Come January, Denver will implement the first stage of its pay-as-you-throw trash pickup program. The changes come with plenty of apprehension from residents who have seen the reliability of their service falter this year amid staffing shortages at the city’s solid waste management division. Denver Auditor Tim O’Brien and his staff are among those who aren’t confident the city can pull it all off. In November, the Denver Auditor’s Office released a bruising report on the city’s trash collections services as they stand now and the city’s preparedness to expand that work for the pay-as-you-throw program.