Specifications include, but are not limited to: Furnish all necessary materials, equipment, labor, and incidentals as required to perform street sweeping services for the County of Imperial. The work involved shall include mechanical and/or manual sweeping of all curbed flow-lines, including all cross gutters, streets and paved center median islands. The areas to be swept consist of all streets and roads. Street sweeping shall consist of the removal by mechanical and vacuum street sweepers of all debris from all portions of the street, including, but not limited to both sides of residential streets, adjacent to residential raised medians, street intersections, the areas adjacent to arterial/collector street curbs and raised medians (such as left turn pockets) and the center striped area of arterial/collector streets. When necessary for proper street cleaning, more than one pass will be made on the street without additional charge; Additional sweeps requested by the County for unsatisfactory performance shall be responded to immediately; The County reserves the right to add additional streets and/or other right-of-way to the street sweeping schedule; and to request special sweeps other than regularly scheduled sweeping, when there are unusual conditions such as traffic hazards, parades and similar events. The vendor shall provide any additional sweeping services at the agreed upon curb mile cost; Sweeping in residential areas shall not commence prior to 7:00 a.m.; . Vendor shall maintain the sweeping schedule as approved by the County and shall maintain standby equipment to be used in the event of equipment breakdown or an emergency; Sweepers shall not be operated faster than 10 mph when sweeping paper, leaves or light trash; 5 mph when sweeping normal accumulation of dirt, sand and gravel; and 3 mph when sweeping heavy accumulation of dirt, sand and gravel.