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NAGs SP Mk2, page-142

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AntN

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20/11/17

09:29

Post #: 28939541
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Originally posted by ainsleym ↑

Does anyone have a heads-up on the tendering status for the tunnels. I expected tenders to be invited around about now, but I might be way off the mark.

I also found it interesting reading the posts regarding quantities of lime to treat PASS. Initially I thought the 100kgs/tonne seemed an overkill to get the pH up to neutral levels, but I suppose thats not the main issue, the issue possibly is that due the sulphides present then acid is constantly, or at least for a very long time, being generated when in contact with moisture. So maybe the figure is not overkill, in which case the treatment charge is fairly significant. One would hope that if the PASS does end up going to a site where lime treatment is required, that the EPA will be enforcing ( and monitoring) the lime addition rate for permanent PASS disposal, rather than just sprinkling enough around to get the pH initially to the correct level as opposed to a permanent treatment. Frankly, I have no faith in government departments following up things on a routine, consistent basis despite their best intentions.

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There is no 'one' amount to treat PASS. The soil has to be tested to determine the 'net acidity' from which the 'liming rate' can be determined. Cost of oil testing is another thing NAG don't have to worry about....

NAG Price at posting: 6.0¢ Sentiment: Buy Disclosure: Held
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