This method of test covers determination of sulfate ion content in soil and water samples. The analytical procedure for water samples and for the extracts from soil samples is based on ASTM Designation: D 516, “Methods of Test for Sulfate Ion in Industrial Water and Industrial Waste Water.” The conductivity method for determining water-soluble sulfate in soil samples is based on that used at the U. S. Bureau of Reclamation.

This method of test outlines three procedures for evaluating the staining properties of water proposed for use in curing concrete. The Preliminary Method is intended for use in selecting sources that are worthy of more complete investigation. The Complete Method should be used to evaluate those sources that the Preliminary Method indicates to be promising. The Field Method should be used as a means of evaluating the source or sources finally selected for use.