The longtime leader of Lawrence’s city-run trash service has retired just two weeks before city commissioners are scheduled to receive a performance audit of his department.

City Manager David Corliss confirmed that Bob Yoos retired last week from his job as solid waste superintendent, but Corliss said the retirement was not related to any findings in a forthcoming performance audit of the city’s solid waste division.

“It was all very amicable,” Corliss said. “I did not want to lose him.”

Attempts to reach Yoos for comment were not successful.

Commissioners are scheduled to receive the solid waste audit at their meeting on Feb. 2. Corliss said the audit does contain suggestions for how the solid waste division could improve its operations and oversight.

In particular, the audit is expected to call for more oversight of an incentive program that allows members of the city’s trash crews to leave work prior to putting in eight hours as long as they have completed their assigned routes for the day.

“The auditor looked back at that information and found many are not working eight hours,” Corliss said. “We know that, but we need to more fully account for that time. We need to better keep track of what the gap is between the eight hours and their actual time.”

City Auditor Michael Eglinski declined to release the full audit Wednesday because he said he is waiting to receive a written response to the findings from Corliss — a standard procedure for city audits — before finalizing the document. Eglinski said the audit could be released by the end of this week in order to give the public time to review the document before it is presented to commissioners in February.

In addition to the worker pay issue, the audit is expected to review whether the city is accurately calculating its citywide recycling rate, and examine why the sanitation division has been operating at a deficit since 2005.