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Petro-chemical based
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Floor strippers or re-conditioners
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It is also important that the recommended concentrations are used, as even an
appropriate agent in an inappropriate concentration can be potentially damaging.
Maintain the solution in good condition throughout the project, and avoid excessive
applications.
Quarterly Tasks
The quarterly statement of work involves a much more detailed and comprehensive
decontamination schedule and should only be conducted by experienced computer
room contamination-control professionals. Perform these actions three to four times
per year, based on the levels of activity and contamination present. Thoroughly
decontaminate all room surfaces including cupboards, ledges, racks, shelves and
support equipment. Treat or vacuum high ledges and light fixtures and generally
accessible areas as appropriate. Thoroughly treat vertical surfaces including windows,
glass partitions, doors, and so forth. Special dust cloths that are impregnated with a
particle absorbent material are to be used in the surface decontamination process. Do
not use generic dust rags or fabric cloths to perform these activities. Do not use any
chemicals, waxes or solvents during these activities.
Remove settled contamination from all exterior hardware surfaces including
horizontal and vertical surfaces. Treat the unit's air inlet and outlet grilles also. Do not
wipe the unit's control surfaces as these areas can be decontaminated by the use of
lightly compressed air. Special care should also be taken when cleaning keyboards and
life-safety controls. Use specially treated dust wipes to treat all hardware surfaces.
Treat monitors with optical cleansers and static-free cloths. Do not use Electro-Static
Discharge (ESD) dissipative chemicals on the computer hardware, since these agents
are caustic and harmful to most sensitive hardware. The computer hardware is
sufficiently designed to permit electrostatic dissipation thus no further treatments are
required. After all of the hardware and room surfaces have been thoroughly
decontaminated, the access floor must be HEPA vacuumed and damp mopped as
detailed in the Weekly Actions.
Biennial Tasks
Decontaminate the subfloor void every 18 months to 24 months based on the
conditions of the plenum surfaces and the degree of contaminant accumulation. Over
the course of the year, the subfloor void undergoes a considerable amount of activity
that creates new contamination accumulations. Although the weekly above floor
cleaning activities will greatly reduce the subfloor dust accumulations, a certain
amount of surface dirt will migrate into the subfloor void. It is important to maintain
the subfloor to a high degree of cleanliness since this area acts as the hardware's
supply air plenum. It is best to perform the subfloor decontamination treatment in a
short time frame to reduce cross contamination. The personnel performing this
operation must be fully trained to assess cable connectivity and priority. Inspect and
assess each exposed area of the subfloor void individually for possible cable handling
and movement. All twist-in and plug-in connections must be checked and fully
engaged before cable movement. All subfloor activities must be conducted with
proper consideration for air distribution and floor loading. In an effort to maintain
access floor integrity and proper psychrometric conditions, carefully manage the
number of floor tiles removed from the floor system. Each work crew should usually
have no more than 24 square feet (six tiles) of open access flooring at any one time. The
access floor's supporting grid system should also be thoroughly decontaminated, first
by vacuuming the loose debris and then by damp-sponging the accumulated residue.
Cleaning Procedures and Equipment
Controlling Contaminants F-9
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