. . . . . . DEVELOFLIENT ASSOCIATED OF SOILCONCENTR.4T l\riTH hfPC FOR ’39’ IONS 24*PU IN AIR . . LLL RESUSI?EXSIOX-FA4 CTOR APPRO.4CH hW3S - ~ADING APPROACH L4-5483 . 1, 000 pci/g 600 pCi/g - MS+ — ~“A PROPOS E33INTER_U\l STANDARD BY J, W. EEALY FOR PLTJ TOXIUM IN SOILS, “ XXTHE VALUE 4oo pci/g W-4s REcOMMEhTDED FOR ALL PARTICLE SIZES PROVIDED NO MORE THAN 200 pCi/g in <100 MM SIZE FRACTION.