Replace the cap carefully and tightly. For a 120mL bottle with just one line, fill to the shoulder, above the line. If your system chlorinates, a chlorine residual must be measured at the same
How To Collect A Drinking Water Total Coliform Sample
How native speakers pronounce “chlorinates”
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Replace the cap carefully and tightly. For a 120mL bottle with just one line, fill to the shoulder, above the line. If your system chlorinates, a chlorine residual must be measured at the same
How To Collect A Drinking Water Total Coliform Sample