Chlorine residual testing Clause Samples

Chlorine residual testing. Total and free chlorine residual levels were tested using the ▇▇▇▇▇▇▇ Single Test Colorimeter® (model 1200). Two samples were collected and tested for free and total chlorine. Water was collected using a WhirlPak® bag that did not contain sodium thiosulfate. The target range for chlorine residual in drinking water, as defined by the Centers for Disease Control was 0.2 – 2.0 mg/L or ppm. Between samples, the vials were rinsed with non-chlorinated, bottled water.