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AECOM Heat-Related Illness Prevention Shade is required when the temperature exceeds 80 degrees Fahrenheit(°F). One or more shaded areas will be established at all times, the shaded area will either open to the air or provided with ventilation or cooling (such as an air conditioned vehicle). The amount of shade present shall be at least enough to accommodate the number of employees on a rest/recovery/meal/break period at any given time, so that they can sit in a normal posture fully in the shade without having to be in physical contact with each other. The shaded area shall be located as close as practicable to the areas where employees are working, but no more than a 2.5 minute walk away. Access to shade will be undeterred (free from obstacles or other barriers, such as crossing traffic). The shaded area will be away from portable toilets, and in a clean, dry and otherwise hazard-free environment. Employees shall be allowed and encouraged by supervisors and other field team members to take a cool- down rest in the shade when they feel the need to do so to protect them from overheating. Additionally, schedule breaks in accordance with the work-rest cycle shall be taken in the shaded area. Examples of appropriate access to shade: • Buildings, canopies, lean-tos, or other partial or temporary structures that are either ventilated or open to air movement. • Trees and dense vines can provide shade that is superior to artificially provided shade and are accepted as compliant sources of shade as long as branches, thorns, and the plant itself do not pose added harm to the employee. • The interior of a vehicle may only be used to provide shade when the vehicle is air-conditioned and the air conditioner is operating. 1.1.5 Work Rest Cycles and Breaks It is necessary to implement a work routine that incorporates adequate rest periods to allow employees to remove protective clothing, drink fluids (vital when extreme sweating is occurring), rest and recover. The frequency and length of work breaks must be determined by the SSO based upon the ambient temperature, amount of sunshine, humidity, the amount of physical labor being performed, the physical condition of the employees, and protective clothing being used. The following guidelines shall be used to determine frequency and duration of rest breaks. Adjusted Temperature Method This method can be utilized where wet bulb globe temperature(WBGT)data is not available, and requires only that the ambient temperature (in °F) be known. Adjustment factors are applied to the ambient temperature to account for departures from ideal conditions (sunny conditions, light winds, moderate, humidity and a fully acclimated work force). The adjustments should be made by addition or subtraction to the ambient temperature reading, or changes in table position, as indicated in Table 1-1. Adjustments are independent and cumulative, and all applicable adjustments should be applied. The result is the Adjusted Temperature, which can be compared with the values in Table 1-2 (see below). May 2015 Page 4 of 10