Adequate ventilation is a must, as it clears stale air and promotes alertness. Be observant for ceiling tiles having stained marks due to water leakage. These are to be replaced immediately due to the possibility of mold. Be observant of dirty tiles in the are of ceiling vents which could indicate that the air filters need to be cleaned.
In areas where hazardous substances may be used, especially in the workplace, an inquiry must be made to ascertain if there is a written hazard communication program dealing with Material Safety Data Sheets (MSDS), and labeling of container contents. MSDS sheets are to be made available for each hazardous substance used and must not be locked in a room or cabinet. The MSDS sheets must be made available to anyone working in the area.