Frequent Questions

What are the land disposal restrictions (LDR) alternative soil treatment standards?

Pursuant to the LDR alternative soil treatment standards in §268.49(c)(1), there are two approaches to achieving compliance.  Either:

  • hazardous constituents must be reduced by at least 90 percent through treatment so that no more than 10 percent of their initial concentration remains, or
  • hazardous constituents must not exceed ten times the universal treatment standards (10 x UTS) in §268.48. 

In addition to the treatment standards in §268.49(c)(1), prior to land disposal,  a generator or treatment, storage, or disposal facility must treat soils that exhibit the characteristic of ignitability, corrosivity, or reactivity to eliminate these characteristics (§268.49(c)(2)).

EPA defines a hazardous constituent as a regulated constituent specified in the treatment standards in §268.40 or an underlying hazardous constituent (UHC) as defined in §268.2(i), which means any constituent that is listed in the UTS Table at §268.48, except for fluoride, selenium, sulfides, vanadium.

Additional guidance on the LDR alternative soil treatment standards for hazardous waste is available in the following documents:  

Guidance on Demonstrating Compliance with the Land Disposal Restrictions (LDR)
Alternative Soil Treatment Standards: Final; July 2002 (RCRA Online 50919) [PDF 314K]
Monthly Call Center Report Question; August 2002 (RCRA Online 14628) [PDF 4K]
Monthly Call Center Report Question; April 2000 (RCRA Online 14445) [PDF 9K]
Monthly Call Center Report Question; October 1999 (RCRA Online 14409)

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