VENTILATION: Hydrogen Sulfide detectors should be installed in or near areas where Hydrogen Sulfide is being used or stored. If appropriate, install automatic monitoring equipment to detect the level of oxygen and the presence of potentially explosive air-gas mixtures. Because of the high hazard associated with Hydrogen Sulfide, stringent control measures such as a gas cabinet enclosure or isolation may be necessary. Provide natural or explosion-proof ventilation adequate to ensure Hydrogen Sulfide does not reach exposure limits listed in Section 2. (Composition / Information on Ingredients). Local exhaust ventilation is preferred, because it prevents gas dispersion into the work place by eliminating it at its source.