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W. CONFINED SPACE CLASSIFICATIONS <br />A. Class I — Minimum Potential Hazard <br />Confined spaces where an atmosphere with a dangerous air contamination, oxygen <br />deficiency or oxygen enrichment is unlikely to develop. <br />1. Entry procedures are: <br />a. Class IA — Annual permit authorizing entry is required. This permit is to be used <br />as a checklist. <br />r <br />b. Class IA and Class IB — All areas of the space must be ventilated with clean air at <br />a rate of six (6) or more air changes per hour, or as specified under OSHA <br />regulation 5205.1040 A3a and B4. <br />18 <br />