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2 .3 . 2 Levels of Protection <br /> The level of personnel protective equipment required shall <br /> be determined by the type and levels of waste or spill <br /> material present at the site where project personnel may <br /> be exposed. In situations' where the types of waste or <br /> spill material bn-site are unknown or the hazards are not <br /> clearly established or the situation changes during onsite <br /> activities , the site safety Officer must make a <br /> reasonable determination of, the level of protection that <br /> will assure the safety ofdrilling personnel until the <br /> potential hazards have been , determined precisely through <br /> monitoring, sampling, informational assessment, or other <br /> reliable methods. once the hazards have been determined, <br /> protective levels commensurate with the hazards shall be <br /> employed. Protection levels will be continuously <br /> evaluated to reflect any new information acquired. <br /> The levels ofrotection utilized Ync. •are <br /> P <br /> presented below: = a <br /> 10—A-Yel - Level A protection must- be selected when the <br /> Site Safety Officer makes a reasonable determination that <br /> the highest available level of both respiratory and skin <br /> and eye contact protection is needed. It should be noted <br /> that while Level A provider maximum available protection, <br /> it does not protect against all possible hazards. <br /> Consideration of the beat P-1tons that can arise from <br /> wearing Level A protection should also enter into the <br /> subtask leaders decision. ; (comfort is nat a decision <br /> tactor, but heat stress will influence work ' rate, <br /> scheduling, and, other work practises. ) <br /> ve_„1 - The Site safety Officer must select,'-Level B <br /> Protection when t1e highest level of respiratory <br /> protection is needed, but hazardous material -exposure to <br /> the few unprotected areas of the body (i.a. , the back of <br /> the neck) is unlikely. <br /> L,eve1 C - The Site Safety officer may select Level -C when <br /> the required level of respiratory protection is known, or <br /> reasonably assumed to be, not greater than the level of <br /> protection afforded by full face air purifying <br /> respiratorst and hazardous materials exposure to the few <br /> unprotected areas of the body (i.e. , , the back of theL neck), <br /> is unlikely. Level C requires carrying an emergency <br /> escape respirator. ( A half mask respirator fib' acceptable <br /> when airborne contaminate level are lower than TWA action <br /> levels. <br /> 6 <br />