Lead Safe vs. Lead Free

[John Matthews]

So my understanding was initially that in Philadelphia as a landlord you just needed to supply your tenants with the HUD "Protect your Family from Lead in your Home" Packet. I just came across this: http://www.phila.gov/health/childhoodlead/LeadPain... which states that in Philadelphia, PA we if we're renting to children aged 6 or younger we actually need to have our properties certified as lead paint or lead free. So with that said, for those of you who have had this done, what are the costs for the lead safe certification, roughly? Can I certify this myself?

Also, I know we can't refuse to rent to families with children, but are there ways to minimize the odds that families with children aged 6 or younger will apply, or anything like that?