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PM <br /> Hazardous Hazard Safe Work Practice <br /> Substance <br /> Benzene Prolonged and repeated exposures Same as above; See Air Monitoring <br /> cause anemia, lymphoma, and other Procedures below regarding benzene <br /> cancers in lab animals. Causes skin levels. <br /> and eye irritation. OSHA exposure <br /> limits: <br /> PEL: 1 ppm <br /> STEL: 5 m Same as above. <br /> Toluene Eye and respiratory irritant. <br /> PEL: 200 ppm <br /> REL': 100 ppm <br /> STEL: 150 m Same as above. <br /> Ethyl benzene Severely irritating to eyes at high <br /> concentrations. May cause dizziness. <br /> Highly irritating to mucous membranes <br /> of the nose. <br /> PEL: 100 ppm <br /> STEL: 125 m <br /> Xylenes Toxic:Vapors in high concentration Same as above. <br /> are anesthetic. Irritant to skin and <br /> upper respiratory system. <br /> PEL: 100 ppm <br /> STEL: 150 m respiratory Same as above. <br /> MTBE Irritating to eyes, skin and res <br /> tract. Can cause central nervous <br /> system depression. Listed as possible <br /> carcinogen to humans. <br /> No PELs/STELs. Supplied air <br /> respirator is recommended <br /> >40pPm. <br /> Lead Eye and respiratory irritant. Same as above <br /> OSHA PEL: TWA=0.050 mg/m' <br /> 5. AIR MONITORING PROGRAM <br /> The likelihood of encountering hazardous levels gasoline constituents during the performance of the work <br /> outlined in the Workplan is considered to be low, due to the low concentrations found in earlier sampling <br /> events. However, the air in the employees' breathing zone will be monitored periodically for the presence <br /> of hydrocarbons with a PID4. If the PID measures a level of 50 ppm for a sustained period of time (15 <br /> minutes), employees will immediately don their half-face respirators with organic vapor cartridges (modified <br /> Level C). <br /> If the PID ever measures hydrocarbon levels above 100 ppm, employees will immediately don their half- <br /> face respirators with organic vapor cartridges (modified Level C). <br /> ' hemical exposure. It is a time weighted average(TWA)concentration of <br /> REL is the Recommended Exposure Limit for a c <br /> chemicals allowed over an 8-hour work shift(not to be exceeded). <br /> 4 PID is a Photo Ionization Detector used to detect non-specific hydrocarbon vapor levels. <br /> 03009-10017-37100 <br /> 4 of 8 March 2014 <br />