Several residents in the Alkali Flat and Mansion Flats neighborhoods downtown are tired of being awakened at odd hours. They’re asking a local solid waste agency to tighten the rules for the operating hours of private garbage trucks. About 20 people in the neighborhood want private trash haulers to start work later in the morning. The Sacramento Regional Solid Waste Authority, which oversees private waste haulers in both the city and county, allows trucks to travel through neighborhoods starting at 6 a.m. Alkali Flat and Mansion Flats residents want to change the rules so that private waste trucks would not operate until “full daylight hours” or 7:30 a.m. "[Noise from the trucks] wakes