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Cumulative Table of Well Data and Analytical Results ADDITIONAL ANALYSES Analytical values are In parts per billion(ppb) DATE Notes 2,4- 2- 4- Nap Phenol Ca Cr Pb Ni Zn EPA Meth Eth t-But MTBE DIPS ETBE TAME Dim MnPht MnPht 8260 EPA 8260 t MW-1 05!24!96 -- -- - - -- <10 <10 <100 <50 13 -- -- 08/20196 w _ .. .. -- - <10 <10 <100 <50 53 -- - - -- - - - 11/05196 - - -- -- -- -- <10 <10 <100 <W 22 -- -- -- - - -- -- 01107197 -- - _. -- -- - <10 <10 <100 <50 79 -- - -- -- - -' - 02/07/97 -- 20 21 15 20 30 <10 <10 <100 <50 <10 - -- -- - - -- 05/21/97 -- <50 <5 0 <50 <50 <50 <10 10 <100 <50 31 -- -- - -- 0827197 -- <50 <5 0 <50 <50 <5 0 <10 <10 <100 <50 24 <2 0-<5 0 <1000 <500 <100 <2 0 <2 0 <2 0 <2 0 1124197 -- <50 <50 <5 0 <5 0 <5 0 <10 <10 <50 <50 74 -- -- <500 <100 <2 0 <2 0 <20 <20 MW-2 0827/97 -- _ -- -- .. _ _ _ -- <2 0-4 0 <1000 <500 <100 <2 0 <2 0 <20 <2 0 11/24/97 -- - - _. -- _ .. -- -- -- -- - <500 <100 33 <20 <2 0 <20 MW-3 08/27/97 -- -- — -- -- -- - -- — -- <2 0-4 0 <1000 <500 <100 130 <20 <20 <20 11/24/97 -- -- -- -- -- ._ .. — -- -- -- <1200 <250 290 <5 0 <50 <50 MW-4 08/27/97 -- -- -- . -- -- - -- -- - - <2 0-4 0 <1000 <500 <100 20 <2 0 50 <20 11/24/97 - -- -- -- -- -- .. -. - -- -- -- <500 <100 24 <20 28 <20 Note Blalne Tech Services,Inc began routine monitoring of the groundwater wells at this site an May 24, 1996 Wellhead survey performed by Ron Archer,Civil Engineer Inc ABBREVIATIONS. TPH-Total Petroleum Hydrocarbons 4-MnPht-4-Methylphenol Cr•Chromium Meth-Methanol MTBE-Methyl t-butyl ether 2,4-01m-2,4-Dimethylphenol Pb•Lead Eth-Ethanol TOG-Total oil&Grease DIPS DI-Isopropyl Ether Nt.Nickel t-But-t-Butanol Nap-Napt odene ETBE= Ethyl t-Butyl Ether Zn-Zinc Ca-cadmium TAME t-Amyl Methyl Ether 2-WPht-2 Methylphenol Blaine Tech Services,Inc.9711245-1 4th-O 1997 Monitoring at Chevron 98264 3775 Tracy Blvd,Tracy,CA 3