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Table 2 Groundwater Analytical Results-Oxygenate Compounds Tosco(Circle K)Unit#01205 16474 Cambridge Street Lathrop,California WELL ID DATE METHANOL ETHANOL TBA MTBE DIPE ETRE TAME 1,2-DCA EDB F (P b) (Ppb) (ppb) (Pb) (ppb) (Ppb) (ypb) (ppb) (ppb) <50,000 <1,000 <1,400 <1,000 <1,000 <1,000 <1,000 MW-6 07/29/02 Q50,000 <500 230 <10 <10 <10 <10 <10 <2,500 (cont} 10/25/02 - <10 <10 <10 I 01124103 -- <2,540 <500 260 <!0 <l0 <20 <20 <20 <20 <20 04/25/03 -- <5,000 <1,000 240 <40 <40 <40 <40 <40 I 07/25/03 <500 <10,000 <2,000 320 I MW-'7 01/08/01 -- ND1 NDI NDI NDI NDI NDI NDt ND' ' ND' NDI ND' ND' NDI 04/26/01 -- NDi ND' i t S NDS 07/19/01 ND NDI NDNDI NDND! NDND <12,0fl0 <500 <25 <25 <25 <25 <25 <25 10/25/01 -- 01/29/02 <8,300 <1,700 <33 <33 <33 <33 <33 <33 44/29/02 -- <14,000 <2,000 <40 <40 <40 <40 <40 <40 07/29/02 __ <250,000 <50,000 <1,000 <1,000 <1,000 <1,000 <1,000 <1,000 10/25/02 -- <25,000 <5,000 <100 <100 <100 <100 <100 <100 01124103 -- <25,000 <5,000 <100 <100 <100 <100 <100 <100 04/25/03 -- <25,000 <5,000 <100 <100 <100 <100 <100 <140 07/25/03 <500 <25,000 <5,000 <100 <100 <100 <100 <100 <100 MW-8 01/08/01 -- ND ND ND ND ND ND ND ND � 04/26/01 -- ND ND ND ND ND ND ND ND 07/19/01 -- ND ND ND ND ND ND ND ND i 10/25/01 -- <500 <20 <10 <10 <10 <10 <10 <10 01/29/02 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 I 04/29/02 -- <500 <100 <2 0 _ <f <2 0 <2 0 <20 <2 0 ' 07/29/02 -- <500 <100 <20 <20 <20 <20 <20 <20 10/25102 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 01124103° -- <2,500 <500 <10 <10 <10 <10 <10 <10 04/25/03 -- <500 <100 <2 0 <2 4 <2 0 <2 0 <2 0 <20 07/25/03 <500 <500 <100 <20 <2 0 <20 <2 0 <2 0 <2 0 I 01205xisl#180183 40 A007/25/03