Several preppers make the claim that storing plastic containers with water on concrete floors is bad because chemicals from the floor can leak into the plastic and then end up in the water.
Here are some examples:
Prepper blog Gotta Wanna Needa Getta Prepared quotes Kenneth Moravec:
Concrete attracts fluids and ‘bleeds’. Anything that has been on or in that concrete will find its way into your plastic water barrel. This includes the lime in the concrete, any hazardous materials (i.e. gasoline, oils, kerosene, or anything a contractor used in construction), algae, etc. Usually, it is not enough to make the water toxic, but it will taint the water enough to make the taste unbearable. And no amount of pouring it from container to container will take that taste away.
If a water storage source is in ideal conditions (it started out clean and was stored in a dark, cool area, not directly on concrete or near harsh fumes and chemicals), it technically can store indefinitely.
Do not sit your blue [water] barrels on the concrete. Concrete will leach - I guess some kind of chemical possibly up into the plastic. They tell you to set these on wood.
Is there any science that supports this claim?