A new Web site has been launched to provide information about the changeover to ultra low-sulfur diesel.

The site, www.clean-diesel.org, is sponsored by the Clean Diesel Fuel Alliance, a cross-section of government agencies and groups representing the oil, engine and trucking industries.

Among other things, the site provides a breakdown of the deadlines for the rollout of ultra low-sulfur diesel, which are different for California than for the rest of the country.

The deadlines run as follows:

• Refiners and importers nationwide must ensure that at least 80 percent of the volume of the highway diesel fuel they produce or import is ULSD-compliant by June 1, 2006.
• Diesel fuel classified as ULSD must reach distribution and marketing points downstream from refineries (i.e., pipelines, distributors, terminals and transporters) by Sept.1, 2006 (July 15, 2006, in California).
• ULSD fuel requirements take effect at retail locations on Oct. 15, 2006 (Sept. 1, 2006, in California).
• Diesel fuel classified as low-sulfur diesel fuel may still be sold at retail locations outside of California between Oct. 15, 2006 and Dec. 1, 2010.