Fugitive Emissions Estimator
Estimate fugitive VOC and methane emissions from equipment components using EPA average emission factors. Enter component counts by type and service to calculate total emissions, check regulatory thresholds, and evaluate LDAR program benefits per 40 CFR Part 98 Subpart W, EPA Method 21, and NSPS OOOOa.
What Are Fugitive Emissions?
Unintentional leaks of VOCs and methane from process equipment components including valves, pump seals, compressor seals, flanges, and open-ended lines. EPA estimates these account for 5-15% of total facility GHG emissions.
EPA Estimation Methods:
Average Emission Factor: Component count-based (simplest)
Screening Value: Based on measured ppm levels
Correlation Equation: ppm-to-mass relationship
Regulatory Framework:
40 CFR Part 98 Subpart W (GHG reporting), EPA Method 21 (leak detection), NSPS OOOOa (new source standards), Clean Air Act Title V (major source permitting), API 2517 (evaporative loss from tanks).
📚 Learn the Theory
Understand fugitive emission mechanisms, EPA estimation methods, LDAR program design, and regulatory compliance requirements