The production of synthetic natural gas, byproducts, beneficiated coal, or electrical power and data necessary to determine the amount of carbon dioxide captured must be measured at the place of production or generation, and any person subject to the imposition of the taxes provided by this chapter shall maintain devices to measure and record the cumulative periodic totals of synthetic natural gas, byproducts, beneficiated coal, and electrical power generated and data necessary to determine the amount of carbon dioxide captured. Any person subject to the taxes imposed by this chapter shall maintain accurate records of the daily and monthly totals of synthetic natural gas, beneficiated coal, and electrical power generated and subject to such taxes and data necessary to determine the amount of carbon dioxide captured. On or before October first of each year, the operator of any coal gasification plant shall file a report with the department of environmental quality listing the quantity of byproducts produced during the year ending June thirtieth of that year. The commissioner shall have access to such records at reasonable times and places.