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POWER PLANT BRINGS INNOVATIVE GAS/COAL COFIRED UNIT ON LINE

 POWER PLANT BRINGS INNOVATIVE GAS/COAL COFIRED UNIT ON LINE
 NEWBURGH, Ind., Aug. 17 /PRNewswire/ -- Alcoa Generating Corp. has begun cofiring one of its power generating units with a combination of natural gas and coal as part of an innovative project to reduce air emissions and increase plant efficiency.
 AGC is a wholly-owned subsidiary of the Pittsburgh-based Aluminum Company of America (NYSE: AA). AGC supplies power to Alcoa's Warrick Operations, one of the world's largest aluminum smelting and fabricating facilities. Natural gas transmission company Tenneco Gas provided funding assistance for the project.
 "This creative use of cofiring allows us to reduce emissions cost- effectively and run our power plant more efficiently," said Phil Fassett, AGC manager of business analysis. "That's an important competitive advantage in an industry where power is one of the major costs of production."
 Tenneco Gas provided funds to adapt for cofiring Unit 1 of the AGC power plant. Unit 1 is a 144-megawatt boiler. In exchange, Alcoa will transport gas on the Tenneco Gas pipeline system to fuel the power plant's new cofiring system and to supplement existing natural gas needs at its adjacent manufacturing facility.
 "The Warrick plant is a perfect example of the important role natural gas can play in clean air compliance," Joe Ramsey, Tenneco Gas senior vice president of business development, said today. "Alcoa's innovative use of cofiring showcases the diversity of natural gas applications as well as its many environmental, economic and operational benefits. This is important as electric generating plants across the country plan how to meet the reduced emissions standards set by the Clean Air Act Amendments of 1990."
 Because natural gas contains no sulfur, cofiring -- or burning it along with coal in the primary combustion area of a boiler -- will reduce the sulfur dioxide (SO2) emissions that contribute to acid rain.
 The Warrick plant had previously served as a cofiring test site under a program administered by the Gas Research Institute.
 "We had experience with cofiring through the research and knew the process would work," Fassett said. "It also was a cost-effective way to meet emissions standards while continuing to burn local Indiana coal. Other clean air options would have been prohibitively expensive or required using more out-of-state, low-sulfur supplies."
 The cofiring process offers operational advantages as well. Using natural gas and coal together can significantly reduce slagging, the buildup of deposits on boiler walls, and thus improve efficiency. Natural gas also contains no ash.
 Alcoa plans to retrofit its second unit for cofiring by 1993 and to complete adapting all four units by 1995. The plant has a total generating capacity of 732 megawatts.
 Tenneco Gas operates a network of more than 19,000 miles of pipelines moving 14 percent of the nation's gas supply. With many of the 110 power plants targeted for 1995 Phase I clean air compliance easily accessible by its pipelines, the company has long been active in developing innovative approaches to natural gas as a compliance strategy. Tenneco Gas is a division of Tenneco Inc. (NYSE: TGT), a diversified industrial corporation with other major business interests in farm and construction equipment, shipbuilding, automotive parts, packaging and chemicals.
 Alcoa is a worldwide company with 159 operating and sales locations in 22 countries serving a broad range of markets in developing and industrialized economies. Alcoa's products are used in beverage containers, airplanes and autos, commercial and residential buildings, chemicals and a wide array of consumer and industrial applications.
 -0- 8/17/92
 /NOTE TO EDITORS: Photo of power plant available via Wieck Photo DataBase to any newspaper or media outlet with telephoto receiver or electronic darkroom that can accept overhead transmissions. To electronically retrieve photo, call 214-416-3686/
 /CONTACT: Megan Mastal of Tenneco Gas, 713-757-2742; or Mike Belwood of Alcoa, 812-853-1695/
 (TGT AA) CO: Tenneco Inc.; Alcoa Generating Corp. ST: Texas, Indiana IN: MNG SU:


GK -- NY041 -- 0482 08/17/92 11:49 EDT
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Date:Aug 17, 1992
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