Table 255-148F(4)(c), Water Quality Design Storm Distribution
| |||
---|---|---|---|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
0
|
0.000
|
65
|
0.891
|
5
|
0.008
|
70
|
0.991
|
10
|
0.016
|
75
|
1.0500
|
15
|
0.025
|
80
|
1.0840
|
20
|
0.050
|
85
|
1.1170
|
25
|
0.075
|
90
|
1.1500
|
30
|
0.100
|
95
|
1.1750
|
35
|
0.133
|
100
|
1.2000
|
40
|
0.166
|
105
|
1.2250
|
45
|
0.200
|
110
|
1.2334
|
50
|
0.258
|
115
|
1.2417
|
55
|
0.358
|
120
|
1.2500
|
60
|
0.625
|
Table 255-148F(4)(d), TSS Removal Rates for BMPs
| |
---|---|
Best Management Practice
|
TSS % Removal Rate
|
Bioretention systems
|
90%
|
Constructed stormwater wetland
|
90%
|
Extended detention basin
|
40% to 60%
|
Infiltration structure
|
80%
|
Manufactured treatment device
|
See Section 5.C[1]
|
Sand filter
|
80%
|
Vegetative filter strip
|
60% to 80%
|
Wet pond
|
50% to 90%
|
R = A+ B- (AXB)/100
|
Where:
| ||
R
|
=
|
Total TSS percent load removal from application of both BMPs
|
A
|
=
|
The TSS percent removal rate applicable to the first BMP
|
B
|
=
|
The TSS percent removal rate applicable to the second BMP
|