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weiSS assocwreS I I( 7 <br /> 2 AIR MONITORING REQUIREMENTS <br /> As mentioned in Section 4.1.1, at the first sign of vapors, color detector tubes will be <br /> used to monitor air around the drilling area. The tubes will be used approximately every <br /> 15 minutes. If vapors arc detected, respirators equipped with cartridges suitable for <br /> organic vapors and particulates will be worn along with Level C protective clothing. If <br /> vapors are present above 700 ppm., workers will use Level B protection, in which full-face <br /> fresh-air breathing apparatus is used in lieu of a respirator. <br /> WPIF:\ALL\331DWG\331R1APB.DOC:74-331-00:V1.036 Page 6 <br />