Snow which is removed from streets or parking lots and deposited in temporary storage areas awaiting spring melt, contains sand, salt (chlorides ) and miscellaneous debris.
Because the majority of chlorides entering the surface waters of the province originate from melt water off roads through storm sewers systems, the most effective method to minimize chloride losses is to control the amount of salt applied. The controlled use of salted sand, appropriate application rates and application timing are methods by which the amount of chloride loss can be reduced, while still ensuring public road safety.
The primary concern associated with depositing snow relates to the sand, litter and foreign objects which are collected during snow removal. These materials become undesirable additions to the waters of the province during the spring melt period.