Simplified Volume Estimation Techniques For
Contaminated Land Remediation: A UK Example
Author(s)
N. Cropp, E. Hellawell & R. Woods
Abstract
The need for contaminated land assessment is increasing in the UK as
Brownfield sites are being targeted for development. For sites that are deemed
to be contaminated, the practical application of a remediation strategy often leads
to approximations of volumes of material to be treated. The extent of
contamination on the site is assessed based on a limited number of data points
within a defined area. At each data point the level of contamination is known for
a given sample depth. In the UK a risk based approach is used to determine
whether the soil is ‘contaminated’ and in need of treatment. In a commercial
context, time and cost pressures lead to simplifications of the volume estimation
process. These simplifications must strike a balance between the environmental
risk from underestimates of the contaminated volume and the cost of wasted
resources associated with overestimates. This paper presents a comparison
between three practical estimation techniques used to assess the volume of
‘contaminated’ soil on a development site, formerly a gas works. The methods
used are; areas of influence, proportional method and interpolation using
Kriging. All techniques were found to have a useful application although the
limitations of each must be recognised. There is inevitable uncertainty
associated with the simplification of any practical situation. In comparing these
methods the main uncertainties are identified and management approaches
discussed.
Keywords: volume estimation, contaminated soil.
1 Introduction
In the UK the previously developed land (PDL), also referred to as Brownfield
land, is being targeted for development. The government have set a target of
Keywords
volume estimation, contaminated soil.
Related Book
Other papers in this volume
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