Workers will be onsite this week to prepare for the first phase of the Sitewide Odor Assessment at Ascon. Soil borings, each roughly 3 inches in diameter and of depths between ~3–20 feet, will be collected using a truck-mounted drill rig. These soil borings will be analyzed in laboratories to identify areas of the Site that may have the potential to generate odor during future cleanup work at Ascon. The field investigation will provide technical information that will determine specific treatability actions to further mitigate potential odor. There may be periodic noise from the soil boring equipment. Read more about the Odor Assessment field work here.

A truck-mounted drill rig, like the one above, will be used onsite during the Odor Assessment work.


  • SITEWIDE ODOR ASSESSMENT: Work is scheduled to begin January 19 and continue through mid-March.

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

    You may see: Workers, materials and equipment like water trucks, small truck-mounted soil boring rigs, and portable lavatories arriving onsite.

  • GATE INSTALLATION: Worker gates will be installed at either end of the northeast corner interim fence (on the earthen berm near Magnolia Street and Hamilton Avenue intersection). This work is located within the Ascon Site.

  • SECURITY: 24-hour onsite security continues. Security are 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. The most recent inspection was Thursday, January 14.
    • Regular cleanup maintenance is conducted within the Site and around the perimeter fence areas.
  • 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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