I always love the gas will leak and contaminate the soil codes....as a plumber explained to me when I installed a floor drain which drains to day-light....
Suppose you spill gas while loading up your lawn mower while on your gravel drive way. Would you call the EPA and really worry about it ? No, by the time you got the hose, it would evaporate and not hurt the ground water....
So that same analogy for floor drain...draining to daylight offers the same evaporative protection....now if you have a commercial garage and are doing extensive solvent dumping, I'd say that'd be different...but me I wash my cars year round, wax them, work on things and yes I occasionally wash the floor and all goes down my garage floor drain...and whoosh out into day light....
My floor was poured so that all drains to my floor drain rather than to the door...i.e. I figured that in the winter, melting would promote a frozen door so all goes to the drain.
The idea of a container where everything goes to promotes fumes, combustion and explosion.....I could see after a bit of time the wrong chemicals mixed if not careful could promote something bad...rather have some dead grass than have to worry about a storeage tank buried and have to dig it up....
