Community and compliance air monitoring of dust emissions from soil disturbance and combustion pollutants from on-site construction equipment, and from offsite trucks hauling sediment.

Tetra Tech oversaw environmental aspects of the Devil’s Gate Reservoir Restoration Project by Los Angeles County Public Works (LACPW). The project entailed removing 1.3 million cubic yards of wildfire debris sediment. Tetra Tech and CET Engineering operated an air monitoring network of Aeroqual AQS 1 stations for compliance purposes and to monitor potential air quality impacts. These stations, approved by the California Air Resources Board, South Coast Air Quality Management District, and the local community group, tracked ozone, particulate matter (PM10 and PM2.5), nitrogen dioxide (NO₂), black carbon (BC), and meteorological data in real-time.

The community was sensitive to air pollution concerns from 425 daily truck movements during sediment removal. In addition to the on-site monitors, stations were installed near the site perimeter to collect air quality data in the community. Using Aeroqual Cloud to receive real-time feedback and alerts, LACPW applied best management practices to mitigate emissions and relieve potential environmental and public health risks. Tetra Tech used an application to pull data from Aeroqual Cloud automatically and calculate the Air Quality Index (AQI). The public could view the AQI and local air quality readings on a community website.

Sharing air quality data helped to ease community concerns. On-site compliance monitoring ensured activities conformed to Rule 403 for fugitive dust emissions. Aeroqual’s low-touch solutions and data tools minimized site visits, saving time and costs. The project restored flood control capacity, offering recreational spaces and over 70 acres of rejuvenated wildlife habitat.

Los Angeles County Public Works plan, design, build and maintain modern infrastructure that uplifts all communities of Los Angeles County. With a vision to become the most trusted public agency in the region, their core values of safety, human health, inclusivity and innovation set them apart.

Tetra Tech is a global provider of high-end consulting, leading with science to create a more sustainable future. Their vision is to change lives through science, technology, and innovation. Their goal is to improve the lives of 1 billion people around the world by 2030 by helping to create more resilient and sustainable communities.

Aeroqual develops integrated monitoring and software systems underpinned by industry-leading sensor technology to support environmental, health, and safety professionals in protecting people and the planet from the impact of air pollution. That’s why governments, industry, researchers, and consultants trust Aeroqual to deliver actionable data for their air quality monitoring projects.