Praxair is to present plans to build a hydrogen plant at the Richmond Chevron refinery in California. The development would allow the US giant to deliver gas to local refineries in Rodeo and Martinez.

The plant would carry gas from Richmond to the ConocoPhillips refinery in Rodeo and the Shell refinery in Martinez via underground pipelines. The pipelines would be laid through the cities of Richmond, Pinole, Hercules and Martinez and through East Bay Regional parklands in the Carquinez hills.

$quot;Hydrogen can be delivered by tanker trucks, pipelines and cylinders,$quot; said Susan Szita-Gore, communications director for Praxair Inc. $quot;Pipeline is one of the safest methods because instead of having 20 trucks on the roadway, it's delivered underground.$quot;

Praxair will give an overview of the project to the Contra Costa County Hazardous Materials Commission today in Concord. The project is in the early stages and not expected to reach the permitting stage until sometime next year.