Field work at the Ascon Landfill Site during the week of May 4 is planned to include:

NORTH BERM STABILIZATION: The Department of Toxic Substances Control (DTSC) is overseeing emergency repair work to an earthen berm at Ascon. The managed excavation work began on April 21, with incremental amounts of berm material removed each day per DTSC direction. As of the end of day May 1, approximately half the berm estimated material planned for excavation during this repair has been excavated and placed into a covered treatment zone within the Ascon site.

North Berm repair work is expected to be conducted every morning during this week. Inspection of the North Berm remains in place during this time. A reinforced plastic cover is placed over the North Berm area in advance of rain, should weather conditions require it.

DTSC is onsite providing oversight. Air quality professionals with handheld monitoring equipment will be directly in the work zone, in addition to Site perimeter and offsite community air monitoring. More details about this work can be found at Stabilization of North Berm. Daily updates are provided during the excavation phase of this work.

What you may see:

  • Workers entering the Ascon site prior to 7 a.m. for tailgate safety briefings and health screenings.
  • Workers in appropriate Personal Protective Equipment (PPE) for this specific work. This includes hard hat, steel toe boots, safety vest, safety glasses, face masks and/or face shields. All workers may add additional PPE at their discretion and are provided with all necessary equipment and hygiene supplies to conduct the work safely.
  • Equipment such as excavators, skid steer, water trucks, manlift, dump truck, and equipment to apply odor suppressant foams and mists.

SAFETY MESSAGE: Work at Ascon is being conducted under strict safety protocols regarding COVID-19, which among other actions include restrictions on Site entrance, health and safety screening, a fulltime onsite health and safety officer, adherence to hygiene practices, and physical distancing. These practices also apply to air quality professionals and other team members who may be outside the fence or at air monitoring locations in the community. 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.

SITEWIDE: Regular inspections are conducted by Orange County Vector Control of the onsite detention basins and other areas of the Ascon site where water may be detained to prevent runoff. These inspections typically are conducted monthly. Active mitigation measures by Vector Control are protective of the community, as well as onsite workers, to prevent mosquitoes and other pests.

SITEWIDE: Stormwater management is subject to inspection by the City stormwater inspector. Ascon conducts stormwater inspections in advance of forecasted rain as an ongoing essential activity which continues under the current State executive order. Rain-related activity may include pumping out stormwater from onsite some ponded areas to other areas of the Ascon site. There will be continued inspection and maintenance of stormwater management measures to maintain compliance with Ascon stormwater permit.

  • Learn more about stormwater management at Ascon on under the Our Safety Commitment Click on “Learn More” to read the explainer.

SITEWIDE AND OFFSITE: Air quality monitoring continues 24/7, both on the Ascon site and at offsite community locations

For more information about Ascon’s air monitoring and data sharing, please visit Actively Monitoring Air Quality on this website. This data also 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”.

INTERIOR: Inspection of SCAQMD Rule 1166 treatment cell will be conducted to maintain treatment cell integrity and compliance with permit conditions.

EASTERN ZONE: Regular inspection of the “Pit F” tent will be conducted.

SITEWIDE: Weed abatement will be conducted as needed throughout the Site as part of stormwater management and fire protection. Plant overgrowth is removed near silt fences as part of necessary weed abatement, leaving roots in place to help prevent erosion.

Equipment used for this work may include:

  • Small power equipment, such as a weed wacker or mower

SITEWIDE: Dust and odor mitigation measures continue to be implemented. This includes applying a non-toxic odor suppressant material in excavated and graded zones which forms a hard clay-based shell, covering excavated materials with reinforced plastic covers, and also use of a water truck to mist interior roadways and areas where field work is occurring. Learn more about these ongoing activities and other activities conducted to maintain a safe cleanup project under the Our Safety Commitment tab.

SITEWIDE: Soil sealant will be applied to access and interior roads as a routine dust control action.

HAMILTON AND MAGNOLIA STREETS: Workers will conduct routine cleanup and removal of trash and debris thrown at and between the concrete base for the 16-foot fence around the outside of Ascon.

SITEWIDE: Supplies needed for the North Berm repair work and for ongoing Site maintenance are expected for delivery.

SITEWIDE: 24-hour onsite security continues.

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