SACRAMENTO, Calif. -- State workers who misused vehicles, received unentitled overtime pay and concealed private employment during work hours cost California hundreds of thousands of dollars this year, a new audit shows.

The report from the California state auditor shows the results of nine investigations that took place between January and June.

Some of the findings of improper conduct by state employees include:

A full-time employee of the Department of Housing and Community Development, who was also working at a nonprofit that gets grants from HCD, concealed her employment and was dishonest with her attendance. The abuses cost the state $34,687.

A California Environmental Protection Agency employee failed to punctually submit time sheets that accurately reported her absences. She was improperly paid $23,320 for the 768 hours that she was gone from work.

Two doctors who worked at San Quentin State Prison were paid $108,000 in overtime that they should not have received. The error was made by a clerk who entered incorrect payroll information.

A manager with the Department of Fish and Game regularly drove her child to school in a state-owned vehicle and misused state-compensated time of two subordinates by having them fix and build corrals for her private use at the state-owned property where she lives. These abuses cost the state $1,962.

The audit also reported that an Employment Development Department employee who was earlier found to have been drinking alcohol during work hours was disciplined with a two-day pay suspension.

The California Whistleblower Protection Act allows the Bureau of State Audits to investigates such cases.

California's prison medical system is now overseen by a court-appointed receiver. The receiver, Clark Kelso, said he is confident the overtime mistake will not happen again.