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been no known examples of harm from spreading sludge properly.
Mr. Faha said the state regulations are designed to insure that there are “no effects on state waters from this activity.” He said when they receive an application to land apply sludge, the Health Department makes a site visit and sets restrictions on how sludge may be applied at that farm.
Dr. Sawyer said the permit will specify where it can and can’t go. The applicator submits monthly reports, he said. He said the permit is “self-policing. It does the company no good to be in noncompliance. It’s clear on inspection if the buffer zones have been violated.”
He said the state developed its permitting process at the request of counties that had farms in which sludge had been piled up. Even on those farms, he said, there were no problems from runoff of from heavy metals.
Prof. Evnylo said, “In my opinion there are great agricultural benefits... The slow release of nitrogen is less of a hazard than chemical fertilizers...Research (shows) the benefits outweighs the risks posed to the environment and public health.”
On the other hand Prof. Tackett said because of potential hazards, particularly from lead, the county should ban sludge. He noted that the EPA sets standards for levels of lead in sludge, but there is no known level of lead that is safe for children. He noted that the EPA has banned lead in gasoline, paint and other products but new regulations allow
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