Westminster City Council King Street Low Carbon Trial - Client Report

The carbon results have been split down into the operational carbon, which is under FM Conway control and the embodied carbon, which is built into the materials through their manufacture and transportation. RESULTS

OPERATIONAL CARBON RECORDING The site supervisor recorded all carbon producing elements of the operational impact of works daily

This included:

• Travel to site for all staff and visitors

• Vehicle movements including all deliveries to site

• Time spent on power tools and machinery

• Time generator in use on Welfare Unit

The information was taken from the daily sheets and transposed onto a spreadsheet. The total mileage for travel and vehicle movements, and the hours spent on operational tools was calculated. The carbon was then calculated by multiplying these figures against the appropriate carbon values contained within the Government’s conversion factor document and divided by 1000 to give a carbon cost per tonne figure (TCO2e):

Total Miles Travelled/Total Hours Spent x Item Conversion Factor 1000 The results were independently verified by Norman Rourke Pryme Ltd (NRP) and Metis Ltd

CARBON SAVINGS The operations on King Street saved 4.21t of carbon against the Marlborough Hill scheme. This is equal to 71% saving. When this is averaged out per day, the saving that the new method produces is 79% . If these methods were to be implemented across the whole PPM footway programme, over 100t of carbon could be reduced, which would equate to a lorry travelling around the M25 38 times. The prohibition of diesel from site was the primary factor in these savings, which can be seen when the total carbon figures are broken down into:

• Travel

• Deliveries

• Operation

23