Sixty two acres of what used to be polluted McClellan Air Force Base soil has now been certified clean and ready for use by new businesses.  Larry Kelley is president of McClellan Business Park. 

KELLEY: "The method that was used was a thermal absorbsion unit. It's a low-temperature heating process that heats the dirt.  The advantage of that is it allows you to put the dirt back in the hole you excavated it out of.  So you don't take contaminated dirt to a landfill and then go get clean dirt and bring it in."

The project cost about $11 million.  A company called Tetra Tech did the work.  The United States Air Force paid for the cleanup.  It  operated the base for 65 years until closing it a decade ago.   Kelley says U.S. Foods has already agreed to build a campus on 35 acres of the recently rehabilitated land.