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4 . 0 RISK ASSESSMENT SUMMARY <br /> 4 . 1 TO OTHER WORKERS <br /> The hazards applicable to ancillary workers will be <br /> evaluated by the job site Foreman each day . <br /> 4 . 2 TO THE ENVIRONMENT <br /> Hazards to the environment deal primarily with the risk of <br /> contaminant expansion . <br /> 4 . 3 TO THE PUBLIC <br /> Due to security measures preventing public access , and <br /> because the age and nature of the contaminants make the <br /> chance of danger beyond the work zone negligible, there is <br /> a low level of risk to the public in the scope of this <br /> project . <br /> 5 . 0 EXPOSURE MONITORING PLAN <br /> This section describes the monitoring that will be done on <br /> the site to prevent exposure to chemical hazards . <br /> 5 . 1 EQUIPMENT TO BE USED <br /> Airborne contamination and vapor concentrations will be <br /> measured primarily by the use of a direct reading instrument <br /> such as a photoionization detector , and should <br /> concentrations reach established levels Drager tubes will be <br /> used to determine the presence of Benzene. <br /> 5 . 2 LOCATION OF MONITORING <br /> To be determined by the sampling time at the time of the <br /> monitoring , based on site conditions and project progress . <br /> 5 . 3 FREQUENCY OF MONITORING <br /> To be determined by the sampling time at the time of the <br /> monitoring , based on site conditions and project progress . <br /> 6 . 0 PERSONAL PROTECTIVE EQUIPMENT <br /> Page - 9 <br />