“…Arsenic is a toxic metalloid element which is an acute and chronic intracellular poison for humans [Schiller e t al, 1977;Brown et al, 19761. Acute arsenic exposure causes a variety of nonspecific complaints in low doses and, in higher doses, leads to nausea, vomiting, and death [Buchanan, 19621. Chronic exposure leads to weight loss, skin abnormalities including pigment changes, keratoses and folliculitis [Birmingham et al, 1965;Perry et al, 19481, conjunctival and respiratory irritation, nasal septa1 perforation [Buchanan, 19621, impairment of hematopoiesis Kyle and Pease, 19651, and sensory peripheral neuropathy [Heyman et al, 1956;Landau et al, 19771. Chronic arsenic exposure has also been linked with cancer of the skin [Hill and Faning, 1948;Tseng et all, lung [Milham and Strong, 1974;Ott et al, 19741, liver [Lander et al, 1975;Roth, 19571, and possibly lymphatic tissue [Ott et al, 19741. Salts of arsenic are widely used as wood preservatives, but the health hazards of arsenic exposure for workers exposed occupationally to treated wood have not been defined.…”