(a) Emissions to the atmosphere from rocket-motor test sites shall not cause time-weighted atmospheric concentrations of beryllium to exceed 75 microgram minutes per cubic meter (μg-min/m3)(4.68 x 10¥9pound minutes per cubic foot (lb-min/ft3)) of air with
CFR 40-61.42-2014 history
2014CFR 40-61.42-2014 Protection of Environment. Part61:National emission standards for hazardous air pollutants. Section61.42:Emission standard.