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F Table 2 Groundwater Analytical Results-Oxygenate Compounds Former Tosco(Unocal)Service Station#16981 4707 Pacific Avenue Stockton,California WELL ID DATE 1VMET1IIANOL ETHANOL THA MTBE DIPE ETIat TAME 112-DCA EUR ( m) kb) (ppb) (ppb) (ppb) b} ( b) ( b) (PPO r VW4 12/08/97 WELL CONNECTED TO VES -- -- -- '- -- 03/05/98 -- <500 <100 39 <2 0 <2 0 <2 0 -- -- 05/27/98 -- <1,250 <250 <5 0 <5 0 <5 0 <5 0 — -- 07/21/98 -- <500 170 <2 0 <2 0 <2 0 <2 0 --<66 <66 <66 -- <16,500 <3,300 <66 -- i 10/14/9$ -- -- _ 01/25-26/99 -- <500 610 15 <2 0 <2 0 <2 0 -- 04/19/-20199 -- <2,500 <500 15 <10 <10 <10 -- -- 07/15-16/99 -- -- 440 19 <10 <10 <10 -- -- 10/25-26199 -- -- 260 27 <2 0 <2 0 <2 0 --01/27-28/00 -- -- 170 51 <2 0 <2 0 <2 0 -- 06/26-27/00 -- -- 1,080 1,110 <20 0 <20 0 <20 0 -- -- 09/22-23/00 <1 00 <500 <50 160 <2 0 <2 0 <2 0 <2 0 <2 0 12/26-27/00 — <5,000 <500 172 <10 0 <10 0 <100 -- -- 03107-08/01 -- <2,000 227 321 <4 00 <4 00 <4 00 <4 00 696 06/26-27/01 -- <17,000 <1,700 330 <33 <33 <33 433 <33 09/12-13/01 -- <5,000 <500 310 <10 <10 <10 <10 <10 12112-13101 -- <1,000 <40 270 <2 0 <2 0 <2 0 <2 0 <2 0 03120-21/02 -- <500 <100 36 <2 0 <2 0 <2 0 <2 0 <2 0 06/06-07102 -- <500 <100 40 <2 0 <2 0 <2 0 <2 0 <2 0 09/30/02 DRY -- -- -- -- -- -- — -- 12/30-31102 DRY — — — — — — VW-7 08/21/99 -- <2,500 <500 510 <10 <10 <10 — — 10/25-26/99 -- -- <100 47 <2 0 <2 0 <2 0 <2 0 <2 0 o 01127-28100 -- -- <100 75 <2 0 <2 0 <2 0 <2 0 23 06126-27100 -- — <2,000 41 1 <40 0 <40 0 <40 0 <40 0 <40 0 09/22-23/00 <1 00 <500 <50 35 <2 0 <2 0 <2 0 <2 0 <2 0 12/26-27100 -- <50,000 <5,000 <100 <100 <100 r<100 <100 <100 03107-08/01 — <20,000 <2,000 <40 0 <40 0 <40 0 <40 0 <40 0 <40 0 06/26-27/01 -- <25,000 <2,500 <50 <50 <50 <50 <50 <50 ` 09/12-13101 -- <25,000 <2,500 <50 <50 450 <50 <50 <50 12112-13/01 -- <17,000 <670 <33 <33 <33 <33 <33 <33 I 6981 A138 0 A&/31102