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31 January 2013 <br />AGE-NC Project No. 02-0926 <br />Page 19 of 21 <br />all utility infrastructure has been installed at the site. <br />As part of field activities an update to the health and safety plan presently on-file will be <br />prepared in accordance with Occupational Safety and Health Guidance Manual for <br />Hazardous Waste Site Activities (National Institute for Occupational Safety and Health <br />Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior <br />to mobilization, all underground boring areas will be clearly marked and a utility clearance <br />will be obtained through Underground Service Alert. <br />10.2. INSTALLATION OF REMEDIAL WELLS <br />AGE proposes installation of one SVE and two additional shallow zone air-sparging wells. <br />Remedial wells are proposed in the following locations: <br />One four 4-inch diameter SVE well screened between 10 feet and 35 feet bsg is <br />proposed south of MW-6 to enhance sparged vapor recovery; <br />One two-inch diameter air sparging well screened 50 feet to 55 feet is proposed <br />slightly west of proposed vapor recovery well MW-5 to expedite remediation of <br />dissolved impact near the currently installed well location and in an area of known <br />highly concentrated dissolved and adsorbed impact; and <br />One two-inch diameter air sparging well screened 50 to 55 feet is proposed slightly <br />southwest of proposed vapor recovery well VW-1 to expedite remediation of <br />dissolved impact near the currently installed well location and in an area of known <br />highly concentrated dissolved and adsorbed impact. <br />All proposed and existing remediation wells are shown in Figure 13. Diagrams detailing the <br />well construction details are included as Figures 14 and 15. All proposed wells will likely <br />be installed utilizing a limited access drilling rig equipped with 8-and 10-diameter augers. <br />10.3. INSTALLATION OF ADDITIONAL REMEDIAL SYSTEM PIPING <br />Additional remediation system piping will be installed above ground from proposed <br />remedial wells to the SVE and air-sparging system. One-inch diameter schedule 80 PVC <br />piping will be routed from the on-site air compressor to the proposed air-sparging wells. <br />Additionally, two-inch diameter PVC piping would be used to tie-in the proposed vapor <br />extraction well to the currently installed SVE piping network. All above ground piping will <br />be secured by the on-site fencing enclosure. <br />Advanced GeoEn‘ ironmental, Inc.