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Just a word of caution you cannot use Becquerel’s to asses contaminated land as this is mearly the number of radioactive decays per second

The measure you are interested in is milli seiverts which is a measure of the radioactive dose which is dependant on the source type and energy of the radiation aswell as the number of decays per second

e.g. activity of natural potassium is about 31 Bq/g Since a typical banana contains about half a gram of potassium,^[4] it will have an activity of roughly 15 Bq The absorbed radiation dose depends on the type and energy of the emitted particles, as well as on the location of the source in the body (external, inhaled, ingested, etc.). According to the US Environmental Protection Agency (EPA), the conversion factor (CEDE) is 5.02 nanosieverts over 50 years for each becquerel of isotopically pure potassium-40 ingested by an average adult

Thanks

Gareth Rees _{Mgeol (HONS) FGS}
Contaminated Land Officer

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From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Ivens, Rob
Sent: 21 September 2012 14:21
To: [log in to unmask]
Subject: Radioactive contaminated land

Dear all,

I have googled radioactive contaminated land guidance but I cant find it.

I must be being very thick. Can any one help!!!

My real question however is re the level at which land is deemed to be effected by radiation re SPOSH?

Or background levels in Becquerel’s

The reason for this is we are doing a large site through planning and they are suggesting 0.4bq/mg

And I have no basis to compare this to.

Thanks.

Rob Ivens

So much to read so little time.

01306 879232

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