Baldwin TD and Hicks TW, Assessment Calculations for Human ...

Event/Exposure PathwayExternal irradiationRadon inhalationEvent B7: Smallholding.Inhalation ofcontaminated dustIngestion ofcontaminatedmaterialExternal irradiationDescription0977-6Version 1The house is built on contaminated ground and contaminated material ispresent in garden soil. As a result, a site occupant is exposed to externalirradiation while indoors and outside. The concrete floor of the houseprovides some shielding from gamma radiation.The house occupant is exposed to radon emanating from contaminatedmaterial beneath the house.Contaminated material is left on the ground at the site after construction ofthe smallholding. The contaminated material is mixed with soil byploughing. Wind action generates contaminated dust and the smallholderis exposed to the dust while outside.The smallholder ingests contaminated foodstuffs as a result of growingcrops and keeping animals on the site. The smallholder also inadvertentlyingests contaminated soil while working outside.The house is built on contaminated ground and contaminated material ispresent in soil. As a result, a site occupant is exposed to externalirradiation while indoors and outside. The concrete floor of the houseprovides some shielding from gamma radiation.Radon inhalation The house occupant is exposed to radon emanating from contaminatedmaterial beneath the house.Event C1: Informal scavenging.Inhalation ofcontaminated dustIngestion ofcontaminatedmaterialExternal irradiationEvent C2: Organised material recovery.Inhalation ofcontaminated dustIngestion ofcontaminatedmaterialExternal irradiationAt the time the site is being revealed by coastal erosion, a scavengercollects material from the site. While on site, the scavenger inhalescontaminated dust.The scavenger inadvertently ingests contaminated material (e.g. throughhand-to-mouth contact and licking of the lips).The scavenger is exposed to external irradiation while in proximity towastes revealed by erosion. The scavenger is also periodically exposed toexternal irradiation from items recovered from the site and kept at home.At the time the site is being revealed by coastal erosion, materials aretargeted for organised recovery. While on site, a worker inhalescontaminated dust.A worker inadvertently ingests contaminated material (e.g. through handto-mouthcontact and licking of the lips).A worker is exposed to external irradiation while in proximity to wastesrevealed by erosion.Galson Sciences Ltd 6 21 March 2011