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John Rezac

Senior Geologist

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John’s 20-plus years of experience include planning and managing dozens of investigation and remediation projects, many involving RCRA corrective action, leaking underground storage tanks, and/or voluntary cleanup. He has conducted hundreds of Phase I environmental site assessments at facilities ranging from small gas stations to large coal-fired power plants and steel-production operations, and has completed NEPA environmental assessments for federal projects. He also routinely evaluates remediation feasibility and performs fate-and-transport modeling.

Before joining Barr, John was a senior geologist with Salt Lake City consulting firm Sage Environmental, LLC.


(801) 333-8430


Barr Engineering Co.
170 South Main Street
Salt Lake City, UT 84101

Phone: 801-333-8400
Fax: 801-333-8401
Toll free: 800-632-2277