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  3. Lead & Metals/Chemistry/Industrial Hygiene

A customer needs to reach an RL of 200 ug/ft2 and 40 ug/ft2 and wants to verify the recommended or minimum sampling areas.

The current FLAA RL is 10 micrograms per sq. ft. based upon a 144 sq. in. wipe area.  The RL goes up proportionately as the area goes down.  For example, an RL of 40 micrograms per sq. ft. could be achieved with a 36 sq. in. wipe area.