tobacco spitting on the floor & drains

hello,
this is my first time posting on the site, i am a hr professional in an auto collision repair facility of 19 employees. i am encountering a problem with employees who chew tobacco. they are spitting on the floors and in the drains. at first this was very rare to see in the shop areas. now, it is becoming a problem. you now have to watch where your step. the drains are for water to flow through. i have a non smoking policy inside the shop area because of the hazardous and flammable conditions that can exist within a repair facility. other employees are now complaining about the situation. please, i need help on handling this situation in a tractful and legal manner.
this is my first time posting on the site, i am a hr professional in an auto collision repair facility of 19 employees. i am encountering a problem with employees who chew tobacco. they are spitting on the floors and in the drains. at first this was very rare to see in the shop areas. now, it is becoming a problem. you now have to watch where your step. the drains are for water to flow through. i have a non smoking policy inside the shop area because of the hazardous and flammable conditions that can exist within a repair facility. other employees are now complaining about the situation. please, i need help on handling this situation in a tractful and legal manner.
Comments
Once you post your revised policy, watch out for employees wandering around with a soda can all the time, if you allow them to drink beverages while working.
I happened to notice a restaurant employee's soda can had crusty brown residue around the opening. Turns out that was his "spit" can and he had a wad of chew in his mouth all the time, even when serving customers. He'd been doing it "forever" he said, I just happened to notice it. He argued with me that if I couldn't tell, then neither could the guests. I told him now that I DO know, he needs to stop.
Either he DID stop or was savvy enough to get rid of it when I was around. x;-)