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that rexpiire an upgrade in level of personal protective equipment(PPE). The action levels apply to all tasks performed <br /> Pg <br /> on this site. Guidelines for frequency of air monitoring are presented in Table 3-2. <br /> TABLE 3-1 <br /> AIR MONITORING ACTION LEVELS <br /> Instrument*1 Function Measurement Action/Protective Equipment Required <br /> Photoionization Detector ID or Flame Ionization Detector ID -Measures total organic vapors <br /> 0-99 Ppm Level D <br /> 100-499 ppm Upgrade to modified Level D -.Half-mask or fuU- <br /> mask respirator with acid gas/organic vapor <br /> cartridge re4Vired. <br /> i 500 ppm, Stop work. Contact PM and RHSO for guidance <br /> Ox en/Ex losimeter 02/LEL -Measures oxygen level 0 and lower explosive limit EL <br /> Oz 19.5 -22% • Acceptable conditions. Continue normal <br /> activity. <br /> 0 G 10.5% • Notify PM or RHSO <br /> 02 >22% • Leave area immediately; this atmosphere <br /> is extremely flammable. <br /> • Notify PM or RHSO <br /> LEL s 10% • Acceptable conditions. Continue normal <br /> Activit . <br /> .LEL >10% • Leave area immediately. <br /> • Contact PM or RHSO <br /> Instruments must be calibrated accordingto manufacturer's recommendations. <br /> q <br />