Human & Environmental Risk Assessment Environmental Risk Assessment under HERA: Challenges and Solutions Kay Fox Chair of the HERA Environmental Task Force - PowerPoint PPT Presentation

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Human & Environmental Risk Assessment Environmental Risk Assessment under HERA: Challenges and Solutions Kay Fox Chair of the HERA Environmental Task Force. Environment Task Force. C. Poelloth, C. Arregui, J. Backmann - AISE I. Lopez Petresa C. Stevens Dow Corning

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Human & Environmental Risk Assessment Environmental Risk Assessment under HERA: Challenges and Solutions Kay Fox Chair of the HERA Environmental Task Force

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  • Human & Environmental Risk Assessment

  • Environmental Risk Assessment under HERA: Challenges and Solutions

    • Kay Fox

    • Chair of the HERA Environmental Task Force

HERA at XXXI CED Kay Fox


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Environment Task Force

C. Poelloth, C. Arregui, J. Backmann - AISE

I. Lopez Petresa C. Stevens Dow Corning

G. Boeije P&G R. van Egmond Unilever

H. Certa SASOL R. van Wijk Akzo Nobel

R. Elsmore McBride T. Wind Henkel

K. Fox Unilever A. AartsSolutia

P. Masscheleyn P&G A. Berends Solvay

P. Richner CIBA D. Calcinai Condea Augusta

W. Schul BASF E. Cerbelaud Rhodia

J. Steber Henkel V. Koch ClariantR. Toy Shell Chemicals

HERA at XXXI CED Kay Fox


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Intended for application

in EUROPE

HERA Environmental Risk Assessment

based on Technical Guidance Document

for New and Existing substances

EUSES

HERA at XXXI CED Kay Fox


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Focus on chemical substances used primarily in

Household detergent and cleaning products

Domestic Emission

On-Site

Treatment

Sewer Transport

Primary Focus on

the use and disposal

of these substances

Sewage Treatment

River

HERA at XXXI CED Kay Fox


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Detergent exposure scenario for EUSES

TGD

  • Begin with EUSES

    • Environment

      • Local

      • Regional

    • Predators exposed via the environment

    • Man exposed via the environment

HERA at XXXI CED Kay Fox


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Detergent exposure scenario for EUSES

HERA

HERA

Effectively in HERA

HERA

  • Wide dispersive use, Detergents (5, 9)

  • 100% of chemical to sewer (Local Use model)

HERA at XXXI CED Kay Fox


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Detergent exposure scenario for EUSES

Contributions to Regional Environment from Local sources

TGD Default HERA

Production

0.3%0.3%(1.003)0 0

0.8% 0.8%0 0

max max

Formulation

Use

99%99%100%100%

Bottom line - 100%, within volume determination error

HERA at XXXI CED Kay Fox


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Detergent exposure scenario for EUSES

  • To cover a “reasonable worst case”, TGD and EUSES assume that

    • the local wastewater treatment plant receives 4 times the average ingredient input

    • the Standard EU region receives 10% of the total European product consumption

  • HERA replaces these default assumptions with HERA default values based on measured product consumption and environmental monitoring data - the HERA Detergent Scenario.

HERA at XXXI CED Kay Fox


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Detergent exposure scenario for EUSES

  • Tiered Methodology

    • Begin with the HERA Detergent scenario

    • Accept all other EUSES Defaults

    • Replace selected defaults if necessary

      • Removal values in STP

      • Measured Kd values

      • Biodegradation rates in rivers, soil, etc.

      • Often need Chronic ecotoxicity data

HERA at XXXI CED Kay Fox


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Regional Environmental Concentration

Standard EU Region

20 million people

10% of EU Production

Production

200 km

Formulation

200 km

Use

Release is based on Production Volume

HERA at XXXI CED Kay Fox


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STD. EU

Region

Local treatment plants

Input to local treatment plant is based on the regional production volume.

HERA at XXXI CED Kay Fox


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Detergent Release scenario

HERA Region

Release is based on

population density

Production

200 km

Formulation

200 km

Use

~100% of release

Kg/person/year

HERA at XXXI CED Kay Fox


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The standard EU region has 10% of the EU

detergent consumption - for 5.4% of the EU

population.

HERA at XXXI CED Kay Fox


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Detergent consumption per person in eighteen European countries

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  • The maximum regional release for detergent ingredients is found in the UK region containing London

  • This is 5.5% of total usage, rather than 10%, as in the TGD

  • Thus the HERA Detergent release scenario should have 5.5% of the total volume released to the region.

HERA at XXXI CED Kay Fox


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In EUSES,

STD. EU

Region

Local treatment plants

Input to local treatment plant is based on the regional use volume.

HERA at XXXI CED Kay Fox


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Regional detergent Scenario

  • HERA must give the correct local loading for sewage treatment plants in countries with highest detergent use.

  • Italy and Spain have 1.25 times the average EU detergent consumption, per person.

  • HERA ensures correct representation of the LOCAL treatment plant, which EUSES derives from the regional consumption, by raising the overall regional background to.055 X 1.25 = 0.07 times the European use volume

HERA uses 7%, not 10%, for regional input

EUSES

HERA at XXXI CED Kay Fox


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  • Product use and substance use data are expected to be similar, for most widely used detergent ingredients.

  • Each HERA Substance team will consider any areas of high regional usage for their substance, and will modify the HERA regional default if appropriate.

Fragrance F

HERA at XXXI CED Kay Fox


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STD. EU

Region

Local treatment plants

Release from LOCAL Sewage Treatment facility

A reasonable worst case treatment plant

receives 4 times the

average load

TGD - Local plant

4

HERA at XXXI CED Kay Fox


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GREAT-ER

GIS model which predicts chemical concentrations of household chemicals in rivers.

UK data

Boron used as a

conservative tracer,

to validate the model.

6 STP influents and effluents

Monthly river water and effluent samples

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  • Measured effluent boron agreed with load calculated from consumer sales volumes (1996, 28 daily composite samples from 6 treatment plants) 0.22 g/person/day

  • Boron in effluents: 50 treatment plants

    • NL 7

    • Germany 6

    • Italy 3

    • UK 34 plants

HERA at XXXI CED Kay Fox


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UK Boron data from 804 grab samples from 34 plants.

Measured to calculated boron :

Mean = 1.04

90%ile < 1.5

Reasonable worst case (90%ile) is 1.5 times the regional

average input, not 4 times as in the TGD default scenario.

HERA at XXXI CED Kay Fox


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  • Boron concentrations in Italy, Germany, and the Netherlands also agreed with the concentrations calculated for the country and year of emission, with the 90%ile of the measured to calculated boron distribution being less than 1.5.

  • Thus data from 50 sewage plants, in 4 countries, show that for detergent ingredients in wide general use, such as perborate, a reasonable worst case (90%ile) is 1.5 times the regional average input.

  • Paper on the 1.5 factor submitted to Chemosphere. ECETOC submission to TGD revision resulted in change to “up to a factor of 4” in the revised TGD.

HERA at XXXI CED Kay Fox


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  • Each HERA Substance team will consider any areas of high local usage for their substance, and will modify the HERA default for the reasonable worst case sewage treatment plant if appropriate.

HERA at XXXI CED Kay Fox


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Summary - HERA Defaults

Detergent scenario

STD. EU

Region

100%, not 99%, of ingredient used

goes to the local treatment facility

Region -

7%, not 10%

of ingredient

used

Local sewage

treatment - 1.5

is worst case, not 4.

1.5

HERA at XXXI CED Kay Fox


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Modified Exposure Scenario - HERA

TGD - Worst case (4) (Local STW)

times worst case (~2) (10% production tonnage)

gives almost 8 times the average ingredient loading to a local sewage treatment plant.

HERA Detergent Scenario -

Data backed “worst case” (1.5) for local STW

times “worst case” (~1.7) regional release based upon product use

shows two times the average ingredient loading to a local sewage treatment plant.

HERA will check that the substance use patterns are suitable before using the HERA defaults.

HERA at XXXI CED Kay Fox


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Thanks!

  • To HERA for providing the Challenges!

  • To the HERA Environment task force for help with the Solutions

  • To ERASM and the Environment Agency for England and Wales for funding the boron monitoring work

  • To the EA and Yorkshire Water employees who collected the samples in all weathers!

  • To you for listening!

HERA at XXXI CED Kay Fox


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