Permissible levels of systematic errors (type-B uncertainty) depend on dosimetry purposes (most-probable or conventional) and variability of biological responses.
The results of our numerical simulation show that the standard deviation of the estimation error of the "weighted average with iteration" scheme is mostly within permissible level of ±0.002 in-water reflectance at 443 nm, reducing the error by roughly a factor of 2 compared to the other schemes.
The maximum permissible level of acrylamide in American drinking water is 0.5 parts per billion, or 0.5 micrograms per litre.
The sensor exhibits lower detection sensitivity than the WHO permissible level of 1.12 nM phenanthrene in wastewater.
At that time it adopted rules setting the permissible level of fibers of asbestos at 120 for each 10 cubic centimeters of air in the workplace.
The WHO (2006) suggested that the permissible level of potassium is 200 mg/l.
K and Ca concentrations were under the permissible limit, except three samples during pre-monsoon season exceeding the permissible level of Ca 75 mg/l.
Regulators say the vehicles they tested emitted 10 to 40 times the permissible level of 70 milligrams per mile.
Note that the maximum permissible level of fluoride in China is 1 mg/L (SEPA 2007).
According to European Union the permissible level of lead in vegetables are 0.1 to 0.3 mg/kg [ 90].
Clearly, what may constitute permissible levels of asbestos in the air will add up to significant quantities on the ground.
