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the possibilities of adjacent surface damage. Plastic sheeting and tape are in every trick and will <br />be used when necessary. <br />Extreme care and diligence is always utilized when using airless sprayers and graffiti removers <br />to avoid overspray of cars, personal property, and pedestrians. During the past 18 years GPC <br />personnel have removed millions of tags with not one claim of overspray, injury, or any other <br />complication for any of our clients. <br />Method Determination- Unpainted Surfaces <br />Professional graffiti removal on unpainted surfaces calls for complete graffiti removal with <br />minimal or no damage to the underlying surface. Since surfaces and types of "tags" vary, it is <br />vital for the graffiti removal professional to have an array of products and equipment to best <br />eradicate the graffiti. <br />GPC techs follow a process utilizing various methods and products. First, the tech will attempt <br />to remove the graffiti with simply hot water (184 degrees). This straightforward "steam <br />cleaning" method removes many types of graffiti from various surfaces with absolutely no <br />damage to the underlying surface. This method also preps the surface for GPC's variety of <br />environmentally friendly biodegradable removal products. Graffiti removers are designed for <br />different surfaces (porous, non - porous, and delicate). Upon completion of the graffiti remover <br />treatment, 95% of all tags will have been removed. Once again no damage will have been <br />caused to the underlying surface. For the remaining 5% of tags that do not completely respond to <br />this process, baking soda blasting is used. Baking soda is the most abrasive method besides silica <br />sand, however our techs will utilize their skills to limit surface damage. <br />Specific Methods <br />- Unpainted Slump Stone <br />Slump stone is one of the softest stones. Tech will obtain permission from property owner to <br />complete the work. First, washing the graffiti with hot water starts the graffiti removal process. <br />Next, any remaining graffiti gets a thin coat of graffiti remover designed for non -porous stone. <br />The graffiti is rinsed again with hot water. If any graffiti remains, a second application of graffiti <br />remover will be applied. These processes will not cause any damage to the slump stone. If any <br />graffiti or shadows still remain, then GPC will use baking soda wet blasting. All water used will <br />be recovered using GPO's water recovery equipment. <br />GPC always cleans the entire slump stone block, not just the area affected by graffiti. Cleaned <br />areas are "blended" in a manner similar to "feathering" in painting. <br />The Graffin Wash process discussed in the following "ConcretelSidewalk" section can also be <br />used once the cleaning is complete. <br />-Steel Light Pole <br />Metal poles will be painted from 6 ft in height and down and all around. After the pole has been <br />painted, spot treatment can be used to abate graffiti. GPC will use City approved colors. <br />