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SECTION 5 <br /> EXPOSURE MONITORING PLAN <br /> Area and Personal Monitoring <br /> Air monitoring will be conducted to determine the presence of on-site <br /> hazardous conditions and will help determine the level of personal <br /> protection required for personnel. Environmental monitoring equipment <br /> includes a photoionization detector (PID) or a flame ionization detector <br /> (FID). Characterization with these instruments will determine airborne <br /> contaminants present and their concentrations in the workplace and will <br /> help assess worker safety. <br /> There may be two levels of air monitoring, dependent upon visual <br /> inspection of impacted soil made by the HSO and reading obtained from <br /> the PID or FID: <br /> • An initial air monitoring program that has been designed to <br /> quantitatively assess the personal exposure to the contaminants known <br /> or suspected to be present on site; and <br /> • A general area air monitoring program. <br /> Initial Air Monitoring Program <br /> The initial air monitoring program will be conducted to quantitatively <br /> assess the personal exposure of site workers to VOCs during the initial <br /> stages of the excavation activities. This will be accomplished through <br /> sampling and analysis of air samples attached to the worker taken when <br /> working in known contaminated areas. The HSO will initially monitor <br /> two workers during the first day of extraction well drilling. Air samples <br /> will be collected from the breathing zones of site workers with the highest <br /> potential exposure to hazardous constituents at the site as determined by <br /> the HSO. If site activities change significantly or additional chemical <br /> hazards are encountered, initial monitoring will be initiated after each <br /> event after consultation with the ERM DINS. <br /> 5-1 <br />