cr ol Location Seem, mn be a ‘ . Ty ‘7 Aeetion __tt. weiok=. rote E Niwe isi EnefF _ Edvard F,Wortmann, SP-1 June 28, 1954 Charles D. Blackwell, Alt, Leader Gen. Monitoring Section, H-1 CONTAMINATED TRAILERS FROM OVERSEAS TESTS. E-1 410665 BEST COPY AVAILABLE Trailers bearing the following numbers: J-16-3, J-16-6, J-15-5, J-16-& and J-16-4, were monitored for contamination and ell were found to have contamination of varying degrees. The interior of the trailers are phrsically dirty and should be washed at our decontamination pit as per telephone conversation on June 28, 1954. The trailers contain sand end dirt from overgeas that, should decontaminate without too much effort to a very low val. According to informetion from Ben Meadows of J-Division, "the trailer exteriors heve already bsen scrubbed se the possibility of renoving further contenination shert of sand-blasting is very unlikely. Ewipes vere mede of the hottest spots end no contemination would rub off. If sandblasting is used to clean the trailers before pointine, approved respirators should be worn as much fron senddlesting effects as from the results of contamination. We feel thet the contamination presents no health hazard, but that it is desireable to avoid even small amounts of contamination whenever pessible. It would probably be wise to inform personnel who will be working on the trailers of the contamination levels so that necessary steps can be teken. Below ere a list of readings taken with SM-% bete-gemma survey instruments. Treiler No. J-16-3 . J-16-6 - J-15-5 Position Beta + Gomrma Roof .1 - 12 mrfhr Sides .5 - 4 mr/hr Under Side .05 - 3 Inside 0 - 1 mrfnr .15 mr/hr G Under Side .05 - 2mr/hr B & G Inside .05 - 2 mr/hr B & G .15 mr/hr @ .05 mrfhr G Sides .5 - 6G mr/hr B & G Roof .1 - 7 mrfnr B&G Sides .05 - 3mrfhnr B&G Roof Sides oi - tr, 3 .05 - Under Side os .5 mr/hr G .15 mr/hr G .1% mr/hr G .05 mr/nr G Roof .1 - 7 mr/br B&G Under Side .0 Inside .05 J-16-8 B&G B & G mr/hr B&G B&G Gemma Cutside 0 - r/nr .15 mr/hr G > -l mr .l mrf/hr G