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IF <br /> 3 <br /> First Quarter 2005 Quarterly Groundwater Monitoring Report <br /> Stockton Center Site Authority—University Park <br /> March 2,2005 <br /> ;Page 3 of fi <br /> ' estimated groundwater gradient for the site on February 3, 2005, was 0.0094 ft/ft to the east and is shown <br /> in Figure 2, attached. <br /> Table 2 Groundwater Elevation Data (February 3,2005) <br /> h <br /> Well Number TOC Elevation _[Depth(feet) to Groundwater(feet) Groundwater Elevation (feet) <br /> { MW-1 17.42 41.74 -24.32 <br /> } MW-2 17.59 41.52 -23.93 <br /> MW-3 17.16 41.86 -24.70 <br /> TOC=Top of Casing <br /> TOC Elevation:Referenced to NAVD88 datum from NGS Benchmark HS3999. <br /> LABORATORY ANALYTICAL RESULTS <br /> # Groundwater samples were collected from monitor wells MW-1 and MW-3 on February 3, 2005, after <br /> purging: Monitor well MW-2 was purged on February 3, 2005 and sampled on February 4, 2005,-due to <br /> slow recovery after purging. All groundwater samples were analyzed for total petroleum hydrocarbons <br /> quantified as gasoline (TPH-G) by EPA Method 8015m, for benzene, toluene, ethyl benzene, and total <br /> f xylenes (BTEX) by EPA Method 8020, and for gasoline oxygenates/additives by,EPA Method8260B. <br /> . . The gasoline oxygenates/additives included methyl tertiary-butyl ether (MTBE), ethanol, tertiary-butanol <br /> (TBA), di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), <br /> 1,2-dibromoethane (EDB or 1,2-DBA), and 1,2-dichloroethane (1,2-DCA). Monitor wells MW-1 MW-2 <br /> and MW-3 were also analyzed for total petroleum hydrocarbons quantified as kerosene, diesel; and motor <br /> oil (TPH-K, -D, .and -MO) by EPA Method 8015m. The laboratory analytical results for the groundwater <br /> samples collected from the monitor wells on February 3 and 4, 2005, are presented in Table 3, on the next <br /> page, and in Figure 3, attached. Historical groundwater monitoring data and the laboratory report <br /> (certificates of analyses and chain-of-custody record) are also attached. <br /> a <br /> i <br /> E <br /> i <br /> E . <br /> r <br /> ILA CONDOR <br />