Form – Investigation brief

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NOPSEMA conducted an investigation into Schlumberger Australia Pty Ltd's Otway Basin 2D Marine Seismic Survey (January-April 2020) following environmental performance concerns. A November 2020 regulatory declaration triggered review after marine mammal observer reports revealed higher-than-anticipated interactions with blue whales—an endangered species under the Environment Protection and Biodiversity Conservation Act 1999—both within and outside the designated Biologically Important Area. The investigation aimed to map seismic acquisition areas against blue whale detections and buffer zones, and assess whether Schlumberger's response actions complied with environmental plan requirements and legislative obligations. Document types included investigation briefs, environmental performance reports, and marine mammal observer data.