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September2007 padre <br /> Project No.0701-2621 +seuoSatss, Inc. <br /> EXOIXEERS.OEOLOOIS <br /> ' ® ENVIRONMENTAL SCIENTISTS <br /> HAZARD EVALUATION <br /> Chemicals Onsite. The following substance(s) are known or suspected to be onsite. <br /> The primary hazards of each are identified along with their concentrations, if known. <br /> ' Substance Involved Primary Hazard Concentration <br /> ' Petroleum hydrocarbons in soil Ingestion, inhalation and dermal contact Unknown. <br /> Pesticides in soil Ingestion, inhalation and dermal contact Unknown, <br /> ' Creosols in soil Ingestion, inhalation and dermal contact Unknown, <br /> Metals in soil Ingestion, inhalation and dermal contact Unknown, <br /> 1 Parameter Instrument Reading Action <br /> ' Organic Vapors PID reads 0 to 40 ppm Work with caution and monitor air <br /> continuously <br /> PID reads 40 ppm to 500 ppm Don Level C with respirators(full face)or <br /> 1 ventilate any confined spaces to <40 <br /> ppm <br /> PID reads 500 ppm to 1,500 Use supplied air or ventilate confined <br /> ' ppm spaces to<40 ppm. <br /> PID Photoicnization Detector <br /> 1 Physical Hazards Onsite. The physical hazards and potential for employee exposure <br /> to the hazards (i.e., low, moderate, and high) anticipated during the field investigation are <br /> discussed below. <br /> ' Noise. Drilling equipment and support equipment (i.e. trucks, compressors, generators) <br /> will generate noise during field activities. This type of equipment may exceed 85 decibels <br /> 1 (dBA), which is protective of workers. Therefore, field personnel working in and around such <br /> equipment will don PPE (ie., earplugs) that is protective of noise generation above 85 dBA. <br /> Heavy Equipment. The hazards involved with using heavy equipment (e.g., drilling rig, <br /> forklift, pick-up trucks, etc.) include impact from moving parts; pinch points; entrapment in <br /> machinery; electrocution from buried and overhead utilities; and improper operation. The <br /> ' potential for employee exposure to heavy equipment hazards is considered high during <br /> excavation. <br /> ' Slips. Trips and Falls. Site activities can pose a variety of slip, trip and fall hazards. <br /> Examples that contribute to slips, trips and falls include uneven ground surfaces and slick or <br /> ' wet surfaces, and unstable earth slopes. The potential for employee exposure to slips, trips <br /> and falls is low to moderate during field activities. <br /> ' <br /> 071e21,T Aoc <br /> -A4 - <br />