Twenty-nine portable GM meters for hand monitoring at the smaller canneries were borrowed from the California State Civil Defense Organization by the UCLA-AEC Project. The biophysics branch at UCLA assumed the responsibility for the operation, maintenance and repair of the hand and automatic instruments. The alarms of the automatic instruments were set at 2X background (O.--mr/hr. or 500 c/p/m.), namely .02 mr/hr (1100 e/p/m) for a 6-inch wide fish. The monitoring was started at all plants on May 12, 1955. Hand monitoring by the deputy Food and Drug inspectors was discon= tinued on July 7, 1955, and the ANC automatic counting units were removed from large plants on August 3, 1955. The automatic counting units have been overhauled and stored at the UCLA-AEC Project for future emergencies on the west coast. From May 12 to August 3, 1955, a total of over 9 million powds of fish and fish products were monitored as shown by the following table. Terminal Variety Island Anchovies Mackerel Shark Livers Shark Fins Tuna (pre-biast) Tuna (post-blast) 209 500 2 9 193,500 8l,,500 15 ,000 16,850,000 16,691,000 San Diego Monterey Total 11,000 = ~ 209 , 500 2 520,500 - - 15,000 ~ 10,402,000 2,713,000 - ~ 344,000 8),500 27,252,000 19,748,000 (All figures are in pounds) Total Tuna Monitored 17,001,000 Total Fish Monitored 9,514,500 pounds Other Fish Monitored 2,513,500 No radioactivity was detected in fish caught in the Wigwam area or eastern Pacific. Three special problems occurred during the monitoring profram. (a) On June 13 the South Coast Cannery unloaded a shipment of 377 (12,580 lbs.) frozen yellow fin tuna imported from Yokohama, Japan, via San Francisco. The automatic counting instruments detected radioactivity in four fish of the total shipment. One of the four exhibited readings greater than 0.10 mr/hr at four inches from all body surfaces. Inside the oral cavity readings of 0.2 to 0.5 mr/nr were recorded. four fish The were impounded and the remainder of the shipment was released