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Site Background Information AGE-NC Project No. 08-1598 Page 2 of 4 Inc. (AGE) has no direct knowledge that investigations of the tank pit area have been performed. Additionally, AGE is not certain of the former UST locations. One 1,000-gallon UST (unleaded gasoline)was removed from the site in November 1992, without EHD permit. In May 1993, confirmation sampling was performed by Geological Audit in the tank pit; two samples were collected from the tank pit and one from the stockpile. Petroleum hydrocarbon compounds were not reported above laboratory reporting limits in any of the soil samples collected. The UST location appears to have been south of the former airplane parking strip. A closure letter from EHD for the 1 ,000-gallon UST removal was issued on 21 December 1993. PREVIOUS SITE ASSESSMENT In 1989, Weston, Inc advanced six soil borings (BA, BC, BE, BF, BG and BH) on site for collection of soil and ground water samples. Additionally, three borings were advanced as monitoring wells (MW-1 (BA), MW-2 and MW-3) to total depths ranging from 9.15 feet to 13.54 feet below surface grade (bsg). Soil and ground water samples were analyzed for organochlorine, organophosphorous and carbamate pesticides; additionally, ground water samples were analyzed for chlorinated phenoxy acid and triazine herbicides: • Only one soil sample reported detectable concentrations of one or more constituents of concern. The only compounds found above current regulatory criteria were the dichlorodiphenyltrichloroethane (DDT) family of chemicals (DDT, DDE and DDD), but at relatively low levels. • Bromacil, carbaryl and diuron were detected in ground water samples collected from well MW-3; concentrations did not exceeded the Primary or Secondary Drinking Water Standards. Field Procedures and sample results are outlined in the Weston, Inc.-prepared, Former Discharge Area Investigation Report, dated 29 August 1989. It is AGE's understanding that ground water monitoring wells MW-1 , MW-2 and MW-3 were destroyed during building demolishing activities at the site by Mr. Robert Rocha, of Madison Construction. In July 2007, an AGE representative conducted an interview with Mr. John Trinkle, former property owner, to determine the details of the monitoring well destruction. During the interview, Mr. Trinkle noted that the formerwells' presence was not known prior to the demolishing activities. While leveling the area with a backhoe the subcontractor unknowingly discovered and damaged the wells. The wells were thought to be abandoned pipes, until they were removed. Advanced Geo Environmental,Inc.