i EG:G ey Energy Measurements Group ¢ Las Vegas Operations 680 E SUNSETROAD, LAS VEGAS, NV ® TEL (702) 739-0461 ® MAIL BOX 1912. LAS VEGAS. NV 89101 21 February 1979 RSSD-79-051 410701 Dr. W. L. Robison (L-453) Lawrence Livermore Laboratory Environmental Division Livermore, CA 94550 Dear Bill: Enclosed are the preliminary external exposure rate results for Bikini and Rongelap Atolls. The results for Rongelap are summarized in the same manner as those 1 gave you several weeks ago for the other atolls surveyed. For Bikini we have enclosed a complete set of data along with a complete set of island photographs. Also enclosed are some additional atoll mosaics which you might find useful. We only had one spare mosaic for Rongelap and Utirik Atolls. We would be glad to print some more copies of these two atoll mosaics if you find yourself short. A conversion scale is attached which should be used for all the data you presently have as well as the Bikini and Rongelap data. Please let us know if you have any questions about the data. Sincerely, fe W. J. Tipton Scientific Specialist WJT:s1 Encls. -