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Subpart 56-13

ENCAPSULATION PROCEDURES

Sec.
56-13.1     General requirements

Historical Note:Subpart (§56-13.1) filed July 7, 1987 eff. July 28, 1987.

§ 56-13.1   General requirements.

     Encapsulation of asbestos material shall be conducted in accordance with the following:

     (a)   Work area preparation.  The work area shall be cleaned and isolated in accordance with Subpart 56-8 of this Part.

     (b)   Repair materials.  Damaged and missing areas of existing materials shall be repaired with nonasbestos material. The material shall adhere to existing surfaces and provide a base for application of encapsulating agents.

     (c   Asbestos material removal.  Loose or hanging asbestos material shall be removed in accordance with the requirements of Subpart 56-12 of this Part.

     (d)   Testing of encapsulants.  Encapsulants shall be field-tested prior to use by applying each to a small area to determine suitability for the material to be encapsulated. Testing shall be conducted only after the isolation barriers are in place.

     (e)   Bridging encapsulants.   (1)  Thickness requirement. Bridging encapsulants shall be applied to provide the manufacturer's specified number of inches of minimum dry-film thickness over sprayed asbestos surfaces.

 

     (2)   Color requirement.  When using a bridging encapsulant, a different color for each coat shall be used.

     (f)   Penetrating encapsulants.  (1)  Penetration requirement. Penetrating encapsulants shall be applied and penetrate existing asbestos material to the substrate.

 

     (2)  Testing of penetration.  During treatment with a penetrating encapsulant, selected random core samples of the asbestos material shall be removed and checked to verify full depth penetration.

     (3)  Color requirement.  Each coat of encapsulant shall be color-coded as per manufacturer's recommendations, if any, except for the prohibition of pigment use.

     (g)   Method of application.  Encapsulants shall be applied using airless spray equipment.

 

     (1)   Spraying pressure.  Spraying shall be performed at the lowest pressure range possible to minimize asbestos release.

     (2)  Spray tip.  The optimum spray tip shall be chosen on the basis of the viscosity and percent solids of the encapsulant. The cone projection of the tip shall be as specified by the manufacturer.

     (3)  Subsequent coats.  Each subsequent coat of encapsulant shall be applied at a 90-degree angle to the preceding coat application or per manufacturer's specifications.

     (4)  Encapsulant solvent or vehicle.  The encapsulant solvent or vehicle shall not be or contain a volatile material. It shall not release toxic substances into the air when applied or during curing.

     (h)   Encapsulant properties.  If the asbestos material has been used for fire retardation and/or protection of structural members, the encapsulant shall have high flame-retardant and low toxic fume/smoke emission characteristics.

     (i)   Latex paint.  Latex paint shall be considered a dilute encapsulating agent and used only as a coating for all surfaces during cleanup procedures. It shall not be used as an encapsulant.

     (j)   Marking or labeling.  Encapsulated asbestos material shall be conspicuously marked or labeled in order to warn persons of its presence.

     (k)   Cleanup.  Cleanup shall be in accordance with Subpart 56-15 of this Part.

Historical Note:  Sec. filed July 7, 1987; amd. filed Oct. 18, 1991 eff. Jan. 1, 1992.

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