The van's driver, Jason Quinones, 42, of Daly City, was arrested and booked into Santa Clara County jail on suspicion of hit and run, DUI and manslaughter, all felonies.
Driving a 2001 Chevrolet Express 3500 that had been converted into a party van, Mr. Quinones lost control of the vehicle south of the Alpine Road interchange, drove off the road and struck a tree around 10:50 p.m., according to the CHP.
The van overturned about 20 feet from the freeway, killing Mr. Blomquist. The weather was clear and dry, and both men were wearing seat belts, the CHP said.
Mr. Quinones was found near the scene with minor injuries and was taken to Stanford Hospital for treatment. After determining that Mr. Quinones was the driver, the CHP arrested and booked him, CHP Officer Amanda Jack said.
The CHP has yet to confirm the company that owns the vehicle, she said.
Traffic was blocked on northbound I-280 for hours after the accident.
The CHP is investigating and asking anyone with information to call Officer Amanda Meier at (650) 369-6261.
— Bay City News Service