SYNOPSIS OF CASE ST. JOE RESOURCES COMPANY IS A BRANCH AND THE OPERATING COMPANY FOR THE ZINC MINING AND SMELTING ACTIVITIES OF ST. JOE MINERALS CORPORATION. ST. JOE RESOURCES IS ONE OF TEN ZINC MINING AND FIVE ZINC SMELTING COMPANIES REMAINING IN THE UNITED STATES. THE COMPANY'S MINE IS LOCATED IN BALMAT, NEW YORK AND ITS SMELTER IS LOCATED IN MONACA, PENNSYLVANIA. IN 1979 ST. JOE RESOURCES PRODUCED 143,000 TONS OF ZINC METAL AND WAS THE LARGEST PRODUCER OF ZINC METAL IN THE COUNTRY. THE SMELTER WAS CLOSED IN DECEMBER, 1979 AND WAS STARTED UP AGAIN IN AUGUST, 1980, AND FOR THE YEAR 1982 PRODUCED 75,000 TONS OF ZINC METAL, ZINC OXIDE AND ZINC DUST. THE MONACA, PENNSYLVANIA SMELTER IS LOCATED ON A SITE BORDERING THE OHIO RIVER IN WESTERN PENNSYLVANIA, APPROXI- MATELY 30 MILES NORTH OF PITTSBURGH. POWER FOR THE SMELTER IS PROVIDED BY THE COMPANY'S OWN GENERATING STATION CALLED THE GEORGE F. WEATON GENERATING STATION. THE STATION IS A 100-MEGAWATT STEAM ELECTRIC GENERATING STATION CONSISTING OF TWO IDENTICAL BOILERS WHICH ARE THE SUBJECT OF THE RE- PORT AND ARE DESIGNATED AS UNITS NO. 1 AND NO. 2. THE PUL- VERIZED COAL USED TO FIRE THESE BOILERS IS THE SOURCE OF THE RESULTANT SULFUR DIOXIDE ( S02 ) EMISSIONS. THE EXCESS POWER FROM THE STATION, APPROXIMATELY 63%, IS SOLD TO A LOCAL UTILITY, DUQUESNE LIGHT.