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r-" r, r-" r---, [-' r, r---", r"" r-, I--" r-' (77 <br /> C� <br /> Abbreviations: References: <br /> PEL Permissible Exposure Limit a. Guide to Occupational Exposure Values, ACGIH, 1992. <br /> NIOSH National Institute for Occupational Safety and Health <br /> ACGIH b. NIOSH Pocket Guide to Chemical Hazards, U.S. Department <br /> REL Recommended Exposure Limit of Health and Human Services, June 1990. <br /> ACGIH American Conference of Governmental Industrial <br /> Hygienists <br /> TLV Threshold Limit Value <br /> TWA Time Weighted Average <br /> STEL Short Term Exposure Limit <br /> IDLH Immediately Dangerous to Life and Health <br /> OSHA Occupational Safety and Health Administration <br /> * mg/m3 <br /> 93822 East Bay Municipal Utility District <br /> 40429200.wp 26 Work Plan-Stockton Service Center <br />