North Providence Mayor Charles Lombardi has been a member of the Resource Recovery Board of Commissioners for more than a decade. North Providence paid only $628 in 2018 for contaminated loads. But that number tripled in 2019 and this year the town is on pace to pay $7,540.“We’ve had a couple of contaminated loads,” Lombardi said. “Do I like it? Absolutely not. Do I know why and do I understand why it’s happening? Absolutely.”