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Table 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd, Tracy, CA <br /> Well Date Ethanol TBA MtBE RIPE EtBE TAME 1,2-DCA EDB PCE Methanol <br /> Number Sampled (pg/L) (U9/L) (pg/L) (pg/L) (uglL) (Erg/L) (pg/L) (ErgIL) (ErgIL) (pgIL) Comments <br /> ATR-4 3/27/2001 — <200 <2 00 <br /> 6/20/2001 — — <2 0 <br /> 9/12/2001 -- <200 — <br /> 12/19/2001 — <20 <20 <br /> 3/14/2002 — <50 <2 0 -- — — <br /> 6/28/2002 — <5 <0 5 <0 5 <0 5 <0 5 — -- — <br /> 9/11/2002 -- <20 <0 5 <0 5 <0 5 <0 5 <br /> 12/17/2002 — - -- — -- — -- — -- — Well inaccessible <br /> 03/31/2003 <100 <20 <0 50 <0 50 <0 50 <0 50 <br /> 06/09/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 <br /> 09/18/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 <br /> 12/24/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 <br /> 03112/2004 <100 <20 <0 50 <0 50 <0 50 <0 50 <br /> ATR-5 12/29/2000 — <200 <2 00 -- — — <br /> 3/27/2001 -- <200 18 <br /> 6/20/2001 - — 220 <br /> 9/12/2001 — <200 -- <br /> 12/19/2001 -- — -- — -- — -- -- Well inaccessible <br /> 3!1412002 — -- -- — — -- — -- -- Well inaccessible <br /> 6/28/2002 -- <5 83 <0 5 <0 5 <05 <br /> 9/11/2002 — <20 19 <0 5 <0 5 <0 5 <br /> 12/17/2002 — — -- — -- - — — — Well inaccessible <br /> 03/31/2003 <100 <20 11 <0 50 <0 50 <0 50 -- — — <br /> 06/09/2003 <100 <20 31 <10 <10 <10 <br /> 09/18/2003 <500 <100 59 <5 0 <5 0 <5 0 — — — <br /> 12/24/2003 <200 <40 57 <2 0 <2 0 <2 0 <br /> 03/1212004 <100 <20 16 <0 50 <0 5o <0 50 -- .. .. <br /> ATR-6 3/27/2001 -- <200 521 -_ <br /> 6/20/2001 <br /> 9/12/2001 -- <200 <br /> 12/19/2001 <br /> 3/14/2002 -- <50 18 — _ <br /> 9/11/2002 — <20 068 <0 5 <0 5 <0 5 -- — _ <br /> 12/17/2002 <br /> Report Date May 6,2004 Page 2 of 6 <br />