25 May 2005
SOW -- Statement of work
SRB -- Sulfate-reducing bacteria
SS -- Suspended solids
TA -- Total alkalinity
TDS -- Total dissolved solids
TSCA -- Toxic Substances Control Act
TSP -- Trisodium phosphate
TSS -- Total suspended solids
TTA -- Tolytriazole
UFC -- Unified Facilities Criteria
USACE -- U.S. Army Corps of Engineers
W -- Watt
Acid -- A compound, usually having a sour taste, which can neutralize an alkali or
base; a substance that dissolves in water with a formation of hydrogen ions.
Aeration -- Intimate contact between air and liquid by one of the following methods:
spraying the liquid in the air; bubbling air through the liquid; or agitating the liquid to
promote surface absorption of air.
Algae -- Tiny plant life, usually microscopic, existing in water. They are mostly green,
blue-green, or yellow-green, and are the cause of most tastes and odors in water. They
create suspended solids (SS) when they grow in an industrial water system.
Alkalinity -- (a) A term used to represent the content of carbonates, bicarbonates,
hydroxides, and occasionally borates, silicates, and phosphates in water. (b) The
capacity of water to react with hydrogen ions.
Alkalinity, total or mixed indicator (M) -- A measure of the total alkalinity of water.
Measured by the quantity of 0.02 normality (N) sulfuric acid required to bring water to
pH of 4.4, as indicated by the change in color of methyl orange or a mixed indicator.
Results are expressed in parts per million (ppm) as calcium carbonate.
Alkalinity, Phenolphthalein (P) -- A measure of hydroxide ions (OH) plus one-half of
the normal carbonates in water. Measured by the quantity of 0.02 normality (N) sulfuric
acid required to bring the water to pH 8.2, as indicated by the de-colorization of
phenolphthalein indicator. Results are expressed in parts per million (ppm) as calcium
Alkalinity, Hydroxyl -- A measure of hydroxyl ion (OH-) contribution to the alkalinity.
This is related to the system pH and also may be referred to as "causticity."