anaconda mine site groundwater investigation community meeting january 31, 2013
DESCRIPTION
ANACONDA MINE SITE Groundwater Investigation Community Meeting January 31, 2013. Agenda. Anaconda Yerington Mine Site Operable Units. Site-wide Groundwater (OU-1) Introduction. Site-wide Groundwater (OU1). Purpose of tonight’s meeting Respond to community request for more information - PowerPoint PPT PresentationTRANSCRIPT
ANACONDA MINE SITEGroundwater Investigation Community MeetingJanuary 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division1
Agenda
Topic Presenter(s)Welcome and Introductions David Seter (EPA)
Groundwater Introduction Jere Johnson (EPA)
Groundwater Technical Presentation Greg Davis (Brown and Caldwell)
Groundwater Wrap-Up Jere Johnson (EPA)
Groundwater Q & A Jere Johnson (facilitator)Steven Acree (EPA)Robert Ford (EPA)Greg Davis (Brown and Caldwell)
Brief Process Areas Workplan Overview Jere Johnson (EPA)
Open Forum David Seter (facilitator)
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 2
Anaconda Yerington Mine Site
Operable Units
January 31, 2013 U.S. Environmental Protection AgencyRegion 9 Superfund Division
3
Site-wide Groundwater (OU-1) Introduction
U.S. Environmental Protection AgencyRegion 9
Superfund DivisionJanuary 31, 2013
Site-wide Groundwater (OU1)
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 5
Purpose of tonight’s meetingo Respond to community request for more
informationo Describe work accomplished in last three yearso Present an overview of current groundwater
conditionso Describe remaining data gaps and Remedial
Investigation workplan designed to fill those gaps
EPA Superfund Investigation and Remediation Process Highlights
• Discovery of Contaminated Site• Preliminary Assessment/Site Inspection• Remedial Investigation/Feasibility Study• Record of Decision• Remedial Design/Remedial Action• Site Reuse/Redevelopment
U.S. Environmental Protection AgencyRegion 9
Superfund DivisionJanuary 31, 2013
Site-wide Groundwater (OU1)
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 7
Remedial Investigation workplan submitted by Atlantic Richfield is the plan to complete the data gathering necessary to identify and evaluate options for remediation in the Feasibility Study
Site-wide Groundwater (OU1)
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 8
Data gathered in last three years have provided a much better picture of groundwater flow and horizontal and vertical extent of contaminationo Characterization of off-site chemical concentrations in the
deep portions of the aquifer and in the north/northeast portion of the site
o Characterization of on-site chemical concentrations to better determine the most significant source areas
o Better understanding of groundwater flow, especially deep flow, and the influence of high capacity wells
Site-wide Groundwater (OU1)
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 9
Now have robust network of wells to provide information and monitor concentration and movement of contaminantso Monitoring network expanded from approximately 110 wells
to over 300 wellso Monitoring network includes wells of the Yerington Paiute
Tribeo Wells are sampled/monitored quarterly
Site-wide Groundwater (OU-1) Brown and Caldwell Presentation
U.S. Environmental Protection AgencyRegion 9
Superfund DivisionJanuary 31, 2013
Site-wide Groundwater (OU-1) Wrap-Up
U.S. Environmental Protection AgencyRegion 9
Superfund DivisionJanuary 31, 2013
Site-wide Groundwater (OU1)
January 31, 2013 12
Background Characterizationo Background Groundwater Quality Assessment - Revision 1 (Submitted)o Evaluation of Tracer Data (Estimated Completion Date: June 2013)o Background Work Plan (Estimated Submittal Date: December 2013)
Chemical Transporto Aquifer Solids Testing Work Plan (Approved)o Objectives for Groundwater Flow Modeling (Approved)o Groundwater Flow Model Work Plan (Submitted)o Additional Characterization Activities (Estimated for June – December 2013)
Bedrock Characterizationo Initial Bedrock Characterization Work Plan (Approved)o Implementation (Estimated Completion Date: June 2013)o Data Summary Report (Estimated Completion Date: September 2013)o Bedrock Work Plan (Estimated Submittal Date: December 2013)
Agricultural Assessment
January 31, 2013 13
Groundwater (OU1) Investigationo Effects of agricultural pumping on groundwater/chemical movemento Effects of irrigation application on groundwater/chemical movemento Effects of use of fertilizers, etc. on groundwater chemistry
Wabuska Drain (OU7) Investigation (Scoping planned soon)o Effects of sediment deposition on land adjacent to Draino Effects of surface water/localized groundwater on land adjacent to Drain
Human Health Risk Assessmentso Evaluation of pathways for exposure to site-related contaminationo Evaluation of impacts on agricultural products affected by completed
pathwayso Evaluation of human health impacts from exposure to affected agricultural
products
Site-wide Groundwater (OU1)
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 14
Schedule for Review of Remedial Investigation Workplan
Draft Workplan Submitted November 20, 2012
Review Period November 20, 2012 to February 15, 2013
Groundwater Community Meeting January 31, 2013
Comments Due February 15, 2013
Comment Review Meeting March 5, 2013 to March 7, 2013
Site-wide Groundwater (OU-1) Q & A
U.S. Environmental Protection AgencyRegion 9
Superfund DivisionJanuary 31, 2013
Process Areas (OU-3) Workplan Overview
U.S. Environmental Protection AgencyRegion 9
Superfund DivisionJanuary 31, 2013
Process Areas (OU3) Workplan
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 17
Schedule for Review of Process Areas Workplan
Workplan Released November 9, 2012
Review Period November 9, 2012 to February 1, 2013
Comments Due February 1, 2013
Comment Review Meeting February 20 – 21, 2013Hyatt Place, Reno
Process Areas (OU3) Workplan
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 18
Designed to characterize contamination in soil from surface to water tableo What contaminants are in the soil and at what levels?o What are the potential past and current contributions to
groundwater contamination?o How and where are the contaminants moving?o What are the risks to human health and the
environment?o What options are available for cleanup?
Process Areas (OU3) Workplan
January 31, 2013
U.S. Environmental Protection AgencyRegion 9
Superfund Division 19
Builds on data from previous characterizationso Areas with known occurrences of mine-related chemicalso Areas where concentrations of contaminants increase
with deptho Areas where concentrations of contaminants exceed
background or screening levelso Areas which have not been adequately characterized or
have not been investigated previously
OU3 WorkplanExample
Sub-Area 3Proposed Soil
Sample Locations
January 31, 2013 20
Open Forum
U.S. Environmental Protection AgencyRegion 9
Superfund DivisionJanuary 31, 2013
EPA Project TeamName Title Phone
NumberEmail
Grace Ma Community Involvement Coordinator 415-947-4212 [email protected]
Jere Johnson Remedial Project Manager• Site-Wide Groundwater (OU1)• Process Area (OU3)• Evaporation Ponds and Sulfide Tailings (OU4)
415-972-3094 [email protected]
David Seter Remedial Project Manager• Domestic Well Monitoring (OU1)• Wabuska Drain (OU7)• Arimetco (OU8)
415-972-3250 [email protected]
Tom Dunkelman
On-Scene Coordinator• Emergency Response and Removal Actions
775-687-9480 [email protected]
January 31, 2013U.S. Environmental Protection Agency
Region 9 Superfund Division
22
EPA Project Management Assignments
January 31, 2013U.S. Environmental Protection Agency
Region 9 Superfund Division
23
Operable Unit Description Remedial Project Manager
OU1 Groundwater
Remedial Investigation Jere JohnsonPumpback Well System David SeterDomestic Well Monitoring Program David Seter
OU2 Pit Lake Remedial Investigation Jere JohnsonOU3 Process Area Remedial Investigation Jere Johnson
OU4 Evaporation Ponds/Sulfide Tailings
Remedial Investigation Jere JohnsonEvaporation Ponds Removal Action Jere Johnson
OU5 Waste Rock Area Remedial Investigation Jere JohnsonOU6 Oxide Tailings Remedial Investigation Jere JohnsonOU7 Wabuska Drain Remedial Investigation David SeterOU8 Arimetco Remedial Investigation/Feasibility Study David SeterAll EPA Removal Actions Tom DunkelmanAll Community Involvement Grace Ma