Minimum Test Times for Various
Manholes/ Depths
| ||||
---|---|---|---|---|
Depth
|
Diameter
| |||
(feet)
|
48 inches
(time in seconds)
|
60 inches
(time in seconds)
|
72 inches
(time in seconds)
| |
8
|
20
|
26
|
29
| |
10
|
25
|
33
|
36
| |
12
|
30
|
39
|
43
| |
14
|
35
|
46
|
51
| |
16
|
40
|
52
|
58
| |
18
|
45
|
59
|
65
| |
20
|
50
|
65
|
72
| |
22
|
55
|
72
|
79
| |
24
|
59
|
76
|
87
|