Some truck drivers in Santa Maria were met with surprise inspections on Tuesday.
The California Air Resources Board set up a checkpoint on West Main Street where trucks were stopped and inspected for compliance with state air pollution laws.
Inspectors checked the diesel emissions as well as the refrigeration units that keep the produce cool.
"We’ve had some complaints in the area there are a number of folks who are running old (refrigeration units) on their trucks, and we would look at that anyway, but that’s one of the reasons we are in this particular area today," said Bruce Tuter, Air Resources Supervisor for the California Air Resources Board.
Drivers found to be breaking the law could be issued a citation for noncompliance and fined up to $1,000 per day.
Air Resources officials say they inspect as many as 50 trucks per day at each of their checkpoints.