Environmental Protection Agency (EPA) is granting a petition submitted by WRB Refining, LLC Company to exclude (or delist) the sludge from its wastewater treatment plant generated by WRB Refining, LLC Company in Borger, Texas from the lists of hazardous wastes. This direct final rule responds to the petition submitted by WRB Refining, LLC Company to delist the thermal desorber residual solids with Hazardous Waste Numbers: F037, F038, K048, K049, K050, and K051. After careful analysis and use of the Delisting Risk Assessment Software (DRAS), EPA has concluded the petitioned waste is not hazardous waste. This exclusion applies to 5,000 cubic yards per year of the thermal desorber residual solids with Hazardous Waste Numbers: F037, F038, K048, K049, K050, and K051. Accordingly, this final rule excludes the petitioned waste from the requirements of hazardous waste regulations under the Resource Conservation and Recovery Act (RCRA) when it is disposed in a Subtitle D Landfill.