“ Fig. |: S90 Surface Air Concentration NRL, Washington D.C. 700 r— 600 }— DPM Sr2% 10° Ft 3 oO oO S OQ oO - 900 F- oO 200 ;— 1953 1954 and Dec > 3 Sept| June om 3 <q Dec lOO+—- June| + aeEEanes 800 1955
“ Fig. |: S90 Surface Air Concentration NRL, Washington D.C. 700 r— 600 }— DPM Sr2% 10° Ft 3 oO oO S OQ oO - 900 F- oO 200 ;— 1953 1954 and Dec > 3 Sept| June om 3 <q Dec lOO+—- June| + aeEEanes 800 1955