Difference between revisions of "Talk:Soakaways, Infiltration Trenches and Infiltration Chambers Guide"
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|Setback from building Foundation(m) | |colspan="2" |Setback from building Foundation(m)|| 4 || || 4 || || || Max. load of 10:1 for infiltration systems (not specific to LID type) || || | ||
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| (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 || || CDA: max. 15000 ft2| | ||
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| Natural Slope (%) | |colspan="2"| Natural Slope (%) || < 15 || || < 15 || || || || || | ||
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| A capped vertical sandpipe, perfored instaled to | | colspan="2"|A capped vertical sandpipe, perfored instaled to the bottom of the facility to monitor drainage time || 100-150 mm || || 100-150 mm || || || || || | ||
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| | | 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 | ||
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| || Void space(%) | | || Void space(%) || 30-40 || 30-40 || 30-40 || || || || || | ||
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| || Granular material (clear stone)(mm) | | || Granular material (clear stone)(mm) || 50 || 50 || 50 || || || || || | ||
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| || Geotextile, around the stone | | || Geotextile, around the stone reservoirwith an overlap at the top || min. 300 mm || 300 || min. 300 mm || || || || || | ||
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| | | 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"| 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"|Sand layer depth (mm) || || || || || || || 150-300 || | ||
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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"|Facilties reciving road runoff are not located within time of travel || || || || || || 2 || || 2 | | |||
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| | | colspan="2"|wellhead protection areas, year || || || || || || || || | | ||
| wellhead protection areas, year || || || || || || | | |||
|} | |} |
Revision as of 14:24, 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 | Max. load of 10:1 for infiltration systems (not specific to LID type) | ||||||
(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 | ||||
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 |