28 Leveraging Technologies to Reduce Emissions Real-time air readouts allow our refineries to protect the surrounding communities and take early response and mitigation actions even on small emissions sources. Furthering our commitment as a responsible operator and supplementing our existing monitoring programs, we are utilizing the Duvas DV3000, a real- time mobile air quality monitoring surveying system, for air quality screenings. The vehicle-mounted DV3000 is a gas analyzer that uses ultraviolet spectroscopy to identify and qualify up to 14 different gases, including benzene, SOx and NOx, at low part-per-billion levels. With an analyzer response time as short as one second, the DV3000 combines measurements with geographic mapping of gas concentrations, and enables rapid detection and source location of air emissions during monitoring. Anemometer: measures wind direction to locate the source of emissions Air sampler Valero refineries use optical gas imaging technology to detect VOC emissions and for routine equipment leak monitoring. DV3000 Mobile Air Quality Monitor In 2021, Valero undertook air quality screenings in our fence-line communities and verified all levels were under the applicable environmental standards. Watch a video about the DV3000 mobile air quality monitor.