00 NP 893 — 3816 0 49 <60 <0 5 <0 5 <0 5 <0 5 <2 50 57 <br /> SMW-1 10107/94 5024 1286 — 3738 37 38 2,200 250 110 <0 5 360 -- -- <br /> 1211155;94 1254 — 3770 0 32 5,200 740 210 330 600 - -- <br /> 02/28195 1240 — 3784 014 8,300 1000 330 450 790 <br /> 04/26/95 1271 — 3753 -0 31 5,100 470 110 270 480 — — <br />