maximum permissible concentration造句

On Wednesday, the levels of carbon monoxide exceeded the maximum permissible concentration in the region's largest cities _ Khabarovsk and Komsomolsk-on-Amur _ and several smaller towns of the Khabarovsk region, ITAR-Tass reported.
Still, the faucet standard is a deviation from the NSF's usual practice for contaminants that have a maximum permissible concentration; usually it allots each appliance coming into contact with the water a limit of one-tenth the amount of contamination allowed.
It was in the Manhattan District that many of the modern concepts of protection were born, including the rem unit, which took into account the biological effectiveness of the radiation, and the maximum permissible concentration ( MPC ) for inhaled radioactivity.
It's difficult to find maximum permissible concentration in a sentence. 用maximum permissible concentration造句挺难的