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Talk:Soakaways, Infiltration Trenches and Infiltration Chambers Guide (view source)
Revision as of 16:25, 26 September 2017
, 7 years agono edit summary
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| colspan="2"|wellhead protection areas, year || || || || || || || || |
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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|
|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 |
| 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 |
| 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 |
| colspan="2"| Depth to high water table (m) || 1 || || 1 || || || || || |
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| colspan="2"|Sand layer depth (mm) || || || || || || || 150-300 ||
| colspan="2"|Sand layer depth (mm) || | ||150-300 || || || || || || |
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| colspan="2"|Subdrains || || || || Inlet pipes (mm) || || || 100-200 ||
| colspan="2"|Subdrains Inlet pipes (mm) || || 100-200 || || || || || || |
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| colspan="2"|Overflow ( if infiltration rate ) || || || || || || || < 15 mm/hr ||
| 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 |
| colspan="2"|Facilties reciving road runoff are not located within time of travel wellhead protection areas, year || 2 || || 2 || || || || || |
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