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

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|colspan="2" |Setback from building Foundation(m)|| 4 ||  || 4 ||  ||  || Max. load of 10:1 for infiltration systems (not specific to LID type) ||  ||
|colspan="2" |Setback from building Foundation(m)
| 4 ||  || 4 ||  ||  || ||  ||
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|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 || || CDA: max. 15000 ft2|
|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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|colspan="2"|  Natural Slope (%) || < 15 ||  || < 15 ||  ||  ||  ||  ||  
|colspan="2"|  Natural Slope (%) || < 15 ||  || < 15 ||  ||  ||  ||  ||  
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| colspan="2"|Filter Mdia  
| colspan="2"|Filter Mdia  
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|   |    ||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
!colspan="1" style="background:white; color:black"|  
||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
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| || Void space(%) || 30-40 || 30-40 || 30-40 ||  ||  ||  ||  ||  
!colspan="1" style="background:white; color:black"|  
|| Void space(%) || 30-40 || 30-40 || 30-40 ||  ||  ||  ||  ||  
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| || Granular material (clear stone)(mm) || 50 || 50 || 50 ||  ||  ||  ||  ||  
!colspan="1" style="background:white; color:black"|  
|| Granular material (clear stone)(mm) || 50 || 50 || 50 ||  ||  ||  ||  ||  
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| || Geotextile, around the stone reservoirwith an overlap at the top || min. 300 mm || 300 || min. 300 mm ||  ||  ||  ||  ||  
!colspan="1" style="background:white; color:black"|  
|| Geotextile around the stone reservoirwith an overlap at the top   || min. 300 mm || 300 || min. 300 mm ||  ||  ||  ||  ||  


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Revision as of 15:36, 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)
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)
length of time for draining after storm event (>25mm) max. 72 hr
Depth to high water table (m) 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 2
wellhead protection areas, year