Mealey's (May 12, 2021, 1:15 PM EDT) -- NEW ORLEANS — The federal government tells the Fifth Circuit U.S. Court Appeals in a brief filed May 10 that a ruling ordering it to contribute $16.1 million toward Exxon Mobil Corp.’s remediation of a Baytown, Texas, refinery the company used for the production of aviation gas (avgas) should be overturned because the claim was barred by the Comprehensive Environmental Response, Compensation, and Liability Act’s three-year statute of limitations....