Environmental stewardship, health, safety and corporate citizenship are core values of HollyFrontier. We are committed to minimizing environmental impacts by reducing wastes, emissions and other releases. We conduct our business with primary emphasis on the health and safety of our employees, contractors and neighboring communities.

We have invested over $300 million since the merger in 2011 in safety and environmental improvements, approximately 25% of annual capital expenditure.   We have spent an additional $300 million on maintenance capital and risk reduction, improve both safety and reliability.

Health and Safety

We put health and safety first. We conduct our business with primary emphasis on the health and safety of our employees, contractors and neighboring communities. Below are some examples of our commitment to continuously improving the safety of our employees.

HollyFrontier continues to demonstrate industry leading performance in the reduction of API Tier 1 process safety events. This graph represents the number of events per 200,000 work hours.  

TRIR or Total Recordable Injury Rate is the number of injuries requiring treatment beyond first aid per 100 employees per year. HollyFrontier is committed to providing an injury-free workplace for its employees, contractors and guests. HollyFrontier has shown continuous improvement in employee injury statistics until 2014 and we believe that the emphasis we place on safety and the initiatives we drive will see this trend resume downward. 

  • Over 450 employees participated in Safety Leadership training led by executive management throughout 2014. The training emphasized an expectation that, as leaders, employees are expected to avoid unnecessary risk and work to create a culture of safe production.
  • Over 350 employees have attended training on structured incident investigation process aimed at better understanding the causes of incidents to enable implementation of improved preventative actions.
  • In 2013 our Tulsa Refinery was recognized for outstanding safety performance by the American Fuel and Petrochemical Manufacturers Association (“AFPM”), a trade association representing high-tech American manufacturers of virtually the entire U.S. supply of gasoline, diesel, jet fuel, other fuels and home heating oil, as well as petrochemicals.
  • In 2014, both the Tulsa Refinery and the Woods Cross Refinery received AFPM’s Meritorious Safety Performance Award. This award was given to refineries that achieved an employee total recordable incident rate of 0.6 or less at their sites during calendar year 2013 and did not have any process safety events that resulted in days away from work or restricted work, third party or employee fatalities, community evacuations, or community shelter-in-place.
  • In 2014, employees and contractors at our Woods Cross Refinery worked over a combined 1.3 million man hours without a lost time injury. Our Woods Cross Refinery has achieved three straight years with a recordable injury rate below 0.5, which is below the industry average of 0.89.
  • Our Tulsa Refinery has a three-year total recordable injury rate of 0.59, which is below the industry average of 0.89.
  • In 2014, the Cheyenne Refinery achieved its lowest total recordable injury rate since 2006, a result of HollyFrontier Corporation’s safety focus and initiatives.
  • In 2014, employees across all five refineries participated in “Managing Risk” training, which provided tools and insight into better hazard recognition and accident prevention.
  • HollyFrontier is an active participant in the AFPM Safety & Health Committee and the AFPM Hygiene Committee.
  • Over the last two years, our refineries have shown a 41% reduction in Tier 1 and Tier 2 Process Safety Events. The El Dorado and Woods Cross Refineries each had zero Tier 1 Process Safety Events in 2014.
  • Eighteen Special Occupational and Process Safety teams have been formed company-wide to focus on specialized topics such as Risk Reduction, Conduct of Operations, Mechanical Integrity and Equipment Reliability. These teams measure performance, identify gaps and drive continuous improvement initiatives across all refinery locations.
Our Safety

Emergency Preparedness

HollyFrontier has a very robust emergency preparedness program with the goal of protecting our personnel, the community, the environment and our assets.

  • Each refinery has a fully staffed emergency response team trained in firefighting, hazardous materials response, rescue and medical care.  
  • In 2014, HollyFrontier reached its goal of having every emergency response team member certified as a NFPA 1081 Advanced Exterior Firefighter.
  • HollyFrontier hosts an annual “Corporate Fire School” at the largest fire training facility in the world located at Texas A&M University. 

The Environment

A cornerstone of our effort to reduce waste, emissions and other releases is the effective management of the energy that we use to manufacture and deliver the fuels necessary to satisfy the needs of our customers. Below are some examples of the projects our subsidiaries have undertaken to improve energy efficiency.

Energy Efficiency
(thousand btu / barrel crude)


The graph represents the total energy consumption (i.e. fuel gas and natural gas consumption in heaters and boilers) on a per barrel basis.  Continued emphasis on energy efficiency has resulted in more energy efficient operations.  

Criteria Pollutant Emissions
(tons per million barrels crude)

The graph represents the sum of emissions of criteria pollutants (nitrous oxides, sulfur dioxide, carbon monoxide, particulate matter, and volatile organic compounds) on a per barrel basis. Emissions vary year to year depending upon many factors, including process unit shutdowns and throughputs.  

Greenhouse Gas Emissions
(per million barrels)

The graph represents the emissions of greenhouse gases, including carbon dioxide, nitrous dioxide, methane, on a per barrel basis.  Greenhouse gas calculations are generally driven by fuel gas combustion in process heaters and boilers.  

  • Our Woods Cross Refinery is currently being expanded from 31,000 barrels per day to 45,000 barrels per day, while technology is being installed to reduce total “criteria pollutant” emissions (which includes nitrogen oxides and sulfur oxides) across the entire refinery.
  • Our water conservation initiatives at the Navajo Refinery have reduced water usage to less than 45 gallons of water per barrel of crude refined - half the industry average.
  • We installed a flare gas recovery system at the Tulsa West Refinery, which recovers approximately 250,000 standard cubic feet of flare gas per day, reducing greenhouse gas and other pollutants.
  • MSAT2 Regulation – As an industry we have reduced the benzene content in conventional gasoline by almost 50% since 2010. HollyFrontier’s subsidiaries are investing in new Naptha Fractionation Units at the Cheyenne, El Dorado and Tulsa Refineries, which will further reduce benzene content in our gasoline.
  • Tier 3 Gasoline - As an industry, we have reduced the sulfur content in our gasoline by 90% over the past decade from 300 parts per million (ppm) to 30ppm. The Tier 3 standard reduces the annual average sulfur concentration in gasoline to 10ppm. We will invest in adding more hydrotreating capacity at several of our refineries in order to meet the new sulfur standard by 2017.

Greenhouse Gas

We have undertaken several projects to reduce greenhouse gas emissions. Below are some examples of the projects our subsidiaries have undertaken to reduce Greenhouse Gas emissions.

  • We assigned corporate level Energy Coordinators to provide oversight of refinery operations for energy conservation.
  • We partnered with third party fired heater experts to deliver ongoing training to refinery operators in the efficient operation of fired heaters and boilers and to identify and implement heater efficiency improvement projects.
  • We have either upgraded or are in the process of upgrading numerous fired heaters and boilers to state of the art design for increased efficiency. For example, a new crude unit heater at the Woods Cross Refinery was placed in service in the 2nd Quarter of 2015, resulting in an increased efficiency of 35% ( 0.42 MMBtu / hr per BBL of charge versus 0.64 MMBtu / hr with old design), reducing carbon dioxide emissions by 3.500 tons per year.
  • The El Dorado Coker Feed Heaters were replaced in December 2012, resulting in a 4.4% decrease in fired duty, plus an additional 9,000 pounds per hour of steam production. This represents a total carbon dioxide reduction of approximately 2,000 tons per year.