Some east Saint John butane leak evacuees return home after EMO gives all-clear

Some east Saint John residents returned to their homes on Friday afternoonfor the first time since a rupturedIrving 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 toinstallan "enhanced [gas] leak detection and monitoring system" at itsSaint John East Terminal on Bayside Drive before the butane lineresumes operations.

And the Saint John Emergency Measures Organization haspledgedto improve its communications planafter facing criticismabout 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 detected

The 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, toldCBCNews earlier this week she noticed anodour for about three days priorto the leak being discovered.

The EMO started contacting evacuees from Spruce Avenue, First Street East and Second Street East at mid-afternoon Friday to notifythem it was safeto go home.

"Multiple air quality tests conducted overnight and throughout the day today have indicated that these areas are safe and clear, with 12 consecutive hours of a zero LEL[lower explosive limit] level recorded," the EMO said in an emailedstatement around 3:45 p.m.

LELis the minimum concentration of a particular gas or vapour that is capable of combustingin the presence of an ignition source, such as a spark, heat or flame.

The maximum concentration of a gas or vapour that will burn in the air is known as the upper explosive limit, UEL.

Concentrations below the LELare too lean to burn and concentrations above the UELare too rich to burn.

Remediationof the siteIrving'sSaint John East Terminal on Baysideis complete, the EMO said.

The broken pipelinehas been purged of residual vapoursand the liquid butane on the ground has been removed.

Some streets still closed

RiverAvenue and Pleasant City Street, which are closer to the broken pipeline, remain closed until air qualitytests over a12-hourperiod come back negative, said the EMO.

Power in those homes has been turned off since Monday.

Heather Follett, who lives on River Avenue, said she was told it could be Sunday or Monday before her family if allowed to go home.

They said butane was detected in a storm sewer close to CourtenayBay, but they're hoping the heavy rain anticipated Friday night will help wash it away, said Follett.

Bayside Drive, a major artery on the city's east side,also remainsclosed from theCourtenayBayCausewayto Red Head Road until further notice. Officials said they might reopen one lane in each direction before the road is fully reopened.

One of the first evacuees allowed to go back home, a woman on Second Street East, told CBCNews she was excited.

Her neighbour offered only a thumbs up.

Emergency responders are accompanying the residents into their homes to confirm the air quality and to ensure the properties sustained no damage, said the EMO.

40-year-old pipe

TheEUB,which regulates pipelines that carry hazardous materials in the province, has conducted a preliminary investigation of the leak, said spokesman David Young.

It suggests the approximately five-centimetre crack the pipeline sustained is related to the recent extreme cold weather, said Young.

Pipelines are designed to allow for unconstrained expansion and contraction with temperature changes. Butice buildup in one area appears to have constrained the pipe's movement,he said.

Thepipe was installed around 1977 but was re-ratedwithin "the last few years," as required, Irving Oil's vice-president and chief operating officer Mark Sherman told reporters during a media briefing Friday morning.

"So we're very confident with the inspections that have been done that the pipe in general has been, you know, it's certainly not a bad actor, it's been in good shape," he said.

"So that's why the investigation is very important to find out what happened."

The Department of Environment is alsoinvestigating.

Repairs will be inspected by EUB

TheEUBhas directed Irving Oilto "demonstrate that the pipeline can be operated safely" before permission will be granted to resume operation, said Young.

"This will include the installation of an enhanced leak detection and monitoring system," he said.

TheEUBhas directed Irving Oilto "demonstrate that the pipeline can be operated safely" before permission will be granted to resume operation, said Young.

"This will include the installation of an enhanced leak detection and monitoring system," he said.

Sherman said "it wouldn't be typical to have gas detection in the area."

"It's a long pipeline, it's quite an area to cover. It's certainly not part of the regulation."

TheEUBdoes require Irving employees to walk the line monthly, but the company does so on a weekly basis "as a minimum," Sherman said.

Given the proximity to the homes there, we're going to look at what we think is adequate to safeguard the public.- Mark Sherman, Irving Oil

Young said "the board's aware there was supposed to be a monitoring program" for the pipeline.

"But what that program is and what happened is part of the investigation."

There are complexlevels of requirements that depend on certain conditions, he explained.

For now,EUBofficials are focusing on whatIrving Oil must do before it can operate the pipeline again, said Young. They'll deal with whatever was in place before, afterward, he said.

Irving must also raise a section of the pipeline so it won't be susceptible to constraints due to icyconditions, he added.

The board's pipeline safety staff will oversee and inspect the repairs, which could be complete within "a few days," said Young.

"The investigation into the incident will continue to determine if any further changes to the company's licence to operate the pipeline are required," he said.

Once repairs are complete, Sherman said a temporary gas detection system will be installed.

A permanent detection system will have to be designed and ordered, he said.

"Any time you have an incident, there's lessons learned as points of reflection," Sherman said. "And given the proximity to the homes there, we're going to look at what we think is adequate to safeguard the public."

'We'll work to be better next time'

Kevin Clifford, the Saint John fire chief and director of EMO, acknowledged Friday that communication with the public about theleakfell short.

"We've got some resource challenges this week, but that should never be an excuse,"Clifford said during the media briefing only the second such public briefing held by EMO in the five days since the leak was detected.

News releases were issued once or twice a day at most.

"I do appreciate that the media needed better updates at times and we'll take some lessons from this, but at the same time I do appreciate your patience," he said.

"We'll work to be better next time."

Officials have been providing regular updates to the approximately 65 area residents who were forced from their homes Monday, media representatives have not been allowed to attend.

Clifford commended the evacuees for their resilience, patience and understanding.

"It's not lost on us that this has been a significantimpact for them," he said.

"We're moving to bring this thing to a conclusion."

Bracing for 'major deluge'

EMO crews are bracing for anotheremergency, given the "major deluge" in the forecast for Friday and Saturday.

Environment Canada has issued a freezing rain warning and a rainfall warning across New Brunswick.

• Freezing rain warnings expected to bring flooding, power outages

The Fundy Coastcould get more than 100 millimetres of rain. The rest of southern New Brunswick could see between50 mm and 80 mm. In the northern part of the province, rainfall amounts will be about 25 mm.

The north and northwestern parts of the province are also under a flash freeze warning.

A second EMO command post has been set up on Bayside Drive as crews deal with the aftermath of the leak and the weather.

J.D. Irving operations resume

Meanwhile, the Irving Paper mill, Irving Wallboard plant and J.D. Irving offices on Bayside Drive were expected to resume full operations Friday after overnight air quality tests in the buildings and water and sewer linesfound no traces of butane, spokeswoman Mary Keith said in an emailed statement.

The operations were evacuated and shut down Wednesdayaround 8:30 p.m. after traces of butane gas were detected in the air at Irving Paper.

The facility does not use butane, but officials found no evidence of a connection with the Irving Oil leak, said Clifford.

"Indeed it could have been unrelated," he said.

A millemployee, who was experiencing "headache symptoms" after her shift,went to the Saint John Regional Hospital at around 9:30 p.m., Keith confirmed.

The female employee underwent "tests" and was subsequently released,"said Keith, without elaborating.