Miljøoppfølging av skyting med granater som inneholder hvitt fosfor i Regionfelt Østlandet - overvåkningsresultater for 2009 og 2010

The Norwegian Defence Research Establishment (FFI) was commissioned by Defence Estates Agency, Rental Market Area East, conducted sampling of soil and water in the target area for white phosphorus in 2009 and 2010. In 2008, 2009 and 2010, it has been test fired 88 155 mm artillery shells, 40 81mm mortar shells into the target area Haraåsen. Analysis results of water samples in fixed measurement points around Haraåsen showed that one of the samples contained very low concentration of white phosphorus on the same day as it was fired 88 155 mm shells in the target area. This is probably due to deposition of small particles of unburned white phosphorus from the smoke cloud that formed spontaneously in contact with air. Soil samples taken the same day showed up to 2900 mg/kg of white phosphorus in the craters. In 2010, the highest concentration of white phosphorus in soil samples was 38 mg/kg. This shows that the target area for this type of shooting is suitable as long as the grenades do not end outside the target area.