Health risk assessment of environmental pollutants. Toxicological reference data and their evaluation. 9. supplement; Gefaehrdungsabschaetzung von Umweltschadstoffen. Ergaenzbares Handbuch toxikologischer Basisdaten und ihrer Bewertung. 9. Ergaenzungslieferung

The 9th supplement contains assessments of tolerable resorbed doses (TRD values) of chloroform, chlorobenzene and 1,2,4-trichlorobenzene as well as reassessed values for tetrachloroethene (PER, No. D 892) and toluene (No. D 916). This supplement also contains recommendations by the Commission on Room Air Hygiene for assessment of carbon monoxide. (orig.)