PARAMETER | LIMITS | FREQUENCY |
resistivity | > 0.5 megaohms/cm | monthly |
Pb, Cd, Cr, Cu, Ni, Zn | < 0.05 mg/L per contaminant and < 0.1 mg/L total | annually |
total chlorine residual | none detectable | monthly |
Heterotrophic plate count | < 500/mL | monthly |
bacteriological quality of reagent water. | ratio of growth rate: 0.8 to 3.0 (see Standard Methods, Section 9020B. This test is not required if laboratories use water that meets the criteria for Types I and II water as defined in Standard Methods Section 1080). | annually |
216 R.I. Code R. 216-RICR-60-05-6.14