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TO PO 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 Ethylbenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) In feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1) <br /> 051114199 920 — 3887 099 -- -- -- -- -- — 280 <br /> 09/16/99 P 952 — 3855 -032 <50 <0 5 <0 5 <0 5 <0 5 <5 0 34 <br /> 92/22/99 932 — 3875 020 -- -- -- -- -- -- 044 <br /> 02/29/00 P 860 — 3947 072 114 <0 5 0 678 <0 5 1 63 <2 5 32 <br /> 06/07/00 NP 935 — 3872 -075 -- -- -- -- — .. .. <br /> ATR-12 90/16/90 4708 — - -- — <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/19/90 933 — 3775 — — -- __ -- <br /> 01/10191 916 — 3792 017 <50 <0 5 <0 5 <0 5 <0 5 — <br /> 04/10/91 898 - 3810 018 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/12/91 928 — 3780 -030 <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 09/24/91 952 -- 3756 -024 -- — -- -- -- <br /> 09/25191 -- -- — -- <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> 01/23/92 906 -- 3802 -- <50 <0 5 <0 5 <0 5 <0 5 - - <br /> j 04/20/92 900 — 3808 006 -- — -- -- -- _ <br /> 04/21/92 — — — -- <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> 07/08/92 921 — 3787 -- <50 <0 5 <0 5 <0 5 <0 5 -- — <br /> 10/07/92 932 -- 3776 -011 <50 <0 5 <0 5 <0 5 <0 5 - — <br /> 01/18/93 832 — 3876 100 <50 <0 5 <0 5 <0 5 <0 5 -- — <br /> 04/14/93 879 — 3829 -047 <50 <0 5 <0 5 <0 5 <0 5 -- — <br /> 08/31/93 939 -- 3769 -060 <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 10/27/93 936 — 3772 003 <50 <0 5 <0 5 <0 5 <0 5 — - <br /> 02/18/94 902 — 3806 034 <10 04 05 <0 3 <0 5 - - <br /> 05/20/94 906 -- 3802 -004 <10 <0 3 <0 3 <0 3 <0 5 - <br /> 10/07/94 -- — — -- _ — -- - - - <br /> 12/16/94 -- — _ -- <br /> 02/28/95 — — -- - <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 <0 5 <0 5 <0 5 -- -- <br /> 04/18/96 922 -- 3786 -037 <50 <0 5 <0 5 <0 5 <0 5 - -- <br /> 07/18/96 953 — 3755 -031 <50 <0 5 <0 5 <0 5 <0 5 <5 -- <br /> 11/15/96 1000 — 3708 -047 <50 <0 5 <0 5 <0 5 <0 5 <5 -- <br /> ATR-12 03/14/97 NP 1011 — 3697 -011 <50 <0 5 <0 5 <0 5 <0 5 -- 009 <br /> (cant) 06104197 NP 934 — 3774 077 <50 <0 5 <0 5 <0 5 <05 <2 5 012 <br /> 08/11/97 NP 967 -- 3741 -033 <50 <0 5 <0 5 <0 5 <0 5 <2 5 -- <br />