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Table 2 Groundwater Analytical Results-Oxygenate Compounds 1 Former Tosco(Unocal)Service Station#6981 4707 Pacific Avenue ,r Stockton,California ,� WELL ID DATE METHANOL ETHANOL TBA MTBE D1PE ETRE TAME 1,2-BCA EDB (PPm) fp b) f b) (ppb) 1 b) (PP b) b) (ppb) (ppb) 11 VW-7 08/21/99 -- <2,500 <500 510 <10 <10 10/25-26/99 - -- <2 0 23 01127-28100 -- <100 75 <2 0 <2 0 <2 0 < { <40 0 <40 0 <40 0 <40 01 <40 0 06126-27100 -- -- <2,000 411 <2 0 4 Q <2 0 1<2 0 j� <2 0 09/22-23/00 <1 00 <500 <50 35 <100 <100 <100 �I100 <100 12/26-27/00 -- <50,000 <5,000 <100 03107-08101 <20,000 <2,000 <40 0 <40 0 <40 0 <40 0 40 6 r <40 0 06/26-27101 -- <25,000 <2,500 <50 <50 <50 <50 <50 'll <50 I I 09/12-13101 -- <25,000 <2,500 <50 <50 <50 <50 <50 1 <50 <33 <33 { <33 12112-13/01 -- <17,000 <670 <33 <33 <40 <40 <40 <2,000 <2 0 03/20-21/02 -- <10,000 <40 <40 <4 <2 0 06/06-07/02 <500 <too <2 0 <2 0 <2 0 <210 � 09/30102 -- <25,000 <5,000 <100 <100 <100 <100 <10011 <100 12/30-31/02 -- <25,000 <5 000 <100 <100 <100 <100 X100 ` <100 03/29-30/03 -- <100,000 <20,000 <400 <400 <400 <400 400IIC <400 06125-26/03 -- <5,0002 <1,000 <20 <20 <20 <20 �0 �' <20 09124-25103 -- <13,000 <2,500 <50 <50 <50 <50 <50 �< <50 PTW-1 01125-26/99 -- <500 X100 84 <2 0 <2 0 <2 004/19/-20/99 -- <500 <100 34 <2 0 <2 0 <2 0 -- -- 07/15-16199 -- -- <100 <2 0 <2 0 <2 0 <2i 0 -- 10/25-26/99 -- <100 <2 0 <2 0 <2 0 <2 0 - -- 01/27-28100 -- -- <100 <2 0 <2 0 C10 <2 0 -- 06/26-27100 -- -- 09/22-23/00 <1 00 <500 '<50 <2 0 <2 0 <2 0 <2 0 46 ` <2 0 12/26-27/00 -- <1,000 <100 <2 00 <2 00 <2 00 <2 o0 -- -- 03/07-08/01 -- <1,000 <100 <2 00 <2 00 <2 00 <2 X00 <2 00 <2 00 06/26-27/01 -- <1,000 7,100 18 <2 0 <2 0 <2 0 141 <2 0 09112-13101 -- <1,000 <100 20 <2 0 <2 0 <2 0 5 7 <2 0 12112-13101 -- <500 ;<20 75 <t 0 <1 0 4 0 49 ',< <1 0 03/20-21/02 -- <500 1 100 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 06/06-07102 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <2 0 1I <2 0 6981 x1s1*38 As*5/03 � q