The Department of Toxic Substances Control (DTSC) will oversee the installation of interim fencing near the intersection of Hamilton Avenue and Magnolia Street to provide a temporary barrier connecting the 16-foot barrier fence currently in place along the east and north sides of Ascon. The fence will include a privacy screen to provide a visual and dust barrier. No excavation work is necessary for the installation of the interim fencing. There will be periodic noise to install the approximately 20 to 25 fence posts, using a post driver. Each post is anticipated to take approximately 5 minutes to install.

Work to install the fence is anticipated to begin on Monday, December 14, 2020, and is expected to be completed within 2 to 3 days.


  • SUPPLY DELIVERY: Supplies for ongoing stormwater management and fencing supplies may be delivered.

    skid steer

    You may see: A skid steer and sandbags being brought to Ascon, as well as a small number of workers, with activity primarily in the northwest zone.

  • SECURITY: 24-hour onsite security continues. Security may not be 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 resumed after the Thanksgiving holiday week on November 30 and 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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