Public Notice for Sinclair Casper Refining Company Draft Permit

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Wyoming Department of Environmental Quality

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PUBLIC NOTICE 

FOR SINCLAIR CASPER REFINING COMPANY

DRAFT PERMIT

FOR

A HAZARDOUS WASTE MANAGEMENT FACILITY

 

The Wyoming Department of Environmental Quality (WDEQ) is giving notice and soliciting comments from the public regarding the Draft Permit for Sinclair Casper Refining Company.  The Sinclair Casper Refining Company is located east of Evansville, Wyoming at 5700 East Highway 20/26.  The comment period begins January 13, 2017 and ends February 27, 2017.

 

The Permit covers a hazardous waste treatment facility known at the Aggressive Biological Treatment Unit (ABTU), a hazardous waste storage unit known as the K051 Tank, two non-operating surface impoundments known as the API Separator Ponds (ASP) and Primary Effluent Pond (PEP), facility wide corrective action for all Waste Material Management Units (WMMU) and Areas of Concern (AOC), and requirements for operation, maintenance and monitoring of interim measures currently being implemented. 

 

The ABTU is a dual cell, double-lined surface impoundment that receives and treats refinery wastewater.  The refinery wastewater is classified as a hazardous waste due to concentrations of benzene.  The wastewater is treated by aeration to enhance biological destruction of organics, including benzene.  Once the wastewater is treated, it is discharged to evaporation ponds, known as the North Evaporation Ponds, located north of the North Platte River.  The Draft Permit covers design, operation, groundwater monitoring and closure requirements for the ABTU.

 

The K051 tank is a 40,000 gallon tank used to store API separator sludge (K051).  The tank is constructed of steel and has a concrete vault surrounding it to contain any potential leaks or spills.  K051 is periodically removed from the API Separator and placed in the K051 Tank.  When the tank reaches 85% of storage capacity, or the waste has been stored for five (5) years, the waste is removed from the tank and disposed off-site at a permitted facility.  The Draft Permit covers design, operation and closure requirements for the K051 Tank.

 

The ASP is a formerly used unlined surface impoundment located on the south side of the North Platte River, which received refinery wastewater until 1989.  The ASP was closed under interim status requirements in August 1989, which entailed the removal of lead and chromium. In 2001, Sinclair Casper Refining Company marked the extent of the ASP and backfilled it with clean fill material.  The Draft Permit covers includes a clean closure plan for the ASP.

 

The PEP is a formerly used unlined surface impoundment located on the north side of the North Platte River, near the North Evaporation Ponds.  The PEP received refinery wastewater from May 1991 to May 1992.  The PEP is not authorized for operation.  Refinery wastewater residues remain in the sides and bottom of the PEP.  The Draft Permit covers includes a clean closure plan for the PEP.

 

The Draft Permit covers requirements for corrective action of units (WMMU) which have been used for the generation, treatment, storage or disposal of waste material, and any area (AOC) having a probable release of a hazardous waste or hazardous constituent that is not necessarily from a WMMU.  As part of the corrective action process, Sinclair Casper Refining Company completed the Resource Conservation and Recovery Act (RCRA) Facility Investigation (RFI) in 2004 and submitted the Human Health and Ecological Risk Assessment Reports (Reports) in September 2006.  Sinclair Casper Refining Company submitted to WDEQ a Corrective Measures Study Report for High Priority areas in 2009 that was approved in March of 2010. A Medium and Low Priority Areas Corrective Measures Study Report that was approved in 2014. A Corrective Measures Implementation Work Plan for High Priority Areas was approved in September of 2011. A Medium and Low Priority Areas Corrective Measures Implementation Work Plan was approved in September of 2015. Final closure requirements will be evaluated at the time the refinery ceases operations.

 

  The interim measures currently being implemented at the refinery include:  operation of the Biosparge and Soil Vapor Extraction System to reduce contaminant concentrations in groundwater and control contaminant migration along the east boundary of the refinery; monitoring of the shallow and deep groundwater in the North Evaporation Ponds area; routine observations of the North Platte River to identify any potential releases to the river; implementation of a plan to recover free-phase hydrocarbon associated with groundwater throughout the refinery area; and operation of a boundary control system along the North Platte River to control any potential releases of contaminated groundwater and free-phase hydrocarbon to the river.

 

Beginning January 13, 2017, through February 27, 2017, the WDEQ is providing an opportunity to comment on the Draft Renewal Permit for the Sinclair Casper Refining Company.  The Draft Permit has been prepared as required by WDEQ/Hazardous Waste Management Rules and Regulations.  The Draft Permit, Fact Sheet, Permit Application, and Administrative Record are available for public inspection and copying at the following locations:  the Natrona County Public Library located at 307 East Second Street, Casper, WY 82601, and the Wyoming Department of Environmental Quality/Solid and Hazardous Waste Division located at 200 W. 17th Street, 2nd Floor, Cheyenne, Wyoming  82002.

 

Any person may submit written comments on the DRAFT Wyoming Refining Company Renewal Permit, may request a notice of the final permit decision, or request a public hearing.  Written comments and requests for a hearing will be accepted by WDEQ during the period January 13, 2017, through February 27, 2017.  Written comments or requests must be sent to the address listed below.   Written comments or requests must be received no later than 5:00 p.m. on February 27, 2017.

 

Luke Esch, Administrator

Wyoming Department of Environmental Quality

Solid and Hazardous Waste Division

200 West 17th Street, 2nd Floor

Cheyenne, Wyoming 82002

A request for a public hearing shall be in writing and shall state the nature of the issues proposed to be raised at the hearing.  All written comments received by the deadline shall be considered in making the final decision and shall be answered according to WDEQ/Hazardous Waste Management Rules and Regulations.  Each person who has submitted written comment or requested notice of the final permit decision will be notified.  This notice shall include reference to the procedures for appealing a decision on a hazardous waste management facility permit.

 

In accordance with the Americans with Disabilities Act, special assistance or alternative formats will be made available upon request for individuals with disabilities.

 

For additional information regarding this notice or the draft permit, contact PJ Wilber at 307-777-7746 or pj.wilber@wyo.gov