qT i | | Toff | ) = , a 500 E A | q \ _——X a Kom x \ — \ / \\ ay 7 a 4 S\/ Te ‘Y of SECOND-DAY SAMPLING — \ x 3 ny mas or GAMMAACTIVITY, DIS/ MIN _ / pe : ae a ™ — K THIRD-DAY SAMPLING _ bee — 50 | — x a ASN, Le FIRST-DAY SAMPLING | - q Lo a = TT)-- T T BACKGROUND ~ H— =X = AIR FILTER, TOTAL y DIS/MIN PER 104 CU FT (10°) — | @ = PASSIVE COLLECTOR, RAIN, TOTAL y DIS/MIN (10) _ © = PASSIVE COLLECTOR, NO RAIN, TOTAL y DIS/MIN (10% Ce MAY KAY R13) MID CATT CAS DGL ORN GLN_ SITE ee PEP WHT | ANT i Fig. 7—Sedan total gamma activities (mobile line sites; see Fig. 1 for meaning of abbreviations). sequent days. With this restriction in mind, Fig. 7 reveals the collection of fresh activity at all sites on the first day of sampling with higher concentrations in the southern half of the line. The activity on the second day is diffused throughout the arc with concentrations again generally higher in the southern sector. Prominent peaks are observed for the ‘72-hr fallout-collector samples at Douglas and Antelope; significantly, both these samples contained a large rainfall