Highway 1 near Kruse Ranch Road in Salt Point State Park was limited to one-way traffic after a tanker truck overturned Tuesday afternoon.
The truck, owned by Evergreen Environmental Services, spilled several hundred gallons of used oil and antifreeze onto the roadway. The spill was contained to dirt and did not reach waterways, according to initial reports.
A hazardous materials team was sent to the site and Evergreen Environmental Services was expected to provide equipment to deal with the spill, according to the CHP.
The cab of the truck came loose from the trailer in the incident and two towing vehicles were needed to haul away the wreckage.
Traffic remained limited to one lane late Tuesday.
The driver, who was not identified, suffered minor injuries.