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Fugitive Emissions from Component Count

Methane · EPA AP-42 §5.3 · Subpart W §98.232

Component Counts (gas service)

Valves

—

Connectors

—

Pump seals

—

Open-ended lines

—

PRVs

—

Other (sample/instrument)

—

Modifiers

Gas CH₄ fraction

%

Gas price

$/mscf

GWP CH₄

—

LDAR credit (if program in place)

%

📚 Learn the Theory

Component-count fugitive inventories: EPA AP-42 §5.3 emission factors, the heavy-tailed leak distribution, and LDAR credit application.

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Engineering Basis

Default factors are gas-service per EPA AP-42 §5.3 and Subpart W §98.232.
For Subpart W reporting, prefer measured emission rates over default factors.
LDAR credit reflects observed reduction from quarterly OGI surveys (typical 60-80%).
Standards: EPA AP-42 §5.3, EPA Subpart W §98.232, API Compendium, OGMP 2.0.