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REMEDIAL LIABILITIES (Tables) | 3 Months Ended
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Mar. 31, 2021
Environmental Remediation Obligations [Abstract] |
Schedule of Changes to Remedial Liabilities | The changes to remedial liabilities from January 1, 2021 through March 31, 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 | 22 |  |  | 654 |  |  | 414 |  |  | 1,090 |
Changes in estimates recorded to consolidated statement of operations | 17 |  |  | 180 |  |  | 49 |  |  | 246 |
Expenditures | (12) |  |  | (950) |  |  | (1,120) |  |  | (2,082) |
Currency translation and other | — |  |  | (812) |  |  | 993 |  |  | 181 |
Balance at March 31, 2021 | $ | 1,892 |  |  | $ | 62,132 |  |  | $ | 50,224 |  |  | $ | 114,248 |

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