Table 4 STRATOS PHERIC RADIONUCLIDE CONCENTRATIONS ALTITUDE (KM) FLIGHT DAY HASL NUMBER COLLECTION UNIT ANALYTICAL LABORATORY 21 16 3011 D7-1 TLW 24 01 2999 D7-1 TLW 27 08 3001 D7-1 TLW GROSS GAMMA (CPM/KSCM) 1298 .O0# 1756 .7# 608.2 TRON=55 STRONTIUM-89 STRONTIUM-90 ZIRCONIUM-95 CERIUM-144 POLONIUM-210 PLUTONIUM-238 PLU TONIUM—23 9 4200 285A 543 635 4720 1.94A 8.37 13.0 Az: Be *s #<¢ * 282 1O9A 943 1.76B 7.03 5.80 * 97.2 * 118 1.04B 6.82 2.37 One Standard Deviation of Counting Error is »20% to 50% of count. One Standard Deviation of Counting Error is +50% to 100% of Count. Standard Deviation Greater than Data Value. Gross Gamma Count More than Two Weeks After Collection. ' eae - 69 - II BALLOON SAMPLES COLLECTED DURING SEPTEMBER 1968 LATITUDE, 31N SAN ANGELO, TEXAS