2016 Technical Memo: Update on Corrective Measures Study Activities, March 2016
Now Available:
March 3, 2016 Technical Memo – Former ASARCO East Helena Facility Update on Corrective Measures Studies Activities
2015–2016 Draft Addendum to Interim Measures Work Plan, Jan 2016
Now Available:
January 14, 2016 Former ASARCO East Helena Facility Draft Addendum to Interim Measures Work Plan—2015 and 2016
2015 Final Corrective Measures Study Work Plan, Oct 2015
Now Available:
October 22, 2015 Former ASARCO East Helena Facility Final Corrective Measures Study Work Plan
2015–2016 Final Interim Measures Work Plan, May 2015
Now Available:
May 29, 2015 Former ASARCO East Helena Facility Draft Interim Measures Work Plan—2015 and 2016
2015 Groundwater and Surface Water Corrective Action Monitoring Plan, March 2015
2015 Groundwater and Surface Water Corrective Action Monitoring Plan for the former ASARCO East Helena Facility, prepared March 2015. Download the PDF here.
2015–2016 Draft Interim Measures Work Plan, Feb 2015
Now Available:
February 4, 2015 Former ASARCO East Helena Facility Draft Interim Measures Work Plan
2014 Supplemental Contaminant Source Area Investigation Report, Feb 2015
2014 Supplemental Contaminant Source Area Investigation Report for the Former East Helena Smelter Site. Prepared February 2015.
2014 East Valley Controlled Groundwater Area Petition – Supporting Information, Aug 2014
Supporting Information for the East Valley Controlled Groundwater Area Petition – Lewis and Clark County, Montana
Prepared August 2014
Download the PDF here.
2014 Groundwater and Surface Water Corrective Action Monitoring Plan, July 2014
2014 Groundwater and Surface Water Corrective Action Monitoring Plan for the former ASARCO East Helena Facility, Prepared July 2014. Download the PDF here.
2014 Final Interim Measures Work Plan, May 2014
2014 Former ASARCO East Helena Facility Interim Measures Work Plan, May 2014
Download Final_IMWP_2014_May2014