Fog Blog Saint John Log:

SOME EASTSIDE RESIDENTS IN SAINT JOHN ALLOWED TO GO HOME FOR 1ST TIME SINCE MONDAY'S LIQUID BUTANE LEAK!....Some east Saint John residents returned to their homes on Friday afternoon for the first time since a ruptured Irving Oil pipeline carrying liquid butane forced the evacuation of the area on Monday morning.The New Brunswick Energy and Utilities Board has ordered Irving Oil to install an "enhanced [gas] leak detection and monitoring system" at its Saint John East Terminal on Bayside Drive before the butane line resumes operations.And the Saint John Emergency Measures Organization has pledged to improve its communications plan after facing criticism about the way it handled providing information to the public on the hazardous materials incident.Butane is a colourless, highly flammable gas that can cause nausea, asphyxia and arrhythmia if inhaled.Butane leak leaves Saint John firefighters 'spread alarmingly thin'Irving Paper mill employee treated in hospital after butane detectedThe leak in the four-inch-diameter pipeline that runs to the Irving Oil refinery was discovered Monday around 10:30 a.m. when workers were making checks in preparation for doing maintenance work.It's still unclear when the above-ground pipeline broke, or how much butane escaped in liquid or vapour form.Evacuee Kelsey Fillmore, who lives on River Avenue, told CBC News earlier this week she noticed an odour for about three days prior to the leak being discovered.