Chapter 6.8 Site selection for hazardous waste treatment facilities - PowerPoint PPT Presentation

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Chapter 6.8 Site selection for hazardous waste treatment facilities

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Chapter 6.8 Site selection for hazardous waste treatment facilities Site selection and the planning process Broad considerations for site selection Public resistance ... – PowerPoint PPT presentation

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Title: Chapter 6.8 Site selection for hazardous waste treatment facilities


1
Chapter 6.8Site selection for hazardous waste
treatment facilities
2
Site selection and the planning process
National strategy Regional strategy Action
Plan
To establish need for one or more facilities
Site selection
Environmental impact assessment (EIA) Feasibility
study
3
Broad considerations for site selection
  • Requires systematic screening to address
  • Technical and scientific aspects eg
  • geological
  • environmental
  • engineering
  • Economic issues
  • Regulatory factors
  • Public acceptance
  • Siting is not exclusively a technical challenge

4
Public resistance to site selection
  • Public is generally concerned about hazardous
    waste.
  • Other specific concerns
  • Past experience
  • Anxiety about health environmental impacts
  • Low confidence in science and technology
  • Mistrust of outsiders
  • Lack of trust in regulatory agencies
  • Concern about effects on quality of life
  • NIMBY

5
Public participation
  • Aims to
  • Promote public awareness of waste management
    situation in general, hazardous waste in
    particular
  • Promote public understanding of the need for this
    facility
  • Inform the public of the stages for this project
  • Communicate with the public to get their views
  • Sucessful siting should
  • - be understood and accepted by the public
  • - include opportunities for compensation where
    appropriate

6
Preliminary needs assessment
  • Amount of waste generated and any variations in
    quantity eg seasonal
  • Type of waste
  • Potential for reduction, recycling recovery
  • Imports and exports
  • Must take account of
  • data reliability
  • illegal disposal

7
Responsibility for site selection
  • Government
  • Waste management policy legislation
  • Planning Information to public
  • Regulatory authority
  • Licensing, inspection monitoring
  • Assess environmental and health impacts
  • Developer
  • Select acquire appropriate site
  • Select appropriate technology
  • Finance, design, build (and operate) facility
  • Local stakeholders must also be involved

8
Goals of site selection

Identification of a site which
  • is technically suitable
  • minimises health risks
  • minimises environmental impacts
  • maximises public acceptability
  • minimises costs

9
Different approaches to site selection
  • Voluntary approach - where communities compete to
    host facility
  • Participative or technical approach - where
    informed decision is reached on best site,
    despite community resistance

10
Voluntary approach
  • Starts with assumption that one or more
    communities will accept facility - consultation
    begins early
  • Public local government are informed of
    objectives
  • Detailed discussion of project with regional
    planners, local government and interest groups
  • Overview study of potential sites - results
    published
  • Candidate sites identified and discussed -
    citizens committees formed
  • Detailed exploration of specific sites conducted
    - results published
  • One site is selected
  • The process of securing final approval begins

11
Participative (technical) approach
Starts by identifying a number of potentially
suitable sites before involving the public
  • Screening and exclusionary criteria formulated
  • Candidate areas chosen, unsuitable areas
    eliminated, by large-area mapping (scale
    1250,000)
  • Promising areas identified with larger scale maps
    (1 25,000)
  • Screening criteria used to evaluate potential
    host areas
  • Candidate sites chosen
  • Preferred sites chosen and studied
  • One site selected
  • Process of securing final approval begins

12
Stages in the process
  • Constraint mapping
  • Information sources
  • Exclusion criteria
  • Walk-over surveys
  • Conceptual designs
  • Preferred site investigation
  • Feasibility studies
  • Environmental impact assessment (EIA)

13
Constraint mapping

Siting criteria include Physical constraints eg
soils, surface water, stability Ecological
constraints eg flora fauna Human values eg
recreation, landscape Land use eg agricultural
value, development potential Waste disposal
suitability eg access, proximity to waste
generators
14
Information sources
  • Data sources for desk-based screening include
  • Cartographic authority
  • Government transport and land planning
    departments
  • Water supply authority
  • Geological institutes
  • Aviation authority
  • Hydrology and meteorology institutes
  • Government ministries
  • Municipalities

15
Exclusion criteria
  • Used to remove possible sites from long list
  • Examples - exclude from list if
  • gt2km from public highway
  • located on river flood plain
  • land reserved for other uses
  • lt200m from residences
  • lt5km from airport
  • inside microwave transmitter exclusion zone
  • located on active geological fault

16
Walk-over surveys
  • Essential part of process
  • Enable more realistic assessment of site
    conditions
  • Take less than a day
  • Do not involve sub-surface investigation
  • Data is recorded eg on checklist

17
Conceptual designs
  • Must be developed for each short-listed candidate
    site
  • Outline drawings only
  • Used for estimating
  • capacity
  • costs
  • extent of engineering work needed
  • impact on waste collection system
  • any likely additional resources eg vehicles,
    transfer stations

18
Preferred site investigation
  • Issues to be investigated
  • Geo-technical conditions including seismic and
    slope stability
  • Topographic land survey
  • Groundwater and surface water quality and levels
  • Geological and geo-chemical conditions for
    foundation engineering and earthworks
  • Quantities of soil to be moved
  • Natural ecology
  • Ambient noise levels

19
Feasibility report
Feasibility report starts with description of
site selection process Demonstrates suitability
of site and chosen technology regarding
  • physical natural environment (see also
    Environmental Impact Assessment)
  • technical appropriateness
  • economic justification and viability
  • social acceptability
  • legal compliance

20
Environmental Impact Assessment
EIA is used to Identify which activities likely
to give rise to significant adverse
impacts Prompts appropriate mitigation
measures OR rejection of site
21
Chapter 6.8 Summary
  • Site selection comprises
  • Technical and scientific aspects
  • Economic issues
  • Regulatory factors
  • Public acceptance
  • Siting is not exclusively a technical challenge
  • Responsibility is shared government, regulatory
    authority, developer, other stakeholders
  • It should be a staged process
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