The Occupational Health Office of University of California Systemwide has a new MSDS Resources web site. You should be able to find what you're looking for there. Biological Safety Cabinet A biological safety cabinet is designed to facilitate good sterile technique and to provide a protective barrier for personnel safety. Improper use of this valuable piece of equipment can compromise personnel safety and contaminate cultures. DON'T store equipment or supplies inside the cabinet.
Unnecessary objects can disrupt the airflow in the cabinet.
DON'T use the top of the cabinet for storage. The HEPA filter could be damaged and the balance of airflow could be disrupted. DON'T leave the view screen open when the cabinet is not in use. Keeping the screen closed between uses will help keep any contaminants in the room from getting inside the cabinet. DON'T eat, drink, chew gum, store food, or smoke near the cabinet.