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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, CA <br /> Wic#204-6522-0307 <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 IL u IL u IL u IL L u IL u Iu IL u IL MSL ft. I ft. MSL ft. rn <br /> Notes: <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 /> i <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-4B, MW-SA, MW-5B, MW-6A and MW-613 surveyed on January 8,2000 by Virgil Chavez Land Surveying of Vallejo,CA <br /> i <br /> Revised survey data for wells EW-1 and EW-2 provided by Cambria Environmental Technology, Inc. in January,2001. <br /> i <br /> P*10 . <br />