40 CFR 61.42 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (§ 61.01 To § 62.16050) — Environmental Protection Agency (Continued) (§ 61.01 To § 62.16050) — Air Programs (Continued) (§ 61.01 To § 62.16050) — National Emission Standards For Hazardous Air Pollutants (§ 61.01 To Appendix E To Part 61) — National Emission Standard For Beryllium Rocket Motor Firing (§ 61.40 To § 61.44) — Emission standard.

(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/m ³)(4.68 × 10−9 pound minutes per cubic foot (lb-min/ft ³)) of air within the limits of 10 to 60 minutes, accumulated during any 2 consecutive weeks, in any area in which an adverse effect to public health could occur.

(b) If combustion products from the firing of beryllium propellant are collected in a closed tank, emissions from such tank shall not exceed 2.0 g/hr (0.0044 lb/hr) and a maximum of 10 g/day (0.022 lb/day).