disposal question

[tropical wave]

how does everyone handle disposal of different items? Such as things like empty sealer pails, or even liquids......after I clean out the lines from spraying wood chems I end up with buckets of stuff that needs to go....I re-use the liquid that is in the lines like sealer or OX and I'll run the hose back into the bucket and capture as much as I can, but cleaning out the pumps, running mineral spirits thru the hoses and cleaning brushes, paddles and then flushing everything with water etc, this adds up to a bucket of s___ that I need a better way of disposing (properly would be a benefit)......