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REMEDIAL LIABILITIES (Tables) | 9 Months Ended
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Sep. 30, 2021
Environmental Remediation Obligations [Abstract] |
Schedule of Changes to Remedial Liabilities | The changes to remedial liabilities from January 1, 2021 through September 30, 2021 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, 2021 | $ | 1,865 |  |  | $ | 63,060 |  |  | $ | 49,888 |  |  | $ | 114,813 |
Accretion | 67 |  |  | 1,955 |  |  | 1,259 |  |  | 3,281 |
Changes in estimates recorded to consolidated statement of operations | (22) |  |  | 358 |  |  | (321) |  |  | 15 |
Expenditures | (37) |  |  | (3,963) |  |  | (3,342) |  |  | (7,342) |
Currency translation and other | — |  |  | (821) |  |  | 870 |  |  | 49 |
Balance at September 30, 2021 | $ | 1,873 |  |  | $ | 60,589 |  |  | $ | 48,354 |  |  | $ | 110,816 |

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