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Table 2 Groundwater Analytical Results-Oxygenate Compounds Former Tosca(Unocal)Service Station#6981 4707 Pacific Avenue } Stockton,California it WELL ID DATE METHANOL ETHANOL TBA MTBE DIPS ETRE TAME 1,2-DCA EDB Pn�) (ppb) Pb) (Pb) ( b) (pp (ppb) (ph) (P b) VW-4 09122-23100 <1 00 <500 <50 160 <2 0 <2 0 <2 b <2 0 <2 0 (cnnl) 12126-27/00 -- <5,000 <500 172 <100 <10 0 <100 -.p 0 -- <4 00 <4 00 <4 00 1 <4 00 696 3107-08101 <2,000 227 321 <17,000 <1,700 330 <33 <33 <33 <�al <33 a61z6-z7ro1 -- <ro 09112-13101 <5,000 <500 310 <10 <10 <10 <2 0 <2 0 <2 0 <2 0 12112-13101 -- <1,000 <40 270 <2 0 <2 0 <2 011 03120-21102 -- <500 <100 36 <2 0 <2 0 <2 0 06/06-07102 -- <500 <!00 40 <2 0 4 0 Q 0 <2 0 <2 0 11 09/30/02 DRY -- 12/30-31/02 -12/30-31/02 DRY -- -- -- -- -- --l <500 <100 <2 0 03129-30103 -- <2 0 <2 0 <2 0 <2 0 i <2 Or 06/25-26103 NOT SAMPLED DUE TO INSUFFICIENT WATER I �I� VW-7 09/21/99 -- <2,500 <500 510 <10 <10 <10 -- 10125-26199 -- -- <100 47 <2 0 <2 0 <2 0 <2 0 <2 0 01127-28100 -- <100 75 <2 0 <2 0 <2 0 <2 0 23 06/26-27100 -- -- <2,000 41 1 <40 0 <40 0 <40 0 1 <40 0 <40 0 09122-23/00 <1 00 <500 <50 35 <2 0 <2 0 <2 0 <2 0 <2 0 12126-27100 -- <50,000 <5,000 <100 <100 <100 <100 j <100 <100 03/07-08101 -- <20 000 <2,000 <40 0 <40 0 <40 0 <40 0 <40 0 <40 0 06126-27101 <25,000 <2,500 <50 <50 <50 <50 <50 <50 09112-13101 -- <25,000 <2,500 <50 <50 <50 <50 <50 <50 12112-13101 -- <17,000 <670 <33 <33 <33 <33 <33 <33 03120-21102 -- <I0,000 <2,000 <40 <40 <40 <40 f <40 <40 06/06-07/02 <500 <100 <2 0 <2 0 - <2 0 <2 0 ; <2 0 <2 0 09/30/02 -- <25,000 <5,000 <100 <100 <100 <100 <100 <100 12130-31102 -- <25,000 <5,000 <100 <100 <100 <100 i <100 <100 03/29-30103 -- <I00,000 <20,000 <400 <400 <400 <400 <400 <400 11 06125-26103 -- <5,0002 <1,000 <20 <20 <20 <20 <20 <20 I I OR] x10139 /26/03