Regulation 6 Calculation of mean valuesI1
Northern Ireland
The Department shall ensure that—
subject to paragraph (c), where the amounts of physico-chemical or chemical measurands in a given sample are below the limit of quantification, the measurement results shall be set to half of the value of the limit of quantification concerned for the calculation of mean values;
where a calculated mean value of the measurement results referred to in paragraph (a) is below the limits of quantification, the value shall be referred to as ‘less than limit of quantification’; and
where measurands are total sums of a given group of physico-chemical parameters or chemical measurands, including their relevant metabolites, degradation and reaction products, results below the limit of quantification of the individual substances shall be set to zero.