
    No. 83-1013.
    No. 83-1373.
    Chemical Manufacturers Assn. et al. v. Natural Resources Defense Council, Inc., et al.; and United States Environmental Protection Agency v. Natural Resources Defense Council, Inc., et al.
   C. A. 3d Cir. [Certiorari granted, 466 U. S. 957.] Motion of Chamber of Commerce of the United States for leave to file a brief as amicus curiae granted.  