77 Ill. Adm. Code 906.APPENDIX A

A Illustrations and Exhibits

Year: 2026Length: 1,572 wordsOfficial source
Section 906 Section 906.APPENDIX A   Illustrations and Exhibits Section 906.ILLUSTRATION A   Plan View of a Mound Utilizing Two Trenches as the Absorption Area Section 906.APPENDIX A   Illustrations and Exhibits Section 906.ILLUSTRATION B   Cross-Section of a Mound Using Trenches for the Absorption Area Section 906.APPENDIX A   Illustrations and Exhibits Section 906.ILLUSTRATION C   Plan View of a Mound Utilizing a Bed as the Absorption Area Section 906.APPENDIX A   Illustrations and Exhibits Section 906.ILLUSTRATION D   Cross-Section of a Mound Using a Bed for the Absorption Area Section 906.APPENDIX A   Illustrations and Exhibits Section 906.ILLUSTRATION E   Mound Distribution System Mound Distribution System (continued) Section 906.APPENDIX A   Illustrations and Exhibits Section 906.ILLUSTRATION F   Typical Pumping Chamber Section 906.APPENDIX A   Illustrations and Exhibits Section 906.ILLUSTRATION G   Tee-To-Tee Lateral/Manifold Construction Section 906.APPENDIX A   Illustrations and Exhibits Section 906.ILLUSTRATION H   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 A   Illustrations and Exhibits Section 906.ILLUSTRATION I   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 A   Illustrations and Exhibits Section 906.EXHIBIT A   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 A   Illustrations and Exhibits Section 906.EXHIBIT B   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 A   Illustrations and Exhibits Section 906.EXHIBIT C   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 A   Illustrations and Exhibits Section 906.EXHIBIT D   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 A   Illustrations and Exhibits Section 906.EXHIBIT E   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 *      Each system must be checked to determine if this quantity is at least 10 times the lateral void volume. Section 906.APPENDIX A   Illustrations and Exhibits Section 906.EXHIBIT F   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 A   Illustrations and Exhibits Section 906.EXHIBIT G   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 A   Illustrations and Exhibits Section 906.EXHIBIT H   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 A   Illustrations and Exhibits Section 906.EXHIBIT I  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