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28 February 2012 AGE-NC Project No. 98-0497 Page 2of3 activities at the site in October and November 2006, dissolved concentrations in well MW-1 were significantly reduced. Petroleum hydrocarbons were not reported (non detect)above laboratory detection limits in any ground water monitoring well samples since February 2007. Analytical results of ground water samples are summarized in Table 3. As a result of the documented non detect wells at the site, AGE proposes to destroy wells MW-1 through MW-6 by pressure grouting techniques. All wells will be destroyed in accordance with the EHD Standards For Well Construction and Destruction. PROCEDURES As required, a health and safety plan will be prepared in accordance with Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities(National Institute for Occupational Safety and Health Administ ation, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to drilling activities, each proposed drilling location will be clearly marked and an utility clearance obtained through Underground Service Alert. Prior to destruction activities, wells will be check d for total depth and integrity using a Solinst water level meter. Any obstructions found in the well will be removed. Well boxes and caps will be re lived to expose the well casings of wells MW-1 through yl MW-6. The well heads will b fitted with a press re tight adapter connected to a hose extending from a grout mixe . A standard grout mixture will,be pumped into the well casing under approximately A pounds per square inch (psi)of pressure. The well will then be over-drilled to approximately 3 feet below surface grade (bsg) using 8.25-inch diameter°_ hollow stem augers. The top 2.5 feet of the well c sing will then be cut and removed and ab"�. , grout will be used to fill the boring to approximately 0.5 feet above the top of the well c 4`r casing. The remaining borehole will be backfilled to surface grade with neat cement and '�t. covered with concrete or asphalt or rock, dependi g on the surrounding surface material. -1-ham Soil cuttings generated during drilling activities and rinseate will be containerized in properly labeled Department of Transportation ( .O.T. -a PProved 55-gallon drums or a landfill disposal container, and stored on-site for di 3posal, in an area lacking public access. Upon completion of field work and disposal of soil-cuttings, a Well Destruction Reportort describing well destruction activities and proced res, including documentation of waste disposal from well destruction and other activities, will be prepared and submitted to the EHD. Advanced CeoEnvironmental,Inc.