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' GEOMALTRIX <br /> • constituents were detected in the laboratory method blanks Recoveries of surrogate spikes were <br />' within laboratory quality control hn-uts <br />' 3.2.2 Analytical Results <br /> Analytical results for quarterly monitoring parameters are presented in Table 3 Analytical <br /> results are consistent with historical results for samples from wells MW3-1, MW3-2, and <br /> MW3-3 This was the second sampling event for monitoring wells MW3-4, MW3-5, and <br /> MW3-6 Like the first quarter 2003 results, groundwater sampled from monitoring wells <br /> MW3-4 and MW3-5 have no detected TPHg or BTEX Groundwater samples from monitoring <br /> wells MW3-1, MW3-2, MW3-3, and MW3-6 contain detectable concentrations of TPHg and <br />' BTEX The highest concentration of TPHg was detected in the groundwater sample from <br /> MW3-2, and the highest concentration of benzene was detected in the groundwater sample from <br />' MW3-6 The highest concentrations of toluene, ethylbenzene, and xylenes were detected in the <br /> groundwater sample from MW3-2 The TPHg and benzene concentrations in MW3-6 decreased <br /> substantially compared to the initial sample taken during first quarter 2003 <br /> 4.0 REFERENCES <br /> Bartow and Nilsen, 1990, Review of the Great Valley Sequence, Eastern Diablo Range and <br /> Northern San Joaquin Valley, Central California, USGS Open File Report 90-226, <br />' (Bartow and Nilsen, 1990) <br /> Geomatrix Consultants, Inc , 2003, Results of Additional Assessment and Remediation <br />' Evaluation of Petroleum Hydrocarbons in Groundwater, Site No 3 (Site Code 1282-124), <br /> prepared for the Port of Stockton (Geomatnx, 2003a) <br /> Geomatnx Consultants, Inc , 2003, First Quarter 2003 Groundwater Monitoring Report, UST <br /> Site No 3 (Site Code 1282-124), prepared for the Port of Stockton (Geomatnx, 2003b) <br /> 1 <br /> r <br /> I TRO]ECI\6000s16437 00016437-11 dm 4 <br /> 1 <br />