Question

prior to the passage of laws concerning hazardous waste, what was the usual method of dealing with hazardous waste in the united states?
surface impoundments
dumping into waterwaysinjection wells
underground storage

Explanation:

Before hazardous - waste laws, surface impoundments were a common method for dealing with hazardous waste in the US. They are man - made depressions on the land surface used for storing waste.

Answer:

surface impoundments