Health & Environmental Research Online (HERO)


Print Feedback Export to File
1990229 
Journal Article 
Analytical Program for the Risk Assessment of a Closed Herbicide Plant in Germany 
Schlesing, H 
1989 
Yes 
Chemosphere
ISSN: 0045-6535
EISSN: 1879-1298 
NIOSH/00189974 
18 
1-6 
The process used for assessing soil contamination beneath a closed herbicide factory using 2652 samples derived from 196 borings was investigated. Samples were homogenized by manual stirring because correct homogenization techniques could not be performed due to the high volatility of some components. Good conformity for repeated determinations at the beginning of the study resulted in no further repeated determinations. After toluene extraction, total organic halogen (EOX) levels were determined. Chloride presence was determined by turbidimetric methods. Chlorobenzene (108907) values were determined from gas chromatography with electron capture detector (GC). Separation was incomplete between 1,2,3,5-tetrachlorobenzene (634902) and 1,2,4,5-tetrachlorobenzene (95943). Chlorophenol values were determined by GC/ECD analysis of the toluene phase. Separation was incomplete between 2,4-dichlorophenol (120832) and 2,5-dichlorophenol (583788). Polychlorinated dibenzodioxins (PCDD), dibenzofurans (PCDF), and 2,3,7,8-tetrachlorodibenzo-p-dioxin (1746016) values were determined by extraction with the use of labeled tetrachlorodibenzo-p-dioxin. After purification, GC/MS separation was used. In cases of contamination, suspect data were rechecked. Measured and calculated values showed good correlation. Contamination of soil was mainly in layers close to the surface. The author concludes that when specific substances are suspected contaminants, this procedure is an excellent stepwise screening method for soil samples.