environmental impact statement kilmainhamwood compost facility ...

28.12.2012 Views
5361- Kilmainhamwood Compost Facility Extension- EIS • Establishing channels of communication between the Contractor/Developer, Local Authority and local Residents; Furthermore, it is envisaged that a variety of practicable noise control measures will be employed. These may include: • Selection of plant with low inherent potential for generation of noise and/or vibration; • Erection of temporary barriers around items such as generators or high duty compressors. For maximum effectiveness, a barrier should be positioned as close as possible to either the noise source or receiver. The barrier should be constructed of material with a mass of > 7kg/m2 and should have no gaps or joints in the barrier material. As a rough guide, the length of a barrier should be 5 times greater than its height. A shorter barrier should be bent around the noise source, to ensure no part of the noise source is visible from the receiving location. • Siting of noisy plant as far away from sensitive properties as permitted by site constraints. 10.4.2 Operational Phase The design of the site has been laid out so as to minimise noise impact on the surrounding environment. All major noise producing plant associated with the proposed facility is to be located within the site buildings and not in the open air. This design in itself provides significant noise mitigation advantages in that the noise reaching sensitive receptors and indeed the site boundaries is much curtailed due to horizontal distance separation. Worst case operational noise levels are predicted to comfortably comply within the EPA Guidance Note For Noise In Relation To Scheduled Activities which outlines a limit of a free-field LAr, T value of 55dB by daytime (08:00 – 22:00), at any noise sensitive location and one of 45dB for night operations. As such, no further mitigation is required for the operational phase of the development. For inspection purposes only. Consent of copyright owner required for any other use. As per EPA guidance (see Note 1 below), if a tonal component is detected during noise monitoring following the construction phase, a +5dB(A) penalty is added to the measured equivalent continuous Aweighted sound pressure level (LAeq) so as to determine the potential receptor response to the measured noise. To date, noise monitoring has been undertaken in accordance with EPA guidance and as per the requirements of the existing EPA waste licence. Results from noise monitoring undertaken to date (since the existing facility commenced operations in September 2006) have been in compliance with the EPA waste licence limits. Should a tone be observed during noise monitoring post installation of the proposed additional fans, this would incur the 5dB penalty (as outlined above), and would result in an exceedance of the 55dB LAeq limit during daytime hours. As such if a tone were to be detected during noise monitoring, it would have to be engineered out to meet day time limits. However it is not expected that this will arise, as there is 157 EPA Export 01-06-2010:03:55:59

5361- Kilmainhamwood Compost Facility Extension- EIS no existing character in the form of tonality from the existing fans, which operate as per the proposed fans. Note No.1 The EPA Guidance Document - Guidance Note for Noise in Relation to Scheduled Activities (2 nd Edition) - states: "The character of the noise is of considerable importance particularly during night-time. This can normally be assessed subjectively for tonal content or impulsive qualities. These characteristics attract a penalty of +5dB(A) added to the measured level. The presence of clearly audible tones can be objectively assessed by 1/3 octave band analysis". 10.5 RESIDUAL IMPACT On completion of all construction/installation works, and full commissioning of the proposed extension, it is anticipated that there will be a slight, permanent noise impact to the local noise climate as a result of the proposed facility. The operational noise output from the facility will not be significant, and shall be in full accord with all relevant criteria, and will be similar in both character and impact to that currently in place. Road traffic noise associated with the operational phase of the proposed facility is not expected to be significant in terms of a minimal predicted increase in overall existing heavy road traffic volumes on the surrounding road network. The total residual noise impact is predicted to be slight and permanent. For inspection purposes only. Consent of copyright owner required for any other use. 158 EPA Export 01-06-2010:03:56:00

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