Seismic factor of safety

Seismic factor of safety means the factor of safety (safety factor) determined using analysis under earthquake conditions using the peak ground acceleration for a seismic event with a 2% probability of exceedance in 50 years, equivalent to a return period of approximately 2,500 years, based on the U.S. Geological Survey (USGS) seismic hazard maps for seismic events with this return period for the region where the CCR surface impoundment is located.

Source

40 CFR § 257.53

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Scoping language

The following definitions apply to this subpart. Terms not defined in this section have the meaning given by RCRA.

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