soil and groundwater remediation guidelines 2009

Download Soil and Groundwater Remediation Guidelines 2009

Post on 10-Sep-2015

42 views

Category:

Documents

1 download

Embed Size (px)

DESCRIPTION

Manual Book

TRANSCRIPT

  • ALBERTA TIER 2 SOIL AND GROUNDWATER REMEDIATION GUIDELINES

  • ALBERTA TIER 2 SOIL AND GROUNDWATER REMEDIATION GUIDELINES

    Alberta Environment

    February 2009

  • ISBN: 978-0-7785-7593-1 (Printed Edition) ISBN: 978-0-7785-7594-8 (On-line Edition) Web Site: http://environment.gov.ab.ca/info Alberta Tier 2 Soil and Groundwater Remediation Guidelines

    Any comments, questions or suggestions regarding the content of this document may be directed to: Climate Change, Air, and Land Policy Branch Environmental Assurance Division Alberta Environment 10th Floor, Oxbridge Place 9820 106 Street Edmonton, Alberta T5K 2J6 Fax: (780) 422-4192 Additional copies of this document may be obtained by contacting: Information Centre Alberta Environment Main Floor, Oxbridge Place 9820 106 Street Edmonton, Alberta T5K 2J6 Phone: (780) 427-2700 Fax: (780) 422-4086 Email: env.infocent@gov.ab.ca

  • i

    TABLE OF CONTENTS PART A: OVERVIEW OF ALBERTA GUIDELINES AND IMPLEMENTATION

    FRAMEWORK .............................................................................................................1

    1. INTRODUCTION ....................................................................................................................1

    1.1 Albertas Framework for the Management of Contaminated Sites ..............................1

    1.2 Tier 1 and Tier 2 Levels of Protection..........................................................................2

    1.3 Relationship to Other Guideline Documents................................................................2

    2. ALBERTA ENVIRONMENT POLICY ON CONTAMINATED SITE MANAGEMENT...4

    2.1 Pollution Prevention .....................................................................................................4

    2.2 Legislation ....................................................................................................................4 2.2.1 Environmental Protection and Enhancement Act........................................4 2.2.2 Water Act .....................................................................................................5

    2.3 Principles of Contaminant Management ......................................................................5 2.3.1 Source Control .............................................................................................5 2.3.2 Delineation...................................................................................................6 2.3.3 Contaminant Management ...........................................................................6 2.3.4 Management of Contaminants in Subsoil ....................................................7

    2.4 Soil Protection in Alberta .............................................................................................7 2.4.1 Using Tier 1 or Tier 2 Soil Remediation Objectives ...................................8 2.4.2 Background Soil Quality..............................................................................8 2.4.3 Land Use ......................................................................................................8 2.4.4 Relationship to Air and Water Quality ........................................................9 2.4.5 Relationship to Land Application of Organic Materials and Industrial

    By-Products................................................................................................10

    2.5 Groundwater Protection in Alberta.............................................................................11 2.5.1 Albertas Initiatives to Protect Water Resources .......................................11 2.5.2 Protection of Domestic Use Aquifers ........................................................12 2.5.3 Using Tier 2 Groundwater Remediation Guidelines .................................13 2.5.4 Background Groundwater Quality.............................................................13 2.5.5 Relationship to Soil, Air and Surface Water Quality Guidelines ..............13 2.5.6 Points of Compliance.................................................................................14 2.5.7 Risk Management ......................................................................................15

    3. ALBERTA FRAMEWORK FOR THE MANAGEMENT OF CONTAMINATED SITES 16

    3.1 Implementation Framework and Management Levels ...............................................16

    3.2 Land Use Definitions..................................................................................................18

    3.3 Groundwater and Surface Water Use Definitions ......................................................19

    3.4 Protection of Human Health and Ecological Receptors .............................................20 3.4.1 Protection of Human Health ......................................................................20 3.4.2 Ecological Protection .................................................................................21

  • ii

    3.4.3 Considerations other than toxicity .............................................................22

    3.5 Conditions and Restrictions Associated with Tier 2 and Exposure Control ..............23

    4. OVERVIEW OF TIER 2 MANAGEMENT ..........................................................................24

    4.1 Conditions Triggering Tier 2 ......................................................................................24

    4.2 Eligible Exposure Pathway/Receptor and Parameter Modifications for Tier 2 .........25 4.2.1 Pathways and receptor exclusion ...............................................................25 4.2.2 Guideline Adjustment ................................................................................26

    4.3 Exposure Pathway or Point-of-Exposure Measurements ...........................................27

    4.4 Tier 2 Assessment and Evaluation..............................................................................27 4.4.1 Additional data collection ..........................................................................27 4.4.2 Recalculation of objectives based on site-specific parameters ..................28

    4.5 Tier 2 Decision and Management...............................................................................28

    5. OVERVIEW OF TIER 2 SITE-SPECIFIC RISK ASSESSMENT OPTIONS......................29

    5.1 Conditions Triggering Site-specific Risk Assessment ...............................................29

    5.2 Basis and Considerations for SSRA ...........................................................................30 5.2.1 Pathways and receptors..............................................................................30 5.2.2 Parameters..................................................................................................30 5.2.3 Human Health and Ecological Protection Endpoints.................................30 5.2.4 Alternative Fate & Transport and Exposure Models .................................30

    5.3 Implementation of Site-specific Remediation Objectives ..........................................31 5.3.1 Data requirements ......................................................................................31 5.3.2 Principles of site-specific risk assessment .................................................32

    5.4 Identification of Conditions/Restrictions Associated with Site-Specific Risk Assessment .................................................................................................................34

    6. EXPOSURE CONTROL........................................................................................................36

    6.1 Role of Exposure Control ...........................................................................................36

    6.2 Approaches to Exposure Control................................................................................37 6.2.1 Administrative or institutional controls .....................................................38 6.2.2 Engineered or physical controls.................................................................38 6.2.3 Monitoring .................................................................................................39

    6.3 Circumstances that Preclude Exposure Control .........................................................39

    6.4 Requirements for Exposure Control ...........................................................................40

    PART B: USER GUIDANCE FOR TIER 2 MANAGEMENT UNDER THE PATHWAY EXCLUSION AND GUIDELINE ADJUSTMENT OPTIONS ...............................42

    1. INTRODUCTION ..................................................................................................................42

    2. CONDITIONS TRIGGERING TIER 2..................................................................................42

  • iii

    2.1 Conditions Precluding Use of Tier 1 Guidelines........................................................42

    2.2 Conditions for Tier 2 Guideline Adjustment ..............................................................43

    2.3 Conditions Precluding Implementation ......................................................................45

    3. ELIGIBLE MODIFICATIONS FOR TIER 2 GUIDELINE ADJUSTMENT ......................47

    3.1 Introduction.................................................................................................................47

    3.2 Exposure Pathways and Receptors .............................................................................47

    3.3 Parameters...................................................................................................................55

    3.4 Exposure Pathwa

Recommended

View more >