Difference between revisions of "Talk:Soakaways, Infiltration Trenches and Infiltration Chambers Guide"

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|colspan="2"|(Impervious drainage/treatment) area
 
|colspan="2"|(Impervious drainage/treatment) area
|5:1-20:1, 10:1 recommended || || 5:1-20:1, 10:1 recommended ||CDA < 5 acres||CDA < 2 acres (T), < 5 acres (B)||< 2 acres || Max. load of 10:1 for infiltration systems (not specific to LID type)|| CDA: max. 15000 ft2|
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|5:1-20:1, 10:1 recommended ||   || 5:1-20:1, 10:1 recommended ||CDA < 5 acres||CDA < 2 acres (T), < 5 acres (B)||< 2 acres || Max. load of 10:1 for infiltration systems (not specific to LID type)||CDA: max. 15000 ft2||
 
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|colspan="2"|  Natural Slope (%) || < 15 ||  || < 15 ||  ||  ||  ||  ||  
 
|colspan="2"|  Natural Slope (%) || < 15 ||  || < 15 ||  ||  ||  ||  ||  
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| colspan="2"| Bottom widh of excavations (mm) || 600-2400 || 600-2400 || 600-2400 ||  ||  ||  ||  ||  
 
| colspan="2"| Bottom widh of excavations (mm) || 600-2400 || 600-2400 || 600-2400 ||  ||  ||  ||  ||  
 
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| colspan="2"|Minimum depth of excavations under concrete laneway (mm) ||  ||  ||  ||  ||  ||  || 3000 |
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| colspan="2"|Minimum depth of excavations under concrete laneway (mm) ||  ||  3000||  ||  ||  ||  || ||
 
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| colspan="2"| length of time for draining after storm event (>25mm) ||  ||  ||  ||  ||  || max. 72 hr ||  || max.72 hr, 48 recommended |  
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| colspan="2"| length of time for draining after storm event (>25mm) || max. 72 hr ||  || max.72 hr, 48 recommended ||  ||    ||    ||    ||
 
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| colspan="2"| Depth to high water table (m) || ||  || || || || 1 || || 1 |  
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| colspan="2"| Depth to high water table (m) || 1 ||  || 1 ||   ||   || ||   ||   |    
 
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|  colspan="2"|Sand layer depth (mm) ||  ||  || ||  || ||  || 150-300 ||
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|  colspan="2"|Sand layer depth (mm) || |  ||150-300 ||  ||   ||  ||   ||  || |
 
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|  colspan="2"|Subdrains ||  ||  || || Inlet pipes (mm) ||  ||  || 100-200 ||
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|  colspan="2"|Subdrains Inlet pipes (mm) ||  || 100-200 ||  ||   ||   ||  ||  ||   |
 
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| colspan="2"|Overflow ( if infiltration rate ) ||  || ||  ||  || ||  || < 15 mm/hr ||
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| colspan="2"|Overflow ( if infiltration rate ) ||  || < 15 mm/hr ||  ||  ||   ||  ||   ||   |  
 
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|  colspan="2"|Facilties reciving road runoff are not located within time of travel ||  ||  ||  ||  ||  || 2 ||  || 2 |
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|  colspan="2"|Facilties reciving road runoff are not located within time of travel wellhead protection areas, year || 2 ||  || 2 ||  ||  ||  || || |
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|  colspan="2"|wellhead protection areas, year || ||  || ||  ||  ||  || || |
 
 
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Revision as of 16:25, 26 September 2017

LID Practice CANADA United States
Soakaways, Infiltration Trenches and Chambers CVC+TRCA (Factsheets-2010)[1] Toronto- 2016 LID-SWM Guide 2010[2] Massachusets SW BMP-2013 District of Columbia-SWM Guidebook-2010 W. Virginia-SWM design guidance manual-2012 Pennsylvania-City of Philadelphia green St. design manual-2014 Oregon SWM Manual-2014
Setback from building Foundation(m) 4 4
(Impervious drainage/treatment) area 5:1-20:1, 10:1 recommended 5:1-20:1, 10:1 recommended CDA < 5 acres CDA < 2 acres (T), < 5 acres (B) < 2 acres Max. load of 10:1 for infiltration systems (not specific to LID type) CDA: max. 15000 ft2
Natural Slope (%) < 15 < 15
A capped vertical sandpipe, perfored instaled to the bottom of the facility to monitor drainage time 100-150 mm 100-150 mm
Filter Mdia
Stone Resvoir 1.5" to 3" stone dia., 2" pea gravel above 6" sand below 1.5"-3.5" stone dia. For stone layer, 3" layer of washed river stone, or No. 8 or 89 stone above, 6-8 " of sand below Stone 1.5"-3.5" Drain rock 3/4"-2.5 " washed open graded aggregate
Void space(%) 30-40 30-40 30-40
Granular material (clear stone)(mm) 50 50 50
Geotextile around the stone reservoirwith an overlap at the top min. 300 mm 300 min. 300 mm
Bottom widh of excavations (mm) 600-2400 600-2400 600-2400
Minimum depth of excavations under concrete laneway (mm) 3000
length of time for draining after storm event (>25mm) max. 72 hr max.72 hr, 48 recommended
Depth to high water table (m) 1 1
Sand layer depth (mm) 150-300
Subdrains Inlet pipes (mm) 100-200
Overflow ( if infiltration rate ) < 15 mm/hr
Facilties reciving road runoff are not located within time of travel wellhead protection areas, year 2 2