Not sure I would share your view that waste company multiples are that high. They trade like commodity or service companies.
EV/Revenue Multiple 1.5 to 3.3x EV/EBITDA 10.2 to 11.8x EV/EBIT 14.6 to 18.4
The high end of the range is Waste Management the lower end of the range is regional players.
EBITDA margins in wast run between 11-27%. 27% is Waste Management and the lower range numbers are regional players.
ECOS won't trade as a waste company. It is distribution company so its revenue multiple will be closer to 1 and its EBITDSA multiple will be closer to 8%.