DID YOU KNOW?
The Ascon Team continues to make progress on construction of the engineered cap. Current efforts are focused on completing the “top deck liner system”, which includes installation of geomembrane and geofabric layers topped with two feet of compacted clean soil, as well as the “side slope liner system”, which consists of two feet of low-permeability compacted clean soil and two feet of compacted clean cover soil. This phase of work is anticipated to be completed by the end of 2027, dependent on permitting, weather and Site conditions.
Map Showing Final Condition of the Ascon Engineered Cap
As ongoing Final Remedy work continues to make progress, these Weekly Site Updates will transition to every two weeks. Our biweekly updates will continue to keep you informed about the ongoing work, progress and share relevant updates!
For additional information on the engineered cap, you can view the posterboards from the 2025 DTSC community open house here. If you have any questions, please call the Ascon information line at 714-388-1825 or send an email to info@asconhb.com.
SITEWIDE ACTIVITIES
FIELD WORK: Grading of soils will continue throughout the Site. Placement of geomembrane and geofabric, layers of the engineered cap, continues.
During this phase of work, personnel may also be onsite on Saturdays to conduct Site work and equipment maintenance from 7 a.m. to 5 p.m.
Geonet installation as part of the engineered cap, July 2026
Compacted cover soil installation as part of the engineered cap, July 2026
INSPECTIONS:
- DTSC is the lead regulatory agency for the Ascon project and conducts inspections at Ascon.
- The City of Huntington Beach continues its regular stormwater inspections of Ascon. Site staff will be at Ascon weekly for routine inspections and daily during extended rain events as needed to monitor the Site stormwater controls. Ascon remains in compliance with stormwater pollution prevention requirements.
- Regular inspections are conducted by Orange County Mosquito and Vector Control District (OCMVCD) in areas of the Ascon Site where water may be detained. Active mitigation measures are implemented by OCMVCD to protect the community, as well as onsite workers, from mosquitoes.
SECURITY: 24-hour, 7 days per week, onsite security continues during construction activities. Security is not always visible at the entrance gates. Unannounced visitors without official business or agency oversight of Ascon are not permitted to enter the Site. Trespassers will be reported to the Huntington Beach Police Department and DTSC.
You may see: Flashlights or headlights from vehicles after dark concluding daily activities and providing security at the 38-acre Site.
AIR MONITORING
Dust and total VOC monitoring is conducted 24/7 at upwind and downwind stations on the Ascon Site, documenting effective dust control measures.
Where to find air monitoring data: To view archived air monitoring results posted by DTSC on Envirostor, click on “Community Involvement Documents” and scroll to “Updates and Information.” Air monitoring data are also available on asconhb.com.
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SEE SOMETHING? HAVE A QUESTION? Call our information line: 714-388-1825 or email us at info@asconhb.com.
Have a Question or Concern?
Please contact the Ascon community information line at 714-388-1825 or email info@asconhb.com. If there is a potential emergency, please call 911. Sign up for AsconAlert, an opt-in community alert system for the Ascon project here.
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