{"data":{"id":"us/40-cfr-61.42","jurisdiction":"us","citation":"40 CFR 61.42","heading":"Emission standard.","body":"(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.\n(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).","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 61—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS","Subpart D—National Emission Standard for Beryllium Rocket Motor Firing"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"e35867c735ef1a23d4949295a25757ac6306ac5c8e8eafe9ea70d68c9fbc4999","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-61.41","next":"us/40-cfr-61.43"},"notice":"GroundRules: Original legal text. Not legal advice."}