LYONDELL AND MILLENNIUM COMBINE OLEFINS AND POLYMERS BUSINESSES TO CREATE NEW $5 BILLION CHEMICAL COMPANY Jointly-Owned Venture Expected to Improve Annual Profitability by $150 Million and Reduce Effects of Industry Cyclicality on its Parent Companies Houston, TX, Iselin, NJ and London, England--July 28, 1997--Lyondell Petrochemical Company (NYSE:LYO)and Millennium Chemicals Inc. (NYSE:MCH) have signed a definitive agreement to form a new venture, with expected revenues of approximately $5 billion, comprised primarily of the olefins and polymers businesses of the two companies. The new company is expected to be the largest producer of ethylene and polyethylene in North America. It will consist of 13 manufacturing facilities on the U.S. Gulf Coast and in the U.S. Midwest, producing ethylene, propylene, polyethylene, polypropylene, ethyl alcohol and associated products. The combination will create a strong financial entity with book assets of approximately $5 billion. it plans to have $1.745 billion of debt, witha note receivable from Lyondell of $345 million, and substantial free cash flow. The new venture company, which will be operated as a partnership, will be owned 57% by Lyondell and 43% by Millennium. The venture's governance structure will include a six-person committee, co-chaired by Dan F. Smith, President and Chief Executive Officer of Lyondell, and William M. Landuyt, Chairman and Chief Executive Officer of Millennium. Smith also will serve as Chief Executive Officer of the venture company, which will be headquaretered in Houston, Texas. The Venture Creates Value Through Cost Reductions, Operating Efficiency Improvements and Broader Product Mix "We will create a new world class chemical company with enhanced asset utilization and a leading cost position across a broad line of products by blending assets, employees and operating capabilities from Millennium and Lyondell," said Dan F. Smith. "The extraordinary fit of these businesses will provide higher earnings power and create unique value that we expect will be differential in the industry." "The venture will have one of the broadest product lines in the industry, with extensive product development and research capabilities and the best employees from each organization, enabling it to better serve customers in rapidly growing markets," said William M. Landuyt. The partnership is expected to generate more than $150 million in annual pre-tax profit improvement. Substantial savings are expected to be realized early, with the full $150 million annual savings achieved by the end of 1999. Cost improvements will be achieved in such areas as eliminating duplicate overhead and staffing, improved purchasing capabilities, and better utilization of existing logistics and distribution channels. Efficiency improvements will include such items as greater use of feedstock flexibility, expanding the upgrade of co-products internally, sharing best business practices, and optimizing production scheduling of polymer plants. Customers will benefit from the greater supply flexibility gained through multiple olefins production sites and polymers customers will have access to significantly broader resin product lines. "This transaction is a major step in the execution of Lyondell's strategy to reduce cyclicality and grow the petrochemicals business through greater integration and a broader downstream product mix. It also advances our low cost strategy by compounding the benefits of recent cost reduction efforts and building a base for future improvements. Increased cash flow generated by this venture, as well as our interest in LYONDELL-CITGO Refining Company, will provide Lyondell with a greater number of cash allocation options to create shareholder value than ever before in our history," said Smith. Landuyt said, "This combination helps fulfill Millennium's strategy to maximize value creationin our polyethylene and related businesses by driving down costs and by partnering with an organization that shares our relentless focus on optimizing synergistic opportunities. The transaction also enhances Millennium's financial flexibility to pursue expansion of our specialties and intermediates businesses thereby reducing the volatility of Millennium's overall business portfolio." Closing Expected this Year The transaction, which has been unanimously approved by the Boards of Directors of both companies, is expected to close by year end, following approval by both companies' stockholders and satisfaction of certain other conditions. The Venture Will Be Comprised of Quality People, Assets & Operating Capabilities Lyondell's contribution to the new venture company includes the businesses associated with the following operations: The olefins business, comprised of two olefins plants at the Channelview Petrochemical Complex near Houston, TX, with annual capacities of 3.8 billion pounds of ethylene and 2.2 billion pounds of propylene, and related facilities for the manufacture and production of butadiene, aromatics and other co-products, as well as storage facilities at Mont Belview, TX. The polymers business, consisting of three manufacturing facilities located in Pasadena, Victoria and Matagorda County, TX, with annual capacities of 2 billion pounds of polymer resins. The technology group and certain business functions located in and near Houston. The venture will assume primary responsibility for $745 million of existing Lyondell company debt; Lyondell also will remain liable on this debt. In addition, Lyondell will provide a $345 million note payable to the venture. Not included in the venture are Lyondell's 58% interest in Lyondell-CITGO Refining, Ltd. (LCR) and its 75% interest in Lyondell Methanol (a joint venture with MCN Investment Corp.). Millennium's contribution to the new venture company includes the businesses associated with the following operations: The olefins business comprised of olefins plants at Clinton, IA, LaPorte, TX, and Morris, IL, with a total capacity of 3.8 billion pounds of ethylene. The polymers business comprised of 4.8 billion pounds of polymers capacity comprised of five manufacturing facilities in Clinton, IA; Morris, IL; LaPorte, Port Arthur and Chocolate Bayou, TX. The performance polymers business with manufacturing facilities in Tuscola, IL; Fairport Harbor and Heath, OH; and Crockett, TX. The synthetic ethanol and ethyl ether businesses with facilities at Tuscola, IL; Newark, NJ; and Anaheim, CA. Research and technology groups and a research center in Cincinnati, OH. See list of plants and capacities in Attachment I. Millennium will receive $1 billion from the exchange: The partnership will assume $750 million of Millennium's inter-copany debt, which will be repaid from the proceeds of new bank debt to be arranged by the partnership. In addition, Millennium will retain $250 million of accounts receivable form the contributed business. Not included in the venture are Millennium's interest in acetic acid, vinyl acetate and methanol assets and operations. Also excluded from the transaction are Millennium Inorganic Chemicals, Millennium Specialty Chemicals, and Millennium's equity interest in Suburban Propane Partners. Executive Management Team Announced for New Venture The venture company will be governed by an owners' committee comprised of representatives of Millennium and Lyondell. Members of the owners' committee will include: Dan F. Smith, President and CEO of Lyondell Petrochemical Company and CEO of the venture - Co-Chairman William M. Landuyt, Chairman and CEO of Millennium Chemicals Inc.- Co-Chairman Dr. Ronald H. Yocum, President and CEO of Millennium Petrochemicals Inc. - Member John E. Lushefski, Senior Vice President and CFO of Millennium Chemicals Inc. - Member Jeffrey R. Pendergraft, Senior Vice President, Chief Administrative Officer of Lyondell Petrochemical Company - Member Clifton B. Currin, Jr., Vice President, Corporate Development of Lyondell Petrochemical Company - Member The members of the executive management team of the venture company include: Eugene R. Allspach, President and Chief Operating Officer Joseph M. Putz, Senior Vice President, Finance and Administration Debra L. Starnes, Senior Vice President, Polyolefins John R. Beard, Vice President, Manufacturing J. R. Fontenot, Vice President, Engineering Alan Houlton, Vice President, Customer Services Gerald A. O'Brien, Vice President, Secretary Myra J. Perkinson, Vice President, Human Resources W. Norman Phillips, Jr., Vice President, Olefins Kerry F. Williams, Vice President, Research and Development Jeffrey L. Hemmer, Director, Business Process Improvement Lyondell Petrochemical Company (web site: www.lyondell.com) is a major commodity petrochemical and polymers company with headquarters in Houston, TX. The company manufactures and markets olefins (primarily ethylene, propylene, butadiene, butylenes and specialty products), aromatics, methanol and MTBE, and polymers (or polyolefins), including high-density polyethylene, polypropylene and low-density polyethylene. Lyondell is involved in petroleum refining through its 58% participation interest in LYONDELL-CITGO Refining Company Ltd (LCR), which produces refined petroleum products, including gasoline, low sulfur diesel and jet fuel. Lyondell operates a methanol business, in which it has a 75% ownership interest. Millennium Chemicals Inc. (web site: www.millenniumchem.com) is a major international chemical company, with leading market positions in a broad range of commodity, industrial, performance and specialty chemicals. Millennium Chemicals was formed as a result of a spin-off from Hanson PLC, a UK public company, on October 1, 1996. Millennium Chemicals Inc. is the largest producer of polyethylene products in the United States; the second largest producer of titanium dioxide (TiO2 ) in the United States and the third-largest in the world; the second largest producer of acetic acid and vinyl acetate monomer in the United States; a leading producer of high value-added performance polymers, color concentrates and polymeric powders and other products, including titanium tetrachloride, cadmium/selenium pigments and silica gel; and a leading producer of fragrance and flavor chemicals. The statements in this release relating to matters that are not historical facts are forward-looking statements that involve risks and uncertainties, including, but not limited to, future global economic conditions, production capacity, competitive products and prices and other risks and uncertainties detailed in the companies' Securities and Exchange Commission filings. For inquiries, please call: Lyondell Millennium Chemicals Media: Jackie Wilson (713) 652-4596 or Investors and Media: David Harpole (713) 652-4125 Mickey Foster (732) 603-6777 Investors: Kevin DeNicola (713) 652-4590 MANUFACTURING OPERATIONS OF THE VENTURE Location Principal products Annual capacity Channelview, Texas Ethylene 3.8 billion pounds Propylene 2.2 billion pounds Butadiene 615 million pounds Benzene 90 million gallons Toluene 40 million gallons Dicyclopentadiene (DCPD) 80 million pounds Isoprene 108 million pounds Resin oil 120 million pounds Piperylenes 100 million pounds Alkylate 22,000 barrels per day MTBE 13,000 barrels per day Chocolate Bayou, Texas High -density polyethylene 400 million pounds Crockett, Texas Wire & cable compounds, color 120 million pounds and additive concentrates LaPorte, Texas Ethylene 1.74 billion pounds Low-density polyethylene 395 million pounds Linear-low density polyethylene 480 million pounds High-density polyethylene 545 million pounds Matagorda County, Texas High-density polyethylene 1,050 million pounds Pasadena, Texas (Bayport plant) Polypropylene 400 million pounds Low-density polyethylene 140 million pounds Port Arthur, Texas Low-density polyethylene 190 million pounds High-density polyethylene 540 million pounds Victoria, Texas High-density polyethylene 450 million pounds Morris, Illinois Ethylene 1.13 billion pounds Low-density polyethylene 540 million pounds Linear low density polyethylene 650 million pounds Polypropylene 280 million pounds Tuscola, Illinois Ethyl alcohol 50 million gallons Diethyl ether 5 million gallons Compounds for wire & cable 36 million pounds Microfine polyolefin powders 10 million pounds Clinton, Iowa Ethylene 960 million pounds Low-density polyethylene 430 million pounds High-density polyethylene 450 million pounds Fairport Harbor, Ohio Wire & cable compounds, color 60 million pounds concentrates Heath, Ohio Color, additive and foam 39 million pounds concentrates, performance compounds