
    No. 75-324.
    No. 75-325.
    No. 75-326.
    Exxon Corp. et al. v. Environmental Protection Agency; Texas Chemical Council v. Environmental Protection Agency; and Harris County, Texas v. Environmental Protection Agency.
   C. A. 5th Cir. Certiorari denied.

Mr. Justice Powell took no part in the consideration or decision of these petitions.

Reported below: 499 F. 2d 289.  