Corpus Christi Army Depot (CCAD) is looking to lease an oxygen tank with a capacity of up to 7200 gallons for a continued need for bulk liquid oxygen deliveries in support of metal spray processes. Re... Corpus Christi Army Depot (CCAD) is looking to lease an oxygen tank with a capacity of up to 7200 gallons for a continued need for bulk liquid oxygen deliveries in support of metal spray processes. Request for proposal is for a Base plus 2 year option periods.