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AIR MONITORING, HAZARDOUS ASSESSMENT,AND RISK ANALYSIS <br /> Air Monitoring <br /> The purpose of air monitoring is to identify and qualify airborne levels of hazardous <br /> substance in order to determine and verify the levels of employee protection required <br /> on site. There has been co contamination noted thus far on site. Air monitoring will <br /> not be performed unless previously undetected and significant contamination is <br /> discovered. <br /> Whenever it is suspected that employees may be exposed to concentrations of air- <br /> borne contaminants is excess of permitted of permitted levels, monitoring of work <br /> environment is required Evaluation assist in determining what control measures <br /> can be developed and implemented to reduce exposure. Sampling is accomplished <br /> by monitoring the immediate work area.Monitoring devices which con be used <br /> include: <br /> *OVM to detect total concentrations of Volatile Organic Compoands <br /> The decision to implement monitoring must be performed when working conditions <br /> change, such conditions in which it should be determined whether the possibility that <br /> exposures have risen include,but are not limited to the following: <br /> 1. When work begins on a different section of the site. <br /> 2. When new contaminants are suspected or found <br /> 3. When a new phase of operation begins. <br /> 4 When employees are working ion areas of obvious contamination. <br /> SITE MONUORINCrACTION LEVELS <br /> Organic Vapor Concentration Response or Action <br /> Less than or equal to 50 ppm protection No respiratory <br /> 50 to 100 ppm w/organic vapor cartridges Air purifying respirator <br /> 100 ppm and greater Cease work and take steps <br /> to reduce concentrations to <br /> acceptable levels. <br /> Benzene less than 0.5 ppm protection No Respiratory <br /> Benzene greater than 1 ppm Cease work and take steps to <br /> reduce concentrations to <br /> acceptable levels. <br /> Page 3 <br />