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Cumulative Table of Well . and Analytical Results Vertical Measurements are in feet Analytical results are in parts per billion(ppb) ME GroundDepth DATE Head Water To Nates TPH- Benzene Toluene Ethyl- Xylene MTBE EDB DIESEL Motor Ort TOG Elev Elev Water Gasoline Benzene MW-4 09/05/90 1301 -4224 5525 — <50 <0 5 <0 5 <05 <0 5 _ <0 2 11129190 1301 -4250 5551 + <50 <0 5 <0 5 <0 5 <0 5 -- 03114/91 1301 -4276 5577 + <50 <0 5 <0 5 <0 5 <0 5 -- - -- -- - 06106!91 1301 -4262 5563 -- 630'* 0 5 10 <0 5 12 08/29/91 1301 -4326 5627 - 610* <0 5 <0 5 <0 5 <0 5 - - -- - -- 12/06/91 1301 -4212 5513 — 680*** 3 0 5 6 1 7 6 5 -- -- -- -- 03112!92 1301 -4084 5385 -- 1400* <0 5 <0 5 <0 5 <0 5 -- -- -- -- 06111192 1301 -4225 5526 — <50 <0 5 <0 5 <0 5 <0 5 - -- -- -- 09/03/92 13 01 -4342 5643 480* 0 7 <0 5 <0 5 1 7 -- -- -- — 12/17/92 1301 -4233 5534 — 4800 0 6 1 5 2 7 17 03/17/93 1301 -4044 5345 — <50 10 <0 5 <0 5 2 0 06/28/93 1301 -3902 5203 + <50 <0 5 0 9 <0 5 2 0 - - - - -- 06128/93 1301 -- -- - -- <5 0 <5 0 <5 0 <5 0 -- - -- - -- 09/15/93 1301 -3957 5258 - — — __ __ -- 09/29/93 1301 -- -- — 58* 70 80 2 0 9 0 — -- -- -- -- 12129/93 1301 -3841 51 42 -- <50 1 0 0 9 <0 5 10 -- -- -- -- 03/24/94 1301 -3647 4948 — <50 <0 5 10 <0 5 36 -- -- -- -- _ 06/16/94 1301 -3553 4854 -- <50 0 5 14 1 3 42 -- — -- -- 10/04/94 1301 -3643 4944 -- 2900* <5 0 <10 <10 <20 -- - -- 11108/94 1301 -3664 49 65 -- <50 0 5 15 1 0 35 -- - - -_ 03/14/95 1301 -3480 4781 -- 2700 <5 0 <5 0 <5 0 <5 0 -- -- -- -- 05/30/95 1301 -3350 46 51 -- 1700 <5 0 <5 0 <5 0 <5 0 08120/95 1301 -3365 4666 + 610* <0 5 <0 5 <0 5 <0 5 <2 5 -- -- -- — 08/20195 1301 -- -- — — <100 <100 <100 <100 -- -- 11/05/95 1301 -3326 4627 -- 1900' <5 0 <5 0 <5 0 <5 0 02/12196 13 01 -31 11 4412 - 460` <0 5 <0 5 <0 5 <05 — -- -- - -- 05/12/96 1301 -2865 41 66 230' <0 5 <0 5 <0 5 <0 5 <2 5 - - — -- 8112-13196 1301 -2898 41 99 + 2300* <5 0 <5 0 <5 0 51 <25 - 11111-12196 13 01 -2845 4146 + 940* <2 5 <2 5 <2 5 <2 5 <12 — — -- 02/24/97 1301 -2571 38 72 300* 10 <0 5 <0 5 <0 5 <2 5 - - -- 07120/97 1301 -2580 3881 -- 330* 0 62 <0 5 <0 5 <0 5 <2 5 -- -- -- 11/11/97 1301 -25 71 3872 -- 160" <0 5 <0 5 <0 5 <0 5 <2 5 - -- -- - CONTINUED ON NEXT PAGE *Chromatogram pattern indicates an unidentified hydrocarbon '*Gasoline range concentration reported, peaks are representative of tetrachloroethane and trace amount of gasoline ***Chromatogram pattern indicates an unidentified hydrocarbon and gas +See Table 3 Additional Analyses Blaine Tech Services Inc 991117-R-2 4th-Q 1999 Monitoring at Chevron 9-6 17 11 6633 Pacific Ave Stockton,CA 6 I