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Historic Preservation - Technical Procedures

Spectitle:

Removing Coffee Stains From Terrazzo Floors

Procedure code:

0940008R

Source:

Developed For Hspg (Nps - Sero)

Division:

Finishes

Section:

Terrazzo

Last Modified:

02/24/2012

Details:

Removing Coffee Stains From Terrazzo Floors



REMOVING COFFEE STAINS FROM TERRAZZO FLOORS


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on removing coffee
         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.   Glycerine:

         1.   A sweet syrupy hygroscopic trihydroxy alcohol
              usually obtained by the saponification of fats and
              used especially as a solvent and plasticizer.

         2.   Other chemical or common names include Glycerol;
              Glyceryl hydroxide; Glycyl alcohol; 1,2,3-
              propanetriol; Propenyl alcohol.

         3.   Potential Hazards:  FLAMMABLE.

         4.   Available from chemical supply house, drug store or
              hardware store.

    B.   Clean, potable water

2.02 EQUIPMENT

    A.   Wooden Paddle or Trowel

    B.   Shallow Enameled Pan


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 TREATMENT 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.   Saturate a cloth in glycerine diluted with 4 times its
         volume in water and apply to stain.

    B.   Thoroughly the surface with clean, clear water and allow
         to dry.

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

    Note:  See also treatment for blue ink stains for other stain
    removing solutions, 09400-01-R.

                             END OF SECTION