SAN RAMON, CA- ChevronTexaco Corp. today announced that its proprietary system for estimating and managing greenhouse gas emissions and energy utilization data is now available free of charge to the worldwide energy industry. The company is releasing the system to promote standardization of methodologies used and comparability in gathering of greenhouse gas inventory information.

The system, called the SANGEA™ Energy and Emissions Estimating System 2.0, is an automated, electronic data management information system designed to gather greenhouse gas emissions and energy usage data from exploration and production, refining and marketing, petrochemicals, transportation, electricity generation, manufacturing, real estate and coal activities.

"Making our greenhouse gas emissions estimating system available publicly demonstrates our commitment to addressing the important issue of global climate change," said ChevronTexaco Chairman and CEO Dave O'Reilly. "We believe it is essential to have the ability to measure and calculate industry data consistently on a global basis."

ChevronTexaco believes the system is unique because it enables facilities to set up reports, enter monthly data, review results and to revise the report setup as operations change. Furthermore, data can be sent automatically to management for review on a quarterly basis.

Auditability is a key feature of the system, which has been designed to take into consideration established auditing principles. Users are prompted to enter audit trail information along with input data. Additionally, the system is able to track time, date and user of entries and changes, and requires documentation of changes made after the original data is submitted.

The SANGEA™ Emissions Estimating System combines energy use management with greenhouse gas emissions estimating. Combining the greenhouse gas management system with the energy management system is more efficient for the user and ensures consistent energy utilization and greenhouse gas emission data for a facility.

ChevronTexaco has used the SANGEA™ Emissions Estimating System successfully since January 2002. The company began developing an improved reporting system in January 2001 because its assessment determined that there were no comprehensive systems on the market to effectively monitor and measure energy utilization and greenhouse gas emissions across an organization's various activities.

The calculation methods and emission factors of the SANGEA™ system are based on the American Petroleum Institute's Compendium of Greenhouse Gas Emissions Estimation Methodologies for the Oil and Gas Industry, which ChevronTexaco considers to be one of the best practices for the petroleum industry.

Based in San Ramon, Calif., ChevronTexaco is the second-largest U.S.-based energy company and the fifth largest in the world, based on market capitalization. More than 53,000 ChevronTexaco employees work in approximately 180 countries around the world, producing oil and natural gas and marketing fuels and other energy products.

Note to Editors: SANGEA™ is a trademark of ChevronTexaco Corporation.

Chevron Corporation: OLD DO NOT USE

Chevron Corporation: OLD DO NOT USE

Chevron Corporation provides administrative, financial, management and technology support to U.S. and international subsidiaries that engage in the operation of petroleum, chemicals, mining, power generation and energy services.