Fig. 8From: Chemical surveillance in freshwaters: small sample sizes underestimate true pollutant loads and fail to detect environmental quality standard exceedancesFalse negatives for AA-EQS exceedance of 2007 DEHP, fluoranthene and 4-tert-octylphenol. False negatives are defined as the proportion of simulated sub-sample means below or equal to the annual average environmental quality standards (AA-EQS)Back to article page