The court, upon the petition of the board, shall enter an order directing the witness to appear before the court at a time and place fixed by the court in the order and not more than 10 days from the date of the order, and then and there show cause, if any he have, why he refused to obey the subpena, or refused to answer questions propounded to him by the board, or neglected, failed, or refused to produce before the board the evidence called for in the subpena.
Ca. Water Code § 1094