Contingencies

Certain processes in the manufacture of our current and past products create by-products classified as hazardous waste. We have been notified by the U.S. Environmental Protection Agency, state environmental agencies, and in some cases, groups of potentially responsible parties, that we are potentially liable for environmental contamination at several sites currently and formerly owned or operated by CTS. Some sites, such as Asheville, North Carolina and Mountain View, California, are designated National Priorities List Superfund sites under the U.S. Environmental Protection Agency’s Superfund program. We reserve for probable remediation activities at these sites and for claims and proceedings against CTS with respect to other environmental matters. We record reserves on an undiscounted basis. In the opinion of management, based upon presently available information relating to such matters, adequate provision for probable and estimable costs have been recorded. We do not have any known environmental obligations where a loss is probable or reasonably possible of occurring for which we do not have a reserve, nor do we have any amounts for which we have not reserved because the amount of the loss cannot be reasonably estimated. Due to the inherent nature of environmental obligations, we cannot provide assurance that our ultimate environmental liability will not materially exceed the amount of our current reserve. Our reserve and disclosures will be adjusted accordingly if additional information becomes available in the future.

A roll-forward of remediation reserves on the balance sheet is comprised of the following:



	Years Ended December 31,
	2018			2017			2016
Balance at beginning of period	$	17,067		$	18,176		$	20,603
Remediation expense	1,182			307			556
Remediation payments	(6,967		)	(1,416		)	(2,983		)
Other activity (1)	(8		)	—			—
Balance at end of the period	$	11,274		$	17,067		$	18,176
(1) Other activity includes currency translation adjustments not recorded through remediation expense

Unrelated to the environmental claims described above, certain other legal claims are pending against us with respect to matters arising out of the ordinary conduct of our business. Although the ultimate outcome of any potential litigation resulting from these claims cannot be predicted with certainty, and some may be disposed of unfavorably to CTS, management believes that adequate provision for anticipated costs have been established based upon all presently available information. Except as noted herein, we do not believe we have any pending loss contingencies that are probable or reasonably possible of having a material impact on our consolidated financial position, results of operations or cash flows.