Cell biology (formerly called cytology, from the Greek ÎºÏÏÎ¿Ï, kytos, vessel) is a branch of biology that studies the different structures and functions of the cell and focuses mainly on the idea of the cell as the basic unit of life.
(B) For a cylinder having a water capacity over 12 pounds-- (1) By hydrostatic test without determination of expansion (modified hydrostatic test method). A retest must be performed 12 years after the original test date and at 7-year intervals; or (2) By hydrostatic test using the water jacket method. A retest must be performed 12 years after the original test date and at 12-year intervals thereafter.
If your short-term test results were 8 pCi/L or above, follow up with another short-term test. If your short-term test results are below 8 pCi/L follow up with a long-term test. Long-term tests will give you a more accurate reading of your year-round average radon level. Step 3.hort-term tests last from 2-90 days whereas long-term tests last from 91 days to 1 year. Various other dynamic testing methods are also available but are generally much more expensive to use. 1  Learn more about types of radon tests. 2  Order a radon test kit online from the American Lung Association of Oregon.