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i <br /> iOn January 30, 2004, Geocon purged well MW-3 in an attempt to create a cone of depression and draw <br /> • additional product into the well No increase in free product thickness was noted from the pumping <br /> i effort As of February 9, 2004 approximately one-half gallon of product had been removed from MW- <br /> 3 The product odor, color, and apparent viscosity are consistent with weathered gasoline <br /> Based on the presence of free product in well MW-3, SJCEHD requested a written summary of the <br /> findings and proposed actions Geocon prepared a letter regarding Free Product Discovery and <br /> Proposed Actions, dated February 18, 2004 Geocon proposed to continue monitoring and to remove <br /> free product(via hand balling) <br /> USTs were removed from the Site in 1991, and the Site has not operated as a fueling facility since that <br /> time In more than five years of groundwater monitoring and approximately 1 5 years of remedial <br /> activity at the Site (1998-2004), free product had not been encountered until the First Quarter 2004 <br /> The discovery of free product after a significant period of time of source removal and remedial activity <br />' could be indicative of an additional UST at the Site Accordingly, Geocon proposed to perform a <br /> records review at SJCEHD and perform a geophysical investigation at the Site to evaluate the existence <br /> of additional UST(s) In a letter dated February 26, 2004, SJCEHD concurred with Geocon's <br /> recommendations <br /> • In accordance with Geocon's Free Product Discovery and Proposed Actions workplan, a geophysical <br /> investigation was performed at the site by Spectrum Geophysics on May 3, 2004 Spectrum did not <br /> discover strong evidence of buried USTs at the site <br /> 1 <br /> i <br /> E <br /> Project No 58643-06-01 -5- September 28 2005 <br />