CPN Calpine Corp.

SAN JOSE, Calif., Sept. 12 /PRNewswire-FirstCall/ -- Calpine Corporation's (NYSE:CPN) Dighton Power Plant in Dighton, Massachusetts has been designated as a Star Worksite under the Voluntary Protection Program (VPP) administered by the U.S. Department of Labor's Occupational Safety and Health Administration (OSHA). Star certification under the VPP program is OSHA's highest level of recognition of outstanding efforts by an employer and its employees to achieve exemplary occupational safety and health at their worksites. "Dighton is now the third plant in Calpine's fleet to achieve OSHA Star status," said Calpine Dighton Plant Manager Michael Joyce. "This achievement reflects a great deal of hard work by our local personnel as well as a strong commitment to safety at every level of the Corporation." OSHA's Voluntary Protection Programs (VPPs) are designed to promote effective worksite-based safety and health. Under the VPP, management, labor, and OSHA establish cooperative relationships at workplaces that have implemented a comprehensive safety and health management system. OSHA's verification includes an application review and a rigorous onsite evaluation by a team of OSHA safety and health experts. According to Kyle Dotson, Calpine Vice President and Corporate Safety Officer, "Calpine operates one of the largest fleets of power plants in the U.S., and we are committed to attaining the highest possible standards in all aspects of plant operations, including health and safety, environmental compliance, reliability and profitability. This recognition by OSHA demonstrates that we are succeeding in our efforts to design, build and operate healthy and safe power plants to meet America's energy needs, and we applaud our employees for their commitment to operational excellence." About Calpine A major power company, Calpine Corporation supplies customers and communities with electricity from clean, efficient, natural gas-fired and geothermal power plants. Calpine owns, leases and operates integrated systems of plants in 21 U.S. states and three Canadian provinces. Its customized products and services include wholesale and retail electricity, natural gas, gas turbine components and services, energy management, and a wide range of power plant engineering, construction and operations services. Calpine was founded in 1984. It is included in the S&P 500 Index and is publicly traded on the New York Stock Exchange under the symbol CPN. For more information, visit http://www.calpine.com/ . This news release discusses certain matters that may be considered "forward-looking" statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including statements regarding the intent, belief or current expectations of Calpine Corporation ("the Company") and its management. Prospective investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve a number of risks and uncertainties that could materially affect actual results such as, but not limited to, (i) the timing and extent of deregulation of energy markets and the rules and regulations adopted on a transitional basis with respect thereto; (ii) the timing and extent of changes in commodity prices for energy, particularly natural gas and electricity; (iii) unscheduled outages of operating plants; (v) a competitor's development of lower cost generating gas-fired power plants; (iv) risks associated with marketing and selling power from power plants in the newly-competitive energy market; and (v) other risks identified from time-to-time in the Company's reports and registration statements filed with the SEC, including the risk factors identified in its Annual Report on Form 10-K for the year ended December 31, 2004 and in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2005, which can also be found on the Company's website at http://www.calpine.com/. All information set forth in this news release is as of today's date, and the Company undertakes no duty to update this information. DATASOURCE: Calpine Corporation CONTACT: media, Katherine Potter, +1-408-792-1168, or investors, Karen Bunton, +1-408-995-5115, ext. 1121, both of Calpine Corporation Web site: http://www.calpine.com/

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