| Subsidiary | Jurisdiction of Organization | ||||
| Ace/Allwaste Environmental Services of Indiana, LLC | Illinois | ||||
| Altair Disposal Services, LLC | Delaware | ||||
| Aquilex Finance LLC | Delaware | ||||
| Aquilex Intermediate Corporate Holdings LLC | Delaware | ||||
| Aquilex Intermediate Holdings LLC | Delaware | ||||
| Aquilex LLC | Delaware | ||||
| Baton Rouge Disposal, LLC | Delaware | ||||
| Bridgeport Disposal, LLC | Delaware | ||||
| CARBER Holdings, Inc. | Delaware | ||||
| CB Canada Acquisition, Inc.* | Ontario | ||||
| CB Canada Holdings, Inc.* | Ontario | ||||
| CB US Holdings, Inc. | Delaware | ||||
| CH International Holdings, LLC | Delaware | ||||
| Clean Harbors Andover, LLC | Delaware | ||||
| Clean Harbors Aragonite, LLC | Delaware | ||||
| Clean Harbors Arizona, LLC | Delaware | ||||
| Clean Harbors Baton Rouge, LLC | Delaware | ||||
| Clean Harbors BDT, LLC | Delaware | ||||
| Clean Harbors Buttonwillow, LLC | Delaware | ||||
| Clean Harbors Canada, Inc.* | New Brunswick | ||||
| Clean Harbors Caribe, Inc.* | Puerto Rico | ||||
| Clean Harbors Chattanooga, LLC | Delaware | ||||
| Clean Harbors Clive, LLC | Delaware | ||||
| Clean Harbors Coffeyville, LLC | Delaware | ||||
| Clean Harbors Colfax, LLC | Delaware | ||||
| Clean Harbors Deer Park, LLC | Delaware | ||||
| Clean Harbors Deer Trail, LLC | Delaware | ||||
| Clean Harbors Development, LLC | Delaware | ||||
| Clean Harbors Disposal Services, Inc. | Delaware | ||||
| Clean Harbors El Dorado, LLC | Delaware | ||||
| Clean Harbors Energy and Industrial Services Corp.* | Alberta | ||||
| Clean Harbors Energy and Industrial Services LP* | Alberta | ||||
| Clean Harbors Energy and Industrial Western Ltd.* | Alberta | ||||
| Clean Harbors Energy Services, ULC* | Alberta | ||||
| Clean Harbors Environmental Services, Inc. | Massachusetts | ||||
| Clean Harbors Exploration Services, Inc. | Nevada | ||||
| Clean Harbors Florida, LLC | Delaware | ||||
| Clean Harbors Grassy Mountain, LLC | Delaware | ||||
| Clean Harbors India LLP* | India | ||||
| Clean Harbors Industrial Services Canada, Inc.* | Alberta | ||||
| Clean Harbors Innu Environmental Services, Inc.* | Newfoundland | ||||
| Clean Harbors Kansas, LLC | Delaware | ||||
| Subsidiary | Jurisdiction of Organization | ||||
| Clean Harbors Kimball Realty, LLC | Delaware | ||||
| Clean Harbors Kingston Facility Corporation | Massachusetts | ||||
| Clean Harbors LaPorte, LLC | Delaware | ||||
| Clean Harbors Laurel, LLC | Delaware | ||||
| Clean Harbors Lodging Services LP* | Alberta | ||||
| Clean Harbors Lodging Services, ULC* | Alberta | ||||
| Clean Harbors Lone Mountain, LLC | Delaware | ||||
| Clean Harbors Mercier, Inc.* | Quebec | ||||
| Clean Harbors of Baltimore, Inc. (DE Corp.) | Delaware | ||||
| Clean Harbors of Braintree, Inc. | Massachusetts | ||||
| Clean Harbors of Connecticut, Inc. (DE) | Delaware | ||||
| Clean Harbors Pecatonica, LLC | Delaware | ||||
| Clean Harbors Production Services, ULC* | Alberta | ||||
| Clean Harbors Quebec, Inc.* | Quebec | ||||
| Clean Harbors Recycling Services of Chicago, LLC | Delaware | ||||
| Clean Harbors Recycling Services of Ohio, LLC | Delaware | ||||
| Clean Harbors Reidsville, LLC | Delaware | ||||
| Clean Harbors San Jose, LLC | Delaware | ||||
| Clean Harbors San Leon, Inc. | Delaware | ||||
| Clean Harbors Services, Inc. | Massachusetts | ||||
| Clean Harbors Surface Rentals Partnership* | Alberta | ||||
| Clean Harbors Surface Rentals USA, Inc. | Delaware | ||||
| Clean Harbors Surface Rentals, ULC* | Alberta | ||||
| Clean Harbors Tennessee, LLC | Delaware | ||||
| Clean Harbors Westmorland, LLC | Delaware | ||||
| Clean Harbors White Castle, LLC | Delaware | ||||
| Clean Harbors Wichita, LLC | Delaware | ||||
| Clean Harbors Wilmington, LLC | Delaware | ||||
| Clean Harbors, Inc. | Massachusetts | ||||
| Cousins Waste Control, LLC | Ohio | ||||
| Crowley Disposal, LLC | Delaware | ||||
| Cyn Oil Corporation | Massachusetts | ||||
| Disposal Properties, LLC | Delaware | ||||
| Emerald Services, Inc. | Washington | ||||
| Emergency Response and Training Solutions, LLC | Delaware | ||||
| Environmental Management Alternatives, LLC | Delaware | ||||
| Environmental Management Specialists, LLC | Delaware | ||||
| EnviroSORT Inc.* | Alberta | ||||
| Green View Technologies, Inc. | New Hampshire | ||||
| GSX Disposal, LLC | Delaware | ||||
| Hepaco Blocker, Inc. | Delaware | ||||
| Hepaco GC, LLC | Delaware | ||||
| Hepaco Holding, LLC | Delaware | ||||
| Subsidiary | Jurisdiction of Organization | ||||
| Hepaco, LLC | Delaware | ||||
| Hilliard Disposal, LLC | Delaware | ||||
| HPC Industrial Group, LLC | Delaware | ||||
| HPC Industrial Services, LLC | Delaware | ||||
| HydroChem Canada ULC* | Alberta | ||||
| Industrial Service Oil Company, Inc. | California | ||||
| Jesco Industrial Service, LLC | Kentucky | ||||
| Laidlaw Environmental Services de Mexico S.A. de C.V.* | Mexico | ||||
| LJ Energy Services Intermediate Holding Corp. | Delaware | ||||
| Lonestar Sylvan Inc.* | Federally Chartered | ||||
| Lonestar Vacuum Inc.* | Alberta | ||||
| Lonestar West Enterprises LLC | Oklahoma | ||||
| Lonestar West Inc.* | Federally Chartered | ||||
| Lonestar West Services LLC | Nevada | ||||
| Murphy's Waste Oil Service, Inc. | Massachusetts | ||||
| Noble Oil Services, Inc. | North Carolina | ||||
| Northeast Casualty Insurance Company | Vermont | ||||
| NTS, LLC | North Carolina | ||||
| Philip Services/North Central, LLC | Iowa | ||||
| Plaquemine Remediation Services, LLC | Delaware | ||||
| PSC Industrial Holdings Corp. | Delaware | ||||
| PSC Industrial Outsourcing of Michigan, LLC | Ohio | ||||
| PSC Industrial Outsourcing, LP | Delaware | ||||
| PSC Industrial, Inc. | Delaware | ||||
| PSC LDAR Services, LLC | Delaware | ||||
| Ricky's Oil & Environmental Services, LLC | Florida | ||||
| RMF Aquilex Corp. | Delaware | ||||
| Roebuck Disposal, LLC | Delaware | ||||
| Rosemead Oil Products, Inc. | California | ||||
| Safety-Kleen Canada Inc.* | New Brunswick | ||||
| Safety-Kleen Envirosystems Company | California | ||||
| Safety-Kleen Envirosystems Company of Puerto Rico, Inc. | Indiana | ||||
| Safety-Kleen International, Inc. | Delaware | ||||
| Safety-Kleen of California, Inc. | California | ||||
| Safety-Kleen Systems, Inc. | Wisconsin | ||||
| Safety-Kleen, Inc. | Delaware | ||||
| Sawyer Disposal Services, LLC | Delaware | ||||
| Seaport Environmental, LLC | Delaware | ||||
| Service Chemical, LLC | Delaware | ||||
| SK D'Incineration Inc.* | Quebec | ||||
| Spring Grove Resource Recovery, Inc. | Delaware | ||||
| Synergy Hydrocarbon Recovery, LLC | Florida | ||||
| Synergy Recycling of Central Florida, LLC | Georgia | ||||
| Synergy Recycling, LLC | Florida | ||||
| Subsidiary | Jurisdiction of Organization | ||||
| The Solvents Recovery Service of New Jersey, Inc. | New Jersey | ||||
| Thermo Fluids Inc. | Delaware | ||||
| Thompson Industrial Services, LLC | North Carolina | ||||
| Tri-vax Enterprises Ltd.* | Alberta | ||||
| Tulsa Disposal, LLC | Delaware | ||||
| Versant Energy Services, Inc. | Delaware | ||||
| Versant Energy Services, LP* | Alberta | ||||