was prepared in response to a written request from the City of Vallejo,
California, to the U.S. Geological Survey (USGS). By letter of October
4, 2002, the City requested that the USGS "provide advice to the
Citys LNG Health and Safety Committee on its review of a potential
liquid natural gas project" on the southern portion of Mare Island.
The City specifically requested that the USGS advise the committee on
potential hazards including fault rupture, earthquake ground motion, soil
failure during earthquakes, tsunami and seiche, and landslides. The City
requested that the USGS: (1) comment on these hazards, (2) describe its
degree of confidence in its opinions, and (3) describe the scope of additional
studies that will be needed if the City enters into an agreement with
project sponsors. Advice was also requested on the selection of the safe
shutdown and operating basis earthquakes as specified in the NFPA 59A
standard (NFPA, 2001).
This review of published reports and other publicly available information indicates that all of the hazards on which the USGS was asked to comment should be considered for the proposed project on the southern portion of Mare Island. Available information differs greatly for each of these potential hazards, and adequate understanding for design will require detailed site-specific investigations.
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