Ive been a big advocate for crushed glass now for about 18 months, I think the green movement will make blasting with coal slag impossible in the very near future. The EPA is contemplating the idea of making coal ash and its byproducts (blasting media) hazardous material. A recent contaimination in Tennesse at a power plant has envolked this new proposed reguation. Our state (ND) is fighting these proposed regulations tooth and nail so its a guessing game at this point what will happen, it may just be a matter of time.
check out this article.
http://www.bismarcktribune.com/news...cle_03746b3a-f625-11de-b1d7-001cc4c002e0.html
check out this article.
http://www.bismarcktribune.com/news...cle_03746b3a-f625-11de-b1d7-001cc4c002e0.html