This technical report includes (1) World-wide Network (Maps). (2) Fallout of Sr90 at selected sites during June and July. (3) Comparison of Sr90 collection by gummed paper and pot on the roof of the New York Operations Office March through July. (4) Sr90 contamination of cow's milk in Metropolitan New York. (5) Sr90 content of the upper air prior to Castle. (6) Sr90 contamination of pooled fetal bones collected during June from the Metropolitan Area. (7) Sr90 contamination of water supply in the Metropolitan Area June and July.

At present there are three Laboratories actively engaged in analyzing samples for the "SUNSHINE PROGRAM"; Lamont Geological Observatory, University of Chicago and the New York Health and Safety Laboratory. The U.S. Department of Agriculture Laboratories at Beltsville ae preparing samples for the University of Chicago, and are running normal strontium analyses. In order that the results reported from each of the three laboratories may be used to evaluate Sr90 distribution, a cooperative program has been in operation since August of 1953. This preliminary report lists the results on samples received and distributed by HASL. It is hoped that complete results from all laboratories will be available soon.

This technical report includes (1) World-wide Network (Maps). (2) Fallout of Sr90 at selected sites during August. (3) Comparison of Sr90 collection by gummed paper and pot on the roof of HASL during August. (4) Sr90 contamination of cow's milk in Metropolitan New York. (5) Sr90 content of the upper air during April, May and June. (6) Total activity measurement of the upper air after the Castle Test series. (7) Sr90 content of tap water at HASL before the Castle Test series. (8) Sr90 content of urine and fetal bone in the metropolitan New York area during August.