No. 94 CA 1148. June 26, 1996. APPEAL FROM DEPARTMENT OF ENVIRONMENTAL QUALITY, STATE OF LOUISIANA. Daria B. Diaz, Tulane Environmental Law Clinic, New Orleans, for appellants, Sierra Club — Delta Chapter, Louisiana Environmental Action Network and the Town of Sterlington. Meredith Hoag Lieux and James B. Thompson, III, Baton Rouge, for appellee, Louisiana Department of Environmental Quality. Maureen N. Harbourt, Baton Rouge, for appellee, Angus Chemical Company. Before WATKINS, CARTER, LeBLANC,