Each operator of a pressure maintenance or secondary recovery project shall keep records showing the volumes of fluid or fluids injected and produced and the injection pressures. Unless an alternative procedure is specified by the department, each operator shall submit to the department annually a statement showing the volumes of fluid or fluids injected and produced plus such other relevant data as may be required by the department, said statement to be provided to the department no later than March 1st of the succeeding year. If the operator so desires, the information contained in the statement will be held confidential for a period of one year except insofar as it may be used in statistical compilations wherein specific projects are not identified as such. Upon written request of the operator, and for good cause shown, the confidential period may be extended for one additional period of one year.