IS 5182-5, or Methods for Measurement of Air Pollution, Part 5: Sampling of Gaseous Pollutants, is a legally binding document that provides guidance on how to sample gaseous pollutants in the air:
Sampling points
To determine the concentration of a pollutant in the air, samples should be taken from multiple strategic points.
Sampling station location
The sampling station should be at least 1.5 meters above the ground, but no more than 15 meters. It should be away from large buildings and other sources of pollution. Public buildings like hospitals, schools, and police stations are often good choices because they are accessible and secure.
Number of stations
The number of stations in the sampling network depends on the purpose of the investigation and the availability of equipment and analytical facilities.
Rounding off
The final value of a test or analysis should be rounded off in accordance with IS 2:1960.
The Bureau of Indian Standards (BIS) originally published IS 5182-5 in 1975. The 2020 version of the standard is a first revision.
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