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Maintaining water conductivity after DM storage tank

Sir, we produce DM water in DM plant with conductivity < 0.1 mcrosiemens/cm. and we require DM water with conductivity < 0.2 micro siemens/cm. but when we store this water in DM storage Tank( storage capacity 2000 M3), the conductivity increases to 0.3to 0.35 microsiemens/cm due to coming in contact with air(although it is a closed tank provided with breather) which is more than desired as we strictly require conductivity < 0.2 microsiemens/cm. can you please suggest some method so that conductivity is maintained < 0.2 microsiemens/cm after being stored in DM storage tank.

Amit Arora
power plant - Baroda, Gujarat, India
2005

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Amit,
It would be ideal to use DM water on line (with out storing.).If not practical then study the storage time that takes to increase the coductivity beyond usable level and use before that.
Regards

T.K. Mohan
plating process supplier - Mumbai, India
2005

I need to know if is it essential to store DM water in special rubber lined tanks.

Anil Vitankar
- Mumbai, Mahashtra, India
2007