During the sitewide odors assessment work, a series of borings will be established in a grid across the Ascon Site in the remaining areas planned for excavation. Each boring will be advanced to the planned excavation depth.

The field investigation work is not expected to generate odor. Air quality technicians will be present during sampling. You can learn more about the work here, and you can see the latest air quality monitoring results from Ascon here.


  • MAINTENANCE: Regular maintenance will be conducted within the Site and around the perimeter fence areas, including onsite activity regarding installation or maintenance of stormwater management measures.

  • SITEWIDE ODOR ASSESSMENT: Preparation for scheduled work began the week of January 19, and work will continue through April.

    • Work will be conducted between the hours of 7 a.m. and 6 p.m., with personnel arriving earlier.
    • There will be periodic noise during boring drilling.

    You may see: Workers, materials and equipment like fencing, stormwater management materials (e.g., sandbags), water trucks and truck-mounted soil boring rigs may be arriving onsite. Drill rigs may occasionally make hammering and other noises.

  • SECURITY: 24-hour onsite security continues. Security is not always visible at the entrance gates. The Ascon security personnel are primarily within the Site conducting daytime and nighttime patrols of the 38-acre property. In addition to 24/7 onsite security, there are regular visits by air quality technicians, Site inspectors and Site maintenance personnel.


    • DTSC continues its ongoing weekly inspections of Ascon.
    • City of Huntington Beach continues its regular stormwater inspections of Ascon.
    • Regular inspection of the “Pit F” tent will be conducted.
    • Regular inspections are conducted by Orange County Mosquito and Vector Control District of the onsite detention basins and other areas of the Ascon Site where water may be detained.
  • NEARBY ACTIVITIES: Please note there are activities unrelated to Ascon at the former tank farm property, south of Ascon and adjacent to Magnolia Street.


Air monitoring continues both on the Ascon Site and at community locations. For more information about Ascon’s air monitoring and data sharing, please visit the Actively Monitoring Air Quality page on this website. Data is submitted to DTSC and shared on their online document archive, Envirostor. To view archived air monitoring results posted by DTSC on Envirostor, click on “Community Involvement Documents” and scroll to “Updates and Information.”


Work at Ascon is being conducted under Site safety protocols regarding COVID-19. These practices apply to air quality professionals and other team members who may be outside the fence conducting work. We ask for the community’s support of these safety practices by maintaining physical distancing to allow these professionals to focus on their work and stay safe.

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