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0963c•-3 <br /> 4.0 HAZARD ASSESSMENT <br /> The interior of the facility has been cleaned out. The plating tanks <br /> have all been removed and the spilled material on the floors and in <br /> \�J ^ the sumps has all been removed. The floors and sumps have had their <br /> surfaces washed down. There is no standing liquid nor any open <br /> containers. <br /> The primary hazards are concrete dust contaminated with metals <br /> generated when the concrete floors are cored and the potential for <br /> skin contact with soil and water samples contaminated with heavy <br /> metals. Soil and water samples may also have a low enough pH to be <br /> mildly acidic. <br /> Table 1 identifies the chemical substances which may present some <br /> hazards to the field investigators. The table includes permissible <br /> exposure 3imits (PEL) established by the Occupational Safety and <br /> Health Administration (OSHA) and the Immediate Danger to life and <br /> Health (IDLH) levels established by National occupational Safety and <br /> Health (NIOSH) . <br /> TABLE 1 KNOWN SITE CONTAMINANTS <br /> Contaminant PEL IDLH <br /> Copper dusts and mists 1 mg/cu.m N.A. <br /> Nickel metal and soluble compounds 1 mg/cu.m N.A. <br /> '1 <br /> Lead and inorganic lead compounds 0.05 mg/cu.m variable <br /> Tin compounds, inorganic 2 mg/cu.m 400 mg/cu.m <br /> Due to the nature of the investigation, exposure to any of the hazards <br /> will be minimal. Therefore, if the Site Safety Officer observes dust <br /> to be approaching the breathing zone, he will require that respirators <br /> be worn. A tfa`ll-mask respirator with cartridges for dusts, mists and <br /> fumes is th"inimum acceptable respiratory protection. <br /> .J' � 7✓` <br />