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Re: 5 tons of dioxin???
Tony wrote:
>other loose ends: Alan, can you really mean 5 tons of pure dioxins in the
>incinerator brick refractory wall???????????
That is what it said in the local paper! But I hope that this was one of
the corrections that they made in later editions. It just can't be
correct as pure dioxin but there may be 5 tonnes of dioxin contaminated
dust.
For those that are interested in more detail the lab reports that I have
seen indicate that the levels on the site were:
Sample 1 'Red Ash' ('solid ash sample') 2500 ng/kg ITEQ 140000 ng/kg
Total
There are then three more samples of metals from the flue plates in the
stack:
North Flue Plate GL 544 pg/kg ITEQ 44000 pg/kg Total
South Flue Plate GL 270 pg/kg ITEQ 15000 pg/kg Total
Small Flue Plate 30M 2100 pg/kg ITEQ 110,000 pg/kg Total
ESP ash from old plant UK plant was reported in the range 6,600 ng/kg and
31,100 ng/kg
(See the Environment Agency report 'A review of dioxin releases to land
and water in the UK',1997).
This data pre-dates the current scare and so more samples may have been
taken. It does not seem very cautious to act on just one ash sample. It
strikes me that it would have been wise to have done this work properly
before blowing the stack up - that was probably the most effective way to
spread the fly ash around the local area. It will be interesting to see
if they do any local ground samples when the demolition work has been
completed.
Hope this is helpful
Best wishes
Alan
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