1b
bh.
Period 2100, Arril 1), 1955 to 1630, April 29, 1955
CL 562—P
Cl. 563-P
5.
53.5 + 3.3 don total
3hekb + 1.5
"
CL 517-P
Open teh
é7 = 7 dom total
CL 619-—{P
Wiet" ub
72.0 9
Covered tub
34 Q
4
"
YOO dan total
Period 1190, May 13, 1955 to 1139, a 23,
OL 527.2
SL GP8.P
7.
Covered tub
Period 1800, April 22, 1955 te 0°30, Hay 13, 1965
CJ. S18-P
6.
Open tb
Oman tub
Covered tb
SO + 5 dm total
7O+ ©
"
Period 1700, Mav 23, 1955 to 1930, due 6, 1°55
CL 68
CL CUS
CL 6h4
Goon trib
Covered ub
"Yet" two
210 + € ha total
e390 x 12"
"
Zod = &
"
The asreement in total Sr°O activity collected by each of the several
wtanors is
ratifrinz.
The only signific :nt diserevency is the lov value for
CL 563-P * ich micht be explained by tie occurrence of a very hoavy rainzall
“th a possinle resultant loss of sanple due to snlashing off the >olastic
cover,
Another nossibility is the oceurrerce of arv fallowt which conld heve
been bloym off the plastic cover by surface winds.
It asnears that the Sr7?
ic weter svlwile at the time of collection and is net absorved on the walls
the vessels,
It is further indicated that once cenosited in rains, the Sr7O
Yellout does not blow around si
ieantliv,
«
NYOO
These results testify to the adequacy of the water collection and cienical
seraration vwrecetures used and indicate tnat an cnen tub provides for rejliarle
colicetion of vreei-itaticn for extended rericds of time.
Since the Sr acti-
vity is ewmarentiv cuite soluble, large voiune coilecticns can .e se
aliguotted to reduce the saanle shivme-t vroblem,
Thus, the collection of
orecinitation an ears to be a practicabl: metiod to aug-rent, or even revlace,
the sticky paper collector as a general inthod of vorld -ride monitoring
Ss