[Federal Register Volume 83, Number 21 (Wednesday, January 31, 2018)]
[Rules and Regulations]
[Page 4430]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-01971]


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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 110, in the Table of Contents to 
Appendix A to Part 300, revise the following headings:

Appendix A to Part 300--The Hazard Ranking System

Table of Contents

* * * * *
7.1.1 Observed release/observed contamination/observed exposure.
7.1.2 Potential to release/potential for exposure.
* * * * *
7.2.3 Persistence/degradation.
* * * * *
7.3.3 Weighting of targets within an area of subsurface 
contamination.
* * * * *

List of Figures, Figure number

* * * * *
5-1 Overview of the soil exposure and subsurface intrusion pathway.
* * * * *

List of Tables, Table number

* * * * *
5-1 Soil exposure component scoresheet.
5-2 Hazardous waste quantity evaluation equations for soil exposure 
component.
* * * * *
5-11 Subsurface intrusion component scoresheet.
5-12 Structure containment.
5-13 Depth to contamination.
5-14 Effective porosity/permeability of geological materials.
5-15 Vertical migration factor values.
5-16 Values for vapor pressure and Henry's constant.
5-17 Vapor migration potential factor values for a hazardous 
substance.
5-18 Degradation factor value table.
5-19 Hazardous waste quantity evaluation equations for subsurface 
intrusion component.
5-20 Health-based benchmarks for hazardous substances in the 
subsurface intrusion component.
5-21 Weighting factor values for populations within an area of 
subsurface contamination.
* * * * *
[FR Doc. 2018-01971 Filed 1-30-18; 8:45 am]
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