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Valley Water Treatment Page 9 <br /> Groundwater Monitoring Wel] Construction <br /> Project No. 480 <br /> March 14, 200E <br />' 6.0 Conclusions and Recommendations <br />' 6.1 Conclusions <br /> The laboratory analytical results from the soil and groundwater samples <br /> collected during this investigation suggest that gasoline contamination is <br /> restricted to a small area in the immediate vicinity of MW-1 and the point of <br /> release. Testing for 5 gasoline oxygenates did not suggest MTBE or other <br /> oxygenating additives are present in the sub-surface. <br /> Groundwater monitoring data suggests that the direction of groundwater flow is <br /> toward almost due north, and away from the Stockton Deep Water Ship <br /> Channel. <br />' 6.2 Recommendations <br /> Based on the data collected during the course of this investigation, Geo-Phase <br /> IEnvironmental Inc. makes the following recommendations: <br /> • At least one additional quarterly groundwater monitoring and sampling <br /> lie should be completed prior to assessing what remedial steps may be <br /> appropriate. <br /> i <br /> i <br /> I <br /> I <br /> I2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax (209) 569-0293 <br /> I <br />