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Extended Plume Definition:4500 W 11th St., Tracy,CA. page 8 <br /> 3.4 Extended Quarterly Groundwater-quality Monitoring Program <br /> " On April 11, 2002, the scope of the groundwater-quality monitoring program at the Navarra <br /> Site was expanded to include quarterly recovery of samples from each of the 15 monitoring <br /> wells extant on the site at that time (The San Joaquin Company 2002c). The records of <br /> groundwater elevations in, and the concentrations of analytes of concern in samples of <br /> groundwater recovered from them, are also included in Tables 3 and 4. <br /> Note: <br /> According to the quarterly schedule for groundwater-quality monitoring using wells <br /> MW-1 - MW-7 that was initiated in May 2000 following completion of the first <br /> phase of site characterization at the Navarra Site, a round of monitoring would have <br /> been due in late March 2002.However,to avoid unnecessary expenditure of USTCF <br /> +� grant funds, SJC's engineer delayed implementation of that quarterly round for two <br /> weeks, until April 11, 2002, so that the complete array of 15 monitoring wells that <br /> had been completed by that time could be included in the sampling program. <br /> 3.5 Annual, Semi-annual and Quarterly Groundwater-quality Monitoring Program <br /> �-- Quarterly groundwater-quality monitoring with recovery of samples from all 15 wells then <br /> present at the Navarra site continued until July 2003 when, in compliance with guidance <br /> } provided by the SJCEHD (San Joaquin County Environmental Health Division 2003), a <br /> i-- schedule for annual, semi-annual and quarterly groundwater-quality monitoring for different <br /> well sets went into effect. <br /> Detailed results of the site characterization and groundwater-quality monitoring programs <br /> that have been completed to date have been presented in a series of engineering reports <br /> prepared by SJC (The San Joaquin Company 2004, 2003b, 2003c, 2003d, 2003e, 2002a <br /> 2002b, 2002c, 2002d, 20014, 2001 e, 2001f, 2001g,). The April 2004 sampling round is <br /> detailed in Section 4.10 below. <br /> After installation of seven additional groundwater-quality wells in April 2004 as part of the <br /> additional site characterization work that is documented in this report, the currently adopted <br /> program of groundwater-quality monitoring is again based on a quarterly schedule with <br /> groundwater samples being recovered from each of the 22 extant groundwater-quality <br /> monitoring wells on the site. <br /> Nosoorr <br /> SJC <br />