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TABLE SIX Summary of Chemical Analysis of GROUNDWATER for Samples From BP # 11194 West Grant Line Road, Tracy, California DATE TPH Ethyl Total Well I D SAMPLED Gasoline Benzene Toluene Benzene Xylenes MTBE TBA MW 4 5/23/01 2 700 135 539 775 281 471 NO 7/31/01 1 400 8 3 108 228 11 0 105 NO 10/30/01 390 406 1 93 0 526 < 1 50 25 3 ND 1/29/02 720 4 54 2 92 3 96 < 1 00 39 0 NO 4/30/02 2 100 4 11 3 74 329 <5 00 105 ND 7/30/02 1 100 108 1 19 335 621 395 NO 10/31/02 1 900 4 2 3 6 7 6 10 10 ND 1/30/03 600 1 4 <0 50 2 7 0 86 32 NO 4/30/03 1,200 0 84 <0 50 9 3 3 6 37 ND 7/30/03 260 < 1 2 <1 2 <1 2 <1 2 49 NO 10/29/03 1 300 3 4 < 1 0 5 5 <1 0 79 NO 1/26/04 770 <5 0 <5 0 <5 0 <5 0 16 230 4/28/04 130 <05 <05 <05 <05 84 <20 7/30/04 270 0 53 <0 5 069 <0 5 31 <20 10/28/04 2000 <5 0 <5 0 10 <5 0 120 <200 1/31/05 900 075 <5 0 2 9 058 35 <20 4/29/05 390 0 80 <0 5 0 92 <0 5 25 <20 7/29/05 220 0 72 <0 5 <0 5 <0 5 15 <20 10/28/05 910 3 0 <0 5 2 2 086 38 <20 1/26/06 240 <0 5 <0 S <0 5 <05 5 0 20 MW 5 5/23/01 120 0 653 <0 500 <0 500 < 1 50 6 19 NO 7/31/01 340 12 1 <0 500 0 527 <1 50 463 ND • 10/30/01 1 900 <5 00 <5 00 <5 00 < 150 2 180 NO 1/29/02 <50 <0 500 <0 500 <0 500 < 1 00 4 93 NO 4/30/02 100 <0 500 <0 500 <0 500 < 1 00 3 83 NO 7/30/02 600 232 <2 5 4 29 <5 579 NO 10/31/02 81 1 7 <0 50 <0 50 <0 50 13 NO 1/30/03 77 <0 50 <0 50 <0 50 <0 50 38 ND 4/30/03 74 <0 50 <0 50 <0 50 <0 50 14 NO 7/30/03 120 1 4 < 1 0 < 1 0 <1 0 67 NO 10/29/03 110 0 77 <0 5 <0 5 <0 5 18 NO 1/26/04 <50 <05 <05 <05 <05 12 <20 4/27/04 65 <05 <05 <05 <05 90 <20 7/30/04 <50 <05 <05 <05 <05 43 <20 7/29/05 <50 <05 <05 <05 <05 94 21 10/28/05 Sampled Annually in the 3rd Quarter 1/26/06 Sampled Annually in the 3rd Quarter MW 6 5/23/01 17,000 259 515 11 7 272 159 NO 7/31/01 14 000 186 4 58 3460 942 301 NO 10/30/01 13 000 202 <250 100 0 <750 1650 ND 1/29/02 12000 256 836 1450 269 344 NO 4/30/02 8,800 116 <12 5 548 <25 166 NO 7/30/02 NOT SAMPLED NO 10/31/02 44,000 270 1 200 510 2 100 1 800 NO 1/30/03 8 500 23 <0 50 65 <0 50 62 NO 4/30/03 4 900 35 <10 44 <10 80 NO 7/30/03 22 000 <25 <25 <25 <25 <25 NO 10/29/03 4 700 14 <2 5 23 <2 5 <2 5 < 100 1126104 7 400 10 <10 35 < 10 <10 <400 4/28/04 11 000 5 1 058 11 <0 5 2 3 <20 7/30/04 5 500 <25 <25 <25 <25 28 <1 000 10/28/04 9 800 < 12 < 12 < 12 <12 65 <500 1/31/05 3900 3 <25 47 <25 52 <100 4/29/05 2 500 12 < 10 <10 15 < 10 <400 • 7/29/05 l 600 < 1 0 < 1 0 < 1 0 < 1 0 1 9 <40 10/28/05 2700 <25 <25 58 <25 <25 <100 1/26/06 920 <0 5 <0 5 6 1 <0 5 61 <20