Westminster City Council King Street Low Carbon Trial - Client Report

OVERALL CARBON USAGE

Figure 13 and Figure 14 demonstrate the overall carbon usage for both schemes and the savings made at King Street. They illustrate that the biggest carbon savings are to be made by changing the materials used on the highway. Exploration of recycled and lower carbon products will increase the embodied carbon savings. The operational carbon showed the biggest percentage saving against the comparison site, as the elimination of diesel reduced it to as low a footprint as possible at this stage. Once all vehicles and plant are able to be powered by sustainable fuels the operational carbon will be carbon neutral.

Figure 13 - Table showing the whole tCO2e carbon footprint for both schemes:

Marlborough Hill

King Street

Duration on site (Days)

31

40

Distance travelled, inc labour, supervision & deliveries (Miles) Plant usage, inc welfare (Hours) Operational carbon footprint (KgCO2e) Average operational carbon footprint per day Embodied material carbon footprint (KgCO2e)

7540

9394

71.5

114.8

5.95t

1.74t

0.19t

0.04t

40.69t

17.93t

Embodied carbon per m2 Total carbon footprint Carbon footprint per m2

0.13t

0.07t 19.67t 0.07t

46.64t

0.15t

Figure 14 - Table showing the King Street carbon savings

Tonnes Saved

Percentage Saving

Total operational carbon saving against comparison site Operational carbon savings per day Total Embodied carbon saving against comparison site Embodied carbon savings per m2 Total carbon savings against comparison site Total carbon savings per m2

4.21t

71%

0.15t

79%

22.76t

56%

0.06t

46%

26.97t

58%

0.08t

53%

29