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<br />() f... , ., J <br />1.J.......1.', I <br /> <br />Sulfur Dioxide Removal <br /> <br />S02 has been recognized as one of the more critical effluents of <br /> <br />coal- burning powerplants. studies are underway by Utah Power & Light <br /> <br />. <br /> <br />Company and its consultants to analyze S02 removal equipment that could <br /> <br /> <br />be the most feasible for this plant and capable of meeting Federal and <br /> <br />State S02 standards. <br /> <br />The Company officials do not feel that S02 removal processes or <br /> <br />equipment have yet been developed to a point where they would be jus- <br /> <br />tified in making a commitment on a specific removal system in time to <br /> <br />permit installation in the first 430-mw unit scheduled to go on line in <br /> <br />1974. The .Company plans to leave adequate space in the plant design to <br /> <br />allow installation of 802 removal equipment in the future. <br /> <br />In this connection, the Air Pollution Control Office of EPA has <br /> <br />stated in a letter, dated November 4, 1970, '~echnical staff in our <br /> <br />Bureau of Abatement and Control feels that about 90 per cent reduction <br /> <br />sulfur oxide emissions is commercially feasible now." This statement, <br /> <br />however, is not supported by other studies that have been conducted, <br /> <br />such as that of the Committee on Air Quality Management of the National <br /> <br />Academy of Science and the National Academy of Engineers, which found, <br /> <br />in September 1969, that no 802 removal process had been developed and <br /> <br />proven commercially in an operating powerplant. This latter <br /> <br />finding appears to be supported by experience in the few cases of large <br /> <br />operating plants that have installed S02 removal equipment to date. The <br /> <br /> <br />low-sulfur content coal to be used in this plant imposes additional <br /> <br />problems of efficient removal on which very little research has been <br /> <br />performed. <br /> <br />19 <br />