PathCarbon technical notes https://www.pathcarbon.com/feed.xml 2026-10-23T09:00:00+05:30 PathCarbon Noise limits in India and the IFC guidelines: which one applieshttps://www.pathcarbon.com/tn-608.html2026-10-23T09:00:00+05:30India's Noise Rules set limits by area category over a 16-hour day and an 8-hour night. IFC sets hourly limits at each receptor, plus a 3 dB cap on any rise over background. A lender-financed project in India has to pass both. CBAM for Indian exporters: what to have ready before September 2027https://www.pathcarbon.com/tn-607.html2026-10-17T09:00:00+05:30The EU's carbon border charge has applied to imports since 1 January 2026. Your EU buyer pays it, but how much they pay depends on data only your plant can supply. Marine piling under the 2024 NOAA thresholdshttps://www.pathcarbon.com/tn-606.html2026-10-17T09:00:00+05:30NOAA Fisheries replaced its 2018 marine mammal acoustic guidance in October 2024. Hearing groups were renamed and several injury thresholds moved, so models built on the 2018 tables can report the wrong zones. Steel route intensity and what it means for an iron metallics projecthttps://www.pathcarbon.com/tn-605.html2026-10-17T09:00:00+05:30Per tonne of crude steel, the blast furnace route emits more than three times the CO₂ of scrap-based electric arc furnaces. Direct reduced iron sits between them. What changed in the 2021 WHO air quality guidelineshttps://www.pathcarbon.com/tn-604.html2026-10-17T09:00:00+05:30Of the seven guideline values that existed in both editions, WHO tightened five, left ozone unchanged and raised SO₂. A baseline that meets national standards can still sit several times above the 2021 values. Most Scope 3 numbers are secondary data, and the disclosure should say sohttps://www.pathcarbon.com/tn-603.html2026-10-16T09:00:00+05:30For companies reporting to CDP, supply chain emissions are on average 26 times operational emissions, and in our experience most of that figure still comes from average-data factors. Three inputs decide most dispersion resultshttps://www.pathcarbon.com/tn-602.html2026-10-16T09:00:00+05:30In our experience, the meteorological record, the source parameters and the treatment of buildings and terrain account for most of the spread between two credible models of the same stack. Twelve weeks of monitoring is not automatically a baselinehttps://www.pathcarbon.com/tn-601.html2026-10-16T09:00:00+05:30Reviewers rarely reject a baseline for having too few data points. They reject it when the report does not show that the data represents the site.