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Table 2 <br /> Fuel Oxygenates Analytical Data <br /> Former ARCO Service Station No 2168 <br /> 441 W Charter Way, Stockton CA <br /> Well Date Ethanol TBA MtBE DIPE EtBE TAME 1,2-DCA7EDISTIEPCEMethanol <br /> Number Sampled (pg/L) (pg1L) (pglL) (pglL) (pglL) (jig/L) (pglL) (pglL) Comments <br /> MW-4 8/12/1998 NA <2,000 <20 <20 <20 <20 NA11/9/1998 NA <200 459 <2 <2 <2NA — <br /> 2/17/1999 NA <200 666 <2 <2 <2 NA — -- ~ <br /> 5125!1999 NA 212 646 <2 <2 <2 NA — -- — <br /> 8118l1999 NA 214 572 <2 <2 <2 NA <br /> 1211711999NA <200 58 6 <2 <2 <2 NA -- - — <br /> 2/22/2000 NA 255 622 <2 <2 <2 NA - ~ — <br /> 6/22/2000 NA <200 488 <2 <2 <2 NA — - <br /> 813012000 NA 392 90 <2 <2 <2 26---6 -- — — <br /> --TI-121/2000 NA <200 57 6 <2 <2 <2 <2 -- -' <br /> 2115!2001 NA <200 552 <2 <2 <2 <2 -- -- <br /> 5/17/2001 NA <1,000[2] 582 <10[2] <10[2] <10[2] <10[2] — -- <br /> 8/16/2001 NA <10,000[2] <100[2] <100[2] <100[2] <100[2] <100[2] — _ — <br /> 1216/2001 NA <5,000[2] <500[2] <500[2] <500[2] <500[2] <500[2] -- -- <br /> 2 <100[2] <100[2] 100121 <100[2]2/14/2002 NA <100[2] — <br /> — <br /> 8/22/2002 NA 310 100 <25 <25 <25 <25 <br /> 11/13/2002 NA <20,000 <500 <500 <500 <500 <500 — — -- <br /> 02/12/2003 <40 <20 <0 50 <0 50 <0 50 <0 50 <0 50 — -- — <br /> 05/29/2003 <25,000 <5,000 <120 <250 <250 <250 <120 — — -- <br /> <20,000 <4,000 <100 <200 <200 <200 <100 - ~ -- <br /> 08/04/2003 <5 0 R <2 5 R <br /> 11103!2003 <500 R <100 R <2 5 R <5 O R <5 O R -- ~ <br /> 0210912004 <10,000 <2,000 80 <100 <100 <100 <50 -- — — <br /> MW-5 11/17/1997 NA NA NA NA NA NA NA -- -- — <br /> 5/21/1998 NA <10,000 <100 <100 <100 <100 NA — -- <br /> 8/12/1998 NA <2,000 <20 <20 <20 <20 NA -- —11/9/1998 NA <200 <2 <2 <2 1 <2 NA — -- -- <br /> 2/17/1999 NA <200 <2 <2 <2 <2 NA -- — <br /> 5/25/1999 NA <200 <2 <2 <2 <2 - <br /> 811811999 NA <200 <2 <2 <2 <2 NA — ~ <br /> 1 211 711 999 NA <200 <2 <2 <2 <2 NA <br /> 6/22/2000 NA <200 <2 <2 <2 <2 NA — — — <br /> 8/30/2000 NA <200 <2 <2 <2 <2 <2 r <br /> 11/21/2000 NA <200 <2 <2 <2 <2 <2 — — <br /> 2/15/2001 NA <200 <2 <2 <2 <2 <2 -- ~ <br /> Report Date April 21,2004 Page 4 of 8 ' <br />