(1) REPORT. A responsible unit with an approved effective recycling program shall submit a report to the department under this section by April 30 of each year. For all measurements, a responsible unit shall use sampling methods or measurements specified by the department. The report shall demonstrate to the satisfaction of the department that the recycling program meets the requirements of this chapter and any conditions of the approved program. Reports shall be submitted on forms supplied by the department. Note: This form, or specific data formats for electronic submittal of the form, may be obtained from the Department of Natural Resources, Bureau of Waste Management at 101 S. Webster St., P.O. Box 7921, Madison, WI 53707.