EMPERIUS MILL SITE CLOSURE
Project Name: Emperius Mill Site, Creede, Colorado
Date Project Began: September 2004
Date Project Completed: February 2010
Project Description: Casey Resources, Inc. (CRI) was retained by Creede Resources, Inc. to complete environmental investigations at the Emperius Mill Site located in Creede, Colorado and to develop remediation plans. CRI completed a surface and subsurface soil investigation at the former mill site to assess potential impacts to soil from the milling operations. Investigation results indicated the surface soil and upper portion of the unconsolidated deposits over the majority of the property contained total arsenic and total lead concentrations greater than the Colorado Department of Public Health and Environment (CDPHE) proposed cleanup values for residential/non-restricted use as well as the less restrictive commercial landuse values. The depth of metals impact was generally two feet, but was recorded as much as five feet below ground surface. Sampling results also indicated that the bedrock underlying the property contained elevated concentrations of total arsenic. Groundwater was not encountered during the environmental investigations. Based on the information collected, CRI developed a Voluntary Cleanup Plan (VCUP) Application that proposed capping of lead impacted materials and where appropriate, consolidation and capping. The VCUP Application was approved by CDPHE and implemented in 2008 and 2009. CRI provided environmental oversight during remediation and per the VCUP completed confirmation sampling in August 2009 to demonstrate proper capping of the Property. A Construction Completion Report was submitted to the CDPHE in December 2009 certifying that the remediation was completed per the VCUP Application. The CDPHE provide a No Action Determination (NAD) for the Emperius Mill Site on February 1, 2010.
Type of Contamination: Mine tailings and related wastes containing heavy metal impacts, primarily arsenic, cadmium, lead, and zinc.