Your search Kennecott Copper Corporation, Petitioner, v. Environmental Protection Agency, Respondent.hecla Mining Company, Petitioner, v. Environmental Protection Agency, Respondent.homestake Mining Company, et al., Petitioners, v. Environmental Protection Agency, Respondent.gulf & Western Industries, Inc., Petitioner, v. Douglas M. Costle, Administrator, Epa, Respondent.ranchers Exploration and Development Corporation, a Newmexico Corporation, Petitioner, v. United States Environmental Protection Agency, Respondent did not match any document.