Is there really a chlorine alternative?

Is there anything out there that works as good as bleach but wont require recovery on sensitive commercial areas?

What are you cleaning?

This one in particular is concrete walls.

Okay, what are you removing from the concrete walls?

Usual suspects… Mold and algae

No

What would require recovery?
And why?

If your going to use bleach just keep your runoff away from storm drains and you should be fine.