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n� <br /> o Date* April 29,2003 <br /> Quarter: 15' Quarter,2003 <br /> • The reported results for MtBE in sample VW-113 may be biased low due to a low average percent recovery <br /> reported in the associated MS/MSD analysis <br /> DISCUSSION: <br /> Total petroleum hydrocarbons as gasoline TPHg, MtBE, and 1,2-dichloroethane (1,2-DCA) were reported in <br /> samples collected from monitoring wells this quarter Constituent concentrations were generally consistent with <br /> historic data All other analytes were reported as below laboratory detection limits Groundwater elevations in wells <br /> across the site generally increased relative to the previous quarter The inferred groundwater flow direction was to <br /> the northeast at an average gradient of 0 02 feet/foot <br /> This report is based on data, site conditions, and other information that are generally applicable as of the date of the <br /> report,and the conclusions and recommendations herein are therefore applicable only to that time frame <br /> TABLES <br /> Table 1 Groundwater Monitoring Data <br /> Table 2 Analytical Results for Oxygenates <br /> FIGURES <br /> Figure 1 Groundwater Elevation Contours <br /> Figure 2 Groundwater Analytical Summary <br /> • APPENDICES <br /> Appendix A Field and Laboratory Procedures <br /> Appendix B Laboratory Analytical Reports,Chain-of-Custody Documentation,and Field Data Sheets <br /> • <br /> K V5$P ARCOD21861Quanur1y11 QT'R 03121 Sb GWNR 1Q03 doc Page 2 <br />