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i <br /> Current Phase of Project Monitoring/Assessment <br /> Frequency of Groundwater Sampling Wells MWA through MW-6 - Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Sampling Date March 31, 1999 <br /> Is Free Product (FP) Present on Site No <br /> FP Recovered this Quarter NA <br /> Cumulative FP Recovered to Date NA <br /> Approximate Depth to Groundwater 24 37 to 26 69 <br /> Direction of Groundwater Flow East-southeast <br /> Groundwater Gradient 0 002 ft/ft <br /> DISCUSSION <br /> Results of this monitoring event indicate that the levels of dissolved hydrocarbons are generally consistent <br /> with levels detected in previous sampling events, with the exception of wells MW-3 and MW-6 MTBE was <br /> detected in wells MW-3 and MW-6 at concentrations of 17 0 micrograms per Liter (l1g/L) and 12 2 Rg/L, <br /> respectively The groundwater flow direction (east-southeast) and gradient were generally consistent with <br /> previous sampling events Groundwater elevation increased 1 47 feet in the wells from the previous <br /> . sampling event (December 1998) <br /> ATTACHMENTS <br /> • Table 1 Groundwater Monitoring Data <br /> • Figure 1 Groundwater Analytical Summary (First Quarter 1999) <br /> • Figure 2 Groundwater Contour Map (First Quarter 1999) <br /> • Appendix A Sampling and Analysis Procedures <br /> • Appendix B Laboratory Analysis Reports and Chain-of-Custody Records <br /> • Appendix C Field Data Sheets <br /> CP1E 1ARC0105481QTRLY10548Q199 DOC-9811sg 1 <br />