Development and implementation of a data quality assurance scheme for ambient sulfur dioxide monitoring
Titel:
Development and implementation of a data quality assurance scheme for ambient sulfur dioxide monitoring
Auteur:
Yuen, T. Steven
Verschenen in:
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering
Paginering:
Jaargang 20 (1985) nr. 6 pagina's 645-660
Jaar:
1985-08
Inhoud:
An objective data quality assurance scheme, which can be coded algorithmatically, is developed to validate measurement of ambient sulfur dioxide data. The essential feature of the scheme is a set of data rejection criteria imposed for one minute, three minute, hourly, and twenty-four hour averaged sulfur dioxide concentrations. The scheme also includes (i) correction of any time drifts, (ii) corrections of span and zero drifts, and (iii) conversion of the digital information on sulfur dioxide levels into absolute concentrations. The scheme was incorporated in a data processing software and implemented in a sulfur dioxide monitoring network. The data obtained from the initial four-month monitoring period were reported. It is found that the data quality assurance scheme works well; all suspicious data have been rejected and most of the rejected data are those collected during equipment breakdown periods. This paper describes the development and implementation of a data quality assurance scheme designed for ambient sulfur dioxide (SO2) monitoring. A set of data rejection criteria is proposed. This criteria has been implemented in a SO2 monitoring network. The design and operation of the network, with a complete quality assurance program including equipment calibration, zero/span checks, and data verification are described. The data obtained from a monitoring station are also presented.
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