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because of emergency. The Entry Supervisor is capable of anticipating, recognizing, and evaluating employee exposure to dangerous atmospheres or other unsafe conditions and is proficient in the use of atmospheric testing instruments required of the particular entry. 8. Hazardous Atmosphere: Any of the following conditions that may occur in normal operations or emergencies. • Oxygen enrichment (greater than 23.5% 02). • Oxygen deficiency (less than 19.5% 02). • Concentrations of contaminants at or above the threshold limit value or permissible exposure level. • Concentrations of flammable gases and vapors at or above 10% of the lower explosive limit (LEL). • Airborne combustible dust at a concentration at or above its LEL. • Unknown concentration of air contaminant(s). 9. Hot Work Permit: Any work involving burning, welding, cutting, or similar fire or spark producing operations as well as work which produces a source of ignition, such as drilling, grinding, abrasive blasting, photo equipment, flashlights, and space heating requires authorization by Hot Work Permit. 10. Immediately Dangerous to Life and Health: Any condition that poses an immediate or delayed threat to life, or that would cause irreversible adverse health effects, or that would interfere with an individual's ability to escape unaided from a permit space. 1 I Other Confined Space: An area where existing ventilation in insufficient to remove dangerous air contamination, or where access or egress is difficult. Examples of this type of confined space are trenches and excavations. Training and permitting procedures vary from permit required confined spaces. 12. Project Safety Officer: PACIFIC employee who is responsible for the planning and completion of any job which may include permit-required confined space entry by a PACIFIC employee or contractor employee. ADMINIS/CONSP 4 June 2, 1994