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%%WWI v <br /> will be held responsible to perform only those tasks for <br /> which they believe they are qualified. Provisions of <br /> this SSP are mandatory and all personnel associated with <br /> onsite activities will adhere strictly hereto. <br /> 3 .0 JOB HAZARD ANALYSIS <br /> Hazards likely to be encountered onsite include those <br /> commonly encountered when operating any mechanical <br /> equipment, such as the danger of falling objects or <br /> moving machinery. Simple precautions will reduce or <br /> eliminate risks associated with operating such <br /> equipment. <br /> A qualified drilling contractor will be employed to <br /> deliver and operate all drilling equipment. Only <br /> qualified personnel will have any contact with this <br /> equipment. All onsite personnel, including the drilling <br /> contractor and his employees, will be required to wear <br /> hard hats when in close proximity to drilling equipment. <br /> nitrile sampling gloves will be worn by persons <br /> collecting or handling samples, to prevent exposure to <br /> contaminants . Gloves will be changed between samples, <br /> and used ones discarded, to avoid cross-contamination. <br /> Proper respiratory equipment will be worn if vapor <br /> contamination levels onsite exceed action levels as <br /> determined using a Photo-Ionization Detector (PID) or <br /> ,%lo• Organic Vapor Analyzer (OVA) . Furthermore, no onsite <br /> smoking, open flame, or sparks will be permitted, to <br /> prevent accidental ignition of gasoline contamination. <br /> All personnel shall also adhere to the safety procedures <br /> and requirements of Chevron U.S.A. , Inc. <br /> 3. 1 Risk Assessment Summary <br /> Exposure to chemicals anticipated onsite as major <br /> contaminants, including benzene, toluene, and xylene <br /> (BTX) , ethylbenzene, gasoline fuel hydrocarbons, and <br /> tetraethyl lead, represents a hazard because they are <br /> moderately to extremely toxic and most are highly <br /> flammable. Threshold Limit Values (TLV's ) , Short Term <br /> Exposure Limits (STEL's) , and Toxicity Levels (LD50, <br /> oral-rat) , all in mg/kg (ppm) , are listed on the <br /> following page: <br />