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3 <br /> OSHA is 400.parts per million(ppm)and the threshold limit value(TLV)set by the American Conference <br /> of Governmental Industrial Hygienist(ACGIH) is 400 ppm. Inhalation exposure to diesel fuel can be <br /> controlled through supplied air respirators,however,ventilation in the open`normally requires no <br /> respiratory protection. The use of skin protection,(i.e.chemically-protective gloves) is required when <br /> handling petroleum-contaminated materials. . <br /> 3.3.2 Physical Hazards <br /> Physical hazards associated with this project include: vehicular traffic; drilling; slipping,tripping, and/or <br /> falling; heavy equipment;noise; underground and overhead utilities;;and heat stress. <br /> Vehicular Traffic <br /> The site investigation is being conducted within the vicinity of an existing maintenance yard. Traffic <br /> control may be required to protect the field staff and supervisory personnel: Personnel in each crew shall be <br /> 4 designated with the responsibility of monitoring maintenance vehicle traffic while work is in progress at the <br /> site. Personnel may be required to wear orange reflective vests when working on or adjacent to roadways. <br /> Slipping, Tripping, and Falling <br /> All on-site personnel are to be aware of hazards from uneven terrainl� Personnel must maintain clear footing <br /> and identify obstructions,holes, and other tripping hazards at the job'site. If work occurs near a fall hazard, <br /> l� including excavations made for sampling purposes,the edge will be clearly marked with caution tape, and <br /> 1 all on-site personnel will be made aware of the hazard. i <br /> Heavy Equipment <br /> Drill rigs and other heavy equipment present a number of physical hazards to personnel working near them. <br /> Cables may break under stress; rocks or metal parts may become projectiles during operation of equipment; <br /> drums,augers,or other equipment may fall on unprotected appendages; clothing or body parts may become <br /> tangled in moving parts of machinery; and steam cleaning equipment can cause severe bums. Personnel <br /> working near equipment should know how to turn the equipment off.in the event of an emergency. All <br /> personnel onsite are required to wear hard hats and steel-toed boots.!l Safety glasses are required when <br /> I} <br /> working near projectile hazards or splash or,spray hazards(steam cleaning drill rigs). Awareness of the <br /> .t <br /> potential hazards associated with heavy equipment will reduce the likelihood of accidents. <br /> 6 <br /> I� j. <br />