Environmental Noise Assessments for EPA-Licensed Sites

At ICAN Acoustics, we conduct comprehensive noise studies for both existing and proposed developments — from individual buildings to large-scale industrial facilities and transport infrastructure such as road and rail projects.

We specialize in environmental noise assessments for EPA-licensed sites, ensuring full compliance with Ireland’s NG4 guidance issued by the Environmental Protection Agency (EPA). These assessments are essential for demonstrating adherence to noise regulations and for informing site operations and planning decisions.

NG4 Guidance Overview

In January 2016, the EPA revised its Guidance Note for Noise: Licence Applications, Surveys and Assessments in Relation to Scheduled Activities (NG4). This update supersedes previous publications and offers clearer, more robust protocols for environmental noise assessments.

Key updates in the NG4 (2016) include:

  • Alignment with BS 4142:2014 standards

  • Clarified methods for assessing tonality and impulsivity

  • Guidance on survey durations and sampling periods

  • Use of LAF90 where extraneous noise affects LAeq values

  • Integration of clarifications from the EPA’s FAQ document

EPA Noise Limit Criteria

For EPA-licensed sites, noise emissions must typically comply with the following limits:

  • Day (07:00–19:00): 55 dB(A) LAr,T

  • Evening (19:00–23:00): 50 dB(A) LAr,T

  • Night (23:00–07:00): 45 dB(A) LAeq,T

To download the Irish EPA NG4 (2016) Guidance Document, click here.
Watch our informative video to learn how to choose the right professional for your annual EPA noise survey.

Why Choose ICAN Acoustics?

Our expert team combines deep technical knowledge with cutting-edge measurement tools, helping you meet compliance requirements efficiently and confidently. Whether you’re applying for a licence or completing your annual survey, we ensure your assessments are thorough, accurate, and audit-ready.