This is a big problem for the multi-family industry and the removal can be as expensive as a water or fire damaged apartment. I have heard of communities gutting an apartment and replacing all of the A/C system and duct work!
Along with the second-hand-smoke issues we have all experienced, this is another reason communities are going Tobacco-Free. In our area, almost ALL new construction communities open as Tobacco-Free.
Not sure what state you are in but if you are in Florida, contact Florida Department of Health (TobaccoFreeFlorida.com). They have a great program to work with multi-family communities who are interested in what it takes to make the transition from smoke to smoke-free! They can help you put together a plan, give you tips on presenting to residents and advise you thru the transition. The also offer FREE signage, cesation classes, patches/gum and more. Check with your state for what they might have.