DALLAS, TX--(Marketwire - June 7, 2012) - Frontier Oilfield Services, Inc. (OTCQB: FOSI) (PINKSHEETS: FOSI) announced today that Lonestar Income and Growth, LLC -- an unrelated third party investor -- has completed the acquisition of Frontier Oilfield Services, Inc 2011 Series "A" 8% Preferred Stock. This completion will supply sufficient capital for Frontier Oilfield Services, Inc. to purchase a majority interest in Frontier Income and Growth, LLC and its wholly owned subsidiary, Trinity Disposal and Trucking, LLC, a saltwater transportation and disposal company in East Texas.