The scope and nature of work shall include, but is not limited to: the removal of sediment, leaves, and debris from catch basins, removal of debris and sediment from underground vaults and tanks, and vault filter cartridge and media replacement. Other maintenance services include: utility potholing, pipe jetting, root cutting, CCTV pipe inspection, emergency spill and stormwater response, and stormwater facility structural maintenance or construction services. There are currently 4,710 City-owned catch basins within the areas shown in Attachment 1 of Exhibit A. Other types and number of facilities relevant to this contract are: A. CDS Structures – 21 B. Control Structures – 13 C. Vaults – 17 D. Tanks – 17 E. Filtration Vaults – 30 F. Modular Wetlands – 5 G. Oil Water Separators – 162