... or corrosion situation: Chloride content greater than 500 ppm, Sulfate concentration greater than 500 ppm, Mine or industrial runoff, High organic content, pH less than 5.5, Marine ... than 5.5, pH between 5.5 and 8.5 in soils with high organicC10.7.5Resistivity, pH, chloride content, and sulfateconcentration values have been adapted fromthose in Fang (1991) and Tomlinson ... should extend into noncorrosive soils afew feet because the lower portion of the coating is10-119 content, Sulfate concentrations greater than I,000 ppm, Landfills and cinder fills, Soils...