CA Civ Proc Code Section 1297.134

If a challenge following the procedure under Section 1297.133 is not successful, the challenging party may request the superior court, within 30 days after having received notice of the decision rejecting the challenge, to decide on the challenge. If a challenge is based upon the grounds set forth in Section 1297.121, and the superior court determines that the facts support a finding that such ground or grounds fairly exist, then the challenge should be sustained.