Ald. Scott Waguespack (32) used a committee meeting Thursday to ask whether Chicago Board of Ethics members think the city should be involved in the Chicago Park District’s probe into sexual abuse among its lifeguards. Aldermen advanced an update to the city’s excavation rules. A group of aldermen sent a letter to city health officials asking them to impose a requirement for proof of vaccination in indoor spaces. And the City Council Committee on Contract Oversight and Equity is set to advance an extension of the city’s minority hiring program, weeks before the program is set to expire.