NYC 9/11 Public Portal Document
]VIHIS. I . LUUL I I LOHIVI NU. 192
A cleaning system appropriate for a specific masonry
adjacent masomy mortar joints.. The removal of material may not be appropriate for
paint/stain on mortar joints should be avoided
possible. if
Reducing the strength of the removal agent and/or
the pressure applied for removing
paint/stain can minimize "clean spots" left,on masonry. the
Masonry surfaces should be tested with non-staining ph
strips after removals are cgmpleted
order to ensure that the substrate has been
adequately neutralized. Neutralizing a surface
in
involves removing all chemical and/or cleaning agents
been neutralized can lead to subsequent damage of from the fabric. .A substrate that has not
the historic fabric.
Applied Paint (Signage) to Significant Interior
Historic Fabric: If paint (signage) is applied
to significant interior fabric (e.g. murals,
mosaics, , decorative metals) an
architectural and/or art conservator should be consulted experienced
possible to successfully remove applied overpaint regarding any treatment or removal. It is
from even the most decorative or fragile
substrates.
Health, Safety, and Environmental Issues:
• It is the responsibility of the Applicant to obtain
all
local, federal and state permits prior to the
commencement of work and adhere to all local, state and
federal laws with respect to the
application and disposal of potential hazardous waste
materials.
Sources:
AIC Ethics and Standards Committee. "AIC Code of
Ethics and Guidelines for Practice."
Revised August, 1994,
Grimmer, Anne E. "Dangers of Abrasive Cleaning to.
Historic Buildings." Preservation Brief
Number 6. Washington, DC: National Park Service, 1979.
New York Landmarks Conservancy. Historic
Building
and Rehabilitation. New York: John Wiley & Sons, Facades. The Manualfor Maintenance
Inc., 1997.
Weaver, Martin E. "Removing Graffiti from Historic
Masonry." Preservation Brief Number
38. Washington, DC: National Park Service, 1995.
• Note: National Park Service Preservation Briefs, including
those referenced in these
performance standards, are available on the Internet;
keyword Preservation Briefs.
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