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SITE-SPECIFIC HEALTH AND SAFETY PLAN FOR PHASE II ENVIRONMENTAL SITE ASSESSMENT <br /> Potential Airborne Concerns and Air Monitoring Action Levels <br /> July 7, 2023 <br /> Abbreviation Explanation <br /> IDLH Immediately Dangerous to Life or Health <br /> TLV Threshold Limit Value set by the ACGIH (American Conference of Governmental Industrial Hygienists; 8-hour TWA) <br /> AIHA WEEL Workplace Environmental Exposure Level set by the AIHA(American Industrial Hygiene Association) <br /> SKIN Skin Absorption is a significant potential contributor to total exposure <br /> NIOSH National Institute for Occupational Safety and Health <br /> CNS Central Nervous System <br /> CVS Cardiovascular System <br /> Air Monitoring Action Levels <br /> Chemical Monitoring Task Monitoring Frequency/ Level For Respirator Level For Work <br /> (or Class) Equipment Location Use Stoppage <br /> Volatile Organic PID as appropriate While onsite during Air monitoring instrument should Respirator to be used At 25 ppm in breathing <br /> Vapors for chemicals of disruption of soil or be"bump checked"with will be full-face piece zone, Stop Work <br /> concern. Read where VOCs are standard calibration gas prior to respirator with organic immediately. <br /> manual to determine. likely to be present. use. vapor/P 100 combination <br /> Sampling will be continuous cartridges. Continuously attempt to <br /> during the project while determine cause of <br /> disturbing potentially The level for respirator exposure and usage of <br /> contaminated soil or use will be 5 ppm on the engineering controls to <br /> uncovering/removing tanks and PID, sustained for two attempt to never reach <br /> piping, or during drilling. At least minutes.At donning the stop work level. <br /> every 15 minutes in the respirator level, <br /> breathing zone. determine cause of <br /> Sample at the exclusion zone exposure and implement <br /> boundaries every 30 minutes. engineering controls to <br /> Continuously sample during reduce concentrations. <br /> each soil and groundwater <br /> sampling interval. <br /> Stantec <br /> 4.4 <br />