Improving Quality AssuranceQuality Control And Data Management in

Improving Quality Assurance/Quality Control And Data Management in Lithuania JUOZAS MOLIS Head of Automatic Measurement Systems Department 2021 -06 -07 Geneva, 11 June 2007 Environmental Protection Agency http: //aaa. am. lt

Introduction The aims and objectives of the Lithuanian automatic air quality monitoring network data are: • Meeting national requirements, in particular EU Directives • Providing necessary information on air quality for the public, decision makers and scientific community • Identifying long term trends on air pollutant concentrations • Assessment of policy effectiveness 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

NRL main tasks • Administration and maintenance of the quality system (preparation SOPs and quality documents) • Maintaining the national reference standards • Instrument selection, method validation, data validation and training • Audits in the network • Maintaining the central database 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Quality handbook I part. Description of the quality system (Quality assurance): • References to national and EU legislation and Directives • Quality organization, tasks and responsibilities • Criteria for NRL, calibration laboratory and network operators • Data quality objectives and measurement uncertainties • Definition of zone and agglomerations 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Quality handbook II part. Description of network operation (Quality control): • Network operator manuals • Standard operations procedures (SOPs) • Instrument performance acceptance criteria • Description of traceability and calibrations • Document handling and upgrading control 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Data quality assurance Criteria for network establishment Standardised reference and selection of methods sampling or points measurement • Station siting (ID 1 VI and VII annexes); equivalent methods (ID 1 IX • Instrument selection annexes) • Instrument service and repair • Network design • Operation manuals • Operator training • Instrument calibration • Site audit • Intercalibration 2021 -06 -07 National assessment laboratory (FD 3 article); Environmental Protection Agency http: //aaa. am. lt

Calibration In the national network and in the majority of local networks a 3 -stage approach to calibration is adopted: • daily span and zero check with the analysers internal gas source (permeation tube or gas cylinder) • 4 -weekly manual calibration with certified calibration gas cylinder • 6 -monthly site audit check with an independent gas standard to check the calibration of the analyser and the stability of the on-site gas cylinder 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Calibration gas and operator audit carried out at 6 monthly intervals the following checks are undertaken: • linearity • noise • response time • leaks and flow check • converter efficiency • analyser calibration 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Calibration The requirements for analysers to be dynamically calibrated at site are as follows: • when analyser is initially installed • if any repair is done on the analyser • if tolerances of zero/span checks are not met • if analyser is relocated 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Quality control checking, accepting, rejectingand or adjusting • Information management by software manual the data, on the basis operation by expert • Data ratification of all available final decisions on • Quality circle review and feedback information data acceptance or rejection Quality control activities include: 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Data management Tasks of national air-quality assessment and management system: • Collection of all available air-quality data • Collection of all available emission data • Collection of supporting data (meteorological, traffic) • Data verification (quality control) • Modeling of concentration fields of pollutants • Assessment and modeling of trends in air quality • Data reporting (national and international). 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Air quality data for the year 2006 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Conclusions • • • QA/QC procedures has been successfully incorporated into operation of the Lithuanian national automatic air-quality monitoring network The data are the high quality and fulfil the aims and objectives of the network Qualified personnel is the basement for data quality 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt

Thank you for your attention 2021 -06 -07 Environmental Protection Agency http: //aaa. am. lt