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Pollution prevention

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When assessing LID options on
your site, identifying pollution threats is an important part of
P2 is about anticipating and preventing pollution instead of
reacting to it after a spill or release has occurred. It is part of
an ongoing pollution management approach that is comprised
of prevention, control and clean-up.
changing raw materials or staff routines can result in pollution
The ways in which P2 is achieved varies from one sector to
another, but typically there are nine common opportunities:
===Dumpster management===
Dumpsters can be a major
source of pollution that can affect water quality. When
dumpster lids are left open , rainwater is able to mix withthe trash, resulting in a leaking fluid, or “dumpster juice”,that which can contain toxic organic and inorganic materials. If
not treated, this dumpster juice can enter the storm drain
system, contributing to poor water quality.
===Grease management===
Restaurants produce grease
and other wastes as a by-product of normal food
properly dispose of used waste.
===Parking lot maintenance===
Maintenance operations
have the potential to pollute stormwater runoff if sensible
P2 practices are not employed. This is particularly true
of power washing, which can deliver sediment, nutrients,
hydrocarbons, and other pollutants to into the storm drain
===Building maintenance===
Some building maintenance
practices produce polluted wash -water that can directly
enter the storm drain system during dry weather,
whereas others deposit fine particles or liquids that can
wash away into stormsewers during wet weather.
===Landscaping and grounds care == = Landscaping
services are generally performed by a lawn care/
landscaping contractor or an in-house maintenance
pollution, particularly in urban areas where soils are
===Outdoor storage===
The risk of stormwater pollution
is greatest for operations that store large quantities of
the storm drain system. Protecting outdoor storage areas
is a simple and effective P2 practice.
===Vehicle maintenance and repair == = Often, vehicles
that are wrecked or awaiting repair can be a concern if
leaking fluids are exposed to stormwater runoff. Vehiclemaintenance and repair can generate oil and grease,trace metals, hydrocarbons, and other toxic organiccompounds. When vehicles are washed on impervioussurfaces, dirty wash water can contaminate stormwaterwith sediments, phosphorus, metals, oil and grease, andother pollutants that can degrade water quality.8. Fuelling stations - Delivery of pollutants to the stormdrain can be sharply reduced by well designed fuellingareas and improved operational procedures. The risk ofspills depends on whether the fuelling area is coveredand has secondary containment.9. Snow and ice management - Ontario experiencessevere winter weather with large amounts of snowfall.Common snow removal practices include application ofde-icer. De-icer is usually made from a urea compoundor rock salt. Many property managers apply the productsindiscriminately, assuming that more is better. Howeverthese de-icers wash into local waterways when thesnow starts to melt. The key to de-icer usage is to applyit sparingly, and to remove most of the snow beforeapplication. ==P2 in practice==Here are three examples of how some P2 techniques havebeen applied:===Fuelling stations===If activities on your site include the loading and unloadingof product or supplies such as chemicals, fuels, or oils,you should have P2 techniques in place. Spill containmentmeasures will temporarily detain any spills allowing for thespill to be cleaned and disposed of properly This can reducethe risks of a spill draining into an LID feature, catch basin ordrainage swale. Valves can be incorporated into the designof the spill containment so that it can easily be drained ofrainwater or liquid.===Outdoor storage===Outdoor storage can create potential pollution threats asrainfall or runoff comes into contact with product, materialsor waste being stored outdoors. Further complications areadded when property facilities (i.e. waste bins, recycling bins)are susceptible to illegal dumping. To prevent and managepollution threats from outdoor storage, there are a variety ofP2 strategies that can be employed.Simple strategies can be employed such as storing de-icingsalt in a dedicated storage container to prevent continual lossof salt from precipitation. Other best practices include usinglarge storage containers to protect chemical storage drums.===Dumpster management===Maintenance of dumpsters is often overlooked and as a resultmany dumpsters are in poor condition. Cracks in dumpsterswill leak toxic organic and inorganic materials into catchbasinsand towards waterways. Opportunities for P2 include locatingdumpsters on a flat concrete surface that does not slopeor drain to the storm drain system, installing a secondary

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