All material used for repair or encapsulation of asbestos
material shall have a flame spread rating, fireproofing and smoke
characteristics similar to the material being repaired or encapsulated. Also,
the encapsulant shall not alter the insulating characteristics of the material
subject to encapsulation, and the encapsulant shall not add excess weight to
the material increasing the potential that the material may delaminate from
itself (cohesion failure), or from its substrate (adhesion failure).
Encapsulation of asbestos material shall be conducted in accordance with the
following:
(a) Regulated abatement
work area preparation. The regulated abatement work area shall be pre-cleaned,
isolated and negative air established in accordance with Subpart 56-7 of this
Part.
(b) Repair materials. Damaged
and missing areas of existing materials shall be repaired with non-asbestos
material. The material shall adhere to existing surfaces and provide a base for
application of encapsulating agents.
(c) Asbestos material removal. Loose or
hanging ACM, PACM or asbestos material shall be removed in accordance with the
requirements of section
56-8.4 of this Subpart.
(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 and negative air has
been established.
(e) Bridging
encapsulants.
(1) Thickness requirements.
Bridging encapsulants shall be applied to provide the manufacturer's specified
minimum dry-film thickness over sprayed asbestos surfaces.
(2) Color requirement When using bridging
encapsulant, a different color for each coat shall be used.
(f) Latex paint. Latex paint shall
not be used as a bridging encapsulant. It shall be considered a dilute lockdown
encapsulating agent and used only as a coating for lockdown purposes for
surfaces during cleanup procedures as per Subpart 56-9 of this Part.
(g) Penetrating encapsulants.
(1) Penetration requirements. 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 asbestos material shall be removed and checked to verify full
depth of penetration.
(3) Color
requirement. Each coat of penetrating encapsulant shall be color coded as per
manufacturer's recommendations, if any, except for the prohibition of pigment
use.
(h) Methods of
application. Encapsulants shall be applied using airless spray equipment as
follows:
(1) Spraying pressure. Spraying
shall be performed at the lowest pressure range possible to minimize asbestos
fiber 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 hazardous air pollutants, as defined
by NYS DEC 6 NYCRR section 200.1(ag), into the air when applied or during
curing.
(i) Encapsulant
fire-resistance properties. If the asbestos material has been used for fire
retardation or protection of structural members or both, the encapsulant
material used shall have a flame spread rating, fireproofing and smoke
characteristics similar to the material being repaired or
encapsulated.
(j) Marking or
labeling. Encapsulated ACM, PACM, or asbestos material shall be conspicuously
marked or labeled in order to warn persons of its presence.
(k) Cleanup. Waste cleanup shall be in
accordance with section
56-8.5 of this Subpart.
(l) Final cleaning and clearance air
sampling. Final cleaning and clearance air sampling shall be in accordance with
Subpart 56-9 of this Part.
