Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection - Wisconsin Pollutant Discharge Elimination System › Chapter NR 218 - Method and manner of sampling › Section NR 218.04 - Definitions

Current through June 24, 2024
The definitions of ch. NR 205 apply to terms used in this
				  chapter and in WPDES permits not otherwise defined in this section.
(1) "Process waste" means any water which,
				during manufacturing or processing, comes into direct contact with or results
				from the production or use of any raw material, intermediate product, finished
				product, by product, or waste product, and is likely to contain in solution or
				suspension various components of such raw materials and products.
(2) "Domestic waste" means the type of waste
				normally discharged from plumbing facilities in private dwellings and includes,
				but is not limited to, sanitary, bath, laundry, dishwashing, garbage disposal
				and cleaning wastes.
(3) "Municipal
				waste" means the mixture of domestic, process, and other wastes tributary to
				any given municipal sanitary sewerage or treatment system.
(4) "Cooling water" means water which has
				been used primarily for cooling but which may be contaminated with process
				waste or airborne material, such as the discharge from barometric condensers or
				the blowdown from cooling towers.
(5) "Noncontact cooling water" means
				wastewater which has not come into contact with any raw material, intermediate
				or finished product, or waste and has been used in heat exchangers, air or
				refrigeration compressors or other cooling means where contamination with
				process waste is not normally expected.
(6) "Storm water" or "storm runoff" means
				water resulting from melting snow or rainfall, except that defined in sub.
				(7).
(7) "Contaminated storm water"
				means a point source discharge of storm water which the department has
				identified as a significant contributor of pollution in accordance with the
				definition of s.
				283.01(8),
				Stats.
(8) "Continuous effluent"
				means a discharge which is normally continuous throughout a day or during
				operating hours in any facility but which may be subject to interruptions or
				variations in volume.
(9) "Batch
				effluent" means a discharge which is periodic and of relatively short duration
				resulting from batch operations, washup operations, or periodic discharges from
				tanks, ponds, and recycling systems.
(10) "Grab sample" means a single sample
				taken at one moment of time or a combination of several smaller samples of
				equal volume taken in less than a 2 minute period. Where the term is used in
				connection with monitoring temperature or pH it means a single
				measurement.
(11) "Composite
				sample" means a combination of individual samples of equal volume taken at
				approximately equal intervals not exceeding one hour over a specified period of
				time.
(12) "24-hour composite
				sample" means a combination of individual samples taken at intervals of not
				more than one hour such that the volumes of each of the individual samples and
				of the combination are proportional to the volumes of flow during each interval
				and during the 24-hour period respectively.
(13) "Continuous sample" means a composite of
				successive individual samples of equal volume taken automatically at equal
				intervals not exceeding 15 minutes. Where the term is used in connection with
				monitoring temperature or pH it means continuous in-line recording or
				monitoring at intervals of not more than 15 minutes.
(14) "Proportional sample" means a composite
				of successive individual samples taken during operating or discharge hours,
				whichever is longer, where the individual samples are taken at frequent
				intervals not exceeding 15 minutes and are either:
(a) Such that the volume of each is
				proportional to the rate of flow at the time it is taken, or
(b) Are of equal volume and taken at
				intervals such that there is a constant volume of discharge during each
				interval.