smieglitz... It is not big problem to remove bichromate safely for me (read below). It is a problem for our government.

One more thing, Mustafa:
You don't have to have "clear" solution, there may be some crystals in water, even 3/4 of jar you have it in may be filled with crystals and you just refill it with water.
You don't have to keep it in absolute darkness - when it got light it breaks into neutral green pigment, some other salts and oxygen (pigment is quite common chrome oxide olive green, very small particles, nearly safe in contact with skin, can be used to make gums too when you seize paper), so exposing to light all washing water and taking out the pigment may be sufficient in most cases.

When healthcare comes to my mind, dichromate is big piece of shit.
It is almost unable to hold it soluted in water in plastic containers. Holding it in liquid solution is much safer than in dust or crystal form, but you have to care of it too. And use glass with rubber plug (made of gum).
I have 0,5 l bottle left after novocaine solution found in abandoned hospital - it is made of thick glass with crude scale, it has rubber plug *and* aluminium cap on it - it is quite good (If bottlenecks interior and plug is dried every time after opening it of course). Any drop or liquid left anywhere (bottleneck, tools etc.) will dry and form crystals and the fun begins again.
Medical thick glass bottles are more suitable in my opinion, than casual photo soup bottles.