West Virginia Code Chapter 22. Environmental Resources § 22-8-10. Statements of amount of oil

All amounts in the statements required by this article, when the petroleum is handled in bulk, shall be given in barrels and hundredths of barrels, reckoning forty-two gallons to each barrel, and when such petroleum is handled in barrels or packages, the number of such barrels or packages shall be given, and such statements shall distinguish between crude and refined petroleum, and give the amount of each. Every company engaged in the business aforesaid shall at all times have in their pipes and tanks an amount of merchantable oil equal to the aggregate of outstanding receipts, certificates, accepted orders, vouchers, acknowledgments, evidences of liability, and credit balances, on the books thereof.