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1 • ing a clean, impermeable glove, remove a 15 cm <br /> �f541 filter paper. It will be necessary to change <br /> the glove is it touches the surface being wiped <br /> and a new glove should be used for each sample to <br /> avoid cross contamination. <br /> 2 . Moisten the filter with a collection medium <br /> selected to dissolve the contaminants of concern. <br /> Typically, the reagent used in the analytical <br /> sample preparation is the media for moistening the <br /> filter . <br /> 3 . Thoroughly wipe approximately 1 m2 of the area <br /> With the moistened filter . Use a 1 m2 stencil to <br /> Judge the size of the wipe area. If a different <br /> size area is wiped, record the change in the field <br /> logbook . <br /> 4 . If the six-face is not flat, be sure to wipe any <br /> crevices or depre•zsions . <br />