ELR Citation: ELR 20393
No(s). 297 C.D (Pa. Commw. Ct. Jul 9, 1971)

Air Pollution Commission's abatement order cannot stand where hearing examiner's finding that petitioner's coke ovens violated state air pollution standards was based upon visual observations of expert witness unaided by Ringelmann Smoke Chart or other available scientific methods for determining sm...