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!� In September 2003, Shaw observed the advancement of four cone penetration test <br /> (CPT) borings. Discrete groundwater samples collected from HydroPuncho borings <br /> made adjacent to the CPT borings indicated the presence of methyl tert-butyl ether <br /> (MTBE) in groundwater northeast of the site, and that the vertical extent of MTBE <br /> appeared to be limited to within approximately 30 feet of the ground surface. <br /> y <br /> • Shaw prepared and submitted the Corrective Action Plan for Parkinson's Hammer I-5 <br /> Arco (CAP) on October 26, 2004. <br /> • The CAP was tentatively approved by the EHD on,May 27, 2005, contingent upon the <br /> installation of the well proposed here, under implicit assumption that findings from the <br /> P g <br /> well do not alter the site conceptual model. <br /> E{ <br /> ' 6 <br /> i <br /> SacDP-N_isacDR20051P0188018800401A5acWPP&kinson.doc 1-2 <br /> 9.6.05 <br /> �f <br />