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APP/SSHP Soil Excavation at California National Guard Armory Lodi, California a. Drinking water shall be made available to employees and employees encouraged to frequently drink small amounts, e.g., one cup every 15-20 minutes; the water shall be kept reasonably cool. b. Tool box training in hot environments shall include training on the symptoms of heat related problems, contributing factors to heat related injuries, and prevention techniques. c. When possible, work should be scheduled for cooler periods during the day. d. Individuals shall be encouraged to take breaks in a cooler location, and use cooling devices as necessary, such as cooling vests, to prevent heat related injury. A buddy system shall be established to encourage fluid intake and watch for symptoms of heat related injury. e. SSHO shall monitor those individuals who have had a previous heat-related injury, are known to be on medication, or exhibits signs of possibly having consumed large amounts of alcohol in the previous 24 hours for signs, or indicating symptoms of heat related injuries. f. Individuals who are not acclimatized shall be allowed additional breaks. The period and number should be determined by the SSHO and provided to the supervisor and employee for implementation. 06.1.04 In situations where heat stress may impact employee safety and health, employee acclimatization and workloads shall be assessed and work/rest regimens shall be established. For employees in permeable work clothing, Wet Bulb Globe Temperature (WBGT) Index or physiological monitoring shall be conducted and work/rest regimens established. The SSHO will assess the condition of the employees, specific weather conditions, work tasks, and other environmental factors and conditions to determine when to begin monitoring. For employees in impermeable work clothing, only physiological monitoring shall be conducted, and work/rest regimens and fluid replacement schedules shall be established. 8.1.5 OTIE Monitoring Method Using Heat Index for Physiological Monitoring OTIE proposes to monitor heat stress using the Kestrel 4000 Pocket Weather Tracker manufactured by Nielsen Kellerman. OTIE has successfully used this device on several project sites. This device measures the following heat stress parameters: temperature, wind chill, heat index and wet bulb temperature. We propose to use the Heat Index as a primary indicator of exposure to environmental heat conditions. The Heat Index is a function of temperature and relative humidity (see Figure 2). The combination of the two results provides an apparent temperature which gives an idea of what it would feel like under normal-to-low humidity conditions. The heat index also applies to shady, light wind conditions, so it feels even hotter than the heat index if a person is in direct sun. In the midst of a hot, dry, wind a person would also feel hotter than the heat index value due to the wind effects. OTIE 28