• 6.4.2(test for quality of final water)
6.4.2.1 Sampling
The sample shall be taken from the supply line as close as practicable to the WD. When the rinse water is stored in a tank within the WD, heated in a calorifier in the WD or otherwise treated within the WD, samples shall also be taken from the discharge point into the chamber.
6.4.2.2 Tests for chemical purity
Tests for chemical purity shall include tests for those determinands known to influence the efficacy of the process.
NOTE This can include, but is not limited to, tests to determine the value of the following: