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CLEAxRW_ *xA" TER <br /> G R O U P, I N C <br /> • Envrranmenta! Services <br /> GROUNDWATER MONITORING AND SAMPLING RESULTS <br /> Depth to groundwater 9 38 to 9 89 feet below top of casing <br /> Flow direction Southeast at 0 01 feet/foot <br /> TPHg concentration range 120 gg/L (MW-2) to 36,000 gg/L (MW-1) <br /> Benzene concentration range 17 gg/L (MW-2) to 4,100 gg/L(MW-1) <br /> MTBE concentration range <5 0 gg/L (MW-2) to 280 gg/L (MW-1) <br /> Remarks no fuel oxygenates were detected at concentrations exceeding the practical quantitation <br /> limits by EPA Method 8240 (B) <br /> PROJECT STATUS <br /> Pre-approval to prepare a workplan for the installation of two monitoring wells and to perform a receptor <br /> survey has been received from the California UST Cleanup Fund This workplan will be submitted <br /> shortly As directed,groundwater monitoring will continue on a quarterly basis Based on the groundwater <br /> sample results presented, Clearwater recommends the analysis for the five fuel oxygenates be discontinued <br /> In future groundwater sampling events <br /> APPENDIX <br /> • Site Location Map (Figure 1) <br /> Q Site Plan (Figure 2) <br /> c Groundwater Contour Map-9/29/98(Figure 3) <br /> • Hydrocarbon Distribution Map-9/29/98(Figure 4) <br /> • Groundwater Elevations and Analytical Results (Table 1) <br /> • Clearwater Gauging Data/Purge Calculations and Well Purging Data <br /> • Certified Laboratory Reports, Chromatograms, and Chain-of-Custody Form <br /> • Clearwater Groundwater Monitoring and Sampling Protocols <br /> • <br /> CGI C-178 3Q98 2 November 6,1998 <br />