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. Cumulative Table of Wella and Analytical Results Vertical Measurements are in feet Analytical_results are in parts per billion(ppb) _ = Well Ground Depth DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene MTBE Elev Elev Water Gasoline Benzene MW-1 03/22/89 224 -1405 1629 - 30,000 3600 1300 1100 2700 -- 06/12/89 224 -1467 1691 -- 20,000 4400 1600 2900 5900 09/07/89 224 -1614 1838 - 20,000 4100 480 920 1500 12/18/89 224 -1536 1760 - 17,000 4200 200 17 1200 03/20/90 224 -1498 1722 -- 13,000 6400 580 2200 1200 -- 07/03/90 224 -1580 1804 17,000 4800 410 1300 1200 - 10/19/90 224 -1710 1934 -- 16,000 4800 290 1700 700 - 10/19/90 224 -- -- Duplicate 17,000 5600 270 1700 660 -- 01/17/91 2 24 -1680 19o4 -- 10,000 3100 38 950 170 -- 01/17/91 224 -- - Duplicate 9800 3200 39 980 170 03/19/91 224 -- -- 16,000 2900 45 960 290 - 07/18/91 2 24 -1696 1920 - 12,000 3300 90 1100 250 -- 07/18/91 224 -- -- Duplicate 12,000 3300 90 1100 250 -- 10/31/91 224 -1738 1962 9800 2600 18 720 180 - 01/16/92 224 -1658 1882 12,000 3600 54 960 370 03/11/92 224 -15 38 1762 -- -- -- -- -- 03/17/92 224 -1536 1760 9800 3600 150 700 360 -- 06/29/92 224 -1698 1922 7700 3000 33 600 230 -- 12/10/92 224 -17 52 1976 4900 1300 26 220 130 -- 02/04/93 224 -1042 1266 - 15,000 3100 70 920 540 - 05/18/93 224 -1362 1586 -- 8800 1900 120 730 840 - 08/05/93 224 -1450 1674 -- 29,000 9400 1800 2900 4900 - 11/09/93 224 -1500 1724 -- 13,000 3600 110 810 870 - 01/18/94 224 -14 74 1698 - 24,000 5600 100 1900 2300 -- 06/27/94 224 -1401 1625 8400 2300 59 520 700 - 09/29/94 224 -1520 1744 - 9600 2100 25 530 590 - 12/08/94 224 -1478 1702 5700 1300 19 290 260 03/08/95 224 -1252 1476 4600 1100 <25 230 280 -- 06/01/95 224 -1099 1323 27,000 4100 300 1800 4000 -- 09/11/95 224 -1293 1517 - 12,000 2400 140 790 1900 12/05/95 224 -1346 1570 8800 2500 32 450 710 - CONTINUED ON NEXT PAGE Blaine Tech Services, Inc 990913-K-1 3rd-Q 1999 Monitoring at Chevron 9-4275 2905 W Benjamin Holt Dr,Stockton,CA �