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               No. 23-1229

                 I n T3 e
  &uprente   Tourt of tle Vnitch 'tatiS

     ENVIRONMENTAL PROTECTION AGENCY,
                          Petitioner,

                   V.

 CALUMET SHREVEPORT REFINING, L.L.C., ET AL.,
                         Respondents.

         On Writ of Certiorari to the
United States Court of Appeals for the Fifth Circuit

BRIEF   OF NATSO,  SIGMA, AND  NACS AS
     AMICI  CURIAE  IN SUPPORT  OF
              PETITIONER

                       Hyland Hunt
                       Counsel of Record
                       Ruthanne M. Deutsch
                       DEUTSCH HUNT PLLC
                       300 New Jersey Ave. NW
                       Suite 300
                       Washington, DC 20001
                       (202) 868-6915
                       hhunt@deutschhunt.com