The shale used for this run was part of a shipment of 148 bags averaging 110 lb. each, which was received from the Rifle Station in April 1952. It was blended from upper Bench and "EF" bed shale's in proportions of 75 percent upper bench and 25 percent "EF" bed. It has an average Fischer assay oil content of 28.9 gal. per ton.