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Second Global Round Table on PRTRs, Madrid. Verification of Data Quality within the PRTR Process Chain in Germany. Ulrike Schüler German Environment Agency Unit II 2.2 – Discharges and Inputs to Surface Waters. Verification of Data Quality within the PRTR Process Chain in Germany. Index.
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Second Global Round Table on PRTRs, Madrid Verification of Data Quality within the PRTR Process Chain in Germany • Ulrike Schüler • German Environment Agency • Unit II 2.2 – Discharges and Inputs to Surface Waters
Verification of Data Quality within the PRTR Process Chain in Germany Index 1 Legal background 2 PRTR Process Chain in Germany 3 QA levels 4 Conclusion Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 1 Legal backgroundfor QA/ QC E-PRTR regulationand German act on PRTR bothoperatorandcompetentauthoritiesresponsible at different stagesfordataassurance at operatorlevel: completeness, coherence, reliability at authoritylevel: checks via comparisonwithotherdata (datasubmittedtoauthorities on different reportingobligations, licencedata, datafrompreviousyears etc.) act:not definedhowdatacheckshavetobedone Second Global Round Table on PRTRs, Madrid
Data flow Competent Authority operator UBA Verification of Data Quality within the PRTR Process Chain in Germany 2 PRTR process chain in Germany Industrial facility PRTR report Federal States quality assurance confidentiality EPA quality assurance register EU quality assurance register EEA / COM RY + 16 months Rep.Year (RY) RY + 5 months RY + 12 months RY + 15 months Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 2 PRTR process chain in detail Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 3 QA levels • formal correctness • syntactic correctness – xml schema • semanticcorrectness – additional tools • ex. NACE vs. activities • ex. release vs. accidentialrelease • scientific/ technicalplausibility – externaltools • outlier problems (comparison, time series) • causal connections Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 3 QA levels Concept of Bube tests • integrated in business logic of BUBE (Java application) • covers all BUBE modules (PRTR + LCP + emission declaration) • 2 test stages at operator level • direct support via UI where possible (lists, data types) • complete test prior to submission of data to competent authority • flexible configuration (stored in db) • error level configuration error / warning • configurations possible at level of federal state – different levels of strictness – different levels data quality Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 3 QA levels Selected emission factors (EF) in BUBE since 2014*/ 2015 for UWWTP important: - averagefor all German UWWTP, providebasisforqualitychecks (warning) - threshold Annex I E-PRTR: 100.000 pop. equiv. Work on futureinclusionof: Atrazine, Benzo(b)fluoranthene, Benzo(g,h,i)perylene, Fluoranthene, Nonylphenol, Octylphenols, Pentachlorophenol, Simazine, Tributyltin, Trichloromethane Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 3 QA levels QA at German PRTR database • 2 qualityassurancestages • directlycheckingxml-files • additional checksandtransformationsduringinputintodatabase • transfertopresentationmodule (www.Thru.de) • conversionto EU-xmlfile Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 3 QA levels Test suite for xml-transfer format • providing quick responseto Federal States • in-housedevelopment • written in scriptinglanguage (TCL) • based on softwaretesttools (tcltest) • an error – a missingtest • XPathselection on DOM-tree • flexible and quick additionoftests • completetest ~ 25 LOC, ~ 15 nearlyunchanging • possiblecombinationwithotherdatapools (UWWTD, LCP) forplausibilitychecks Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 3 QA levels - Test suiteforxml-transfer format Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 3 QA levels Test results • pdfdocument • errors • warnings • expectedemissionsmissing • confidentiality • potential outliers Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 3 QA level Outliertests – Hg + Ni PRTR datais not normallydistributed, not easy to check for potential outliers, missingreleases… data on facilitysize/ gross power not mandatory in E-PRTR + German PRTR LCP power plant >50 MW same as PRTR 1.c (thermal power stations + combust. Installations >50 MW) assumption: someparametersverycloselyrelatedtosizeof a plant (gross power) – CO2 (R=0.92) relationHg/CO2 nicely linear, esp. forlignite, but toofewfacilities onlyusedforhardcoal indicatorforHgreleases >0.04 kg Hg/1.000 t CO2 – possiblestatisticaloutlier >400 kt CO2/a Hgreleaseshouldbereported Ni - similarmethodusedfor UWWTP – sizeof plant and TOC (R=0.82) relationNi/TOC usedasindicator: >0.001 Ni/TOC Niis potential outlier >55 t TOC Nishouldbereported bothrelationsestablished in BUBE to check on both potential outliersandmissingreleases at EU level: researchof ETC on crosspollutantrelations: 174 relationsbetweenpollutantsestablished on releasestoair, not yetinstalled at EEA QA validationtool Second Global Round Table on PRTRs, Madrid
Verification of Data Quality within the PRTR Process Chain in Germany 4 Conclusions and recommendations Experiences • fixedcontentsrequired at beginningofreportingperiod • check asearlyaspossible in theprocesschain • earlystrictnessisimportant – bottle neck at thebeginning, not at the end • use flexible and easy-to-expandtoolsalongthechain • use different toolsfor different tasks – bepragmaticand flexible • corrections must beintegrated in thebasedataset (feedbackchannel) Second Global Round Table on PRTRs, Madrid
Thank you! • Ulrike Schüler • ulrike.schueler@uba.de • German Environment Agency - www.uba.de • German PRTR - www.thru.de / Hier steht der Veranstaltungstitel in 12 Punkt