This standard prescribes a procedure for sampling fumes generated by welding and allied processes. Because it is limited to health hazard evaluation@ the standard is primarily concerned with sampling at the worker??s breathing zone (see 3.1). It also prescribes procedures for general area sampling of fumes. However@ the sampling methods described by this standard apply only to the sampling of solid particulate matter. ANSI Z49.1@ Safety in Welding@ Cutting@ and Allied Processes@ should be referenced for safe practices to follow when performing welding operations.