LIST OF TABLES - Cont'd. TABLE PAGE Post Plumbob Soil Collected in California, Nevada and Utah Radiochemical Analyses of Composite Monthly Air Pilter 50 Collectors (U.S. NRL.) 55 High Altitude Air Samples 58 LO Sr?° in New York City Tap Water ll Monthly Sr?° Levels in Powdered Milk from Perry, New York 12 Monthly Sr90 Levels in Liquid Milk from New York City 13 Monthly Sr99 Levels in Powdered Milk from Columbus, Wisconsin and Mandan, North Dakota - vii - 79 83 89