YyDpT UNIVERSITY OF CALIFORNIA RADIATION LABORATORY Ve BERKELEY 4, CALIFORNIA °% wovember 19, 1958 HDT~611~58 Br. Gordon M. Dunning, Chief Radiation Effects of Weapons Branch Division of Bicology and Madicine U.S. Atomic nergy Comission Washington 25, D.C. lef: EMREW:CMD of 11/10/52 Dear Dr. Dunning: HKesponding to your request of November 10, we have gathered together material covering air samples taken outdoors at a nuaber of locations as follows: UCHL-Berkeley Oct. L5-Neve 10, inc. "Daily", one station UCRL-Livermore " " " "Daily*, one station * “ environs (off-site) “weekly", eleven stations General Zlectric Vallecitos Lab, 4, on-site locations California State Dept. of Public Health, Berkeley, one station " * " " " " Los Angeles, one atation We also sutmit data on rain water samples from two sites, viz; UCkL-Berkeley General Electric-Vallecites Factors for conversion of counting information from counts per minute to mierocuries per cc (or whatever) are not crifically examined herein but all air sample data has been expressed in nefwith the exception of General Electricts counts per mimate date taken daily on an integrated basis from samples remaining on stream for one week. The most. extensive data and comparisons exist between our Berkeley and Livernere collections. ‘The basic records are tabulated in axtenso. We have constructed amoothed decay curves for each "daily" sample and extracted the 5, 75, 150 and 300 hour values therefrom for tabulation and graphical presentation below. We call your attention hewever to the fact that certain UCEL off-site “weekly” samples (of actually much less than 1 week's duration) showed considerably higher activity than any other. not graphed. These are tabulated but For your convenience we are including in the original (not in the copies) a road map and a tepographical map assembly, the latter indicating locations of UCAL off~site samplers about the Livermore project.