UNIVERSITY OF CALIFORNIA 4083S S RADIATION LABORATORY BERKELEY 4, CALIFORNIA Bldg. 4, jm. 203 AIR MAIL Apr. 10, 1959 MDT~216-59 CONFIRMATION OF TELETYPE SENT 1:30 PM THIS DATE Dr. Ge. Le Gunham Division of Bioloyy and Hedicine UeS.AK.C. Yashington 25,5 BEST COPY AVAILABLE B.C. Daily 24 hour filter samples of outdoor air collected April 7th and 8th and stored 46 hours exhibit beta~gamma activity 12 times background further estimated at 21 micromicrocuries per cubic meter sir. Be De Thaxter Health Chemistry HOT/ce ¢c3 Diophysice Eranch, GEM, USAC, WASH, DC SFOO-AEC, Mr. Rod Southwick Mr. Dan Wilkes, 101 Sproul Hall, Campus Bee:” MDT Teletype Ofc, B. 29, R.208 y ‘ of } a4 yl ' it is é Ut af . r