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What Stack Test Data Can Tell You Beyond Compliance Key Takeaways Stack test data can support more than a comparison against an emission limit. It can help facility teams evaluate equipment performance, control efficiency and emissions assumptions. Operating conditions provide essential context. Load, fuel, process rate, control settings and other conditions influence how test resultsRead more

One Engine, Multiple Rules: How JJJJ, ZZZZ, Air Permits and Testing Fit Together Key Takeaways Engine compliance begins with classification. Fuel, ignition type, horsepower, construction date, operating purpose and the facility’s hazardous air pollutant source classification can all affect applicable requirements. Subpart JJJJ and Subpart ZZZZ address different regulatory programs, and some engine categories useRead more

Particulate Matter Stack Testing: How EPA Methods 1 Through 5 Work Together Particulate matter stack testing is a coordinated measurement process. Before a testing team can determine how much particulate matter is leaving a stationary source, it must identify a representative sampling location, measure the movement and composition of the exhaust gas, account for moistureRead more

Frequently Asked Questions About Stack Emissions Testing Stack emissions testing gives facility teams measured data they can use to demonstrate compliance, evaluate equipment performance and make informed operating decisions. Because every source, permit and test program is different, successful testing begins well before a crew arrives on site. The following answers cover common questions aboutRead more

Stack Emissions Testing for Dust Collectors: Methods, Compliance Drivers, and Best Practices Insights from The Stack Testing Experts at Encino Environmental Baghouses, also commonly known as “dust collectors,” are a critical element of industrial air pollution control, capturing particulate matter (PM) and hazardous air pollutants (HAPs) from process emissions. While a baghouse or dust collectorRead more

What Asphalt Plant Operators Need to Know About Air Emissions Compliance Under the Clean Air Act (CAA), hot mix asphalt (HMA) plants must comply with federal air emissions regulations, including periodic stack testing to verify compliance. In addition, many states and local jurisdictions impose their own requirements, creating a layered regulatory landscape that can beRead more

Stack Testing Services: Top 10 Essentials for Optimal Results Insights from Encino Environmental For affected facilities, required emissions tests aren’t just a regulatory obligation, they are essential tools for ensuring continued operations, efficiency, and safety. However, performing an accurate stack test and producing reliable reports is far from simple. The process involves precise instrumentation, knowledgeableRead more

In October 2023[AE1] [JC2] [JC3] , we published our blog article Reducing Methane Emissions in the Oil and Gas Sector: The Super-Emitter Response Program previewing the major components of the Environmental Protection Agency’s (EPA) Super Emitter Response Program included in the agency’s comprehensive update to 40 CFR Part 60 Subpart OOOOb, which focuses on standards of performance for crude oil and natural gas facilities. In this article we cover the final form of the Super-Emitter Response Program that was published in the Federal Register on March 8, 2024.