40 Hour HAZWOPER Training or OSHA 40 is designed more for workers that deal with hazardous materials directly, including facilities where HAZMAT is prepared, packaged, labeled, marked, stored, or shipped for disposal and for any facility wherein hazardous wastes are treated, stored, or disposed of.
24 Hour Training or OSHA 24 is for workers working at these facilities but don’t have any responsibility to deal directly or handle any hazardous materials EX: drillers, surveyors, contractors, administrative personnel & drivers. Many companies will make workers get the 40 Hours course to make sure they are ready for any situation.