_ t 401807 -— So J. H. Harley and Mr. I. B. Whitney ~a DATE: March 27, 1956 3 BE. P. Hardy SUBJECT: NRDL PACIFIC SURVEY - 1956 URINE SAMPLES On March 22, 1956 HASL received 2), urine samples sent by Dr. S. H. Cohn of NRDL*. Volumes ranged from 135 ml to 1 liter so it r fhe total urine sample received was wet aghed using 70% HNO3 “s All data obtained to date are shown in Table l..and summarized by island in Table 2. The highest value obtained from a posled con- trol sample collected at HASL was used for comparison. The following conclusions are tentatively drawn on the basis of these total activity results: 1. Total activity of these urine samples varies from ,,0.5 2. The average and pooled data of samples collected at both Uterik and Likiep are higher than the control. In addi- to 2 times a presumed normal control. tion, the average total activity of urine samples collected at Likiep is higher than Uterlk. 3. The individual data and average results of urines collec- ted on Majuro are significantly lower than results from Uterik or Likiep and below control and expected values as well. Moreover, it may be noted that per 25 ml of urine the residue weights averaged 370 mg with a spread of 135 mg. There is no cor- relation whatsoever among age, activity, and residue weight. # Letter of March 16, 1956 9012064 TS0x | Em L/Migs, 2X aSRA This residue was beta counted for 60 minutes and standardized against 200 mg of K2C03 preparéd and mounted in a similar manner. Detnet watsdashsandy TateobiPie Talatstale a overtLtrce SG hen taken and evaporated to dryness in a one inch glass planchet. SeatMesaiSS from which a know aliquot (equivalent to 25 ml of urine) was gite and H200 added finally to hasten removal of organic material. e remaining salts were dissolved and diluted to a specific volume pielmaryetesoe was assumed that these samples did not all represent twenty-four hour collections as previously supposed.