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PG&E reports lower super‑emitter threshold, expanded coverage and faster repairs to cut distribution emissions
Summary
PG&E described updates to its super‑emitter detection program: lowering the threshold from 10 to 5 standard cubic feet per hour, expanding survey coverage, and planning more frequent surveys in high‑leak areas to reduce days‑open and emissions.
PG&E staff updated workshop attendees on the utility’s super‑emitter program, which uses vehicle‑mounted methane analyzers (Picarro) to detect large distribution leaks and prioritize faster repairs.
PG&E engineer Sami Ahmed said the program is based on research showing that a small fraction of distribution leaks (so‑called “super emitters”) account for a disproportionate share of distribution emissions. PG&E has lowered the detection threshold over several years — from 10 scfh in 2022 to 7 scfh in…
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