Our office hours to receive assistance with your jury service are Monday through Friday from a.m. You may be excused from service on request if you: Are 75 years of age or older;; Have reported to court for jury service in the past 12 months.You may request to be excused from federal service. The court's normal hours of operation are AM to PM. Prospective jurors should make arrangements to remain the entire day. It's a simple form on the back. If you are currently employed, a written release verification from your employer. If you are contacted, please call the Jury Commissioner's office at 925-608-1000. Videos. Answering the Call for Jury Service. How do I get an expungement or record clearance, early termination, or felony reduction? Efficient jurors are men and women of sound judgment, absolute honesty, and a complete sense of fairness.