Data on noise is collected at monitoring points that are appropriate to the worksite, the location of local residential properties, and the works being undertaken. These “monitoring stations” are routinely downloaded and the data is collected and interpreted to ensure that we are working in accordance with our commitments to the relevant local authority. The output is a summary report which can be accessed via the link.
How to interpret the noise graphs
The red line running across the graph indicates a level of 75dB. This is not a noise limit imposed on the project, however, when construction noise is predicted or measured to exceed this level then noise insulation (NI) may be offered to home owners if the condition below is met. This level, and the circumstances in which noise insulation are offered are laid out in TfL’s Noise Insulation and Temporary Rehousing Policy which was produced in consultation with the Local Authorities.
- The predicted or measured noise level exceeds the noise trigger level for noise insulation at the property for at least ten day or night-time ‘periods’ during any consecutive fifteen day period, or alternatively, for 40 day or night-time ‘periods’ during any 6 month period.
The levels displayed on the graphs are actual levels recorded at the site boundary.