Assertion: cold water's effect | /r/HasProperty | determined
Facets:
value: empirically
type: MANNER
Source sentences:
text: The effect of the water chemistry can be empirically determined though use of the Pitting Propensity Rating (PPR) a number that takes into account the sulfate, chloride, nitrate and sodium ion concentrations of the water as well as its acidity or pH. A water with a positive PPR has been shown to be capable of propagating Type 1 pits.