Detailed account of a natural gas pipeline, valve failure, resulting in fires / explosions.
Clues?
https://www.aria.developpement-durable.gouv.fr/wp-content/files_mf/FD_27681_Ghislengheinv_2004ang.pdf
Massachusetts explosion considerations.
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Are there telemetry cables run within the pipeline(s) (stations) suppling N. Andover / Andover?
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Any witnesses yet? Homeowners?
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Any reports of vibrations underground?