project close-out report - clifford devlin · monitor, report and set targets for transport to and...

Clifford Devlin Limited

Clifford House, Towcester Road, London E3 3ND

Tel: +44 (0) 20 7538 87�21

Fax: +44 (0) 20 7987 1857

Email: [email protected]

Web: www.clifford-devlin.co.uk

PROJECT CLOSE-OUT REPORT

THE DEMOLITION WORKS AT PROJECT NAME/ADDRESS

ON BEHALF OF CLIENT NAME

Ref: A771-PCOR-1-B

Date: 5-May-13

PROJECT CLOSE-OUT REPORT FOR THE DEMOLITION WORKS AT PROJECT NAME/ADDRESS

Ref: A771-PCOR-1-B

Date: 05-May-13

© 2013 Clifford Devlin Group of 40

1. INTRODUCTION

This document has been prepared to comply with the requirements of the Construction (Design

and Management) Regulations 2007. It contains all the information which could have relevance to

future works on the section of the site in which works under the contract took place. It also serves

to record environmental and sustainability information with particular references to the Site Waste

Management Plan Regulations (2008), the Building Research Establishment’s Environmental

Assessment Method (BREEAM) and the Code for Sustainable Homes.

Construction (Design and Management) Regulations 2007

This document is intended for use by the CDM coordinator appointed for the works in the process

of assembling the Health and Safety File and for others to extract relevant data. The information

contained within this document focuses on the following topics:

Evidence of correct handling of arisings from the work intended to demonstrate that all

materials were completely and correctly removed

Evidence which came to light during the work as to positions of services, below ground

obstructions and other reportable items

The nature and positioning of imported materials

Site Waste Management Plan (SWMP) Regulations 2008

These Regulations require a site waste management plan prepared for every construction project

with an estimated cost greater than £300k. The information contained in Section 3 (Waste

Management) can be used to demonstrate compliance with the Regulations regarding the

description, quantity and destination of each waste type produced.

Building Research Establishment Environmental Assessment Method (BREEAM)

BREEAM is the leading and most widely used environmental assessment method for buildings. It

sets the standard for best practice in sustainable design and has become the de facto measure

used to describe a building's environmental performance.

The information contained in this report relates to the following clauses:

Monitor and set targets for CO2 or energy arising from site activities


Ref: A771-PCOR-1-B

Date: 05-May-13


Monitor, report and set targets for transport to and from site enabling transport CO2 emissions

to be calculated

Monitor construction waste on site

Sort and recycle waste type on site

Adopt Best Practice policies for minimising pollution emissions (dust) to air arising from site

operations

Significant use of crushed recycled aggregates obtained on site are specified to deliver positive

aspects of the design (e.g. building structure, ground slabs, roads etc.)

Materials for key building elements are responsibly sourced

Code for Sustainable Homes

In April 2007 the Code for Sustainable Homes replaced Ecohomes for the assessment of new

housing in England. The Code is an environmental assessment method for new homes based

upon BRE’s Ecohomes and contains mandatory performance levels in 7 key areas of

environmental impact. The information contained in this report relates to the following issues:

Responsible sourcing of materials – building elements

Construction waste management

Considerate Constructors Scheme

Construction site impacts

Project Responsibilities

Principal Contractor: XXXXXXX

Project Manager: XXXXXXXXX

Architect: XXXXXXXX

Quantity Surveyor: XXXXXXXX

Structural Engineer: XXXXXXXX

Scaffolding: XXXXXXX

Hoarding: XXXXXXXXXX


Ref: A771-PCOR-1-B

Date: 05-May-13


2. METHODOLOGY

The structures demolished were located in Project name/address and comprised of a four storey

block of 125 flats, constructed of reinforced concrete floors and roof with brick panel in fills.

Reinforced concrete staircases provide access to upper floors.

Enabling Work

Erection of permanent boundary hoarding

Local fencing and signage to create exclusion zones

Exterior of buildings scafolded

Service Disconnections

Gas – gas supplies were terminated outside site boundary. Two separate disconnections were

undertaken with all pipes purged of gas (see site map for disconnection locations).

Electricity – electric supply cut off at site boundary in nine locations (see site map for location).

Lamp Posts – six of the seven lampposts on site were disconnected. One lamppost remained

connected (LIVE). (see Appendix II)

Live electric cable – 6000-volt cable runs through the site (see site map for location).

Asbestos Management

A Preliminary review was carried out to confirm all asbestos materials had been removed.

Asbestos containing materials (ACMs) have been previously removed by others, but on

possession of the site quantities of ACMs were found throughout the site. ACMs were also

uncovered in the ceiling of storage cupboards on the flats’ balconies.

Soft strip

Removal of abandoned furniture

Soft stripping to all associated structures

Structural demolition

Demolition of the structures down to lowest slab level


Ref: A771-PCOR-1-B

Date: 05-May-13


Break out and removal of ground slab and foundations

Break out and removal of areas of hard standing

Process and recycling of materials arising from the work in accordance with the Site Waste

Management Plan

Sorting and recycling of all resulting debris as work proceeds, including the crushing of all

suitable material and grading across the site

Disposal of debris not suited to recycling

Piles

A survey was undertaken to identify and plot the location of existing piles. (See diagram for

location of piles – Appendix III)

Tree Protection

A protection notice was issued on sixteen trees on site. The trees had heras placed round them

and all site operatives advised of their protected status. All the trees were not damaged at end of

project.

Hoarding

The hoarding was left in good condition and the keys to the entrance gate was handed over to Mr

James Harry, Newham Borough Council.


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Date: 05-May-13


3. PHOTOGRAPHIC RECORDS

Original Structures

.


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Date: 05-May-13


General Progress of Demolition


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Date: 05-May-13


4. WASTE MANAGEMENT

Materials arising from the works comprised:

Material Classification Final Destination

Hard-core (brick and concrete)

Recycling Crushed on site

Timber Organic Waste – Recycling

GBN Services, Estate Way, Leyton, E10 7JN and London Waste Edmonton N10 (Re-processed into chip for board / fuel production)

Lightweight non-structural elements e.g. plasterboard

Organic Waste – Recycling

Plasterboard Recycling UK Facility – MSK River Road, Barking. (Gypsum extracted for re-use in cement dust manufacture)

Glass Recycling Berryman Glass, Chequers Lane, Dagenham, RM6 6QD

Metals Recycling EMR, Bidder Street, Canning Town, E16

Asbestos Hazardous Waste Augean Ltd, Kingscliffe Quarry, Peterborough

Rubbish General Waste Veolia/ Waste Transfer Station – Bow, London E3

Wastes schedule and analysis

The following figures have been transferred from the PROJECT NAME Waste Record

spreadsheet, which should be consulted for a detailed understanding of the waste quantities

handled, destinations and so forth.

Waste Stream Total Tonnage %

Rubbish (to landfill) 71.24 0.68

Wood 68.46 0.65

Metal 31.69 0.31

Plasterboard 14.84 0.14

Concrete/bricks 10285.00 98.22

TOTALS 10471.23 100.00


Ref: A771-PCOR-1-B

Date: 05-May-13


Summary data

Total mass of arisings: 10471.23 tonnes

Waste recycled: 99.32%

Waste Land filled: 0.68%

Records

Clifford Devlin will hold the originals of all Waste Transfer notes, disposal tickets, hazardous waste

consignment notes, air test certification etc in archive for the statutory required period. All the

hardcore and concrete on the site was crushed to a type 6F2 crushed concrete/hardcore

specification and spread over the whole site.

Positions of services, below ground obstructions and other reportable items

All such were reported to the Contract Team as identified for inclusion in the rebuild/refurbishment

design package.

Nature and positioning of imported materials.

Quantities of imported materials were kept to a minimum for the demolition works. The main

imported material for the demolition operation was Fuel (Gas Oil) as the majority of this operation

was mechanised.


Ref: A771-PCOR-1-B

Date: 05-May-13


5. CONSUMPTION

This section relates to the BREEAM clauses:

Monitor and set targets for CO2 or energy arising from site activities

Monitor, report and set targets for transport to and from site enabling transport CO2 emissions

to be calculated

i.e. we calculate the carbon footprint for this phase of the project

Project Execution

Assumptions: CO2 production is directly linked to simple fuel consumption, so accurate figures for

gas oil deliveries to site were kept and a conversion factor of 2.5 kg/litre[1] used. Other CO2 sources

are propane used for hot cutting (1.5 kg CO2 per litre[2]), and Electricity Consumption 60g/kWh[3]

(before supplies isolated after which power is generated on site and thus included in the fuel

consumption, in this particular case all electricity consumption was provided and monitored by

Client).

CO2 Contributor Amount Conversion Factor Footprint (t)

Gas Oil 17500 2.5 kg/litre 43.75

Propane 0 0 0

Total 43.75

Transportation

Methodology: All vehicle movements to and from site were logged by the gateman. Carbon is

calculated on fuel consumption as above at 2.5 kg/litre fuel assuming an average fuel consumption

for cars of 8 miles per litre and lorries of 2 miles per litre.

CO2 Contributor Amount Conversion Factor Footprint (t)

Lorries From Transportation Spreadsheet,

39 loads 0.55

Propane 0 0 0

Total 0.55


Ref: A771-PCOR-1-B

Date: 05-May-13


References: [1] http://answers.yahoo.com/question/index?qid=20070716225125AAHzgmg (which references

official US statistics. Alternatively, typical UK car consumption figures suggest 2 kg/litre) [2] http://en.wikipedia.org/wiki/Propane#cite_note-1 [3] http://www.edf.fr/html/etiq_elec/uk/index.html#2

Carbon Generation per tonne of waste

Total Carbon generation by tonne of waste was 4.23 kg/tonne.

This compares with figures for site where waste does not get reused on site of 12 to 16 kg/tonne,

meaning a substantial reduction in carbon footprint was achieved, even more so if the impact of

NOT importing material to cover the site is taken into account.

http://answers.yahoo.com/question/index?qid=20070716225125AAHzgmg

http://en.wikipedia.org/wiki/Propane%23cite_note-1

http://www.edf.fr/html/etiq_elec/uk/index.html#2


Ref: A771-PCOR-1-B

Date: 05-May-13


6. POLLUTION CONTROL

In the UK we are obliged to keep emissions levels close to adjacent buildings and the immediate

vicinity to within acceptable limits. We have undertaken monitoring throughout the duration of the

project to ensure/demonstrate emissions were kept within acceptable limits. The following

techniques were employed to minimise the emission of noise, vibration and dust:

Where possible low impact demolition techniques that use non-percussive plant and equipment

such as ‘munchers’, ‘pulverisers’ and ‘crackers’ were used

Diamond drilling and saw cutting were used to severe large concrete structures such as

basement slabs and when separating retained structures

Soft materials were placed in the bottom of skips to reduce the sound of loading debris/waste

Water was sprayed onto the workface to suppress the emission of dust

The site was enclosed using plastic monarflex sheeting to prevent the escape of debris/ dust

All vehicle movements were planned and coordinated to minimise traffic pollution

Noise

Noise created by on-site activities should not exceed 75 decibels over a 10 hour time period.

It was agreed in advance with the client (CLIENT NAME) and the Local Authority (London Borough

of XXXX, Environmental Health Dept) that noise should be taken by a Type 1 Integrating Sound

Level Meter every 3 days. The following table provides a summary of test results.

Date Duration (hrs) Average Sound level LEQ (dB)

LMax (dB) Peak (dB)

20-Jan-09 10:06 48.0 56.4 66.2

23-Jan-09 10:03 41.6 50.2 52.3

28-Jan-09 10:12 49.5 60.3 72.1

02-Feb-09 10:07 50.5 67.3 70.3

05-Feb-09 10:09 54.7 61.5 70.2

10-Feb-09 10:14 67.3 73.0 74.1

13-Feb-09 10:01 39.6 46.1 47.8

18-Feb-09 10:04 40.5 47.0 49.3

TOTAL PROJECT 49.0 73.0 74.1


Ref: A771-PCOR-1-B

Date: 05-May-13


For complete noise test data see Appendix 9.

Vibration

Vibration generated by on-site activity should be no more than 25 mm per square second.

It was agreed in advance with the client (CLIENT NAME) and the Local Authority (London Borough

of XXXX, Environmental Health Dept) vibration measurements were taken at representative

locations on the site perimeter (see the location map). every hour using a Monitran Vibration meter

every 4 days (every 2 days during structural demolition phase). The following table provides a

summary of test results.

Date No readings

taken Average value

(mm/s2) Max value

(mm/s2)

20-Jan-09 9 1.65 4.55

26-Jan-09 12 2.67 8.75

30-Jan-09 11 1.98 6.23

05-Feb-09 23 8.75 16.78

07-Feb-09 21 17.7 21.54

09-Feb-09 20 15.56 24.35

11-Feb-09 17 9.65 16.56

13-Feb-09 20 14.34 20.05

17-Feb-09 7 3.45 6.78

TOTAL PROJECT 8.42 24.35

For complete vibration data see Appendix 10.

Dust

Airbourne Dust particles (PM10) should not exceed 100 micrograms per cubic metre in the vicinity

of the site.

As agreed in advance with the CLIENT and Local Authority dust samples were collected every 4

days (every 2 days during structural demolition and RCA crushing phases) with a Casella

Instruments Microdust Pro Aerosol Monitoring System at representative locations on the site

perimeter (see the location map and Appendix 7). Samples were of approximately 10 minutes

duration each and were of total dust levels. Weather at the time was fine with only light winds.


Ref: A771-PCOR-1-B

Date: 05-May-13


Date Average value (mg/m3)

Max value

(mg/m3)

20-Jan-09 0 <0.001

26-Jan-09 0 <0.001

30-Jan-09 0 <0.001

05-Feb-09 0 <0.001

07-Feb-09 0.012 0.018

09-Feb-09 0.006 0.013

11-Feb-09 0.003 0.009

13-Feb-09 0 <0.001

17-Feb-09 0 <0.001

TOTAL PROJECT 0.002 0.018

All results show LOW/NIL levels of dust in the air. For comparison, use is made of the London Air Quality Network. The nearest similar station recorded levels of 10-20 micrograms per cubic meter during the same period, equating to good air-quality.


Ref: A771-PCOR-1-B

Date: 05-May-13


APPENDICES

1. ORIGINAL SITE MAP PRIOR TO DEMOLITION

2. POSITIONS OF LIVE LAMP POSTS

3. EXISTING PILE POSITION SURVEY

4. WASTE RECORD FORMS/CARBON FOOTPRINT CALCULATIONS

5. POLLUTION MONITORING LOCATION MAPS

6. AIR TESTING CERTIFICATES

7. DUST MONITORING DATA

8. LONDON AIR QUALITY NETWORK DATA

9. NOISE SURVEY DATA

10. VIBRATION MONITORING DATA


Ref: A771-PCOR-1-B

Date: 05-May-13


APPENDIX 1: ORIGINAL SITE MAP PRIOR TO DEMOLITION


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APPENDIX II: POSITIONS OF LIVE LAMP POSTS


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APPENDIX III: EXISTING PILE POSITION SURVEY


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APPENDIX IV: WASTE RECORD FORMS/CARBON FOOTPRINT CALCULATIONS


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APPENDIX V: LOCATION MAPS Barnet 2 – Finchley LAQN Station Barnet 1 – Tally Ho Corner Site


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APPENDIX VI: AIR TESTING CERTIFICATES


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APPENDIX VII: DUST MONITORING DATA

Calibration run, machine contaminated reading 0.002

General view across site from the Car Park, dust levels visually very well controlled.


Ref: A771-PCOR-1-B

Date: 05-May-13


Run 2, adjacent to loading/crushing, downwind.

Dust Sampler baseline remains at 0.002, but handling of (well damped) feedstock gives significant dust visually and 0.010 to 0.013 mg/m3, well below the WEL of 5 mg/m3, but high enough to give rise to complaints of it being dusty, largely because the particulate size is quite large (mainly non-respirable). The good news is that it also cannot travel far, but if it does travel it will soon coat nearby cars. If the particle size were smaller, this level of dust cloud would equate to 1 or more mg/m3.


Ref: A771-PCOR-1-B

Date: 05-May-13


For comparison, very dry fine concrete residue was swept toward the dust monitor from upwind, giving rise to dust concentrations from 0.2 to 0.45 from a dust cloud visually similar to that arising at the crusher.


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Date: 05-May-13


Dust Survey Reading ONE: Calibration run. Summary Report:- Report File: C:\Program Files\Casella Group Ltd\WinDust Pro\MicroDust-29-09-2008-

01.dat Start: 14:02:03 29/09/2008 End: 14:03:22 29/09/2008 File Calibration: Unmodified Concentration Statistics Max: 120.34

mg/m3 (At 14:02:12 on 29/09/2008)

Min: 0 mg/m3 (At 14:03:18 on 29/09/2008) Average: 66.621 mg/m3


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Date: 05-May-13


Reading TWO Summary Report:- Report File: C:\Program Files\Casella Group Ltd\WinDust Pro\Lankaster

Gardens\MicroDust-29-09-2008-02.dat Start: 14:08:36 29/09/2008 End: 14:18:43 29/09/2008 File Calibration: Unmodified

Concentration Statistics Max: 0 mg/m3 (At 14:09:35 on 29/09/2008) Min: -0.001 mg/m3 (At 14:08:37 on 29/09/2008) Average: 0 mg/m3


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Reading THREE: Summary Report:- Report File: C:\Program Files\Casella Group Ltd\WinDust Pro\Lankaster




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Reading FOUR Summary Report:- Report File: C:\Program Files\Casella Group Ltd\WinDust Pro\Lankaster




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Date: 05-May-13


APPENDIX VIII: London Air Quality Network Data: The nearest representative constant monitoring stations are the Barnet 2 – Finchley Site which is in a very similar location in terms of proximity to the North Circular road, and Barnet 1 – Tally Ho Corner. Data from http://www.londonair.org.uk/london/asp/default.asp shows PM10 levels for recent days as shown below, on the order of 20-40 μg/m3.

Barnet 2 – Finchley

Barnet 1 – Tally Ho Corner


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Date: 05-May-13


Comparison Data for the Barnet 2 - Finchley Station (in blue) and the Brent 5 – Neasden Lane site

(in red)


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APPENDIX IX: Noise Survey data

Both noise and dust emission references were taken simultaneously at the locations as marked on the aerial photograph above. Where possible (project progress depending ) all future monitoring will take place as close as possible to the locations as listed, to give comparison data. Future reports will list as far as is practicable any events that where occurring at the time of monitoring and state an approximate distance and bearing reference from the monitoring station.


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Data Chart

Data Graph


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APPENDIX X: VIBRATION MONITORING DATA


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Date: 05-May-13


Clifford Devlin Limited

Clifford House, Towcester Road, London E3 3ND

Tel: +44 (0) 20 7538 87�21

Fax: +44 (0) 20 7987 1857

Email: [email protected]

Web: www.clifford-devlin.co.uk

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