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' Fourth Quarter/Annual <br /> 2008 Groundwater <br /> ' ARCADIS Monitoring Report <br /> Chevron Bulk Fuel Terminal <br /> 100-1621 <br /> ' 22888 Kasson Road <br /> Banta,California <br /> • TPH-DRO by USEPA Method 8015 and TPH-GRO by USEPA Method 8015 <br /> ' modified <br /> • MTBE,TAME and TBA by USEPA Method 8260B <br /> ' Analyses of samples collected from well MW-51A included the following parameters: <br /> ' TPH-DRO by USEPA Method 8015 and TPH-GRO by USEPA Method 8015 <br /> modified <br /> tMTBE by USEPA Method 8260B <br /> Analyses of samples collected from MW-70UA through MW-75UA, MW-70A through <br /> ' MW-75A and MW-70B through MW-75B included the following parameters: <br /> • TPH-DRO by USEPA Method 8015 and TPH-GRO by USEPA Method 8015 <br /> ' modified <br /> • BTEX by USEPA Method 8260B <br /> • MTBE,TAME and TBA by USEPA Method 8260B <br /> ' • Dissolved lead by USEPA Method 6010B <br /> Results <br /> ' Groundwater Flow <br /> ' Depth to water measurements were subtracted from surveyed top of casing elevations <br /> to calculate the groundwater elevation at each monitoring well. Depth to water <br /> measurements and calculated groundwater elevations are presented in Table 1. <br /> ' Calculated groundwater elevation data was used to construct groundwater elevation <br /> contour maps for the Upper A, A and B water bearing zones.Survey data of the newly <br /> installed wells was not available at the time of this report; therefore, groundwater <br /> ' elevafions of the newly installed monitoring wells are not mapped or discussed in this <br /> report. <br /> ' Upper A zone elevations ranged from 15.42(EW-1)to 16.15(MW-61 UA)feet above <br /> mean sea level(AMSL).The groundwater flow direction was calculated towards the <br /> ' 6of17 <br />