OAR Policy and Guidance Metarecord

Document Title/Subject: Appendix J to Part 60 -- How to Determine Henry's Law Constants, Fm Values, Fr Values, and Fe Values for Organic Compounds Related Documents:	Signed by: EPA Administrator Signature Date: 28 Sep 98 Contact: Mary Tom Kissell OAQPS/ESD/WCPG (919) 541-4516 kissell.mary@epa.gov	Filename(s): http://www.epa.gov/ttn/oarpg/t1/fr_notices/appj.pdf URL(s):
Regulatory Authority: Title 1	Division: Emission Standards Division (OAQPS)	Submitted By: kissell.mary
Document Type: Proposed & Final Preambles & Rules	EPA Document Number: Federal Register:	Supersedes:
Subject Category: AIR Toxics VOC WASTES WATER Other	Keywords: Benzene Emissions Volatile organic compounds VOCs emission factors biodegradation factors	Terms: Air pollutants Chemicals Clean Air Act CAA Wastewater
Abstract: This appendix J to part 60 is proposed. The comment period will end 60 days after the appendix is published in the Federal Register. The anticipated publication date is early to mid-December. You should use this appendix if you need to: 1. Determine whether a chemical has a Henry's law constant at 25o C that is less than 0.1 y/x atmosphere per mole fraction. 2. Determine a fraction measured (Fm) value for a chemical. 3. Subtract the concentration of a chemical from a Method 25D concentration. 4. Determine the fraction removed (Fr) value for a chemical that has a Henry's law constant at 25o C that is greater than or equal to 0.1 y/x atmosphere per mole fraction. 5. Determine the fraction emitted (Fe) value for a chemical that has a Henry's law constant at 25o C that is greater than or equal to 0.1 y/x atmosphere per mole fraction. 6. Calculate a Henry's law constant at a specific temperature using a Henry's law constant at a different temperature for the same chemical.

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