Oil and Natural Gas Exploration and Production Waste Management Improvement Act of 1991

[AI summary unavailable — showing source text] Oil and Natural Gas Exploration and Production Waste Management Improvement Act of 1991 - Amends the Solid Waste Disposal Act to make wastes associated with the exploration, development, or production of crude oil or natural gas subject to hazardous waste management requirements effective January 1, 1994. Exempts wastes from the exploration, development, and production of geothermal energy from such requirements unless the Administrator of the Environmental Protection Agency determines that regulation of such wastes is necessary to protect human health and the environment. Directs the Administrator to promulgate changes to the toxicity characteristic leaching procedure to ensure that it accurately predicts the leaching potential of wastes containing significant concentrations of oil or grease. Bans the use of produced water for dust suppression or road treatment. Defines "produced water" as water brought up from the hydrocarbon strata during the extraction of oil and gas that may include formation or injection water and any chemicals added downhole or during the oil-water separation process. Applies requirements regarding State hazardous waste management programs to programs for pr…