Two people were uninjured when their single-engine airplane landed short of Tracy Municipal Airport on Saturday evening.
According to Tracy police records, officers were alerted to the emergency landing at 6:53 p.m.
The pilot set the plane down on property owned by Cemex, a cement and concrete manufacturing company at 30350 S. Tracy Blvd., about a half-mile from the airport.
According to a statement from Ian Gregor, a communications manager for the Federal Aviation Administration, the airplane was a 2005 Evektor SportStar registered out of Auburn.
The preliminary investigation said the airplane had taken off from the San Martin airport, a mile east of San Martin in Santa Clara County, and was headed to the Tracy Airport.
Gregor said the pilot reported that he ran out of fuel and set the aircraft down short of the runway.
The pilot and his passenger, who were not identified, were able to exit the airplane and were not injured.
The FAA and the National Transportation Safety Board will investigate what happened, with the NTSB as the lead agency. Gregor said it could take up to a year or more to complete the investigation.