
    No. 75-1602.
    No. 75-1612.
    No. 75-1613.
    No. 75-1614.
    E. I. du Pont de Nemours & Co. et al. v. Environmental Protection Agency; Ethyl Corp. v. Environmental Protection Agency; Nalco Chemical Co. v. Environmental Protection Agency; and National Petroleum Refiners Assn. v. Environmental Protection Agency.
   C. A. D. C. Cir. Motion of Pacific Legal Foundation for leave to file a brief as amicus curiae denied. Certiorari denied.

Mr. Justice Powell took no part in the consideration or decision of this motion and petitions.

Reported below: 176 U. S. App. D. C. 373, 541 F. 2d 1.  