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9. Class III — Immediately dangerous to life and health <br />Confined spaces where an atmosphere free of dangerous air contamination, oxygen <br />deficiency or oxygen enrichment cannot be verified or prevented. Entry will not be <br />permitted without proper authorization. <br />10. Approved respiratory protective equipment (SCBA) must be worn by occupants of <br />the space. <br />11. An Approved safety belt or harness with an attached line must be worn by all <br />occupants of the confined space. The line shall be secured outside the space and shall <br />be at least 2000 -pound test. <br />21 <br />