PROJECT CLOSE-OUT REPORT - Clifford Devlin · Monitor, report and set targets for transport to and...
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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 Page 2 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
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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
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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
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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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3. PHOTOGRAPHIC RECORDS
Original Structures
.
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General Progress of Demolition
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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
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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.
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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
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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.
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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
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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.
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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.
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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
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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.
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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.
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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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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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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
Gardens\MicroDust-29-09-2008-03.dat Start: 14:22:14 29/09/2008 End: 14:32:19 29/09/2008 File Calibration: Unmodified
Concentration Statistics Max: 0 mg/m3 (At 14:32:13 on 29/09/2008) Min: -0.001 mg/m3 (At 14:22:16 on 29/09/2008) Average: 0 mg/m3
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Reading FOUR Summary Report:- Report File: C:\Program Files\Casella Group Ltd\WinDust Pro\Lankaster
Gardens\MicroDust-29-09-2008-04.dat Start: 14:34:39 29/09/2008 End: 14:44:52 29/09/2008 File Calibration: Unmodified
Concentration Statistics Max: 0 mg/m3 (At 14:35:08 on 29/09/2008) Min: -0.001 mg/m3 (At 14:39:09 on 29/09/2008) Average: 0 mg/m3
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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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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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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