Definitions

Definitions. Definitions. In this chapter: (1g) “Air gap” means the unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank or plumbing fixture and the flood level rim or spill level of the receptacle. (1r) “ANSI” means the American National Standards Institute. (2) “API” means the American Petroleum Institute. (3) “Approval” means the written approval of the department for any project requiring approval pursuant to s. 281.41 , Stats., and s. NR 108.03 for community systems. (4) “Aquifer storage recovery” or “ASR” means placement of treated drinking water underground through a well for the purpose of storing and later recovering the water through the same well for potable use. (5) “ASR system” means all of the ASR wells, ASR monitoring wells and related appurtenances within a municipal water system and any interconnected public water system served by the municipal water system. (6) “ASTM” or “ASTM International” means the organization formerly knows as the American Society for Testing and Material. (7) “AWWA” means the American Water Works Association. (8) “Blackwater” means wastewater contaminated by human body waste, toilet paper and any other material intended to be deposited in a receptor designed to receive urine or feces. (9) “Building” means a structure for support, shelter, or enclosure of persons or property. (10) “Building drain” means horizontal piping within or under a building, installed below the lowest fixture or the lowest floor level from which fixtures can drain by gravity to the building sewer. (11) “Building drain, storm” means a building drain which conveys storm water, clear water, or both. (12) “Building sewer” means that part of the drain system not within or under a building which conveys its discharge to a public sewer, private interceptor main sewer, private onsite wastewater treatment system or other point of discharge or dispersal. (13) “Building sewer, sanitary” means a building sewer which conveys wastewater consisting in part of domestic wastewater. (14) “Building sewer, storm” means a building sewer which conveys storm water, clear water, or both. (15) “Chlorine Institute” means the Chlorine Institute, Inc. (16) “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. Any water system serving 7 or more single family homes, 10 or more mobile homes, 10 or more apartment units, 10 or more duplex living units or 10 or more condominium units shall be considered a community water system unless information is provided by the owner indicating that 25 year-round residents will not be served. (17) “Cross connection” means a connection or potential connection between any part of a water supply system and another environment containing substances in a manner that, under any circumstances, would allow the substances to enter the water supply system by means of back siphonage or back pressure. (18) “CT” or “CT calc” is the product of the “residual disinfectant concentration” (C) in mg/l determined before or at the first customer, and the corresponding “disinfectant contact time” (T) in minutes, i.e., “C” x “T”. If a public water system applies disinfectants at more than one point prior to the first customer, the public water system owner or operator shall determine the CT of each disinfectant sequence before or at the first customer, to determine the total percent inactivation or “total inactivation ratio.” The inactivation ratio for a single disinfectant sequence is: (19) “Department” means the department of natural resources. (19m) “Dimension ratio” means the specified outside diameter of the pipe divided by the specified minimum wall thickness. (20) “Disinfectant contact time” (“T” in CT calculations) means the time in minutes that it takes for water to move from the point of disinfectant application or the previous point of disinfectant residual measurement to a point before or at the point where residual disinfectant concentration (“C”) is measured. Where only one “C” is measured, “T” is the time in minutes that it takes for water to move from the point of disinfectant application to a point before or where residual disinfectant concentration (“C”) is measured. Where more than one “C” is measured, “T” is determined as follows: (a) For the first measurement of “C”, the time in minutes that it takes for water to move from the first or only point of disinfectant application to a point before or at the point where the first “C” is measured. (b) For subsequent measurements of “C”, the time in minutes that it takes for water to move from the previous “C” measurement point to the “C” measurement point for which the particular “T” is being calculated. Disinfectant contact time in pipelines shall be calculated based on “plug flow” by dividing the internal volume of the pipe by the maximum hourly flow rate through the pipe. Disinfectant contact time within mixing basins and storage reservoirs shall be determined by tracer studies or other department approved equivalent demonstration. (21) “Disinfection profile” means a summary of daily Giardia lamblia inactivation through the treatment plant. The procedure for developing a disinfection profile is contained in s. NR 810.34 . (22) “Displacement zone” means the 3-dimensional subsurface region surrounding an aquifer storage recovery well into which treated drinking water is placed for storage and later recovery. (23) “Distribution system” means all pipes or conduits by which water is delivered to consumers except piping and fixtures inside buildings served, water services and private water mains as defined in ch. SPS 381 . (24) “Drillhole” means any of the following: (a) Any hole that is bored, drilled or driven. (b) Any dug hole that is deeper than it is wide. (c) Any excavation, shaft or other opening similar to a hole described in par. (a) or (b) . (25) “Dry land access” means a vehicular access route which is above the regional flood elevation and which connects land located in the floodplain to land outside the floodplain. (26) “Energy efficient” means that the proposed improvement will consume the minimum amount of energy to meet operational performance requirements throughout the life of the facility or system. (27) “Entry point” means a location in the water system after treatment or chemical addition, if any, but prior to the distribution system. A sample collected in the distribution system may be considered an entry point sample if the department has determined it is more representative of the water sources. (28) “Filtration” means a process for removing particulate matter from water by passage through porous media. (29) “Flocculation” means a process to enhance agglomeration or collection of smaller floc particles into larger, more easily settleable or filterable particles through gentle stirring by hydraulic or mechanical means. (29m) “Frazil ice” means ice formed in supercooled water as small particles moving turbulently enough to prevent the formation of a sheet of ice. (30) “French drain” means a buried dry well or sump that receives building domestic or floor drain wastewater or both. (31) “Graywater” means wastewater contaminated by waste materials, exclusive of urine, feces or industrial waste, deposited into plumbing drain systems. (32) “Groundwater” means any of the waters of the state, as defined in s. 281.01 (18) , Stats., occurring in a saturated subsurface geological formation of rock or soil. (33) “Groundwater source” means a source of groundwater obtained from horizontal collectors, infiltration lines, springs, and dug, drilled or other types of wells. (34) “Groundwater under the direct influence of surface water” (GWUDI) means any water beneath the surface of the ground with either of the following: (a) Occurrence of insects or other macroorganisms, algae or large diameter pathogens such as Giardia lamblia or Cryptosporidium , in greater than or equal to 10% of representative source water samples collected over a period of 6 months, immediately prior to the first or only point of disinfectant application. (b) Evidence of relatively rapid shifts in water characteristics such as turbidity, temperature, conductivity, or pH which closely correlate to climatological or surface water conditions where the department determines that these shifts are indications of the potential for contamination of the groundwater by the organisms identified in par. (a) . (35) “Hydrofracturing” means hydraulic fracturing of an aquifer by injecting potable chlorinated water into a bedrock formation well under pressures great enough to open the bedrock along bedding planes, joints and fractures. (36) “Impulse generation” or “gas bursting” means the directed quick release of compressed gases and other impulse generation techniques used to develop or rehabilitate drillholes, well screens and gravel pack. (37) “Infiltration component” means any device or method that is intended to promote the assimilation of water into in situ soil. (37d) “Intake structure” means a structure located at the end of a surface water intake intended to collect and divert raw water from a surface water source into a raw water transmission pipe or channel for the purpose of a surface water supply. An intake structure may include provisions for exclusion of debris from the intake pipe. (37h) “Interconnection” means the connection between 2 public water systems that allows for the transfer of water between each system.