Treatment Techniques

40 CFR 141, Subpart K, is incorporated by reference. (7-1-26) 108. DISINFECTION RESIDUALS, DISINFECTION BYPRODUCTS, AND DISINFECTION BYPRODUCT PRECURSORS. 40 CFR Part 141, Subpart L is incorporated by reference. DPD colorimetric test kits may be used to measure residual disinfectant concentrations for chlorine, chloramines, and chlorine dioxide. (7-1-26) 109. – 110. (RESERVED)