32 C.F.R. § 627.53 Fume hood.
Title 32 - National Defense
Fume hoods in which etiologic agents are handled must use proven technologies to provide optimal containment. Fume hood placement, design, and capture testing requirements for use in designing new laboratories can be found in the latest edition of Industrial Ventilation, A Manual of Recommended Practices, published by the American Conference of Governmental Industrial Hygienists. (a) Description. Fume hoods are common chemical laboratory furnishings designed to capture fumes from chemicals that are used within them. Air is drawn through the opening and vented to the exterior without recirculation. (b) Uses. Fume hoods provide excellent containment for handling hazardous chemicals. (c) Prohibitions. Moderate risk biologicals and open containers of dry forms of toxins must not be used in a fume hood without HEPA filtration. Fume hoods should never be used when sterility is required. (d) Certification and requirements. (1) Inward air flow will be an average of 100 plus or minus 20 lfpm as measured at the face of the fume hood. Proper function of laboratory hoods is not only a function of face velocity. An evaluation of the total operating environment is necessary. (2) When filters are required, they will be certified by the mineral oil droplet (HEPA) or Freon (Charcoal) leak test as appropriate. Leakage through the filters will be less than 0.05 percent for Freon and 0.03 percent for oil droplets when initially installed. (3) Fume hoods will be provided with indicator devices to give a warning should the ventilation system fail or if the hood face velocity falls below an average of 80 lfpm (4) Hood air flow will be certified when installed, when maintenance is performed on the ventilation system, and semiannually thereafter.
Title 32: National Defense
PART 627—THE BIOLOGICAL DEFENSE SAFETY PROGRAM, TECHNICAL SAFETY REQUIREMENTS (DA PAMPHLET 385–69)
Subpart H—Engineering Controls
§ 627.53 Fume hood.
