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How To Produce And Mine Caco

Oct 15, 2008 Water quality from existing fills had pH from 3.5 to 4.5, and acidities up to 200 mg/L as CaCO 3. After covering the existing fills with alkaline sandstone, drainage water had a pH of 6.2 and contained net alkalinity. This has eliminated the need for chemical treatment of acid mine drainage from the pre-existing, pre-law valley fills.

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