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City council approves purchase of new replacement for failing CO2 tank

By Sue Sitter - | Feb 13, 2021

Sue Sitter/PCT Engineer Jim Olson demonstrates the difference between two forms of CO2 tanks for water treatment plants using cups.

The Rugby City Council approved the purchase of a carbon dioxide tank to replace a failing tank system at the city water treatment plant in a special meeting the evening of Feb. 8 at city hall.

The council voted unanimously to purchase a tank composed of foam material encased in steel manufactured by Georgia firm TomCo for a base price of $97,802, which includes freight costs.

The council also voted to spend not more than $10,000 for installation and commissioning for the tank system when it arrives in Rugby.

Engineer Jim Olson with Grand Forks firm AE2S told the council he researched several estimates for two different CO2 tanks.

The system chosen from TomCo would be available within six weeks, which council members agreed would meet the city’s need for timely replacement of the present system, which is in disrepair and more than fifty years old.

“It’s the oldest tank in the state,” Olson told the council.

Two other proposals were for vacuum jacketed tanks, which Olson likened to popular jacketed drinking cups.

Estimates for the vacuum jacketed tanks, which Olson said represented the state of the art, were about $100,000 higher than those for the foam tanks.

Other tank estimates included lead times, or periods before the tanks were available, of up to 20 weeks.

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