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Report: Groundwater-quality Monitoring—March 29-31,2006, 7500.West Eleventh Street, Tracy, CA Page 28 <br /> As discussed in Section 5.5, to measure concentrations Of analytes of concern In <br /> groundwater when they are at, or close to, their annual maximum, the annual <br /> groundwater-monitoring rounds should be conducted in July of each year. <br /> Based on the foregoing, the next round of groundwater-quality monitoring at the 7500 <br /> West Eleventh Street Site should be conducted in July 2007, with samples being <br /> recovered from the following 19 wells: <br /> Wells along the Long Axis of the Principal Plume ; <br /> MW-3, MW-13, MW-7, MWFP-3, MW-14, MW-16, MW-18, MW-11 and <br /> MW-19 <br /> Wells around the Periphery of the Principal Plume <br /> MW-2 MW-5, MW-17, MW-4 and MW-10 <br /> Additional Wells in the Interior of the Principal Plume <br /> MWFP-1,MWFP-2, MWFP-4, MWFP-5 <br /> Well in the Secondary <br /> Plume <br /> MW-12 <br /> Each of the groundwater samples recovered will be analyzed for the following <br /> suite of analytes. <br /> Analyte Method of Analysis <br /> Total Petroleum Hydrocarbons EPA Method 8015M <br /> (quantified as Diesel) with pre-treatment by <br /> EPA Method 3630. <br /> Total Petroleum Hydrocarbons EPA Method 8260B <br /> (quantified as Gasoline) <br /> Benzene EPA Method 8260B <br /> Toluene EPA Method 8260B <br /> Ethyl benzene EPA Method 8260E <br /> Total Xylene Isomers EPA Method 8260B <br /> Tertiary-butyl alcohol EPA Method 8260B <br /> -1 Methyl-tertiary butyl ether EPA Method 8260B <br /> sic <br />