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Health and Safety Plan 1319 & 1327 South Madison Street, Stockton, CA 432770 B8: Ventilation/Oxygen Deficiency Hazards —AEI personnel shall ensure that ventilation is increased to the maximum extent possible and that equipment generating combustion exhaust is vented to the exterior of the building in which they are performing work. If direct air monitoring readings suggest an oxygen deficiency and/or the build-up of harmful substances, take measures to increase work zone ventilation or evaluate alternatives but be prepared to immediately leave the area. 139: Heat Stress — Heat stress can be a significant hazard, especially for workers wearing protective clothing. Depending on the ambient conditions and the work being performed, heat stress can occur very rapidly, within as little as 15 minutes. Site personnel will be instructed in the identification of a heat stress victim, the first-aid treatment procedures for the victim and in the prevention of heat stress incidents. Workers will be encouraged to immediately report any heat-related problems that they experience or observe in fellow workers. Any worker exhibiting signs of heat stress and exhaustion should be made to rest in a cool location and drink plenty of water. Emergency help by a medical professional is required immediately for anyone exhibiting symptoms of heat stroke, such as red, dry skin, confusion, delirium, or unconsciousness. Heat stroke is a life threatening condition that must be treated by competent medical authority. ACGIH screening criteria for heat stress exposure in degrees Celsius for an 8-hour work day 5 days per week with conventional breaks will be used in determining safe exposure for acclimatized and acclimatized employees. Acclimatized Action Limit Allocation of (Unacclimated) Work in a Work/Rest Cycle Light Moderate Heavy Heavy Light Moderate Heavy Very Heavy_ 75100% 31.0 28.0 28.0 25.0 (87.8F) (82.4F) (82.4F) (77F) 50-75% 31.0 29.0 27.5 28.5 26.0 24.0 (87.8F) _ (940 F) (81.5) (83.3F) (78.8F) (75.2F) 25-50% 32.0 130.0 29.0 28.0 29.5 27.0 25.5 1 24.5 (89.6F) (86F) (84.2F) (82.4F) (85.1F) (80.6F) (77.9) (76.1F) 0-25% 32.5 31.5 30.5 30.0 30.0 29.0 28.0 27.0 (90.5F) (88.7F) (86.9F) (86F) (86F) (84.2F) (82.4F) (80.6F) Heat Stress Prevention Whenever possible or within the control of AEI, engineering controls should be utilized to protect workers from heat related hazards. For example, isolation from the heat source, ventilation such as open windows, fans or other methods of creating air flow, and heat shielding such as awnings or umbrellas. Appropriate work practices can also lessen the chances of heat related hazards. Some of these include: