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WELL CONCENTRATIONS <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 TOCWatersi to SPH Elevation Thickness Reading <br /> u u IL u IL u !L u IL u IL u IL u IL (MSL) <br /> MSL ft (ft.) (MSL ft. m <br /> Notes: <br /> I <br /> a=D.O. 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 /> 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 A 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-5B, MW-6A and MW-613 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 /> P*12 <br />