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s a s <br /> B. Action Level Table for Chemical Monitoring* <br /> MONITORING <br /> CHEMICAL MONITORING FREOUENCY/ LEVEL FOR LEVEL FOR WORK <br /> (OR CLASS) EQUIPMENT TASK NO. LOCATION RESPIRATOR USE STOPPAGE <br /> (source,area or <br /> breathing zone). <br /> Volatile organics Thermo 3- 10 Sample every 10 minutes 10 ppm above 100 ppm-breathing <br /> Environmental at source If free product background-breathing zone or 250 ppm- <br /> 580B is encountered sample zone(and benzene tube source (and benzene <br /> Photoionization every five rrunutes non-detect) tube non-detect) <br /> Detector 10 0 ev If>5 ppm, sample in <br /> lamp set for breathing zone <br /> maximal response <br /> to benzene <br /> BTEX Drager 0 51a 3- 10 If PID>5 ppm above Any tube discoloration 2 ppm-breathing zone <br /> (benzene) benzene tube background in breathing <br /> zone For a minimum of 1 <br /> minute from drager tube <br /> Explosive Vapor 02/1,E L 5-8 Prior to disturbance and NIA LEL>10%02 <br /> to confirm Oa� 19 S% <br /> inertinglpurging Oz>22% <br /> Record peak readings every 30 minutes,or more frequently as necessary <br /> Set alarm on instrument at 10 ppm. <br /> Calibrate equipment every slay-to isobutylene for PID,fresh air and hexane for the 0-,/L E L respectively <br /> Leak check colorimetric tube pump daily <br /> FII.£NAME ssp- <br />