[Federal Register Volume 83, Number 21 (Wednesday, January 31, 2018)]
[Rules and Regulations]
[Pages 4430-4431]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-01972]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 300


Addition of a Subsurface Intrusion Component to the Hazard 
Ranking System

CFR Correction

    In Title 40 of the Code of Federal Regulations, Parts 300 to 399, 
revised as of July 1, 2017, on page 117, in Appendix A to Part 300, the 
definition of ``source'' is reinstated to read as follows:

Appendix A to Part 300--The Hazard Ranking System

* * * * *

1.1 Definitions

* * * * *
    Source: Any area where a hazardous substance has been deposited, 
stored, disposed, or placed, plus those soils that have become 
contaminated from migration of a hazardous substance. Sources do not 
include those volumes of air, ground water,

[[Page 4431]]

surface water, or surface water sediments that have become 
contaminated by migration, except: In the case of either a ground 
water plume with no identified source or contaminated surface water 
sediments with no identified source, the plume or contaminated 
sediments may be considered a source.
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[FR Doc. 2018-01972 Filed 1-30-18; 8:45 am]
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