Comment by duskdozer

Casually looking at classifications at https://www.ecfr.gov/current/title-40/chapter-I/subchapter-D...

it seems that you could be hitting an edge case that inconveniences you. On the other hand if the classification were made irrelevant, someone working with Class V "Air conditioning return flow wells used to return to the supply aquifer the water used for heating or cooling in a heat pump;" might be aggravated by being held to the same standard as Class I "Wells used by generators of hazardous waste or owners or operators of hazardous waste management facilities to inject hazardous waste beneath the lowermost formation containing, within one quarter (1⁄4) mile of the well bore, an underground source of drinking water.". Because if the regulations were merged, it would be inappropriate not to use the stricter safety standard of all.