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Duration Code
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Description
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Indicated (Observed or Calculated)
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<
Length
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Unit
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1 
1 HOUR 
O 
1 
HOURS 
2 
2 HOUR 
O 
2 
HOURS 
3 
4 HOUR 
O 
4 
HOURS 
4 
6 HOUR 
O 
6 
HOURS 
5 
8 HOUR 
O 
8 
HOURS 
6 
12 HOUR 
O 
12 
HOURS 
7 
24 HOUR 
O 
1 
DAYS 
8 
1 MONTH 
O 
1 
MONTHS 
9 
3 MONTH 
O 
3 
MONTHS 
A 
1 WEEK 
O 
6 
DAYS 
B 
3 HOURS 
O 
3 
HOURS 
C 
COMPOSITE DATA 
O 
1 
DAYS 
D 
YEARLY 
O 
1 
YEAR 
E 
INTEGREATED PASSIVE 2WEEKS 
O 
14 
DAYS 
F 
INTEGREATED PASSIVE 3WEEKS 
O 
21 
DAYS 
H 
5 MINUTE 
O 
5 
MINUTES 
I 
10 MINUTE 
O 
10 
MINUTES 
J 
15 MINUTE 
O 
15 
MINUTES 
L 
INTEGRATED PASSIVE 4WEEKS 
O 
28 
DAYS 
V 
COMBINED 24HR 
C 
1 
DAYS 
W 
8HR RUN AVG BEGIN HOUR 
C 
8 
HOURS 
X 
24HR BLK AVG 
C 
24 
HOURS 
Y 
3HR BLK AVG 
C 
3 
HOURS 
Z 
8HR RUN AVG END HOUR 
C 
8 
HOURS 