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REMEDIAL LIABILITIES (Tables)
 12 Months Ended
Dec. 31, 2020
Environmental Remediation Obligations [Abstract]  
Schedule of Changes to Remedial Liabilities
The changes to remedial liabilities from January 1, 2019 through December 31, 2020 were as follows (in thousands):
Remedial
Liabilities for
Landfill Sites		Remedial
Liabilities for
Inactive Sites		Remedial
Liabilities
(Including
Superfund) for
Non-Landfill
Operations		Total
Balance at January 1, 2019$1,838 $65,315 $53,864 $121,017 
Accretion88 2,639 1,808 4,535 
Changes in estimates recorded to consolidated statement of operations(17)(913)(2,087)(3,017)
Expenditures(59)(5,079)(3,724)(8,862)
Currency translation and other1 29 470 500 
Balance at December 31, 20191,851 61,991 50,331 114,173 
Accretion90 2,607 1,701 4,398 
Changes in estimates recorded to consolidated statement of operations(15)2,873 1,272 4,130 
Expenditures(61)(4,332)(3,810)(8,203)
Currency translation and other— (79)394 315 
Balance at December 31, 2020$1,865 $63,060 $49,888 $114,813 
Remedial Liabilities Anticipated Payments for Each of the Next Five Years
Anticipated payments at December 31, 2020 (based on current estimated costs and anticipated timing of necessary regulatory approvals to commence work on remedial activities) for each of the next five years and thereafter were as follows (in thousands):
Year ending December 31, 
2021$12,718 
202219,275 
202311,420 
20249,073 
20256,526 
Thereafter75,915 
Undiscounted remedial liabilities134,927 
Less: Discount(20,114)
Total remedial liabilities$114,813 
Schedule of Environmental Exit Costs by Cost
The following tables show, respectively, (i) the amounts of such estimated liabilities associated with the types of facilities and sites involved and (ii) the amounts of such estimated liabilities associated with each facility or site which represents at least 5% of the total and with all other facilities and sites as a group and as of December 31, 2020.
Estimates based on type of facility or site (in thousands, except percentages):
Type of Facility or SiteRemedial
Liability		% of Total
Reasonably Possible
Additional Liabilities (1)
Facilities now used in active conduct of the Company's business (37 facilities)
$42,151 36.7 %$10,565 
Inactive facilities not now used in active conduct of the Company's business but most of which were acquired because the assumption of remedial liabilities for such facilities was part of the purchase price for the CSD assets (27 facilities)
63,060 54.9 10,716 
Superfund sites (16 sites)
9,602 8.4 960 
Total$114,813 100.0 %$22,241 
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(1)Amounts represent the high end of the range of management's best estimate of the reasonably possible additional liabilities.
Estimates based on amount of potential liability (in thousands, except percentages):
LocationType of Facility or Site
Remedial
Liability(1)
% of Total
Reasonably
Possible
Additional
Liabilities(2)
Baton Rouge, LAClosed incinerator and landfill$25,650 22.3 %$4,208 
Bridgeport, NJClosed incinerator17,832 15.5 2,510 
Mercier, QuebecIdled incinerator and legal proceedings11,158 9.7 1,157 
Linden, NJOperating solvent recycling center7,220 6.3 758 
Various
All other incinerators, landfills, wastewater treatment facilities and service centers (60 facilities)
43,351 37.8 12,648 
Various
Superfund sites (each representing less than 5% of total liabilities) (16 sites)
9,602 8.4 960 
Total $114,813 100.0 %$22,241 
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(1)$24.0 million of the $114.8 million remedial liabilities include estimates related to the legal and administrative proceedings discussed in Note 17, "Commitments and Contingencies," as well as other such estimated remedial liabilities.
(2)Amounts represent the high end of the range of management's best estimate of the reasonably possible additional liabilities.