PHMSA Issues Letter of Interpretation of Requirements for Calculating Gas Vapor Dispersion Zones

In a letter to Weaver’s Cove LNG issued yesterday, the U.S. Pipeline and Hazardous Material Safety Administration (PHMSA) states that it has found deficiencies in the SOURCE5 gas vapor dispersion model and the use of this model will no longer be considered in compliance with PHMSA’s regulations.

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