Separate exhaust systems are needed for the acid and sanitation rooms. Fumes should never mix because of the potential to create chlorine gas. Both the acid and chlorine rooms should exhaust to outside of the building.
Air should always be removed from the low point in the acid and sanitization rooms. Acid and chlorine fumes are heavier than air so the chemicals should be lifted off the bottom of the spaces. It is up to the MEP consultant to provide proper ventilation for these spaces.
In locations where hazardous chemicals are to be stored (typically pool chemical storage areas and pool equipment rooms) each room requires mechanical ventilation at a minimum rate of 1 CFM per square foot of floor area over the storage area, as stated per IBC (international building code) and IFC (international fire code) or 10 air changes per hour, whichever is more restrictive. Confirm with local codes and regulations if more stringent standards are required. Fumes and vapors shall be vented with exhaust taken per IBC and IFC recommendations.
There needs to be an air Vapor Shield, a device which seals common fuming-vapor acid shipping containers while allowing the liquid to be removed via a common diaphragm or peristaltic pump through tubing. The Vapor-Shield will prevent an internal vacuum and collapse of a sealed container. It will also prevent the pump from developing a vacuum-lock while attempting to remove the liquid from the sealed container.
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