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. wells MW-9 (19 �Lg/l) and MW-10 (0.67 pg/1). DIPS (4.5 pg/1) was detected in the sample collected from <br /> well MW-9. TBA (5.6 lig/l) was detected in sample collected from wells MW-10. Toluene, ethylbenzene, <br /> xylenes, ETRE, and EDB were not detected in any of the samples. These analytical data are generally <br /> consistent with previous sampling events. <br /> Groundwater elevations have increased approximately 0.03 to 0.22 feet since the previous sampling event <br /> (February 2002) with the exception of MW-8, which decreased by 0.09 feet. The groundwater flow <br /> direction on April 23, 2002, was calculated to be towards the northeast at a gradient of approximately <br /> 0.0017 ft/ft. Groundwater flow directions have predominantly been toward the northeast and east during <br /> previous monitoring events. <br /> ATTACHMENTS: <br /> o Table 1 Groundwater Monitoring Data <br /> o Table 2 Groundwater Analytical Results for Oxygenates and Additional Compounds <br /> o Figure 1 Site Location Map <br /> o Figure 2 Groundwater Elevation Contours (Second Quarter 2002) <br /> o Figure 3 Groundwater Analytical Summary (Second Quarter 2002) <br /> o Appendix A Field Data Sheets <br /> d Appendix B Sampling and Analysis Procedures <br /> o Appendix C Certified Analytical Reports and Chain-of-Custody Records <br /> PA13p-Arco for URS\54691Quarterly\Arcc_5469_2QO2.doc Stratus <br />