Field Performance Measurements of Half-Facepiece Respirators—Paint Spraying Operations

This article presents the results of a workplace protection factor (WPF) study for half-facepiece respirators conducted in an aircraft paint-spraying operation. The major elements of the paint overspray collected with ambient samples were titanium, strontium, chromium, and silicon. The major elements collected on the in-facepiece samples were chlorine and silicon. The geometric mean (GM) ambient concentrations of chromium and titanium varied significantly among painting locations and paint types. There was a significant difference in GM in-facepiece concentrations of titanium among painting locations. However, no significant difference in GM in-facepiece concentrations of chromium by location was found. In both ambient and in-facepiece samples the amounts of chromium and strontium were highly correlated as expected. In ambient samples total airborne mass was highly correlated with levels of chromium and titanium when primer and top coat were applied, respectively. No difference in respirator performance, ...