Laserfiche WebLink
Zone 1 - Exclusion Zone: The Exclusion Zone, the innermost of <br /> three areas, is the zone where contamination does or could <br /> occur. All people entering the Exclusion Zone must wear the <br /> appropriate Level of Protection . An entry and exit check <br /> points must be established at the boundary of the Exclusion <br /> Zone to regulate the flow of personnel and equipment into and <br /> out of the zone and to verify that the procedures established <br /> to enter and exit are followed. <br /> The outer boundary of Zone 1, the Hotline, is initially <br /> established by visually surveying the immediate surroundings <br /> of the site and determining where the hazardous substances <br /> involved are located, where any drainage, leachate, or <br /> spilled material is, and whether any discolorations are <br /> visible . Guidance for determining the boundaries is also <br /> provided by data from the initial site survey indicating the <br /> presence of organic or inorganic vapors/gases or particulates <br /> in air, combustible gases, and radiation, or from the results <br /> of water and soil sampling. <br /> Additional factors that should be considered in determining <br /> Exclusion Zone boundaries include the required distance <br /> between the zone and the outer boundaries of the site to <br /> prevent fire or explosion from affecting personnel outside <br /> the zone, the physical area necessary to conduct site <br /> operations, and the potential for contaminants to be blown <br /> from the area. Once the Hotline has been determined, it <br /> should be physically secured, fenced, or well-defined by <br /> landmarks . During subsequent site operations, the boundary <br /> often may be relocated as more information becomes available . <br /> Subareas Within the Ex lesion Zone: All personnel within the <br /> Exclusion Zone must wear the required Level of Protection. <br /> Personal protective equipment is designated based on site- <br /> specific conditions, including the type of work to be done <br /> and the hazards that might be encountered. Frequently, <br /> within the Exclusion Zone different Levels of Protection are <br /> justified. Subareas should be specified and the required <br /> Level of Protection conspicuously marked. The Level of <br /> Protection is determined by the measured concentration of <br /> substances in air, the potential for contamination, and the <br /> known or suspected presence of highly toxic substances . <br /> Different Levels of Protection in the Exclusion Zone might <br /> also be designated by job assignment . For example, <br /> collecting samples from open containers might require Level B <br /> protection, while walk-through ambient air monitoring might <br /> require only Level C protection. The assignment, when <br /> appropriate, of different Levels of Protection within the <br /> Exclusion Zone generally makes for a flexible, effective, and <br /> 10-16 <br />