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CLOSURE AND POST-CLOSURE LIABILITIES | 6 Months Ended
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Jun. 30, 2022
Asset Retirement Obligation Disclosure [Abstract] |
CLOSURE AND POST-CLOSURE LIABILITIES | CLOSURE AND POST-CLOSURE LIABILITIES The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2022 through June 30, 2022 were as follows (in thousands):
| Landfill Retirement Liability |  | Non-Landfill Retirement Liability |  | Total
Balance at January 1, 2022 | $ | 53,425 |  |  | $ | 45,678 |  |  | $ | 99,103 |
New asset retirement obligations | 1,657 |  |  | — |  |  | 1,657 |
Accretion | 2,250 |  |  | 1,993 |  |  | 4,243 |
Changes in estimates recorded to consolidated statement of operations | 329 |  |  | 47 |  |  | 376 |
Changes in estimates recorded to consolidated balance sheet | — |  |  | 504 |  |  | 504 |
Expenditures | (2,126) |  |  | (622) |  |  | (2,748) |
Currency translation and other | (100) |  |  | (38) |  |  | (138) |
Balance at June 30, 2022 | $ | 55,435 |  |  | $ | 47,562 |  |  | $ | 102,997 |
In the six months ended June 30, 2022, there were no significant charges or benefits resulting from changes in estimates for closure and post-closure liabilities. New asset retirement obligations incurred during the first six months of 2022 were discounted at the credit-adjusted risk-free rate of 5.37%.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7569-110849 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -URI https://asc.fasb.org/subtopic&trid=2175671 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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