Cleaning frequencies are designed to provide an easy and clear standard for determining what services and frequencies are needed for your Data Centre. Frequencies are based upon guidelines recommended by ASHRAE in their publication Particulate and Gaseous Contamination in Datacom Environments. Datacom equipment center cleanliness can be maintained by establishing a consistent cleaning schedule. Cleaning frequency should be increased during construction or other contamination-producing activities. The essential areas to clean and time intervals are described below: Under Floor Minimum of once per year: Remove large debris that cannot be vacuumed by hand. Vacuum all accessible surfaces with a high efficiency particulate air (HEPA) filter vacuum. Anti-static wipe under floor structure. Floor Surfaces Minimum of once per week: HEPA vacuum floor surface. Do not dry mop or sweep the floor surface. This does not remove contaminants and can resuspend material. Scrub/buff floor surface as needed. Remove contamination beneath equipment racks and cabinets by brushing and HEPA vacuuming. NOTE: Most raised floor panels are covered with high-pressure laminate (HPL). This surface material is very durable but should not be abused. High-speed buffers should not be used. Low-speed scrubbers can be used. Water and non-corrosive cleaning solutions should be used sparingly and should be removed promptly from the surface. HPL flooring should never be waxed. Some, but not al HPL materials are conductive for electrostatic discharge (ESD) control. Coating this surface with standard floor finish may block the ESD path through the panel. Vinyl composition tile (VCT) floors should be periodically stripped and refinished with antistatic floor finish. Equipment and Rack/Cabinet Exteriors Minimum of once per quarter: HEPA vacuum and/or dam-wipe surfaces with an antistatic cleaner. Environment - Walls, Sills, Ledges, etc