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• WELL CON&TRATIONS • <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, CA <br /> MTBE MTBE Depth to Depth GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water to SPH Elevation Thickness Reading <br /> u /L u IL u IL u /L u /L u IL u /L u /L MSL ft ft MSL ft m <br /> Notes <br /> a= D 0 readings not taken for this event at wells MW-2, MW-3 and EW-2 <br /> b= MTBE by EPA 8020 not taken for this event <br /> c=No port, unable to sample <br /> d=Top of Casing elevation altered during wellhead maintenance <br /> e= Hydrocarbon does not match pattern of laboratory's standard <br /> *MTBE by EPA Method 8260 omitted due to lab error <br /> *'Sample was analyzed past EPA recommended holding time <br /> ***MTBE by 8260 for well MW-1 inadvertently not run for July 9, 1999 event <br /> Survey of wells performed on March 25, 1999, by Virgil Chavez Land Surveying of Vallejo, CA <br /> Wells MW-4A, MW-413, MW-5A, MW-513, MW-6A and MW-6B surveyed on January 8,2000 by Virgil Chavez land Surveying of Vallejo, CA <br /> Revised survey data for wells EW-1 and EW-2 provided by Cambria Environmental Technology, Inc in January,2001 <br /> Site surveyed May 7,2002, by Virgil Chavez Land Surveying of Vallejo, California <br /> Paqe 13 <br />