Historic radium contamination
12. A substance or article is not radioactive material or radioactive waste where the substance or article arises from the remediation of land contaminated by radium and—
(a)the substance or article contains Ra-226 or its progeny;
(b)in the absence of Ra-226 or its progeny, the substance or article would not otherwise be radioactive material or radioactive waste;
(c)the contamination occurred prior to 13th May 2001; and
(d)the concentration of Ra-226 and any progeny resulting from the decay of Ra-226 does not exceed the following values—
(i)for a substance or article which is a solid or a substance which is a relevant liquid, 1 becquerel per gram;
(ii)for a substance which is any other liquid, 1 becquerel per litre; or
(iii)for a substance which is a gas, 0.01 becquerels per cubic metre.