EPA Method 835.2120

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EPA Method 835.2120:

This guideline describes a laboratory test method to assess abiotic hydrolytic transformations of chemicals in aquatic systems at pH values normally found in the environment (pH 4 ? 9). Chemicals can enter surface waters by such routes as direct application, spray drift, run-off, drainage, waste disposal, industrial, domestic or agricultural effluent and atmospheric deposition and may be transformed in those waters by chemical (e.g., hydrolysis, oxidation), photochemical and/or microbial processes. Experiments are performed to determine the rate of hydrolysis of the test substance as a function of pH and the identity or nature and rates of formation and decline of hydrolysis products to which organisms may be exposed. Studies apply to chemicals which are directly applied to water or that are likely to reach the environment by the other routes described in this paragraph.

This guideline is intended for use in meeting testing requirements of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) (7 U.S.C.136, et seq.) and for testing pursuant to the Toxic Substances Control Act (TSCA) (15 U.S.C. 2601, et seq.)