.pld Extension - List of programs that can open .pld files In the following table, you can find a list of programs that can open files with .pld extension.This list is created by collecting extension information reported by users through the 'send report' option of FileTypesMan utility.
According to a national residential radon survey completed in 1991, the average indoor radon level in the United States is 1.3 picocuries per liter (pCi/L). The average outdoor level is about 0.4 pCi/L. Excessive radon levels have been found in all of the 50 states.
It is also important to understand that these maps are showing the estimated likelihood that a property will contain radon levels in excess of the âaction levelâ of 200 Bq/m3 â they do not show how high the radon levels may be. For example, the report that you receive from your solicitor might state that the property you are looking to buy is located in an area where 1-3% of properties are estimated to be affected by radon. This tells you that if there are 100 houses in that area, between 1 and 3 of them are expected to have radon levels over 200 Bq/m3 where it is advisable to carry out remedial works.