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C GLOSSARY OF TERMS <br /> ACRONYMS AND ABBREVIATIONS <br /> II <br /> NIOSH National Institute for Occupational Safety and Health <br /> OBZ Operator's Breathing Zone <br /> OEL Occupational Exposure Limit <br /> i <br /> OSC Office Safety Coordinator <br /> i OSHA Occupational Safety and Health Administration <br /> l <br /> OVA Organic Vapor Analyzer (Foxboro-Century) <br /> PEL Permissible Exposure Limit <br /> r <br /> L PID Photoionization Detector i <br /> r PM Project Manager E <br /> ppb parts per billion <br /> ppm parts per million <br /> REL Recommended Exposure Limit <br /> SSO Site Safety Officer <br /> SSR Subcontractor's Safety Representative <br /> STEL Short Term Exposure Limit j <br /> TLV Threshold Limit Value (� <br /> UEL Upper Explosive Limit <br /> VOC Volatile Organic Compound <br /> 4 <br /> �i <br /> CHEVMERC.H50 iv <br /> 1 <br /> 4 <br /> i.a <br /> i <br />