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LHealth and Safety Plan <br /> Cleanup and Abatement Order No 5-00-707 EAI Project No 1232 <br /> 7.0 EXPOSURE MONITORING PLAN <br />' Exposure monitoring will be conducted during Site activities to provide real-time monitoring <br /> data which will be used to determine the equipment, procedures and other requirements <br />' necessary to ensure the safety of EAI personnel, to the degree feasible <br /> 7.1 Chemical Exposure Monitoring <br /> Prior to the start of field work, daily upwind background readings for hydrocarbon vapors will <br /> be obtained using a photoionization detector (PID), in order to document ambient readings (see <br /> Form 4) Site readings will be evaluated against these background readings, i e , if an action <br /> level is listed at 15 ppm, it is evaluated as 15 ppm above background <br /> An HNU gas analyzer, PID, will be used to monitor for hydrocarbon vapors The PID will be <br /> used on a continuous basis, with readings recorded approximately every 10 minutes, to monitor <br /> in the immediate vicinity of the work area If readings exceed an average of 15 ppm for more <br /> than one minute, monitoring within the worker's breathing zone will be conducted <br /> immediately <br /> ' A worker's breathing zone reading above 15 ppm for more than one minute will require the use <br /> of half-face respirators with organic vapor cartridges A worker's breathing zone reading <br /> above 75 ppm for more than one minute will require the use of full-face respirators with <br /> organic vapor cartridges If the PID reads more than 300 ppm instantaneously (> 5 seconds) or <br /> 150 ppm for more than one minute, work will stop, and the workers will move upwind while <br /> the vapors dissipate or alternative forms of protection or engineering controls are added The <br /> table below presents a summary of the response criteria for air monitoring <br /> (WBZ =Worker's Breathing Zone) *Above background readings <br /> Analyzer Reading* Location Time Period Action <br /> PID—Hydrocarbon Vapors <br /> < 15 ppin Immediate vicinity of ------ Continue monitoring <br /> work area <br /> > 15 ppm Immediate vicinity of > 1 minute Conduct monitoring to <br /> work area WBZ <br /> > 15 ppm WBZ > 1 minute Half-face respirator with <br /> organic vapor cartridge <br /> >75 ppm WBZ > 1 minute Full-face respirator with <br /> organic vapor cartridge <br /> ' > 150 ppm WBZ > 1 minute Stop work, move upwind <br /> or while vapors ,dissipate <br /> ' > 300 ppm WBZ instantaneous 1f elevated levels remain <br /> cover affected area with <br /> clean soil, heavy plastic <br /> sheeting or foam <br /> ' sAii I232CAOHASP —13- <br /> ENVIRONMENTAL AUDIT, INC B <br />