The spill was reported at 6:30 a.m. inside the tunnel. Initial reports indicated that a layer of sand was covering all of the eastbound lanes.
However, CHP Officer Scott Cakebread said around 7:45 a.m. that the spill was only affecting the three right lanes.
Sweepers were called in for cleanup, and the lanes reopened around 8 a.m.
The truck that spilled the sand did not stop, and it is unclear whether the driver knew about the spill, Cakebread said.
