1.1 This practice covers a procedure for sampling airborne particulate matter larger than 5 m in size. The method is designed to be used in specific areas, commonly called cleanrooms in the aerospace industry, where aerospace fluids are handled. No This practice establishes the standard procedures (including apparatus, reagents, and materials to be used) for taking samples of airborne particulate matter in a specific area in the aerospace industry, commonly called the cleanroom, where aerospace f