Working level month (WLM) definition

Working level month (WLM) means an exposure to one working level for 170 hours and calculated as 2,000 working hours per year divided by 12 months per year and is approximately equal to 170 hours per month.
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Working level month (WLM) means a unit of exposure used to express the accumulated human exposure to radon decay products. It is calculated by multiplying the average radon progeny concentration in working levels to which a person has been exposed by the number of hours exposed and dividing the product by one hundred seventy hours per month.
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Working level month (WLM) means a cumulative exposure to radon decay products calculated by multiplying the radon daughter concentration in units of working levels by the number of hours exposed and dividing by 170.
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More Definitions of Working level month (WLM)

Working level month (WLM) means an exposure to 1 working level for 170 hours - - 2,000
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Working level month (WLM) means a unit of exposure used to express the accumulated human exposure to radon decay products. It is calculated by multiplying the average radon progeny concentration in working levels to
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Working level month (WLM) means an ex- posure to one working level for 170 hours.
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Related to Working level month (WLM)

  • Working level month (WLM) means an exposure to 1 working level for 170 hours (2,000 working hours per year divided by 12 months per year is approximately equal to 170 hours per month).

  • Working level (WL) means any combination of short-lived radon daughters in 1 liter of air that will result in the ultimate emission of 1.3E+5 MeV of potential alpha particle energy. The short-lived radon daughters are—for radon-222: polonium-218, lead-214, bismuth-214, and polonium-214; and for radon-220: polonium-216, lead-212, bismuth-212, and polonium-212.

  • Sound level meter means an instrument which includes a microphone, amplifier, RMS detector, integrator or time averager, output meter, and weighting networks used to measure sound pressure levels.

  • Building level or district level leader means an individual employed by the District whose job assignment is that of a building level or district level administrator or an equivalent role, including an administrator licensed by the State Board of Education, an unlicensed administrator, or an individual on an Administrator Licensure Completion Plan. Building level or district level leader does not include the superintendent, deputy superintendents, associate superintendents, and assistant superintendents.

  • Minimum Level (ML) means the concentration at which the entire analytical system must give a recognizable signal and an acceptable calibration point. The ML is the concentration in a sample that is equivalent to the concentration of the lowest calibration standard analyzed by a specific analytical procedure, assuming that all the method-specified sample weights, volumes and processing steps have been followed.