NV-OSHA (state plan) have cited an oil refining company for three serious violations stemming from a December explosion that left one employee seriously burned. The action proposes the refinery pay up to $20,790 in fines. Final determination is still in the administrative process. According to the state, refinery workers were attempting to restore flow to an asphalt recycle line that had become sluggish due to sub-zero temperatures. Several methods were employed to heat the line including application of plant steam inside the line. The use of a weed burner-style propane tank and torch for direct external heat, a method not prescribed in the company’s standard operating instructions, was also employed, according to the report. A blast and subsequent fire that rocked the refinery critically injured a worker, 24.