ACTiviTYsmg (ARBITRARY UNITS) DIAMETER IN MICRONS Fig. 5.4 Gross Activity Concentration vs Particle Size rd °o ACTMTY/mg (ARBITRARY UNTS) $Q eo 10 2 $3 6 20 so DIAMETER IN MICRONS 100 200 Fig. 5.7 Activity Concentration of Cat5 vs Particle Size 43 SECRET — RESTRICTED DATA