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REMEDIAL LIABILITIES (Tables) | 9 Months Ended
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Sep. 30, 2018
Environmental Remediation Obligations [Abstract] |
Changes to remedial liabilities | The changes to remedial liabilities for the nine months ended September 30, 2018 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, 2018 | $ | 1,800 |  |  | $ | 65,342 |  |  | $ | 57,326 |  |  | $ | 124,468 |
Accretion | 64 |  |  | 2,074 |  |  | 1,395 |  |  | 3,533 |
Changes in estimates recorded to statement of operations | — |  |  | (56 | ) |  | (645 | ) |  | (701 | )
Expenditures | (35 | ) |  | (2,911 | ) |  | (3,236 | ) |  | (6,182 | )
Currency translation and other | — |  |  | 892 |  |  | (1,298 | ) |  | (406 | )
Balance at September 30, 2018 | $ | 1,829 |  |  | $ | 65,341 |  |  | $ | 53,542 |  |  | $ | 120,712 |

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