Risk assessments must be recorded and data often reviewed and up to date every time essential. https://www.space-blogs.com/openx/www/delivery/ck.php?ct=1&oaparams=2__bannerid=101__zoneid=6__cb=001602b879__oadest=http%3a%2f%2fscientific-programs.science%2Fwiki%2FThe_Value_of_Carbon_Monoxide_Detectors