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Special Cleaning Consideration <br />one time every month the terrazzo finish in the reflection pool on the north entry to the <br />Court House will be stripped, cleaned and polished. Terrazzo is made up of natural and <br />manufactured materials, so the cleaning and polishing process must be exact. Any <br />deviation from the care of this material, for example substitution of chemicals or altering <br />the cleaning process, can damage it. For this reason we have outlined the steps we will <br />take to service this area <br />First step in this process is to remove the existing polish and clean the surface with Jasco <br />stripper and `Bane Knuckles Ultra Stripper". According to the NTMA (National Terrazzo <br />& Mosaic Association), the proper method of cleaning is to use a neutral cleaning <br />solution with a pH factor between 7.0 and 10.0. The cleaner must be free of harmful <br />A alkali, acid, etc., that might damage the surface. Any free standing water will be removed <br />by vacuum or squeegee so the dirt in the water does not reabsorb into the material. <br />After all free standing water is removed, we will apply a thin coat of penetrating type <br />terrazzo polish like the recommended Di Glow P 27 or Aldon Chemical terrazzo polish. <br />After the surface is allowed to air dry, we will polish the surface with a 17" electric floor <br />buffer, removing any haze and burning the polish into the terrazzo. Since there is no <br />accessible electricity, we will use the generators on our power washing trucks to power <br />the floor buffer. <br />Sealing terrazzo in extremely important. Because terrazzo's marble surface is practically <br />non -absorbent, most materials which stain simply do not affect it. However, the cement <br />binder is very porous and absorbs stains easily. This is the portion of the terrazzo surface <br />which requires much care and protection. A penetrating sealer is absorbed by the cement, <br />thus sealing the pores and greatly reducing its absorptive qualities. After cleaning and <br />polish, we will apply a impregnator sealer to protect the surface from spills and stains. <br />Operation Safety and Criteria <br />The Civic Center is a large area that has a great deal of foot and vehicle traffic at any <br />given time during the day or night. Keeping this in mind, it is very important to keep the <br />safety of the public and our cleaning crew a top priority. <br />At the beginning of each cleaning operation, our technician will lay out appropriate <br />signage in strategic areas to inform the public of our presence. This is intended to keep <br />them away from our cleaning operation. If a situation arises where the technician is <br />I <br />