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*400 09 September 2009 AGE-NC Project No. 95-0184 Page 2 of 3 2.0. RECOUNT OF SCOPE OF WORK The following is a list of work plans prepared for remediation feasibility: • Work Plan Addendum dated 15 December 1995,a soil vapor extraction(SVE)pilot test was proposed. • Feasibility Pilot Tests Work Plan dated 16 December 1999, an in-situ air sparging (IAS) pilot test and a ground water extraction pilot test were proposed to be performed at the site. • Well Installation and Feasibility Study Work Plan - November 2004 dated 19 November 2004,installation of a ground water extraction wells and a ground water extraction pilot test were proposed. • Work Plan Addendum dated 18 February 2005, a ground water extraction pilot test was proposed. • Work Plan Addendum dated 29 September 2005,a second ground water extraction well was proposed. • Soil Vapor Extraction Pilot Test dated 10 November 2005, a SVE pilot test was proposed. 3.0. PROPOSED SCOPE OF WORK Previous feasibility pilot test work plans have been submitted for the site.The Feasibility Pilot Tests Work Plan included an air-sparge pilot test as a component of the plan;this pilot study has not been completed. The performance of field scale pilot studies for ground water extraction have been completed. 3.1. SOIL VAPOR EXTRACTION/IN-SITU AIR SPARGING TEST To determine the feasibility of remedial options at the site,AGE will perform an SVE/IAS pilot test. The SVE/IAS pilot test will be conducted for approximately 96-hours (4 days). The IAS pilot test will be conducted by injecting air into a deep, drowned, depth discrete remediation near, the soil vapor extraction wells exposed to the upper wate} jble.The most compatible well for this air-sparge application would be well VW-5C, screened feet to 55 feet bsg. This well is to be used as a sparging well, using a compressor-driven unit. Several parameters, including, sparging rate and volume,radius ofinfluence,soil vapor concentrations,soil vapor pressures,groundwater depths and dissolved oxygen,will be measured at surrounding wells. Advanced GeoEnvironmental,Inc.