Preliminary Assessment- March 2014

The National Park Service contracted with Environmental Cost Management, Inc. (ECM) to conduct a Preliminary Assessment (PA) to evaluate the potential for release of hazardous constituents related to historical operations and waste management activities at the Keane Wonder Mine in Death Valley National Park.

The PA assessed threats posed to human health and the environment with respect to waste generated at the Keane Site including tailings resulting from milling of gold ore and subsequent cyanide and mercury processing activities. ECM's PA recommended additional investigation at the Keane Site consisting of soil sampling at selected locations around the mill tailings and ground water samples collected from the onsite well and nearby spring for background.

Document Content:

Preliminary Assessment for Keane Wonder Mine   (34.9 MB, PDF file) Disclaimer: Links within the above document(s) were valid as of the date published. Note: Some of the files may be in PDF format and can be viewed using the Adobe Acrobat Reader software. You may download a free copy of from Adobe Systems.