SCHEDULE 8Data quality objectives
PART 2Group B pollutants, polycyclic aromatic hydrocarbons and total gaseous mercury
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The data quality objectives set out in the following table are provided to guide quality assurance—
Benzo(a)pyrene | Arsenic, cadmium and nickel | Polycyclic aromatic hydrocarbons and total gaseous mercury | Total deposition | |
|---|---|---|---|---|
Uncertainty | ||||
Fixed and indicative measurements | 50% | 40% | 50% | 70% |
Modelling | 60% | 60% | 60% | 60% |
Minimum data capture | 90% | 90% | 90% | 90% |
Minimum time coverage | ||||
Fixed measurements | 33% | 50% | ||
Indicative measurements(1) | 14% | 14% | 14% | 33% |
(1) Indicative measurement being measurements which are performed at reduced regularity but fulfil the other data quality objectives. | ||||