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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 /> Potential Airborne Concerns <br /> Chemical (Or OSHA PEL Warning Routes of Chronic Health <br /> Class) ACGIH TLV Other Pertinent Limits Properties Exposure or Acute Health Effects Effects/Target <br /> Irritation Organs <br /> Diisopropyl . CalOSHA PEL- 0NIOSH REL 500 Colorless liquid Inhalation, Irritation eyes, skin, nose; Eyes, skin, <br /> Ether TWA 250 ppm ppm with a sharp, ingestion, skin respiratory discomfort; respiratory system, <br /> (DIPE) 0 FedOSHA PEL- 0IDLH 1,400 ppm sweet, ether-like and/or eye contact dermatitis; in animals: central nervous <br /> (Isopropyl TWA 500 ppm odor. drowsiness, dizziness, system <br /> Ether) ACGIH TLV 250 unconsciousness, narcosis <br /> ppm <br /> • ACGIH TLV STEL <br /> 15 MIN 310 ppm <br /> Ethyl Tertiary 0 Cal/FedOSHA PEL- • NIOSH REL None Extremely Inhalation, Irritation to the skin or Skin, eyes, <br /> Butyl Ether TWA None established flammable, clear, ingestion, skin eyes, respiratory tract, respiratory tract, <br /> (ETBE) established colorless liquid, absorption (slight) coughing, shortness of central nervous <br /> • ACGIH TLV 25 ppm week ether-like eyes breath, headaches, system, potential <br /> odor(13 ppm dizziness, drowsiness, carcinogen, potential <br /> odor threshold) narcosis, physical and mutagen. <br /> mental impairment, <br /> unconsciousness, central <br /> nervous system effects, <br /> vomiting, mild to severe <br /> pulmonary injury. <br /> Tertiary Amyl 0 Cal/FedOSHA PEL- NIOSH REL None Extremely Inhalation, Irritation to the eyes, skin, Nervous system <br /> Methyl Ether TWA None established flammable, clear, ingestion, skin respiratory tract,gastro reproduction system, <br /> (TAME) established colorless liquid absorption, eyes intestinal tract, nausea, potential carcinogen, <br /> • ACGIH TLV 20 ppm with a weak ether vomiting and diarrhea. potential mutagen. <br /> like odor <br /> Abbreviation Explanation <br /> PEL Permissible Exposure Limit set by OSHA(8-hour time-weighted average [TWA]) <br /> REL Recommended Exposure Limit set by NIOSH (8-hour TWA) <br /> C Ceiling Limit(not to be exceeded for any period of time) <br /> STEL Short Term Exposure Limit(15-minute average) <br /> Stantec <br /> 4.3 <br />