Section 653.602  Testing Equipment for Residual Chlorine

a)         Residual chlorine shall be determined by methods in "Standard Methods for the Examination of Water and Wastewater", 15th edition.

b)         Colorimetric determinations of chlorine residuals shall be made using the DPD methods.

c)         The test equipment used shall be capable of indicating values of 0.1, 0.2, 0.3, 0.4, 0.5, 0.7, 1.0, 2.0, mg/l and higher if chlorine is applied for taste and odor control.