Some leaks

Regarding a 1,500-barrel spill in the N.W.T.last year, "Enbridge originally said when the spill was discovered that only four barrels of [oil] leaked from the pipeline" ("Keystone denial threatens Gateway: Enbridge," The Edmonton Journal, January 20).  Later the company said the spill "involved anywhere from 700 to 1,500 barrels." Now they say it's at the "uper limit of 1,500 barrels."

Says Enbridge spokeswoman Jennifer Varey, "some leaks aren't so easy to detect."

Nor is the severity.