It’s hoped work which will end flaring at Mossmorran will be completed on Thursday.
Meanwhile, it’s been revealed more than 30 complaints about the latest bout of flaring at the Fife plant have been made to the Scottish Environment Protection Agency.
Flaring has been lighting up the night skies since Saturday when a pump at the Fife Ethylene Plant failed.
Just last month ExxonMobil Chemical and its neighbouring operator on site, Shell UK, were given final warnings by SEPA over an incident last June.
Two other incidents which led to flaring are still being investigated.
Mid Scotland and Fife Green MSP Mark Ruskell has now raised health issues with Public Health Minister Aileen Campbell.
“I was able to discuss face to face with Aileen Campbell and her team the stories of suffering faced by constituents over many decades around the Mossmorran plant,” he said.
“As a result, she will be urging Sepa to monitor not just air quality, but light, noise and vibration in residents homes in the area.
“This is a welcome first step, but we also need a health study that seeks to better understand the impact the plant is having on health.
“Sleep deprivation is a huge factor in triggering a wide range of other medical conditions — the focus so far has been on air quality but it’s the combination of pollutants that is destroying the quality of life of local people.
“In the meantime, the plant operators need to come clean on what the long term trend will be in terms of flaring incidents given the age of the plant.”
Meanwhile ExxonMobil said work on commissioning a pump to restore normal operations was proceeding well and the current outlook remained that work would be completed on Thursday.
The company’s FEP plant manager Sonia Bingham said: “My dedicated team at FEP continues to focus on returning this pump to service as quickly and diligently as possible.”
Apologising again to the plant’s neighbours, she added everything was being done to minimise the size of the flare and disturbance to the local community.