e recently restricted use of the fumigant ethylene dibromide (EDB).55 Chronic toxicology studies of methyl bromide are currently being conducted,37 and NIOSH recommends that the results of these studies be thoroughly evaluated before significantly expanding the use of methyl bromide.
Guidelines recommended in the Appendix for minimizing worker exposure to these monohalomethanes are general in nature and should be adapted to specific work situations as required.
*"'Potential occupational carcinogen' means any substance, or combination or mixture of substances, which causes an increased incidence of benign and/or malignant neoplasms, or a substantial decrease in the latency period between exposure and onset of neoplasms in humans or in one or more experimental mammalian species as the result of any oral, respiratory or dermal exposure, or any other exposure which results in the induction of tumors at a site other than the site of administration. This definition also includes any substance which is metabolized into one or more potential occupational carcinogens by mammals" (29 CRF 1990.103). [return to text]
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