Registration Dossier

Environmental fate & pathways

Monitoring data

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Administrative data

Endpoint:
monitoring data
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1981-1992
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study well documented. Study meets generally accepted scientific principles. Study acceptable for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1992

Materials and methods

Principles of method if other than guideline:
pH measurements in the Wesel-Datteln canal in context with the use of slags as hydraulic engineering material
GLP compliance:
no
Type of measurement:
other: field study
Media:
surface water

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Details on test material:
slags in form and size of stones (40-160 mm), filter material (32-100 mm), pebbles (45-65 mm)

Study design

Details on sampling:
map of sampling and construction sites supplied in the study

Results and discussion

Concentrationopen allclose all
Country:
Germany
Location:
Wesel-Datteln-Kanal
Substance or metabolite:
other: pH before construction of channel embarkment
Conc.:
7.8 - 8.4 other: pH
Country:
Germany
Location:
Wesel-Datteln-Kanal
Substance or metabolite:
other: pH at reference site during construction of channel embarkment
Conc.:
8.1 - 8.3 other: pH
Country:
Germany
Location:
Wesel-Datteln-Kanal
Substance or metabolite:
other: pH on-site during construction of channel embarkment
Conc.:
>= 8.5 other: pH
Remarks on result:
other: L/S was 16.7 (embarkment on slopes) and 44.4 for filter layer
Details on results:
The small increase in pH is unlikely to have any effect on the environment.

Any other information on results incl. tables

In regard to the cover layer, the L/S (liquid/solid) is 16.7 L/kg, in regard to the filter layer the L/S is 44.4 L/kg. According to the Landesumweltamt Nordrhein-Westfalen (Environmental Agency of the German Federal State of Northrhine-Westphalia, Merkblaetter Nr. 7, Anforderungen an die Verwendung von Stahlwerksschlacken im Wasserbau, Essen 1996)

Applicant's summary and conclusion

Conclusions:
pH increase during construction of channel embarkment is not relevant for the environment
Executive summary:

5 slags, steelmaking, converter (BOS) were used as a construction material in hydraulic engineering for channel embarkment. As slags have high pH values when leached under laboratory conditions, the pH was monitored before, during and after the construction works. Although the L/S (liquid/solid) was as low as 16.7, the

pH of the channel water was 7.8 - 8.4 before the construction works, 8.1 - 8.3 in reference site during construction werks, and temporarily up to 8.5 during construction works on-site.