UFC 3-460-03
21 JANUARY 2003
11.6.3. Entrant. The entrant is the individual trained, qualified, and authorized to enter the confined
space. Entrants must:
11.6.3.1. Fully understand all cleaning procedures, inspection requirements, safeguards, and
emergency egress and or rescue procedures associated with the entry.
11.6.3.2. Follow all safe work procedures required by the TES.
11.6.3.3. Notify the TES when hazards exist that have not been corrected.
11.6.3.4. Notify the TES if he or she is ill or on medication.
11.6.3.5. Immediately exit the tank when directed by any member of the tank cleaning crew or
when they recognize the warning signs of exposure to hazardous substances.
11.6.4. Attendant. The attendant stays outside the tank and monitors the entrants inside. The
attendant should maintain continuous communication with all authorized entrants, by voice, visual
observation, communications gear, or other equally effective means.
11.6.4.1. The attendant has the authority to order entrants out of the tank at the first sign of an
unexpected hazard.
11.6.4.2. The attendant must know the procedure and have the means to summon emergency
assistance if needed. They must stay at their post and not leave for any reason (except self-
preservation) unless replaced by an equally qualified individual.
11.6.4.3. The attendant continuously monitors the atmospheric levels while the entrants are inside
the tank.
11.6.5. Regulator Monitor. The regulator monitor is the individual that is responsible for ensuring an
uninterrupted supply of breathing air is provided to all workers in the tank. Self-contained breathing
apparatus (SCBA) systems must always be monitored while workers are inside the tank. If only
minimum manning is available, the attendant can double as the regulator monitor. This individual
must be able to see the gauges, hear the warning devices, and summon workers out of the tank if an
unacceptable condition arises. Also, the regulator monitor must:
11.6.5.1. Be fully trained on the operation of the air regulator, alarms, warning devices, and proper
setup of the air bottle or cascade system.
11.6.5.2. Ensure all equipment is in proper working order and has been thoroughly operationally
checked prior to workers entering the tank.
11.6.5.3. Notify the attendant or TES of any condition that could hinder the supply of air to
workers inside the tank.
11.6.5.4. Monitor air equipment and low-air warning devices until all workers exit the tank and
remove their masks.
11.6.6. Organizational Rescue Team. This team includes the TES, attendant, and at least one stand-
by rescue person for each individual inside the tank. . For aboveground storage tanks that are less
than 12 meters (40 feet) in diameter with two open manways, only one stand-by rescue person is
required for every two men in the tank. If two workers are inside the tank, then two rescue people
will be standing by equipped with the appropriate PPE. All rescue personnel must meet the training
requirements outlined in AFOSH Std 91-25, Paragraph 5.5, and the training requirements of the
entrant. Members of the organizational rescue team can be trained locally or in technical school in
the correct performance of their assigned duties. Also, members must be trained annually in CPR.
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