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The initial level of protection and the Action Levels at which the PPE will be upgraded are determined <br />based on the identification of specific chemicals expected to be present at a Site and the established OSHA <br />Permissible Exposure Levels (PEL) or ACGIH Threshold Limit Values (TLVs), whichever is lower. In <br />the event more than one chemical is expected or exists at a Site, the most hazardous chemical will dictate <br />the level of personal protection required. Table 4-2 shows the action levels for levels of personal <br />protection equipment. <br />Table 4-2 <br />Action Levels for Personal Protection E ui ment <br />Monitoring <br />Equipment Hazard <br />Action Level <br />Above <br />Background <br />Action <br />PID/FID Organic <br />gas/vapor <br /><10 ppm Level D. <br />10 to 50 ppm Level C. Move upwind and continue air monitoring, <br />cease operations, or use detector tube(s) for <br />(contaminant) and reference Table 4-3 below. <br />> 50 ppm Immediate Withdrawal. Contact the PM and RSC for <br />further instructions to proceed. <br />As appropriate, PID readings will be utilized during the field activity and location anticipated having the <br />highest level of contamination. This location will be selected by the Site Supervisor. If these <br />measurements indicate exposure levels appropriate for Level D work, the use of detector tubes will be <br />limited to situations where field conditions or activities have changed. <br />HASP Level III <br />Rev. 01 — June 11,2007 4-2