Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 219 - ORGANIC MATERIAL EMISSION STANDARDS AND LIMITATIONS FOR THE METRO EAST AREA
Subpart A - GENERAL PROVISIONS
Section 219.110 - Vapor Pressure of Organic Material or Solvent
Current through Register Vol. 48, No. 38, September 20, 2024
a) If the organic material or solvent consists of only a single compound, the vapor pressure must be determined by ASTM Method D2879-86 (incorporated by reference in Section 219.112 of this Part) or the vapor pressure may be obtained from a publication such as: Boublik, T., V. Fried and E. Hala, "The Vapor Pressure of Pure Substances," Elsevier Scientific Publishing Co., New York (1973); Perry's Chemical Engineer's Handbook, McGraw-Hill Book Company (1984); CRC Handbook of Chemistry and Physics, Chemical Rubber Publishing Company (1986-87); and Lange's Handbook of Chemistry, John A. Dean, editor, McGraw-Hill Book Company (1985).
b) Except as provided in subsection (d), if the organic material or solvent is in a mixture made up of both organic material compounds and compounds which are not organic material, the vapor pressure must be determined by the following equation:
where:
|
Pom |
= |
Total vapor pressure of the portion of the mixture which is composed of organic material; |
|
n |
= |
Number of organic material components in the mixture; |
|
i |
= |
Subscript denoting an individual component; |
|
Pi |
= |
Vapor pressure of an organic material component determined in accordance with subsection (a); |
|
Xi |
= |
Mole fraction of the organic material component of the total organic mixture. |
c) If the organic material or solvent is in a mixture made up only of organic material compounds, the vapor pressure must be determined by ASTM Method D2879-86 (incorporated by reference in Section 219.112) or by the above equation.
d) For hand-wipe cleaning solvents used at aerospace facilities subject to Section 219.219(g)(2), the composite vapor pressure of a cleaning solvent consisting of multiple components must be determined by the following equation:
where:
|
PPc |
= |
Composite vapor pressure of the cleaning solvent in mmHg at 20 °C; |
|
n |
= |
Number of components in the cleaning solvent; |
|
i |
= |
Subscript denoting an individual VOM-containing component; |
|
j |
= |
Subscript denoting an individual non-VOM component; |
|
Wi |
= |
Weight of a VOM-containing component in grams; |
|
Wj |
= |
Weight of a non-VOM component in grams; |
|
Ww |
= |
Weight of water in grams; |
|
MWi |
= |
Molecular weight a VOM-containing component in grams per gram-mole; |
|
MWj |
= |
Molecular weight of a non-VOM component in grams per gram-mole |
|
MWw |
= |
Molecular weight of water in grams per gram-mole; |
|
VPi |
= |
Vapor pressure of a VOM-containing component in mmHg at 20 °C. |
