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Table 2 1 Groundwater Analytical Results-Oxygenate Compounds Former Tosco(Unocal)Service Station#6981 4707 Pacific Avenue u Stockton,California WELL,ID DATE METHANOL ETHANOL TSA MTBE DIPS ETRE TAME 1,2-DCA EDB (P m) (Ppb) (ppb) (Ppb) (ppb) (p b) (p b) (ppb) ( h) MW-14 06126-27101 -- <1,000 <]00 120 <20 <20 <20 36'' <20 I <1,000 <100 4 61 <20 <2 0 <2 0 <2 01 11 <2 0 (Cont) 09/12-13/01 -- <10 <10; <10 12112-13101 -- <500 <20 55 <l0 <10 <500 <100 38 <2 0 <2 0 <2 0 <2 Ot <2 0 03120-21102 -- <2 0 06106-07102 -- <500 <100 18 <2 0 <2 0 <2 0 <2 0 09/30/02 INACCESSIBLE-VEHICLE PARKED OVER WELL -- -- -- li- <2 4 12130-31102 -- <500 <100 <2 0 <2 0 <2 0 <2 0 <2 0, 20 03129-30103 -- <500 <100 93 <20 <20 <20 <2 11 <20 06n5_zFln� -- <snn <100 79 <2 0 <2 0 40 <20,1 '1 <20 r it i MW-15 08/21/99 -- <544 I <2p <20 10125-26199 -- -- <100 72 <2 0 <2 0 <2 4 � 1 <2 0 <2 0 01127-28100 -- <100 11 7 2 06126-27100 -- -- <100 523 <2 40 Q <2 0 00 <2 00 � 3 571+ 09122-23100 <1 00 <500 <50 14 <2 0 <2 0 <2 0 i <2 0 <2 0 12126-27/00 <1,000 <100 ` 168 <2 00 <2 00 <2 00 <2 00 <2 00 03107-08101 - <1,000 <100 28 1 <2 00 <2 00 <2 00 C2 00 <2 00 06126-27101 -- «000 <100 24 <2 0 <2 0 <2 0 <2 0 <2 0 09112-13/01 -- <1,000 <100 28 <2 0 <2 0 <2 0 <2 0 <2 0 � 12112-13101 -- <500 <20 48 <1 0 <1 0 <1 0 1 25, <1 0 03120-21/02 <500 <100 65 <2 0 <2 0 <2 0 I 6 1 II <2 0 06106-07102 -- <500 <100 53 <2 0 <2 4 <2 0 6 811 <2 0 09/30/02 -- <500 <100 64 <2 0 <2 0 <2 0 7 9�[ <2 0 12130-31102 -- <500 <100 91 4 0 <2 0 <2 0 i 7 911 <2 0 03129-30103 -- <500 <100 98 <2 0 - <2 0 <2 0 701,1 <2 0 06/25-2610 -- <500 <100 91 <2 0 <2 0 <2 0 621 <2 0 � I MW-16 08/21/99 <500 <100 69 <2 0 <2 0 <2 0 -- 10/25-26/99 -- -- <200 100 <4 0 <4 0 <4 0 i 76 <4 0 01/27-28/00 -- -- 120 130 <2 0 <2 0 <2 0 11 <2 0 S 06126-27/00 -- -- <200 737 <4 00 <4 00 <4 00 577 <2 00 fi981 xl`�13fi I� A*126103 I