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06 April 2012 <br /> AGE-NC Project No. 95-0184 <br /> Page 2 ofd <br /> 55,I,,�9 <br /> and MW-8). The concentrations of dissolved constituents collected in northern ST area y , <br /> IvV 2A <br /> intermediate well samples are lower than the shallow vapor well samples(MW-1/ vs.VW). _ ss' to <br /> The maximum concentrations of analytes in samples collected in the northern UST release y W-4(2.s— <br /> Sr <br /> area appear to reside in the upper 50 feet of the subsurface as demonstrated by groun�Y�sg <br /> water samples. ss'*LS-,, <br /> 03 sa <br /> 2.0. RECOUNT OF SCOPE OF WORK <br /> Multiple feasibility studies have been preformed to evaluate remedial action options forthe <br /> site. The following is a list of work plans prepared for remediation feasibility testing: <br /> • Work Plan Addendum dated 15 December 1995, a soil vapor extraction (SVE) pilot <br /> test was proposed. <br /> • Feasibility Pilot Tests Work Plan dated 16 December 1999, an in-situ air sparging <br /> (IAS) pilot test and a ground water extraction pilot test were proposed to be <br /> performed at the site. <br /> • Well Installation and Feasibility Study Work Plan - November 2004 dated 19 <br /> November 2004, installation of a ground water extraction well and a ground water <br /> extraction pilot test were proposed. <br /> • Work Plan Addendum dated 18 February 2005, a ground water extraction pilot test <br /> was proposed. <br /> • Work Plan Addendum dated 29 September 2005, a second ground waterextraction <br /> well was proposed. _ <br /> • Soil Vapor Extraction Pilot Test dated 10 November 2005, SVEilot test was i <br /> proToTed. -Co I 0w6 S0', l J!apu'r it xtrc�i 0-, Pi 1 0' TeSfi lZef0sr+ <br /> G W 6 <br /> Xi ve l c^+� �;/ot ztv�j <br /> 04pwt — 3/9/017 \ <br /> • Quarterly Report - Fourth Quarter 2009 In-Situ Air Sparging Feasibility Pilot Test <br /> Report dated 04 February 2010, a SVE pilot tesfwas performed. "� <br /> Advanced GeoEnvironmental,Inc. <br />