Grzegorz (Greg) MALINA

Transcription

1 INTERNATIONAL WORKSHOP FATE AND IMPACT OF PERSISTENT POLLUTANTS IN AGROECOSYSTEMS Institute of Soil Science and Plant Cultivation (IUNG) Puławy, Poland March 2005 RISK - BASED INTEGRATED MANAGEMENT STRATEGY FOR MEGASITES CONTAMINATED WITH HEAVY METALS AND POP's: The lesson learnt from the EU Welcome Project Grzegorz (Greg) MALINA Water, Environment, Landscape Management at Contaminated Megasite WELCOME 5 FP EU EVK1-CT

2 Acknowledgement Janusz Krupanek IETU, PL Huub H. M. Rijnaarts, TNO-MEP, NL The other WELCOME partners not mentioned by name who have given any input are kindly acknowledged

3 The Integrated Management Strategy (IMS): Approach Data management Tools - models 2.3 Clustering Modelling 2.4 Determining Risk 2.2 Risk assessment Finalize clustering Megasite characterisation Organasing Boundary Inventory of Building a Decision on Problem stake- conditions information conceptual IMS definition holders model Management Monitoring Review plan program process 4.4 Continuous update megasite databases Starting IMS Implementation Basic scenarios Preferred scenarios Risk management scenarios Potential scenarios 3.2 Stakeholders Experts

4 Megasite Main definitions area with multiple contaminants sources related to (former) industrial activities, with considerable impact on the environment, though groundwater, surface water and/or air migration Risk Management Zone zone around megasite with an actual or potential impact of contaminants towards receptors, providing space and time to manage the risks for the receptors in a cost-efficient way Risk Cluster zone in which the risks can be manage in a defined way Plane of Compliance horizontal or vertical border, at which certain concentration or mass flux have to be achieved, to comply with site-specific threshold values

5 IMS: Risk Assessment

6 IMS: Risk Management Scenarios

7 IMS: Implementation

8 The IMS: Tarnowskie Góry megasite Problem at TG megasite Organizing stakeholders at TG megasite Building the conceptual model for TG megasite Clusters at TG megasite Final clustering at TG megasite Basic scenarios for TG meagsite Potential scenarios for TG megasite

9 Problem: current distribution in the Triassic aquifers

10 Stakeholders at TG megasite

11 CM model: potential sources & contaminants

12 CM model: dominant fate & transport pathways

13 CM model: potential receptors

14 Clusters

15 Finalize clustering & risk reduction goals Cluster I Short-term elimination of health risks from contaminated soil & surface water; no need for further remediation besides established (chemical plant liquidation program), no need for other management goals Cluster IIa Short-term contamination reduction in Q-gw (control of secondary contamination source); short-term reduction of contamination fluxes to cluster IIb (plume control/containment); long-term remediation of Tr-gw Cluster IIb Short-term risk elimination for operating wells; short-term inversion of gw quality deterioration trends ( reversal trends ); long-term water quality improvement within RMZ until status of good quality reached Cluster III Short-term contamination fluxes reduction in Tr-gw (between levels I & II)

16 Basic scenarios revision of boundary conditions

17 S1: controlled NA (source removal + monitoring & control of hydrological regime

18 S2: active groundwater remediation (source removal + groundwater clean-up + monitoring

19 S3 - engineered NA: source removal + increased extraction of GW (specific & low-risk oriented) within the RMZ + monitoring

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