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19 December 2003 AGE-NC Project No. 95-0128 Page 9 of 12 SVE piping system installation,SVE system start-up period,sampling,monitoring,maintenance and progress/confirmation sampling are outlined below: 4.1. DRILLING ACTIVITIES The following procedures will be performed prior to any digging/drilling activities: • Prepare a Site Health and Safety Plan in accordance with the Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities - Prepared by National Institute for Occupational Safety and Health,Occupational Safety and Health Administration,U.S.Coast Guard and U.S. Environmental Protection Agency, October 1985. • Notify the FHS-EHD a minimum of 48 hours prior to commencement of any work, while securing proper city/county soil boring or well permits. • All drilling locations will be marked at least 48 hours in advance for an Underground Service Alert (USA) check of underground utilities or pipes. 4.2. SOIL VAPOR EXTRACTION SYSTEM DESIGN Initiation of an SVE system is proposed within the petroleum hydrocarbon-impacted area. The SVE system will consist of the existing SVE well (VW-1), three newly installed SVE wells. SVE well locations are depicted in Figure 3. A catalatic destruction process is proposed for hydrocarbon vapor recovery by utilizing an electric heated catalatic oxidizer soil vapor extraction (SVE) system; a typical diagram of the system is illustrated in Figure 4.The catalatic oxidizer is outfitted with a heat exchanger to provide an effective destruction ratio at reduced concentrations of hydrocarbon vapor.Soil vapors will be extracted from the proposed configuration of extraction wells using a vacuum blower and routed to the catalatic oxidizer. Supplemental energy(i.e. electricity)will be utilized to maintain the optimal temperature for a maximum destruction rate of hydrocarbon vapors. The SVE will be connected through a manifold box to the vapor recovery wells and should be able to operate between 175 and 200 cubic feet per minute (cfm). The SVE unit is operatedby electricity,which is readily availableto the site.An automatic air dilution module adjusts for the optimal combustion parameters by adding oxygen. The proposed location of the SVE unit is near the northeast corner at the site (Figure 3). This Advanced GeoEnviron mental,Inc.