A study conducted by South Dakota's Department of Environment and Natural Resources found that sand from the western part of the state cannot be used for hydraulic fracturing. After 16 months of studying various samples, the department found the sand did not meet the standards specified by the American Petroleum Institute. "While the study did not produce the desired results, DENR's geologists gained a better understanding of sand resources in western South Dakota, and that may prove useful in the future," said DENR Secretary Steve Pirner.

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