An Argentine-Uruguayan commission took 50 samples of effluent from the pulp mill off Fray Bentos and as many in the Gualeguaychú mouth of the river in Entre Rios. Botnia passes test. The reports from the samples collected on the Argetine side recorded more polluting than those found off Fray Bentos. The plant's formal name is Orion but is widely known for its original Finnish name Botnia.