Difference between revisions of "Talk:Soakaways, Infiltration Trenches and Infiltration Chambers Guide"
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Revision as of 20:05, 25 September 2017
Canada | US | ||||||||||||
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Soakaways, Infiltration Trenches and Chambers | CVC+TRCA | Toronto- 2016 | LID-SWM Guide 2010 | 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 | |||||
Factsheets-2010 | |||||||||||||
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 | CDA: max. 15000 ft2 | |||||||
Natural Slope (%) | < 15 | < 15 | |||||||||||
A capped vertical sandpipe, perfored instaled to | 100-150 mm | 100-150 mm | |||||||||||
the bottom of the facility to monitor drainage time | |||||||||||||
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 reservoir | min. 300 mm | 300 | min. 300 mm | ||||||||||
with an overlap at the top | |||||||||||||
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 | 2 | 2 | |||||||||||
wellhead protection areas, year |