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' Former Nelson Ready Mia Page I <br /> Groundwater Monitoring Well Construction <br /> GPE Project No 518 2 <br /> March 30,2006 <br />' 60 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 minor diesel contamination is <br /> restricted to a small area in the immediate vicinity of the former tank pit None <br /> of the groundwater monitoring wells produced samples with detectable diesel or <br /> gasoline petroleum hydrocarbons, or gasoline oxygenates <br /> Groundwater monitoring data suggests that the direction of groundwater flow is <br />' toward the south <br /> Soil testing indicated that about half of the soil stockpile from the pit excavation <br /> t has been adequately bio-remeditated The clean soil was disposed of by <br /> spreading on site The remainder of the soil continues to be stockpiled pending <br /> additional bio-degradation of diesel hydrocarbons <br /> 62 Recommendations <br /> Based on the data collected during the course of this investigation, Geo-Phase <br /> Environmental Inc makes the following recommendations <br /> 0 <br /> At least one additional quarterly groundwater monitoring and sampling <br /> should be completed prior to assessing whether site closure is appropriate <br /> We anticipate that a Site Conceptual Model will also need to be completed <br />' prior to submitting the closure report <br /> 1 <br /> 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax (209) 569-0293 <br /> I <br /> i <br />