At HP we design our electronic equipment capable of reliable operation in a G1 environment”.“Most commercial mini-computers and peripheral equipment with fan-cooled electronics will survive exposure to a mild (Class G1) corrosive environment for a normal life of 10 years with no appreciable corrosion-induced failures”. (Emerson)“Ensure that the environmental conditions that are within the modified severity level G1 of ANSI/ISA-71.04-1985: a) A copper reactivity rate of less than 30 nm /month b) A silver reactivity rate of less than 20 nm /month”. (Cisco)