Wisconsin Attorney General J.B. Van Hollen said a Marshfield, Wis., operation involved with frac sand has been ordered to pay $80,000 for violating state air pollution control laws, according to WAOW TV.
Read MoreWisconsin Attorney General J.B. Van Hollen said a Marshfield, Wis., operation involved with frac sand has been ordered to pay $80,000 for violating state air pollution control laws, according to WAOW TV.
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