DSHW-2024-005718

April 9, 2024
John Amato, Project Manager
Refining Business Unit
Chevron Environmental Management Company
324 West El Segundo Blvd. (MO-142)
El Segundo, CA 90245
RE: Human Health and Ecological Risk Assessments
Chevron Salt Lake Refinery
Post-Closure Permit
UTD092029768
Dear Mr. Amato:
The Division of Waste Management and Radiation Control (the Division) has noticed that human health risk assessment and ecological risk assessment associated with chemicals of concerns
impacting the refinery the soil and groundwater from spills at the refinery. The Division requests that site-wide human health and ecological assessments be conducted upon the facility
closure in accordance with Utah Administrative Code R315-101. The ecological risk assessment will need to evaluate weight exposures across all spills, solid waste management units,
and areas of contamination at the refinery.
The requirement for human health and ecological risk assessments needs to be incorporated into the Post-Closure Permit in the next permit modification or the permit renewal in 2027,
whichever comes the first.
If you have any questions, please contact Hao Zhu at 801-558-9833.
Sincerely,
Paige Walton, Program Manager
Corrective Action Section
Division of Waste Management and Radiation Control
PW/HZ/wa
c: Dorothy Adams, Interim Director, Salt Lake County Health Dept.
Ron Lund, Environmental Health Director, Salt Lake County Health Dept.
Eric Peterson, Environmental Health Deputy Director, Salt Lake County Health Dept.
Brian Hatch, Health Officer, Davis County Health Department
David W. Spence, Deputy Director, Davis County Health Department
Jay Clark, Environmental Health Director, Davis County Health Department
Lauren Vander Werff, Chevron Salt Lake Refinery (Email) [e-mail]
Brett Mustoe, AECOM (Email) [e-mail]
Wil Pineda, AECOM (Email) [e-mail]
John Amato, Project Manager, Refining Business Unit,
Chevron Environmental Management Company (Email and Hard Copy)[e-mail]