7. Establish quality assurance and quality control systems
Air quality monitoring must satisfy certain minimum quality requirements and standards. Measurements, regardless of where and by whom they are carried out, must be comparable to those conducted elsewhere.
This is secured through a comprehensive Quality Assurance and Quality Control programme (QA/QC). QA/QC may be regarded as a chain of activities designed to deliver credible and accurate data. NILU delivers written procedures and routines for the quality control of the operation and maintenance of instruments and
NILU also provides training of key personnel in operation, calibration and maintenance as well as undertake audits of the systems when required. The procedures developed to handle ambient air quality measurements contain several levels of controls.
In field operations will be established:
Station Manuals including Standard Operational Procedures (SOP) for instrument installations, maintenance, controls etc.,
Zero span checks and calibration routines.
At the Monitoring Laboratory data are controlled following quality assurance routines
as described i.e. in ISO 45001 from the International Standardisation
At daily retrieval using the AirQUIS system,
Through simple statistical and graphical evaluations to check validity and representativeness of data,
As part of the reporting of data.
The quality control procedures give the data credibility. The data become reliable, which is essential when using the data for reporting, controls and planning. To be used with confidence for scientific and environmental management purposes the data must also be comparable and compatible.