Administrative Code

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Virginia Administrative Code
Title 9. Environment
Agency 5. State Air Pollution Control Board
Chapter 40. Existing Stationary Sources
1/22/2021

9VAC5-40-8600. Test methods and procedures.

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:

https://law.lis.virginia.gov/RISImages/489832047070DEQKS_files/image001.gif

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.

Historical Notes

Derived from Volume 32, Issue 07, eff. February 1, 2016.

Website addresses provided in the Virginia Administrative Code to documents incorporated by reference are for the reader's convenience only, may not necessarily be active or current, and should not be relied upon. To ensure the information incorporated by reference is accurate, the reader is encouraged to use the source document described in the regulation.

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