Westminster City Council King Street Low Carbon Trial - Client Report

OTHER ENVIRONMENTAL BENEFITS

NOISE MONITORING Socotec were commissioned to deliver background noise and construction noise monitoring for Marlborough Hill and King Street. Additional testing on each piece of equipment was carried out to give a better understanding of the individual items contributing to the overall noise levels. The results are below:

DISC CUTTER

Petrol (dB)

Electric (dB)

Running Idle at Source Running Idle 3M away

102.6 88.0

84.2 81.7 101.4 87.8

In Use at Source In Use 3M Away

106

92.4

WACKER PLATE

Petrol (dB)

Electric (dB)

Running Idle at Source Running Idle 3M away

106.1

98.2 86.1 100 85.9

91.1

In Use at Source In Use 3M Away

103.4

92.7

MINI DIGGER

Diesel (dB)

Electric (dB)

Running Idle at Source Running Idle 3M away In Use at Source (Concrete breakout) In Use 3M Away (Concrete breakout)

88.7 77.2

68.4 62.7

107.9

107.2

91.5

99.2

The ‘Running Idle at Source’ figures show how much quieter electric plant is compared to diesel. In addition to the above plant, the electric and solar welfare made no additional noise to the ambient noise. King Street ambient noise is marginally higher than at Marlborough Hill and subject to inconsistent very loud noises such as helicopters, vans and motorbikes. The minimum sound recorded was 6dbA higher at King Street than at Marlborough Hill which indicates a consistent higher output background noise.

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