monitoring program to assess impact of personal care ... · aquatic environment by restricting...
TRANSCRIPT
CES-SILICONES EUROPE MONITORING PROGRAMIn January of 2018, the European Union issued a REACH restriction on the use of octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) in wash-off personal care products (PCPs). The goal of the restriction is to reduce the amount of D4 and D5 being released to the aquatic environment by restricting their use in personal care products.
To assess the impact of this REACH restriction, CES-Silicones Europe (CES) began monitoring the amount of D4 and D5 being released to wastewater treatment plants (WWTPs). This monitoring is a surrogate for estimating consumer use of personal care products containing D4 and D5.
PROGRAM DESIGNThe CES Monitoring Program collects samples of the influent wastewater to six representative WWTPs across five European Union (EU) States that receive wastewater primarily from residential sources. The design of the program allows for a rigorous statistical evaluation of D4 and D5 data over time to assess the impact of the restriction.
3 SAMPLING PERIODSThe Program will assess 3 time periods: the period before the restriction was in place, the 2-year phase-out period for personal care products, and the period after the restriction is in place (Jan. 2020).
MONITORING PROGRAM TO ASSESS IMPACT OF PERSONAL CARE PRODUCT RESTRICTIONS FINDS LOW LEVELS OF D4 AND D5
Germany Kläranlage Halle
Poland
Germany Wolfsburg-Brackstedt
Spain
Stalowa Wola Wastewater
Treatment Works
SwedenNorrköping Vatten
och Avfall
Lleida Wastewater Treatment Works
United Kingdom
Bury Wastewater Treatment Works
PRE-RESTRICTION PERIOD RESULTSConcentrations of D4 are already in the range of the predicted post-restriction level at all of the WWTPs. For D5, concentrations are approaching the predicted post-restriction level at all of the WWTPs. These concentra-tions are lower than expected and suggest that the restriction was unnecessary.
Example D4/D5 Sampling Site
Residential Wastewater
Drain
Influent
D4 & D5 Sampling
WWTP
Over 1100 samples of residential wastewater flowing into waste-water treatment plants, during different seasons and at different times of day and days of the week have been analyzed in this period before the restriction.
ECHA predictedpre-restrictionlevel
DE1 DE2 ES1 PL1 SE1 UK1
1.5
1.0
0.5
D4 Concentration1.5
D5
(µg/
l)
D4 Concentration
D4
(µg/
l)
ECHA predictedpost-restrictionlevel
DE1 - Halle an der Salle, Germany DE2 - Wolfsburg-Brackstedt, Germany ES1 - Spain PL1 - Poland SE1 - Sweden UK1 - United Kingdom
DE1 DE2 ES1 PL1 SE1 UK10
10
20
30
40
50D5 Concentration