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DAQ Home > Public Interest> Tesoro Refining and Marketing

Tesoro Refining and Marketing:
Black Wax and Yellow Wax Processing Project


Tesoro Refining and Marketing Company (Tesoro) proposes to construct and operate a black and yellow wax crude processing project at its existing refinery in Salt Lake City, Salt Lake County, Utah.

The project involves the addition of expanded crude unloading, additional crude storage tanks, miscellaneous upgrades in pumps and heat exchangers to handle heavier crude feedstock, and several upgrades at the crude unit, fluid catalytic cracking unit (FCCU), vapor recovery unit (VRU) and distillate desulfurization unit (DDU).

The modifications requested by Tesoro will result in an increase of actual emissions due to the increased utilization of existing equipment and potential emissions from the proposed new equipment. Tesoro has not requested to increase their existing permit emission cap limits.

Approval Orders (AO)

The Division proposed Approval Orders (AO) for the Waxy Crude Processing Project and the Transport Loading Rack Project on February 21, 2012. DAQ held a public comment period for both actions from February 21, 2012 to June 7, 2012. The Division extended the comment period twice. The first extension provided the public with more time to review the ITA. The second extension provided the public with an additional 30 day comment period under new appeal rules. DAQ held a public hearing on April 17, 2012. The Division received public comments at the hearing and during the comment period. The Director considered these comments and responded to them in a Response to Comments Memorandum. DAQ issued the final AOs on September 13, 2012.

Intent to Approve (ITA)

DAQ analysis of the NOI determined that the waxy crude processing project was consistent with State air quality requirements. While the process will result in additional emissions increases, it will not result in a significant emissions increase or significant net emissions increase. The modification is considered minor under both PSD and nonattainment area NSR. While process changes from the project will result in actual emission increases, they remain below the existing permit emission caps. New and modified equipment will be included in the emissions caps for PM10, SO2, and NOx under the PM10 State Implementation Plan (SIP).

Tesoro is located in Salt Lake County, which is a nonattainment area for several criteria pollutants, including fine particulates (PM2.5). DAQ evaluated all emission sources at the refinery through a reasonably available control technology (RACT) evaluation as part of the PM2.5 State Implementation Plan (SIP).

Notice of Intent

Tesoro submitted a Notice of Intent (NOI) for the black wax portion of this project on September 21, 2011 and a revised NOI for the yellow wax portion of the project on December 21, 2011. The NOI included a project description, proposed modifications of refinery processes and equipment, and project emissions increases. The NOI also contained a Prevention of Significant Deterioration (PSD) applicability analysis to determine whether the project was a major modification subject to the New Source Review (NSR) permitting program. According to the PSD analysis, emission increases did not meet the threshold for significance and therefore did not trigger New Source Review requirements.

Public Participation

The Department of Environmental Quality has an open and transparent public participation process. Visit the DEQ Public Participation page for information about public meetings, how to participate and make public comments, and for GRAMA requests.