CHALLENGE FOCUS AREA Midstream Operations SECTOR Oil and Gas SERVICE Noise Impact Assessment MAINLINE BLOCK VALVES PIPELINE BLOWDOWN In 2014 Patching Associates was retained by an engineering consulting firm on behalf of an oil and gas company to investigate the acoustical effects and assess noise impacts of future gas blowdown operations at three representative Mainline Block Valve (MLBV) sites along a proposed natural gas pipeline route in Brit

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