"john" wrote in message
...


Harold and Susan Vordos wrote:
"Too_Many_Tools" wrote in message
...
snip-----


Think about it...how do we know that the current sheetrock doesn't
have the same problem?


You don't. It's common practice to harvest gypsum from bag houses from
coal fired power plants, even here in the good ol' USA. It is used by
the drywall industry to make wallboard. There are other sources, much of
it occurring in nature.

One thing to consider---sulfuric acid does NOT dissolve copper. It is
commonly used as a pickle for copper, attacking *only* copper oxide.
There should be no free sulfur compounds present to create sulfuric
acid---it is bound with the limestone that is used to neutralize sulfur
dioxide, making gypsum in the process.

Harold

There is a sheetrock plant here in PA that has a long conveyer system ( I
think its over half mile) that goes right to the coal generation plant
that averages burning 100 coal cars a day. You always had a little acid
forming wnen sheetrock got wet.

John





Yes, and I hauled truckloads (many - @22 tons) of "fly ash" from one of
those plants in PA to numerous concrete plants for addition to the
transit-mix, cinder blocks, and paving. Especially to one site in Northern
Virginia where they were building an enormous concrete building -
apartments, offices, and the llike.

Who knows how benign that stuff is?

Flash