HS2 CAMDEN DEMOLITION AND DUST PROCESS REVIEW 2...Safety and Health (IOSH), International Institute of Risk and Safety Management (IIRSM), European Federation of Explosive Engineers,

HS2 – CAMDEN

DEMOLITION AND DUST

PROCESS REVIEW 2

Report Number: HS2-CAM-02 Author: MIDE AssocRICS MIIRSM GradIOSH AIExpE

C&D Demolition Consultants Ltd

Egerton House

2 Tower Road, Birkenhead

CH41 1FN

0151 305 0909

[email protected]

www.canddconsultants.co.uk

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Table of Contents C&D Demolition Consultants Ltd ................................................................ 3

The Brief ..................................................................................................... 3

Dust Mitigation ........................................................................................... 4

Conclusion ................................................................................................. 6

Table of Figures ......................................................................................... 7

www.canddconsultants.co.uk

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C&D Demolition Consultants Ltd

C&D is one of the UK’s leading ‘award-winning’ demolition and asbestos consultants and has

been involved in over 400 complex projects worldwide, ranging from the explosive demolition

of 30-storey tower blocks, tower block by top down and high reach demolition to industrial

demolition, inner city demolition and oil rig offshore work.

We are full members of the Institute of Demolition Engineers (IDE), Institute of Occupational

Safety and Health (IOSH), International Institute of Risk and Safety Management (IIRSM),

European Federation of Explosive Engineers, ARCA Asbestos Managers and Chartered

Structural Engineers.

C&D Demolition Consultants Ltd helped to implement BS:6187-2011, which is the code of

practice for full and partial demolition. We aim to help clients understand the management of

the demolition process for structural stability using temporary works where required. C&D

also have two engineers who are on the first ever Demolition Engineering MSc degree.

The Brief

C&D Demolition Consultants Ltd were appointed by of CSJV and requested

C&D to carry out a working review on behalf of HS2. C&D were asked to give their expert

opinion on the demolition contract that is being undertaken by Clifford Devlin Ltd in Camden.

After an initial report, C&D are undertaking a secondary report following watching brief on site

with the high reach working. Further to the high reach working C&D witnessed the dust

control measures that had been put in place by Clifford Devlin Ltd.

They have asked C&D to produce a follow up written report and comment on how the

demolition is being carried out. In addition to reviewing the dust process. C&D will refer to the

following legislation that is legally binding for this contract. This namely being the CDM

(Construction, Design and Management) 2015 Regulations, BS:6187-2011, (Demolition Code

of Practice) Control of Asbestos Regulations 2012 and NFDC Code of Practice for High

Reach demolition rigs and exclusion zones.

www.canddconsultants.co.uk

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Dust Mitigation

During my previous visit on the 16th of January 2020 I had indicated a number of control

measures that would be required to ensure the dust levels did not affect the vulnerable

residents living adjacent to the demolition area. On inspection and during my second site visit

on the 28th of January 2020 I witnessed the control measures listed below.

1- Direct water feed suppressing demolition dust from the attachment onto the work area

being demolished.

2- Operatives working from MEWPS directly damping down the work face with high

pressure hoses.

3- Dust bosses sending fine particles of water to the demolition area. Not only at high

level but also at low level were the dust vortex can generally produce clouds of dust.

4- Moto fogs working alongside and adjacent to the demolition zone. This was producing

a finer mist but with a more direct application suppressing the dust particles.

5- During my site visit I went onto the demolition work zone whilst the operatives were on

their break. During this time an operative was damping down all piles of materials. This

prevented any dust accumulation once the demolition commences.

6- The stockpiles of materials were below the height of the external hoarding and all

stockpiles during my visit were either being damped down or had been damped down.

Following my initial report and my initial site visit the purpose of the second visit was to

physically see and observe dust suppression best practice in operation. Certainly on a visual

perspective the dust mitigation was being implemented and witnessed no observable dust

release to the local surroundings.

Figure 1- High Reach working with Dust Suppression control measures

www.canddconsultants.co.uk

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On returning to the office I was asked to review the PM10 levels from the six number dust

monitors. (Denoted by figure three) Figure two below is an indication that the dust levels have

been mitigated and are significantly below previous levels that were impacted on the site.

Therefore, it is clear that the points listed below for dust mitigation are clearly working.

Figure 2- Dust Particle review

Figure 3 - Location of dust monitors on site

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21/01/202001:00:00

21/01/202021:00:00

22/01/202017:00:00

23/01/202013:00:00

24/01/202009:00:00

25/01/202005:00:00

26/01/202001:00:00

26/01/202021:00:00

27/01/202017:00:00

28/01/202013:00:00

µgm

-3

Date

PM10 Monitored Levels around Regents Park Estate site21st-28th January 2020

AQ001

AQ011

AQ012

AQ013

AQ018

AQ021

Trigger Level

www.canddconsultants.co.uk

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Methodology

The use of the high reach as a methodology was already pre agreed prior to C&D Demolition

Consultants Ltd being asked to produce two reports on the dust limitation issues. Therefore,

we are unable to comment on the reasoning or price implications that this method was being

used at the design stage. However, I can confirm during my two visits that the methodology

was compliant and also was having no impact on the residents or the local area from both my

analysis of any visual dust migration or on reviewing the onsite six dust monitor stations. In

relation to health and safety it was clear that no operatives were working at height or was

there any danger to the site operatives or general public. With only the ability to judge the

methodology since our appointment it was clear that the methodology being adopted was

both best practice and compliant.

Conclusion

I have now visited the site on two occasions and have witnessed significant dust mitigation

techniques as well as a desire from the CSJV to create best practice. I have taken on board

the comments from the Camden Council, HS2 and appreciate the need for mitigation for all

residents. Finally, I can conclude that not only the desire for best practice is being undertaken

that the contractor has proven that their techniques are beyond best practice within the

demolition industry. In addition, the dust levels are now confirming that the mitigation of the

dust is working and is below any trigger levels identified.

MIDE AssocRICS MIIRSM GradIOSH AIExpE

www.canddconsultants.co.uk

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Table of Figures

Figure 1- High Reach working with Dust Suppression control measures ........... 4

Figure 2- Dust Particle review ............................................................................ 5

Figure 3 - Location of dust monitors on site ....................................................... 5