[Code of Federal Regulations]
[Title 40, Volume 21]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR258.14]

[Page 396]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
                   CHAPTER I--ENVIRONMENTAL PROTECTION
                           AGENCY (CONTINUED)
 
PART 258--CRITERIA FOR MUNICIPAL SOLID WASTE LANDFILLS--Table of Contents
 
                    Subpart B--Location Restrictions
 
Sec. 258.14  Seismic impact zones.

    (a) New MSWLF units and lateral expansions shall not be located in 
seismic impact zones, unless the owner or operator demonstrates to the 
Director of an approved State/Tribe that all containment structures, 
including liners, leachate collection systems, and surface water control 
systems, are designed to resist the maximum horizontal acceleration in 
lithified earth material for the site. The owner or operator must place 
the demonstration in the operating record and notify the State Director 
that it has been placed in the operating record.
    (b) For the purposes of this section:
    (1) Seismic impact zone means an area with a ten percent or greater 
probability that the maximum horizontal acceleration in lithified earth 
material, expressed as a percentage of the earth's gravitational pull 
(g), will exceed 0.10g in 250 years.
    (2) Maximum horizontal acceleration in lithified earth material 
means the maximum expected horizontal acceleration depicted on a seismic 
hazard map, with a 90 percent or greater probability that the 
acceleration will not be exceeded in 250 years, or the maximum expected 
horizontal acceleration based on a site-specific seismic risk 
assessment.
    (3) Lithified earth material means all rock, including all naturally 
occurring and naturally formed aggregates or masses of minerals or small 
particles of older rock that formed by crystallization of magma or by 
induration of loose sediments. This term does not include man-made 
materials, such as fill, concrete, and asphalt, or unconsolidated earth 
materials, soil, or regolith lying at or near the earth surface.

[56 FR 51016, Oct. 9, 1991; 57 FR 28627, June 26, 1992]