Cal. Pub. Cont. Code § 10240.2

A failure by the claimant to pursue diligently and exhaust, as to the claim, the required administrative procedures set forth in the contract under which the claim arose shall be a bar to arbitration hereunder until there has been compliance therewith. Subject to the preceding sentence, if more than 240 days have elapsed since acceptance of the work by the department, the claimant is entitled to arbitration, even though the procedures are not concluded.