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JJJJ Emission Testing

Throughout our website, we cover various aspects of emission testing requirements and compliance standards, including the Subpart ZZZZ regulations for compression and spark-ignited reciprocating internal combustion engines. But there’s also another set of EPA standards that many engine users must observe — New Source Performance Standards (NSPS) Part JJJJ, also known as 40 CFR Part 60, Subpart JJJJ or simply “Quad J.” 40 CFR Part 60, Subpart JJJJ regulates the emissions generated by stationary spark-ignited internal combustion engines, including emergency engines, non-emergency natural gas engines, and landfill or digester gas engines. It’s true that (at least in theory) the manufacturer of the engine is supposed to meet JJJJ standards, — but the fact that it’s impossible to control or predict fuel quality from location to location usually places that responsibility in the lap of the owner/operator. The emissions that must be monitored and controlled include nitrogen oxides (NOx), carbon monoxide (CO), and volatile organic chemicals (VOC). The maximum allowed emissions vary according to the type and power capacity of the engine, and are measured in grams per brake horsepower-hour (g/bhp-hr). Non-emergency gas engines of all horsepower are limited to NOx levels of 1.0, CO levels of 2.0, and VOC levels of 3.0. By contrast, emergency engines of 25 to 130 hp have ceilings of 10 NOx and 386 CO, with no stated VOC requirements. Erthwrks can run a number of tests to check your engines’ compliance with JJJJ standards. If we discover an issue that needs to be addressed, we can recommend corrective measures ranging from selective or non-selective catalytic reduction to oxidation catalysts, depending on what kind of engines you’re running.  

Stationary Engine Testing

  • 40 CFR Part 60 Subpart JJJJ – NOx, CO, and VOC testing
  • Pre and Post Catalyst testing for pollutant reduction usually via 40 CFR Part 63 Subpart ZZZZ – Formaldehyde (HCOH) and CO reduction efficiency
  • Permit by Rule/Source Performance Guarantees
    • Every state and sometimes every source has specific guidelines
    • Examples of this are:
    • 40 CFR Part 60 Subparts KKKK – Turbine Compliance Testing
    • 40 CFR Part 60 Subparts GG – Turbine Compliance Testing

Erthwrks pipeline testing team uses a variety of testing methods to provide results in the ways that best serve our clients: