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Table 1 Groundwater Elevation�alytital Data Chevron Bulk Fuel Te1111 l 61001621 Pag�f 27 22888 South Kasson Road Banta California Well Groundwater Depth SPH SPH Total SPH TPH as Ethyl- Total TPH as Total Diss Well Date Elevation Elevation To Water Thickness Removed Removed Gasoline Benzene Toluene Benzene Xylenes Diesel Lead MtBE Lead Number Gauged (feet MSL) (feet MSL) (feet TOC) (feet) (gallons) (gallons) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) DE-6 11/04/96 — — 498 015 008 008 — - - — - — -- — — 02/05/97 — — 0,93 004 001 009 -- — - — — _ 05/12/97 299 — — 009 5500 <2 0 <2 0 <20 <2 0 54,000 — <20 <5 0 f 08/13/97 — — 421 — - — -- — -- — -- — 11/04/97 — — 468 - - 02/09198 -- — 072 — - — -- — _ 05/26/98 — -- 322 -- 08!24198 — — 388 -- 11/16/98 -- -- 474 — — — — — -- — — -- — - — 02/22/99 — — 379 -- — — — — — — — — DE-7 11/04/96 — — 630 066 013 013 — — — - — — -- — -' 02/05/97 — — 1 39 004 001 — - — - — — -- — -" — 05/12/97 — — 364 — -- 014 150000 <10 <10 <10 <10 280000 00 — <100 <50 08/13/97 — — — Well Buned by Asphalt — — — — — _ — — 11104197 — — 479 — 02109198 -- — 069 - - 05126/98 — — 265 — — -- — -- — "' -- — — 08/24/98 — — 396 - — - — — -" — — -- — — 11/16/98 — -- 488 — - — — — - — -- `- — 02/22/99 -- -- 344 - — — — — — - — - — Chromatogram pattern indicates an unidentified hydrocarbon SPH=Separate-Phase Hydrocarbon TPH=Total Petroleum Hydrocarbons MtBE=Methyl tertiary Butyl Ether Diss =Dissolved FOC=Top of Casing a =Samples filtered by a 0 7 micron glass filter =MtBE confitmation by EPA Method 8260 ppb=Parts Per Billion =Not Analyzed ND=Not Detected Groundwater elevation corrected for the presence of separate-phase hydrocarbons Specific gravity of product assumed to be 0 8 I I 920-002 2EY1gr99' Apnl 6,1999