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November 2010 o�soolatoa, lno. Project No. 1001-0343 ® taoiasea,ae�ooaiT� 777 Pa'anaetr Instrument IReadirn Actlon Organic Vapors PID reads 0 to 40 ppm Work with caution and monitor air continuously PID reads 40 ppm to 500 ppm Don Level C with respirators(full face)or ventilate any confined spaces to <40 ppm PID reads 500 ppm to 1,500 Use supplied air or ventilate confined PPM spaces to<40 ppm. PID Photoionization Detector Physical Hazards Onsite. The physical hazards and potential for employee exposure to the hazards (i.e., low, moderate, and high) anticipated during the field investigation are discussed below. Noise. Drilling equipment and support equipment (i.e. trucks, compressors, generators) will generate noise during field activities. This type of equipment may exceed 85 decibels (dBA), which is protective of workers. Therefore, field personnel working in and around such equipment will don PPE (ie., earplugs) that is protective of noise generation above 85 dBA. Heavy Equipment. The hazards involved with using heavy equipment (e.g., drilling rig, forklift, pick-up trucks, etc.) include impact from moving parts; pinch points; entrapment in machinery; electrocution from buried and overhead utilities; and improper operation. The potential for employee exposure to heavy equipment hazards is considered high during drilling. Slips, Trips and Falls. Site activities can pose a variety of slip, trip and fall hazards. Examples that contribute to slips, trips and falls include uneven ground surfaces and slick or wet surfaces, and unstable earth slopes. The potential for employee exposure to slips, trips and falls is low to moderate during field activities. Overhead and Underground Utilities. Typical site activities such as movement of equipment or intrusive activities such as subsurface drilling can present the risk of contact with overhead or underground utilities. A safe distance (10 to 15 feet) will maintained between the drilling rig and any identified overhead utilities. Additionally, Underground Service Alert and a private utility locating company will be utilized to mark all underground facilities in the vicinity of intrusive activities. All drill holes will be hand cleared prior to mechanically advancing drill rod. The potential for employee exposure to utility hazards is high during field activities. Heat Stress. High temperatures, direct sun, use of PPE, and labor-intensive activities 1 may contribute to heat stress. Heat stress can involve a high risk of illness of death. Exposure to heat stress at this site is considered low, because field work will most likely be performed in the winter or spring months. IIO.OU3.TWP-HSP-aM&wem - B -4 -