What Is It Made Of? Unlike other soil types for construction, structural fill is carefully selected and processed to ensure it meets stringent engineering standards. It is composed mostly of inorganic ...

Coal ash, what’s left over after coal is burned to generate electricity, is one of the largest waste streams in the U.S., with hundreds of millions of tons of it lying in hundreds of sites across the ...

You can read the full EPA draft risk assessment report that address more than just structural fill (82 pages) or excerpts that are specific to that use (10 pages). We’ve annotated the second document ...