SOIL SCREENING LEVEL ASSUMPTIONS MASS LOADING - 100 yq/m? PARTICLE SIZE DISTRIBUTION IN AIR - CHEPIL DATA FROM DUST STORMS SOIL ENRICHMENT - ROCKY FLATS DATA (ZF)G) = 1-06 ~ 2-34) 4. INFINITE AREA NO RESTRICTIONS ON LAND USE CONC. = 1 MRAD/YR = 2-6 x 1072? Cr/m?