1. Quality assessment of the monitoring database on priority substances
…from current situation to recommendations for the future
A.MORIN, AQUAREF
B.FRIBOURG-BLANC, IOW

2. The approach : assessment of the data at three levels
1.Quality of reporting
-A commonly defined template with 3 categories of fields for quality (cat 1 = mandatory fields)
Geographical information and source of the data (1 or 2)
Sampling date (1), matrix (1), fraction (1), species group and name for biota, sampling method ( 2)
Additional characteristics for water, sediment or biota ( 2)
Result, unit, name and code for the determinand ( ex;, CAS number)
Uncertainty, date of analysis, Lab ID and name, analytical method, LOD (1), LOQ (1), uncertainty at LOQ
Additional quality information : accreditation, blank, extraction recovery , etc…
-A software tool used by most data providers
-A relatively low level of completeness
2. Quality of analyses
3. Quality by substance

3. quality of reporting: the analyses
Uneven water categories distribution
Uneven matrix distribution (mostly on Water)
Uneven temporal distribution

4. Limits of quantification and detection (determination)
Aim of this data collection :
Prioritisation process based on PEC/PNEC
PEC calculation with 2 levels :
PEC 1 : only quantified values
PEC 2 : LoQ/2 when no quantified values
Importance of a common understanding
When LoQ and LoD are reported /
See QA/QC for
Interpretation
Definition
Difficulty to treat the data
< LOQ where 5 % are > LOD and < LOQ

5. Quality by substance: LoQ distribution (Cd)
Summary statistics

6. Quality by substance: LoQ distribution (Cd) Water
In water , dissolved or whole water
MAX/MIN LOQ > 100

7. LoQ distribution (Cd) in sediment

8. LoQ distribution (Cd) in biota

9. quality by substance: Directive 2008/105/EC
performance criteria set in Directive 2009/90/EC: LoQ < 0,3 x EQS
Some substances with many analyses where no LoQ (red)
Some substances with many analyses where to high LoQ (red)
Some substances with significant part already complying

10. Main conclusions
Data collection may be used and data reprocessed for the period from 2005 to (improvement in quality and reporting).
Reprocessing the data with different objectives
Could be used to check and discuss the detection and quantification limits definition and help for QA/ QC implementation
Could be used to highlight the need for improvement of method or inter-lab studies (eg new substances)
Could be used for Substances/matrix and fraction
Else …..
Reporting the data at EEA level : Reporting format
Harmonisation needed : NORMAN and European DB similar format !!

11. Thanks for your attention…