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h3. |
Good
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data
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as
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a
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basis
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for
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decision-making
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The
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three
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objectives
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of
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the
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inventory
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of
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information
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on
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the
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site
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of
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concern
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are:
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- Gathering
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- all
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- existing
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- data
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- needed
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- for
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- the
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- construction
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- of
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- a
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- conceptual
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- model
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- of
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- the
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- site.
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- Identifying
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- data
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- gaps
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- and
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- determining
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- the
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- need
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- for
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- additional
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- investigations
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- at
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- screening
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- level.
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- Setting
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- up
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- a
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- data
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- management
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- system,
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- which
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- will
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- be
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- needed
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- in
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- risk-assessment
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- and
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- scenario
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- development.
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The
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inventory
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should
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provide
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a
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basis
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for
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the
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preliminary
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determination
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of
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the
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area
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to
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be
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assessed
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and
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the
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description
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of
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its
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relevant
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properties,
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which
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are
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defined
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by:
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- contaminant
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- sources,
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- receptors
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- inside
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- and
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- outside
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- the
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- megasite,
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- pathways,
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- through
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- which
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- contaminant
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- transport
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- from
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- sources
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- to
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- receptors
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- occurs.
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At
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this
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stage
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of
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the
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Integrated
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Management
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Strategy
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(IMS)
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one
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should
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focus
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on
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the
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crucial
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data
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needed
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for
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the
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initial
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site
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characterization.
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An
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important
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part
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of
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this
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knowledge
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is
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likely
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to
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be
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gained
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from
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expert
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judgment,
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in
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addition
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to
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available
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databases
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and
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data
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files.
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Simultaneously,
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an
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overview
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of
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the
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data
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sources
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that
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are
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needed
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in
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the
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risk
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assessment
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has
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to
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be
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made.
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Special
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attention
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should
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be
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paid
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to
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the
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identification
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of
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the
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critical
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data
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gaps
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that
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are
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expected.
...
After the inventory of data sources and gathering the right information is completed, the challenge is to manage, store and query the data and information. Therefore, it is important to choose the right database system and software as a basis for recording and processing all information. Beside the database system, it is recommended to start to develop a database in a form that can be easily used for the geographical information systems (GIS) and groundwater models that will be needed further along in the IMS process for the risk assessment and management scenarios.
The first description of the contamination situation as well as the site-specific conditions may already confirm the assumption made that one is dealing with a megasite. In that case, a risk-based approach might be required to provide for a reasonable management of the megasite.
Output
The output of the inventory can be the site information displayed in maps or tables. A data management system should be developed to optimally store and process existing and additionally gained data. Based on the inventory, it can already be determined whether or not the site of concern meets the criteria for definition as a megasite and whether or not an integrated risk based approach is likely to be the best way to deal with the environmental problems.
