HAZWOPER 40 - FINAL
COMPREHENSIVE STUDY GUIDE 2026
FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ 40 hours + 3 days of of onsite supervised field experience.
Answer: amount of time training under HAZWOPER standard that general
site workers are required to complete
◍ 3 routes of exposure.
Answer: inhalation, ingestion, & skin contact
◍ 2 types of skin contact.
Answer: local and systemic effect
◍ local effect.
Answer: a response occurring at the site of application or exposure (ex.
chemical burn to the surface from a spill of hydrochloric acid)
◍ systemic effect.
Answer: internal effects requiring absorption into the body and distribution
(alcohol going into bloodstream)
◍ acute exposure.
Answer: short duration, single or brief occurrence
◍ chronic exposure.
Answer: longer duration, prolonged or repeated occurrences
◍ OSHA.
Answer: the only legal exposure levels for US workers are created by
◍ 8 hours a day for 40 hour work week.
, Answer: ACGIH threshold limit values for airborne concentrations
◍ LD50.
Answer: amount of a chemical which produces death in 50% of a
population; in mg/kg; smaller number is worse
◍ LC50.
Answer: concentration of chemical in an environment which produces death
in 50% of an exposed population; lower number is worse
◍ 4 Hazardous Waste Characteristics.
Answer: ignitability, corrosivity, reactivity, toxicity
◍ ignitability.
Answer: substances that easily catch fire
◍ corrosivity.
Answer: liquids or aqueous substances capable of corroding metal
containers, such as storage tanks and drums greater than a quarter inch per
year
◍ reactivity.
Answer: unstable under normal conditions; can cause explosions, toxic
fumes, gases, vapors, etc.
◍ toxicity.
Answer: wastes that are harmful or fatal when ingested or absorbed
◍ The manufacturer or importer.
Answer: who supplies the safety data sheet
◍ red.
Answer: fire warning color
◍ blue.
Answer: health warning color
◍ yellow.
Answer: reactivity warning color
COMPREHENSIVE STUDY GUIDE 2026
FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ 40 hours + 3 days of of onsite supervised field experience.
Answer: amount of time training under HAZWOPER standard that general
site workers are required to complete
◍ 3 routes of exposure.
Answer: inhalation, ingestion, & skin contact
◍ 2 types of skin contact.
Answer: local and systemic effect
◍ local effect.
Answer: a response occurring at the site of application or exposure (ex.
chemical burn to the surface from a spill of hydrochloric acid)
◍ systemic effect.
Answer: internal effects requiring absorption into the body and distribution
(alcohol going into bloodstream)
◍ acute exposure.
Answer: short duration, single or brief occurrence
◍ chronic exposure.
Answer: longer duration, prolonged or repeated occurrences
◍ OSHA.
Answer: the only legal exposure levels for US workers are created by
◍ 8 hours a day for 40 hour work week.
, Answer: ACGIH threshold limit values for airborne concentrations
◍ LD50.
Answer: amount of a chemical which produces death in 50% of a
population; in mg/kg; smaller number is worse
◍ LC50.
Answer: concentration of chemical in an environment which produces death
in 50% of an exposed population; lower number is worse
◍ 4 Hazardous Waste Characteristics.
Answer: ignitability, corrosivity, reactivity, toxicity
◍ ignitability.
Answer: substances that easily catch fire
◍ corrosivity.
Answer: liquids or aqueous substances capable of corroding metal
containers, such as storage tanks and drums greater than a quarter inch per
year
◍ reactivity.
Answer: unstable under normal conditions; can cause explosions, toxic
fumes, gases, vapors, etc.
◍ toxicity.
Answer: wastes that are harmful or fatal when ingested or absorbed
◍ The manufacturer or importer.
Answer: who supplies the safety data sheet
◍ red.
Answer: fire warning color
◍ blue.
Answer: health warning color
◍ yellow.
Answer: reactivity warning color
