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27 March 2000 AGE-NC Pro icct No. 98-0450 Page 15 of, 19 The proposed location of the SVE unit is near the norihvvest corner at the site: (Figure 8). "]-his location for the SVE. runt will allow neighboring properties to conduct their day to day business without interference from the operation of the VES unit. The VES unit Will be secured by a chain- linked, gated enclosure with dimension 15 feet wide by 20 feet long and six feet in height. 5.2.3. Soil Vapor Extraction Supplemental f�,neagy Electrical energy will be supplied to the heating coils of the SVF. system to maintain the optimal temperature for a maximum destruction rate of hydrocarbon vapor. An existing electrical meter for the site is located at the west corner of the maintenance building on-site. A dedicated electrical line will be installed by representative of AGE that will connect directly to the VES unit. 5.2.4. Soil Vapor Extraction Monitoring Activities The VES unit will be monitored weekly using a photo-ionization detector (111D) and Dx%,ver DS-200 flow sensor to ensure optimal destruction of recovered hydrocarbon vapor, and to monitor cleanup progress. The 111D readings will be recorded frons the influent end of the VES unit. and recorded before and after catalytic destruction. Operational parameters (air flow, combustion temperature, volume of processed vapor. oxygen level and the lower explosive limits) will be measured on it weekly basis to ensure optimal destruction of recovered hydrocarbon vapor. Vapor samples will be collected on a monthly basis From the influent end of the VES utiliTinc the vacuum pump on a Model 580A organic vapor meter("Flicrrrlo Environmental Instruments Inc.). The samples will he collected in Tedlar bags and transported under chain-of-custody to a DI IS-certified laboratory. During the"start-up"period for the SVE System, organic vapor and operational parameters (air flow. combustion temperature. volume of processed vapor. oxygen level and the lower explosive limits) will be monitored on a daily basis. The anticipated start-up period will be approximately one week. 5.31. IN-,SITU AIR SPARGING WELL/SYSTEM INSTALLATION The proposed IAS system will be comprised of an electric air compressor, a valved piping network and fourteen air sparing wells. The compressor will provide between 3 and 10 pounds per square inch (psi) of air to each air sparuc well. Approximate air sparging Well locations are depicted in 1'i,gure 6. 4 5.3.1. hi-sim Air Sparging Well Installation 4di-anced Geo:nirmimental,Inc.