Objective A method to identify heavy metal outliers in soil of site environmental investigation was studied.Methods First,the normal distribution test of soil heavy metal samples was carried out,then the heavy metal outliers were identified by the PauTa criterion,and the frequency histogram was used to verify the outliers identification results.Results The results of the case study show that the PauTa criterion can effectively identify the outliers of heavy metal content in the soil of the site environmental investigation.Conclusion The use of PauTa criterion to identify the outliers of heavy metal content in soil of site environmental investigation is helpful to identify the soil that is lower than the screening value but greatly affected by human production and life,and can greatly reduce the risk of soil cumulative pollution.
PauTa criterionnormal distributionfrequency histogramheavy metal in soiloutliers
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