| Form: | S-4 |
| CIK: | 0000822818 | | Company Name: | CLEAN HARBORS INC | | File Number: | 333-211234 |
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| CIK: | 0001525322 | | Company Name: | Sanitherm USA, Inc. | | File Number: | 333-211234-74 |
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| CIK: | 0001525324 | | Company Name: | ARC Advanced Reactors & Columns, LLC | | File Number: | 333-211234-73 |
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| CIK: | 0001525326 | | Company Name: | Clean Harbors Catalyst Services, LLC | | File Number: | 333-211234-72 |
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| CIK: | 0001330899 | | Company Name: | Plaquemine Remediation Services, LLC | | File Number: | 333-211234-71 |
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| CIK: | 0001525327 | | Company Name: | Clean Harbors Exploration Services, Inc. | | File Number: | 333-211234-70 |
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| CIK: | 0001525328 | | Company Name: | Clean Harbors Industrial Services, Inc. | | File Number: | 333-211234-69 |
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| CIK: | 0001330867 | | Company Name: | Altair Disposal Services, LLC | | File Number: | 333-211234-68 |
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| CIK: | 0001330868 | | Company Name: | BATON ROUGE DISPOSAL, LLC | | File Number: | 333-211234-67 |
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| CIK: | 0001330869 | | Company Name: | BRIDGEPORT DISPOSAL, LLC | | File Number: | 333-211234-66 |
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| CIK: | 0001330870 | | Company Name: | CH INTERNATIONAL HOLDINGS, LLC | | File Number: | 333-211234-65 |
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| CIK: | 0001330871 | | Company Name: | CLEAN HARBORS ANDOVER, LLC | | File Number: | 333-211234-64 |
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| CIK: | 0001330872 | | Company Name: | CLEAN HARBORS ANTIOCH, LLC | | File Number: | 333-211234-63 |
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| CIK: | 0001330918 | | Company Name: | Clean Harbors Clive, LLC | | File Number: | 333-211234-62 |
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| CIK: | 0001330879 | | Company Name: | CLEAN HARBORS COFFEYVILLE, LLC | | File Number: | 333-211234-61 |
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| CIK: | 0001330880 | | Company Name: | CLEAN HARBORS COLFAX, LLC | | File Number: | 333-211234-60 |
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| CIK: | 0001330882 | | Company Name: | CLEAN HARBORS DEER PARK, LLC | | File Number: | 333-211234-59 |
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| CIK: | 0001330883 | | Company Name: | CLEAN HARBORS DEER TRAIL, LLC | | File Number: | 333-211234-58 |
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| CIK: | 0001330884 | | Company Name: | CLEAN HARBORS DISPOSAL SERVICES, INC. | | File Number: | 333-211234-57 |
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| CIK: | 0000925491 | | Company Name: | CLEAN HARBORS ENVIRONMENTAL SERVICES INC | | File Number: | 333-211234-56 |
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| CIK: | 0001330886 | | Company Name: | CLEAN HARBORS FLORIDA, LLC | | File Number: | 333-211234-55 |
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| CIK: | 0001330887 | | Company Name: | CLEAN HARBORS GRASSY MOUNTAIN, LLC | | File Number: | 333-211234-54 |
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| CIK: | 0001330888 | | Company Name: | CLEAN HARBORS KANSAS, LLC | | File Number: | 333-211234-53 |
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| CIK: | 0000925493 | | Company Name: | CLEAN HARBORS KINGSTON FACILITY CORP | | File Number: | 333-211234-52 |
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| CIK: | 0001330889 | | Company Name: | CLEAN HARBORS LAPORTE, LLC | | File Number: | 333-211234-51 |
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| CIK: | 0001330890 | | Company Name: | CLEAN HARBORS LAUREL, LLC | | File Number: | 333-211234-50 |
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| CIK: | 0001330892 | | Company Name: | CLEAN HARBORS LONE MOUNTAIN, LLC | | File Number: | 333-211234-49 |
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| CIK: | 0001330895 | | Company Name: | CLEAN HARBORS (MEXICO), INC. | | File Number: | 333-211234-48 |
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| CIK: | 0000925502 | | Company Name: | CLEAN HARBORS OF BALTIMORE INC | | File Number: | 333-211234-47 |
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| CIK: | 0000925504 | | Company Name: | CLEAN HARBORS OF BRAINTREE INC | | File Number: | 333-211234-46 |
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| CIK: | 0000925499 | | Company Name: | CLEAN HARBORS OF CONNECTICUT INC | | File Number: | 333-211234-45 |
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| CIK: | 0001330898 | | Company Name: | CLEAN HARBORS PECATONICA, LLC | | File Number: | 333-211234-44 |
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| CIK: | 0001330900 | | Company Name: | CLEAN HARBORS PPM, LLC | | File Number: | 333-211234-43 |
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| CIK: | 0001330902 | | Company Name: | CLEAN HARBORS REIDSVILLE, LLC | | File Number: | 333-211234-42 |
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| CIK: | 0001330904 | | Company Name: | CLEAN HARBORS SAN JOSE, LLC | | File Number: | 333-211234-41 |
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| CIK: | 0001330906 | | Company Name: | CLEAN HARBORS SERVICES, INC. | | File Number: | 333-211234-40 |
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| CIK: | 0001330907 | | Company Name: | CLEAN HARBORS TENNESSEE, LLC | | File Number: | 333-211234-39 |
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| CIK: | 0001330909 | | Company Name: | CLEAN HARBORS WESTMORLAND, LLC | | File Number: | 333-211234-38 |
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| CIK: | 0001330910 | | Company Name: | CLEAN HARBORS WHITE CASTLE, LLC | | File Number: | 333-211234-37 |
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| CIK: | 0001330911 | | Company Name: | CROWLEY DISPOSAL, LLC | | File Number: | 333-211234-36 |
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| CIK: | 0001330914 | | Company Name: | DISPOSAL PROPERTIES, LLC | | File Number: | 333-211234-35 |
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| CIK: | 0001571748 | | Company Name: | Safety-Kleen Envirosystems Co | | File Number: | 333-211234-34 |
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| CIK: | 0001571760 | | Company Name: | Safety-Kleen Envirosystems Co of Puerto Rico, Inc. | | File Number: | 333-211234-33 |
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| CIK: | 0001571746 | | Company Name: | Safety-Kleen, Inc. | | File Number: | 333-211234-32 |
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| CIK: | 0001572086 | | Company Name: | Safety-Kleen International, Inc. | | File Number: | 333-211234-31 |
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| CIK: | 0001572083 | | Company Name: | Safety-Kleen Systems, Inc. | | File Number: | 333-211234-30 |
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| CIK: | 0001572080 | | Company Name: | SK Holding Company, Inc. | | File Number: | 333-211234-29 |
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| CIK: | 0001572038 | | Company Name: | Solvents Recovery Service of New Jersey, Inc. | | File Number: | 333-211234-28 |
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| CIK: | 0001477866 | | Company Name: | Clean Harbors San Leon, Inc. | | File Number: | 333-211234-27 |
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| CIK: | 0001670528 | | Company Name: | Versant Energy Services, Inc. | | File Number: | 333-211234-26 |
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| CIK: | 0001553013 | | Company Name: | HECKMANN ENVIRONMENTAL SERVICES, INC. | | File Number: | 333-211234-25 |
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| CIK: | 0001553011 | | Company Name: | THERMO FLUIDS INC. | | File Number: | 333-211234-24 |
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| CIK: | 0001670520 | | Company Name: | Safety-Kleen of California, Inc. | | File Number: | 333-211234-23 |
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| CIK: | 0001670515 | | Company Name: | Clean Harbors Surface Rentals USA, Inc. | | File Number: | 333-211234-22 |
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| CIK: | 0001330915 | | Company Name: | GSX DISPOSAL, LLC | | File Number: | 333-211234-21 |
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| CIK: | 0001330917 | | Company Name: | HILLIARD DISPOSAL, LLC | | File Number: | 333-211234-20 |
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| CIK: | 0000925496 | | Company Name: | MURPHYS WASTE OIL SERVICE INC | | File Number: | 333-211234-19 |
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| CIK: | 0001330921 | | Company Name: | ROEBUCK DISPOSAL, LLC | | File Number: | 333-211234-18 |
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| CIK: | 0001330922 | | Company Name: | SAWYER DISPOSAL SERVICES, LLC | | File Number: | 333-211234-17 |
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| CIK: | 0001330923 | | Company Name: | SERVICE CHEMICAL, LLC | | File Number: | 333-211234-16 |
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| CIK: | 0000925495 | | Company Name: | SPRING GROVE RESOURCE RECOVERY INC | | File Number: | 333-211234-15 |
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| CIK: | 0001330925 | | Company Name: | TULSA DISPOSAL, LLC | | File Number: | 333-211234-14 |
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| CIK: | 0001473858 | | Company Name: | CLEAN HARBORS RECYCLING SERVICES OF CHICAGO, LLC | | File Number: | 333-211234-13 |
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| CIK: | 0001473859 | | Company Name: | Clean Harbors Development, LLC | | File Number: | 333-211234-12 |
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| CIK: | 0001473864 | | Company Name: | CLEAN HARBORS WILMINGTON, LLC | | File Number: | 333-211234-11 |
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| CIK: | 0001473860 | | Company Name: | CLEAN HARBORS RECYCLING OF OHIO, LLC | | File Number: | 333-211234-10 |
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| CIK: | 0001473934 | | Company Name: | CLEAN HARBORS EL DORADO, LLC | | File Number: | 333-211234-09 |
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| CIK: | 0001330873 | | Company Name: | CLEAN HARBORS ARAGONITE, LLC | | File Number: | 333-211234-08 |
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| CIK: | 0001330874 | | Company Name: | CLEAN HARBORS ARIZONA, LLC | | File Number: | 333-211234-07 |
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| CIK: | 0001330875 | | Company Name: | CLEAN HARBORS BATON ROUGE, LLC | | File Number: | 333-211234-06 |
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| CIK: | 0001330876 | | Company Name: | CLEAN HARBORS BDT, LLC | | File Number: | 333-211234-05 |
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| CIK: | 0001330877 | | Company Name: | CLEAN HARBORS BUTTONWILLOW, LLC | | File Number: | 333-211234-04 |
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| CIK: | 0001330878 | | Company Name: | CLEAN HARBORS CHATTANOOGA, LLC | | File Number: | 333-211234-03 |
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| CIK: | 0001330893 | | Company Name: | CLEAN HARBORS LONE STAR CORP. | | File Number: | 333-211234-02 |
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| CIK: | 0001330894 | | Company Name: | CLEAN HARBORS LOS ANGELES, LLC | | File Number: | 333-211234-01 |
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