Registration Dossier

Administrative data

Endpoint:
mode of degradation in actual use
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Modeled using estimation program recommended in REACH Guidance

Data source

Reference
Reference Type:
other: software program
Title:
Estimations Programs Interface for Windows, EPIwin v3.20
Author:
anonymous
Year:
2007
Bibliographic source:
U.S Environmental Protection Agency, Washington, DC

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Estimated using EPIwin v3.20. Modeling based on chemical structure.
GLP compliance:
no
Type of study / information:
STP Fugacity Model: Predicted Fate in a Wastewater Treatment Facility

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Any other information on results incl. tables

STP Overall Chemical Mass Balance:

Compartment                    Perrcent ( %)

Influent                                   100

Primary sludge                      59.89

Waste sludge                      33.36

Primary volatilization               0.00

Settling volatilization               0.00

Aeration off gas                       0.00

Primary biodegradation         0.18

Settling biodegradation          0.04

Aeration biodegradation        0.56

Final water effluent                   5.96

Total removal                           94.04

Total biodegradation                0.78

Applicant's summary and conclusion

Conclusions:
Removal of DecaBDE from the influent by sewage treatment plants is expected to be highly efficient. Approximately 94% of that entering the plant will be removed via settling to sludge. No volatilization is expected. Essentially no (0.78%) biodegration is expected. These estimates are consistent with DecaBDE's properties, e.g. negligible water solubility and vapor pressure, extensive binding to particulates and organic carbon, and resistance to microbial attack and hydrolysis. The estimate is also consistent with the lack of biodegration seen in a ready biodegradation study.
Executive summary:

Removal of DecaBDE from the influent by sewage treatment plants is expected to be highly efficient. Approximately 94% of that entering the plant will be removed via settling to sludge. No volatilization is expected. Essentially no (0.78%) biodegration is expected. These estimates are consistent with DecaBDE's properties, e.g. negligible water solubility and vapor pressure, extensive binding to particulates and organic carbon, and resistance to microbial attack and hydrolysis. The estimate is also consistent with the lack of biodegration seen in a ready biodegradation study.

STP Overall Chemical Mass Balance:

Compartment                    Perrcent ( %)

Influent                                   100

Primary sludge                      59.89

Waste sludge                      33.36

Primary volatilization              0.00

Settling volatilization              0.00

Aeration off gas                       0.00

Primary biodegradation         0.18

Settling biodegradation          0.04

Aeration biodegradation         0.56

Final water effluent                   5.96

Total removal                           94.04

Total biodegradation                0.78