The uncertainty for attempting to extrapolate the yearly radon concentration from a five to seven day sample is huge: about +/- 90% (at the 90% confidence level) 17. For this reason, a single CC reading (or indeed several) cannot be used to estimate the annual radon exposure in a house.
The Defeasance Clause. As part of a mortgage agreement, the defeasance clause provides the buyer the right to secure the title, or deed, for the property once the debt is paid in full. Prior to that time, the financial institution backing the loan has all rights to the title as it functions as collateral for the associated debt.
The extinguishment of debt. While defeasance technically refers to extinguishment by any method (for example, by payment to the creditor), in practice it is generally used to mean discharging debt by presenting a portfolio of securities (usually, Treasury obligations) to a trustee who will use the cash flow to service the old debt.