PRIVACY ACT MATERIALREMOVED fo: neers — L.H. Hempelmann, H-Diy., 5/24/%8, Bubjs Personnel Based on Interviews with . : Exhibit 1 age 3 "Dosage Estimates on Bandstone _ . i "he Kow we compute the source strength of the griny, greasy or soct-like substance vhich the men got fron lifting the filter unite. It vas visible as black gunk on the white cottan gloves, " Also, ® monitor had varned that thei: gloves vere hot. There are not specific data on this gamma measurement af the hotness of the gloves. ‘Suppose however that a gamma reafing of 0.5 mR/hr were found at 1 meter distance. This is a low reading compared to the 20R per hour mentioned by es having been measured by Yan der Oriff at 25 feet from the nose of a plane. The reading of 0.5 mR/hr at 1 meter becomes 5 x 10" nR/br @ 1 om assuming @ point source. From section 2 above we have 1.1 x 10? B epn/ 7/mR/hr which leads to; eo Ll x10? x 5x 10° 5.5 x 109 B op = 8.4 x 20° Bocps total activity on glove or * 220 B pe total glove activity The valus of 220 B pe on the glove falls within the order of magnitude of beta activity reyguired on the gloves in order that a beta dose of 500 rep at the 2 - 3 mm depth be delivered. It also is a very amall fraction of the total activity gathered on the filter papers. é 5, Which source of radiation, namely: handling the filter papers or smear- ing the black gimk on gloves, is the major contributor isa a matter of coni jecture. For instance, Btanley helped lift down & filter boxes, then removed his gloves and bare-handed helped prepare about 20 filter papers for shipment. On the other hand, Lang lifted 6 filter boxes and helped staple papers keeping his gloves on all the while axcept for a changes of gloves after lifting COPIED/DQE. LANL RO” | » 7 re ~-3- : PRIVACY ACT MATERIAL REMOVED 26