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18. PROVISION FOR ENVIRONMENTAL LIABILITIES AND ASSET RETIREMENT OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2018

Provision For Environmental Liabilities And Asset Retirement Obligations Tables Abstract

Provision for environmental liabilities and asset retirement obligation

			Consolidated
	12/31/2018		12/31/2017
Environmental liabilities	198,386		255,517
Asset retirement obligations	83,380		81,496
	281,766		337,013

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