We currently are dumping our left over acid (acid we can't get to in the bottom of barrel) and torn bags of bicarbonate (powder) into the grass back behind the clinic. It kills the grass hard core, but I explained to everyone that it is safe. They said prove it... How?

On the ground?
Doesn't your unit have a drain in the floor maybe in the water room that you could pour the unused concentrate in?
Maybe your dumpster would be a good place for the bicarbonate powder.
Regardless of whether or not its "safe", dumping trash on the ground is increasingly frowned upon.
I'm not trying to be condescending, but I think you have a strange question here.

The powder and acid are in liquid/powder form. It is absorbed by the ground, so it is not littering. I was just needing proof that it is safe for the environment. At some points we have acid that expires. There's no way to make a 55 gallon container of acid go in a floor drain.

<dewd>,Expires? The only things with a longer shelf life than acid are Twinkies and cockroaches!

Who would allow a 55 gallon drum of concentrate to sit long enough to expire? Apparently the inventory tech is ordering too many supplies...
Anyway it would still be better to pour the liquid down a floor drain or mop sink followed by plenty of water...

It was actually the bicarb that expired.. the acid had to be dumped (4 barrels) bcuz it was 9000 series, we switched to 4000 series. Why a drain and not the ground? Explain please.

If you read the MSDS on the Acid it says to dispose of into a sanitary sewer, not into the enviorment (storm drain or grassy knoll). We got fined by the county a number of years ago because I misunderstood this point and dumped leftover concentrate from a drum onto a dirt area that eventully ran into a storm drain. The county haz-mat team was called out by a neighbor. The Haz-Mat people determined the PH of what was in the storm drain, made us hire a company to clean out the drain and fined us $3000. Ever since then I pumped out as much as I could out of the drums, closed up the drum and let Fresenius deal with whatever was left in the drum.

"it kills the grass hard core" doesn't that answer your own question?
Sodium Chloride and Potassium chloride are toxic to the environment. This is why many municipalities are moving away from the use of road salt.

Ya it kills grass and it wont go anymore. But the deers love acid but not the bicarb. But its not good for the environment grass, trees etc. To many different minerals that wasnt meant to water the grass with, soduim, potassium chloride etc.