RADNOR, Pa.–(BUSINESS WIRE)–Preferred Proppants, LLC (“Preferred Sands” or “Preferred” or the “Company”) today announced that it has entered into a definitive agreement for the sale of its Blair, Wisconsin facility and its Canadian assets (collectively, the “Blair” transaction) to Source Energy Services Ltd. (“Source”) (TSX: SHLE) for USD $80 million in cash, subject to closing and post-closing adjustments, and entering into a production payment agreement in respect of certain exploration rig