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Table 2: Monitoring Well Sampling Results McMullin Dehydrator Station San Joaquin County Results Expressed in Ng/L sample Total TPH- TPH- TPH- TPH- Total Location Date Benzene Toluene Ethylbenzene Xylenes gasoline diesel kerosene' motor oil Naphthalene Benzo(a)pyrene Lead M-2R-DUP 07/162003 0.5 u 0.5 U 0.5 U 0.5 U W U 50 U - 500 U - - - 04/182003 0.5 U 0.5 u 0.5 u 0.5 U 50 U 75 - 503 U - k MW-2 07/082002 42 3.4 1.2 120 990 150 - SW u - - - 04/252002 72 14 530 490 3000 J 550 - SCO U - 08132002 140 34 33D 550 3400 2500 - 74 - - - 111062001 ISO 96 430 1300 5500 2100 5OU - - - 08142001 0.81 79 10 44 590 160 - 50 UJ - - - 051192001 17 5 u 130 170 1800 1600 - - - - 5 U • 0805200185 58 380 880 4000 3600 - - - 5 U 111MOOO 130 26 550 860 4300 1200 - - 5U OW12000 57 1.9 44 90 930 740 - - - 5 U 05117/2000 16 3.1 89 160 2200 6600 - - - 5 U 08172000 19 11 210 350 2400 790 - - - 5 u 11/17/1999 1300 430 4900 5600 38000 5500 - - - 08/1911999 15 11 58 140 4000 3200 - - - - 052811999 78 28 270 490 3700 6400 - - - 02/24/1999 27 27 160 760 4200 3400 500 U - 181671998 260 270 1500 3400 14000 14000 - 500 - - - 1124/1998 320 420 1700 5200 1900D 8800 SCOU - - - 10r1071998 460 320 820 3700 10000 7000 - 500 U - - IMI/1998 11 18 17 70 3000 8300 - 5000 0,2811998 171 25 U 189 750 48700 21800 - 1000 U - - 0720/1998 284 82.3 586 1950 32700 49100 - - - W19/19% 360 110 400 2200 16000 50 U 5W U - - 11//311997 710 140D 8200 19000 9JU 18NDOO - 280000U - - N MN-2-OUP 08/1971999 13 4.9 52 150 1400 1800 - - - - W19/1998 370 110 420 2300 17000 50U - 5000 - - S MW3 041182003 01237003 0.5 U OS U 0.5 u 0.5 u so u 50 u - 500 U - - 1022J2002 0.5 U 4 0.5 U 3.1 50 U W U - 500 U - - - 071022002 05 U OS U 05U 0.5 U 51 U 50 U 500 u - - 04292002 0.5 U 0.5 U 0.5 U 0.5 u 50 u 50 U 500 u - 08132002 as 0.5U 05U OSu 50U 50u - 50U - 111062001 0.50 05 u 0.5 U 0.5 U sou W U - 50 U - 08/142001 0.5U 05U U 0.5U `✓JU 50U - 50 UJ - - Wednesday,June 23, 2004 Page 2 of 8