Toxicological Evaluation and Limit Values for Nonylphenol, Nonylphenol Ethoxylates, Tricresyl, Phosphates and Benzoic Acid 9. Quality criteria9. C-value 9.1 Quality criteria in soil NP A limit value of 25 mg/kg has been calculated based on children’s ingestion of soil. A quality criterion of 25 mg/kg soil is proposed. Quality criteria Quality criterion: 25 mg/kg soil NPE A limit value of 65 mg/kg has been calculated based on children’s ingestion of soil. A quality criterion of 65 mg/kg soil is proposed. Quality criteria Quality criterion: 65 mg/kg soil 9.2 Quality criteria in drinking water The existing limit value for phenols in drinking water of 0.5 mg/l offers adequate protection against adverse health effects induced by NP or NPE. Quality criteria Quality criterion: 0.5 mg/l. 9.3 C-value NP A limit value of 0.017 mg/m3 has been calculated based on toxicological considerations in relation to repeated oral exposure. For substances having acute or subchronic effects, but for which activity over a certain period of time is necessary before the harmful effect occurs, the C-value is set at the limit value. A C-value of 0.02 mg/m3 and placing in Main Group 1 is proposed. Main Group 1 is justified because of concern for the environment due to the persistence of NP. This proposed C-value also protects against sensory irritation caused by NP. C-value 0.02 mg/m3, Main Group 1. NPE A limit value of 0.05 mg/m3 have been calculated based on toxicological considerations in relation to repeated oral exposure. For substances having acute or subchronic effects, but for which activity over a certain period of time is necessary before the harmful effect occurs, the C-value is set at the limit value. A C-value of 0.05 mg/m3 and placing in Main Group 1 is proposed. Main Group 1 is justified because of concern for the environment due to the persistence of NP. C-value 0.05 mg/m3, Main Group 1
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