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By E. Lynn Grayson
EPA recently proposed to exempt 600 tons of wastewater treatment sludge filter cake from regulation as a RCRA hazardous waste. 79 FR 49253 (August 20, 2014). EPA's action follows John Deere's filing of a delisting petition on January 28, 2014 seeking to exempt these F006/F019 wastes generated at the John Deere Des Moines Works in Ankeny, Iowa.
John Deere (through its consultant) petitioned EPA to exclude from the list of hazardous wastes contained in 40 CFR 261.31, F006/F019 Waste Water Treatment Sludge Filter Cake from dewatering sludge generated by the plant wastewater treatment facility. The filter cake is subject to two waste listings as it is the result of treating a mixture of wastewater from different manufacturing processes.
The petitioned waste does not meet the criteria for which F006 was listed (i.e., cadmium, hexavalent chromium, nickel, cyanide (complexed)) or for which F019 was listed (i.e., hexavalent chromium, cyanide (complexed)) and that there are no other factors which would cause the waste to be hazardous. Specifically, the petition request is for a standard exclusion for 600 tons per calendar year of filter cake.
If approved, these wastes would be conditionally excluded from RCRA hazardous waste regulations. Even if delisted, the sludge would be disposed of at a RCRA Subtitle D landfill permitted by Iowa Department of Natural Resources to manage industrial solid wastes.
EPA is accepting comments on this proposed action until September 19, 2014.