Pit F Telemetry Air Monitoring
The Department of Toxic Substances Control (DTSC) has directed the excavation and transport of Pit F waste materials to a permitted landfill in Central California. This work is scheduled to start in June 2021 and conclude in August 2021.
In addition to 24/7 air monitoring conducted at the perimeter of the Site and at neighborhood stations, a telemetry-based air monitoring network is collecting additional air quality data during work hours for Pit F cleanup.
Telemetry-based air monitors around the Pit F tent capture a snapshot of air monitoring data. The Pit F telemetry network records total volatile organic compounds (VOCs) and dust data upwind and downwind of the Pit F tent. The Site contribution (concentrations detected downwind of the work area excluding upwind or background) are displayed and compared to the Site action limits, confirming air concentrations are below action limits.
If a brief telemetry reading is above an action level it does not mean that there was a harmful exposure or that the community’s health is at risk. Air monitoring action levels are used during the work at Ascon to guide mitigation actions, stop work actions, and prompt increased actions to control potential odor, emissions, or dust. For the purposes of evaluating potential community exposures air data are evaluated over 24-hour periods and longer. The air data are submitted to DTSC, available for review by SCAQMD, and shared on Actively Monitoring Air Quality on asconhb.com.
If a reading is above an action limit, it does not mean that the community’s health is at risk. Scroll down to learn more on how to read the Telemetry results.