Which of the following is a requirement for a portable eyewash system?

A portable eyewash system is designed to provide immediate and effective decontamination in case of eye exposure to harmful substances. One of the key requirements for such systems is that they must deliver water at a minimum flow rate of 0.4 gallons per minute. This flow rate is essential because it helps ensure that enough water is available to adequately rinse the eyes and flush out contaminants, reducing the risk of severe injury.

While other factors, such as positioning in a well-lit area, contribute to the usability of the system, they do not have the same critical impact on the functionality and safety of an eyewash system as the required flow rate does. Being connected to a water hose is not necessary for a portable system, as these systems are designed to be self-contained and mobile. Additionally, portable eyewash stations can be used both indoors and outdoors, depending on the circumstances and hazards present. Thus, the specification of a minimum flow rate of 0.4 gallons per minute is a foundational requirement, as it directly relates to the effectiveness of the eyewash in emergency situations.