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Environmental risk assessment policy and developments in the Netherlands. G erard Harmsen Institute for Inland Watermanagement and Waste Water Treatment (RIZA) Ministry of Transport, Public Works and Water Management. Overview. Accidents and follow up Focus on surface water

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Environmental risk assessment policy and developments in the netherlands

Environmental risk assessment policy and developmentsin the Netherlands

Gerard Harmsen

Institute for Inland Watermanagement and Waste Water Treatment

(RIZA)

Ministry of Transport, Public Works and Water Management

Seminar CCA Seveso Matalascañas april 2002


Overview
Overview

  • Accidents and follow up

  • Focus on surface water

  • Risk assessment developments

  • Proteus software

  • criteria for environmental risk

Seminar CCA Seveso Matalascañas april 2002


Accidents
Accidents

  • Sandoz

  • Several yearly unforeseen discharges

Seminar CCA Seveso Matalascañas april 2002


Risk management

Risk identification

Risk assessment

Risk criteria

Control measures

Risk management

Enforcement

Seminar CCA Seveso Matalascañas april 2002


Why focus on surface water risks
Why focus on surface waterrisks

  • spills lead directly to consequences for the environment

  • pollution disperses rapidly

  • many establishments are located near surface water

Seminar CCA Seveso Matalascañas april 2002


Seveso sites at surface water
Seveso sites at surface water

~ 50% of the article 9 sites

are at surface water

Seminar CCA Seveso Matalascañas april 2002


What can cause surface water risks
What can cause surface water risks

e.g.

  • Chemicals & pesticides storages fire

  • petroleum products storages leakages

  • unloading spills without bunds

  • process upsets/LOCs

  • waste water treatment

Seminar CCA Seveso Matalascañas april 2002


Policy

Implementation of “Best safety practice”

Modelling of remaining risk

Reviewing of the calculated risks

Policy

Seminar CCA Seveso Matalascañas april 2002


Best safety practice
“Best safety practice”

  • Prevention

  • Precautionary principle

  • like the approach for regular discharges

Seminar CCA Seveso Matalascañas april 2002


Avoiding surface water risks
Avoiding surface water risks

  • design & maintenance

  • process control

  • avoid leakages (tanks, unloading)

  • closed bunds

  • sewerage systems

  • safe storage

  • early fire alarm

  • catchment basin

  • waste water treatment

Seminar CCA Seveso Matalascañas april 2002


Example safe storage of chemicals
Example Safe storage of chemicals

  • compartments

  • separation

    • flammable from toxic

    • oxidizers, acids, reacting

    • (in) compatibility lists

  • early fire detect and intervention (sprinklers)

  • foam vs. water

  • fire water catchment

Seminar CCA Seveso Matalascañas april 2002


Report best safety practice
Report “Best safety practice”

  • general procedures and facilities

  • specific activities:

    • bulk transfer

    • batch processes

    • storage

  • type of activity, nature of risks, description of best practice, references

Seminar CCA Seveso Matalascañas april 2002


Policy1

“Best safety practice”

Modelling of remaining risks

reviewing of the calculated risks

Policy

Seminar CCA Seveso Matalascañas april 2002


Elements of risk assessment for surface water
Elements of risk assessment for surface water

  • chemicals toxicity etc.

  • presence and use in the establishment

  • possible spill pathways

  • safety management influence

  • safety measures

  • type of surface water

Seminar CCA Seveso Matalascañas april 2002


Model for aquatic risk assessment
Model for aquatic risk assessment

PROTEUS

  • safety management influence

  • type of surface water

  • absolute risks

  • only applicable on inland water

Seminar CCA Seveso Matalascañas april 2002


Proteus (basic)

Overflow

Primary containment

Buffering

Drain

Seminar CCA Seveso Matalascañas april 2002


initialQMFT

*

*

*

management

generic

QMFT

technical

performance

Proteus (risk calculation)

Seminar CCA Seveso Matalascañas april 2002


Management
management

  • Areas of influence

    • safety management systems

    • skills of operators

    • working procedures

    • efficiency of repression

    • distinctive characterisations

Seminar CCA Seveso Matalascañas april 2002


risk

discharge

*

initialQMFT

catchmentand

treatment

Proteus (risk calculation)

specific

conditions

Seminar CCA Seveso Matalascañas april 2002


Effect calculation
Effect calculation

  • surface water

    • toxicity, deoxygenation, formation of floting layers

    • modelling watersystems

      • conservative behaviour of substances

      • concentrationcalculations on Gausses dispersion equation

  • Communal waste water treatment

    • overloading and inhibition

Seminar CCA Seveso Matalascañas april 2002


Proteus results
Proteus (results)

  • frequency-consequence curves

    • volume contaminated surface water

    • failure of communal waste water treatment

    • quantity of fire extinguish water

  • automatically generated report

Seminar CCA Seveso Matalascañas april 2002


Proteus (results)

frequency

consequence

Seminar CCA Seveso Matalascañas april 2002


Proteus
Proteus

  • windows application (3.11, 95, 98)

  • database properties chemicals (serida)

  • default values standerd scenarios

  • free off charge

  • Update end of 2002

Seminar CCA Seveso Matalascañas april 2002


Policy2

“Best safety practice”

Modelling of remaining risks

reviewing of the calculated risks

Policy

Seminar CCA Seveso Matalascañas april 2002


Environmental harm index
Environmental Harm Index

  • EHI = (Vow/Vref) * Fws

  • EHI = Environmental Harm Index

  • Vow = volume contaminated surface water

  • Vref = referentievolume (based on Sandoz)

  • Fws = correction factor for vunerability of the surface waters

Seminar CCA Seveso Matalascañas april 2002


Proteus (results)

frequency

consequence

Seminar CCA Seveso Matalascañas april 2002


Proteus evaluation a proposal
Proteus (evaluation)a proposal

Intolerable

Acceptable

Negligilble

Seminar CCA Seveso Matalascañas april 2002


Download from:

www.riskanalysis.nl/proteus

published in:

J.Hazardous materials 61 p.371-374 (2000)

G.J. Stam, P.H. Bottelberghs, J.G. Post, H.G. Bos “Environmental risk: towards an integrated assessment of industrial activities”

[email protected]

Seminar CCA Seveso Matalascañas april 2002


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