Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


Council Fine Tunes Hydrocarbon Sensor Protecting Raetihi

Council Fine Tunes Hydrocarbon Sensor Protecting Raetihi


Ruapehu District Council (RDC) is continuing to test and adjust the hydrocarbon sensor on Raetihi’s water intake in preparation for returning the Makotuku River as the township’s water source.

A spill from the Turoa ski field on Mt Ruapehu in October last year leaked 19,000 litres of diesel into the Makotuku River forcing RDC to switch the water source for Raetihi township to the Makara Stream.

Ever since the end of the of the civil defence response phase to the diesel spill RDC has been working to return Raetihi’s water source to the Makotuku River.

RDC Environment Manager, Anne-Marie Westcott, said that the successful installation of a hydrocarbon sensor on the raw water line feeding the Raetihi water treatment plant is a critical factor in enabling council to return the water supply to the Makotuku.

“Council is taking an extremely cautious approach in returning to the Makotuku River as Raetihi’s water source,” she said.

“The installation of a hydrocarbon sensor on a town’s water supply like in Raetihi has never been done before in New Zealand.”

“We are not willing to switch back to the Makotuku until the new systems have been thoroughly tested and we are satisfied that they are robust enough to withstand a wide range of factors.”

“In the case of the hydrocarbon sensor this includes testing it across a range of weather conditions from the current hot and dry conditions to wet and wild all of which affect things such as the river flow, run-off and water turbidity.”

“During the last heavy rain fall the hydrocarbon sensor picked-up very low readings measured in micrograms per litre.”

“As streams have natural oil in them that is released from the decay of plant material samples will need to be taken to confirm if the hydrocarbons detected is from the diesel or naturally occurring oils.”

Ms Westcott noted that this was positive and demonstrated how sensitive the sensor was at recording oils at very low concentrations.

“It may be however that the sensor has been set at too lower level than is required to detect diesel so we will be looking into that.”

“The other adjustment we have made is the installation of a float designed to keep the sensor submerged at the right level as the river flow goes up and down,” she said.

“The intake is designed to ensure that any diesel trapped in sludge is released into the water and can float to the top to be picked-up by the sensor.”

“We appreciate that the Raetihi community would like to see a return to larger Makotuku River over the current temporary smaller Makara Stream as their water supply as soon as possible but we won’t be taking any chances with the health of the community.”

Ms Westcott added that council hoped to be able to advise a target date for the switch back to the Makotuku at the next Waimarino Waiouru Community Board meeting on Thursday 13th February.

ends

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell:
On The Team Behind Trump's Throne

Forget the Putin factor. Daily, the team of charlatans, bigots and stunningly ignorant crackpots that Trump is appointing to head key federal agencies is just as alarming. These are positions with vast power and budgetary discretion over policies that stand to affect tens of millions of vulnerable Americans. Sad! More>>

 

Gordon Campbell: On Bill English, Abroad

If David Cameron was the closest thing John Key had to a political mentor, their successors also share a whole lot in common. Theresa May and Bill English were both propelled into the top jobs as the result of unexpected resignations, and without much in the way of credible competition from their colleagues... More>>

ALSO:

Pike River: Labour Bill To Override Safety Act For Mine Entry

“Bill English has been hiding behind the legal excuse that any attempt to re-enter the mine to recover the bodies might place the mine’s owner, Solid Energy Limited, and its directors in breach of the Health and Safety at Work Act 2015." More>>

ALSO:

Gordon Campbell: On Populism And Labour 2017

For many people on the centre-left, populism is a dirty word, and a shorthand for the politics of bigotry. In this country, it has tended to be equated with the angry legions of New Zealand First. Who knew they were not just a reactionary spasm, but the wave of the future? More>>

Oxfam: 30% Of NZ Owns Less Wealth Than Our Two Richest Men

The research also reveals that the richest one per cent have 20 per cent of the wealth in New Zealand, while 90 per cent of the population owns less than half of the nation’s wealth. The research forms part of a global report released to coincide with this week’s annual meeting of political and business leaders at the World Economic Forum in Davos, Switzerland. More>>

ALSO:

Hospitals: Resident Doctors Set To Strike Again

Despite discussions between the DHBs and NZRDA over safer hours for resident doctors progressing during the last week, the strike planned for next week appears set to proceed. More>>

ALSO:

Not So Super Fund: More Burning Ethical Questions For Steven Joyce

Greens: Radio New Zealand reported this morning that the New Zealand Superfund has $77 million invested in 47 coal companies that the Norwegian Government’s Pension Fund – the largest sovereign fund in the world – has blacklisted. More>>

Activism: Greenpeace Intercepts World’s Biggest Seismic Oil Ship

Greenpeace crew have made contact with the world’s biggest seismic oil ship after travelling 50 nautical miles on two rigid-hulled inflatables off the coast of Wairarapa... Greenpeace radioed the master of the Amazon Warrior to deliver an open letter of protest signed by over 60,000 New Zealanders. More>>

ALSO:

Gordon Campbell: Why Tax Cuts In 2017 Would Be A (Proven) Bad Idea

Ever since the world fell prey to the mullahs of the free market in the 1980s, no amount of real world evidence has managed dispel one key tenet of their economic faith. Namely, the idea that if you cut income taxes and taxes on small business, a wave of individual enterprise and entrepreneurial energy will thus be unleashed, profits will rise and – hey bingo! – the tax cuts will soon be paying for themselves ... More>>

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
More RSS  RSS
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news