[Code of Federal Regulations]
[Title 40, Volume 24]
[Revised as of July 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR257.8]

[Page 380]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 257_CRITERIA FOR CLASSIFICATION OF SOLID WASTE DISPOSAL FACILITIES 
AND PRACTICES--Table of Contents
 
  Subpart B_Disposal Standards for the Receipt of Conditionally Exempt 
 Small Quantity Generator (CESQG) Wastes at Non-Municipal Non-Hazardous 
                          Waste Disposal Units
 
Sec. 257.8  Floodplains.

    (a) Owners or operators of new units, existing units, and lateral 
expansions located in 100-year floodplains must demonstrate that the 
unit will not restrict the flow of the 100-year flood, reduce the 
temporary water storage capacity of the floodplain, or result in washout 
of solid waste so as to pose a hazard to human health and the 
environment. 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 purposes of this section:
    (1) Floodplain means the lowland and relatively flat areas adjoining 
inland and coastal waters, including flood-prone areas of offshore 
islands, that are inundated by the 100-year flood.
    (2) 100-year flood means a flood that has a 1-percent or greater 
chance of recurring in any given year or a flood of a magnitude equalled 
or exceeded once in 100 years on the average over a significantly long 
period.
    (3) Washout means the carrying away of solid waste by waters of the 
base flood.