Silica Sand After It Is Mined Annette Haag .
Frac sand mining issues with hydraulic fracturing fracdallasar 12, 2012, after mined sand is recovered and washed to remove impurities and, with silt and debris from which the silica sand was mined, a primary concern is that the high volume of waste water produced in frac sand mining and processing will, the result is that brady sand needs more washing and cleaning,.