Stormwater September 2013 : Page 44

Compliance Tools on Wheels Stormwater managers have many options to choose from in street sweeping and catch basin cleaning equipment. BY DON TALEND T wo common best manage-ment practices (BMPs) that municipalities can use to manage nonpoint-source pollutants under a National Pollutant Discharge Elimi-nation System (NDPES) stormwater permit are street sweeping and catch basin cleaning. Stormwater manag-ers have plenty of equipment options available for these tasks. Street sweeping equipment, in par-ticular, has seen an evolution in recent years. Johnston North America points out that street sweeping is a non-structural source control. These types of controls prevent pollutants from entering stormwater fl ows through the expansion of cleanup programs, such as street sweeping, sidewalk sweeping, cleaning of storm drains, and enforce-ment actions against illicit dischargers. EPA and the states have recently focused on small debris particles (PM 10 , or particles with a diameter of 10 microns or less) because heavy metals and other pollutants have been shown to attach to them. These par-ticles become total suspended solids during rainfall and fugitive dust that gets blown around in dry weather. As a result of this emphasis, manufactur-ers are attempting to facilitate the effective removal of these fi nes. Recent efforts to better deal with the tricky challenge of keeping the fi nest dust out of stormwater have resulted in more than one type of street sweeper. Stormwater managers can choose from among mechanical broom sweepers, vacuum sweepers, regenerative air sweepers, and new dry sweepers. Federal Signal Vactor 2100 44 September 2013

Compliance Tools on Wheels

Don Talend

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