Assertion: urine's level | /r/HasProperty | 2-4 parts per million or ppm
Facets:
Source sentences:
text: [ppm]) and pH (7.2-7.8) maximize germ-killing power Hot tubs/spas: disinfectant level (chlorine [2-4 parts per million or ppm] or bromine [4-6 ppm] and pH [7.2-7.8]) maximize germ-killing power