Readily available in both lasting and also temporary tracking, the examinations are very easy to use and require very little setup. " The examination is reputable as well as inexpensive-- it does not take brain surgery," says Costs Wehrum, an administrator at the EPA's Office of Air and Radiation. If a first short-term examination registers 4 picoCuries per litre (pCi/L) or higher, the EPA suggests doing a second radon test. If a 2nd test signs up over 4 pCi/L, think about taking steps to lower radon degrees in your house, the EPA cautions.