hub for sustainable management of waste soils and aggregates joanne kwan, ciria...
TRANSCRIPT
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Hub for sustainable management of waste
soils and aggregates
Joanne Kwan, CIRIA
10 December 2019
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What are we talking about today?
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Soil?
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Some facts:
Landfill and deposit for recovery sector 2016
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Why bother?
• Brownfield projects and other types of construction
projects general large amount of waste soil
• the government plan to build more than 330,000 new
houses every year and starts 6000 infrastructure projects
from 2021.
• 150 + waste soil related prosecutions from EA since
2000
• tightening of environmental legislation, including HMRC
and EA working together to clamp down illegal dumping,
people are more likely to be caught out
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The price of getting things wrong
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Why should we bothered?
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Waste soil management process
• Defining waste
• Waste Classification
• Reuse
• Disposal
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DoWCoP (version 2) 2011
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But still some problems….
• ‘Increasing involvement in peripheral persons in
the planning & development process
• Still a number of sites are ending up being
considered as illegal waste sites
• Taking up more of officers time sorting out the
problems rather than supporting industry
developing out sites’
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Classification of waste
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2018…
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New Guidance for Sampling Soils
• Published Feb 2019
• Contains guide for minimum number of samples for both homogeneous
soils and heterogeneous soils (e.g. fill)
• Statistics, examples
• Complements WM3 technical guidance
19December 23, 2019
© 2019 One Touch Data Limited
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Sampling and analysis for waste classification
• If the material is currently in situ, investigation and sampling should focus on soil
which is likely to become waste. This may mean the assessment of deeper
strata than would otherwise be completed, such as in areas of future basements
and service trenches.
• The analysis suite should be based on the hazardous properties (and therefore
determinands) anticipated based on prior knowledge of the site and site history.
• Unlike risk assessment, the classification of waste soil is based on the presence
of contaminants (totals analysis), and not the availability of contaminants. For
example, cannot screen out non-volatiles under hardstanding, or metals, such
as zinc, due to low human toxicity.
• The classification of waste is based on the properties of the bulk material, and
hence the wet weight. Standard analysis under the MCERTS scheme reports all
data as equivalent dry weight, and some correction for moisture content will
therefore be required.
• since waste classification is based on the properties of the bulk material,
analysis of the whole sample is appropriate where possible, and not just of the
fines fraction.
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Disposal
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Reuse
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Reuse…. a few things to remember
• A U1 Exemption requires you to register the exemption
with the EA, keep suitable records to demonstrate your
compliance and ensure the materials meet the
requirements of the exemption. The volume limit for soil
is 1000 tonnes.
• Under the CL:AIRE Code of Practice, you should
ensure you have legitimate reason to reuse the material
which must be suitable for that reuse purpose. A
Materials Management Plan must be prepared to detail
the whole process of assessment, tracking, reuse and
verification – with a formally Qualified Person to review
and declare the MMP. A Verification report should be
produced and submitted to CL:AIRE; the EA may audit
the site and landfill tax may be payable if there is no
verification record.
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• The WRAP Protocol outlines that waste should receive
source approval testing, and follows a waste recovery
process to meet protocol requirements. Records must
demonstrate the end of waste criteria was met.
• If there is a reason that material cannot be directly
reused – because of potential contamination or because
it’s not required – the material can either be treated
(under a suitable permit) to make suitable, or classified
and disposed of.
• If you do not have a legitimate use for your material on
site, there may still be other options as opposed to
sending it to landfill. This includes sending to a properly
permitted fixed soil recycling centre.
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Still feeling a bit like….
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Stakeholders meeting Oct 2019
• Advices from EA, LA and other regulators have been inconsistence
or confusing
• More education for regulators, landfill operators. Although clients
should ‘lead the way in managing waste soil but all parties in the
supply chain should be involved too.
• Need to have all the information in one place
• How to deal with difficult contaminants e.g. asbestos and Japanese
Knotweed
• Need to emphasis sustainability and circular economy
• How to deal with waste in hot spots – do we have the right tools?
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Some practical issues
• Application of these End of Waste Protocols are often difficult to
apply,
• The requirements for crushed concrete to reach its end of waste
status. Furthermore, many brownfield projects even after the
application of the waste hierarchy are left with surplus soils requiring
disposal, and the intricacies of classifying a waste soil, frequently
heterogeneous in nature, are often baffling to the non-expert.
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Why another CIRIA guidance?
Scope: the whole waste soil management
process i.e.
• Defining waste
• Classifying waste
• Reuse
• Disposal
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Aims and objectives
• Provide an easy accessible place for people to find up to date
information and guidance on waste soil management in a relevant
user-friendly format (Helping to bridge the skill gap between theory
and on-site practices experienced by general construction workers
and other non-specialists)
• Create platform for demonstrate and share good practice and
provide much needed training on waste soils/aggregates in
construction
• Help people to avoid making mistakes and save money when
managing waste soil
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What are we trying to produce?
Develop the interactive document which will:
• provide up to date guidance on the whole waste soil management process
starting from defining waste to classifying waste, reuse and disposal.
• It will help the target audience (see below):
• meet their legal obligations, projects objectives and other wider targets e.g.
sustainability and circular economy etc.,
• deal with the process and pitfalls of defining, classifying, reusing and
disposing waste soil and how to use imported soils (including manufactured
soil) and recycled aggregates
• how to ensure compliance with the end of waste protocol where not covered
by a permit or exemption,
• how to deal with difficult contaminant e.g. Japanese Knotweed, asbestos
etc.
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What is so special about the project?
• Will differ from other waste guidance/web site and look at the site activity in
question e.g. crushing concrete, importing recycled aggregate, using
recycled topsoil, bulk excavation, reuse of excavated soil on site, etc. – this
will enable the busy site operative to get quickly to the information they
need for the actual process they are undertaking. This will be inform of
interactive check list
• summaries of the relevant waste soil related legislation in England, Wales,
Scotland and NI and explain how they should be applied
• link/signpost to useful information, recent relevant guidance and projects
e.g. work CIRIA has done in asbestos in soil
• highlight areas (by using case studies where relevant) to explain common
mistakes and misunderstanding in different project scenarios
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What is so special about the
project?
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What is a ‘hub’?
A centre of activity : FOCAL POINT
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Programme
• Month 1 to 12 - To develop interactive
document)
• Months 13-36 - the interactive document will be
kept up to date
• There will be 2 face to face events/webinars a
year for 3 years.
Contact: [email protected]