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REMEDIAL LIABILITIES (Tables) | 6 Months Ended
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Jun. 30, 2019
Environmental Remediation Obligations [Abstract] |
Changes to remedial liabilities | The changes to remedial liabilities from January 1, 2019 through June 30, 2019 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 |
Accretion | 44 |  |  | 1,359 |  |  | 889 |  |  | 2,292 |
Changes in estimates recorded to statement of operations | 23 |  |  | 171 |  |  | (1,049 | ) |  | (855 | )
Expenditures | (29 | ) |  | (2,445 | ) |  | (2,122 | ) |  | (4,596 | )
Currency translation and other | — |  |  | 24 |  |  | 393 |  |  | 417 |
Balance at June 30, 2019 | $ | 1,876 |  |  | $ | 64,424 |  |  | $ | 51,975 |  |  | $ | 118,275 |

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