 He had pointed out at a January 4, 1979, EPA public hearing that state scientists had misrepresented the depths of soil sample testing they had conducted at the site.At Mulchi's insistence, the state added a plastic top liner to the landfill.According to detoxification expert, Dr. Joel Hirshhorn, who represented Warren County citizens as they pressed Governor Hunt and the North Carolina General Assembly for funding for a cleanup, the Warren county PCB landfill was an utter failure that should never have been approved by the EPA.