Registration Dossier

Administrative data

Endpoint:
distribution modelling
Type of information:
other: Modelling of environment
Adequacy of study:
other information
Study period:
2006
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data from peer-reviewed handbook or collection of data

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
2006

Materials and methods

Model:
other: Soil, groundwater and surface waters were modelled.
Calculation programme:
Several progammes used
Media:
water - soil

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Type:
Constituent

Results and discussion

Any other information on results incl. tables

Ratio between MTT-groundwater and background levels for deep groundwater according Crommentuijn (1997), and measured background levels in deep groundwater according Fraters (2001). MTT is lower than background levels

Component

Background level groundwater

(Cbdeep µg/l)

(Crommentuijn 1997)

Background level deep groundwater

(ACdeep µg/l)

(Fraters 2001)

MTTgw/Cbdeep

(Crommentuijn 1997)

MTTgw/ACdeep

(Fraters 2001)

Sb

0.09

0.16

69

39

As

7.0

5.4

3.4

4.4

Ba

200

160/990

0.15

0.18/0.031

Cd

0.06

0.05

5.7

6.8

Cr(III)

2.4

3.2

3.6

2.7

Co

0.6

0.7

5.0

4.3

Cu

1.3

<0.63

0.85

>1.8

Hg

-

0.05

-

4.6

Pb

-

1.3

6.9

8.5

Mo

0.7

1.6

41

18

Ni

2.1

8.8

0.90

0.22/21

Se

0.02

0.06

265

88

Sn

<2

<2

>10

>10

V

1.2

2.7

2.9

1.3

Zn

24

26

0.3

0.3

1resp. sand, clay, peat

MTT = estimated additional toxic burden

Applicant's summary and conclusion

Conclusions:
Scientific assessment descibes the condition for use of slags in the environment.
Executive summary:

Proposals are made for Revision of the Building Materials Decree in the Netherlands (1999). Emission values were proposed for environmental politics to balance environmental protection with other socio-economic concerns.

Emission limit values for inorganic materials depend on the environmental compartment, the required protection, and the use pattern of the building material.

Soil, groundwater and surface waters were modelled. Soil modelling took into account e.g. time-dependent exposure of the soil to leachate, vertical transport through the soil profile and retardation of leachates in the soil profile. Surface water modelling took into account dilution assuming certain mixing zones, dependent on the size of the surface waters.

For proposing permitted emission levels, two alternatives were presented: a stand-still approach (based on quality target values) and a risk-based approach (based on PNECs). Both models were evaluated and proposals for leaching limit values of building materials were made on the basis of the foreseen use. Slags can be used as construction material in the environment provided that preconditions are fulfilled e.g. a certain ratio of water volume to slag weight is ensured.