Changes

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|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 ||  ||  || Max. load of 10:1 for infiltration systems (not specific to LID type) ||  ||

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| (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 ||  || CDA: max. 15000 ft2|

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|  Natural Slope (%) ||  ||  ||  ||  ||  || < 15 ||  || < 15 ||  ||  ||  ||  ||  

|colspan="2"|  Natural Slope (%) || < 15 ||  || < 15 ||  ||  ||  ||  ||  

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| A capped vertical sandpipe, perfored instaled to ||  ||  ||  ||  || || 100-150 mm ||  || 100-150 mm ||  ||  ||  ||  ||  

| 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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| the bottom of the facility to monitor drainage time ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  

| colspan="2"|Filter Mdia

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| 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

|   |    ||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 ||  ||  ||  ||  ||  

|  || Void space(%) || 30-40 || 30-40 || 30-40 ||  ||  ||  ||  ||  

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|  || Granular material (clear stone)(mm) ||  ||  ||  ||  || 50 || 50 || 50 ||  ||  ||  ||  ||  

|  || Granular material (clear stone)(mm) || 50 || 50 || 50 ||  ||  ||  ||  ||  

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|  || Geotextile, around the stone reservoir ||  ||  ||  || || min. 300 mm || 300 || min. 300 mm ||  ||  ||  ||  ||  

|  || Geotextile, around the stone reservoirwith an overlap at the top || min. 300 mm || 300 || min. 300 mm ||  ||  ||  ||  ||  

 

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| || with an overlap at the top || || ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  

| colspan="2"| Bottom widh of excavations (mm) || 600-2400 || 600-2400 || 600-2400 ||  ||  ||  ||  ||  

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| Bottom widh of excavations (mm) ||  ||  ||  ||  ||  || 600-2400 || 600-2400 || 600-2400 ||  || ||  ||  ||  

| colspan="2"|Minimum depth of excavations under concrete laneway (mm) ||  ||  ||  ||  ||  ||  || 3000 |

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| Minimum depth of excavations under concrete laneway (mm) ||  ||  ||  ||  ||  || || 3000 ||  ||  || ||  ||  ||  

| colspan="2"| length of time for draining after storm event (>25mm) ||  ||  ||  ||  ||  || max. 72 hr ||  || max.72 hr, 48 recommended |  

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| length of time for draining after storm event (>25mm) ||  ||  ||  ||  ||  || max. 72 hr ||  || max.72 hr, 48 recommended ||  ||  ||  || ||  

| colspan="2"| Depth to high water table (m) ||  ||  ||  ||  ||  || 1 ||  || 1 |  

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| Depth to high water table (m) ||  ||  ||  ||  ||  || 1 ||  || 1 ||  ||  ||  || ||  

| colspan="2"|Sand layer depth (mm) ||  ||  ||  ||  ||  ||  || 150-300 ||

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| Sand layer depth (mm) ||  ||  ||  ||  ||  || || 150-300 ||  ||  || ||  ||  ||  

|  colspan="2"|Subdrains ||  ||  ||  || Inlet pipes (mm) ||  ||  || 100-200 ||

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| Subdrains ||  ||  ||  || Inlet pipes (mm) ||  ||  || 100-200 ||  ||  ||  ||  || ||  

| colspan="2"|Overflow ( if infiltration rate ) ||  ||  ||  ||  ||  ||  || < 15 mm/hr ||

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| Overflow ( if infiltration rate ) ||  || ||  ||  ||  ||  || < 15 mm/hr ||  || ||  || ||  ||  

|  colspan="2"|Facilties reciving road runoff are not located within time of travel ||  ||  ||  ||  ||  || 2 ||  || 2 |

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| Facilties reciving road runoff are not located within time of travel ||  ||  ||  ||  ||  || 2 ||  || 2 ||  ||  ||  ||  ||

|  colspan="2"|wellhead protection areas, year ||  ||  ||  ||  ||  ||  || || |

| wellhead protection areas, year ||  ||  ||  ||  ||  ||  ||  ||  || ||  ||  ||  ||  

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