Debris Cleanup 239 ELLE (NANCY) ISLAND CLEANUP Elle consists of Il acres and was not used during nuclear testing. Vegetation included a dense stand of shrubs 8 to |2 feet tall and a dozen coconut palms. The only hazardous debris was one Master Index item, a piece of pipe projecting from the beach. The planned use for Elle was food gathering. 26 Debris cleanup began on 6 March 1978 and was completed on 19 March 1978. The piece of pipe was removed by explosive demolition, after which there was a police up of small debris. Less than 1 cubic yard of noncontaminated debris, including the one Master Index item, was removed.2?7 BOKEN (IRENE) AND BOKAIDRIKDRIK (HELEN) ISLANDS DEBRIS CLEANUP Boken, and Bokaidrikdrik which adjoins it on the southwest, are comprised of 45 acres and constitute the northernmost landmass of the atoll. They were used for the ground zero of the Seminole shot during Operation Redwing. This event created a crescent shaped shoreline along the western edge of Boken and a large, water-filled crater, 650 feet in diameter, where the event occurred. All that was left of Bokaidrikdrik was a 5-acre sandspit bordering the water-filled Seminole Crater. For practical purposes, there is only one island remaining. Boken also was affected by the Mike and Koa thermonuclearevents but no burial sites for radioactive scrap were known to exist. However, large amounts of contaminated soil were suspected to be buried, impacting on the soil cleanup operations described in Chapter 7. Vegetation varied from medium to dense. Hazardous debris included three corrugated metal arch structures, five concrete bunkers, and miscellaneous metal scrap. There were an estimated 1,312 cubic yards of noncontaminated debris, including 24 Master Index items on Boken and 2 on Bokaidrikdrik. The planned use for Boken was food gathering.28.29 Debris cleanup began on 4 January 1978 and was completed on 12 July 1978. There were 1,905 cubic yards of noncontaminated debris removed.3° Two Master Index items, bunkers from the Ivy shot, located at stations 200 and 600, were discovered to bearrelatively low-level beta contamination which could not be removed without major destruction of the concrete. Based on the well-fixed mature of the contamination, requests for disposition authority other than destruction were submitted, and several attempts were made to remove the beta contamination,