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JOB HAZARD ANALYSIS: <br />Hazards likely to be encountered on-site include those commonly <br />encountered when operating any mechanical equipment, such as the <br />danger of falling objects or moving machinery. Simple precautions <br />will reduce or eliminate risks associated with operating such <br />equipment. It will also be noted the close working conditions with <br />traffic entering the Quick Stop Market, and all precautions will <br />be taken to assure a smooth flow of traffic in and out of the <br />location. A crane comlpany has been employed to operate all <br />lifting equipment. Qualified personnel only will have any contact <br />with this equipment. All on-site personnel are required to wear <br />hard hats when in close proximity to lifting equipment. Latex <br />sampling gloves will be worn by persons collecting or handling <br />samples to prevent exposure to contaminants. Gloves will be <br />changed between samples, and used ones discarded, to avoid cross - <br />contamination. Proper respitory equipment will be worn if vapor <br />contamination levels on-site exceed action levels as determined <br />using PID. Furthermore, no on-site smoking, open flame, or sparks <br />will be permitted to prevent accidental ignition. <br />RISK ASSESSMENT SUMMARY: <br />Exposure to chemicals anticipated on-site include volatile <br />aromatics such as benzene, toluene, xylene, and ethylbenzene. <br />These chemicals represent a hazard because they are moderately to <br />extremely toxic and highly flammable. Threshold Limit Values <br />(TLV's), Short Term Exposure Limits (STEL's), and Toxicity Levels <br />(LD 50, oral -rat), all in mg/kg (ppm) are listed below: <br />Compound <br />TLV <br />STEL <br />Toxicity <br />Benzene <br />10 <br />25 <br />4894 <br />Toluene <br />100 <br />150 <br />5000 <br />Xylene <br />100 <br />150 <br />4300 <br />Ethylbenzene <br />100 <br />150 <br />4300 <br />Benzene is considered an extreme cancer hazard. Applicable MSDS <br />forms are attached. <br />EXPOSURE :MONITORING PLAN: <br />A Photo -Ionization Detector (PID) will be used to monitor vapor <br />concentrations around the site. Should concentrations exceed <br />TLV's, protective measures will be taken. Passive dosimeter badges <br />will be placed in downwind locations if PID readings indicate high <br />levels of volatile organics in the breathing space. <br />PERSONAL PROTECTIVE EQUIPMENT <br />All personnel on-site will have access to respirators with organic <br />vapor cartridges. Replacement cartridges will be available on-site <br />as needed. When handling samples, the on-site geologist will wear <br />