Changes

To minimize risk of groundwater or soil contamination, the following management approaches are recommended (Pitt et al., 1999; TRCA, 2009b):

To minimize risk of groundwater or soil contamination, the following management approaches are recommended (Pitt et al., 1999; TRCA, 2009b):

Stormwater infiltration practices should not receive runoff from the following areas:  

Stormwater infiltration practices should not receive runoff from the following areas:  

*Pollution hot spots (e.g. vehicle fuelling, servicing or demolition areas, outdoor storage or handling areas for hazardous materials, and some heavy industry sites); *Prioritize infiltration of runoff from source areas that are comparatively less contaminated such as roofs, low traffic roads and parking areas; and

*Pollution hot spots (e.g. vehicle fuelling, servicing or demolition areas, outdoor storage or handling areas for hazardous materials, and some heavy industry sites); *Prioritize infiltration of runoff from source areas that are comparatively less contaminated such as roofs, low traffic roads and parking areas; and

*Apply [[pretreatment]] practices before infiltration of road or parking area runoff.

*Apply [[pretreatment]] practices before infiltration of road or parking area runoff.

==Other freezing related concerns==

==Other freezing related concerns==