ARCHIVED REPORTS_XR0008044 CASE 1

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Table 2 Fuel Oxygenates Analytical Data Former BP Service Station No 11194 2375 Tracy Blvd, Tracy, CA Well Date Ethanol TBA MtBE DIPE ELBE TAME Number Sampled (N91L) (pg/L) (pg/L) (pq/L) (Ng1L) (pg/L) Comments MW-2 4/12/2001 -- 1100 700 ND<10 ND<10 ND<10 7130/2002 -- -- 586 — - — 10/31/2002 -- 13 — -- -- 01/30/2003 -- -- 79 — — 04/30/2003 - 290 -- -- -- 07130l2003 <500 <100 65 <50 <5 0 <5 0 10/29/2003 <100 <20 055 <1 0 <1 0 <1 0 01/26/2004 <100 95 91 <10 <10 <10 04128!2004 <100 <20 <0 50 MW-3 4/12/2000 -- -- 28 ND<10 ND<10 ND<10 7/22/2000 -- ND<50 15 ND<5 0 ND<5 0 ND<5 0 10/26/2000 -- 11 67 ND<10 ND<10 ND<10 1/17/2001 -- ND<10 77 ND<l0 ND<10 N0<10 4/12/2001 -- 11 99 ND<10 ND<10 N0<10 7/30/2002 -- -- 1280 --10/31/2002 -- -- 88 -- - 01/30/2003 -- -- 15 -- -- — 04/30/2003 -- -- 99 -- -- -- 07/30/2003 <100 210 29 <1 0 <1 0 <1 0 10/29/2003 <100 300 51 <10 <10 <10 01/26/2004I <100 450 15 <10 <10 <10 04127/2004 <100 480 27 <1 0 <1 0 <1 0 MW-4 4/12/2000 -- — 58 ND<l0 ND<10 ND<10 7/22/2000 ND<100 61 ND<10 ND<10 ND<10 10/26/2000 18 82 ND<10 ND<10 ND<10 1/17/2001 - 70 100 ND<10 ND<10 ND<10 4/12/2001 - 130 440 ND<10 ND<10 12 7/30/2002 -- -- 395 — -- -- 10/3112002 -- 10 -- -- 01/30/2003 -- 32 -- -- -- 04/30/2003 -- -- 41 -- — -- 07/30/2003 <250 <50 49 <2 5 <2 5 <2 5 10/29/2003 <200 <40 79J <2 0 <2 0 <2 0 01/26/2004 0,000 230 16 <10 <10 <10 04/28/2004 <100 <20 84 <1 0 <1 0 <1 0 MW-5 01/30/2003 -- -- 38 -- -- — 04/30I2003 -- -- 17 -- — --- 07/30/2003 <200 <40 67 <2 0 <2 0 <2 0 10/29/2003 <100 <20 18 <10 <10 <10 01/26/2004 <100 <20 12 <10 <10 <10 04/27/2004 <100 41 90 <1 0 <1 0 <1 0 MW-6 4/12/2000 -- -- 150 ND<10 ND<10 ND<10 7/22/2000 -- ND<500 890 ND<50 ND<50 ND<50 10/26/2000 -- N130000 910 ND<100 ND<100 ND<100 4/12/2001 - ND<100 ND<10 ND<10 ND<10 ND<10 7/30/2002 -- -- — -- — — 10/31/2002 1,800 — -- -- Report Date July 13, 2004 Page 2 of 4