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• Cumulative Table of We4ata and Analytical Results Vertical Measurements are in feet Analytical results are In parts per billion b Well Ground Depth ." DATE Head Water To Notes TRH-Benzene Toluene Ethyl- Xylene MTBE TPH- TOG EPA EPA Other Elev Elev Water Gasoline Benzene EPA 8020 Diesel 8270 8010 MW-1 05124/96 1941 901 1040 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 <W <5000 <5 0-<10 <0 5-<5 0 08/20/96 1941 803 1138 -- <50 <0 5 <05 <0 5 <0 5 <2 5 <50 12,000 <5 0-<10 <0 5-<1 0 11/05/96 1941 856 1085 — <50 <0 5 <0 5 <0 5 <0 5 <25 <50 <5000 <5 0-40 <0 5-4 0 01/07197 1941 1025 916 — <50 <0 5 <0 5 <0 5 <0 5 <2 5 <50 <5000 <5 0-<10 <0 5-<5 0 02/07/97 1941 1043 898 — <50 <0 5 <0 5 <0 5 <0 5 <25 <50 <5000 ' <0 5-<5 0 ' 05/21/97 1941 846 1095 — <50 'Co 5 <0 5 <0 5 <0 5 <2 5 <50 <5000 ` <0 5-<5 0 08/27/97 1941 845 1096 — <50 <0 5 <0 5 <0 5 <0 5 <2 5 <50 <5000 <5 0-<10 <0 5-<5 0 11/24/97 1941 873 1068 — <50 <0 5 <0 5 <0 5 <0 5 <2 5 110" <5000 <5 0•<10 <0 5-<5 0 ` 02/1 MS 1941 1047 894 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 <50 <5000 <5 0-<10 <0 5-<5 0 ` MW-2 05/24196 1898 007 991 — <50 <0 5 <0 5 <0 5 <0 5 <2 5 <50 -- -- — -- 08/20/96 1898 798 1100 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 <50 — -- -- 11/05/96 1898 829 1069 — <50 <0 5 <0 5 <0 5 <0 5 <25 <50 -- -- -- -- 01/07/97 1898 1013 885 <50 <0 5 <o 5 <0 5 <0 5 <25 <50 — — -- - 02/07/97 1898 1025 873 — <50 <0 5 <0 5 <0 5 <05 <2 5 IC50 -- — — - 05/21/97 1898 825 1073 -- <50 <0 5 <0 5 'Co 5 <0 5 <25 <50 — -- — -- 08/27/97 1898 867 1031 — <50 <05 <0 5 <0 5 <0 5 <25 <50 -- -- — ' 11/24/97 1898 851 1047 -- <50 <0 5 c0 5 <0 5 <0 5 81- 02112)98 1•'02/12/98 1898 1155 743 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 <50 - - - -- MW-3 05/24/96 1788 863 025 -- <50 <0 5 <0 5 <05 c0 5 140 <50 -- - — -- 08/20/96 1788 797 991 — <50 <0 5 <0 5 <0 5 <0 5 190 <50 -- - -- -- 11/05196 1788 813 075 -- <50 <05 <0 5 <0 5 <0 5 250 <50 -- — -- 01/07/97 1788 926 862 -- <200 <20 <20 <2 0 <2 0 780 <50 -- -- - -- 02/07/97 1788 947 841 — <50 <0 5 <0 5 <0 5 <0 5 190 <50 — -- 05/21/97 1788 809 979 -- <50 <0 5 <0 5 <0 5 <0 5 57 <50 — — -- 08/27/97 1788 816 972 -- <50 <0 5 'Co 5 <0 5 <05 100 <50 -- — -- " 11/24/97 1788 833 955 — <50 <0 5 <0 5 <05 <0 5 240 130'" - — - 02112/98 1788 973 815 -- <100 <1 0 <10 <10 <1 0 250 <50 -- -- — See Table of Additional Analysis "Chromatogram pattern lndlcated an unidentifled hydrocarbon Blaine Tech Services,Inc 980212 C-2 1 st-Q 1998 Monitoring at Chevron 9-8264 3776 Tracy Blvd.Tracy,CA 1