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C . Hard hats will be worn during all drilling <br /> activities . <br /> d . Disposable clothing will be properly disposed of at <br /> the completion of the ,fob . <br /> 2 . Respiratory/Eye Protection <br /> a . During drilling activities , ambient air and soil <br /> vapor shall be continuously monitored by a Draeger <br /> tube sampler and an explosive meter . <br /> b . Site perimeter shall also be monitored on 30 minute <br /> intervals . Monitoring frequency would be increased <br /> by the site manager if conditions approach alarm <br /> level . <br /> SITE PERSONNEL <br /> Breathing zone vapor concentrations at the borehole greater than <br /> the Permissible Exposure Limits (PELs) require site personnel to <br /> use a respirator with organic vapor cartridges and goggles . <br /> Breathing zone vapor concentrations at the borehole that approach <br /> the maximum element capacity of the organic vapor cartridge <br /> requires site manager to monitor site perimeter (concentrating in <br /> the down wind direction) . <br /> Breathing zone vapor concentrations at the borehole that exceed <br /> the maximum element capacity of the organic vapor cartridge <br /> requires site activities to be stopped until concentrations <br /> decrease . Site manager should continuously monitor site <br /> perimeter . <br /> SITE PERIMETER <br /> Breathing zone concentrations at site perimeter less than the <br /> PEL , site manager shall monitor on 30 minute intervals unless <br /> notified by project personnel of elevated readings . <br /> Breathing zone concentrations at the site perimeter greater than <br /> the PEL , site manager shall continuously monitor conditions on <br /> site boundary concentrating in the down wind direction <br /> Breathing zone concentrations at site perimeter greater than the <br /> PEL , site manager shall continuously monitor conditions If the <br /> PEI, continues to be exceeded for 15 minutes , drilling activities <br /> shall be stopped <br />