N.H. Code Admin. R. Env-Dw 720 app APPENDIX C - CITED DEFINITIONS

Current through Register No. 25, June 20, 2024

Appendix - APPENDIX C - CITED DEFINITIONS

To Env-Dw 715 and Env-Dw 716 (Doc. #9619 and #9620, eff 1-1-10)

RSA 485:1-a Definitions. - As used in this chapter, unless the context clearly indicates otherwise, the following words shall have the following meanings:

I. "Community water system" means a public water system which serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents.

XI. "Non-transient non-community water system" means a system which is not a community water system and which serves the same 25 people, or more, over 6 months per year.

XVI. "Supplier of water" means any person who controls, owns or generally manages a public water system."

XV. "Public water system" means a system for the provision to the public of piped water for human consumption, if such system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days out of the year. Such term includes (1) any collection, treatment, storage, and distribution facilities under control of the operator of such system and used primarily in connection with such system, and (2) any collection or pretreatment storage facilities not under such control which are used primarily in connection with such system. Any water system which meets all of the following conditions is not a public water system:

(a) Consists only of distribution and storage facilities (and does not have any collection and treatment facilities);

(b) Obtains all of its water from, but is not owned or operated by, a public water system; and

(c) Does not sell water to any person.

NH Admin. Rules Env-Ws 302:

Env-Ws 302.29 "Filtration" means a process for removing particulate matter from water by passage through porous media.

Env-Ws 302.82 "Total trihalomethanes (TTHM)" means the sum of the concentration in mg/L of the trihalomethane compounds trichloromethane (chloroform), dibromochloromethane, bromodichloromethane, and tribromomethane (bromoform), rounded to 2 significant figures.

Env-Ws 302.83 "Transient non-community water system (TWS)" means a non-community water system that serves at least 25 persons in a transitory setting such as a restaurant for more than 60 days each year.

40 CFR 141.2:

"Coagulation means a process using coagulant chemicals and mixing by which colloidal and suspended materials are destabilized and agglomerated into flocs."

"Conventional filtration treatment means a series of processes including coagulation, flocculation, sedimentation, and filtration resulting in substantial particulate removal."

"Direct filtration means a series of processes including coagulation and filtration but excluding sedimentation resulting in substantial particulate removal."

"Disinfection means a process which inactivates pathogenic organisms in water by chemical oxidants or equivalent agents."

"Flocculation means a process to enhance agglomeration or collection of smaller floc particles into larger, more easily settleable particles through gentle stirring by hydraulic or mechanical means."

"Ground-water under the direct influence of surface water (GWUDI) means any water beneath the surface of the ground with significant occurrence of insects or other macroorganisms, algae, or large-diameter pathogens such as Giardia lamblia or Cryptosporidium, or significant and relatively rapid shifts in water characteristics such as turbidity, temperature, conductivity, or pH which closely correlate to climatological or surface water conditions."

"Haloacetic acids (five) (HAA5)" mean the sum of the concentrations in milligrams per liter of the haloacetic acid compounds (monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid, and dibromoacetic acid), rounded to 2 significant figures after addition."

"Legionella means a genus of bacteria, some species of which have caused a type of pneumonia called legionnaires disease."

"Sedimentation means a process for removal of solids before filtration by gravity or separation."

"Surface water means all water which is open to the atmosphere and subject to surface runoff."

"Virus means a virus of fecal origin which is infectious to humans by waterborne transmission."

N.H. Code Admin. R. Env-Dw 720 app APPENDIX C - CITED DEFINITIONS