Specifications include, but are not limited to: 1 Tank size 79482 gallons not to exceed 91404 gallons-1 time per yr. 2 Tank size 850 gallons not to exceed 978 gallons-2 time per yr. 3 Tank size 5890 gallons not to exceed 6774 gallons-2 time per yr. 4 Tank size 22000 gallons not to exceed 25300 gallons-2 time per yr.