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Historic Preservation - Technical Procedures

Spectitle:

Removing Lubricating Oil Stains From Terrazzo Floors

Procedure code:

0940006R

Source:

Developed For Hspg (Nps - Sero)

Division:

Finishes

Section:

Terrazzo

Last Modified:

02/24/2012

Details:

Removing Lubricating Oil Stains From Terrazzo Floors



REMOVING LUBRICATING OIL STAINS FROM TERRAZZO FLOORS


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on removing oil stains
         from terrazzo floors.

    B.   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).

    C.   For general information on the characteristics and
         maintenance of terrazzo, see 09400-01-P.


PART 2---PRODUCTS

2.01 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 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.   For New Lubricating Oil Stains:

         1.   Fuller's earth, hydrated lime, whiting or portland
              cement

    B.   For Old Lubricating Oil Stains:

         1.   Acetone (C3H6O):

              a.   A volatile fragrant flammable liquid ketone
                   used chiefly as a solvent and in organic
                   synthesis and found abnormally in urine.

              b.   Other chemical or common names include
                   Dimethyl ketone; Propanone

              c.   Potential Hazards:  VOLATILE AND FLAMMABLE
                   SOLVENT

              d.   Available from chemical supply house or
                   hardware store.

         2.   Amyl acetate:

              a.   Other chemical or common names include Amyl
                   acetic ester; 1-pentanol acetate; Banana oil*;
                   Pear oil*.

              b.   Potential Hazards:  FLAMMABLE.

              c.   Available from chemical supply house,
                   drugstore or pharmaceutical supply
                   distributor, paint store or photographic
                   supply distributor (not camera shop).

         3.   White flannel

         4.   Glass pane

    -OR-

         Benzine (NOT BENZENE):

         1.   A petroleum distillate that is used especially as a
              paint or varnish thinner.

         2.   Other chemical or common names include Mineral
              Spirits*; Naphtha*; Petroleum spirits*; Solvent
              naphtha*.

         3.   Potential Hazards:  TOXIC AND FLAMMABLE.

         4.   Safety Precautions:

              a.   AVOID REPEATED OR PROLONGED SKIN CONTACT.

              b.   ALWAYS wear rubber gloves when handling
                   mineral spirits.

              c.   If any chemical is splashed onto the skin,
                   wash immediately with soap and water.

         5.   Available from construction specialties
              distributor, hardware store, paint store, or
              printer's supply distributor.

    D.   Clean, potable water

2.02 EQUIPMENT

    A.   Wooden Paddle or Trowel

    B.   Stoneware Jar

    C.   Shallow Enameled Pan

    D.   Electric or battery powered scrubbing machines


PART 3---EXECUTION

3.01 EXAMINATION

    A.   Examine the terrazzo surface carefully to determine the
         cause of staining before proceeding with any cleaning
         operation.

3.02 ERECTION, INSTALLATION, APPLICATION

    NOTE:  THE FOLLOWING TREATMENTS SHOULD BE USED BY TRAINED AND
    EXPERIENCED PERSONNEL.  IMPROPER USE MAY RESULT IN BLEACHING
    THE TERRAZZO MATRIX, IF A COLOR DYE WAS ADDED AT THE TIME OF
    INSTALLATION.  TEST BEFORE PROCEEDING.

    A.   For New Lubricating Oil Stains:

         1.   Mop up excess oil from the surface immediately.

         2.   If the stain is fresh, cover the spot with fuller's
              earth or dry powdered material such as hydrated
              lime, whiting, or dry portland cement.

         3.   Allow to sit for 24 hours.

         4.   Thoroughly rinse the surface with clean, clear
              water and blot dry with clean towels.

         5.   Repeat the process as required to achieve the
              desired level of cleanliness.

    B.   For Old Lubricating Oil Stains:

         1.   Saturate white flannel in a mixture of equal parts
              of acetone and amyl acetate to form a thick paste.

         2.   Thoroughly wet the surface to be treated with
              clean, clear water.

         3.   Apply the mixture to the stained area in a 1/4 inch
              thick layer using a wood or plastic spatula.

         4.   Cover the flannel with a slab of concrete or pane
              of glass.

         5.   Keep the flannel cloth saturated until the stain is
              removed.

              NOTE:  If the solvent tends to spread the stain, a
              larger piece of cloth should be used.

         6.   Thoroughly rinse the area with clean, clear water
              and blot dry with clean towels.

         7.   Repeat the process as necessary to achieve the
              desired level of cleanliness.

         -OR-

         Using a stiff, non-metallic bristle brush, scrub the
         stained surface with benzine; rinse with clean, clear
         water and allow to dry.

                             END OF SECTION