If a driver's hands become contaminated with a water-soluble radioactive isotope, what is the correct initial personal decontamination procedure?

1. Scrub skin with a wire brush until bleeding occurs
2. Wash hands thoroughly with mild soap and tepid water, rinsing frequently, without scrubbing hard enough to break or abrade the skin
3. Soak hands in concentrated nitric acid
4. Wipe hands on driver seat fabric