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Airport staff brief Commission on leaded avgas, transition barriers and potential costs for unleaded fuel
Summary
Staff presented data on leaded avgas exposure, federal targets to phase out leaded aviation fuel by 2030, technical constraints (STC/ASTM), distribution challenges and a rough $360,000 estimate for adding a third fuel tank to carry unleaded fuel.
Airport staff presented a technical briefing on avgas and the challenges of moving from leaded to unleaded aviation fuels, summarizing environmental context, regulatory steps and practical constraints.
The presentation cited EPA and Washington State University data showing local airborne lead exposure patterns and explained the regulatory distinction between STC (Supplemental Type Certificate) approvals and ASTM standardization. Staff said STC‑approved unleaded fuels cannot be mixed in the same historic leaded fuel tank with non‑STC fuels, which creates distribution and infrastructure hurdles. The FAA and EPA target a 2030 transition away from low‑lead avgas, but staff described the reality of limited current availability and distribution network readiness.
Staff also noted infrastructure implications for local airports: a previously discussed estimate for adding a third fuel tank was about $360,000, and the Commission has purchased a smaller mobile refueling truck as an interim measure. Presenters suggested ongoing monitoring, outreach to distributors and continued education for the community; Rich (airport staff) and others offered to present the material to local groups.
No regulatory or procurement decisions were made at the meeting; commissioners thanked staff for the technical briefing and encouraged continued work to monitor federal and industry developments.
