The amount so posted shall be forfeited to the municipality if the bidder does not, within 15 days after written notice that the contract has been awarded to the bidder, enter into a contract with the municipality for the work. Upon an award to the lowest bidder, the security of an unsuccessful bidder shall be returned in a reasonable period of time, but in no event shall that security be held by the legislative body beyond 60 days from the time the award is made.
Ca. Pub. Cont. Code § 20483