Procedure Z: Quality assurance requirements for X-ray-fluorescence based multi-metals continuous emission monitoring systems at stationary sources case study

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Procedure Z outlines the continuing quality control and quality assurance requirements for an x-ray fluorescence based multi-metal CEMS. Procedure Z requires daily checks of the upscale, zero and volume measurement drift. It also specifies quarterly checks of the x-ray fluorescence calibration and of the volume measurement calibration. Finally procedure Z requires that the entire XRF multi metal CEMS accuracy be verified on an annual basis.

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