united-states-v-vertac-chemical-corporation-hercules-incorporated , 46 F.3d 803 ( 1995 )
united-states-of-america-arkansas-department-of-pollution-control-and , 247 F.3d 706 ( 2001 )
United States v. Hercules , 247 F.3d 706 ( 2001 )
United States v. Hercules, Inc. , 453 F.3d 1031 ( 2006 )
united-states-of-america-arkansas-department-of-pollution-control-and , 453 F.3d 1031 ( 2006 )