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<DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>DelDOT is a co-permittee with New Castle County on a Phase I National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit. As part of the permit conditions, the Stormwater Pollution Prevention and Management Plan includes a street sweeping requirement to reduce pollutant loads from roadways to improve water quality. To meet permit requirements, DelDOT devised a targeted sweeping plan, which provides the most cost effective routes to reduce the greatest amount of pollutants. In general, interstates and expressways are swept 8 times per year, arterials are swept either 3 or 8 times per year depending on the average daily traffic, collectors are swept 3 times per year, and local roads swept 1 time per year within the permitted area. </SPAN></P><P><SPAN>Purpose: The Street Sweeping Plan helps DelDOT fulfill NPDES requirements. </SPAN></P><P><SPAN /></P><P><SPAN>The “Sweeping_Frequency” attribute denotes the number of times each year the roadway is swept.</SPAN></P><P><SPAN>Data is not updated on a regular basis. Updates are done when received from DelDOT</SPAN></P></DIV> |