Exide Vernon Facility Update
October 21, 2025 – City Council Meeting
Poonam Patel
Branch Chief
14 Facility Milestones Completed
• October 2024 – Decontamination and deconstruction of fourteen non-regulated structures at the Facility were completed. • February 2025 – All closure-related activities were completed. • April 2025 – Final Closure Certification Report was received, and the DTSC closure verification letter was issued.
• May 2025 – SCAQMD Title V permit was closed.
• June/July 2025 – Five ambient air monitoring stations were removed. 3 14 Non-Regulated Building Before Decontamination and Deconstruction 4 14 Non-Regulated Buildings After Decontamination and Deconstruction Former Air Monitoring Station Location Map
54 • Facility ambient air monitoring
stations:
o Southwest (SW)
o Southeast (SE)
o Northeast (NE)
o On-Site North (OSN)
o Mid (Facility and SCAQMD air
monitors located here)
• After Title V permit closure, the
ambient air monitors were
removed in June/July 2025.
Source: VERT
6 Permit limit 0.1 micrograms per cubic meter (µg/m3)
1/7/24 High Wind
Speeds/Wind Gusts
Daily Ambient Air Monitoring - Lead
1/8/25 Regional
High Winds/Wildfires
Daily Ambient Air Monitoring - Arsenic
Permit limit 10 nanograms per cubic meter (ng/m3)
1/8/25 Regional
High Winds/Wildfires
Activities in Progress and Timeline
• 2Q 2025 – Annual groundwater and SI monitoring field work completed • 3Q 2025 – Annual groundwater and SI monitoring reports (draft pending) • 3Q 2025 – Screening Level Humal Health Risk Assessment and Qualitative Ecological Assessment (SLHHRA) report (revised draft received July 11, 2025) • 2Q and 3Q 2025 – Soil, soil gas, and groundwater Data Gap investigation field work • 4Q 2025 – Remedial Investigation (RI) Report (pending Data Gap investigation) • 3Q 2025 – Begin soil vapor extraction (SVE) pilot test implementation • Ongoing Facility Operations and Maintenance (O&M) will continue.
Ongoing Facility Operations and Maintenance (O&M) Activities Site Security
Treatment Plant
Non-Operational
Maintenance
Stormwater
Management
Permit(s)
Compliance
Maintain Facility
Grounds (e.g.,
housekeeping,
utility repairs)