New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Ws - Division of Water
Chapter Env-Ws 300 - NEW HAMPSHIRE DRINKING WATER RULES
Part Env-Ws 380 - FILTRATION, DISINFECTION, TREATMENT PLANT AND WASTE RECYCLING
Section Env-Ws 380.01 - Abbreviations

Universal Citation: NH Admin Rules Env-Ws 380.01

Current through Register No. 13, March 27, 2025

(a) "C" means residual disinfectant concentration in mg/l.

(b) "CT" or "Ctcalc" means the product of residual disinfectant concentration in mg/l determined before or at the first customer, and the corresponding disinfectant contact time in minutes, that is, C x T.

(c) "CPE" means comprehensive performance evaluation.

(d) "CTA" means comprehensive technical assistance.

(e) "CT99.9" means the CT value required for 99.9 per cent inactivation of giardia lamblia cysts as determined from Env-Ws 380.

(f) "HPC" means heterotrophic plate count.

(g) "Mg/L" means concentration in milligrams per liter.

(h) "NTU" means nephelometric turbidity units.

(i) "SW/GWUDISW" means surface water or groundwater under the direct influence of surface water.

(j) "T" means disinfectant contact time in minutes.

(k) "[SIGMA]" means "the sum of" in mathematical calculations.

#5098, eff 3-18-91, EXPIRED 3-18-97

New. #6521, eff 6-4-97 (See Revision Note at chapter heading for Env-Ws 300); ss by #8352, eff 5-14-05

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