Construction dust can compromise air quality, environmental noise pollution can be harmful to workers and the general public, and vibration can cause damage and a general nuisance to nearby property, Area and boundary monitors are used at the fence line, such as construction, to monitor emissions from the site. Sites may have limits for noise (often hourly LAeq), dust (PM10 or PM2.5) or vibration (PPV) and boundary monitors can help prevent complaints and manage good relationships with site neighbours.