A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z
WAP
Waste Analysis Plan.
waste
unwanted materials left over from manufacturing processes, refuse from places of human or animal habitation.
waste load allocation
the maximum load of pollutants each discharger of waste is allowed to release into a particular wasteway. Discharge limits are usually required for each specific water quality criterion being, or expected to be, violated.
waste treatment plant
a facility containing a series of tanks, screens, filters and other processes by which pollutants are removed from water.
waste treatment stream
the continuous movement of waste from generator to treater and disposer.
wastewater
any water that has been released from the purpose for which it was intended to be used.
wastewater operations and maintenance
actions taken after construction to assure that facilities constructed to treat wastewater will be properly operated, maintained, and managed to achieve efficiency levels and prescribed effluent levels in an optimum manner.
wastewater constituents
those materials which are carried by or dissolved in a water stream for disposal.
wastewater treatment tank
means a tank that is designed to receive and treat an influent wastewater through physical, chemical, or biological methods.
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, as determined by the appropriate local or State agency.
waterflooding
a process of displacing oil from underground formations with water and returning it to the surface for recovery.
water hammer
instantaneous surges of water pressure caused by sudden interruptions in water flow in pipe or tank systems.
water pollution
the addition of enough harmful or objectionable material to damage water quality.
water purification
any process that involves removing or reducing the level of suspended or dissolved contaminants from a water supply.
water quality criteria
the levels of pollutants that affect use of water for drinking, swimming, raising fish, farming or industrial use.
water quality standard
a management plan that considers, 1) what water will be used for 2) setting levels to protect those uses 3) implementing and enforcing the water treatment plans and 4) protecting existing high quality waters.
water reactive
describes a material that reacts with water to release a flammable gas or to present a health hazard.
water recirculation or recycling
volume of water already used for some purpose in the plant which is returned with or without treatment to be used again in the same or another process.
watershed
the land area that drains into a stream.
water softening
to exchange sodium for the harness in water by ion exchange. The removal of calcium and magnesium, the ions which are the principle cause of hardness, from water.
water solubility
the maximum concentration of a chemical compound which can result when it is dissolved in water. If a substance is water soluble it can very readily disperse through the environment.
water supplier
a person who owns or operates a public water system.
water supply system
the collection, treatment, storage and distribution of potable water from source to consumer.
water table
the level of ground water.
watershed
the land area that drains into a stream.
water use
total volume of water applied to various uses in the plant. It is the sum of water recirculation and water withdrawal.
WBA
(abbr.) weakly basic anion resin.
WDR
Waste Discharge Report.
WDROP
Distribution Register of Organic Pollutants in Water.
weak electrolyte
the equivalent of weakly acidic or weakly basic resins not capable of splitting neutral salts.
WEEL
Workplace Environmental Exposure Level Guides are established by the AIHA (American Industrial Hygiene Association) WEEL Committee for substances which do not have exposure guidelines established by other organizations [see TLVs]. All WEELs are expressed as time-weighted average (TWA) concentrations; however, different time periods are specified depending on the properties of the material.
weight of evidence
an EPA classification system for characterizing the extent to which the available data indicate that an agent is a human carcinogen.
weight solids
solids content based on weight.
weir
a spillover device used to measure or control water flow.
well
a bored, drilled, or driven shaft, or a dug hole, whose depth is greater than the largest surface dimension and whose purpose is to reach underground water supplies or oil, or to store or bury fluids below ground.
well injection
the subsurface emplacement of fluids in a well.
well plug
a watertight and gastight seal installed in a bore hole or well to prevent movement of fluids.
WENDB
Water Enforcement National Data Base.
WERL
Water Engineering Research Laboratory.
WES
Waterways Experiment Station.
WET
Waste Extraction Test.
wetlands
an area that is regularly saturated by surface or ground water and subsequently is characterized by a prevalence of vegetation that is adapted for life in saturated soil conditions. Examples include: swamps, bogs, fens, marshes, and estuaries.
white liquor
cooking liquor from the kraft pulping process produced by recausticizing green liquor with lime.
white water
the filtrate from a paper-or board-forming machine, usually recycled for density control.
WHMIS
Workplace Hazardous Materials Information System. A Canadian nationwide system to provide information to workers on hazardous materials used in the workplace through the use of MSDSs.It is the Canadian counterpart of the OSHA Hazard Communication Standard, but has different provisions and interpretations.
wildlife refuge
an area designated for the protection of wild animals, within which hunting and fishing are either prohibited or strictly controlled.
WICEM
World Industry Conference on Environmental Management.
WINC
Woman with Infant Children.
WLA/TMDL
Waste Load Allocation/Total Maximum Daily Load.
WMMA
Waste Materials Management Act.
wood-burning stove pollution
air pollution caused by emissions of particulate matter, carbon monoxide, total suspended particulates, and polycyclic organic matter from wood- burning stoves.
working level (WL)
a unit of measure for documenting exposure to radon decay products. One working level is equal to approximately 200 picocuries per liter.
working level month (WLM)
a unit of measure used to determine cumulative exposure to radon.
WPCF
Water Pollution Control Federation.
WQA
Water Quality Act of 1987.
WQMP
Water Quality Management Plan.
WRC
Water Resources Council.
WRDA
Water Resources Development Act.
WSF
Water Soluble Fraction.
WSRA
Wild and Scenic Rivers Act.
WYSWYG
What You See is What You Get.
