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GEOMATRIX <br /> 3.2LABO RATORY RESULTS <br />' The following provides an evaluation of the quality assurance/quality control results for the <br /> laboratory analyses and presents analytical results Copies of analytical reports for the <br />' groundwater samples collected for the third quarter 2003 groundwater monitoring event are <br /> included in Appendix B <br />' 3.2.1 Quality Assurance/Quality Control Evaluation <br /> Groundwater samples for MW3-1, MW3-2, MW3-3, MW3-4, MW3-5, and MW3-6 were <br />' received by the laboratory on August 25, 2003 Holding times for the requested analyses were <br /> met No analyzed constituents were detected in the laboratory method blanks or in the trip blank <br />' Recoveries of surrogate spikes were within laboratory quality control limits <br /> 3.2.2 Analytical Results <br />' Analytical results for quarterly monitoring parameters are presented in Table 3 During third <br /> quarter 2003, groundwater samples from each well had detectable concentrations of TPHg or <br />' BTEX Analytical results for TPHg and BTEX in groundwater samples from wells MW3-1, <br /> MW3-2, and MW3-3 are higher than most of the historical results, but are consistent with the <br /> highest historical detections <br /> This was the third sampling event for monitoring wells MW3-4, MW3-5, and MW3-6 During <br />' first and second quarters 2003 (Geomatnx, 2003b), groundwater sampled from monitoring wells <br /> MW3-4 and MW3-5 contained no detected TPHg or BTEX The third quarter 2003 results <br /> Iindicate relatively low concentrations of TPHg, toluene, ethylbenzene, and xylenes present in the <br /> groundwater sample from MW3-4 and even lower concentrations of toluene, ethylbenzene, and <br /> xylenes in the groundwater sample from MW3-5 (Table 3) <br /> During third quarter 2003, the highest concentration of TPHg, toluene, ethylbenzene, and <br /> Ixylenes were detected in the groundwater sample from MW3-2, and the highest concentration of <br /> benzene was detected in the groundwater sample from MW3-6 <br /> 10I <br /> I <br /> I 1PROJECTTY000s16437 00016437-13 doe 3 <br /> 1 <br />