The phrase "allowable concentration of" is correct and usable in written English.
It can be used in contexts related to regulations, safety standards, or scientific measurements where specific limits are set for substances.
Example: "The allowable concentration of lead in drinking water must not exceed 15 parts per billion."
Alternatives: "permissible level of" or "acceptable concentration of".
The delayed smog rule would lower the allowable concentration of airborne ozone to 60 to 70 parts per billion from the current level of 75 parts per billion, putting several hundred cities in violation of air pollution standards.
Canadian government tests also found that the amount of lead released into a glass of wine in the time a meal can be eaten is well below the Canadian maximum allowable concentration of lead in a beverage, 200 parts per billion.
Thus, the higher the air temperature, the lower is the allowable concentration of F−.
In most of these "single contaminant methods", a maximum allowable concentration of contaminants must be established in water demands and water sources.
As mentioned above, pH played a role in the allowable concentration of ammonia, and there were several instances where pH was measured above levels that are recommended for fresh water organisms (i.e. > 9.0) [43].
The objective is to synthesise and design the wastewater treatment networks (WWTN) that minimises the total annual costs, including operating and capital costs, subject to maximum allowable concentration of contaminant on the effluent in order to fulfil environmental regulations.
That has raised concerns among many environmentalists because it has led the state to increase the allowable concentrations of more than 40 chemicals, like ammonia and nitrates.
The maximum allowable concentrations of diazinon in drinking water in Australia, Canada, Germany, England and America are 20, 10, 0, and 0.6 μg/L, respectively (Readman et al. 1992).
In a bid to reduce the threat, in October 2010 the Department of Labor's Mine Safety and Health Administration MSHAA) proposed reducing allowable concentrations of coal mine dust, lowering the standard from 2.0 milligrams of dust per cubic meter of air (mg/m3) to 1.0 milligram per cubic meter.
The allowable concentrations of contaminants in purified isobutene will depend on its use.
The chemical control laws reviewed below, which evolved during the past 100 150 years, range from controls for pesticide residues to allowable concentrations of chemicals in surface or drinking waters.
