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1 <br /> GEOMATRIX <br /> 3.0 MONITORING RESULTS <br /> Groundwater elevation data and samples were collected from six site wells during first quarter <br /> 2003 Field water quality parameters are included on the well sampling and development <br />' records (Appendix A) Groundwater elevation data, groundwater flow direction and gradient, <br /> and analytical data are presented in Tables 1, 2, and 3, respectively Laboratory analytical <br />' reports and chain-of-custody records are included in Appendix B <br />' 3.1 GROUNDWATER ELEVATION,FLOW DIRECTION,AND GRADIENTS <br /> Depth to groundwater was collected before purging groundwater on February 20, 2003 Floating <br /> product was not observed in any of the site wells Historical and current groundwater elevation <br />' data are presented in Table 1 Review of groundwater elevation data suggested that the <br /> groundwater measurement on February 20, 2003, in MW3-1 was anomalous Depth-to- <br /> groundwater data was collected again in all of the site wells on March 24, 2003 Both sets of <br /> data are included in Table 1 and were used to prepare two site groundwater contour maps <br />' (Figures 3 and 4) The groundwater elevations measured on March 24 confirmed that the <br /> February 20 data in MW3-1 were anomalous, therefore, the February 20 measurement for <br /> MW3-1 was not used to construct potentiometnc contours on Figure 3 Groundwater levels have <br /> risen about 2 to 3 feet in monitoring wells MW3-1, MW3-2, and MW3-3 since fourth quarter <br /> 2002 This is the first set of groundwater level data for monitoring wells MW3-4, MW3-5, and <br /> MW3-b <br />' Based on the groundwater elevation data, the calculated groundwater flow direction for February <br /> and March is south to southwest at a gradient of 0 005 and 0 004,respectively (Table 2 and <br />' Figures 3 and 4) <br /> 3.2 LABORATORY RESULTS <br />' The following summarizes the quality assurance/quality control of the laboratory analysis and <br /> presents results of the chemical analysis A copy of the analytical report for the groundwater <br />' samples collected for the first quarter 2003 groundwater monitoring event are included in <br /> Appendix B <br />' 3.2.1 Quality Assurance/Quality Control Evaluation <br />' APPL reported that six groundwater samples and one travel blank were received on February 21, <br /> 2003, in good condition Holding times for the requested analysis were met Results of the <br /> travel blank analysis include detections of ethylbenzene, toluene, and xylenes APPL reported <br /> I 1PROJEM6000s16437 00016437.06 doo 3 <br />