CLEA UK software introduction
The publication of the CLEA 2002 software and its associated documentation (CLR7-10) was a key step in the programme to develop a consistent, scientifically
based framework for assessing risks to human health from land contamination.
The CLEA 2002 software was designed to conduct generic risk assessment, for a limited number of contaminants, where human activity patterns and contaminant
characteristics conform to a set of broadly drawn general scenarios. The benefit of providing practitioners with a more powerful tool able to derive site-specific
assessment criteria for those cases where the conceptual model for a site does not fit that of the generic scenario has been recognised. In addition, the approach
to deriving Soil Guideline Values had been updated since the release of CLEA 2002 as discussed in CLEA Briefing Notes 1, 2, 3 and 4. The Environment Agency is now
issuing a publicly available version of the CLEA software that incorporates these updates.
The new software ‘CLEA UK’ will allow practitioners to derive generic assessment criteria, derive site-specific assessment criteria and calculate average
daily exposure/health criteria ratios using a methodology that is consistent with current government policy on contaminated land. Additionally, assessment
criteria can be derived for contaminants for which no government approved Health Criteria Values or Soil Guideline Values are available.
'CLEA UK' Beta Version 1.0 is now available for Microsoft Excel 97 for user evaluation and comment. A final version incorporating recommendations identified
from feedback will be available approximately six months after release.
The software has been tested for a limited range of chemicals and scenarios. Therefore, it is recommended that it is used cautiously when applying it to user
created chemicals and scenarios until the final version is released.
Links to the software and guidance documentation can be found at http://www.environment-agency.gov.uk/sub ...
The four briefing notes can be accessed at: http://www.environment-agency.gov.uk/sub ...