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Historic Preservation - Technical Procedures

Spectitle:

Reducing Lead-Based Paint Hazards Using Interim Control Techniques On Windows

Procedure code:

0990003R

Source:

1994 Crm, Vol. 17, No. 4/1997 Windows Conference Paper

Division:

Finishes

Section:

Painting

Last Modified:

02/24/2012

Details:

Reducing Lead-Based Paint Hazards Using Interim Control Techniques On Windows



REDUCING LEAD-BASED PAINT HAZARDS USING INTERIM CONTROL TECHNIQUES
ON WINDOWS


THE 1995 HOUSING AND URBAN DEVELOPMENT (HUD) GUIDELINES REGARDING
THE EVALUATION AND CONTROL OF LEAD-BASED PAINT HAZARDS WERE
DEVELOPED IN ORDER TO PROVIDE GUIDANCE IN LEAD ABATEMENT/REDUCTION
WORK REQUIRED FOR FEDERALLY ASSISTED HOUSING PROJECTS.  THOUGH
THESE GUIDELINES ARE NOT ENFORCED ON PRIVATE HOUSING PROJECTS OR
PROJECTS INVOLVING OTHER BUILDING TYPES, THEY ARE A WELL-RECOGNIZED
REFERENCE FOR MAKING BUILDINGS LEAD-SAFE, AND THEIR USE AS A
RESOURCE IS RECOMMENDED IN ANY CONSTRUCTION PROJECT REQUIRING LEAD-
REDUCTION WORK.  FOR THIS REASON, THESE GUIDELINES ARE FREQUENTLY
REFERENCED IN THIS AND OTHER RELATED PROCEDURES.


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on removing lead-based
         paint from windows using interim control techniques.

    B.   Interim controls are temporary methods of controlling
         lead-based paint hazards and include special cleaning and
         dust removal procedures, stabilization of the existing
         paint film, and special treatment of friction and impact
         surfaces.  Abatement, on the other hand, is considered to
         be a permanent treatment for eliminating lead-based paint
         and may include complete removal of the paint or the
         feature/component itself.

    C.   Interim control techniques are preferred over abatement
         in preservation work since more original material can be
         retained and preserved.  However, regular maintenance is
         required and necessary in order for this type of strategy
         to be successful.  This works well in office environments
         with dedicated cleaning and maintenance staff.

    D.   For guidance in evaluating mitigation strategies for
         lead-hazard reduction, see 09900-03-S.  For general
         protection measures in lead-based paint hazard reduction
         work, see 09900-10-S.  For guidance in reducing lead-
         based paint hazards using abatement techniques or a
         combination of abatement and interim control techniques
         on windows, see 09900-02-R and 09900-04-R respectively.

    E.   See 01100-07-S for general project guidelines to be
         reviewed along with this procedure.  These guidelines
         cover the following sections:

         1.   Safety Precautions

         2.   Historic Structures Precautions

         3.   Submittals

         4.   Quality Assurance

         5.   Delivery, Storage and Handling

         6.   Project/Site Conditions

         7.   Sequencing and Scheduling

         8.   General Protection (Surface and Surrounding)

         These guidelines should be reviewed prior to performing
         this procedure and should be followed, when applicable,
         along with recommendations from the Regional Historic
         Preservation Officer (RHPO).


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   Red Devil, Inc.
         2400 Vauxhall Road
         Union, NJ  07083-1933
         201/688-6900
         800/423-3845

    B.   ProSoCo, Inc.
         755 Minnesota Avenue
         P.O. Box 1578
         Kansas City,  KS  66117
         800/255-4255 or 913/281-2700

    C.   Diedrich Technologies, Inc.
         7373 South 6th Street
         Oak Creek (Milwaukee), WI  53154
         800/323-3565 or 414/764-0058

2.02 MATERIALS

    NOTE:  Chemical products are sometimes sold under a common
    name.  This usually means that the substance is not as pure as
    the same chemical sold under its chemical name.  The grade of
    purity of common name substances, however, is usually adequate
    for general cleaning or stain removal work, and these products
    should be purchased when available, as they tend to be less
    expensive.  Common names are indicated below by an asterisk
    (*).

    A.   Trisodium Phosphate (TSP):

         NOTE:  THIS CHEMICAL IS BANNED IN SOME STATES SUCH AS
         CALIFORNIA.  REGULATORY INFORMATION AS WELL AS
         ALTERNATIVE OR EQUIVALENT CHEMICALS MAY BE REQUESTED FROM
         THE ENVIRONMENTAL PROTECTION AGENCY (EPA) REGIONAL OFFICE
         AND/OR THE STATE OFFICE OF ENVIRONMENTAL QUALITY.

         1.   Strong base-type powdered cleaning material sold
              under brand names.

         2.   Other chemical or common names include Sodium
              Orthophosphate; Tribasic sodium phosphate;
              Trisodium orthophosphate; TSP*; Phosphate of soda*;
              (also sold under brand names such as Red Devil).

         3.   Potential Hazards:  CORROSIVE TO FLESH.

         4.   Available from chemical supply house, grocery store
              or supermarket or hardware store.

         5.   Commercial TSP supplied by Red Devil, Inc.

    B.   Chemical paint stripper (ProSoCo, Inc., Diedrich
         Technologies, or approved equal).

    C.   Clean, potable water

    D.   Masking tape

    E.   Primer and paint (use same manufacturer)

    F.   Encapsulant paint (only for sills)

    G.   Deglossing agent

    H.   Screws or wood stops

    I.   Razor blade

2.02 EQUIPMENT

    A.   Putty knife

    B.   Sponge sanding block


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Cleaning and Dust Control: Clean window sills and troughs
         frequently (at least twice-a-week) by wiping the surface
         with a sponge or cloth soaked in a mixture of TSP and
         water.

         NOTE: CLEANING WILL ONLY BE EFFECTIVE IF PERFORMED ON A
         REGULAR, SCHEDULED BASIS.

    B.   Paint Stabilization: Similar to typical paint maintenance
         except for the use of water to control the spread of led
         dust.

         6.   Mist the surface with water and scrape off loose
              paint using a putty knife.
         
         7.   Feather edges using a sponge sanding block
              saturated with a deglossing agent.

         8.   Apply a good quality primer and top coat of paint.
              Use the same manufacturer.

              NOTE: THE APPLICATION OF AN ENCAPSULANT PAINT IS
              NOT CONSIDERED AN INTERIM CONTROLS, BUT RATHER AN
              ABATEMENT TECHNIQUE. ENCAPSULANT PAINTS ARE APPLIED
              SO AS TO COMPLETELY COVER THE POTENTIALLY HAZARDOUS
              AREA - TRAPPING ANY FAILING PAINT LAYERS UNDER ITS
              DURABLE, ELASTIC SKIN.  THESE PAINTS ARE ALSO QUITE
              EXPENSIVE AND CAN OBSCURE FINE DETAILING BECAUSE OF
              ITS THICK CONSISTENCY.

    C.   Treatment of Friction and Impact Surfaces: Friction and
         impact surfaces on windows include components that can
         become abraded each time the window is opened or closed,
         such as the sash, the jamb, the parting bead and the
         interior stop.

         1.   Mist the interior stop for the lower sash with
              water.

         2.   Score the edges with a razor blade and remove the
              stop.  NOTE: IF DESIRED, APPLY A STRIP OF MASKING
              TAPE OVER THE EDGE BEFORE SCORING.  THIS WILL AID
              IN CATCHING ANY PAINT THAT IS CHIPPED IN THE
              PROCESS.

         3.   Replace the stop, or if it is desirable to keep the
              existing stop, treat the friction surface as
              described below for the treatment of the sash.

         4.   Remove the sash.  If desired, both the upper an
              lower sash may be treated alike.  If the upper sash
              is painted shut, treatment of the lower sash only
              is acceptable.

         5.   Remove the paint from the friction edges - where
              the sash meets or rubs against other window
              components.  Remove the paint at least an inch on
              all faces of the sash.  The edge facing the jamb
              should not need treatment, as it is typically not
              painted.

              a.   Wet plane or wet scrape to remove the paint;
                   mist the surface with water and remove loose
                   paint using a putty knife or other tool for
                   scraping.

              b.   Feather the edges using a sponge block
                   saturated with a de-glossing agent.

         6.   Remove paint from the friction surfaces of the jamb
              and parting stop by wet planing and wet sanding as
              described above.

         7.   Apply a good quality primer and top coat to the
              window components and reassemble the window.

    D.   Treatment of "Chewable and Accessible" Surfaces: These
         are most notably window sills or other similarly
         projecting feature at an accessible height.

         1.   Abatement level treatment is recommended for these
              types of surfaces and includes completely removing
              the lead-based paint using a chemical stripper, wet
              scraping or wet sanding.

         2.   Or, apply an encapsulant paint to the surface
              following manufacturer's instructions.  This method
              would be preferred if the sill has some significant
              detailing or if, for some reason, it is important
              to retain the existing paint/material.

              NOTE: SILLS ARE GENERALLY THE ONLY WINDOW FEATURES
              AN ENCAPSULANT PAINT IS RECOMMENDED FOR USE ON.
              THESE TYPES OF PAINTS ARE NOT EFFECTIVE ON FRICTION
              SURFACES AND ARE, THEREFORE, NOT TYPICALLY
              RECOMMENDED FOR WINDOW WORK.

    F.   Fixing Windows in Place: If desired, this type of
         temporary control can eliminate contamination from
         friction surfaces.  This method is not desirable for
         buildings in which the opportunity for fresh outside air
         is important.

         1.   Anchor the sash to the channel of the jamb using
              the inconspicuous placement of metal hardware or
              wood stops.

         2.   After the window has been fixed in place, treat the
              individual features using paint stabilization
              techniques or encapsulant paints described above.

                         END OF SECTION