Water tank testing

[Griepp06]

Bought this 150 gallon water tank used and it was used to store filtered water in a business setting but unsure what they were making with that water. I have scrubbed and bleached and scrubbed some more. I just filtered 100 gallons and filled it to test for leaks with no issues. I want to leave it sitting for a week and then test the water. How can I test the water to make sure it is fully clean and no issues with this tank? Bring a sample to LFS or mail it for an ICP or what should I do? Just being extra careful.

 

[fishywishy]

I would fill it with RODI water and let it sit for a week. If there is no TDS detected after that time, I think it should be safe to use.

 

[FUNGI]

ICP (or even cheaper....just ask them what they used it for.....)