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0Page 5 of 6 i I Table 2 Fuel Oxygenates Analytical Data ARCO Service Station 04932 16 E Harding Way Stockton CA Wen cam;3Date a ! +s TBA r° ��' MtBE*`e -�-`DIPE';� '� EtBE TAME 1,2-DCA EDB Ethanali ; NuniberkzoSampledzppb) (ppb) =(pPb) '- ;w ippb) -'(ppb) (ppb) (ppb) (Ppb) i DMW-1 04/11/02 93 140 <2 5 <2 5 <2 5 25 <2 5 — 07/12/02 <50 64 <5 0 <5 0 <5 0 -- -- 11/20/02 <20 21 13 <0 50 <0 50 43 <0 50 — 01/30/03 Well unable to be sampled located in consWcbon area 04/28/03 <20 13 13 <0 50 <0 50 37 <0 50 <100 07/28/03 <20 52 34 <0 50 <0 50 90 <0 50 <100 10/08103 <20 33 50 <0 50 <0 50 12 <0 50 <100 01/13/04 <20 25 42 <0 50 <0 50 76 <0 50 <100 I 04128/04 <40 2.2 24 <1 0 <1 0 67 <1 0 <200 DMW-2 07/12/02 <5 0 85 <0 60 <0 50 <0 50 — — — 11120102 <20 64 <0 50 <0 50 <0 50 <0 50 <0 50 — 01/30103 <20 33 <0 50 <0 50 <0 50 <0 50 <0 50 V0 04128/03 <20 076 <0 50 <0 50 <0 50 <0 50 <0 50 <100 07!28103 <20 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <100 10108/03 <20 14 <0 50 <0 50 <0 50 <0 50 <0 50 <100 01/13/04 <20 13 <0 50 <0 50 <0 50 <0 50 <0 50 <100 04128/04 <20 2A <0 50 <0.50 <0 50 071 <0 50 <100 1 DMW-3 07/12102 <50 140 <5 0 <5 0 <5 0 — — — 11/20/02 <20 16 <0 50 <0 50 <0 50 42 <0 50 — 1 01/30/03 <20 37 <0 50 <0 50 <0 50 <0 50 <0 50 <40 I 04/28/03 <20 so <0 50 <0 50 <0 50 32 <0 50 <100 1 07/18/03 <20 3 0 <0 50 <0 50 <0 50 48 <0 50 <100 10!09!03 <20 24 <0 50 <0 50 <0 50 36 <0 50 <100 01/13/04 <20 1 1 <0 50 <0 50 <0 50 26 <0 50 <100 I 04!28!04 <20 31 <0.50 <0 50 <0 50 28 <0 50 <100 EW-1 04/11102 <25 000 520 000 <2 500 <2 500 <2 500 <2 500 <2 500 — 07112102 2 800 460 000 150 <100 260 -- -- -- 11120102 Not sampled LPH sheen present 01/30/03 <100 000 200 000 <2 500 <2 500 <2 500 <2 500 <2 500 <200 000 1 04/28/03 Well unable to be sampled connected to remedial system ' 07129/03 <20 000 97 000 <500 <500 <500 <500 <500 <100 000 ' 10/09/03 <10 000 25 000 <250 <250 <250 <250 <250 <50 000 01/13/04 <10 000 17 000 <500 <500 <500 <250 <250 <50 000 04128/04 <10,000 5,800 <260 <250 <250 <250 <250 <50,000 I EW-2 07/12/02 <10 000 65 000 <1 000 <1 000 <1 000 — — — I M0102 3 600 90 000' <50 <50 120 <50 <50 -- 01/30103 <4 000 61,000 <100 <100 <100 <100 <100 <8 000 04/28/03 <20 000 55 000 <600 <500 <500 <500 <500 <100 000 07129/03 <20 000 50 000 <500 <500 <500 <500 <500 <100 000 10/09103 <20 000 23 000 <500 <500 <500 <500 <500 <100 000 01/13/04 <40 000 38 000 <2000 <2000 <2000 <1000 <1000 <200 000 04128!04 8,300 17,000 <5 0 <50 27 8A <60 0,000 I Project/ARC014932Meponerable 1 004 gwLables4932ads I