Rensselaer's Dunn landfill may have to re-apply for permit next year DEC letter talks about re-applying rather than renewal of massive construction and demolition debris facility FacebookTwitterEmail A truck makes its way toward the SA Dunn landfill, near a sign protesting the facility which is in the middle of Rensselaer.Times Union file photo RENSSELAER - The controversial SA Dunn landfill will have to apply for what would essentially be a new permit rather than for a renewal of their existing permit to accept construction and demolition debris. That would be a more extensive process, with more scrutiny than a renewal.