Exhibit L Page 2 PRIVACY ACT MATERIAL REMOVED Le ae To: L.H. Hempelman, H-Div. ’ 5/24/28, Bubj: "Dosage Estimates on Sandstone Personnel eeson Intervievse with 2 An alternate estinate is nats as follova: ReeUIS 1 Mov gancmas ‘trom the fission products. Then 2x 109 o quants per & is the conversion constant from quantato roentgens. “Assune et 2 hrs 33 per Yenitted. The second filter paper then gives 2 x 10? x 7x 103 #14 x 2033 yfur orl. h x 0/3/3600 = 3.9x 107 yfeco. and st 3B/ f ve get 3 x 3.9 x109 21.1% 1a fae per sheet total. This result is of the same orisr of magnitude as the estinate given above end agrees vith it closely. We concluted that the filter papers at 2 hre tims after sero hed Bactivities total which were of the order of 1/2 curie or leas, 3. We now compute the required beta us and tims rejuired per on” to give a dose of 500 rep at a depth of 2 to 3 mm. The experimental data shov that independently of beta energy (0.5 to 3 Mev) the depth dose at depths are as Yollows: 2 - 3 mm depth, 2.14 x 10+ rep/sec/l pep/em® (P32) 3 - & mm depth, 7. x 10°? rep/sec/l pop/on® (p>*) in order to get 500 rep to the 2 - 3 mm depth we require then, 500/2.14 x 10" = 2.3 x 10° Ppo-secs/cn” It is known that the personnel wore their glovea for 9 minutes or 5400 secs. This means that the density of beta activity would be 2.3 x 20°/5400 « KES pe/en® If we round this figure out to 500 yc /on® and assume an eotivity of 0.5 curies on a filter aheet then 0.1% of the activity on a sheet is needed to get from the filter tol on® of glove to produse the dose required above. PRIVACYACT MATERIAL REMOVED COPIEDnar znIbit , -2- REE - = Tr Ts 7 A S