Specifications include, but are not limited to: Supply and delivery of Liquid Oxygen with a minimum of 99.5 percent purity on an "as needed" basis as specified herein. The product will be delivered and supplied into the City's two 50,000 gallon cryogenic liquid oxygen storage tanks. This product will be used during scheduled maintenance of the City's cryogenic oxygen generation facility as well as for unscheduled emergency needs, should unscheduled shut-downs of the City's facility occur. Liquid oxygen is expected to be needed for an approximate five-day (5) period each year for maintenance shut-downs and/or other needs. Estimated quantities of liquid oxygen required for this event could be in excess of 145,000 hcf (hundred cubic feet) for the five-day process shutdown.