Bid security is required for construction bids.
PCC 20111(b). The governing board shall let any contract for a public project, as defined in subdivision (c) of Section 22002, involving an expenditure of fifteen thousand dollars ($15,000) or more, to the lowest responsible bidder who shall give security as the board requires, or else reject all bids. All bids for construction work shall be presented under sealed cover and shall be accompanied by one of the following forms of bidder’s security:
(2) A cashier’s check made payable to the school district.
(3) A certified check made payable to the school district.
(4) A bidder’s bond executed by an admitted surety insurer, made payable to the school district. 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 school district beyond 60 days from the time the award is made.