ae us he ry - ir samples taken daily BM, T, W, Th, P and F = M at 4 CFM thee 4° x 9% H¥=70 paper at Building 70 air intake. Beta-gamma activity estimated periodically thereafter by disposing collections about Geiger tube in 1" thick lead pig. Conversion to muc/m? is obtained by the expression counts/minx 15.9 m > eaploying an average of 6 counting determinations for 1 minute for each entry. The instrmment is standardized daily to a u238 fois cylinder sealed in epoxy resin. Background is 20 counts per minute. Aipha activity is Getermined on a proportional chamber gas-flow counter standardized daily to Pu*39, Background is 1 countAain. University of California Ernest G. Lawrence Radiation Laboratory = Livermore, California Air samples are taken daily on site and counted as described for UCRL- Berkeley (above) with the exception of a slightly different conversion factor, wizs counts/min x 17.9 m » Their Building 125 intake is the sampling location. “Weekly” samples are taken using identical equipment and rates at 11 stations beyond the site (see topo map) and counted as above. During the Oct. 31 = Nov. 1 period sampling was intercepted prematurely to gain prompt data concerning the substantially higher fallout experienced.