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Date May 15, 2003 <br /> Quarter 1St Quarter,2003 <br /> DISCUSSION: <br /> TPHg, benzene, toluene, ethylbenzene, total xylenes (BTEX), and MtBE, were reported in samples collected from <br /> site wells during this quarterly groundwater monitoring event Additonally, several volatile organic compounds <br /> including cis 1,2-dichloroethene, n-butyl benzene, sec-butyl benzene, tert-butyl benzene, di-bromo methane, <br /> isopropyl benzene, trichloroethene, and vinyl chloride were reported in samples collected from site wells Analyte <br /> concentrations were generally consistent with previous quarterly monitoring events Groundwater elevations in the <br /> site wells generally Increased relative to the previous quarter The inferred groundwater flow direction and gradient <br /> were consistent with previous quarters <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 Elevation and Analytical Data <br /> Table 2 Fuel Oxygenates Analytical Data <br /> Table 3 Volatile Organic Compounds Analytical Data <br /> Table 4 Groundwater Gradient Data <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 1Wp, n\J5 RP ARCO}044931Quanu"QTR 0314493 GWMR IQ03 doc Page 2 <br />