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SNO Road and Street Maintenance <br />If investing in newer technologies, training for operators must be included in operation and <br />maintenance budgets. Costs for public education are small, and mostly deal with the need to <br />obey parking restrictions and litter control. Parking tickets are an effective reminder to obey <br />parking rules, as well as being a source of revenue. <br />Maintenance <br />i Not applicable <br />Supplemental Information <br />Further Detail of the BMP <br />Street sweeping <br />There are advantages and disadvantages to the two common types of sweepers. The best choice <br />depends on your specific conditions. Many communities find it useful to have a compliment of <br />both types in their fleet. <br />Mechanical Broom Sweepers -More effective at picking up large debris and cleaning wet streets. <br />Less costly to purchase and operate. Create more airborne dust. <br />Vacuum Sweepers -More effective at removing fine particles and associated heavy metals. <br />Ineffective at cleaning wet streets. Noisier than mechanical broom sweepers which may restrict <br />areas or times of operation. May require an advance vehicle to remove large debris. <br />Street Flushers - Not affected by biggest interference to cleaning, parked cars. May remove finer <br />sediments, moving them toward the gutter and stormwater inlets. For this reason, flushing fell <br />out of favor and is now used primarily after sweeping. Flushing maybe effective for combined <br />sewer systems, Presently street flushing is not allowed under most NPDES permits. <br />Cross -Media Transfer of Pollutants <br />The California Air Resources Board (ARB) has established state ambient air quality standards <br />including a standard for respirable particulate matter (less than or equal to to microns in <br />diameter, symbolized as PMio), In the effort to sweep up finer sediments to remove attached <br />heavy metals, municipalities should be aware that fine dust, that cannot be captured by the <br />sweeping equipment and becomes airborne, could lead to issues of worker and public safety. <br />Bridges <br />Bridges that carry vehicular traffic generate some of the more direct discharges of runoff to <br />surface waters. Bridge scupper drains cause a direct discharge of stormwater into receiving <br />waters and have been shown to carry relatively high concentrations of pollutants. Bridge <br />maintenance also generates wastes that maybe either directly deposited to the water below or <br />carried to the receiving water by stormwater. The following steps will help reduce the <br />stormwater impacts of bridge maintenance: <br />i Site new bridges so that significant adverse impacts to wetlands, sensitive areas, critical <br />habitat, and riparian vegetation are minimized. <br />8 of 9 California Stormwater BMP Handbook January 2003 <br />Municipal <br />www.cabmphandbooks.com <br />