Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 5 - STATE AIR POLLUTION CONTROL BOARD
Chapter 40 - EXISTING STATIONARY SOURCES
Part II - Emission Standards
Article 57 - Emission Standards for Industrial Solvent Cleaning Operations in the Northern Virginia Volatile Organic Compound Emissions Control Area, 8-hour Ozone Standard (Rule 4-57)
Section 9VAC5-40-8600 - Test methods and procedures
Current through Register Vol. 41, No. 3, September 23, 2024
A. The provisions of 9VAC5-40-30 (Emission testing) apply.
B. The composite vapor pressure of organic compounds in cleaning materials shall be determined by quantifying the amount of each compound in the blend using ASTM "Standard Practice for Packed Column Gas Chromatography" for organics and ASTM "Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph" for water content (see 9VAC5-20-21), as applicable, and the following equation:
where:
Ppc = VOC composite partial pressure at 20ºC, in mm Hg.
Wi = Weight of the "i"th VOC compound, in grams, as determined by ASTM "Standard Practice for Packed Column Gas Chromatography" (see 9VAC5-20-21).
Ww = Weight of water, in grams as determined by ASTM "Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph" (see 9VAC5-20-21).
We = Weight of the "i"th exempt compound, in grams, as determined by ASTM "Standard Practice for Packed Column Gas Chromatography" (see 9VAC5-20-21).
Mwi = Molecular weight of the "i"th VOC compound, in grams per g-mole, as given in chemical reference literature.
Mww = Molecular weight of water, 18 grams per g-mole.
Mwe = Molecular weight of the "i"th exempt compound, in grams per g-mole, as given in chemical reference literature.
VPi = Vapor pressure of the "i"th VOC compound at 20ºC, in mm Hg, as determined by subsection C of this section.
C. The vapor pressure of each single component compound may be determined from ASTM "Standard Test Method for Vapor Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope" (see 9VAC5-20-21), from chemical reference literature, or from additional sources acceptable to the board.
Statutory Authority: § 10.1-1308 of the Code of Virginia; §§ 110, 111, 123, 129, 171, 172, and 182 of the federal Clean Air Act (40 CFR Parts 51 and 60).
