19-Jun-2006
- The Environment Agency has issued a revised
version of the Monitoring and Certification Scheme
(MCERTS) for the chemical testing of soils.
"There has been some uncertainty
within the industry regarding the use of appropriate
in-situ testing of soils and how this related
to MCERTS. This latest version of the policy clarifies
the Environment Agency's position," explained
Environment Agency Land Contamination Policy Advisor
Peter Ord.
"MCERTS for the chemical
testing of soils was introduced by the Environment
Agency to ensure high-quality and consistent environmental
measurements are used when evaluating and comparing
analytical data.
"Chemical testing of soil
is a critical component in producing defensible
data for regulatory purposes. However, measurements
may contain random and systematic errors and these
can vary greatly between laboratories. The levels
of competency of staff carrying out analytical
tests can also vary between one laboratory and
another.
"We need to be sure of
the quality of the analytical results received
so that we can use them with confidence to make
important regulatory decisions. MCERTS provides
formal accreditation of laboratories in accordance
with European and international standards."
Although only MCERTS-accredited
data can be used to support regulatory decisions,
such as EPA 90 Part II A (contaminated land) and
Pollution Prevention and Control site reports,
the Environment Agency recognises that appropriate
in-situ testing has an important supporting role
to play.
"We also recognise that
the use of in-situ testing to complement MCERTS
laboratory analysis can significantly improve
the quality and reduce the cost of site investigation
and remediation," added Peter.
"It can be used for improved
targeting of conventional sampling, better spatial
delineation of contaminated areas, and the development
of conceptual site models.
"Field testing and laboratory
analysis are often complementary tools and their
use will always be dictated on a site-by-site
basis. We are now preparing guidance on the role
and use of on-site analytical techniques for the
management of land contamination and hope to release
a draft document for consultation later this year.
"Our overarching policy
remains that the MCERTS standard should apply
to all chemical testing of soil where the results
are submitted to the Environment Agency for regulatory
purposes. The scheme assures laboratories, local
authorities, consultants, developers and the general
public that the data from tests is reliable and
meets the standards required for regulatory purposes
"Overall, the way self-monitoring
is carried out is changing fundamentally as more
and more monitoring and analytical companies recognise
that the use of MCERTS equipment and services
is best practice."
For further information check
the land contamination section of the Environment
Agency website: www.environment-agency.co.uk.
(National Press Office)
