Troutman Pepper installed Susan Charles, a partner in the environmental and natural resources practice group, as office managing partner of the Chicago office on May 1.Charles counsels clients on all aspects of environmental law including regulatory compliance, risk assessment, enforcement defense, and environmental litigation. She routinely advises clients with respect to spill and release reporting, hazardous waste issues, permitting, and state cleanup programs.• The Collins Law Firm promoted John Risvold to partner …