▁The ▁w rist s ▁and ▁an k les ▁are ▁t aped ▁down ▁with ▁mask ing ▁t ape . ▁ ▁Occ asion ally ▁a ▁pl astic ▁rain co at ▁is ▁also ▁worn . ▁ ▁Rem oval ▁of ▁the ▁gar ments ▁( into ▁several ▁bar rel s ) ▁is ▁a ▁complicated ▁process ▁which ▁must ▁be ▁performed ▁in ▁an ▁exact ▁sequence . ▁ ▁O ften ▁a ▁health ▁phys ic ist ▁is ▁present ▁in ▁the ▁work ▁area ▁to ▁observe ▁good ▁anti - cont am ination ▁practices . ▁ ▁References ▁ ▁Category : Environment al ▁su its ▁Category : C lean room ▁technology ▁Category : G own s <0x0A> </s> ▁Per cy ▁Warner ▁( 1 8 6 1 – 1 9 2 7 ) ▁was ▁an ▁American ▁business man ▁from ▁Nash ville , ▁Tennessee . ▁He ▁was ▁active ▁in ▁public ▁utility ▁across ▁the ▁Southern ▁United ▁States . ▁ ▁Early ▁life ▁Per cy ▁Warner ▁was ▁born ▁on ▁March ▁ 4 , ▁ 1 8 6 1 . ▁His ▁father , ▁James ▁C . ▁Warner , ▁was ▁the ▁owner ▁of ▁min ing ▁interests . ▁He ▁had ▁a ▁brother , ▁Ed win ▁Warner . ▁He ▁grew ▁up ▁at ▁ ▁Ren raw , ▁a ▁m ansion ▁in ▁East ▁Nash ville . ▁ ▁Career ▁Warner ▁started ▁his ▁career ▁by ▁working ▁for ▁his ▁father ' s ▁min ing ▁business . ▁ ▁Warner ▁served ▁as ▁the ▁President ▁of ▁the ▁Nash ville ▁Railway ▁and ▁Light ▁Company , ▁which ▁controlled ▁the ▁street car ▁system ▁in ▁Nash ville . ▁He ▁res igned ▁in ▁ 1 9 1 4