Section 20-778. ARCHITECTURAL AND INDUSTRIAL MAINTENANCE COATING – TESTING REQUIREMENTS

 

778.1For the purpose of determining compliance with the VOC content limits in the Table of Standards in § 774.10, the VOC content of a coating shall be determined by using the procedures described below in paragraphs (a) or (b), as appropriate. The VOC content of a tint base shall be determined without colorant that is added after the tint base is manufactured as follows:

 

(a)With the exception of low solids coatings, determine the VOC content in grams of VOC per liter of coating thinned to the manufacturer's maximum recommendation, excluding the volume of any water and exempt compounds. Determine the VOC content using the following equation:

 

VOC Content = (Ws - Ww - Wec)

 (Vm - Vw - Vec)

where:

 

VOC content = grams of VOC per liter of coating;

 

Ws= weight of volatiles, in grams;

 

Ww= weight of water, in grams;

 

Wec= weight of exempt compounds, in grams;

 

Vm= volume of coating, in liters;

 

Vw= volume of water, in liters; and

 

Vec= volume of exempt compounds, in liters; or

 

(b)For low solids coatings, determine the VOC content in units of grams of VOC per liter of coating thinned to the manufacturer's maximum recommendation, including the volume of any water and exempt compounds. Determine the VOC content using the following equation:

 

VOC Content (ls) =(Ws - Ww - Wec)

(Vm)

 

where:

 

VOC Content (ls) = the VOC content of a low solids coating in grams per liter of coating;

 

Ws= weight of volatile, in grams;

 

Ww= weight of water, in grams;

 

Wec= weight of exempt compounds, in grams; and

 

Vm= volume of coating, in liters.

 

778.2 To determine the physical prop­erties of a coating in order to perform the calculations in §778.1, the reference method for VOC content is U.S. EPA Method 24, except as provided in § 778.3 and 778.4. An alter­native method to determine the VOC content of coatings is SCAQMD Method 304-91 (Revised February 1996), adopted by reference in § 778.5(j). The exempt com­pounds content shall be determined by SCAQMD Method 303-91 (Revised August 1996), adopted by reference in § 778.5(h)(3). To determine the VOC content of a coat­ing, the manufacturer may use U.S. EPA Method 24, or an alternative method, as provided in § 778.3, formula­tion data, or any other reasonable means for predicting that the coating has been formulated as intended including but not limited to quality assurance checks and record keeping. However, if there are any inconsistencies between the results of a Method 24 test and any other means for determining VOC content, the Method 24 results will govern, except when an alternative method is approved as specified in § 778.3. The Department may require the manufacturer to conduct a Method 24 analysis.

 

778.3Alternative test methods may be used if they are demonstrated to provide results that are acceptable for purposes of deter­mining compliance with § 778.2, and have been reviewed and approved in writing by the Department and the U.S. EPA.

 

778.4 Analysis of methacry­late multi-component coatings used as traffic marking coat­ings shall be conducted according to a modification of U.S. EPA Method 24 in 40 C.F.R. Part 59, Subpart D, Appendix A. This method has not been approved for methacrylate multi-component coatings used for purposes other than traffic marking coatings or other classes of multi-component coatings.

 

778.5 The following test methods are incorporated by reference herein, and shall be used to test coatings subject to the provisions of §§ 773 through 778:

 

(a)The flame spread index of a fire-­retardant coating shall be determined by the ASTM Designation E 84-99, Standard Test Method for Surface Burning Characteristics of Building Mater­ials, (see § 799, fire-retardant coating);

 

(b)The fire-resistance rating of a fire-resistive coating shall be determined by ASTM Designation E 119-98, Standard Test Methods for Fire Tests of Building Construction Materials, (see § 799, fire-resistive coating);

 

(c)The gloss of a coating shall be determined by ASTM Designation D 523-89 (1999), Standard Test Method for Specular Gloss, (see § 799, flat coating, non-flat coating, non-flat high gloss coating, and quick dry enamel);

 

(d)The metallic content of a coating shall be determined by SCAQMD Method 318-95, Determination of Weight Percent Elemen­tal Metal in Coatings by X-Ray Diffraction, SCAQMD Laboratory Methods of Analysis for Enforcement Samples, (see § 799, metallic pig­mented coating);

 

(e)The acid content of a coating shall be determined by ASTM Designation D 1613-96, Standard Test Method for Acidity in Volatile Solvents and Chemical Intermediates Used in Paint, Varnish, Lacquer and Related Products (see § 799, pre-treatment wash primer);

 

(f)The set-to-touch, dry-hard, dry-to-touch, and dry-to-recoat times of a coating shall be determined by ASTM Designation D 1640-95, Standard Methods for Drying, Curing, or Film Formation of Organic Coatings at Room Temperature, (see § 799, quick dry enamel and quick-dry primer, sealer, and under­coater). The tack free time of a quick-dry enamel coating shall be determined by the Mechanical Test Method of ASTM Designation D 1640-95;

 

(g)The chalkiness of a surface shall be determined using ASTM Designation D 4214-98, Standard Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films, (see § 799, specialty primer, sealer, and undercoater);

 

(h)The following compounds are exempt from the test methods above and shall be analyzed by the following alternative methods:

 

(1)Compounds that are cyclic, branched, or linear, completely methy­lated siloxanes, shall be analyzed as exempt com­pounds for compliance with § 778 by BAAQMD Method 43, Determination of Volatile Methylsilox­anes in Solvent-Based Coatings, Inks, and Related Materials, BAAQMD Manual of Procedures, Vol­ume III, adopted November 6, 1996, (see § 778.2);

 

(2)Parachloroben­zotrifluoride shall be analyzed as an exempt compound for compliance with § 778 by BAAQMD Method 41, Determination of Volatile Organic Compounds in Solvent-Based Coatings and Related Materials Containing Parachlorobenzotri­fluoride, BAAQMD Manual of Procedures, Vol­ume III, adopted December 20, 1995, (see § 778.2); and

 

(3)Compounds exempt under U.S. EPA Method 24, which shall be ana­lyzed by SCAQMD Method 303-91 (Revised 1993), Determination of Exempt Compounds, SCAQMD Laboratory Methods of Analysis for Enforcement Samples, (see § 778.2);

 

(i)The VOC content of a coating shall be determined by U.S. EPA Method 24 as it exists in 40 CFR Part 60, Appendix A, Determination of Volatile Matter Content, Water Content, Density, Volume Solids, and Weight Solids of Surface Coatings, (see § 778.2);

 

(j)Alternatively, the VOC content of coatings may be analyzed by either U.S. EPA Method 24 or SCAQMD Method 304-91 (Revised 1996), Determination of Volatile Organic Compounds (VOC) in Various Materials, SCAQMD Laboratory Methods of Analysis for Enforcement Samples (see § 778.2);

 

(k)The VOC content of methacrylate multicomponent coatings used as traffic marking coatings shall be analyzed by the procedures in 40 CFR Part 59, Subpart D, Appen­dix A, Determination of Volatile Matter Content of Methacrylate Multicomponent Coatings Used as Traf­fic Marking Coatings, (September 11, 1998), (see § 778.4); and

 

(l)The VOC content of stone consolidants shall by analyzed by ASTM E2167-01, “Standard Guide for Selection and Use of Stone Consolidants” (see § 799, Stone Consolidant).

 

authority

The Director of the District Department of the Environment (DDOE or Department), pursuant to the authority set forth in sections 5 and 6(b) of the District of Columbia Air Pollution Control Act of 1984, as amended, effective March 15, 1985 (D.C. Law 5-165 (DCAPC); D.C. Official Code §§ 8-101.05 and 8-101.06(b)(2008 Repl.)), section 107(4) of the District Department of the Environment Establishment Act of 2005, effective February 15, 2006 (D.C. Law 16-51; D.C. Official Code § 8-151.07(4)(2008 Repl.)), Mayor's Order 98-44, dated April 10, 1998, and Mayor’s Order 2006-61, dated June 14, 2006.

source

Notice of Final Rulemaking published at 58 DCR 11286, 11405 (December 30, 2011).