Final answer:
The term "immediate use" for emergency eyewash and shower requirements means that the facilities should be accessible within 10 seconds, free of any obstructions.
Step-by-step explanation:
For emergency eyewash and shower requirements, "immediate use" is typically interpreted as within 10 seconds or less, with no obstructions to interfere with accessibility. This standard is designed to ensure that in the event of a chemical exposure to the eyes or skin, individuals can quickly wash away the contaminant to minimize damage or injury. The specific time frame for accessing emergency eyewash and shower facilities can vary based on regulations set by organizations like the Occupational Safety and Health Administration (OSHA) or the American National Standards Institute (ANSI).