Alabama Administrative Code › Title 335 - ALABAMA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT › AIR DIVISION - AIR POLLUTION CONTROL PROGRAM › Chapter 335-3-6 - CONTROL OF ORGANIC EMISSIONS › Section 335-3-6-.16 - Test Methods And Procedures

Current through Register Vol. 42, No. 9, June 28, 2024
(1)
Determination of Volatile
				Organic Content of Surface Coatings
.
(a) This method applies to paint, varnish,
				lacquer, and surface coatings which are air-dried or force-dried.
(b) This method does not apply to any coating
				system requiring a special curing process such as:
1. exposure to temperatures in excess of
				110° C (230° F) to promote thermal cross-linking; or
2. exposure to ultraviolet light to promote
				cross-linking.
(c) For
				the purposes of this method, the applicable surface coatings are divided into
				three classes. They are:
1.
Class
				I: General Solvent-Type Paints
. This class includes white linseed
				oil outside paint, white soya and phthalic alkyd enamel, white linseed
				o-phthalic alkyd enamel, red lead primer, zinc chromate primer, flat white
				inside enamel, white epoxy enamel, white vinyl toluene modified alkyd, white
				amino modified baking enamel, and other solvent-type paints not included in
				Class II.
2.
Class II:
				Varnishes and Lacquers
. This class includes clear and pigmented
				lacquers and varnishes.
3.
Class III: Water Thinned Paints
. This class includes
				emulsion or latex paints and colored enamels.
(d) For the purposes of this method, a
				representative sample of the surface coating shall be obtained at the point of
				delivery to the coater or any other point in the process that the Director
				approves.
(e) The volatile organic
				content of the sample shall be determined as follows:
1. Assign the coating to one of the three
				classes in subparagraph (c) of this paragraph. Assign any coating not clearly
				belonging to Class II or III to Class I.
2. Determine the density Dm (in grams/cubic
				centimeter) of the paint, varnish, lacquer, or related product according to the
				procedure outlined in ASTM 1475-60, Standard Method of Test for density of
				Paint, Varnish, Lacquer, and Related Products. Then, depending on the class of
				the coatings, use one of the following specified procedures to determine the
				volatile content:
(i)
Class
				I
. Use the procedure in ASTM 2369-73, Standard Method of Test for
				Volatile Content of Paints.
(I) Record the
				following information:
W1 = Weight of dish and sample, grams
W2 = Weight of dish and sample after heating, grams
S = Sample weight, grams.
(II) Compute the volatile organic content Cv
				(in grams/liter of paint) as follows:
See Formula at
				  http://www.alabamaadministrativecode.state.al.us/docs/adem/3ADEM6.htm#T1
(III) To convert grams/liter to
				pounds/gallons, multiply Cv by 8.3455 x 10-3.
(ii)
Class II
. Use
				the procedure in ASTM D 1644-59 Method A, Standard Methods of Test for
				Nonvolatile Content of Varnishes (Do not use Method B).
(I) Record the following information:
A
= Record of dish, grams
B
= Weight of sample used, grams
C
= Weight of dish and content after heating,
				  grams.
(II) Compute the
				volatile organic content Cv (in grams/liter) as follows:
See Formula at
				  http://www.alabamaadministrativecode.state.al.us/docs/adem/3ADEM6.htm#T1
(III) To convert grams/liter to
				pounds/gallon, multiply Cv by 8.3455 x 10-3.
(iii)
Class III
. Use
				the procedure in ASTM D 2369-73, Standard Method of Test for Volatile Content
				of Paints.
(I) Record the same information as
				specified in subparagraph (e)2.(i) of this paragraph.
(II) Determine the water content P (in
				percent water) of the paint according to the procedure outlined in Federal
				Standards 141a, Method 4082.1, Water in Paint and Varnishes (Karl Fisher
				Titration Method).
(III) Compute
				the nonaqueous volatile matter content Cv (in grams/liter) as follows:
See Formula at
				  http://www.alabamaadministrativecode.state.al.us/docs/adem/3ADEM6.htm#T1
(IV) To convert grams/liter to
				pounds/gallon, multiply Cv by 8.3455 x 10-3.