A big-rig full of aluminum sulfate ended up on its side in Sunol on Wednesday afternoon.

The California Highway Patrol reported the 18-wheel, double tanker was stuck in a gully at Geary and Calaveras roads after its driver tried to navigate a sharp turn shortly after noon.

Alameda County fire officials initially reported that there may have been a leak from the big-rig but they later announced that the county hazardous materials team determined there was no dangerous fluid leaks. The initial fluid that leaked was coolant from the tractor.

Officials said the truck was headed to the Sunol Water Treatment Plant when the driver lost control. It landed about 100 yards from the nearby lake but didn’t pose a threat, even if it leaked, officials said.

No major injuries were reported and fire personnel said the big-rig driver was declining transport to a hospital.

Cheryl Hurd, the public affairs manager for the Alameda County Fire Department, said the big-rig is in an area that's hard to access for fire apparatus. She also said communication in the area is "spotty."

ACFD and California Highway Patrol along with two other units will remain on scene while a clean up company works to remove the fluids and the truck.

Officials said the clean up will take at least five to six hours and the road will remain closed until then.

Editor's note: Editor Cierra Bailey contributed to this report.