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TABLE 2 Historical Groundwater Analytical Results Compass Group VSA, Inc 1500 Shaw Road Facility Stockton, California Ethyl- 8260 OXYGENATES Benzene Toluene benzene Xylenes TPH-G TBA MTBE DIPE ETBE TAME 1,2 DCA EDB Well Date (µg/L) (pg/L) (ug/L) (ug/L) (µg/L) (ug/L) (pg/L) (ug/L) (lug/L) (µg/L) (pg/L) (aIL) CAMCL 100 150 00 700 00 1750 00 NE NE 1300 NE NE NE 0 50 005 MW-3 06/03/93 8,600 70 06 70 22,000 -- -- -- -- -- -- 09/20/93 15,250 4,500 35 1,100 45,000 -- -- -- --- - -- -- 01/27194 9,700 420 41 620 35 000 -- --- -- -- 04/21/94 7,000 44 ll 140 14,000 --- -- -- -- --- -- -- 08/01/94 7,200 310 22 430 29,000 -- -- -- --- -- -- 12/13/94 7,700 800 60 500 33,300 03/29/95 4,550 703 19 509 j 14,800 -- -- -- -- --- -- -- 08/31/95 7,560 690 28 1,018 40,000 -- -- -- -- --- -- -- 12/19/95 3,820 68 13 150 14,400 04/05/96 --_ —_ -- __ -__ _- -- -- -- _-- -- -- 06/27/96 -- -- — - - -- — -- -- - -- — 07/25/96 75 43 18 6 1,890 12/03/96 11 30 14 7 1,370 03/27/97 --- --- -- --- --- 07/03/97 --- --- - --- --- 10/10/97 ND 04 ND 09 212 <20 19 <50 <50 <50 -- 01/30/98 06 04 03 05 t81 <20 18 <50 <50 <5 0 --- 06/06/98 <03 <03 <03 <03 <50 <20 13 <50 <50 <50 --- 06/08/99 14 4 8 098 5 5 50 1 <5 29 <1 <1 <1 -- -- 03/29/00 93 09 12 28 400 -- -- --- -- -- -- -- 09/25/00 1-4 <05 <05 <05 104 <50 <5 0 <50 <50 <50 <5 0 <50 12/12/00 075 11 <05 <05 <50 <50 42 <10 <10 <10 <10 <10 03/07/01 1 6 4 8 1 3 24 280 <50 82 <10 <10 <10 <1 0 <1 0 05/10/01 <05 <05 <05 <05 <50 <50 10 <10 <10 <10 <10 <10 08/15/01 <05 13 <05 <05 82 <50 19 <10 <10 <10 <10 <10 11/08/01 35 4l 2 42 190 <12 5 98 <25 <25 <25 <25 <25 02/07/02 1 5 1 1 13 1 4 110 <50 35 <1 0 <10 <10 <10 <1 0 05/09/02 68 3 8 21 27 280 <25 86 <25 <25 <25 <25 <25 08/01/02 <05 <05 <05 <05 <50 <50 24 <0 5 <0 5 <05 <05 <05 10/31/02 49 29 067 1 3 140 <25 120 <25 <25 <25 <2 5 <25 02/13/03 35 <25 <25 1 <25 1 170 1 <25 84 <25 <25 1 <25 <25 1 <25 CAMC4 Cahfomia Maximum Conlaminal Level NE None Established 3 of 16