Unimin Corporation Announces Major Frac Sand Expansion

NEW CANAAN, Conn., April 29 /PRNewswire/ -- Unimin Corporation announced today
a major capital expansion at its Guion, Arkansas plant that will increase by
700% the plant's capacity to produce ISO/API 40/70 frac sand. The expansion
will add an additional 250,000 tons of 40/70 to the Company's existing 40/70
capacity in Arkansas and be completed by end of 2009.

The Company's action is in response increased demand for ISO/API 40/70 grades
in the Fayetteville, Haynesville and Barnett basins, where 40/70 is the
preferred proppant to efficiently extract gas from shale reservoirs. Guion is
ideally situated to serve these production fields via truck and Union Pacific
rail direct service. The plant, located in Izard County, AR, has 48
employees.

Headquartered in New Canaan, CT, Unimin is North America's largest supplier of
downhole fracturing and gravel packing sands. The Company's frac sand
expansion in Arkansas is the latest in a series of investments at its plants
in Illinois, Texas, Oklahoma, Wisconsin and Minnesota to help secure the
nation's energy independence.

SOURCE Unimin Corporation

Jeff Hunt, Corporate Customer Services, Unimin Corporation, +1-203-243-9004,
Fax, +1-203-243-9005, FracInquiries@unimin.com