level 10 feet (3 meters) above the water surface was 0.025 to 0.075 R/hr. Staffing: One military and nine civilians, six from SRI, one from AMS, one from Raydist, and one from H&N, were associated with this project. Their exposures appear in Table 19. Exposures for person- nel from other task groups appear in Tables 58, 86, and 90. Project Report: Reference 60. Project 3.3 -- Blast Effects on Tree Stand Agencies: U.S. Forest Service (USFS) Ballistic Research Laboratories (BRL) Operations: To determine blast effects on tree stands, natural stands on Jelete, Lukoj, and Enidrik were used as indicators of effects. Be- cause of expected contamination from BRAVO and ROMEO, all project work was completed before BRAVO except arming of gauges. BRL (Project 1. 2b) installed self-recording, static, overpressure, and dynamic pressure gauges. Participation was planned for KOON only, but the unexpectedly large radius of @ffects from BRAVO provided additional data. Shots: BRAVO, KOON (Bikini). Radiation Exposure Potential: Possible exposure for those making post- shot inspection photographs of tree stands. Staffing: Two civilians, both from USFS, were associated with this project and received 3.040 and 2.825 R. Project Report: Reference 61. Project 3.4 -- Sea Minefield Neutralization by Means of a ' Surface-Detonated Nuclear Explosion Agencies: Operations: Bureau of Ordnance USS Shea, USS Reclaimer, USS Terrell County One hundred twenty-one inert sea mines were planted in seven rows between 3,000 feet (914 meters) and 13,800 feet meters) from ground zero. (4,206 Mines were laid on 10 to 13 April and on 185