Airborne Contaminants; Gas Limit Recommendations - Oracle StorageTek SL3000 System Assurance Manual

Environmental Requirements
For sites in areas of seismic activity, the customer may want to permanently fix the
library position for added stability. The SL3000 library provides mounting holes in the
floor of each module where half-inch carriage bolts (mounting studs) can be used to
permanently fix the library's position.

Airborne Contaminants

Control over contaminant levels in a computer room is an extremely important
consideration when evaluating an environment. Automated tape library components
and electronics, tape drives, and media are subject to damage from airborne
particulates. The operating environment must adhere to the requirements of: ISO
14644-1 Class 8 environment. For more information, see
Contaminants".
Gasses that are particularly dangerous to electronic components include chlorine
compounds, ammonia and its derivatives, oxides of sulfur and petrol hydrocarbons. In
the absence of appropriate hardware exposure limits, health exposure limits must be
used.
Humidification with chlorinated water is a common source of damaging airborne
chlorine. Appropriately designed carbon filters must be used to ensure safe levels of
airborne chlorine when chlorinated water is used for humidification.
Table 7–7
Chemical Name
Acetic Acid
Ammonia
Chlorine
Hydrogen Chloride
Hydrogen Sulfide
Ozone
Petrol-hydrocarbons
Sulfur Dioxide
Sulfuric Acid
7-8 StorageTek SL3000 Systems Assurance Guide

Gas Limit Recommendations

Formula ASHRAE
CH COOH Not defined
3
NH
3500 µg/m
Cl
2100 µg/m
HCl Not defined
H S
50 µg/m
2
O
235 µg/m
3
C H Not defined
n n
SO
80 µg/m
2
H SO Not defined
2 4
Appendix B, "Controlling
OSHA (PEL) ACGIH
10 ppm Not defined
350 ppm 25 ppm
3
3 31 ppm (c) Not defined
5 ppm (c) Not defined
3 320 ppm (c) 10 ppm
3 30.1 ppm Not defined
500 ppm 75 ppm
3 35 ppm 2 ppm
1 ppm Not defined
NIOSH
Not defined
Not defined
0.5 ppm (c)
Not defined
10 ppm
Not defined
300 ppm
0.5 ppm (c)
1 ppm (c)