NR 809.04(41) (41) "Haloacetic acids (five)" or "HAA5" means 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.

NR 809.04(42) (42) "Holding time" means the period from time of sampling to time of analysis.

NR 809.04(43) (43) "Initial compliance period" means the first full 3-year compliance period which begins at least 18 months after promulgation of the federal regulations. For monitoring contaminants in ss. NR 809.11 (2) and 809.20 (1), the initial compliance period means January 1993 — December 1995 for public water systems with 150 or more service connections and January 1996 — December 1998 for public water systems having fewer than 150 service connections.

NR 809.04(44) (44) "Initial Distribution System Evaluation or "IDSE" means an evaluation using monitoring to determine locations with representative high TTHM and HAA5 concentrations throughout the distribution system of a public water system.

NR 809.04(45) (45) "Large water system" means, for the purpose of monitoring lead and copper, a public water system that serves more than 50,000 persons.

NR 809.04(46) (46) "Lead service line" means a service line made of lead which connects the water main to the building inlet and any lead pigtail, gooseneck or other fitting which is connected to such lead line.

NR 809.04(47) (47) "Legionella" means a genus of bacteria, some species of which have caused a type of pneumonia called Legionnaires disease.

NR 809.04(48) (48) "Locational running annual average" or "LRAA" means the average of sample analytical results for samples taken at a particular monitoring location during the previous four calendar quarters.

NR 809.04(49) (49) "Long term 2 surface water treatment rule" or "LT2" means the monitoring and requirements under the federal rule 40 CFR part 141 Subpart W.

NR 809.04(50) (50) "Man-made beta particle and photon emitters" means all radionuclides emitting beta particles or photons, or both, listed in Maximum Permissible Body Burdens and Maximum Permissible Concentration of Radionuclides in Air or Water for Occupational Exposure, NBS Handbook 69, except the daughter products of thorium-232, uranium-235 and uranium-238.

NR 809.04(51) (51) "Maximum contaminant level" or "MCL" means the maximum permissible level of a contaminant in water which is delivered to any user of a public water system.

NR 809.04(52) (52) "Maximum contaminant level goal" or "MCLG" means the maximum level of a contaminant in drinking water at which no known or anticipated adverse affect on the health of persons would occur, and which allows an adequate margin of safety. Maximum contaminant level goals are non-enforceable health goals, unless the department determines that action is necessary to protect public health.

NR 809.04(53) (53) "Maximum residual disinfectant level" or "MRDL" means a level of a disinfectant added for water treatment that may not be exceeded at the consumer's tap without an unacceptable possibility of adverse health effects.

NR 809.04(54) (54) "Maximum residual disinfectant level goal" or "MRDLG" means the maximum level of a disinfectant added for water treatment at which no known or anticipated adverse effect on the health of persons would occur, and which allows an adequate margin of safety. MRDLGs are nonenforceable health goals and do not reflect the benefit of the addition of the chemical for control of waterborne microbial contaminants.

NR 809.04(55) (55) "Medium-size water system" means, for the purpose of monitoring lead and copper, a public water system that serves greater than 3,300 and less than or equal to 50,000 persons.

NR 809.04(56) (56) "Near the first service connection" means at one of the 20% of all service connections in the entire distribution system that are nearest the water supply treatment facility or water supply source, as measured by water transport time within the distribution system.

NR 809.04(57) (57) "Non-community water system" or "NCWS" means a public water system that is not a community water system. A non-community water system is either a non-transient non-community water system or a transient non-community water system.

NR 809.04(58) (58) "Non-transient non-community water system" or "NTNCWS" means a non-community water system that regularly serves at least 25 of the same persons over 6 months per year.

NR 809.04(59) (59) "Optimal corrosion control treatment" means the corrosion control treatment that minimizes the lead and copper concentrations at users' taps while insuring that the treatment does not cause the public water system to violate any national primary drinking water regulations as listed in 40 CFR part 141.

NR 809.04(60) (60) "Person" means an individual, corporation, company, association, cooperative, trust, institution, partnership, state, municipality, or federal agency.

NR 809.04(61) (61) "Picocurie" or "pCi" means that quantity of radioactive material producing 2.22 nuclear transformations per minute.

NR 809.04(62) (62) "Plant" means any facility for the obtainment of potable water, whether from surface water or groundwater sources, for a community water system.

NR 809.04(63) (63) "Point-of-disinfectant application" is the point where the disinfectant is applied and water downstream of that point is not subject to recontamination by surface runoff.

NR 809.04(64) (64) "Point-of-entry treatment device" or "POE" is a water treatment device applied to the drinking water entering a house or building for the purpose of reducing contaminants in the drinking water distributed throughout the house or building.

NR 809.04(65) (65) "Point-of-use treatment device" or "POU" is a water treatment device applied to a single tap used for the purpose of reducing contaminants in drinking water at that one tap.

NR 809.04(66) (66) "Primary maximum contaminant levels" means those maximum contaminant levels which represent minimum public health standards.

NR 809.04(67) (67) "Public water system"or "PWS" means a system for the provision to the public of piped water for human consumption through pipes or other constructed conveyances, if the 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. A public water system is either a "community water system" or a "non-community water system." A public water system:

NR 809.04(68) (68) "Rem" means the unit of dose equivalent from ionizing radiation to the total body or any internal organ or organ system. A "millirem" or "mrem" is 1/1000 of a rem.

NR 809.04(69) (69) "Repeat compliance period" means any subsequent compliance period after the initial compliance period.

NR 809.04(70) (70) "Residual disinfectant concentration" ("C" in CT calculations) means the concentration of disinfectant measured in mg/l in a representative sample of water.

NR 809.04(71) (71) "Running annual average" means the sum of 1, 2, 3 or 4 calendar quarter sample results divided by 4. The first sample may be the average of the initial and confirmation sample results. If more than 4 calendar quarters of samples have been collected in more than 4 consecutive calendar quarters, the results from the 4 most recent quarters shall be used. If multiple compliance samples are collected in a single calendar quarter, the sample which yielded the highest concentration shall be used to calculate the running annual average. If a quarterly sample is not taken within a required consecutive quarter then the divisor shall be the number of quarterly samples that have been analyzed within the required time period.

NR 809.04(72) (72) "Sanitary survey" means an on-site inspection of the water source, facilities, equipment, operation and maintenance of a public water system for the purpose of evaluating the adequacy of the source, facilities, equipment, operation and maintenance for producing and distributing safe drinking water.

NR 809.04(73) (73) "Secondary drinking water standards" means those standards for aesthetic parameters which represent minimum public welfare concerns but do not represent health standards.

NR 809.04(74) (74) "Sedimentation" means a process for removal of solids before filtration by gravity or separation.

NR 809.04(75) (75) "Service line sample" means a one-liter sample of water that has been standing for at least 6 hours in a service line.

NR 809.04(76) (76) "Significant deficiency" includes, but is not limited to, defects in design, operation, or maintenance of a public water system, or a failure or malfunction of the water sources, treatment, storage or distribution system of a public water system that the department determines to be causing the introduction of contamination into the water delivered to consumers or when the department determines that a health risk exists to consumers of the water.

NR 809.04(77) (77) "Single family structure" means a building constructed as a single-family residence that is currently used as either a residence or a place of business.

NR 809.04(78) (78) "Slow sand filtration" means a process involving passage of raw water through a bed of sand at low velocity, generally less than 0.4 m/h, resulting in substantial particulate removal by physical and biological mechanisms.

NR 809.04(79) (79) "Small water system" means, for the purposes of monitoring lead and copper, a public water system that serves 3,300 persons or fewer.

NR 809.04(80) (80) "Special irrigation district" means an irrigation district in existence prior to May 18, 1994 that provides primarily agricultural service through a piped water system with only incidental residential or similar use where the system or the residential or similar users of the system are supplied with water that meets all maximum contaminant levels of subch. I.

NR 809.04(81) (81) "Stage 1 Disinfection Byproducts" or "Stage 1 DBP" means the compliance requirements under the federal rule 40 CFR part 141 Subpart L.

NR 809.04(82) (82) "Stage 2 Disinfection Byproducts" or "Stage 2 DBP" means the compliance requirements under the federal rule 40 CFR part 141 Subpart U.

NR 809.04(83) (83) "Surface water" means all water which is open to the atmosphere and subject to surface runoff.

NR 809.04(84) (84) "Surface water systems" means public water systems using surface water or groundwater under the direct influence of surface water as a source and that are subject to the requirements of 40 CFR 141, subpart H, which contains the national primary drinking water regulations.

NR 809.04(85) (85) "SUVA" means specific ultraviolet absorption at 254 nanometers (nm).

NR 809.04(86) (86) "System with a single service connection" means a public water system which supplies drinking water to consumers via a single service line.

NR 809.04(87) (87) "Too numerous to count" means that the total number of bacterial colonies exceeds 200 on a 47-mm diameter membrane filter used for coliform detection.

NR 809.04(88) (88) "Total organic carbon" or "TOC" means total organic carbon in mg/L measured using heat, oxygen, ultraviolet irradiation, chemical oxidants or combinations of these oxidants that convert organic carbon to carbon dioxide, rounded to 2 significant figures.

NR 809.04(89) (89) "Transient non-community water system" or "TNCWS" means a non-community water system that serves at least 25 people at least 60 days of the year but does not regularly serve at least 25 of the same persons over 6 months per year.

NR 809.04(90) (90) "Waterborne disease outbreak" means the significant occurrence of acute infectious illness, epidemiologically associated with the ingestion of water from a public water system which is deficient in treatment or is supplied from a contaminated source, as determined by the department or other local or state agency.

NR 809.04(91) (91) "Water supplier" means any person who owns or operates a public water system.

NR 809.04(92) (92) "Wholesale system" means a public water system that treats source water as necessary to produce finished water and then delivers some or all of that finished water to another public water system. Delivery may be through a direct connection or through the distribution system of one or more consecutive systems.

NR 809.04(93) (93) "Virus" means a virus of fecal origin which is infectious to humans by waterborne transmission.

NR 809.05(1) (1) Consists only of distribution and storage facilities and does not have any collection or treatment facilities.

NR 809.05(2) (2) Obtains all of its water from, but is not owned or operated by, a public water system to which the regulations in this chapter apply.

NR 809.05(3) (3) Does not sell water to any person.

NR 809.05(4) (4) Is not a carrier which conveys passengers in interstate commerce.

NR 809.07(1) (1) Maximum contaminant level goals (MCLGs) are zero for the following contaminants: