Addressing Threats from Addressing Threats from Abandoned Mines in - PowerPoint PPT Presentation

Addressing Threats from Addressing Threats from Abandoned Mines in California Abandoned Mines in California Communities Communities Jackson, Amador County Randy Adams, C.E.G. Randy Adams, C.E.G. California Environmental Protection Agency California Environmental Protection Agency Department of Toxic Substances Control (DTSC) (DTSC) Department of Toxic Substances Control November 2009 November 2009

Introduction Introduction 47,000 Abandoned 47,000 Abandoned Mines in California Mines in California estimated by estimated by Department of Department of Conservation. Conservation. Abandoned Mine Abandoned Mine Lands (AML) or Mine Lands (AML) or Mine Scarred Lands are Scarred Lands are Brownfields Brownfields

Addressing Threats from Abandoned Mines Addressing Threats from Abandoned Mines in California Communities in California Communities Discussion Topics � Mine Waste Chemicals of Concern (COC) Mine Waste Chemicals of Concern (COC) � � Human Exposure to Toxic Substances Human Exposure to Toxic Substances � � Environmental Impacts on Water Quality and Biota Environmental Impacts on Water Quality and Biota � � Abandoned Mine Lands as Brownfields in California Abandoned Mine Lands as Brownfields in California � – Current Issues Current Issues – – Approaches/ Solutions Approaches/ Solutions – � DTSC AML Programs DTSC AML Programs � � DTSC approaches to human health exposure in DTSC approaches to human health exposure in � mining communities: mining communities: – Community – Community- - Wide Assessment Grant Jackson/ Sutter Creek Wide Assessment Grant Jackson/ Sutter Creek – Training Research and Technical Assistance Grant: California Training Research and Technical Assistance Grant: California – Mine Scarred Lands Project (Arsenic Bioavailability Grant) Mine Scarred Lands Project (Arsenic Bioavailability Grant)

Mine Waste Chemicals of Concern Mine Waste Chemicals of Concern Types of Mine Types of Mine Wastes Wastes � Mine Waste Rock Mine Waste Rock � Jamison Creek, Plumas County � Mill Tailings Mill Tailings � � Acid Mine Drainage (AMD) Acid Mine Drainage (AMD) � � Processing Chemicals Processing Chemicals � � Most common COC for Gold Mines: Arsenic, Most common COC for Gold Mines: Arsenic, � Mercury, and Lead Mercury, and Lead

Human Exposure to Toxic Human Exposure to Toxic Substances Substances Mesa De Oro, Sutter Creek, Amador County

Human Exposure to Toxic Human Exposure to Toxic Substances Substances Assessing risk due to mine waste Assessing risk due to mine waste � Toxicity of COC Toxicity of COC � � Concentration of COC Concentration of COC � � Particle size and solubility Particle size and solubility � � Frequency and duration of exposure (land uses) Frequency and duration of exposure (land uses) � � Media Media - - (water, soil, air) (water, soil, air) � � Route of exposure Route of exposure – – (ingestion, inhalation, dermal) (ingestion, inhalation, dermal) � � Sensitivity of person exposed Sensitivity of person exposed – –(child, pregnant (child, pregnant � women) women) � Potential for bioaccumulation Potential for bioaccumulation �

Environmental Impacts on Environmental Impacts on Water Quality and Biota Water Quality and Biota Copper Creek, Copperopolis, Calaveras County

Environmental Impacts on Environmental Impacts on Water Quality and Biota Water Quality and Biota Iron Mountain Mine, Shasta County Biota Biota Impacts Impacts � Harmful to plants and animals, particularly fish and Harmful to plants and animals, particularly fish and � other aquatic organisms other aquatic organisms � Concentration and toxicity thresholds for animals Concentration and toxicity thresholds for animals � are often lower than for humans are often lower than for humans � Effects to biota are often acute (fish kills) Effects to biota are often acute (fish kills) � � Effects to plants are long lasting (barren hill sides) Effects to plants are long lasting (barren hill sides) �

Environmental Impacts on Environmental Impacts on Water Quality and Biota Water Quality and Biota Water Water Treatment Plant Quality Quality Impacts & Impacts & Solutions Solutions Water Diversion � Surface water Surface water – – AMD and dissolved/ suspended metals AMD and dissolved/ suspended metals � (including mercury and methyl- - mercury) mercury) (including mercury and methyl � Potential threats to groundwater Potential threats to groundwater – – dissolved metals dissolved metals � � Major impacts were identified early in California Major impacts were identified early in California � � Solution Solution- - Water diversion and large scale treatment Water diversion and large scale treatment � systems systems

Abandoned Mine Lands as Abandoned Mine Lands as Brownfields in California Brownfields in California Current Issues Current Issues Development within Historical Mining Communities Development within Historical Mining Communities � � - Jackson and Sutter Creek, Amador County Jackson and Sutter Creek, Amador County - - Nevada City and Grass Valley, Nevada County Nevada City and Grass Valley, Nevada County - - Infrastructure and Public Property Infrastructure and Public Property - Increased Recreational Land Uses Increased Recreational Land Uses � � - National & State Parks National & State Parks - Central Eureka Mine - Local Agencies Local Agencies - Sutter Creek Tribal Land Uses Tribal Land Uses � � - Cultural/ Ceremonial Cultural/ Ceremonial -

Abandoned Mine Lands as Abandoned Mine Lands as Brownfields in California Brownfields in California Approaches/ Solutions Approaches/ Solutions � Collaboration with state, federal, and local Collaboration with state, federal, and local � agencies; tribal governments; universities; agencies; tribal governments; universities; non- - profit organizations; and private parties profit organizations; and private parties non � California Abandoned Mine Lands Agency Group California Abandoned Mine Lands Agency Group � and Abandoned Mine Lands Forum and Abandoned Mine Lands Forum � Abandoned Mine Lands Priority List Abandoned Mine Lands Priority List � � Memorandum of Understanding Memorandum of Understanding - - State/ Federal State/ Federal � Land Management Agencies (in progress) Land Management Agencies (in progress)

Abandoned Mine Lands as Abandoned Mine Lands as Brownfields in California Brownfields in California Approaches/ Solutions (Continued) Approaches/ Solutions (Continued) � Memorandum of Agreement Memorandum of Agreement - - DTSC/ California DTSC/ California � Regional Water Quality Control Boards Regional Water Quality Control Boards � Brownfields and other grant applications Brownfields and other grant applications � � Letter of Intent Letter of Intent - - Tribes/ DTSC (Cache Creek Tribes/ DTSC (Cache Creek � Watershed) Watershed) Picacho State Recreation Area, Imperial County � DTSC AML Initiative DTSC AML Initiative � Team Team

Abandoned Mine Lands as Abandoned Mine Lands as Brownfields in California Brownfields in California Copperopolis, Calaveras County DTSC AML Programs DTSC AML Programs � Voluntary Cleanup Program Voluntary Cleanup Program � � State Orphan Sites State Orphan Sites � � Orders Orders � � National Priorities List (NPL) Sites with National Priorities List (NPL) Sites with � U.S. Environmental Protection Agency (USEPA) U.S. Environmental Protection Agency (USEPA) � Preliminary Assessment/ Site Investigation via Preliminary Assessment/ Site Investigation via � USEPA USEPA � Targeted Site Investigation via USEPA Targeted Site Investigation via USEPA �

Abandoned Mine Lands as Abandoned Mine Lands as Brownfields in California Brownfields in California Two examples of approaches DTSC is taking in Two examples of approaches DTSC is taking in addressing the problem of human health addressing the problem of human health exposure in mining communities: exposure in mining communities: � USEPA Brownfields Community USEPA Brownfields Community- - Wide Wide � Assessment Grant: Jackson/ Sutter Creek Assessment Grant: Jackson/ Sutter Creek � USEPA Brownfields Training Research and USEPA Brownfields Training Research and � Technical Assistance Grant: California Mine Technical Assistance Grant: California Mine Scarred Lands Project (Arsenic Bioavailability Scarred Lands Project (Arsenic Bioavailability Grant) Grant)

Community- -Wide Assessment Wide Assessment Community Jackson/Sutter Creek, Amador County Jackson/Sutter Creek, Amador County Kennedy Mine Sutter Creek Scope of Scope of Project Project � Assess public lands and high priority Assess public lands and high priority � development sites development sites – Public lands: schools, parks, roads, storm drain Public lands: schools, parks, roads, storm drain – systems, and other public property systems, and other public property – Private: sites where development is encroaching Private: sites where development is encroaching –

Jackson/ Sutter Creek Mapping to date with abandoned mine sites, including public land and private land locations