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1 Former Valley Water Treatment Page 5 <br /> Quarterly Groundwater Monitoring Report <br />' Project No. 480.2 <br /> May 16, 2006 <br /> 0 <br /> 3.0 DISCUSSION <br /> 3,1 Conclusions <br /> Field .and analytical data results are summarized in Summary Table 1 and <br /> illustrated in Figures 2 and 3. <br /> Based on the field data obtained in this monitoring event, the groundwater <br /> surface lies almost 3 feet shallower than it did during the December event. <br /> The direction of groundwater flow has shifted from nearly due north, to the <br />' north by northwest. <br /> Contaminant concentrations in MW-1 remain at low levels. The TPH <br /> concentration was 330 ppb, and BTEX compounds are at trace concentrations. <br /> 3.2 Recommendations <br /> Quarterly groundwater monitoring Q Y �' ng should continue. <br /> 10 <br /> 1 <br /> 1 <br /> I <br /> I <br /> 1 <br /> 2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax (209) 569-0293 <br />