The EPA (also, "the Agency" or "we" in this preamble) is granting petitions to exclude (or "delist") wastewater treatment plant sludge from conversion coating on aluminum generated by six automobile assembly facilities in the State of Michigan from the list of hazardous wastes. The facilities include three plants owned and operated by General Motors Corporation (GM) (Pontiac East-Pontiac, Hamtramck-Detroit, Flint Truck-Flint), one plant owned and operated by GM with an onsite wastewater treatment plant owned by the City of Lansing and operated by Trigen/Cinergy-USFOS of Lansing LLC (Lansing Grand River-Lansing), and two plants owned and operated by Ford Motor Company (Wixom Assembly Plant-Wixom, Michigan Truck/Wayne Integrated Stamping and Assembly Plant-Wayne). Today's action conditionally excludes the petitioned wastes from the requirements of hazardous waste regulations under the Resource Conservation and Recovery Act (RCRA) when disposed of in a lined Subtitle D landfill which is permitted, licensed, or registered by a State to manage industrial solid waste. The exclusions were proposed on March 7, 2002 as part of an expedited process to evaluate these wastes under a pilot project developed with the Michigan Department of Environmental Quality (MDEQ). The rule also imposes testing conditions for wastes generated in the future to ensure that these wastes continue to qualify for delisting.