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Re: Lightweight backfill

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I believe there is a lightweight expanded shale backfill that is lightwieght
and has a good "angular" shape to it.  I beleive they "cook" the shale and
thereby some gases are created.  The final product "pops" into an irregular
shape.  

If you are interested, I can see if I can find the supplier.  One is on Ala
and the other is on LA I think.

Ron Martin