Sets what the written program of each entry employer must contain and how it is carried out. The entry employer prevents unauthorized entry and identifies and evaluates permit space hazards before anyone enters. It develops and implements safe entry practices: specifying acceptable entry conditions; letting each entrant or representative observe testing and monitoring; isolating the space and its physical hazards; purging, inerting, flushing or ventilating to eliminate or control atmospheric hazards (where the atmosphere cannot be brought below 10 percent LFL, entry is allowed only if the whole space is inerted to non-combustible, PPE covers remaining atmospheric hazards like oxygen deficiency, and all physical hazards are eliminated or isolated); confirming that monitoring would detect rising hazard levels in time for safe exit if ventilation fails; barriers against pedestrian, vehicle or other external hazards; verifying acceptable conditions throughout entry and keeping people out of hazardous atmospheres unless PPE is shown to be effective and is provided; and eliminating conditions such as high pressure that make cover removal unsafe. Equipment is provided at no cost, maintained and properly used: testing and monitoring instruments, ventilation, communications for entrants and attendants (including electronic means for attendants covering several spaces), PPE where engineering and work-practice controls fall short (with 1926.103 applying to respirators), lighting meeting 1926.56 and approved for the specific ignitable or combustible material, barriers and shields, ladders and similar access equipment, rescue and emergency equipment not supplied by rescue services, and anything else needed for safe entry, exit and rescue. Evaluation during entry: test before altering natural ventilation and before authorizing entry; where the employer shows isolation cannot be done because the space is large or forms part of a continuous system like a sewer, test pre-entry as far as feasible, monitor continuously where entrants work, and provide an early-warning system for non-isolated engulfment hazards. Monitor atmospheric hazards continuously unless continuous equipment cannot be bought commercially or periodic checks are frequent enough; test oxygen first, then combustibles, then toxics; let entrants observe; re-evaluate on an entrant's request; and give results to entrants immediately. At least one attendant stays outside for the whole entry; one attendant may cover several spaces, stationed anywhere outside the space, if the 1926.1209 duties can be effectively performed for each, and the program then sets emergency response means for multiple spaces. The employer designates and trains everyone with an active role; develops procedures for summoning rescue (including after a failed non-entry rescue), rescuing entrants, providing emergency services and stopping unauthorized rescuers; runs a permit system covering preparation, issue, use, cancellation and safe termination; coordinates with the controlling contractor when other employers work in or near the space; sets procedures for concluding entry; reviews and corrects the program before further entries when it may not protect employees (for example unauthorized entry, an uncovered hazard, injury or near-miss, or employee complaints); and reviews the program within 1 year after each entry using retained canceled permits (one annual review may cover all entries in 12 months; none is needed if no entry occurred).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.