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Table 2 Groundwater Analytical Results-Oxygenate Compounds Tosco(Circle K)Unit#01205 16470 Cambndge Street Lathrop,California WELL 11) DATE METHANOL ETHANOL, TBA MTAE RIPE ETat TAME 1,2-DCA Elba (P b) (ppb) (Pb) (PPb) (Pb) (PIN (Pb) (Ppb) (Ppb) 3 f <500 <20 <10 <10 <10 <10 <10 <10 Mw4 1 0/25111 (cont) 01/29/02 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <z o <z 0 <20` <20 <20 <20 <20 04/29/02 -- <500 <100 -<2 0 <40 <41 <40 <40 <4Q 07/29/02 -- <10,000 <2,000 <40 <5,aoo <1,000 <20 <20 <20 <20 <20 <20 11/25/02 -- <2 0 <2 0 01124103 -- <500 <100 <2 0 <2 0 1 <2 0 <2 0_ MW�5 01/01/01ND' NDI 27 NDI ND' NDI NDI ND' I MW-5 11/08/01 -- ND'' NDI NDND ND' E ' ND' 04126/Q1 -- E NDI ND' - ND' ND' NDND' 07119/01 NDI ND 1 fl < p <55 10/25/01 -- <25,000 <1,000 <50 <50 <50 <<S50 E <50 <50 01/29/02 -- <5,000 <1,000 <20 <20 <20 <l00 04/29/02 __ <25,000 <5,000 <100 <100 <100 <100 <100 45,000 <5,000 <100 <100 <100 <100 <100 <100 07/29/02 - _ <]00 <101 10/25/02 - <25,000 <5,000 <100 <100, <100 <100 I 01/24/03 -- <250,000 <50,000 <1,000 <1,000 <1,000 <1,000 <1,000 <1,000 i MW-6 01/08/01 -- NDE ND' 750 ND' ND' ND' ND' NDI E 1 ' i 1 t 04/26/01 ND' ND 613 ND ND NDI NDI ND' 07/19/01 -- ND' NDI 310 ND' ND' ND ND ND 10/25/01 -- <12,000 <500 660 <25 <25 <25 <25 <25 11/29/02 <12,000 <2,500 640 <501 <50 <50 <50 <50 -- <5 0 <51 <5 0 <5 p <5 0 ' 04/29/02 -- <1,200 <250 310 1,000 <1,110 <1,001 <1,000 <1,000 <250,000 <50,000 <1,000 < 07/29/02 -- 10/25/02 -- <2,500 <500 230 <10 <10 <10 <10 <10 01/24/03 -- 4,500 <500 260 <10 <10 <10 <10 <10 MW-7 01/08/01 -- ND' ND' ND' ND' ND' ND' NDI ND' 04/26/01 -- NDI ND' ND' NDI NDI ND' NDI ND' 07/19/01 -- ND' ND' ND` ND` ND' ND' ND' ND' 012059 80183 1001/24/03