Andy Breuer, a volunteer with Adapt CNY, helps in 2006 to clean up the Wilson Building.

Dozens of supporters helped out, weekend after weekend. “It was the kind of energy we wanted to tap into,” said Andy Breuer, a principal in Adapt CNY, a not-for-profit corporation that grew out of 40 Below. The early enthusiasm was followed by years of frustration: The economy tanked and little changed, although Breuer said officials at City Hall remained patient with the group.