Storage tank system having ease of placement and interconnectivity

A storage tank system in a containment area, comprising:

• a tank having a bottom, a front wall and a back wall spaced longitudinally apart by two sidewalls for defining an enclosed area for storing the liquid
• a skid extending along the tank for supporting the bottom of the tank and engaging a floor of the containment area;
• and
• rollers are located along a bottom edge of the skid adjacent a first end of the tank, being either the front wall or the back wall, for engaging the floor and supporting the weight of the first end of the tank in a manoeuvring position for manoeuvring within the containment area when a second end of the tank, being either the front wall or the back wall respectively, is lifted off the floor.