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i 0 • - Cumulative Table of Well Data and Analytical Results Vertical Measurements are in feet Analytical values are in parts ber billion b Well Ground Depth DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylenes MTBE tert-Butanol Elevation Elevation Water Gasoline Benzene MW-3 9/22/92 2928 21 10 8 18 ND<50 0 7 1 4 ND<O 5 9 2 -- -- 2/93 2928 2241 687 ND<50 ND<O 5 3 9 ND<0 5 1 7 -- -- 5/2193 2928 21 91 737 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- -- 8/93 2928 21 41 787 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- 11/93 29 28 22 05 7 23 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- -- 9/9/94 29 28 21 45 7 83 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- 12/22/94 29 28 22 02 7 26 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- -- 3/15/95 29 28 2247 6 81 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- -- 9/20/95 29 28 21 21 807 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- -- 2/23/99 29 28 22 28 700 ND ND ND ND ND ND -- 6/27/99 2928 21 43 7 85 ND ND ND ND ND ND -- 8/31/99 2928 21 28 Soo ND ND ND ND ND ND -- 2/03/00 29 28 22 27 7 01 ND ND ND ND ND ND -- MW-4 9/22/92 27 06 2065 6 41 0 75" product on groundwater -- -- _- 2/93 27 06 22 32 474 45,000 7100 2600 440 7500 -- -- 5/2/93 27 06 21 76 530 32,000 6300 1700 380 5600 -- -- 8/93 2706 21 23 5 83 28,000 5400 810 320 3600 -- - 11/93 2706 21 94 5 12 41,000 2200 920 240 6800 -- -- 9/8/94 2706 21 28 5 78 2500 350 25 25 180 -- 12/22/94 27 06 21 91 5 15 3700 570 92 58 470 -- -- 3/15/95 27 06 22 54 452 22,000 4100 570 400 2600 -- -- 9/20/95 2706 21 00 606 Not Sampled -- -- __ __ -- 2/23/99 _2123199 27 O6 22 25 4 81 270 46 067 6 5 9 1 530 -- 6/27/99 27 06 21 41 5 65 ND 3 1 ND ND 073 160 -- 8/31/99 2706 21 10 5 96 ND 1 6 ND ND 077 240 -- 2/03/00 2706 21 78 5 28 ND ND ND ND ND ND -- I Parker Environmental Services, 190 East 7th Street, Pittsburg, CA 94565-2317 1 Phone (925) 439-1024 Fax (925) 439.2566