What do these acronyms stand for? EPA Environmental Protection Agency ·NIOSH National Institute for Occupational Safety and Health REI Restricted Entry Interval PPE Personal Protective Equipment PHI Pre-Harvest Interval Al Active Ingredient LD50 Lethal Dose 50What do these acronyms What do these acronyms stand for? stand for? • EPA • NIOSH • REI • PPE • PHI • AI • LD50 Environmental Protection Agency Environmental Protection Agency National Institute for Occupational Sa National Institute for Occupational Safety and Health Restricted Entry Interval Restricted Entry Interval Personal Protective Equipment Personal Protective Equipment Pre-Harvest Interval Harvest Interval Active Ingredient Active Ingredient Lethal Dose 50 Lethal Dose 50