fbpx

Gore DC Monitoring Ammonia Gas Levels At Mill

Mar 05, 2020
707 Views

The Gore District Council is seeking more information about spikes last month in the level of ammonia gas emissions from the aluminium dross stored at the former Mataura paper mill.

The Council’s resource consent for the storage of the dross has a condition limiting the amount of ammonia gas discharged to the air to 5 parts per million. Since April 2018, the Council has engaged Land and Water Science to conduct continuous monitoring for ammonia gas, both indoors and outdoors, at the site.

On Saturday 8 February, just after midnight, the indoor sensors at the mill registered a level of 149.6ppm. The outdoor sensor maximum level during this time was 5.1ppm.
A second, albeit lower, spike occurred mid-afternoon on Sunday 16 February, when the indoor level registered 89.8ppm. The maximum outdoor level recorded on this day was 4.6ppm.

Gore District Council chief executive Stephen Parry said the spikes were concerning and the Council was investigating further.

Inalco, the company contracted to move the dross, has been notified, Mr Parry said.
Gore District Mayor Tracy Hicks said the incidents reaffirmed the need to get the dross out of its present location as quickly as possible.

“The dross should never have been stored at the mill in the first instance.
“We (the Council) have tried to do the best with the hand we were dealt after dross owner Taha Fertiliser Ltd went into liquidation, but the time has come to expedite its removal from Mataura.”

In its report, Land and Waters says increases in ammonia concentration greater than the threshold occupational exposure limit for ammonia toxicity to humans is often due to the strong relationship between air temperature and ammonia concentration.

“However, these ammonia concentration extremes do not appear to be temperature correlated. Extreme spikes such as these are possibly the result of disturbances caused by movement, agitation, or moisture affecting the product,” the report says.

It recommends any person entering the building should first check the monitoring sensors to ensure concentrations are less than 25ppm.

Mal’s Roadie – Heading West
News, Riverton
77 views
News, Riverton
77 views

Mal’s Roadie – Heading West

Malcolm Gayfer - Jan 16, 2021

Ever have those days when you've just got to get out and head to the wide open spaces? I had…

Name release: Pinders Pond Water Fatality, Central Otago
News
720 views
News
720 views

Name release: Pinders Pond Water Fatality, Central Otago

News Desk - Jan 16, 2021

Police can now release the name of the man who died while swimming at Pinders Pond on Saturday 15 January.…

Festival Tickets to go on Sale
Bluff, News
514 views
Bluff, News
514 views

Festival Tickets to go on Sale

Lindsay Beer - Jan 16, 2021

Tickets for this year’s Bluff Oyster & Food Festival on Saturday 22 May will go on sale at 9.00am on…

National Vintage Car Club Award Presented to Invercargill Hardware Store
News, Southland
510 views
News, Southland
510 views

National Vintage Car Club Award Presented to Invercargill Hardware Store

News Desk - Jan 16, 2021

Iconic Invercargill hardware store E Hayes and Sons are proud recipients of a Presidential Award presented by the Vintage Car…

Body Recovered, Central Otago
Central Otago, News
2907 views
Central Otago, News
2907 views

Body Recovered, Central Otago

News Desk - Jan 15, 2021

A body has been recovered from Pinders Pond in Central Otago this evening. Emergency services were notified of a person…