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Post Posted: Fri Dec 15, 2017 8:13 am    Post subject: Re: PFAS - The Facts

Sorry to hear that Rob.

There's a lot of conflicting info out there. On one hand there are very tight official tolerable intake and safety trigger limits, with the fish tested showing well over the limits, which clearly suggests "don't eat them".

But the Defence line is "there is no consistent evidence of harm to humans".

On the one hand they don't want to worry those exposed, or trigger compensation claims, on the other they must warn people to avoid exposure because animal studies have shown toxic effects.

The people who have been exposed are possibly ones who should avoid further exposure.

PFAS are slow to leave flesh, and some of those Katherine/Tindal fish such as barra will have spread through the Daly/Katherine. What's the ratio of contaminated to uncontaminated fish in the system? Have they tested any meteries? Fish up the Katherine tested would likely be small. Might be bioaccumulation in big barra, especially given that the mullet tested were highly contaminated.

When deciding whether to eat fish you have to decide first yes or no, if yes how much you are willing to eat, whether you have had previous exposure to PFAS, and even then it's all rubbery.

Research is continuing, hopefully there will be some reassuring answers.

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Post Posted: Fri Dec 22, 2017 1:13 pm    Post subject: Re: PFAS - The Facts

Story here says the fish are safe to eat ... http://www.news.com.au/national/breakin ... 22113615c5

If the fish are indeed safe, what is the point of having an official tolerable daily intake and trigger level?

And what are the warning signs around the Katherine River for? Will they be removed?

If you live in Katherine and already have high PFAS levels, I'm guessing you really wouldn't want to be eating any contaminated fish.

NSW Health says PFOS studies are ongoing.

Still, there is some reassurance in the story.

What I don't understand is how companies can release chemicals onto the market without proving they are harmless.

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Post Posted: Thu May 03, 2018 5:08 pm    Post subject: Re: PFAS - The Facts

Dunno if I missed media reports when they were released but there is a lot more PFAS data available in reports from Defence now ... on this summary, the table on Page 12 seems self-explanatory regarding eating the local fish ... http://www.defence.gov.au/Environment/P ... ry2018.pdf

What isn't mentioned (that I could see) is the mobility of these fish through the system. Haven't seen any data on testing of fish in the Daly itself. Is zero, or 1%, or 10% or 100% of Daly barra affected?

List of publications here ... http://www.defence.gov.au/environment/p ... ations.asp

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Post Posted: Sat May 26, 2018 11:09 pm    Post subject: Re: PFAS - The Facts

High levels of a related chemical found in Katherine people ... http://www.news.com.au/national/norther ... 6a1aa16552

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Post Posted: Thu Jun 14, 2018 5:40 pm    Post subject: Re: PFAS - The Facts

PFAS in NSW's Hawkesbury ... http://www.abc.net.au/news/2018-06-14/p ... ys/9870162

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