Appendix D - Dossier (PDF) - Tera

date: 20–JUL–2005
3. Environmental Fate and Pathways Substance ID: 71–43–2
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steel flow–through system with three different aquifer
materials described as follows:
coarse sand 84% 90% 63%
fine sand 15% 8% 34%
silt 0% 0% 2%
clay 1% 2% 1%
organic matter 0.007% 0.025% 0.015%
The test substance was applied to the test columns after
solution in groundwater from a Danish drinking water plant
at an average influent concentration of 39 ug/l. Effluent
concentrations were measured gaschromatographically.
Evaporative losses were avoided by saturating the gas phase
with test substance vapour. The temperature was 10 degree C.
Test substance: commercial product (analytical grade, purity not given)
Reliability: (2) valid with restrictions
Flag: Risk Assessment
16–MAR–2004 (664)
Type: adsorption
Media: water – soil
Method: other: determination of distribution coefficients in a batch
system
Year: 1992
Result: The distribution coefficients Kd for benzene measured at 20
different Danish aquifer materials were between 0.04 and
0.23 ml/g dependent on the content of organic matter. By
dividing through the organic matter content of the aquifer
material Koc values in a range between about 100 and 900
were calculated.
Source: Deutsche Shell Chemie GmbH Eschborn
German Rapporteur
Test condition: 14C–labelled benzene in concentrations of 100, 200 and 400
ug/l solved in groundwater from a Danish drinking water
plant was applied to 20 different Danish aquifer materials
in capped tubes. The samples were equilibrated for 96 h at
room temperature and the water phase then analysed by
scintillation counting. Aquifer material characteristics:
2–94% coarse sand, 3–94% fine sand, 0–4% silt, 0–4% clay,
0.006–0.213% organic matter.
Test substance: commercial product (purity not given)
Reliability: (2) valid with restrictions
Flag: Risk Assessment
16–MAR–2004 (665)
Type: volatility
Media: soil – air
Method: other
Remark: The half–lives of volatilization, without water evaporation,
of benzene uniformly distributed at a rate of 1 kg/ha to 1
and 10 cm in soil with an organic carbon content of 1.25%
were 7.2 and 38.4 days respectively.
Source: BP Chemicals Ltd LONDON
German Rapporteur
Reliability: (4) not assignable
16–MAR–2004 (530) (589)
Appendix D: Benzene SIDS Dossier
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