St. John, N.B. — An estimated 50 mt of potash spilled March 6 when 12 CN Railway cars went off the track in New Brunswick enroute to the export terminal near here. Four of the cars tipped, spilling the potash. The product was from Potash Corp. of Saskatchewan Inc.’s mine in the province. Vacuum trucks were quickly brought in, and no major disruptions were reported. The tracks were operational again the next day, according to local reports.