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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 DIPE EtBE TAME 1,2-DCA EDB PCE Methanol <br /> Number Sampled (ug1L) (pg/L) (pglL) (pg1L) (Erg/L) Lig/L) (pg/L) (pg1L) (Erg/L) (pg1L) Comments <br /> ATR-11 06/09/2003 — -- -- — _ _ <br /> 09/1812003 <100 <20 <0 50 <1 0 <1 0 <1 0 - -- -- — <br /> 12/24/2003 — -- -- — — — <br /> 03/12/2004 <100 <20 <0 50 <0 50 <0 50 <0 50 <br /> ATR-12 3/27/2001 — <200 <2 00 — -- — -- — — <br /> 6/20/2001 - — <2 0 <br /> 9/12/2001 _ <200 -- <br /> 12/19/2001 -- <20 <2 0 -- - — -- -- -- <br /> 3/14/2002 <50 <0 50 — <br /> 6/28/2002 — <5 <0 5 <0 5 <0 5 <0 5 — — — <br /> 9/11/2002 -- <20 <0 5 <05 <05 <0 5 -- -- — <br /> 12/17/2002 — <5 <05 <0 5 <05 <0 50 -- — -- -- <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 /> 03/12/2004 <100 <20 <0 50 <0 50 <0 50 <0 50 _ <br /> SMW-1 11/17/1997 — <500 500 <10 I <10 <10 -- — — — <br /> 12/15/1998 -- -- — -- -- _ _ _ _ _ Well no longer monitored <br /> TEX-1 6/20/2001 -- — <br /> 9/12/2001 — — -- <br /> 12/19/2001 — -- _ <br /> 3/14/2002 -- — -- <br /> 6/28/2002 -- -- — <br /> 9/11/2002 — — -- <br /> 12/17/2002 -- <br /> TBA=Tert-butyl alcohol <br /> MtBE=Methyl tert-butyl ether <br /> DIPE=Di-isopropyl ether <br /> EtBE=Ethyl tert-butyl ether <br /> TAME=Tert-amyl methyl ether <br /> 1,2-DCA=1,2-dich loroethane <br /> EDB=Ethylene dibromide <br /> PCE=Tetrachloroethene <br /> Erg/L=micrograms per liter <br /> Report Date May 6, 2004 Page 506 <br />