Frisco Air Monitoring Shows No Lead Exceedances at Exide Site

City environmental contractors completed perimeter air monitoring during excavation work at the Former Operating Plant site during late October and early November. The monitoring period ran from October 23 through November 18 2025 and combined real time particulate sampling with laboratory analysis of high volume air samples for lead and cadmium. Monitoring locations included upwind and downwind stations and field teams used E Samplers for continuous particulate measurement while crews employed dust suppression during active excavation.

The summary documented that no real time particulate concentrations exceeded the project Take Action or Stop Work levels during the monitoring period. Laboratory analysis of the high volume samples detected trace amounts of lead on a single sampling date October 30 but those results remained below the established Take Action and Stop Work thresholds. Cadmium results were not reported as exceeding thresholds. The filed documentation includes a summary letter, daily real time summaries in Attachment A, and laboratory reports with a data usability summary in Attachment B.

These results provide the most recent publicly available field and lab monitoring records for the Exide site remediation sequence. For local residents who have raised concerns about airborne contaminants during excavation, the report offers specific technical data showing that mitigation measures in place during the late October and early November activities kept monitored concentrations below the project response levels. The daily summaries and attached laboratory data allow independent review of dates and station level observations for community members tracking progress.

City and contractor oversight of monitoring and dust control will remain relevant as work continues at the site. Continued transparent reporting of real time monitor readings and laboratory confirmations will be important for sustaining public confidence. Residents seeking detailed station level data and the full laboratory reports can review the posted attachments for the October 23 through November 18 monitoring period to follow ongoing remediation activity and verification of air quality safeguards.