 10/17/2006 | RCRA-08-2007-0001 | KATZON BROTHERS, INC. | RCRA |
| 02/08/2007 | TSCA-08-2007-0002 | TYLER THEOBALD | TSCA |
| 06/05/2007 | CWA-08-2007-0010 | ROHRER FAMILY LIMITED PARTNERSHIP; DOUGLAS AND KEN ROHRER | CWA |
| 06/07/2007 | CERCLA-08-2007-0008 | ANACONDA SMELTER SUPERFUND SITE, REGIONAL WATER, WASTE, AND SOILS OPERABLE UNIT, SOUTH OPPORTUNITY UPLANDS REMEDIAL DESIGN UNIT, ATLANTIC RICHFIELD CO. | CERCLA |
| 07/17/2007 | TSCA-08-2007-0003 | THOMAS LAHTI | TSCA |
| 08/28/2007 | TSCA-08-2007-0004 | SANFORD K. METZEL
S.K.M. MANAGEMENT CO. | TSCA |
| 09/04/2007 | CWA-08-2007-0017 | BOB AND TRACI BURLESON and WAYNE HERLING | CWA |
| 09/17/2007 | CERCLA-08-2007-0012 | LIBBY ASBESTOS SITE, OU3
W. R. GRACE AND CO.; KOOTENAI DEVELOPMENT CO. | CERCLA 122(h) |
| 01/17/2008 | CWA-08-2008-0005 | HOMELAND GAS & OIL LTD., INC.
UTE TRIBAL 1-31C5 | CWA |
| 01/17/2008 | CWA-08-2008-0006 | HOMELAND GAS & OIL LTD., INC. - UTE TRIBAL 1-31C5 | CWA |
| 01/17/2008 | CWA-08-2008-0007 | HOMELAND GAS & OIL LTD., INC. - UTE TRIBAL 1-34B (Z2) | CWA |
| 04/10/2008 | TSCA(LEAD)-08-2008-0001 | MR. ALVIN DUFFERT, OWNER - ALVIN DUFFERT RENTAL PROPERTIES | TSCA |
| 04/16/2008 | TSCA-08-2008-0002 | MR. PAUL MORIARTY | TSCA |
| 04/16/2008 | TSCA-08-2008-0003 | MR. BILL STUART | TSCA |
| 05/12/2008 | TSCA-08-2008-0004 | TYLER THEOBALD | TSCA |
| 06/04/2008 | TSCA(SUB)-08-2008-0005 | TODD RAGAN, RESIDENT MANAGEMENT SYSTEMS (RMS) | TSCA |
| 06/04/2008 | TSCA(SUB)-08-2008-0006 | MS. JANE MARIE BUDIMIR | TSCA |
| 06/16/2008 | TSCA-08-2008-0007 | PETER PAULOS | TSCA |
| 08/07/2008 | CERCLA-08-2008-0007 | BARKER-HUGHESVILLE SUPERFUND SITE; CASCADE AND JUDITH BASIN COUNTIES
THE DOE RUN RESOURCES CORPORATION | CERLCA |
| 08/20/2008 | CAA-08-2008-0027 | CHEVRON PRODUCTS COMPANY SALT LAKE CITY REFINERY | CAA |
| 09/12/2008 | CWA-08-2008-0026 | SCOTT M. SHEPHERD AND TWO BUDS, LLC | CWA |
| 09/23/2008 | CERCLA-08-2008-0009 | ANACONDA SMELTER SUPERFUND SITE - ATLANTIC RICHFIELD COMPANY | CERCLA |
| 09/30/2008 | CERCLA-08-2008-0011 | CITY AND COUNTY OF DENVER, COLORADO | CERLCA |
| 10/23/2008 | TSCA-08-2009-0001 | TYLER THEOBALD | TSCA |
| 02/03/2009 | TSCA-08-2009-0009 | MR. TYLER THEOBALD | TSCA |
| 02/19/2009 | CWA-08-2009-0006 | FULTON FUEL COMPANY | CWA |
| 09/25/2009 | CWA-08-2009-0031 | CITY OF BILLINGS, THE | CWA |
| 11/10/2009 | SDWA-08-2010-0004 | BEAVERHEAD JACKSON WATER AND SEWER DISTRICT | PWS |
| 01/13/2010 | CWA-08-2010-0004 | SAV-O-MAT - CASTLE ROCK | CWA |
| 02/11/2010 | CWA-08-2010-0007 | WESTERN CONVENIENCE STORE #104, CASTLE ROCK | CWA |
| 03/16/2010 | TSCA-08-2010-0002 | U.S. DEPARTMENT OF DEFENSE; DEPARTMENT OF THE AIRFORCE AIR MOBILITY COMMAND; 319TH AIR REFUELING WING GRAND FORKS AIR FORCE BASE | TSCA |
| 04/28/2010 | TSCA(SUB)-08-2010-0003 | JERRY FAULCONER, BURLY SEAL PRODUCTS COMPANY | TSCA |
| 05/03/2010 | CWA-08-2010-0013 | WOLF CREEK PASS TANKER TRUCK RELEASE, MILE 179 OF HIGHWAY 160, MINERAL COUNTY COLORADO; AND J.C. HUNT TRUCKING, c/o CARL HUNT | CWA |
| 05/10/2010 | CERCLA-08-2010-0003 | BILLINGS PCE SITE; J.E.M., LLC. | CERCLA |
| 05/20/2010 | CWA-08-2010-0015 | PETER AND BONNIE MOORE (GRASSLANDS ENTERPRISES) | CWA |
| 06/24/2010 | TSCA-08-2010-0004 | JERRY FAULCONER, PRESIDENT AND CEO; BURLY SEAL PRODUCTS COMPANY | TSCA |
| 09/10/2010 | CWA-08-2010-0029 | POLIDORI CORPORATION, INC. AND POLI-GOLD, L. L. C. | CWA |
| 09/13/2010 | CERCLA-08-2010-0004 | ANACONDA SMELTER SUPERFUND SITE, REGIONAL WATER, WASTE, AND SOILS OPERABLE UNIT, FLUVIAL TAILINGS REMEDIAL DESIGN UNIT; ATLANTIC RICHFIELD COMPANY | CERLCA |
| 09/13/2010 | CERCLA-08-2010-0005 | ANACONDA SMELTER SUPERFUND SITE, REGINAL WATER, WASTE, AND SOILS OPERABLE UNIT, EAST PORTION ACTIVE RAILROAD/BLUE LAGOON REMEDIAL DESIGN UNIT, WEST PORTION - ATLANTIC RICHFIELD CO., RARUS RAILWAY CO., | CERLCA |
| 09/27/2010 | CWA-08-2010-0035 | ELAM CONSTRUCTION, INC.; SCOTT R. and SHEILA M. BRENNISE; 4B LAND & LIVESTOCK, LLC. | CWA |
| 10/28/2010 | CWA-08-2011-0002 | DOCKMASTER, INC. | CWA |
| 02/08/2011 | CAA-08-2011-0005 | CONOCOPHILLIPS LA JUNTA TERMINAL | CAA |
| 03/17/2011 | CERLCA-08-2011-0006 | EUREKA MILLS SUPERFUND SITE - GCL EUREKA PROPERTIES, LLC. | CERLCA |
| 06/02/2011 | CERCLA-08-2011-0009 | ANACONDA SMELTER SUPERFUND SITE, REGIONAL WATER, WASTE, AND SOILS OPERABLE UNIT, SMELTER HILL FACILITIES ARE REMEDIAL DESIGN UNIT - ATLANTIC RICHFIELD COMPANY | CERLCA |
| 06/09/2011 | CWA-08-2011-0015 | ROBERT GREGG SEASE | CWA |
| 06/16/2011 | CERCLA-08-2011-0010 | BARKER-HUGHESVILLE SUPERFUND SITE CASCADE AND JUDITH BASIN COUNTIES, MONTANA - THE DOE RUN RESOURCES CORP. | CERCLA 122(h) |
| 06/22/2011 | CWA-08-2011-0018 | JAHANBIN GANDOMCAR - GANDOMEAR PROPERTIES, LLC. | CWA |
| 07/07/2011 | CWA-08-2011-0020 | EXXONMOBIL SILVERTIP PIPELINE SPILL | CWA |
| 07/20/2011 | CERCLA-08-2011-0011 | BUTTE PRIORITY SOILS OPERABLE UNIT OF THE SILVER BOW CREEK/BUTTE AREA (BUTTE PORTION) SITE | CERLCA |
| 08/04/2011 | CERCLA-08-2011-0013 | U. S. MAGNESIUM SITE - U. S. MAGNESIUM LLC. | CERCLA 122(h) |
| 09/08/2011 | CERCLA-08-2011-0017 | ACM SMELTER AND REFINERY SITE - OPERABLE UNIT #1 ATLANTIC RICHFIELD CO., ARCO ENVIRONMENTAL REMEDIATION, L.L.C. | CERLCA |
| 09/27/2011 | SDWA-08-2011-0077 | TAS PROPERTIES, LLC. and THEODORE SCHUMACHER a/k/a TED SCHUMACHER | SDWA |
| 12/14/2011 | CWA-08-2012-0002 | POLIDORI CORPORATION, INC.; POLI-GOLD, L.L.C.; VERONICA POLIDORI | CWA |
| 02/01/2012 | CAA-08-2012-0002 | ROCKY MOUNTAIN BOTTLE COMPANY, LLC. | CAA |
| 02/28/2012 | SDWA-08-2012-0012 | PAINT ROCK CANYON ENTERPRISES, LLC. and C5 YOUTH FOUNDATION OF SOUTHERN CALIFORNIA, INC. | SDWA |
| 04/06/2012 | RCRA-08-2012-0001 | R360 ENVIRONMENTAL SOLUTIONS, INC. | RCRA |
| 04/09/2012 | CWA-08-2012-0011 | WILDCAT MINING CORPORATION; VARCA VENTURES, INC. | CWA |
| 10/30/2012 | CWA-08-2013-0002 | LYNN BUTTARS | CWA |
| 11/27/2012 | CWA-08-2013-0005 | UINTA COUNTY; GARY FENUS; TOWN OF MOUNTAIN VIEW | CWA |
| 02/19/2013 | CERCLA-08-2013-0001 | RICHARDSON FLAT TAILINGS SITE OPERABLE UNITE #4 - PARK CITY MUNICIPAL CORPORATION | CERCLA |
| 03/19/2013 | CERCLA-08-2013-0002 | EUREKA MILL SUPERFUND SITE and GCL EUREKA PROPERTIES, LLC. and GRANT LOADER | CERCLA |
| 03/21/2013 | CWA-08-2013-0019 | PARACHUTE CREEK GAS PLANT OIL SPILL | CWA |
| 04/11/2013 | CWA-08-2013-0010 | CITY OF RONAN WASTEWATER TREATMENT FACILITY | CWA |
| 09/24/2013 | CWA-08-2013-0032 | JAMES AND KAY BIANCO | CWA |
| 11/06/2013 | CWA-08-2014-0006 | LELAND F. WILSON | CWA |
| 02/21/2014 | RCRA-08-2014-0001 | U. S. MAGNESIUM, LLC. | RCRA |
| 05/22/2014 | CERCLA-08-2014-0004 | LOCKWOOD SOLVFENT SITE, OU 2 - KELLER TRANSPORT, INC. | CERCLA |
| 06/16/2014 | CWA-08-2014-0023 | SCOTT WAGNER and LEIGH MARIE, LLC. | CWA |
| 06/23/2014 | CWA-08-2014-0024 | ROBERT GREGG SEASE | CWA |
| 07/15/2014 | CERCLA-08-2014-0006 | LINCOLN PARK SUPERFUND SITE - COTTER CORPORATION (N.S.L) | CERCLA |
| 09/17/2014 | SDWA-08-2014-0042 | BEAVERHEAD COUNTY JACKSON WATER AND/OR SEWER DISTRICT | SDWA |
| 09/28/2014 | SDWA-08-2014-0024 | BEAVERHEAD JACKSON WATER AND SEWER DISTRICT | PWS |
| 12/17/2014 | CWA-08-2015-0007 | NEWFIELD PRODUCTION COMPANY | CWA |
| 01/12/2015 | CWA-08-2015-0011 | DR. THOMAS RICHARDS (LITTLE GOOSE CREEK) | CWA |
| 04/06/2015 | CWA-08-2015-0014 | THE TOWN OF LODGE GRASS | CWA |
| 05/14/2015 | CWA-08-2015-0015 | FOXTAIL CREEK, L.L.C | CWA |
| 06/08/2015 | CWA-08-2015-0017 | THE CITY OF POPLAR, MONTANA WASTEWATER TREATMENT FACILITY | CWA |
| 07/01/2015 | CERCLA-08-2015-0006 | VASQUEZ BOULEVARD/INTERSTATE 70 SITE - OU #2; CITY AND COUNTY OF DENVER | CERCLA |
| 07/07/2015 | CWA-08-2015-0020 | NORTHERN CHEYENNE UTILITIES COMMISSION; LAME DEER WASTEWATER TREATMENT FACILITY | CWA |
| 08/19/2015 | CAA-08-2015-0015 | TESORO REFINING & MARKETING COMPANY, LLC, | CAA |
| 09/24/2015 | CERCLA-08-2015-0010 | ANACONDA SMELTER SUPERFUND SITE, REGIONAL WATER, WASTE, AND SOILS OPERABLE UNIT, WARM SPRINGS CREEK REMEDIAL DESIGN UNIT - ATLANTIC RICHFIELD COMPANY | CERCLA |
| 09/24/2015 | CERCLA-08-2015-0011 | ANACONDA SMELTER SUPERFUND SITE, COMMUNITY SOILS OPERABLE UNIT - ATLANTIC RICHFIELD COMPANY | CERCLA |
| 09/28/2015 | SDWA-08-2015-0050 | PAINT ROCK CANYON ENTERPRISES, LLC. and C5 YOUTH FOUNDATION OF SOUTHERN CALIFORNIA, INC. | SDWA |
| 09/29/2015 | CWA-08-2015-0029 | CLEARWATER HOLDINGS, LLC. | CWA |
| 09/29/2015 | RCRA-08-2015-0003 | HIGH PLAINS MOTORS, INC. | RCRA |
| 11/12/2015 | CERCLA-08-2016-0001 | SMURFIT STONE MILL SITE - INTERNATIONAL PAPER COMPANY; WESTROCK CP., LLC.; M2 GREEN REDEVELOPMENT LLC. | CERCLA |
| 11/30/2015 | CERCLA-08-2016-0002 | COLUMBIA FALLS ALUMINUM PLANT a/k/a ANACONDA ALUMINUM CO., COLUMBIA FALLS REDUCTION PLANT; COLUMBIA FALLS ALUMINUM COMPANY LLC. | CERLCA |
| 02/09/2016 | RCRA-08-2016-0002 | OGLALA SIOUX TRIBE & REDSHIRT LANDFILL | RCRA |
| 05/26/2016 | CERCLA-08-2016-0003 | LINCOLN PARK SUPERFUND SITE | CERCLA |
| 06/22/2016 | CERCLA-08-2016-0005 | ANACONDA SMELTER SUPERFUND SITE & ATLANTIC RICHFIELD COMPANY | CERCLA |
| 08/03/2016 | RCRA-08-2016-0004 | US MAGNESIUM LLC | RCRA |
| 08/26/2016 | RCRA-08-2016-0007 | HARVEY OST OILFIELD SERVICES, LLC | RCRA |
| 09/13/2016 | CWA-08-2016-0016 | ROGER LOTHSPEICH | CWA |
| 12/06/2016 | SDWA-08-2017-0005 | PIONEER NATURAL RESOURCES | SDWA |
| 12/27/2016 | SDWA-08-2017-0007 | MONUMENT GLOBAL RESOURCES, INC. | SDWA |
| 01/12/2017 | CWA-08-2017-0005 | ROBERT GREGG SEASE | CWA |
| 01/12/2017 | CWA-08-2017-0009 | ROBERT GREGG SEASE | CWA |
| 03/10/2017 | SDWA-08-2017-0008 | PAINT ROCK ENTERPRISES, LLC & C5 YOUTH FOUNDATION OF SOUTHERN CALIFORNIA, INC. | SDWA |
| 03/21/2017 | CWA-08-2017-0008 | LINCOLN COUNTY | CWA |
| 04/24/2017 | CWA-08-2017-0011 | CRESTWOOD EQUITY PARTNERS, LP | CWA |
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