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' 9000562C, Page 4 <br /> operators and assistants are (1) flying objects- usually thrown by the spinning auger and <br /> (2) falling objects. The most common injuries are to the eyes, head and feet. <br /> B.4.2.1.2 The safety guidelines provided in Operating Procedure HS-509 (attached) <br /> should be observed by the drill rig operator. Where applicable, these guidelines will be <br /> provided to heavy equipment operators contracted by WCC. The operators, however, <br /> must accept full responsibility for safe operations of their equipment. <br /> B.4.2.2 Underground and Overhead Utilities <br /> B.4.2.2.1 All underground and overhead utilities shall be located. Prior to the <br /> commencement of field work the utility companies should be contacted to visit the site and <br /> map all utility lines (e.g., water, gas, telephone, and electricity). <br /> B.4.2.2.2 In addition, a geophysical survey should be conducted around each <br /> proposed boring location to evaluate the presence of any underground obstruction within 5 <br /> feet of the proposed boring location. <br /> B.4.2.3 Heat Stress <br /> B.4.2.3.1 Heat stress is the aggregate of environmental and physical work factors that <br /> constitute the total heat load imposed on the body. Types of heat stress are heat cramps, <br /> heat exhaustion and heat stroke. Heat stress can be fatal. <br /> B.4.2.3.2 Heat stress is of particular concern when workers must wear chemical <br /> protective clothing and/or ambient temperatures are high. Protective clothing reduces <br /> evaporative body cooling,resulting in increased heat load to the body. Heat stress could be <br /> a significant threat to personnel at the Defense Depot site because ambient temperatures in <br /> Tracy during March to August can reach well into the 80's. <br /> B.4.2.3.3 WCC heat stress guidelines are presented in Operating Procedure HS-102 <br /> (attached) and should be followed when ambient temperatures rise above 72 degrees F. <br />