REC prepared a Noise Impact Assessment for a proposed Day Care Centre at Granta Park in Cambridge. A 24 hour Noise Survey was carried out, to inform the Noise Impact Assessment, which was undertaken to identify key noise sources in the vicinity of the site. The results of the assessment have shown that standard thermal double glazing will be sufficient in controlling external to internal noise break-in, however, with a partially open window, exceedences of the internal noise criteria will occur. As such, alternative ventilation has been specified in the form of frame mounted trickle ventilators have been specified. With regards to external noise in any proposed play areas, an acoustic fence will be required in order to control noise levels to meet applicable criteria.