Planning Consultation Guidance Notes

Appendix 1

Check list of Information required in a noise assessment
Introduction	Outline the purpose and scope of the report. A brief description of the proposal considered by the assessment. Site address or other location details (e.g. land adjacent to 123 Any Road....).
Methodology	Describe any standards / policies to be used and give a brief outline of why they have been chosen. Provide more detail and justifications why accepted standards have not been used. Outline the process to be followed. A clear plan indicating locations of noise sources, sensitive receptors, measurement positions and any mitigation measures if appropriate.
Noise measurements	Location, dates, and times of all measured data relied upon and provide summaries of the results obtained. If it has not been possible to measure at the actual location of the proposed development, state why an alternative location is considered representative. Explanations for any abnormal or anomalous results. Brief details of the equipment used and a confirmation that it has been verified within an appropriate time (usually bi-annually) and that appropriate site calibration checks were carried out. Note that all equipment used should comply with appropriate standards (e.g. IEC 61672 or its predecessors for Sound Level Meters). Meteorological conditions during the monitoring period i.Wind speed ii.Wind direction iii.Temperature iv. Precipitation Note: It will generally be acceptable to state that meteorological conditions were satisfactory for measurement purposes and only provide more detail if they are borderline.
Predictions	Where it has been necessary to predict noise levels, brief explanations of how these have been derived including any assumptions made (e.g. downwind propagation) and what standard have been followed (e.g.ISO 9613). If a software package has been used, the package needs to be identified (e.g. Lima,CadnaA, NoiseMap, SoundPLAN) along with a brief description as to its use and the input data and modelling parameters shall be provided. Brief details of the geographical and source data used-where data for new sources has been derived from measured data at another location the report shall include the original data and details of the assessment carried out. Details of any validation checks carried out. Diagram showing results of modelling.
Assessment	Give details of the assessments made based on the measured and/or predicted data at the façade of the nearest existing or proposed noise-sensitive premises. State any assumptions made. Show any calculations or predictions made in sufficient detail so that they could be checked for accuracy and validity. If the calculations are complicated, the details may be included as an appendix. An indication of uncertainty or errors associated with measurements or assessment.
Mitigation	Where mitigation is necessary for a development to satisfy noise criteria provided in this document the report should include a full specification of the mitigation. This may include the following: i. Alternative plant or machinery. Including maximum sound power level(s) for items of plant; sound power level at a given distance; tonal analysis appropriate technical specifications; full details of any attenuates and proposed location. ii. Reorientation of buildings or design to avoid noise sensitive receptors on noise-affected façades. iii. Barriers or bunds. Height, location(s),dimensions, material, construction. iv. Building envelope performance including enhanced glazing and doors. This shall also include clearly annotated drawings showing in plan and elevation the recommended treatments. v. Ventilation specification-this shall also include assessment of potential air quality impacts and where mechanical ventilation is being proposed the report shall include design criteria (including ventilation system design, flow rates, an assessment of overheating risk and the combined noise impact of noise break-through from the building envelope and the noise generated by the whole ventilation system inside the dwelling). vi. Any other data required by the developer to meet the required noise standards / guidance. Confirmation of expected mitigated sound levels. Mitigation details are included in the overall design.
Conclusions	A brief resume of the process described above and a confirmation that if the recommendations are carried out satisfactorily that appropriate standards / guidance will be complied with and the resulting noise environment will not adversely impact amenity.
Appendices	Scale plans showing the site location and the location of any measurement or prediction positions in sufficient detail to enable them to be readily identified. Aerial photos from online mapping sources may be useful. Unabridged noise monitoring / measurement results on which the assessment is based. Details of any calculations relied upon.

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