Leaking cistern

[Qweaver]

I had a new concrete cistern installed yesterday.  I filled it about 3/4 full and it is leaking badly.  The water level dropped about 2" overnight.  Two friends that have been in the water well and septic system business for over 30 years did the install.  They are out on another job and out of cell phone range so I can not ask them about this until this evening.  They did not mention leaking problems so I did not think about it.  They did not back fill around the tank because I needed to do the plumbing and I was going to backfill myself and we discovered the leaks this morning.  I did backfill about half of the hole but I can dig it backout fairly easily. Anyone else have this problem?  What are the options? 
Thanks for any suggestions.
Quinton

[Chuck White]

I can't recall the name of the product, but there is a company advertised on tv that claims they're 100% successful in repairing leaking basement walls & floors.
This might be a good avenue to explore.

[beenthere]

Quinton
Did they test it for leaks before putting it in?

What do they use for a cistern? I'm thinking maybe the same thing as the septic tank.

How large is it, and what does 2" of leakage calculate to in gallons?

I'm wondering if concrete will absorb that amount of water, and then slow down. ?? :

[SPIKER]

was there visible signs of leakage?   you said there is plumbing not hooked up, could there be some problems at some fittings?   there are some grout materials that can be used to repair old cisterns leaking, I would assume that it would work for NEW ones to, if you want that direction. 
good luck
mark

[Banjo picker]

New concrete tanks sometimes have small holes made in them at the bottom to keep them from filling up with water while they are in storage....when installed there is a small plastic plug that you are supposed to put in the hole to stop it up before you fill it....I installed one once that had not been pluged and it leaked badly....I had to get the plug and find the hole and plug it....Don't know if that is your case or not...but it might be worth checking out...Tim

[beenthere]

Seems there would be a drain in it anyway.
But the plug makes sense too.

[Qweaver]

Well, my friends came to check out the leaks and are convinced that they use a painted on sealing material that will take care of the problem.  So we are going to try that.  It's a fair amount of work to empty the tank and get down into the take to paint but we'd need to do the same thing with another new tank anyway. 
Quinton