Responding to waste minimisation and management ... - Wrap

22 Responding to waste minimisation and management requirements Responding to waste minimisation and management requirements 23
The preferred approach to pre-demolition
advocated in WRAP’s regeneration guidance
would be to commission a pre-demolition
audit as part of the design stage.
This would provide:
data on the potential range and quantities
of recovered materials available for the
new build, allowing the designer to modify
the new build design to maximise the
amount of on site recovered materials; and
data for inclusion in the tender
documents, removing the need for
multiple ‘pricing audits’ to be undertaken
by the contractors bidding for the work
and maximising the likelihood of
innovative proposals for the demolition
which improve the quantity of
recovered materials.
Figure 6: The MRER approach
Policy
Feasibility
Clients and other policy setters
WRAP Regeneration Guide provides the
methodology for a demolition audit to enable
the creation of KPIs for the resource recovery,
it also assists in setting out a New Build Bill of
Quantities (BOQ) to summarise the potential
for using the recovered materials in the build.
The WRAP Regeneration Guide is as follows:
1. produce a Bill of Quantities of the
different materials in the buildling
to be demolished;
2. identify the tonnage of materials that
can be recovered; and
3. determine the percentage of
materials recoverable.
This fulfils the requirements of the SWMP,
where an estimation of the quantities of arising
that will be generated during the demolition
process and identification of methods to deal
with them is necessary.
Set overall policy
client consultant contractor
Set project policy
and outline
KPI targets
Construction companies must ask four
questions at the strip-out stage and the table
below identifies the department(s) which
should be responsible for acting upon these
questions and the related actions.
Provisions must be made to find uses for
resources recovered from the strip-out,
particularly those which can be reused.
A good start is to contact local resource
recovery charities and publicise excess
material and equipment on waste exchange
data-bases, 5 particularly when they cannot be
reused on site or on other company projects.
These websites provide information on
companies or organisations that could use
the equipment either in the locality or
further afield.
2.3 Key Performance Indicators
There are two Key Performance Indicators
(KPIs) which should be used to drive forward
the recovery and reuse of demolition and
construction waste material on a project.
These include:
the Demolition Recovery Index (DRI)
– describes the efficiency of material
recovery from demolition calculated as the
quantity of materials recovered from the
demolition process, divided by the total
quantity of materials generated by it.
the Retained Material (RM) KPI
– a measure of the extent of reuse of
demolition materials on site, calculated
as the quantity of recovered materials
generated from the demolition phase
that are used in the new build, divided by
the total quantity of recovered materials
created from the demolition.
THINGS TO CONSIDER
Ensure comprehensive understanding of the principles of
WRAP’s Efficient Use of Materials in Regeneration.
Contractor should bring the waste management and
demolition contractor on-board immediately.
Design team should be made aware of the data from the
demolition/new build audits to incorporate demolition
material into new build design.
Ensure procurement team is aware of demolition materials
available and responds accordingly.
Outline
design
Detailed
design
Demolition
New build
Evidence of materials
resource efficiency
performance
Set project material resource
efficiency objectives
Review of detailed design
Set requirements in tenders
and planning submission
Calculate KPI targets
Review of outline design
pre-demolition audit
Evidence of materials
resource efficiency
performance
Tender invitation responses
Assessment of feasibility of
MRER objectives and
KPI targets
Planning of demolition
to meet materials
resource efficiency
objectives and KPIs
Evidence of materials
resource efficiency
performance
Selection and
procurement of
materials to meet
objectives and KPIs
Question
1. Can the materials be
recycled or reused within
the new build
2. Can materials be
reused elsewhere within
the company
Who should be involved
Design team Procurement team Site team
The design team should
follow the ICE Demolition
Protocol and WRAP’s
Efficient Use of Materials
in Regeneration guide. 6
Table 3: Structuring the materials recovery process
The procurement team
should be responsible for
finding out where these
materials might be needed
in the company and whether
it would be economically
viable to deliver them to the
specified site.
The site team should utilise
the expertise and knowledge
of the waste management
contractor.
Close out
Evidence of materials
resource efficiency
performance
Evidence of materials
resource efficiency
performance
Evidence of materials
resource efficiency
performance
Review and feedback Review and feedback Review and feedback
5. See Table 7: Materials Exchange Websites
6. WRAP’s Efficient Use of Materials in Regeneration guide is a step-by-step guide linking the Demolition Protocol through to the
initiation of a SWMP