PRIVACY ACT MATERIAL REMOVED Exhibit A Page 3 , Memo to D. Froman, 6/10/48, subj: "Rediation Burns of J-2 Personnel” (Cont'd) I instituted a change in the sequence of events with the purpose of ° lessening the exposure of the men. Whereas on X-ray day the filter paper was removed from the top filter unit as soon as a plane had landed, om yoke day the top filter unit vas removed and placed on the ground as the planes landed, but the removal of the filter paper holders and the collectian of the filter paper was deferred wtil after all the planes had landed. This meant that work vith the first filter papers was deferred for approximately one and one half hours, and consequently the radiation from the filter peper at this time vas less by a factor of about three over what it would have been if the X-ray procedure had been followed. In addition, the monitoring cf the individual filter papers, while thsy were being held in the tongs, was eliminated. Instead, only one of the filter paper holders was monitored. This was done by carrying an ioniration chamber to within about one foot of ths holder as it rested on the ground. During the yoke operation the work was divided. Albright anéd I pulled the lanyards to release the top filter units as the planes landed. This operation gave the greatest gamma exposure, and Warren trans- ferred the filter unit from the special lift to the ground. This operation gave the second highest gamma exposure on yoke day, since the disassembly | of the filter units (which had been the second hottest operation on X-ray day) was postponed until after ali the planes had landed. After the planes had all lended, the top filter units had been removed end vere on the ground, but the units had not been disassembled and the bottom filter units vere still on the planes, and I then velked down the line of these filter umits and removed the filter paper holders. We then walked from plane to plans removing the bottom filter units and detaching the filter paper holders from each unit. After this, we left to shower and change clothes. end Werren followed down the line of filter units and removed the paper from the detached holders. was present during the I-ray cperation and therefore was asked to remove the first filter papers from the holders and dexamstrate the use of the tongs. After this demonstration, most of the filter papers were collected by Sattizahn and Warren, while paper holders. was collected. Since monitored the These men showered and obanged clothss as soan as the paper ' received beta burns on his hands during the yokes operation, it is pertinent to point out that the use of tongs for handling the filter paper was abandoned early in the yoke operation and the paper was then carried by band. Glovee vere again furnished by the Rad Safe unit end these were worn and changed oocasionelly by the men. The Zebra Operation. ~ veplaced and Werren during the zebra operation. Otherwise, the personnel were the sane es for yoke. The work was divided exactly as it was during ths yoxs opereticn, COPIED/DOE LANL RO = Exhibit A age fe PRIVACY ACT MATERIAL REMOVED