Cal. Pub. Cont. Code § 10345
(a) Whenever a contract is awarded under a procedure providing for competitive bidding, but the contract is not to be awarded to the low bidder, the low bidder shall be given notice five working days prior to the award of the contract by telegram, electronic facsimile transmission, overnight courier, Internet transmission, or personal delivery.
(b) Contracts awarded under the provisions of Section 10344 shall be awarded only after a notice of the proposed award has been posted in a place accessible by the general public, including any Internet site identified in the request for proposal, for five working days.
(2) Within five days after filing the protest, the protesting bidder shall file with the department and awarding state agency a full and complete written statement specifying the grounds for the protest. Protests shall be limited to the following grounds: