Authority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11

Affected: IC 13-15; IC 13-17

Sec. 6. (a) Compliance with add-on control requirements shall be determined by performing emission tests as follows:

1. (1) Run at typical operating conditions and flow rates compatible with scheduled production during any emission testing.
2. (2) The initial emission test shall be performed, within ninety (90) days after the compliance date for the solvent cleaning operation or startup, when the control device is installed and operating to demonstrate compliance with the applicable emission control requirement.
3. (3) The test methods and procedures in 326 IAC 8-1-4(d) through 326 IAC 8-1-4(f) shall be followed.

(b) VOC content of solvents shall be determined in accordance with the following:

1. (1) Analysis by 40 CFR 60, Method 24*.
2. (2) Analytical data derived from a material safety data sheet (MSDS) or equivalent information from the supplier as long as it is based on 40 CFR 60, Method 24*.
3. (3) If diluted prior to use, a material balance calculation that combines 40 CFR 60, Method 24* analytical data or supplier information for the concentrated materials used to prepare the cleaning solvent and the proportions in which they are mixed to make the as-applied material.

(c) The composite partial vapor pressure of solvents shall be determined as follows:

1. (1) Determine the identity and quantity of each compound in a blended organic solvent using the manufacturer's product formulation data.

2. (2) Determine the vapor pressure of each pure VOC component by using one (1) of the following:

   1. (A) Standard reference texts.
   2. (B) ASTM Method D2879-92*, ASTM International, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania 19428.

3. (3) Calculate the composite partial vapor pressure of the cleaning material by using the following formula:

   Where:	Wi	=	Weight of the "i"th VOC compound, in grams
   	Ww	=	Weight of water, in grams
   	Wc	=	Weight of exempt compound, in grams
   	MWi	=	Molecular weight of the "i"th VOC compound, in g/g-mole
   	MWw	=	Molecular weight of water, in g/g-mole
   	MWc	=	Molecular weight of exempt compound, in g/g-mole
   	PPc	=	VOC composite partial vapor pressure at 20°C (68°F), in mmHg
   	VPi	=	Vapor pressure of the "i"th VOC compound at 20°C (68°F), in mmHg

*These documents are incorporated by reference. Copies may be obtained from the Government Printing Office, 732 North Capitol Street NW, Washington, D.C. 20401 or are available for review and copying at the Indiana Department of Environmental Management, Office of Air Quality, Indiana Government Center North, Tenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.

(Air Pollution Control Division; 326 IAC 8-17-6; filed Nov 3, 2009, 3:31 p.m.: 20091202-IR-326090221FRA; errata filed Nov 18, 2009, 3:42 p.m.: 20091216-IR-326090221ACA; readopted filed Oct 18, 2024, 2:09 p.m.: 20241113-IR-326230809RFA)