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0 i 0 - - Cumulative Table of Well Data and Analytical Results Vertical Measurements are in feet _ Analytical results are m parts per billion(ppb) e rounc Depth I otal DATE Head Water To SPH SPH SPH Notes TPH-Benzene Toluene Ethyl- Xylene MTBE TPN- TOG EPA EPA Other Elev Elev Water Thecknez Removed Removed Gasoline Benzene (EPA 8020) Diesel 8270 8010 MW-3 - 05/24/96 1788 8 63 925 -- - <50 <0 5 <0 5 <0 5 <0 5 140 <50 — _ — 08/20/96 1788 7 97 9 91 - - <50 <0 5 <0 5 <0 5 <0 5 190 <50 - - 11/05/96 1188 813 975 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 250 <50 01/07/97 1788 926 862 -- - — - <200 <2 0 <2 0 <2 0 <2 0 780 <50 -- -- - -- 02/07/97 1788 947 841 — - <50 <0 5 <0 5 <0 5 <05 190 <50 - -- - 05/21/97 1788 809 979 - - - -- <50 <0 5 <0 5 <0 5 <0 5 57 <50 - -- 08/27/97 17 88 816 972 - - -- <50 <0 5 <0 5 <0 5 <0 5 100 <50 -- - -- 11/24197 1788 833 955 -- -- -- -- <50 <0 5 <0 5 <05 <0 5 240 130** 02/12/98 1788 973 815 - -- -- — <100 <1 0 <1 0 <1 0 <1 0 250 <50 - - - 06/09/98 1788 5 13 1275 — -- -- - <50 <0 5 <0 5 <0 5 <0 5 90 <50 -- - _ 08/10/98 1788 827 961 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 77 <50 — - 11/24/98 1788 816 972 - -- -- -- <50 <0 5 <0 5 <0 5 <0 5 1000 <50 - -- - 03105/99 1788 888 900 - -- - <500 <5 0 <5 0 <5 0 <50 2840 63 1 06/01/99 17 88 830 958 -- -- -- 612 <0 5 163 8 2 534 3540 145** -- - — 08/30/99 1788 810 978 - -- -- ** <125 <1 25 <1 25 <1 25 <1 25 2830 <50 -- 11/23/99 1788 8 21 9 67 -- ** <2500 <25 <25 <25 <25 4380 82 6** MW-4 05/24/96 1789 8 82 907 -- — -- - <50 <0 5 1 8 <0 5 <0 5 91 <50 — -- - 08/20/96 1789 7 97 992 -- - — <50 <0 5 <0 5 <0 5 <0 5 120 <50 — - -- - 11/05/96 1789 847 942 - — -- <50 <0 5 <0 5 <0 5 <0 5 33 <50 - — - 01/07/97 1789 1005 7 84 — -- - <50 <0 5 <0 5 <0 5 <0 5 32 <50 02/07/97 1789 1006 7 83 - — <50 <0 5 <0 5 <0 5 <0 5 58 <50 - — 05/21/97 1789 835 954 - - — <50 <0 5 <0 5 <0 5 <0 5 140 <50 -- _ 08/27197 1789 833 9 56 -- - -- <50 <0 5 <0 5 <0 5 <0 5 45 110** -- -- - 11124197 1789 861 928 - - <50 <0 5 <0 5 <0 5 <0 5 21 1501* - 02/12/98 1789 11 19 670 - -- -- - <100 <1 0 4 5 <1 0 12 190 50** - -- -- - 06109198 17 89 351 1438 - — - <50 <0 5 <0 5 <0 5 <05 570 79** - 08/10/98 1789 846 943 -- - - - 150 33 1 7 <0 5 21 1100 <50 - - 11/24/98 1789 838 951 - — — <50 <0 5 <0 5 <0 5 <0 5 650 100** — 03/05/99 1789 914 875 — - 54 9 <0 5 <0 5 <0 5 <0 5 622 84 7** -- -- _ 06/01/99 1789 842 955 0 10 005 005 -- -- — — -- _ __ __ 08130/99 1772+ 826 948 0 03 005 010 *** ..- -- -- -- __ — 11/23/99 1772 846 926 -- -- 0 10 *** 105 000 590 17 500 3290 19 700 9370 45,300** - — - I See Additional Analyses Table 1 *`Chromatogram pattern indicated an unidentified hydrocarbon **`See Additional Analyses Table 2 +Elevation altered due to casing repairs Blaine Tech Services Inc 991123-A 3 4th-0 1999 Monitoring at Chevron 9 8264 3775 Tracy Blvd Tracy CA 2