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April 2013 -are Project No. 1301-0621 associates,Fo® Inc. K HAZARD EVALUATION Chemicals Onsite. The following substance(s) are known or suspected to be onsite. The primary hazards of each are identified along with their concentrations, if known. Substance Involved Primary Hazard Concentration Petroleum hydrocarbons in soil Ingestion, inhalation and dermal contact Unknown BTEX, MTBE Ingestion, inhalation and dermal contact Unknown 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. Certain equipment (drill rig, percussion hammer) 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, earmuffs) 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 drill holes will be advance using a hand auger and direct push drilling technology. The potential for employee exposure to heavy equipment hazards is considered moderate during field activities. 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) has to be maintained between the drilling rig and any identified overhead utilities. Underground Service Alert (USA North) will be contacted to mark all underground facilities in the vicinity of intrusive activities. Additionally, a private utility locating company will utilized to identify utility near each propose drill hole. Since the work is being performed along an existing piping corridor, the potential for employee exposure to utility hazards is moderate. Heat Stress. High temperatures, direct sun, use of PPE, and labor-intensive activities 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 be performed in the spring months. Plenty of water will be available to maintain hydration. 13.0621_Kaiser Stockton_JWP-HSP_revised -A4-