77 Ill. Adm. Code 906.APPENDIX A
A Illustrations and Exhibits
Section 906
Section 906.APPENDIX AÂ Â Illustrations
and Exhibits
Section 906.ILLUSTRATION A Â Â Plan
View of a Mound Utilizing Two Trenches as the Absorption Area
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.ILLUSTRATION BÂ Â Cross-Section
of a Mound Using Trenches for the Absorption Area
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.ILLUSTRATION C Â Â Plan
View of a Mound Utilizing a Bed as the Absorption Area
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.ILLUSTRATION DÂ Â Cross-Section
of a Mound Using a Bed for the Absorption Area
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.ILLUSTRATION E Â Â Mound
Distribution System
Mound Distribution System
(continued)
Section 906.APPENDIX AÂ Â Illustrations
and Exhibits
Section 906.ILLUSTRATION FÂ Â Typical
Pumping Chamber
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.ILLUSTRATION GÂ Â Tee-To-Tee
Lateral/Manifold Construction
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.ILLUSTRATION H Â Â Dosing
Frequencies for Various Soil Textures
Soil Texture
Dosing Frequency
Sand
4 doses/day
Sandy loam
1 dose/day
Loam
Frequency not critical*
Silt loam; silty clay loam
1 dose/day*
Clay
Frequency not critical*
*Long-term resting provided by
alternating fields may be desirable.
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.ILLUSTRATION IÂ Â Maximum
Manifold Length (ft) for Various Manifold Diameters Given the Lateral Discharge
Rate and Lateral Spacing
Lateral
Discharge Rate
Manifold
Diameter – 1¼"
Manifold
Diameter – 1½ "
Manifold
Diameter – 2"
End
Manifold
Central
Manifold
Lateral
Spacing (ft)
Lateral
Spacing (ft)
Lateral
Spacing (ft)
2
4
6
8
10
2
4
6
8
10
2
4
6
8
10
10
5
4
8
6
11
10
10
5
6
8
10
12
16
24
24
30
20
10
4
4
6
4
4
6
8
10
4
8
12
16
20
30
15
2
2
4
6
6
8
6
8
10
40
20
4
4
6
8
10
50
25
2
4
6
8
60
30
2
4
70
35
2
4
80
40
2
90
45
2
100
50
2
Lateral
Discharge Rate
Manifold
Diameter – 3"
Manifold
Diameter – 4 "
Manifold
Diameter – 6"
End
Manifold
Central
Manifold
Lateral
Spacing (ft)
Lateral
Spacing (ft)
Lateral
Spacing (ft)
2
4
6
8
10
2
4
6
8
10
2
4
6
8
10
10
5
24
40
48
56
70
42
64
84
96
110
84
136
174
206
240
20
10
16
24
30
32
40
26
40
54
64
70
54
84
108
128
150
30
15
12
16
24
24
30
20
28
36
48
50
42
64
84
96
110
40
20
10
12
18
16
20
16
24
30
32
40
34
52
66
80
90
50
25
8
12
12
16
20
14
20
24
32
40
30
44
60
72
80
60
30
6
8
12
16
20
12
16
24
24
30
26
40
48
64
70
70
35
6
8
12
8
10
10
16
18
24
30
24
36
48
56
60
80
40
6
8
6
8
10
10
12
18
16
20
22
32
42
48
60
90
45
4
8
6
8
10
8
12
18
16
20
20
28
42
48
50
100
50
4
4
6
8
10
8
12
12
16
20
18
28
36
40
50
110
55
4
4
6
8
10
8
12
12
16
20
16
24
36
40
40
120
60
4
4
6
8
10
6
8
12
16
10
16
24
30
32
40
130
65
4
4
6
8
10
6
8
12
16
10
14
24
30
32
40
140
70
2
4
6
8
6
8
12
8
10
14
20
24
32
40
150
75
2
4
6
6
8
12
8
10
14
20
24
32
30
160
80
2
4
6
6
8
6
8
10
12
20
24
32
30
170
85
2
4
6
4
8
6
8
10
12
20
24
24
30
180
90
2
4
4
8
6
8
10
12
16
24
24
30
190
95
2
4
4
8
6
8
10
12
16
18
24
30
200
100
2
4
4
4
6
8
10
10
16
18
24
30
Section 906.APPENDIX AÂ Â Illustrations
and Exhibits
Section 906.EXHIBIT A Â Â Soil
and Site Factors that Restrict Mound Systems
Soil
Group
Slowly
Permeable Soils
Permeable Soils With Pervious Bedrock
Permeable Soils With High Water Tables
Percolation rate
a
180-360
min.
18-180
min.
18-180
min.
Depth to pervious rock
24
in.
24
in.
24
in.
Depth of high water tables
24
in.
24
in.
24
in.
Minimum depth to impermeable
soil layer or rock strata
60
in.
60
in.
60
in.
Depth to 50% by volume rock
fragments
24
in.
24
in.
24
in.
Slope
6%
12b
12%
b
a
Percolation test depth at 24 in., 12 in., and 24 in.,
for slowly permeable, shallow soils and high water table soils, respectively,
unless there is a more restrictive horizon above. If perched water is at 24
in., test depth should be held to 16 in.
b
For percolation rate of 18-90 minutes max. slope is 12%
and for 18-360 minutes, max. slope is 6%.
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.EXHIBIT B Â Â Fine Aggregate Gradations
Sieve
Size
Percent
Passing
Grad.
No.
No.
No.
No.
No.
No.
No.
No.
No.
No.
3/8
4
8
10
16
40
50
80
100
200
FA 1
100
97±3
65±20
16±13
5±5
FA 2
100
97±3
65±20
20±10
5±5
FA 3
100
97±3
80±15
50±20
25±15
3±3
FA 4
100
5±5
FA 5
100
92±8
20±20
15±15
FA 6
92±8
20±20
5±5
FA 7
100
97±3
75±15
35±10
3±3
FA 8
100
60±20
3±3
2±2
FA 9
100
20±15
5±5
FA 10
100
90±10
60±30
7±7
Horizontal Grade No. indicates
the sieve sizes used to test the material sample. FA numbers indicate the
Illinois Department of Transportation fine aggregate sizes.
Numbers throughout the table
such as 97 ± 3 mean that 97% of the sample, plus or minus 3% of the sample
passed through the screen.
Section 906.APPENDIX AÂ Â Illustrations
and Exhibits
Section 906.EXHIBIT CÂ Â Downslope
and Upslope Width Corrections for Mounds on Sloping Sites
Slope
%
Downslope
(I) Correction Factor
Upslope
(J) Correction Factor
0
1.00
1.00
2
1.06
.94
4
1.14
.89
6
1.22
.86
8
1.32
.80
10
1.44
.77
12
1.57
.73
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.EXHIBIT D Â Â Allowable
Lateral Lengths (Feet) for Three Pipe Diameters, Three Perforation Sizes, and
Two Perforations Spacings 906.60 if system is to treat flow from more than 4
bedrooms)
Perforation
Spacing (in)
Perforation
Diameter (in)
(1
in)
(1¼
in)
(1½
in)
30
3
/
16
34
52
70
7
/
32
30
45
57
1
/
4
25
38
50
36
3
/
16
36
60
75
7
/
32
33
51
63
1
/
4
27
42
54
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.EXHIBIT E Â Â Dosing
Quantity for Various Sized Homes
Home
Size
No.
Bedrooms
Gallons
Day
Dosing
Quantity*
Gal/Dose
1
200
50
2
400
100
3
600
150
4
800
200
*Â Â Â Â Â Each system must be checked to determine if this quantity is at
least 10 times the lateral void volume.
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.EXHIBIT F Â Â Void
Volume for Various Diameter Pipes
Diameter
inch
Volume
gal/ft/length
1
.041
1¼
.064
1½
.092
2
.164
3
.368
4
.655
6
1.470
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.EXHIBIT GÂ Â Pumping
Chamber Sizes for Various Sized Homes
Home
Size
No.
Bedrooms
Minimum Pumping Chamber Size
Gallons
1
250-500
2
250-500
3
500-750
4
500-750
Section 906.APPENDIX AÂ Â Illustrations
and Exhibits
Section 906.EXHIBIT H Â Â Perforation
Discharge Rates in Gallons per Minute Versus Perforation Diameter and In-Line
Pressure
In-Line
Pressure
(ft)
Perforation
Diameter (in)
1
/
4
5
/
16
3
/
8
7
/
16
1
/
2
9
/
16
5
/
8
1.0
0.74
1.15
1.66
2.26
2.95
3.73
4.60
1.5
0.90
1.41
2.03
2.76
3.61
4.57
5.64
2.0
1.17
1.82
2.62
3.57
4.66
5.90
7.28
3.0
1.28
1.99
2.87
3.91
5.10
6.46
7.97
3.5
1.38
2.15
3.10
4.22
5.51
6.98
8.61
4.0
1.47
2.30
3.31
4.51
5.89
7.46
9.21
4.5
1.56
2.44
3.52
4.79
6.25
7.91
9.77
5.0
1.65
2.57
3.71
5.04
6.59
8.34
10.29
Section 906.APPENDIX AÂ Â
Illustrations and Exhibits
Section 906.EXHIBIT IÂ
Friction Loss in Schedule 40 Plastic Pipe
FRICTION
LOSS IN SCHEDULE 40 PLASTIC PIPE, C = 150
(ft/100
ft)
Pipe
Diameter (in.)
Flow
1
1¼
1½
2
3
4
6
8
10
gpm
1
0.07
2
0.28
0.07
3
0.60
0.16
0.07
4
1.01
0.25
0.12
5
1.52
0.39
0.18
6
2.14
0.55
0.25
0.07
7
2.89
0.76
0.36
0.10
8
3.63
0.97
0.46
0.14
9
4.57
1.21
0.58
0.17
10
5.50
1.46
0.70
0.21
11
1.77
0.84
0.25
12
2.09
1.01
0.30
13
2.42
1.17
0.35
14
2.74
1.33
0.39
15
3.06
1.45
0.44
0.07
16
3.49
1.65
0.50
0.08
17
3.93
1.86
0.56
0.09
18
4.37
2.07
0.62
0.10
19
4.81
2.28
0.68
0.11
20
5.23
2.46
0.74
0.12
25
3.75
1.10
0.16
30
5.22
1.54
0.23
35
2.05
0.30
0.07
40
2.62
0.39
0.09
45
3.27
0.48
0.12
50
3.98
0.58
0.16
60
0.81
0.21
70
1.08
0.28
80
1.38
0.37
90
1.73
0.46
100
2.09
0.55
0.07
150
1.17
0.16
200
0.28
0.07
250
0.41
0.11
300
0.58
0.16
350
0.78
0.20
0.07
400
0.99
0.26
0.09
450
1.22
0.32
0.11
500
0.38
0.14
600
0.54
0.18
700
0.72
0.24
800
0.32
900
0.38
1000
0.46