An employee guide to janitorial maintenance services

At Fermilab, the organization responsible for keeping the lab clean and germ-free is Clorica Management, a janitorial maintenance service.

Clorica performs three kinds of services: routine, utility and reimbursable.

  • Routine service is prioritized and performed within a base number of contract hours for the entire laboratory, with additional hours provided for reimbursable services and utility work. Routine tasks include cleaning restrooms, kitchens, offices and other workspaces, and removing trash. The majority of this work is performed between 2:30 p.m. and 11:00 p.m.
  • Utility work, which is limited to one hour or less, includes spill cleanup and plumbing-related clogs.
  • Reimbursable service includes cleaning buildings or areas not included in routine service, tunnel cleaning, cleanroom cleaning, snow removal and carpet or washroom scrubs.
  • Unit priced or subcontracted window washing is also available.

Clorica Management performs monthly inspections of areas they have cleaned, with an independent inspector performing the inspection once every quarter. Inspection scores are directly tied to contract incentives.

Approximately 1,000 surveys are sent to Fermilab employees each year. Typically only 20 percent are completed and returned. Clorica follows up with anyone who provides a suggestion or complaint on its survey.

Hours of operation:


Monday, Tuesday, Thursday, Friday: 6 a.m.-2:30 p.m.

Wednesday: 7 a.m.-3:30 p.m.

Second shift
Monday-Friday – 2:30-11 p.m.

Office hours
Dyann Messino or Danny Urrea – 7:30 a.m.-3:30 p.m.
Mary Urrea– 2:30 p.m.-11 p.m.

Any questions or concerns about cleaning schedules should first be directed to your building manager. Building manager contact information can be found by using the building manager query. In the event your building manager is unavailable, please contact the Clorica manager, Dyann Messino, at x2798.

Any questions regarding insects or other pests should be directed to your building manager. Clorica is not responsible for pest control. Fermilab has a subcontracted pest control service, which is coordinated through Roads and Grounds at x3303.